WO2012093912A2 - Procédé pour transmettre des informations de commande dans un système de communication et station de base associée, et procédé pour traiter des informations de commande et terminal associé - Google Patents

Procédé pour transmettre des informations de commande dans un système de communication et station de base associée, et procédé pour traiter des informations de commande et terminal associé Download PDF

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WO2012093912A2
WO2012093912A2 PCT/KR2012/000186 KR2012000186W WO2012093912A2 WO 2012093912 A2 WO2012093912 A2 WO 2012093912A2 KR 2012000186 W KR2012000186 W KR 2012000186W WO 2012093912 A2 WO2012093912 A2 WO 2012093912A2
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resource allocation
dci format
control information
bit
resource
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PCT/KR2012/000186
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English (en)
Korean (ko)
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WO2012093912A3 (fr
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홍성권
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(주)팬택
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Publication of WO2012093912A3 publication Critical patent/WO2012093912A3/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure

Definitions

  • the present disclosure relates to a communication system, and relates to a method for transmitting and processing control information and a base station and a terminal therefor.
  • LTE Long Term Evolution
  • LTE-A LTE Advanced
  • the base station in the communication system for generating a control information including a bit indicating one of the continuous resource allocation or discontinuous resource allocation, and the bit further configuring the resource allocation field in a DCI format; And transmitting control information of the DCI format to a terminal through a physical downlink control channel.
  • Another embodiment of the present invention provides a method comprising: receiving control information from a base station in a physical downlink control channel in a DCI format by a terminal in a communication system; It provides a control information processing method comprising the step of interpreting the control information of the DCI format.
  • Another embodiment is a base station for transmitting control information to a user equipment in a communication system, wherein aperiodic CSI triggering bit and aperiodic SRS triggering bit are added, and have the same size as that of DCI format 0 including continuous resource allocation or discontinuous resource allocation.
  • a base station including a signal encoding unit for generating control information including a bit indicating one and a bit additionally configuring a resource allocation field in a DCI format and transmitting the control information of the DCI format to a terminal through a physical downlink control channel.
  • Another embodiment is a terminal for receiving and processing control information from a base station in a communication system, wherein a continuous resource allocation or discontinuous resource having the same size as DCI format 0 including aperiodic CSI triggering bit and aperiodic SRS triggering bit added.
  • a terminal including a signal decoding unit for receiving control information including a bit indicating one of the allocations and a bit additionally configuring a resource allocation field from a base station in a physical downlink control channel in a DCI format and interpreting the control information in the DCI format; to provide.
  • Yet another embodiment includes a bit in which a base station indicates one of continuous resource allocation or discontinuous resource allocation, a local / distribution allocation flag indicating a type of virtual resource block, and a resource allocation field indicating resource allocation. / Combining the allocation allocation flag and the resource allocation field to receive control information indicating discontinuous resource allocation from the base station in the physical downlink control channel in DCI format; It provides a control information processing method comprising the step of interpreting the control information of the DCI format.
  • Another embodiment is a base station for transmitting control information to a terminal in a communication system, wherein the base station has a bit indicating one of continuous resource allocation or discontinuous resource allocation, a local / distribution allocation flag indicating a type of a virtual resource block, and resource allocation. And a resource allocation field indicating a resource allocation field and generating the control information indicative of discontinuous resource allocation in a DCI format by combining the local / distribution allocation flag and the resource allocation field, and transmitting the control information of the DCI format to a terminal through a physical downlink control channel.
  • a base station including a signal coding unit to transmit.
  • Another embodiment is a terminal for receiving and processing control information from a base station in a communication system, comprising: a bit indicating either a continuous resource allocation or a discontinuous resource allocation, a local / distribution allocation flag indicating a type of a virtual resource block, or a resource allocation And a resource allocation field indicating a resource allocation field and receiving control information indicating discontinuous resource allocation from a base station in a physical downlink control channel in a DCI format by combining the local / distribution allocation flag and the resource allocation field.
  • a terminal including a signal decoding unit to analyze.
  • FIG. 1 is a diagram schematically illustrating a wireless communication system to which an embodiment of the present invention is applied.
  • FIG. 2 is a flowchart illustrating a configuration of a PDCCH according to another embodiment.
  • FIG. 4 illustrates an example of a format of DCI format 0 and DCI format 1A among information payload formats of the PDCCH of FIG. 2.
  • FIG. 5 illustrates another example of formats of DCI format 0 and DCI format 1A among the information payload formats of the PDCCH of FIG. 2.
