WO2013008987A1 - Procédé et dispositif de transmission de données de commande par l'intermédiaire d'un canal de commande de liaison descendante physique dans un système de télécommunication sans fil - Google Patents

Procédé et dispositif de transmission de données de commande par l'intermédiaire d'un canal de commande de liaison descendante physique dans un système de télécommunication sans fil Download PDF

Info

Publication number
WO2013008987A1
WO2013008987A1 PCT/KR2012/001254 KR2012001254W WO2013008987A1 WO 2013008987 A1 WO2013008987 A1 WO 2013008987A1 KR 2012001254 W KR2012001254 W KR 2012001254W WO 2013008987 A1 WO2013008987 A1 WO 2013008987A1
Authority
WO
WIPO (PCT)
Prior art keywords
information
control information
pdcch
downlink
dci
Prior art date
Application number
PCT/KR2012/001254
Other languages
English (en)
Korean (ko)
Inventor
최혜영
이현우
손혁민
한승희
김진민
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2013008987A1 publication Critical patent/WO2013008987A1/fr

Links

Classifications

    • 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 scheduling signals in a multi-carrier supporting wireless communication system.
  • Wireless communication systems are widely deployed to provide various kinds of communication services such as voice and data.
  • a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
  • multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (0FDMA) systems, and single carrier (SC-FDMA) systems.
  • 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 (MC) system MC-FDMA (mult i carrier frequency division multiple access) system.
  • An object of the present invention is to reduce the size of downlink control information.
  • the technical problems to be achieved in the present invention are the technical Other technical problems which are not limited to the above, and which are not mentioned, will be clearly understood by those skilled in the art from the following description.
  • a first technical aspect of the present invention is a method for transmitting control information through a physical downlink control channel (PDCCH) by a base station in a wireless communication system, the starting point information and length of a continuous resource block (RB) Generating a resource indication value using information, wherein a scale factor determined according to a system bandwidth is applied to the starting point information and the length information; Generating downlink control information (DCI) including the resource indication value and used for uplink authorization; And transmitting the DCI through the PDCCH.
  • PDCCH physical downlink control channel
  • RB continuous resource block
  • a second technical aspect of the present invention is a method of receiving control information via a physical downlink control channel (PDCCH) in a wireless communication system, comprising: PDCCH candidates for the control information in a downlink subframe from a base station Attempting decoding with respect to a search space consisting of a set according to Downlink Control Information (DCI) format used for uplink authorization; And deriving starting point information and length information to which the scale factor determined according to the system bandwidth is applied from the obtained resource indication value when the decoding attempt is successful, thereby determining a continuous resource block to be used for the physical uplink public channel (PUSCH).
  • DCI Downlink Control Information
  • a base station is physically downward in a wireless communication system.
  • An apparatus for transmitting control information via a link control channel (PDCCH) comprising: a transmission module; And a processor, wherein the processor is consecutive resource blocks (R esource Block, RB) start point information and but-length by using the information to generate a resource indication, the start point information and the length information, the scale determined by the system bandwidth of The factor is applied and includes the resource indication value, and generates an apparatus for downlink control information (Downlink Control Information, DCI) used for uplink approval.
  • PDCCH link control channel
  • a fourth technical aspect of the present invention is an apparatus for receiving control information via a physical downlink control channel (PDCCH) in a wireless communication system, comprising: reception modules; And a processor, wherein the processor attempts to decode according to a Downlink Control Information (DCI) format used for uplink authorization for a search space formed of a set of PDCCH candidates for the control information. Determining successive resource blocks to be used for a physical uplink shared channel (PUSCH) by deriving start point information and length information to which a scale factor determined according to a system bandwidth is applied from the obtained resource indication value when the decoding attempt is successful. To provide a device.
  • the resource indication value may be generated by further using the number of RBs of the system bandwidth to which the scale factor is applied.
  • the scale factor may be an inverse of the number of RBs determined according to the system bandwidth.
  • each of the starting point information and the length information may be determined as an integer multiple of the inverse of the scale factor.
  • the resource indication value is a resource allocation corresponding to the uplink grant. It may be for informing the terminal of the continuous resource blocking.
  • the method may further include generating a downlink resource indication value indicating a downlink scheduling assignment using the resource indication value generating step; Generating a DCI including the downlink resource indication value and having a format used for a random access procedure; And transmitting the DCI through the PDCCH.
  • the PDCCH may be mapped on time-frequency resources except for the first N (N ⁇ 4) OFDM symbols of a downlink subframe.
  • the size of the downlink control information can be reduced, the usable capacity of the physical downlink control channel can be increased.
  • 1 is a diagram illustrating a structure of a radio frame used in a 3GPP LTE system.
  • 2 is a diagram illustrating a resource grid in a downlink slot.
  • 3 is a diagram illustrating a structure of an uplink subframe.
  • 4 is a diagram illustrating a structure of a downlink subframe.
  • 5 is a diagram illustrating a terminal specific search space at each aggregation level.
  • 6 is a diagram for explaining carrier aggregation.
  • FIG. 7 is a diagram for describing cross carrier scheduling.
  • 8 and 9 are diagrams for explaining a method that can be used when exchanging scheduling information between base stations.
  • 10 illustrates a time-frequency resource allocated for an ePDCCH.
  • 11 is a diagram for explaining generation of resource indication values.
