WO2010140825A2 - Procédé et appareil d'émission et de réception d'informations de commande dans un système multiporteuse - Google Patents

Procédé et appareil d'émission et de réception d'informations de commande dans un système multiporteuse Download PDF

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Publication number
WO2010140825A2
WO2010140825A2 PCT/KR2010/003514 KR2010003514W WO2010140825A2 WO 2010140825 A2 WO2010140825 A2 WO 2010140825A2 KR 2010003514 W KR2010003514 W KR 2010003514W WO 2010140825 A2 WO2010140825 A2 WO 2010140825A2
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control
information
component carrier
physical
downlink
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PCT/KR2010/003514
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English (en)
Korean (ko)
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WO2010140825A3 (fr
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정재훈
이문일
문성호
한승희
권영현
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엘지전자 주식회사
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Publication of WO2010140825A3 publication Critical patent/WO2010140825A3/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

Definitions

  • the following description relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving control information in a multi-carrier system.
  • uplink bandwidth and downlink bandwidth are generally symmetrical to each other.
  • ITU International Telecommunication Union
  • carrier aggregation Bandwidth Aggregation
  • Spectrum Aggregation for efficient use of fragmented small bands to achieve the same effect as combining multiple bands physically in the frequency domain and using bands of logically large bands.
  • Carrier aggregation is introduced to support increased throughput, to prevent cost increases due to the introduction of wideband RF devices, and to ensure compatibility with existing systems.
  • Carrier aggregation means that data is exchanged between a terminal and a base station through a plurality of bundles of carriers in a bandwidth unit defined in an existing wireless communication system (for example, 3GPP LTE release 8 or 9 system in the case of 3GPP LTE-Advanced system).
  • the carrier of the bandwidth unit defined in the existing wireless communication system may be referred to as a component carrier (CC).
  • the carrier aggregation technology may include a technology that supports a system bandwidth of up to 100 MHz by binding up to 5 component carriers even though one component carrier supports a bandwidth of 5 MHz, 10 MHz, or 20 MHz.
  • control information and / or data may be transmitted / received through one component carrier.
  • a method of transmitting information related to transmission of control information such as the number of transmission symbols through which control information on a component carrier is transmitted, is not specifically determined.
  • An object of the present invention is to provide a method and apparatus for transmitting / receiving control information of a component carrier in a multi-carrier system.
  • the terminal to receive the control information related to the multi-carrier from the base station, the step of receiving control format indicator (CFI) information for the multi-carrier, the multiple Receiving physical HARQ indicator channel (PHICH) duration information for a carrier, receiving a physical downlink control channel (PDCCH) for the multicarrier, and using the CFI information and the PHICH duration information And decoding control channel to obtain control information for the multicarrier, wherein the PHICH duration information may be received through control signaling from the base station.
  • CFI control format indicator
  • PHICH multiple Receiving physical HARQ indicator channel
  • PDCH physical downlink control channel
  • decoding control channel to obtain control information for the multicarrier, wherein the PHICH duration information may be received through control signaling from the base station.
  • control signaling may include one or more of radio resource control (RRC) signaling or L1 / L2 control signaling.
  • RRC radio resource control
  • control signaling may be UE-specific, UE group-specific, cell-specific or cell cluster-specific control signaling. .
  • the CFI information or the PHICH duration information may be set to component carrier-specific or component carrier-common with respect to a component carrier constituting the multicarrier.
  • the PHICH duration information may be received through the control signaling together with predetermined control information for a component carrier constituting the multicarrier.
  • the predetermined control information on the component carrier may include physical transmission antenna configuration information for each uplink or downlink component carrier, antenna port configuration information for each uplink or downlink component carrier, and the downlink.
  • Channel state information-reference signal (CSI-RS) configuration information for each link component carrier, bandwidth configuration information for each uplink or downlink component carrier, or channel sounding reference signal for each uplink component carrier ( SRS) configuration information may be included.
  • the base station transmits multi-carrier related control information to a terminal, the step of transmitting control format indicator (CFI) information for the multi-carrier, the multi Transmitting physical HARQ indicator channel (PHICH) duration information for a carrier; and transmitting a physical downlink control channel (PDCCH) for the multicarrier, wherein the CFI information and the PHICH duration information include: It is used to decode the physical downlink control channel of and to obtain control information for the multi-carrier, the PHICH duration information can be transmitted from the base station through control signaling.
  • CFI control format indicator
  • PHICH physical HARQ indicator channel
  • control signaling may include one or more of radio resource control (RRC) signaling or L1 / L2 control signaling.
  • RRC radio resource control
  • control signaling may be UE-specific, UE group-specific, cell-specific or cell cluster-specific control signaling. .
  • the CFI information or the PHICH duration information may be set to component carrier-specific or component carrier-common for component carriers constituting the multicarrier.
  • the PHICH duration information may be transmitted through the control signaling together with predetermined control information on a component carrier constituting the multicarrier.
  • the predetermined control information on the component carrier may include physical transmission antenna configuration information for each uplink or downlink component carrier, antenna port configuration information for each uplink or downlink component carrier, and the downlink.
  • Channel state information-reference signal (CSI-RS) configuration information for each link component carrier, bandwidth configuration information for each uplink or downlink component carrier, or channel sounding reference signal for each uplink component carrier ( SRS) configuration information may be included.