  • FIG. 6 illustrates a signal flow for transmitting an aperiodic SRS through an uplink component carrier additionally configured using the aperiodic SRS triggering message of FIG. 5 according to another embodiment.
  • FIG. 8 illustrates a signal flow for transmitting resource allocation information of additional bits of DCI format 1A of FIG. 5.
  • FIG. 9 is a flowchart of transmitting a PDCCH in the determined DCI formats after determining the DCI formats of FIG. 4 and the DCI formats of FIG. 5.
  • FIG. 10 is a flowchart of processing the PDCCHs of the DCI formats of FIG. 4 and the DCI formats of FIG. 5.
  • 11 is a block diagram of a base station according to another embodiment for generating downlink control information.
  • FIG. 12 is a block diagram of a terminal according to another embodiment.
  • FIG. 13 is a block diagram schematically illustrating a wireless communication system in which an embodiment of the present invention is implemented.
  • FIG. 14 is a flowchart for transmitting a PDCCH in the determined DCI formats after determining the DCI formats of FIGS. 5D and 5E.
  • FIG. 1 illustrates a wireless communication system to which embodiments of the present invention are applied.
  • Wireless communication systems are widely deployed to provide various communication services such as voice and packet data.
  • a wireless communication system includes a user equipment (UE) 10 and a base station 20 (BS).
  • the terminal 10 and the base station 20 use the MU-MIMO channel information feedback method considering the interference according to the additional UE connection described below, and the switching switching method between the SU-MIMO and the MU-MIMO using the same.
  • the MU-MIMO channel information feedback method and a method of switching between SU-MIMO and MU-MIMO using the same will be described in detail below with reference to FIG.
  • Terminal 10 in the present specification is a generic concept that means a user terminal in wireless communication, WCDMA, UE (User Equipment) in LTE, HSPA, etc., as well as MS (Mobile Station), UT (User Terminal) in GSM ), SS (Subscriber Station), wireless device (wireless device), etc. should be interpreted as including the concept.
  • WCDMA Wideband Code Division Multiple Access
  • UE User Equipment
  • HSPA High Speed Packet Access
  • MS Mobile Station
  • UT User Terminal
  • SS Subscriber Station
  • wireless device wireless device
  • a base station 20 or a cell generally refers to a fixed station communicating with the terminal 10 and includes a Node-B, an evolved Node-B, and a Base Transceiver. May be called other terms such as System, Access Point, Relay Node
  • the terminal 10 and the base station 20 are two transmitting and receiving entities used to implement the technology or the technical idea described in the present specification and are used in a comprehensive sense and are not limited by the terms or words specifically referred to.
  • One embodiment of the present invention is applied to asynchronous wireless communication evolving into Long Term Evolution (LTE) and LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving into CDMA, CDMA-2000 and UMB) Can be.
  • LTE Long Term Evolution
  • CDMA Code Division Multiple Access
  • CDMA-2000 and UMB Universal Mobile Broadband
  • one radio frame or radio frame includes 10 subframes, and one subframe includes two slots ( slot).
  • the basic unit of data transmission is a subframe unit, and downlink or uplink scheduling is performed on a subframe basis.
  • One slot may include a plurality of OFDM symbols in the time domain and at least one subcarrier in the frequency domain, and one slot may include 7 or 6 OFDM symbols.
  • each time slot may include seven symbols in the time domain and twelve subcarriers or subcarriers in the frequency domain, such that time is defined as one slot.
  • the frequency domain may be referred to as a resource block or a resource block (RB), but is not limited thereto.
  • the physical downlink control channel which is one of control channels for transmitting control information, is divided into various DCI formats (Downlink Control Indication format, DCI format) and provides UE specific control information (UE specific). do.
  • DCI format Downlink Control Indication format
  • UE specific UE specific control information
  • the UE provides information for decoding a Physical Downlink Shared Channel (PDSCH) or a Physical Uplink Shared Channel (PUSCH) from the terminal's point of view and communicates with the UE at the same time. It also provides the necessary control information.
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • FIG. 2 is a flowchart illustrating a configuration of a PDCCH according to another embodiment.
  • step S210 a cyclic redundancy check (CRC) for error detection is added to each PDCCH payload.
  • the CRC is masked with an identifier (referred to as RNTI (Radio Network Temporary Identifier)) according to the owner or purpose of the PDCCH.
  • RNTI Radio Network Temporary Identifier
  • channel coding is performed on the control information added with the CRC to generate coded data.
  • rate matching is performed according to the CCE aggregation level allocated to the PDCCH format.
  • the coded data is modulated to generate modulation symbols.
  • modulation symbols are mapped to physical resource elements (CCE to RE mapping).