  • FIG. 12 is a diagram sequentially illustrating a process of generating a resource indication value.
  • 13 is a diagram showing the configuration of a preferred embodiment of a base station apparatus or a terminal apparatus according to the present invention.
  • each component or feature may be considered optional unless stated otherwise.
  • Each component or feature may be embodied in a form that is not combined with other components or features.
  • some of the 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 configurations or features of one embodiment may be included in another embodiment or may be substituted for components or features of another embodiment.
  • embodiments of the present invention provide data transmission between a base station and a terminal. It demonstrates centering around reception relationship.
  • the base station has a meaning as a terminal node of the network that directly communicates with the terminal. Certain operations described in this document as being performed by a base station may be performed by an upper node of a 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), and an access point (AP).
  • eNB eNode B
  • AP access point
  • base station may be used as a concept including a cell or a sector.
  • the repeater may be replaced by terms such as Relay Node (RN), Relay Station (RS).
  • 'terminal' may be replaced with terms such as a user equipment (UE), an obile station (MS), a mobile subscriber station (SS), and a subscriber station (SS).
  • UE user equipment
  • MS obile station
  • SS mobile subscriber station
  • SS subscriber station
  • Embodiments of the present invention are directed to at least one of wireless access systems such as IEEE 802 system, 3GPP system, 3GPP LTE and LTE-A (LTE-Avanced) system and 3GPP2 system. It may be supported by the disclosed standard documents. 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 this document may be described by the above standard document.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • C ⁇ can be implemented with radio technologies such as UTR / Universal J Terrestrial Radio Access) or CDMA2000.
  • TDMA can be implemented with wireless technologies such as the GSMC Global System for Mobile Communications (GPRS) / Gene ra 1 Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolut ion (EDGE).
  • GPRS Global System for Mobile Communications
  • GPRS Gene ra 1 Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolut ion
  • 0FDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (ffiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), and the like.
  • UTRA is part of UMTSCUniversal Mobile Telecommunications System.
  • E-UMTS Evolved UMTS
  • 3GPP LTEdong term evolution (3GPP) ⁇ -E-UTRA it adopts 0FDMA in downlink and SC-FDMA in uplink.
  • LTE-M Advanced is the evolution of 3GPP LTE.
  • 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).
  • 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).
  • WiMAX can be described by the IEEE
  • 1 (a) is a diagram showing the structure of a radio frame used in the 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 ( ⁇ ).
  • ⁇ Transmission Time Interval
  • one subframe may have a length of 1 ms
  • 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 0FDMA scheme in downlink, the OFDM symbol represents one symbol length (period).
  • 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 0FDM symbols included in one slot may be changed in various ways.
  • Figure 1 (b) illustrates the structure of a type 2 radio frame.
  • Type 2 radio frames consist of two half frames. Each half frame consists of five subframes, a Downlink Pilot Time Slot (DwPTS), a Guard Period (GP), and an UpPTSCUplink Pilot Time Slot (1), of which one subframe consists of two slots.
  • DwPTS is used for initial cell search, synchronization, or channel estimation at the terminal. UpPTS matches the channel estimation in the base station with the uplink transmission synchronization of the terminal. Used to add weight.
  • the guard period is a period for removing interference caused in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
  • the structure of the radio frame is merely an example, and the number of subframes included in the radio frame or the number of slots included in the subframe may be variously changed. Slot structure
  • 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, the present invention is not limited thereto.
  • one slot may include 7 OFDM symbols, whereas in case of an extended CP, one slot may include 6 OFDM symbols.
  • Each element on the resource grid is called a resource element (RE).
  • One resource block includes 12 X7 resource elements.
  • the number of NDLs 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 that of the downlink slot.
  • UL subframe structure may be the same as that of the downlink slot.
  • the uplink subframe may be divided into a control region and a data region in the frequency domain.
  • a physical uplink control channel including uplink control information in the control region (Physical Uplink Control Channel (PUCCH) is allocated.
  • PUSCH physical uplink shared channel
  • 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.
  • the resource block pair allocated to the PUCCH is said to be frequency-hopped at the slot boundary.
  • PDSCH Physical Downlink Shared Chancel
  • 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), a physical HARQ indicator channel ( Physical Hybrid automatic repeat request Indicator Channel (PHICH).
  • PCFICH physical control format indicator channel
  • PDCCH physical downlink control channel
  • PHICH Physical Hybrid automatic repeat request Indicator Channel
  • the PCFICH is transmitted in the first 0FDM symbol of a subframe and includes information on the number of 0FDM symbols used for control channel transmission in the subframe.
  • the PHICH includes a HARQ ACK / NACK signal as a response of uplink transmission.
  • the PDCCH includes uplink or downlink scheduling information and power control information.
  • the control information transmitted through the PDCCH is called downlink control information (DCI).
  • the DCI includes uplink or downlink scheduling information or an uplink transmit power control command for any terminal group.
  • the PDCCH includes a resource allocation and transmission format of a DL shared channel (DL-SCH), resource allocation information of an uplink shared channel (UL-SCH), paging information of a paging channel (PCH), system information on a DL-SCH, and a PDSCH.
  • Resource allocation of upper layer control messages such as random access responses transmitted over the network, a set of transmit power control commands for individual terminals in a group of terminals, transmission power control information, and activation of VoIPCVoice over IP). And the like.