  • a terminal receiving multi-carrier related control information from a base station according to another embodiment of the present invention, a physical layer module configured to receive and decode physical layer control information and data from the base station, And a processor configured to control the terminal, the radio resource control layer module configured to receive and process radio resource control (RRC) signals from the base station, the physical layer module, and the radio resource control layer module.
  • RRC radio resource control
  • PCFICH physical control format indicator channel
  • PDCCH physical downlink control channel
  • CFI control format indicator
  • Control signaling through a physical layer module or the radio resource control layer module The physical layer module or the radio resource control layer module is controlled to obtain physical HARQ indicator channel (PHICH) duration information for the multicarrier through control signaling through the control signal, and the CFI information and the PHICH duration information are used.
  • PHICH physical HARQ indicator channel
  • a base station for transmitting multicarrier-related control information to a terminal a physical layer module configured to transmit physical layer control information and data to the terminal, the terminal And a processor configured to control the base station including a radio resource control layer module, the physical layer module, and a radio resource control layer module, the radio resource control layer module configured to transmit a radio resource control (RRC) signal to the mobile station.
  • RRC radio resource control
  • Control the physical layer module to transmit a physical control format indicator channel (PCFICH) and a physical downlink control channel (PDCCH) for a carrier, and control signaling through the physical layer module or control signaling through the radio resource control layer module Transmits the physical HARQ indicator channel (PHICH) duration information for the multicarrier through And control the physical layer module or the radio resource control layer module so that the CFI information and the PHICH duration information may be used for decoding the physical downlink control channel of the terminal and obtaining control information for the multicarrier.
  • PCFICH physical control format indicator channel
  • PDCCH physical downlink control channel
  • a method and apparatus for efficiently transmitting / receiving control information on a component carrier in a multi-carrier system are provided.
  • the terminal can simplify the operation for acquiring the information related to the transmission of control information and reduce the delay.
  • 1 is a diagram illustrating a structure of a radio frame.
  • FIG. 2 is a diagram illustrating a resource grid in a downlink slot.
  • 3 is a diagram illustrating a structure of a downlink subframe.
  • FIG. 4 is a diagram illustrating a structure of an uplink subframe.
  • 5 is a diagram illustrating physical channels and signal transmission and reception using them.
  • FIG. 6 is a diagram illustrating component carriers constituting a multicarrier.
  • FIG. 7 is a diagram illustrating the configuration of a base station apparatus and a terminal apparatus according to an embodiment of the present invention.
  • each component or feature may be considered to be optional unless otherwise stated.
  • Each component or feature may be embodied in a form that is not combined with other components or features.
  • some components and / or features may be combined to form an embodiment of the present invention.
  • the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.
  • the base station has a meaning as a terminal node of the network that directly communicates with the terminal.
  • the specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.
  • a 'base station (BS)' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point (AP), and the like.
  • the repeater may be replaced by terms such as relay node (RN) and relay station (RS).
  • the term “terminal” may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), a subscriber station (SS), and the like.
  • Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802 system, 3GPP system, 3GPP LTE and LTE-Advanced (LTE-A) system and 3GPP2 system. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
  • 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).
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A Advanced
  • WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system). For clarity, the following description focuses on 3GPP LTE and 3GPP LTE-A systems, but the technical spirit of the present invention is not limited thereto.
  • FIG. 1 is a diagram illustrating a structure of a radio frame used in a 3GPP LTE system.
  • One radio frame includes 10 subframes, and one subframe includes two slots in the time domain.
  • the time for transmitting one subframe is defined as a transmission time interval (TTI).
  • TTI transmission time interval
  • one subframe may have a length of 1 ms, and one slot may have a length of 0.5 ms.
  • One slot may include a plurality of OFDM symbols in the time domain. Since the 3GPP LTE system uses the OFDMA scheme in downlink, the OFDM symbol represents one symbol length.
  • One symbol may be referred to as an SC-FDMA symbol or a symbol length in uplink.
  • a resource block (RB) is a resource allocation unit and includes a plurality of consecutive subcarriers in one slot.
  • the structure of such a radio frame is merely exemplary. Accordingly, the number of subframes included in one radio frame, the number of slots included in one subframe, or the number of OFDM symbols included in one slot may be changed in various ways.
  • FIG. 2 is a diagram illustrating a resource grid in a downlink slot.
  • One downlink slot includes seven OFDM symbols in the time domain and one resource block (RB) is shown to include 12 subcarriers in the frequency domain, but the present invention is not limited thereto.
  • one slot includes 7 OFDM symbols in the case of a general cyclic prefix (CP), but one slot may include 6 OFDM symbols in the case of an extended-CP (CP).
  • Each element on the resource grid is called a resource element.
  • One resource block includes 12 ⁇ 7 resource elements.
  • the number of N DLs of resource blocks included in the downlink slot depends on the downlink transmission bandwidth.
  • the structure of the uplink slot may be the same as the structure of the downlink slot.
  • FIG. 3 is a diagram illustrating a structure of a downlink subframe.
  • Up to three OFDM symbols at the front of the first slot in one subframe correspond to a control region to which a control channel is allocated.
  • the remaining OFDM symbols correspond to data regions to which a physical downlink shared channel (PDSCH) is allocated.
  • Downlink control channels used in the 3GPP LTE system include, for example, a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), and a Physical HARQ Indicator Channel.