  • the base station adds a cyclic redundancy check (CRC) for error detection to the control information including the resource allocation information and performs channel coding on the control information to which the CRC is added, thereby encoding coded data.
  • CRC cyclic redundancy check
  • Generating modulation symbols, generating modulation symbols by mapping encoded data, and mapping modulation symbols to physical resource elements may be transmitted to the terminal.
  • 3 is a flowchart illustrating PDCCH processing.
  • step S320 since the UE 10 does not know at which CCE aggregation level it should receive the PDCCH, demodulation of the CCE aggregation level that the payload corresponding to the reference DCI format according to its transmission mode may have. do.
  • step S340 channel decoding is performed on the coded data according to the code rate, and the CRC is checked to detect whether an error occurs. If no error occurs, the terminal 10 detects its own PDCCH. If an error occurs, the terminal 10 continuously performs blind decoding on another CCE aggregation level or another DCI format.
  • the terminal 10 having detected its own PDCCH removes the CRC from the decoded data to obtain control information necessary for the terminal 10.
  • DCI format 0 is detected and an uplink grant included in DCI format 0 is analyzed.
  • DCI format 1A is detected and the downlink grant included in DCI format 1A calculates the RIV through decoding when expressing the resource indicator of the resource allocation field described later, and then calculates coefficients of the corresponding resource indicator. Can be interpreted.
  • DCI formats are detected and the downlink scheduling assignments included in this control information, uplink scheduling grant, and power control commands are used to identify the corresponding CCs identified by the CC. It performs downlink scheduling assignment, uplink scheduling grant, and power control.
  • the terminal demaps the physical resource element receiving the control information from the base station to the symbols (CCE to RE demapping), generating data by demodulating the demapped symbols, and performing channel decoding on the demodulated data. Checking the CRC to detect whether an error has occurred, removing the CRC from the decoded data, obtaining necessary control information, and interpreting resource allocation information from the obtained control information. have.
  • a DCI format 0 (410) or a DCI format 1A (420) is distinguished through a division bit inside the PDCCH (a division bit for distinguishing DCI format 1A from DCI format 1A).
  • DCI format 0 410 and DCI format 1A 420 are designed to have the same size, and considering the use of the internal fields of DCI format 0 410 and DCI format 1A 420, DCI format 1A ( Since 420 requires more than one bit more than DCI format 0 (410), in DCI format 0 (410), as shown in FIG.
  • FIG. 5 illustrates another example of formats of DCI format 0 and DCI format 1A among the information payload formats of the PDCCH of FIG. 2.
  • the formats of DCI format 0 and DCI format 1A are described as an example, but may be applied to the formats of any current or future DCI formats in the same manner.
  • bits may be added as compared with the existing ones in DCI format 0.
  • This bit addition of DCI format 0 means bit addition of DCI format 1A.
  • Bits added to DCI format 1A only have a surplus bit as an overhead for DCI format 1A and deteriorate PDCCH reception performance.
  • DCI format 1A is a channel for transmitting downlink control information.
  • the resource allocation scheme is based on continuous resource allocation as in DCI format 0.
  • DCI format 1 is a typical format for transmitting multiple clusters in downlink.
  • DCI format 1 has a poor reception performance with respect to DCI format 1A and needs to relatively increase the aggregation level. As the aggregation level increases, the number of PDCCHs that can be transmitted in one subframe decreases as the PDCCH allocation region increases in the required control region. If the PDCCH is smaller, this means that the number of UEs that can be scheduled in the unit subframe is small.
  • the ratio of the total number of clusters to the terminal of the large number of allocated resources becomes smaller as the number of clusters required increases. That is, the number of terminals allocated to only one continuous cluster is the largest, followed by the number of terminals allocated to two discontinuous clusters, and there are almost no terminals allocated to a certain number, for example, four or more clusters.
  • two bits may be added to the DCI format 0 510 for the aperiodic SRS triggering field 512 and the aperiodic CSI triggering field 514 together with the uplink grant 511.
  • the uplink resource allocation information 511 includes resource allocation information used for transmission of uplink data.
  • the aperiodic SRS triggering field 512 may include flag information or field information indicating aperiodic SRS triggering.
  • the aperiodic CSI triggering field 514 may include flag information or field information indicating aperiodic CSI triggering.
  • the division bit 516 for distinguishing the continuous / discontinuous allocation may be a surplus bit basically present as shown in FIG.
  • CC component carrier
  • RRC connection connection among various component carriers
  • secondary CCs in addition to the PCC, which is initially connected to the UE (Connection or RRC Connection) among various CCs.