  • DCI formats 0, 1, 1A, IB, 1C, 1D, 2, 2A, 2B, 2C, 3, 3A, and 4 are defined.
  • DCI formats 0, 1A, 3, and 3A are defined to have the same message size in order to reduce the number of blind decoding times described later.
  • DCI formats are DCI formats 0, 4, ⁇ ) DCI formats 1, 1A, IB, 1C, ID, used for downlink scheduling assignment, according to the purpose of control information to be transmitted. 2, 2A, 2B, 2C, and iii) DCI formats 3 and 3A for power control commands.
  • DCI format 0 used for uplink scheduling grant
  • a carrier indicator necessary for carrier aggregation to be described later an indicator used to distinguish DCI formats 0 and 1A (flag for format 0 / format 1A differentiation)
  • Prize A frequency hoping flag indicating whether frequency hopping is used in the downlink PUSCH transmission
  • information on resource block assignment that the UE should use for PUSCH transmission information on resource block assignment that the UE should use for PUSCH transmission
  • modulation and coding schemes information on resource block assignment that the UE should use for PUSCH transmission
  • a modulation and coding scheme used for modulation and coding schemes.
  • DCI format 0 uses synchronous HARQ, it does not include a redundancy version as DCI formats related to downlink scheduling allocation. For the carrier indicator, if cross carrier scheduling is not used, it is not included in the DCI format.
  • DCI format 4 is new in LTE-A Release 10 and is intended to support spatial multiplexing for uplink transmission in LTE-A.
  • DCI format 4 since it further includes information for spatial multiplexing as compared with DCI format 0, it has a larger message size, and further includes additional control information in control information included in DCI format 0. That is, the DCI format 4 further includes a modulation and coding scheme for a second transport block, precoding information for multi-antenna transmission, and sounding reference signal request (SRS request) information.
  • SRS request sounding reference signal request
  • DCI formats 1, 1A, IB, 1C, 1D, 2, 2A, 2B, and 2C related to downlink scheduling assignment do not support spatial multiplexing with 1, 1A, IB, 1C, and 1D. It can be divided into 2, 2k, 2B, 2C to support.
  • DCI format 1C supports only frequency continuous allocation as a compact downlink assignment and does not include a carrier indicator and a redundant version as compared to other formats.
  • DCI format 1A is a format for downlink scheduling and random access procedures. This includes carrier indicators, indicators indicating whether downlink distributed transmission is used, PDSCH resource allocation information, modulation and coding schemes, redundancy versions, HARQ processor numbers to inform processors used for soft combining,
  • the HARQ process may include a new data indicator used to empty the buffer for initial transmission, a transmit power control command for PUCCH, and an uplink index required for TDD operation.
  • DCI format 1 In the case of DCI format 1, most of the control information is similar to DCI format 1A. However, compared to DCI format 1A related to continuous resource allocation, DCI format 1 supports discontinuous resource allocation. Therefore, since DCI format 1 further includes a resource allocation header, the control signaling overhead is somewhat increased as a trade-off of increasing flexibility of resource allocation.
  • the DCI format IB and ID are common in that they contain precoding information as compared with DCI format 1.
  • DCI format 1B includes PMI verification and DCI format 1D includes downlink power offset information.
  • the control information included in the DCI format IB and ID is mostly identical to that of the DCI format 1A.
  • DCI formats 2, 2A, 2B, and 2C basically include most of the control information included in DCI format 1A, and further include information for spatial multiplexing. This includes modulation and coding schemes for the second transmit block, new data indicators and redundancy servers. This is the case.
  • DCI format 2 supports closed-loop spatial multiplexing, and 2A supports open-loop spatial multiplexing. Both contain precoding information.
  • DCI format 2B supports dual layer spatial multiplexing combined with beamforming and further includes cyclic shift information for DMRS.
  • DCI format 2C can be understood as an extension of DCI format 2B and supports spatial multiplexing up to eight layers.
  • DCI formats 3 and 3A can be used to supplement transmit power control information included in DCI formats for uplink scheduling grant and downlink scheduling assignment, that is, to support semi-persistent scheduling. have.
  • DCI format 3 1 bit per terminal and 2 bit instructions for 3A are used.
  • Any one of the above-described DCI formats may be transmitted through one PDCCH, and a plurality of PDCCHs may be transmitted in a control region.
  • cyclic redundancy check is performed on DCI.
  • CRC Redundancy Check
  • RNTI radio network temporary identifier
  • the RNTI may use different RNTIs according to the purpose of transmitting the DCI.
  • the P-RNTI is used for a paging message related to network initiated connection establishment
  • the RA-RNTI is used for random access
  • the SI-RNTI is used for a system information block (SIB).
  • SIB system information block
  • C-RNTI which is a unique terminal identifier, may be used.
  • DCI with CRC is small It is coded with a positive code and then adjusted for the amount of resources used for transmission through rate-matching.
  • a control channel element which is a continuous logical allocation unit, is used when mapping the PDCCH to the REs for efficient processing.
  • the CCE consists of 36 REs, which corresponds to 9 units in a resource element group (REG).
  • the number of CCEs required for a specific PDCCH depends on the DCI payload, cell bandwidth, channel coding rate, and the like, which are control information sizes. In more detail, the number of CCEs for a specific PDCCH may be defined according to the PDCCH format as shown in Table 1 below.
  • the number of CCEs varies according to the PDCCH format.
  • the transmitting side may use the PDCCH format 0 and change the PDCCH format to 2 when the channel condition worsens. have.
  • any one of four formats may be used for the PDCCH, which is not known to the UE. Therefore, from the terminal's point of view Decoding must be performed without knowing the PDCCH format, which is called blind decoding. However, since it is a heavy burden for the UE to decode all possible CCEs used for downlink for each PDCCH format, a search space is defined in consideration of the scheduler limitation and the number of decoding attempts.
  • the search space is a set of candidate PDCCHs consisting of CCEs that the UE should attempt to decode on an aggregation level.