  • PCFICH Physical Hybrid automatic repeat request Indicator Channel
  • the PCFICH is transmitted in the first OFDM symbol of a subframe and includes information on the number of OFDM symbols used for control channel transmission in the subframe.
  • the PHICH includes a HARQ ACK / NACK signal as a response of uplink transmission.
  • Control information transmitted through the PDCCH is referred to as downlink control information (DCI).
  • DCI includes uplink or downlink scheduling information or an uplink transmit power control command for a certain terminal group.
  • the PDCCH is a resource allocation and transmission format of the downlink shared channel (DL-SCH), resource allocation information of the uplink shared channel (UL-SCH), paging information of the paging channel (PCH), system information on the DL-SCH, on the PDSCH Resource allocation of upper layer control messages such as random access responses transmitted to the network, a set of transmit power control commands for individual terminals in an arbitrary terminal group, transmission power control information, and activation of voice over IP (VoIP) And the like.
  • a plurality of PDCCHs may be transmitted in the control region.
  • the terminal may monitor the plurality of PDCCHs.
  • the PDCCH is transmitted in a combination of one or more consecutive Control Channel Elements (CCEs).
  • CCEs Control Channel Elements
  • the CCE is a logical allocation unit used to provide a PDCCH at a coding rate based on the state of a radio channel.
  • the CCE corresponds to a plurality of resource element groups.
  • the format of the PDCCH and the number of available bits 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 transmitted to the terminal, and adds a cyclic redundancy check (CRC) to the control information.
  • the CRC is masked with an identifier called a Radio Network Temporary Identifier (RNTI) according to the owner or purpose of the PDCCH.
  • RNTI Radio Network Temporary Identifier
  • the cell-RNTI (C-RNTI) identifier of the terminal may be masked to the CRC.
  • a paging indicator identifier P-RNTI
  • the PDCCH is for system information (more specifically, system information block (SIB))
  • SI-RNTI system information RNTI
  • RA-RNTI Random Access-RNTI
  • RA-RNTI may be masked to the CRC to indicate a random access response that is a response to the transmission of the random access preamble of the terminal.
  • the uplink subframe may be divided into a control region and a data region in the frequency domain.
  • a physical uplink control channel (PUCCH) including uplink control information is allocated to the control region.
  • a physical uplink shared channel (PUSCH) including user data is allocated.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • one UE does not simultaneously transmit a PUCCH and a PUSCH.
  • PUCCH for one UE is allocated to an RB pair in a subframe. Resource blocks belonging to a resource block pair occupy different subcarriers for two slots. This is called a resource block pair allocated to the PUCCH is frequency-hopped at the slot boundary.
  • FIG. 5 is a diagram for describing physical channels used in a 3GPP LTE system and a general signal transmission method using the same.
  • a user equipment may receive information from a base station through downlink, and the terminal may also transmit information through uplink.
  • the information transmitted or received by the terminal includes data and various control information, and various physical channels exist according to the type and purpose of the information transmitted or received by the terminal.
  • the terminal which is powered on again or enters a new cell while the power is turned off performs an initial cell search operation such as synchronizing with the base station in step S501.
  • the UE may receive a primary synchronization channel (P-SCH) and a secondary synchronization channel (S-SCH) from the base station to synchronize with the base station and obtain information such as a cell ID.
  • the terminal may receive a physical broadcast channel from the base station to acquire broadcast information (system information) in the cell.
  • the physical broadcast channel may be mapped to the seventh through ninth OFDM symbols in one subframe and transmitted in 10 subframe periods.
  • the terminal may receive a downlink reference signal (DL RS) in an initial cell search step to check the downlink channel state.
  • DL RS downlink reference signal
  • the UE After completing the initial cell search, the UE receives a physical downlink control channel (PDCCH) and a physical downlink control channel (PDSCH) according to the physical downlink control channel information in step S502. Specific system information can be obtained.
  • PDCCH physical downlink control channel
  • PDSCH physical downlink control channel
  • the terminal may perform a random access procedure (step Random Access Procedure), such as step S503 to step S506.
  • step Random Access Procedure the UE transmits a feature sequence as a preamble through a physical random access channel (PRACH) (S503), and through the physical downlink control channel and the corresponding physical downlink shared channel for the random access A response message may be received (S504).
  • PRACH physical random access channel
  • S505 additional physical random access channel transmission
  • PDCCH / PDSCH reception S506
  • a general downlink / uplink transmission / reception operation such as reception of a downlink signal (PDCCH / PDSCH) (S507) and uplink signal (PUCCH / PUSCH) transmission (S508) may be performed.
  • PDCH / PDSCH downlink signal
  • PUCCH / PUSCH uplink signal
  • PCFICH Physical Control Format Indicator Channel
  • a physical downlink control channel (PDCCH) and a physical downlink common channel (PDSCH) are multiplexed in a time division multiplexing (TDM) scheme on a downlink subframe in a 3GPP LTE system.
  • TDM time division multiplexing
  • the number of OFDM symbols used for PDCCH transmission may be changed for each TTI as the amount of physical transmission resources required according to the PDCCH transmission load on a certain downlink subframe is changed in units of subframes. Therefore, control information called a control format indicator (CFI) is defined to indicate the number of OFDM symbols used for PDCCH transmission, and dedicated for instructing the CFI to the receiving side (terminals) in every downlink subframe.
  • CFI control format indicator
  • a physical control format indicator channel (PCFICH) is used as the physical downlink channel.