  • the base station transmits a message whether the application to the terminal (S600).
  • the applicability message may include only information indicating to the UE whether to use the aperiodic SRS scheme, and the resource allocation of any one of the aforementioned aperiodic CSI application and / or continuous resource allocation or discontinuous resource allocation scheme. It may also include information indicating whether the method is used.
  • This applicability message may be a higher layer message, for example, but not limited to, an RRC signal or signaling.
  • the base station After step S600, the base station generates and transmits an aperiodic SRS triggering message to the terminal (S620).
  • the aperiodic SRS triggering message may be transmitted through a downlink (DL) component carrier having a linkage configuration (linkage) with the corresponding uplink component carrier, and may be cross CC scheduling or cross carrier.
  • DL downlink
  • linkage linkage configuration
  • cross carrier a carrier index field (CIF) may be inserted and transmitted as one of downlink component carriers regardless of connection establishment.
  • CIF carrier index field
  • DCI format 0 and DCI format 4 may be used as a transmission format of the PDCCH (downlink physical control channel).
  • DCI format 0 is used as the aperiodic SRS triggering message
  • the aperiodic SRS triggering field 512 of DCI format 0 510 of FIG. 5A may be used. That is, the base station generates and transmits the aperiodic SRS triggering field 512 of the DCI format 0 510 of FIG. 5A as an aperiodic SRS triggering message.
  • configuration parameters for aperiodic SRS transmission may be transmitted to the terminal as an RRC signal.
  • the terminal transmits the aperiodic SRS (S630).
  • the base station acquires uplink channel information based on the received aperiodic SRS.
  • the base station generates scheduling information for the additionally configured uplink SCC based on the obtained channel information.
  • the base station transmits the generated scheduling information to the terminal using an uplink grant.
  • the terminal may transmit data through the uplink component carrier further configured based on the received uplink.
  • FIG. 7 illustrates a signal flow for transmitting an aperiodic CSI using the aperiodic CSI triggering message of FIG. 5 according to another embodiment.
  • the base station transmits an application availability message to the terminal (S700).
  • the applicability message may include only information indicating to the UE whether to use the aperiodic CSI scheme, and the resource allocation of any of the aperiodic CSI application and / or continuous resource allocation or discontinuous resource allocation scheme described above or below. It may also include information indicating whether the method is used.
  • This applicability message may be a higher layer message, for example, but not limited to, an RRC signal or signaling.
  • step S700 the base station generates and transmits an aperiodic CSI triggering message to the terminal (S710).
  • the aperiodic CSI triggering message may be transmitted through a downlink (DL) component carrier connected to a corresponding uplink component carrier, and the terminal having cross CC scheduling or cross carrier scheduling enabled.
  • a carrier index field may be inserted and transmitted as one of downlink (DL) component carriers regardless of connection establishment.
  • DCI format 0 When the aperiodic CSI triggering message is transmitted through the PDCCH of the L1 layer, DCI format 0 may be used as a transmission format of a PDCCH (downlink physical control channel).
  • the aperiodic CSI triggering field 514 of DCI format 0 510 of FIG. 5 may be used. That is, the base station generates and transmits the aperiodic CSI triggering field 514 of DCI format 0 510 of FIG. 5A to the UE as an aperiodic CSI triggering message.
  • an aperiodic CSI triggering field 514 may be configured by combining two bits with one additional bit and an existing bit, but the present invention is not limited thereto.
  • SIB-2 linkage refers to a pair relationship or linkage relationship between a downlink component carrier and an uplink component carrier known to the UE by SIB-2 information in system information.
  • &Quot; 10 " and “ 11 " indicate that the downlink component carrier, which is received by the terminal with the aperiodic CSI request and whose CSI information is to be measured, is already determined (by previous transmission) by the RRC.
  • the CQI triggering or CQI request means a message for which the base station requests a type of CSI to the terminal.
  • Table 4 Aperiodic CSI Triggering Bit Information 11 Determination of Downlink Component Carrier for which CSI Information is Obtained by RRC 10 Determination of Downlink Component Carrier for which CSI Information is Obtained by RRC 01 Determination of Downlink Component Carrier for Which CSI Information is Obtained by SIB-2 Linkage 00 Not aperiodic CSI request
  • the various Channel Status Indications (CSIs) transmitted in the uplink are channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), signal to noise ratio (SNR) and frame error rate (FER), delta channel quality. It may include one or more of the indicator (delta CQI).
  • the terminal When the terminal receives the aperiodic CSI triggering message of the base station, the terminal performs the aperiodic CSI reporting (S720).