  • the aggregation level and the number of PDCCH candidates may be defined as shown in Table 2 below.
  • the terminal since four aggregation levels exist, the terminal has a plurality of search spaces according to each aggregation level.
  • the search space may be divided into a terminal specific search space and a common search space.
  • the UE-specific discovery space is for specific UEs, and each UE monitors the UE-specific discovery space (attempting to decode the PDCCH candidate set according to the possible DCI format) to identify the RNTI and CRC masked on the PDCCH. If valid, the control information can be obtained.
  • the common search space is for dynamic scheduling of system information or a case where a plurality of terminals or all terminals need to receive a PDCCH.
  • the common search space may be used for a specific terminal for resource management.
  • the common search space may be overlaid with the terminal specific search space.
  • the search space may be specifically determined by Equation 1 below.
  • K is always determined to be zero.
  • Equation 1 Represents a positive search space (shaded part). Carrier merge is not used here.
  • Figure 5 puts out that to 32 illustrate, for convenience of explanation (a), (b), (c), (d) the person seut said and illustrated, each set of level 1, in the case of the 2, 4, 8 CCE Indicates a number.
  • the start CCE of the search space at each aggregation level is determined by the RNTI and the subframe number k as described above, and may be determined differently for each aggregation level due to the modulo function in the same subframe for one UE. Can always be determined as a multiple of the aggregation level. ⁇ below
  • k is assumed to be CCE number 18 by way of example.
  • the UE attempts decoding sequentially in units of CCEs determined according to a corresponding aggregation level. For example, in (b) of FIG. 5, the UE attempts to decode two CCE units according to the aggregation level from CCE No. 4, which is a starting CCE.
  • the UE attempts to decode the search space, and the number of decoding attempts is determined by a transmission mode determined through DCI format and RRC signaling.
  • the UE should consider two DCI sizes (DCI format 0 / 1A / 3 / 3A and DCI format 1C) for each of six PDCCH candidates for the common search space. Decryption attempt is necessary.
  • a sal may be understood as a combination of downlink resources and uplink resources.
  • the uplink resource is not an essential element, and thus, the cell may consist of only the downlink resource, or the downlink resource and the uplink resource. However, this is the definition in the current LTE-A Release 10 and vice versa, that is, the cell may be made up of uplink resources alone.
  • the downlink resource may be referred to as a downlink component carrier (DL CC) and the uplink resource may be referred to as an uplink component carrier (UL CC).
  • DL CC and UL CC may be represented by a carrier frequency (carrier frequency), the carrier frequency means a center frequency (center frequency) in the cell.
  • a cell may be classified into a primary cell (PCell) operating at a primary frequency and a secondary cell (SCell) operating at a secondary frequency.
  • PCell and SCell may be collectively referred to as a serving cell.
  • the terminal may perform an initial connection establishment (initial connection establishment) process, or the cell indicated in the connection reset process or handover process may be a PCell. That is, the PCell may be understood as a cell that is the center of control in a carrier aggregation environment to be described later.
  • the terminal is in its PCell PUCCH can be allocated and transmitted.
  • the SCell is configurable after the RRC connection is established and can be used to provide additional radio resources.
  • the remaining serving cells except the PCell may be viewed as SCells.
  • SCells In case of a terminal in RRC_CONNECTED state, but carrier aggregation is not configured or carrier aggregation is not supported, there is only one serving cell composed of PCell.
  • the network may configure one or more SCells in addition to the PCeU initially configured in the connection establishment process after the initial security activation process is initiated.
  • Carrier aggregation is a technology introduced in LTE-A that allows the use of wider frequency bands to meet the increasing demand for higher data rates.
  • Carrier aggregation may be defined as an aggregation of two or more component carriers (CCs) having different carrier frequencies.
  • FIG. 6 (a) shows a subframe when one CC is used in an existing LTE system
  • FIG. 6 (b) shows a subframe when carrier aggregation is used.
  • FIG. 6B three CCs of 20 MHz are used to support a total bandwidth of 60 MHz.
  • each CC may be continuous or may be non-continuous.
  • the UE may simultaneously receive and monitor downlink data through a plurality of DL CCs.
  • the linkage between each DL CC and UL CC may be indicated by system information.
  • DL CC / UL CC links are fixed to the system or semi-statically Can be made.
  • M ( ⁇ N) CCs the frequency band that can be monitored / received by a specific terminal.
  • Various parameters for carrier aggregation may be set in a cell-specific, UE group-specific, or UE-specific manner.
  • Cross-carrying waves Scheduling is, for example, of any of to the control area of any one of the DL CC of a plurality of serving cells includes both the downlink scheduling assignment information of another DL (, or a plurality of serving cells one This means that all of uplink scheduling grant information for a plurality of UL CCs linked with the DL CC is included in the control region of the DL CC, Fig. 7 is a diagram illustrating a case where cross-carrier scheduling is applied.
  • the carrier indicator field (CIF) is described first with reference to FIG. 7.
  • the CIF may be included or not included in the DCI format transmitted through the PDCCH, and when included, this indicates that the cross carrier scheduling is applied. If cross carrier scheduling is not applied, downlink scheduling allocation information is valid on a DL CC through which current downlink scheduling allocation information is transmitted. The uplink scheduling grant is also valid for one UL CC linked with the DL CC through which the downlink scheduling assignment information is transmitted.
  • the CIF indicates a CC related to downlink scheduling allocation information transmitted through a PDCCH in one DL CC.
  • downlink allocation information about DL CC B and DL CC C that is, information about PDSCH resources, is transmitted through a PDCCH in a control region on DL CC A.
  • the UE monitors the DL CC A to know the CC corresponding to the resource region of the PDSCH through the CIF.
  • ePDCCH enhanced PDCCH