  • PCFICH physical control format indicator channel
  • the UE since the number of OFDM symbols used for PDCCH transmission can be obtained through CFI, the UE can implicitly determine the position of the symbol where the PDSCH starts. Accordingly, the CFI value signaled from the base station functions to transmit the number of PDCCH transmit OFDM symbols to a user equipment in a certain downlink subframe on a specific downlink transmission carrier, and also performs PDCCH blind decoding on a specific downlink carrier. If not, the CFI value signaled from the base station may also mean that the terminal receiving the PDSCH reception start OFDM symbol for PDSCH reception / decoding for a subframe of the corresponding downlink carrier.
  • the PCFICH combines 16 control information transmission symbols through a predetermined encoding (e.g., simplex coding and iterative coding), scrambling, and modulation (e.g., QPSK) in the first OFDM symbol of an individual downlink subframe at full frequency.
  • 16 physical resource elements (ie, subcarriers) of a fixed position distributed in the region may be transmitted.
  • the PCFICH may be mapped to four resource element groups (16 resource elements except for a resource element on which a downlink reference signal is transmitted) of the first OFDM symbol of one subframe.
  • the value of the CFI transmitted through the PCFICH in the 3GPP LTE system generally has a value of 1, 2, or 3, and specifically, when the system band is 1.4 MHz, the CFI may have a value of 4.
  • PHICH Physical HARQ Indicator Channel
  • the PHICH is a downlink channel for transmitting HARQ ACK / NACK information for uplink transmission in a 3GPP LTE system.
  • the PHICH is mapped on 12 physical resource elements using a Walsh code of length 4 (using a Walsh code of the length SF 2 in the case of an extended CP).
  • PHICHs for a plurality of terminals may be multiplexed and transmitted in a code division multiplexing (CDM) / frequency division multiplexing (FDM) scheme through predetermined PHICH groups.
  • CDM code division multiplexing
  • FDM frequency division multiplexing
  • a PHICH duration parameter may be provided so that UEs can decode PDCCH control information transmitted through physical resources in the remaining control region except for the downlink reference signal, PCFICH and PHICH. have.
  • the PHICH duration is a parameter indicating the number of OFDM symbols used for PHICH transmission in the PDCCH transmission OFDM symbol region and is transmitted to the terminals through a primary broadcast channel (PBCH).
  • PBCH primary broadcast channel
  • CC component carriers
  • a bandwidth unit for example, 20 MHz
  • a conventional wireless communication system for example, LTE system
  • the bandwidth sizes of component carriers used for carrier aggregation may be the same or different.
  • Each component carrier also has a different frequency band (or center frequency).
  • each component carrier may exist on a continuous frequency band, component carriers existing on a discontinuous frequency band may be used for carrier aggregation.
  • bandwidth sizes of uplink and downlink may be symmetrically allocated or asymmetrically allocated.
  • the primary component carrier refers to a carrier used by a base station to exchange traffic and control signaling with a terminal.
  • the control signaling may include addition of a component carrier, configuration of a primary component carrier, an UL grant or a DL assignment.
  • a terminal belonging to the base station may be configured to have only one main component carrier. If the terminal operates in a single carrier mode, the main component carrier is used. Therefore, the main component carrier should be set to satisfy all the requirements for the exchange of data and control signaling between the base station and the terminal so that they can be used independently.
  • the main component carrier may be referred to as a scheduling CC or an anchor CC.
  • the secondary component carrier refers to an additional component carrier that can be activated or deactivated according to the amount of data transmitted and received.
  • the secondary component carrier may be set to be used only according to specific commands and rules received from the base station.
  • the secondary component carrier may be set to be used with the primary component carrier to support additional bandwidth.
  • a control signal such as an uplink grant or a downlink assignment may be received from the base station to the terminal through the activated secondary component carrier, and upstream of channel measurement information and a sounding reference signal (SRS) from the terminal to the base station. Control signals over the link may be transmitted.
  • the secondary component carrier may be referred to as a scheduled CC.
  • Resource allocation to the terminal may have a range of a primary component carrier and a plurality of secondary component carriers.
  • the system allocates secondary carriers asymmetrically to downlink and / or uplink based on system load (i.e. static / dynamic load balancing), peak data rate, or quality of service requirements. It may be.
  • RRC connection means that the terminal is allocated radio resources based on the RRC signaling exchanged between the RRC layer of the terminal and the network.
  • the terminal may be provided with configuration information on the primary component and the secondary component carrier from the base station.
  • the configuration information on the secondary carrier may include addition / deletion (or activation / deactivation) of the secondary carrier. Therefore, in order to activate the secondary component carrier or deactivate the existing secondary component carrier between the base station and the terminal it is necessary to perform the exchange of RRC signaling and MAC Control Element (MAC Control Element).
  • the activation or deactivation of the secondary component carrier may be determined by the base station based on quality of service (QoS), the load condition of the carrier and other factors.
  • the base station may instruct the UE to configure the secondary component carrier using a control message including information such as an indication type (activation / deactivation) for the downlink / uplink and a secondary component carrier list.
  • control information defined in the existing 3GPP LTE (release 10) system may be equally applied.
  • the CFI information through the PCFICH and the information of the PHICH duration parameter through the PBCH may be equally applied as the control information for the basic resource mapping of the PDCCH and the PHICH.
  • a unique downlink / uplink carrier linkage may be applied according to a class or capability of terminals.