  • the aperiodic CSI reporting may be scheduled on the PUSCH configured only with the UL-SCH or the CSI, but is not limited thereto.
  • the aperiodic CSI reporting is triggered by an uplink grant, e.g., the aperiodic CSI triggering field 514 of DCI format 0 510 of FIG. 5A, to which the PUSCH phase is mapped Uplink Control Indication) may be carried on one uplink component carrier indicated by an uplink grant including aperiodic CSI triggering.
  • the base station transmits data to the terminal using periodic CSI reporting with aperiodic CSI reporting.
  • the downlink resource allocation information 521 includes resource allocation information used for transmission of downlink data.
  • the continuous / discontinuous division field 522 includes whether downlink resource allocation is continuous or discontinuous. Part 424 of the resource allocation field 521 may be used as part of the resource allocation field in the case of discontinuous resource allocation in combination with the existing resource allocation field.
  • a resource region for resource allocation may be configured in units of time frequency of a resource block (RB).
  • RB resource block
  • the resource block has a large number of resource blocks, and thus a bit requirement for indicating resource allocation information.
  • RBG resource block group
  • Resource allocation information represented by such a resource block or resource block group may be transmitted in the form of Resource Indication Value (RIV) in a Resource Allocation Field in the PDCCH.
  • RIV Resource Indication Value
  • the bandwidth considered in LTE is 1.4 / 3/5/10/15/20 MHz, which is 6/15/25/50/75/100 when expressed as the number of resource blocks.
  • the size of the resource block group represented by the resource block corresponding to each band is 1/2/2/3/4/4. Therefore, the number of resource block groups corresponding to each band is 6/8/13/17/19/25.
  • resource allocation methods There may be various types of resource allocation methods (type 0, type 1 and type 2) according to a method of expressing how resources are allocated to the resource allocation field mentioned above.
  • type 0 represents a resource allocation area in the form of a bitmap. That is, resource allocation for all resource blocks or each resource block group may be represented by 1 and non-resource allocation by 0.
  • Another resource allocation method, type 1 is a method of representing a resource allocation area in a periodic form. That is, it shows resource allocation in the form of having a period of constant value P and distributed at regular intervals in the entire allocation area.
  • a division bit for distinguishing type 0 and type 1 may be added.
  • Another resource allocation method, type 2 is used to allocate resource regions having a constant length in succession using offsets and lengths.
  • the resource allocation field of consecutive resource allocation is defined by the starting resource block (RB start ) of the resource block group and the length of terms of virtually contiguously allocated resource blocks.
  • RIV LTE (L CRBs , RB start , )
  • DL means downlink, but is not limited to downlink.
  • Encoding / decoding of RIV for discontinuous resource allocation using such a limited number of clusters uses enumerative source coding or CQI based algorithm.
  • Enumeration source coding is already included as a way to represent the Channel Quality Indicator (CQI), which has the advantages of complexity reduction and implementation stability in terms of ease of standardization and expansion of the already implemented system.
  • CQI Channel Quality Indicator
  • the enumeration source encoding is performed in a frequency unit called a subband, and means a method of expressing selecting a certain number M of subbands in a given subband region (1 to N).
  • Enumerated source coding can be represented as:
  • N subband indexes sorted in ascending size The following values can be calculated for, 1 ⁇ s ⁇ N and s ⁇ s.
  • resource allocation information for uplink resource allocation type 2 is in the uplink system band. Indicate two sets of resource blocks, each containing one or more contiguous resource block groups of size P, to the terminal scheduled for.
  • the resource allocation field in the scheduled uplink grant is a combination index corresponding to the start RBG index s and end RGB index s-1 of resource block set 1 and the start RBG index s and end RGB index s-1 of resource block set 2, respectively.
  • a resource block set or cluster is represented using enumerative source coding in the same way as a standardized method, a resource block set or cluster May not represent RB or RBG equal to 1; This is because the s k of the CQI basic algorithm indicating the channel quality indicator (CQI) cannot be the same value. Therefore, to solve this problem, s 2k + 1 corresponding to the end point in s k is +1.
  • the enumerated source decoding process for the above can be expressed as follows.
  • 14 bits may represent two clusters having full degrees of freedom.
  • the resource allocation field 523 may represent a discontinuous resource allocation having two clusters with a total of 14 bits by adding 1 bit 524 newly added to a resource allocation field (13 bits in total) used for continuous resource allocation.
  • discontinuous resource allocation can be expressed up to 2 clusters, so that the number of UEs having a aggregation level of 1 required by the PDCCH DCI format 1A for transmitting downlink control information occupies more than the total number of UEs.