  • Cellular network-based wireless communication systems have the same kind of homogeneous network or different types of heterogeneous network interference.
  • the influence of such interference may affect not only the data channel but also the control channel.
  • a cell causing interference interferes with a specific subframe (s) of an Almost blank subframe (ABS) (a basic downlink signal (eg, a cell-specific reference signal)).
  • ABS Almost blank subframe
  • the interference to neighboring cells is reduced or allocated to the UE at the cell edge using scheduling information between base stations.
  • the frequency domain of each cell may be set to be orthogonal.
  • the control channel (PDCCH, PCFICH, PHICH) may need to be transmitted in all subframes, the entire downlink bandwidth There is a problem that it is difficult to avoid interference because it is allocated and transmitted.
  • FIG. 8 is a technique that can be used when exchanging scheduling information between base stations, and shows a technique of allocating PDSCH in a frequency region orthogonal to terminals at a cell edge to mitigate interference.
  • the PDCCH has a problem that interference cannot be mitigated due to a reason for transmitting the entire downlink bandwidth. For example, since the time-frequency region in which the PDCCH from eNBl to UE1 is transmitted and the time-frequency region in which the PDCCH from eNB2 to UE2 are transmitted overlap, the PDCCH transmission for each of UE1 and UE2 is mutually different. Interfere with and receive.
  • the PUCCH or the PUSCH transmitted by the UE1 may act as an interference to the PDCCH or the PDSCH that the adjacent UE2 should receive.
  • interference on the PDSCH can be avoided by allocating terminals to the orthogonal frequency domain, but the PDCCH is affected by the interference by the PUCCH or the PUSCH transmitted by the UE1.
  • the introduction of an ePDCCH different from the current PDCCH is discussed.
  • the ePDCCH has not only interference, but also has the purpose of effectively supporting CoMP (Coordinated Multipoint Transmission) and MU-MIMO (Multiuser-Multi Input Multi Output).
  • CoMP Coordinatd Multipoint Transmission
  • MU-MIMO Multiuser-Multi Input Multi Output
  • the time-frequency resource for the ePDCCH is a time-frequency resource region for the PDCCH in the existing LTE / LTE-A system as shown in FIG. 10 (a) (eg, up to 4 at first in the first slot in a subframe).
  • Time division multiplexing (TDM) scheme in a time-frequency resource region excluding 0 FDM symbols).
  • PDCCH and ePDCCH may be distinguished on the time axis.
  • the ePDCCH may be allocated to a predetermined number of OFDM symbols other than the OFDM symbol to which the PDCCH is allocated in the first slot of the subframe.
  • time-frequency resources for the ePDCCH may be allocated by frequency division multiplexing (FDM). That is, different ePDCCHs can be distinguished on the frequency axis.
  • FDM frequency division multiplexing
  • the ePDCCH may be allocated to a predetermined number of subcarriers for the entire OFDM symbol except for the resource region for the PDCCH in the subframe.
  • the ePDCCH region shown in FIG. 10 is exemplary and may be determined in various ways such as allocating by a combination of TDM and FDM.
  • an area to which an ePDCCH is allocated may be set to an area that is divided from one or more time resources or frequency resources with an existing PDCCH and / or another ePDCCH.
  • discussions about the location on the ePDCCH physical resources as described above may include machine type communication (MTC) (D2D (Device to Device) or Machine to Machine (M2M)), MU-MIM0 ( Multi User-Multiple Input Multiple Output), CoMPCCoordinated Multipoint Tx / Rx).
  • MTC machine type communication
  • M2M Machine to Machine
  • MU-MIM0 Multi User-Multiple Input Multiple Output
  • CoMPCCoordinated Multipoint Tx / Rx CoMPCCoordinated Multipoint
  • the uplink scheduling grant information is included in DCI formats 0 and 4 and transmitted along with other control information through the PDCCH.
  • the uplink scheduling grant supports continuous RB allocation on the frequency axis.
  • the allocation information indicates that the starting point and length of the consecutive RBs are in the form of Resource Indication Value (RIV). Is sent.
  • RIV Resource Indication Value
  • Table 3 shows the different steps according to the system bandwidth.
  • the system bandwidth is expressed in units of the total number of RBs included in the uplink bandwidth.
  • Table 3 two types of steps are set. This is exemplary and the number and value of the steps may be variously set. However, if the value of the step increases, The Kessling units will not be compact and need to be selected appropriately.
  • L CRBs It can be expressed as ,,,,,. here
  • RB start indicates a starting point in consecutive RBs for uplink scheduling grant
  • L CRBs indicates a length
  • the RIV is defined as Equation 2 below. .
  • RIV N ⁇ (N ⁇ -z CRBs +1) + ( ⁇ L -1-U
  • Equations 4 and 5 may be expressed.
  • Equation 4 B (KB-L C ' RBS + 1) + (N R ' ⁇ 1 ⁇ RB ')
  • ⁇ ⁇ ⁇ start 1 N TB ⁇ CRBs ⁇ CRBs 1 i RB
  • RIV value can be derived using Equation 4.
  • the derived RIV value is 100111 in bits. That is, it can be seen that the number of bits can be reduced in the case of applying the step-all in comparison with the case in which the step-all is applied.
  • RBG Resource Block Groups
  • RBG means grouping a predetermined number of RBs included in the system bandwidth.
  • RBG according to system bandwidth is shown in Table 4 below.
  • P '2 P RIV may be represented by the following equation (6) or (7).
  • RIV A ( ⁇ V CRBs + 1) + (N R f -1-RB,)
  • RIV is starting point information of consecutive RBs.
  • the scale factor ( LY ⁇ RB P or 1) which is the number of RBs, and the number of RBs in the system bandwidth.
  • Start' T RB ⁇ CRBs ⁇ CRBs' l RB) A may seen that a variable, which are, respectively, the start point information ( ") to the scale factor (W R B or P 1) multiplied by a value, 1 / N 1 I n
  • Equation 4-7 which derives the RIV, is expressed as the starting point information to which the scale factor is applied and the RB number of the length information system bandwidth, the starting point and the length of the continuous RB limited to any one of steps or multiples of the RBG are It can be expressed as an integer multiple of the scale factor inverse.
  • the base station can determine a continuous RB corresponding to the uplink grant for a specific terminal (S1210).
  • the base station In order to inform the UE of this continuous RB, the base station generates an RIV (S1220).
  • the base station applies a scale factor to the starting point information, the length information, and the number of RBs of the system bandwidth.
  • the specific equation is the same as Equation 4-7.