  • a carrier association between a downlink or uplink component carrier transmitting PDSCH or PUSCH and a downlink component carrier transmitting PDCCH transmitting control information scheduling the same can be applied.
  • the above-mentioned carrier associations may be determined by any rule or standard provisioning rule, or the base station may perform higher-layer configuration of configuration information on such carrier association and perform RRC signaling (or MAC messaging or PDCCH in some cases). Signaling).
  • Such carrier association plays a role of designating a downlink or uplink component carrier on which control information such as PDCCH, PUCCH, downlink ACK / NACK, and uplink ACK / NACK are transmitted.
  • configuration information of carrier aggregation for uplink / downlink transmission and all settings related to the carrier association are based on UE-specific signaling and signaling (for example, RRC signaling through PDSCH). ) May also be terminal-specific.
  • the CFI and PHICH duration information on individual downlink component carriers configured in individual cells (or base stations) are information that is cell-specific and dynamically or semi-statically configured.
  • the UE When the configuration of the downlink configuration carrier for the terminal is changed, for example, when the number of configuration carriers is configured to increase, decoding of the appropriate downlink control channels on the newly configured downlink configuration carrier It is necessary to acquire the PHICH duration information to support the. In order to acquire the PHICH duration information, the UE needs to decode the PBCH on the newly configured downlink component carrier. In addition, since the position of the start symbol of the PDSCH in the secondary component carrier used for data transmission can be known from the CFI indicating the number of transmission symbols of the PDCCH transmitted through the primary component carrier, decoding of the PCFICH for the component carriers Is required.
  • PHICH duration setup and acquisition schemes to support efficient decoding.
  • Embodiments of the configuration of the CFI and PHICH duration information proposed in the present invention can be largely divided into four embodiments as shown in Table 1.
  • Embodiment 1 Component Carrier specific (independent) CFI Component Carrier specific PHICH duration
  • Embodiment 2 Component Carrier specific CFI Component Carrier common PHICH duration
  • Embodiment 3 Component Carrier common CFI Component Carrier common PHICH duration
  • Embodiment 4 Component Carrier common CFI Component Carrier specific PHICH duration
  • component carrier specific CFI refers to a method of independently setting a CFI value according to a situation for each downlink component carrier.
  • component carrier common CFI refers to a method of setting the same CFI value for all the downlink component carriers configured by the cell (or base station).
  • the UE sets the CFI values of the remaining component carriers as the CFI value obtained from the PCFICH of the main component carrier.
  • component carrier specific PHICH duration refers to a method of independently setting a PHICH duration value according to a situation for each downlink component carrier.
  • component carrier common PHICH duration means a method of setting the same PHICH duration value for all downlink component carriers configured by the cell (or base station). At this time, the UE sets the CFI values of the remaining component carriers as a PHICH duration value obtained from the P-BCH of the primary component carrier.
  • embodiments of the present invention propose schemes for configuring and signaling component carrier specific CFI and / or PHICH duration and schemes for configuring and signaling component carrier common CFI and / or PHICH duration.
  • Embodiment 1 of Table 1 is a scheme for enabling an optimized configuration according to individual configuration carriers in the configuration of PDCCH and PHICH in a predetermined downlink component carrier configured by a cell or a base station.
  • a complicated operation may be required in decoding of UEs for obtaining individual CFI values and PHICH duration values.
  • Embodiment 3 of Table 1 in contrast to Embodiment 1, provides the same CFI value and PHICH duration value across downlink component carriers configured by a given cell or base station, so that all or some of the component carriers
  • the UE In order to decode the transmitted PDCCH and PHICH, the UE is effective in obtaining the CFI value and the PHICH duration value in advance, and has an advantage of simplifying the operation of the UE.
  • the PDCCH and PHICH optimized for each downlink component carrier cannot be configured, inefficiency may exist in terms of downlink physical transmission resource utilization.
  • the CFI value of the corresponding downlink component carrier is decoded from the PCFICH or a specific transmission scheme (eg, For example, the CFI value of a specific downlink component carrier (as described above, the starting OFDM symbol position of the PDSCH to be decoded from the view of a receiver terminal can be determined through this value) may be used to determine the PDCCH or PDSCH of another downlink component carrier (
  • the decoding of the CFI value by RRC signaling is regarded as a natural operation of the terminal, and therefore, using a component carrier-specific CFI scheme does not significantly cause the complexity and delay of the operation of the terminal.
  • PHICH duration information is configured in a component carrier common scheme. Accordingly, the PHICH duration information is set to be identical on downlink component carriers configured by a predetermined cell or base station, and the terminal is configured by the primary component carrier (or anchor component carrier) or component carrier designation which is detected and connected thereto.
  • the primary component carrier can be operated to obtain a common PHICH duration parameter for all component carriers. Accordingly, according to the second embodiment, it is possible to induce effective information acquisition of the terminal.
  • the terminal is common to all component carriers through the main component carrier (or anchor component carrier) to which it is detected and connected or through the main component carrier set by the component carrier designation.
  • the PHICH duration is a scheme to enable a configuration optimized for each configuration carrier according to the situation.
  • the following embodiments propose a PHICH duration information signaling scheme.
  • the following embodiments can be configured in combination with various ways in which CFI information is transmitted (eg, component carrier specific or component carrier common scheme).
  • the PHICH duration information is control information transmitted through the PBCH.