  • the number of UEs that can be scheduled during the period may increase.
  • the base station determines whether to continuously allocate downlink resources to specific terminals, whether to allocate resources discontinuously, and to which resource block groups.
  • the process of receiving and decoding the PDCCH by the UE is performed through the processes described with reference to FIG. 3.
  • the UE checks the continuous / discontinuous division field 522 of DCI format 1A of the PDCCH to determine whether the resource is allocated continuously or discontinuously, and decodes the RIV value of the continuous / discontinuous allocation allocation field 523 according to a decoding algorithm. You can check the resource block groups assigned to you.
  • FIG. 9 is a flowchart of transmitting a PDCCH in the determined DCI formats after determining the DCI formats of FIG. 4 and the DCI formats of FIG. 5.
  • step S910 If it is determined in step S910 to trigger the non-periodic SRS and the non-periodic CSI, and decide to allocate the non-contiguous resource allocation in addition to the continuous resource allocation as shown in Figure 5 (A) uplink resource allocation information
  • the uplink grant is transmitted to the DCI format 0 510 including the aperiodic SRS triggering field 512 and the aperiodic CSI triggering field 514.
  • one bit is added to DCI format 0 to perform aperiodic SRS triggering depending on whether the bit value is 0/1.
  • one bit is added to DCI format 0, and aperiodic CSI triggering occurs according to whether the bit value is 0/1.
  • one bit is added to DCI format 1A to indicate whether resource allocation is continuous or discontinuous according to 0/1 of this bit value, and one more bit is added to DCI format 1A so that two clusters are allocated for discontinuous resource allocation.
  • step S910 if it is determined in step S910 not to trigger the aperiodic SRS and the aperiodic CSI, as shown in (A) of FIG. 4, the uplink grant is assigned to DCI format 0 410 including only uplink resource allocation information 511. send.
  • the base station when transmitting the resource allocation information to the terminal, the base station configures DCI format 1A 420 including only downlink resource allocation information as shown in FIG. 4B (S930).
  • steps S920 to S940 may be the same as the method of transmitting the PDCCH described with reference to FIGS. 2 and 8.
  • FIG. 10 is a flowchart of processing the PDCCHs of the DCI formats of FIG. 4 and the DCI formats of FIG. 5.
  • the UE decodes the downlink grant through blind decoding after receiving the downlink grant through the PDCCH (S1010).
  • step S1020 If it is determined in step S1020 to trigger the aperiodic SRS and the aperiodic CSI (may be added whether to add the non-contiguous resource allocation to the continuous resource allocation) is shown in Figure 5 (A) according to the new control information interpretation
  • the uplink grant is interpreted as a DCI format 0 (510) including an aperiodic SRS triggering field 512 and an aperiodic CSI triggering field 514 together with the uplink resource allocation information 511.
  • the UE determines the continuous / discontinuous division field 522 and the downlink resource allocation together with the downlink resource allocation information 521.
  • the downlink grant is interpreted as DCI format 1A 520 including a part 524 of the field 521 (S1030).
  • step S1020 if it is determined in step S1020 not to trigger the non-periodic SRS and the non-periodic CSI (addition of non-contiguous resource allocation to the continuous resource allocation) may be determined according to the conventional method of FIG. As shown in B), the downlink grant is interpreted as DCI format 1A 420 including only downlink resource allocation information 521 (S1040).
  • steps S1010, S1030, and S1040 may be the same as the processing method of the PDCCH described with reference to FIGS. 3 and 8.
  • the DCI format 1A 530 of FIG. 5 includes downlink resource allocation information 531 as a continuous / discontinuous division field 532 and a downlink resource allocation field 533. It may be the same as DCI format 1A 520 of (B). Meanwhile, the DCI format 1A 530 may include localized / distributed VRB assignment flags 524 and 535.
  • Local / distribution allocation flags 524 and 535 may indicate or represent certain types of virtual resource blocks, eg, two types. Local / distribution allocation flags 524 and 535 may use a particular number of bits, for example one bit.
  • two types of virtual resource blocks are the local type of virtual resource blocks of localized type (hereinafter referred to as 'local type') and the distributed type of virtual resource blocks. of distributed type, hereinafter referred to as 'distributed type'.
  • Resource blocks may include physical resource blocks and virtual resource blocks.
  • Physical resource blocks may be defined by a certain number of consecutive symbols in the time domain and a certain number of consecutive subcarriers in the frequency domain.
  • the virtual resource blocks of the local type correspond to the physical resource blocks.
  • the local type means a resource block structure of the same concept as the above described physical resource block.