  • the DCI may be generated along with other control information, and the DCI may be transmitted through the PDCCH (S1230).
  • an additional blind decoding attempt may occur on the terminal side.
  • DCI format 0 is defined to have the same payload size as DCI format 1A and does not require separate decoding attempts for the two formats.
  • the number of decoding attempts is increased because decoding must be attempted for each of the two formats. .
  • This acts as an additional burden of processing, and can be solved by applying the step in the first embodiment or the RBG in the second embodiment to the RIV representing downlink scheduling allocation information in DCI format 1A.
  • the stem is applied to DCI format 0
  • the stem is applied to DCI format 1A.
  • RBG is also used to DCI format 1A.
  • step and RBG are applied to RIV indicating downlink scheduling grant information in DCI format 1A.
  • the method and description are duplicated, so they will be briefly described. If you apply the step first, If
  • RIV N V F R D B L (N : VRB Lc'RBs +1) + (KRB ⁇ 1 - RB rt).
  • ⁇ is the total number of RBs (which may be logical resource blocks (VRBs), which are logical units) included in the downlink bandwidth,
  • VRBs logical resource blocks
  • IV RB should be used in the same manner as used in the first embodiment, as shown in Table 5 below.
  • RIV is as follows.
  • RIV N v f B (NZ-L C ( RBS + 1) + ( B -1-RB S F TART )
  • ⁇ is the total RB (virtual resource block that is a logical unit) included in the downlink bandwidth
  • IP ... ( D RB ⁇ J-1) ⁇ , L CRBs __p 2P Limited to And RBG according to the system bandwidth is preferably used in the same manner as used in the second embodiment.
  • FIG. 13 is a diagram showing the configuration of a base station apparatus and a terminal apparatus according to the present invention.
  • the base station apparatus 1310 may include reception modules 1311, transmission modules 1312, a processor 1313, a memory 1314, and a plurality of antennas 1315.
  • the plurality of antennas 1315 means a base station apparatus supporting MIM0 transmission and reception.
  • the reception modules 1311 may receive various signals, data, and information on uplink from the terminal.
  • the transmission modules 1312 may transmit various signals, data, and information on downlink to the terminal.
  • the processor 1313 may control the overall operation of the base station apparatus 1310.
  • the base station apparatus 1310 may be configured to transmit control information for uplink multi-antenna transmission.
  • the processor 1313 of the base station apparatus may be configured to transmit, via the transmission modules 1312, a DCI format related to uplink grant or downlink scheduling assignment on the PDCCH.
  • the processor 1313 generates a resource indication value by using the continuous first information and the second information of the RB, wherein the first information and the second information are scaled with the third information determined according to the system bandwidth. Applied as a factor, it may be configured to generate a DCI including the resource indication value and used for uplink grant.
  • the processor 1313 of the base station apparatus 1310 performs a function of calculating and processing information received by the base station apparatus 1310, information to be transmitted to the outside, and the like.
  • 1314 may store the processed information and the like for a predetermined time and may be replaced with a component such as a buffer (not shown).
  • a terminal device 1320 may include reception modules 1321, transmission modules 1322, a processor 1323, a memory 1324, and a plurality of antennas 1325. have.
  • the plurality of antennas 1325 means a terminal device that supports MIM0 transmission and reception.
  • Receiving modules 1321 may receive various signals, data, and information on downlink from the base station.
  • the transmission modules 1322 may transmit various signals, data, and information on the uplink to the base station.
  • the processor 1323 may control operations of the entire terminal device 1320.
  • the terminal device 1320 may be configured to perform uplink multiple antenna transmission.
  • the processor 1323 of the terminal device attempts to decode according to a DCI format used for uplink authorization for a search space consisting of a set of PDCCH candidates for the control information, and obtains a resource indication obtained when the decoding attempt is successful. From the value, the third information determined according to the system bandwidth can be configured to determine the continuous resource block to use for the Physical Uplink Public Channel (PUSCH) by deriving the first information and the second information applied as the scale factor. If the terminal device 1320 decodes the DCI format 1A related to the downlink scheduling assignment, the processor 1323 may acquire information necessary for the PDSCH indicated by the first information and the second information derived from the RIV. May be configured.
  • PUSCH Physical Uplink Public Channel
  • the processor 1323 of the terminal device 1320 performs a function of processing the information received by the terminal device 1320, information to be transmitted to the outside, and the memory 1324 stores the processed information and the like for a predetermined time. Can be stored while, such as a buffer (not shown) Can be replaced by a component.
  • the description of the base station apparatus 1310 may be equally applicable to a relay apparatus as a downlink transmission entity or an uplink reception entity, and the description of the terminal device 1320 is a downlink. The same may be applied to a relay apparatus as a receiving subject or an uplink transmitting subject.
  • Embodiments of the present invention described above may be implemented through various means. For example, embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
  • the method according to embodiments of the present invention may include one or more Application Specific Integrated Circuits (ASICs), DSPs CDigital Signal Processors (DSPs), DSPDs CDigital Signal Processing Devices (DSPs), programmable logic devices (PLDs), FPGAs (Field Programmable Gate Arrays), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs Application Specific Integrated Circuits
  • DSPs CDigital Signal Processors
  • DSPs 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 modules, procedures, or functions for performing the functions or operations described above.
  • the software code may be stored in a memory unit and driven by a processor.
  • the memory unit is located inside or outside the processor Thus, data may be exchanged with the processor by various known means.
  • Embodiments of the present invention as described above may be applied to various mobile communication systems.