  • a primary synchronization signal / secondary synchronization signal on a downlink component carrier on which a PBCH is transmitted is detected and downlink. This involves the process of reference signal measurement.
  • the base channel is transmitted in a 40ms period in PBCH transmission, a considerable delay, operation complexity, and effort are required for the UE to acquire control information through PBCH decoding.
  • PHICH duration information of a newly allocated downlink component carrier is received.
  • a method of obtaining is required.
  • Carrier allocation may be made UE-specific, UE group-specific, cell-specific, or cell cluster-specific.
  • carrier allocation may be provided through L1 / L2 control signaling (ie, control signaling using a predetermined PDCCH), MAC messaging, or higher layer signaling (eg, RRC signaling).
  • L1 / L2 control signaling ie, control signaling using a predetermined PDCCH
  • MAC messaging eg, MAC messaging
  • RRC signaling higher layer signaling
  • the measured component carrier may be a component carrier that is configured by the serving base station to which the terminal currently belongs and does not have a carrier set to the terminal, or a component carrier that is not configured by the serving base station and has no carrier set to the terminal. You can also do
  • the terminal When the terminal performs the measurement for the component carrier in the form periodically set before the carrier assignment for itself or event-driven based on the signaling from the cell base station, the main synchronization signal / While performing the same process of detecting the floating signal and measuring the downlink reference signal, it is possible to decode the PBCH of the corresponding component carrier to obtain PHICH duration information.
  • a signaling method of PHICH duration information of a corresponding cell or base station is different from a signaling method in a single component carrier. You can do it. That is, the signaling method of the PHICH duration information of the corresponding cell or base station is the same as in the case of single carrier transmission of the existing 3GPP LTE system, but the main synchronization signal, the floating signal, and the downlink reference signal in terms of measuring any component carrier of the UE. In terms of specifying decoding of the PBCH for each measurement through the UE, it has a difference from the existing neighbor cell measurement scheme.
  • the present invention in a situation where PHICH duration information for a downlink component carrier is signaled through a PBCH, predetermined UE-specific or cell-specific RRC signaling or UE-specific or cell-specific L1 / L2 control signaling (ie, The present invention relates to a method of effectively transmitting PHICH duration control information to a terminal (s) using a predetermined format of PDCCH.
  • RRC signaling means signaling the PHICH duration information as a series of system information, and may be performed by UE-specific, UE group-specific, cell-specific or cell cluster specific.
  • the RRC signaling of another purpose may be included in the RRC signaling used when signaling the PHICH duration information to the terminal (s) and may be signaled together.
  • the RRC signaling includes, for example, control information including a downlink component carrier for transmitting data / control information to a corresponding UE, or control information for setting a downlink component carrier for monitoring / measurement. May be included together.
  • reception start OFDM symbol position information for the UE to receive / decode PDSCH may be transmitted on the component carrier.
  • the L1 / L2 control signaling may be made UE-specific, UE group-specific, cell-specific or cell cluster specific.
  • the L1 / L2 control signaling for the PHICH duration may be signaled together in the PDCCH Downlink Control Information (DCI) format or the information of the dedicated physical control channel for the L1 / L2 control signaling for another purpose.
  • the L1 / L2 control signaling includes, for example, scheduling L1 / L2 control information signaling or monitoring (eg, PDCCH blind), including downlink component carrier configuration for data / control information transmission to a corresponding UE.
  • L1 / L2 control information for configuring a downlink component carrier for decoding) or measurement purposes may be included together.
  • reception start OFDM symbol position information for the UE to receive / decode PDSCH may be transmitted on the component carrier.
  • reception start OFDM symbol location information for receiving / decoding PDSCH on the component carrier is UE-specific or cell. It may be transmitted through specific RRC signaling.
  • the RRC signaling or the L1 / L2 control signaling scheme of the PHICH duration information may be equally applied to the signaling of other control information other than the PHICH duration information.
  • new RRC signaling for signaling one or more or all of the PHICH duration information and other control information may be defined, and an RRC parameter group corresponding thereto may be defined.
  • a new PDCCH DCI format payload design or dedicated physical control channel for signaling one or more or all of the PHICH duration information and other control information may be defined and used.
  • such other control information is also included in the L1 / L2 control signaling for data transmission, or in the L1 / L2 control signaling for allocating a downlink component carrier for monitoring (e.g., PDCCH blind decoding) or measurement. Can be sent together.
  • the physical channel transmitting the PHICH duration information and the CFI value control information proposed in the first half of the present invention is a transmission scheme on a UE-specific or cell-specific multiple transport carrier and control information is applied in a situation where cross-carrier scheduling is applied.
  • a downlink component carrier or a downlink component carrier different from the downlink component carrier associated with the uplink component carrier may be transmitted to the corresponding UE.
  • control information other than PHICH duration information that may be transmitted according to the proposed scheme as above are as follows.
  • the configuration of the downlink or uplink physical transmission antenna (for example, the number of antennas) can be set differently to the configuration carrier specification, the downlink physical transmission antenna configuration and / or uplink physical transmission of the configuration carrier Information on the transmission antenna configuration may be included in the other control information.
  • the configuration and / or configuration of the downlink antenna port of the corresponding component carrier Information on the configuration of the uplink antenna port may be included in the other control information.
  • the antenna port may correspond to a corresponding individual transmission antenna or layer and may have a meaning of a reference signal pattern applied to the antenna port.