  • the virtual resource blocks of the distribution type refers to a resource block structure in which resource blocks are distributed apart by a specific gap value.
  • the distribution type refers to a form in which virtual resource blocks of a new order are formed by mixing the order of physical resource blocks. Therefore, 1,2,3,... Of resource block numbers in the distribution type.
  • the increase in form has a distributed form that is mixed with the entire resource block from the actual physical resource block.
  • the virtual resource block configuration of the distribution type when continuous virtual resource blocks are configured to a specific receiver or a terminal by contiguous resource allocation, the actual physical channel is distributed over the entire band so that diversity gain, for example, frequency Diversity gain can be obtained.
  • Local / distribution allocation flags 524 and 535 may represent or represent two types of virtual resource blocks, for example, in one bit.
  • the discontinuous resource configuration may not need the diversity gain obtained in the distribution type because the resource allocation is not limited to a specific band and can selectively configure the resource in the entire band.
  • the discontinuous resource configuration since diversity gain is obtained by discontinuous resource configuration, there may be no gain obtained by the virtual resource allocation of the distribution type or no gain of the virtual resource allocation of the distribution type.
  • the continuous / discontinuous division field 532 is indicated by “0” 532 (b) as shown in Table 5 so that downlink resources of the DCI format 1A 530 when continuous resource allocation is performed.
  • the allocation field 533 and the local / distribution allocation flags 524 and 535 may represent two types of continuous resource allocation and virtual resource blocks, respectively.
  • FIG. 14 is a flowchart for transmitting a PDCCH in the determined DCI formats after determining the DCI formats of FIGS. 5D and 5E.
  • step S1400 it is determined whether continuous resource allocation is performed at the base station or higher layer (S1400).
  • the base station or a higher layer may determine whether to trigger the aperiodic SRS and the aperiodic CSI.
  • step S1410 If it is determined in step S1410 to allocate continuous resources, as shown in (E) of FIG. 5, continuous resource allocation is indicated as "0" in the continuous / discontinuous division field of DCI format 1A (530), and the downlink resource allocation field and the like.
  • Each type of local / distribution allocation flag is used to represent two types of continuous resource allocation and virtual resource blocks, respectively (S1412).
  • DCI format 1A 530 of FIG. 5E is formed by expressing corresponding information in the continuous / discontinuous division field, the downlink resource allocation field, the local / distribution allocation flag, and other fields (S1420). ).
  • step S1410 If it is determined in step S1410 that discontinuous resource allocation, as shown in FIG. 5D, the downlink resource allocation field of the DCI format 1A 530 and the local / distribution allocation flag are combined to express the discontinuous resource allocation ( S1414).
  • DCI format 1A of FIG. 5 (D) expressing discontinuous resource allocation by expressing corresponding information in the continuous / discontinuous division field and other fields and combining the downlink resource allocation field and the local / distribution allocation flag. 530 is configured (S1430).
  • the base station transmits the downlink grant selectively configured in step S1420 or S1430 to the terminal (S1440).
  • steps S1420 to S1440 may be the same as the method of transmitting the PDCCH described with reference to FIGS. 2 and 8.
  • FIG. 15 is a flowchart of processing PDCCHs of DCI formats of FIGS. 5D and 5E.
  • the UE decodes the downlink grant through blind decoding after receiving the downlink grant through the PDCCH (S1510).
  • step S1520 If it is determined in step S1520 that the continuous resource allocation, the resource allocation field and the local / distribution allocation flag in the DCI format 1A of Fig. 5E is interpreted (S1530).
  • the continuous resource allocation information is interpreted in the resource allocation field of DCI format 1A of FIG. 5E, and the local type and distribution type of the virtual resource block in the local / distribution allocation flag One of them can be interpreted.
  • step S1520 if it is determined in step S1520 that the discontinuous resource allocation, the resource allocation field and the local / distribution allocation flag in the DCI format 1A of Figure 5 (D) is interpreted (S1530).
  • the discontinuous resource allocation information may be analyzed by combining the resource allocation field of the DCI format 1A and the local / distribution allocation flag of FIG. 5D.
  • 11 is a block diagram of a base station according to another embodiment for generating downlink control information.
  • a codeword generator 1105 in the signal generator 1190, a codeword generator 1105, a scrambling unit 1110 and 1119, a modulation mapper 1120 and 1129, and a layer mapper
  • the layer mapper 1130, the precoding unit 1140, the resource element mappers 1150 and 1159, and the OFDM signal generators 1160 and 1169 may exist as separate modules, and two or more may be combined. It can work as a module.
  • the control information in which the cyclic redundancy check (CRC) is added to the control information described above is input to the signal generator 990.