Landscapes

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

Abstract

L'invention concerne un système de télécommunication sans fil, et plus particulièrement un procédé permettant à une station de base de transmettre des données de commande par l'intermédiaire d'un canal de commande de liaison descendante physique (PDCCH) dans un système de télécommunication sans fil. Le procédé comprend les étapes consistant à: produire une valeur d'indication de ressources au moyen de données de point de départ et de données de longueur sur un bloc de ressources continu (RB), et appliquer un facteur d'échelle, déterminé sur la base d'une bande passante de système, aux données de point de départ et aux données de longueur; produire des données de commande de liaison descendante (DCI) incluant la valeur d'indication de ressources et qui sont utilisées pour une approbation de liaison montante; et transmettre les DCI par l'intermédiaire du PDCCH.
PCT/KR2012/001254 2011-07-13 2012-02-20 Procédé et dispositif de transmission de données de commande par l'intermédiaire d'un canal de commande de liaison descendante physique dans un système de télécommunication sans fil WO2013008987A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161507571P 2011-07-13 2011-07-13
US61/507,571 2011-07-13

Publications (1)

Publication Number Publication Date
WO2013008987A1 true WO2013008987A1 (fr) 2013-01-17

Family

ID=47506250

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2012/001254 WO2013008987A1 (fr) 2011-07-13 2012-02-20 Procédé et dispositif de transmission de données de commande par l'intermédiaire d'un canal de commande de liaison descendante physique dans un système de télécommunication sans fil

Country Status (1)

Country Link
WO (1) WO2013008987A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107210872A (zh) * 2014-11-19 2017-09-26 英特尔Ip公司 增加载波监测无线通信环境中进行信令传输的系统和方法
CN110519028A (zh) * 2018-05-21 2019-11-29 维沃移动通信有限公司 处理方法和设备
CN110740028A (zh) * 2014-08-07 2020-01-31 Lg电子株式会社 用于在d2d通信中确定终端的发送资源块池的方法及其设备
CN110945940A (zh) * 2018-05-16 2020-03-31 Lg电子株式会社 用于发送和接收数据信道的方法和设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009154341A1 (fr) * 2008-06-19 2009-12-23 Lg Electronics Inc. Procédé de signalisation d'attribution de ressources destiné à ajuster la granularité d'un système cellulaire multiporteuse
US20100142461A1 (en) * 2007-03-20 2010-06-10 Ntt Docomo, Inc. Base station, communication terminal, transmission method, and reception method
WO2011032342A1 (fr) * 2009-09-21 2011-03-24 中兴通讯股份有限公司 Procédé et système de transmission pour information de commande en liaison descendante
WO2011053009A2 (fr) * 2009-10-28 2011-05-05 엘지전자 주식회사 Dispositif de noeud de relais pour recevoir des informations de commande depuis une station de base et procédé s'y rapportant