  • the downlink antenna port, the antenna port for the cell-specific reference signal (CRS) defined in the existing 3GPP LTE (release 8 or 9) system and the channel state information newly defined in the 3GPP LTE-A (release 10) system It may be defined by being divided into an antenna port for a channel status information-reference signal (CSI-RS).
  • CSI-RS channel status information-reference signal
  • configuration information on one or both of the two antenna ports divided into CRS and CSI-RS may be signaled.
  • the CSI-RS transmission configuration control information may be configured as described above. It may be included in other control information.
  • the target frequency band of the CSI-RS may be different for each component carrier.
  • the target frequency band of the CSI-RS may be the entire system bandwidth, or may be a partial bandwidth of the entire system bandwidth.
  • bandwidth configuration information for each component carrier may be included in the other control information.
  • uplink channel sounding RS configuration information may be included in the other control information.
  • control information ie, activation information of the dynamic triggered SRS
  • the control information for indicating whether to configure whether the dynamic channel sounding reference signal is applied for each uplink component carrier may be included in the other control information.
  • the other control information may include control information for designating a downlink component carrier on which a PDCCH for scheduling a corresponding PDSCH or a PUSCH is transmitted with respect to a downlink component carrier or an uplink component carrier configured or configured to transmit a PUSCH.
  • Whether the PDCCH blind decoding is individually performed or the PDCCH DCI format (or size) information to be searched when the PDCCH blind decoding is performed on downlink component carriers configured or configured for a specific UE may be included in the other control information.
  • the control information for designating a maximum value of the PDCCH blind decoding count on the corresponding component carrier for downlink component carriers on which the corresponding terminal performs the PDCCH blind decoding may be included in the other control information.
  • a method of signaling PHICH duration information as an RRC parameter for the UE (s) during higher layer signaling (RRC signaling) for carrier allocation may be configured as follows.
  • the configuration (for example, the number) of physical antennas used for each component carrier is different from or in addition to the PHICH duration information
  • the information on the number of transmit antennas is used as an RRC parameter in RRC signaling for a predetermined carrier allocation. It may be included and signaled.
  • information on the number of antenna ports used is RRC signaling for a predetermined carrier allocation. May be included and signaled as an RRC parameter.
  • a method of including PHICH duration information in the DCI format payload as control information for the terminal (s) during L1 / L2 control signaling using a PDCCH for carrier assignment may be configured as follows.
  • the configuration e.g., the number
  • information on the number of transmit antennas is determined when L1 / L2 control signaling for a predetermined carrier allocation. It may be included in the DCI format payload as control information for the terminal (s).
  • the information on the number of antenna ports used is L1 / for a predetermined carrier allocation. It may be included in the DCI format payload as control information for the terminal (s) during L2 control signaling.
  • FIG. 7 is a view for explaining the configuration of the base station apparatus and the terminal apparatus according to an embodiment of the present invention.
  • the base station apparatus 710 includes a physical layer module 711, a medium access control (MAC) layer module 712, a radio resource control (RRC) layer module 713, a processor 714, and a memory. 715 and antenna 716.
  • MAC medium access control
  • RRC radio resource control
  • the physical layer module 711 maps the transport channel from the MAC layer module 712 to the downlink physical channel, and transmits it to the terminal.
  • the physical layer module 712 receives and processes the uplink physical channel from the terminal. ) Can be delivered. Control information and data are moved through a physical channel between a physical layer of a transmitting side (eg, a base station) and a receiving side (eg, a terminal).
  • the MAC layer module 712 is connected to a radio link control (RLC) layer, which is a higher layer, through a logical channel.
  • RLC radio link control
  • the RRC layer module 713 performs control functions of logical channels, transport channels, and physical channels in association with configuration, reconfiguration, and release of radio bearers (RBs).
  • RB means a service provided by a second layer (MAC layer, RLC layer, PDCP layer) for data transmission between the terminal and the base station.
  • the RRC layer module 713 exchanges RRC messages between the base station and the terminal.
  • RRC Connected RRC Connected
  • the antenna 716 may be composed of a single antenna or a plurality of antennas. When a plurality of antennas are configured on at least one of a transmitting side (base station) and a receiving side (terminal), it may support MIMO transmission.
  • a base station 710 for transmitting multicarrier related control information to a terminal 720 will be described.
  • the processor 714 may control the physical layer module 711 to transmit a physical control format indicator channel (PCFICH) and a physical downlink control channel (PDCCH) for multiple carriers.
  • the processor 714 may control to transmit physical HARQ indicator channel (PHICH) duration information for the multicarrier through control signaling from the base station 710 to the terminal 720.
  • the control signaling may be one or more of RRC signaling or L1 / L2 control signaling, the RRC signaling is transmitted through the radio resource control layer module 713, and the L1 / L2 control signaling is transmitted through the physical layer module 711.
  • the CFI information and PHICH duration information transmitted from the base station 710 may be used for PDCCH decoding of the terminal 720 and acquiring control information for the multicarrier.
  • the processor 714 of the base station 710 performs a function of processing the information received by the base station 710, information to be transmitted to the outside, and the memory 715 stores the processed information and the like for a predetermined time. It may be replaced by a component such as a buffer (not shown).
  • the terminal device 720 includes a physical layer module 721, a MAC layer module 722, an RRC layer module 723, a processor 724, a memory 725, and an antenna 726. It may include.
  • the physical layer module 721 maps the transport channel from the MAC layer module 722 to the uplink physical channel and transmits the same to the base station, receives the downlink physical channel from the base station, processes the MAC layer module 722 through the transport channel. ) Can be delivered.
  • the RRC layer module 723 performs control functions of logical channels, transport channels, and physical channels in association with configuration, reconfiguration, and release of RBs.
  • RB means a service provided by a second layer (MAC layer, RLC layer, PDCP layer) for data transmission between the terminal and the base station.
  • MAC layer MAC layer, RLC layer, PDCP layer
  • the RRC layer module 723 exchanges RRC messages between the base station and the terminal.
  • the antenna 726 may be composed of a single antenna or a plurality of antennas. When a plurality of antennas are configured on at least one of a transmitting side and a receiving side, multiple input multiple output (MIMO) transmission may be supported.
  • MIMO multiple input multiple output
  • a terminal 720 receiving multicarrier related control information from a base station 710 will be described.
  • the processor 724 of the terminal 720 receives a physical control format indicator channel (PCFICH) and a physical downlink control channel (PDCCH) for a multicarrier, and acquires control format indicator (CFI) information from the PCFICH.
  • PCFICH physical control format indicator channel
  • PDCCH physical downlink control channel
  • CFI control format indicator
  • Module 721 may be controlled.
  • the processor 724 may control to receive physical HARQ indicator channel (PHICH) duration information for the multicarrier through control signaling from the base station 710 to the terminal 720.
  • PHICH physical HARQ indicator channel
  • control signaling may be one or more of RRC signaling or L1 / L2 control signaling
  • the RRC signaling is received through the radio resource control layer module 723
  • the L1 / L2 control signaling is received through the physical layer module 721.
  • the processor 724 may control the physical layer module 721 to decode the PDCCH using CFI information and PHICH duration information to obtain control information for the multicarrier.
  • the processor 724 of the terminal device 720 performs a function of processing the information received by the terminal device 720, information to be transmitted to the outside, etc., and the memory 725 stores the processed information and the like for a predetermined time. And may be replaced by a component such as a buffer (not shown).
  • Embodiments of the present invention described above may be implemented through various means.
  • embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
  • a method according to embodiments of the present invention may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), and Programmable Logic Devices (PLDs). It may be implemented by field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs field programmable gate arrays
  • processors controllers, microcontrollers, microprocessors, and the like.
  • the method according to the embodiments of the present invention may be implemented in the form of a module, a procedure, or a function that performs the functions or operations described above.
  • the software code may be stored in a memory unit and driven by a processor.
  • the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
  • Method and apparatus for transmitting / receiving control information on a component carrier are available in a mobile communication system or a wireless communication industry supporting multiple carriers.

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

Abstract

La présente invention concerne un système de communication sans fil, ainsi qu'un procédé et un appareil d'émission et de réception d'informations de commande dans un système multiporteuse. Selon un mode de mise en oeuvre de cette invention, un procédé s'appliquant à un terminal de réception d'informations de commande en relation avec une multiporteuse et provenant d'une station de base comprend les étapes consistant à : recevoir des informations de commande d'indicateur de format (CFI) sur une multiporteuse; recevoir des informations de durée d'un canal physique d'indicateur (PHICH) sur la multiporteuse; recevoir un canal physique de commande en liaison descendante (PDCCH) sur la multiporteuse, et obtenir des informations de commande sur la multiporteuse par décodage du canal physique de commande en liaison descendante avec les informations CFI et les informations de durée de PHICCH, les informations de durée de PHICCH pouvant être reçues par l'intermédiaire d'un signal de commande provenant de la station de base.
PCT/KR2010/003514 2009-06-02 2010-06-01 Procédé et appareil d'émission et de réception d'informations de commande dans un système multiporteuse WO2010140825A2 (fr)

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WO2011147340A1 (fr) * 2010-06-30 2011-12-01 华为技术有限公司 Procédé et dispositif permettant de déterminer une durée de symbole de canal de commande physique de liaison descendante
WO2012169744A3 (fr) * 2011-06-08 2013-03-07 엘지전자 주식회사 Procédé et dispositif permettant une transmission d'informations dans un système de communication sans fil
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WO2013139211A1 (fr) * 2012-03-19 2013-09-26 电信科学技术研究院 Procédé et dispositif pour déterminer des ressources d'un epdcch
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WO2013165199A1 (fr) * 2012-05-02 2013-11-07 Samsung Electronics Co., Ltd. Procédé pour assurer la continuité de transmission d'une procédure harq sur la liaison montante dans un système tdd dynamique
WO2014069967A1 (fr) * 2012-11-05 2014-05-08 엘지전자 주식회사 Procédé et appareil pour générer un signal synchrone dans un système d'accès sans fil destiné à prendre en charge la bande des supra-hautes fréquences
WO2014069966A1 (fr) * 2012-11-05 2014-05-08 엘지전자 주식회사 Procédé et dispositif de génération de signal de synchronisation dans un système d'accès sans fil supportant une bande de fréquence décimétrique
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CN111585736A (zh) * 2017-05-08 2020-08-25 上海朗帛通信技术有限公司 一种基站、用户设备中的用于无线通信的方法和装置
CN111585736B (zh) * 2017-05-08 2022-04-19 极光技术咨询有限责任公司 一种基站、用户设备中的用于无线通信的方法和装置

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