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100142461A1 (en) * 2007-03-20 2010-06-10 Ntt Docomo, Inc. Base station, communication terminal, transmission method, and reception method
WO2009154341A1 (fr) * 2008-06-19 2009-12-23 Lg Electronics Inc. Procédé de signalisation d'attribution de ressources destiné à ajuster la granularité d'un système cellulaire multiporteuse
WO2011032342A1 (fr) * 2009-09-21 2011-03-24 中兴通讯股份有限公司 Procédé et système de transmission pour information de commande en liaison descendante
WO2011053009A2 (fr) * 2009-10-28 2011-05-05 엘지전자 주식회사 Dispositif de noeud de relais pour recevoir des informations de commande depuis une station de base et procédé s'y rapportant

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110740028A (zh) * 2014-08-07 2020-01-31 Lg电子株式会社 用于在d2d通信中确定终端的发送资源块池的方法及其设备
CN110740028B (zh) * 2014-08-07 2021-12-28 Lg电子株式会社 用于在d2d通信中确定终端的发送资源块池的方法及其设备
CN107210872A (zh) * 2014-11-19 2017-09-26 英特尔Ip公司 增加载波监测无线通信环境中进行信令传输的系统和方法
CN107592192A (zh) * 2014-11-19 2018-01-16 英特尔Ip公司 增加载波监测无线通信环境中进行信令传输的系统和方法
CN107592192B (zh) * 2014-11-19 2021-10-08 苹果公司 增加载波监测无线通信环境中进行信令传输的系统和方法
CN110945940A (zh) * 2018-05-16 2020-03-31 Lg电子株式会社 用于发送和接收数据信道的方法和设备
CN110519028A (zh) * 2018-05-21 2019-11-29 维沃移动通信有限公司 处理方法和设备

Similar Documents

Publication Publication Date Title
JP6456471B2 (ja) 非兔許帯域を支援する無線接続システムにおいて伝送機会区間を設定する方法及び装置
EP2884678B1 (fr) Procédé de réception de canal de commande de liaison descendante dans un système de communication sans fil
KR102127535B1 (ko) 무선통신시스템에서 제어정보 전송/획득 방법 및 장치
KR102131832B1 (ko) 무선 통신 시스템에서 제어정보 전송 방법 및 장치
US9648632B2 (en) Communication method considering carrier type and apparatus for same
KR102078366B1 (ko) 무선 통신 시스템에서 제어정보 수신 방법 및 장치
KR101995430B1 (ko) 제어 정보 송수신 방법 및 이를 위한 장치
US9544887B2 (en) Method for receiving downlink signal, and user device, and method for transmitting downlink signal, and base station
EP3518444A1 (fr) Procédé de réception d'informations de commande de liaison descendante par ue dans un système de communication sans fil et appareil associé
US9473965B2 (en) Method for monitoring downlink control channel in wireless communication system, and apparatus therefor
JP6321851B2 (ja) 無線通信システムにおいて制御情報受信方法及び装置
WO2012124981A2 (fr) Procédé et dispositif destinés à l'émission d'informations de commande dans un système de communication sans fil
WO2013055094A2 (fr) Procédé et appareil pour émettre/recevoir des informations de commande dans un système de communication sans fil
WO2013002573A2 (fr) Procédé et appareil de transmission d'informations de commande dans un système de communication sans fil
WO2012150775A9 (fr) Procédé de transmission/réception par un terminal d'un signal à destination/en provenance d'une station de base dans un système de communication sans fil et dispositif à cet effet
WO2015005743A1 (fr) Procédé et appareil d'émission-réception d'un signal dans un système de communication sans fil
WO2014073776A1 (fr) Procédé et dispositif de réception ou de transmission de données de liaison descendante dans un système de communication sans fil
KR20150046029A (ko) 무선 통신 시스템에서 하향링크 신호 수신 방법 및 장치
WO2013100645A1 (fr) Procédé et dispositif de réception de données dans un système de communication sans fil
EP2897435A1 (fr) Procédé et appareil de réception de signal de liaison descendante dans un système de communication sans fil
KR20150058191A (ko) 무선 통신 시스템에서 제어정보 수신 방법 및 장치
WO2013055092A2 (fr) Procédé et appareil pour émettre/recevoir des informations de commande dans un système de communication sans fil
WO2013069955A1 (fr) Procédé et appareil d'acquisition d'informations de commande dans système de communication sans fil
WO2013048108A2 (fr) Procédé et dispositif d'acquisition d'informations de contrôle dans un système de communication sans fil
KR20160085752A (ko) 무선 통신 시스템에서 하향링크 신호 송수신 방법 및 이를 위한 장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12811227

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12811227

Country of ref document: EP

Kind code of ref document: A1