  • CRC cyclic redundancy check
  • the control information added with the CRC includes a codeword generator 1105, a scrambling unit 1110 and 1119, a modulation mapper 1120 and 929, a layer mapper 1130, and a precoding unit.
  • 1140, the RE mappers 1150 and 1159, and the OFDM signal generators 1160 and 1169 are generated as OFDM signals and transmitted to the terminal through an antenna.
  • precoding may be omitted, and thus the input and output of the precoding may be the same.
  • the codeword may not be generated after multiple paths.
  • Tailbiting convolutional coding TCC
  • RM operation related to rate matching
  • FIG. 12 is a block diagram of a terminal according to another embodiment.
  • a terminal receives a signal from a base station through an antenna.
  • the demodulation unit 1220 provides a function of demodulating the received signal.
  • demodulation is performed by the OFDM scheme.
  • the base station may demodulate according to the corresponding scheme according to whether the signal generated by the base station is the FDD scheme or the TDD scheme.
  • the demodulated signal is descrambled by the descrambling unit 1230 to generate a codeword of a predetermined length, and the codeword decoding unit 1240 restores the codeword back to predetermined control information.
  • This function may be performed at the signal decoder 1290 at once, or may operate independently or sequentially in two or more modules.
  • control information is analyzed from the restored information in the upper layer than the physical layer in which the signal is restored.
  • FIG. 13 is a block diagram schematically illustrating a wireless communication system in which an embodiment of the present invention is implemented.
  • the base station 1310 includes a signal processor 1311, a memory 1312, and an RF unit 1313.
  • the signal processor 1311 implements a function, a process, and / or a method necessary for processing the above-described control information.
  • the memory 1312 may be connected to the signal processor 1311 to store a protocol or parameter for processing control information and a transmission table for resource allocation.
  • the RF unit 1313 may be connected to the signal processor 1311 to transmit and / or receive a radio signal and include a plurality of antennas.
  • the terminal 1320 includes a signal processor 1321, a memory 1322, and an RF unit 1323.
  • the signal processor 1321 implements a function, a process, and / or a method necessary for processing the above-described control information.
  • the memory 1322 may be connected to the signal processor 1321 to store a protocol or parameter for processing control information and a signal transmission table identical to that held by the base station 1310 for resource allocation.
  • the RF unit 1323 may be connected to the signal processor 1321 to transmit and / or receive a radio signal and include a plurality of antennas.
  • the signal processors 1311 and 1321 may include an application-specific integrated circuit (ASIC), another chipset, a logic circuit, and / or a data processing device.
  • ASIC application-specific integrated circuit
  • the memories 1312 and 1322 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media and / or other storage devices.
  • the RF units 1313 and 1323 may include a baseband circuit for processing a radio signal.
  • the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
  • the module may be stored in the memories 1312 and 1322 and executed by the signal processors 1311 and 1321.
  • the memories 1312 and 1322 may be inside or outside the signal processors 1311 and 1321, and may be connected to the processors 1311 and 1321 by various well-known means.
  • Control information transmitted from the higher layer described in the present invention may be transmitted in a separate physical control channel, and may be updated periodically or aperiodically at the request of a base station or a terminal or according to a predetermined rule or indication. .

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

Abstract

La présente invention concerne un système de communication, et des procédés pour transmettre et traiter des informations de commande, et une station de base et un terminal associés.
PCT/KR2012/000186 2011-01-07 2012-01-06 Procédé pour transmettre des informations de commande dans un système de communication et station de base associée, et procédé pour traiter des informations de commande et terminal associé WO2012093912A2 (fr)

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KR20110001880 2011-01-07
KR10-2011-0001880 2011-01-07
KR1020110014304A KR20120080509A (ko) 2011-01-07 2011-02-17 통신 시스템에서 제어정보의 전송방법 및 그 기지국, 제어정보의 처리방법 및 그 단말
KR10-2011-0014304 2011-02-17

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2017026873A1 (fr) * 2015-08-13 2017-02-16 엘지전자 주식회사 Procédé pour rapporter des informations d'état de canal d'un terminal dans un système de communication sans fil et dispositif utilisant le procédé

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US8693383B2 (en) * 2005-03-29 2014-04-08 Qualcomm Incorporated Method and apparatus for high rate data transmission in wireless communication
KR100943613B1 (ko) * 2005-11-22 2010-02-24 삼성전자주식회사 통신 시스템에서 상향링크 스케줄링을 위한 장치 및 방법
JP2012519410A (ja) * 2009-03-04 2012-08-23 エルジー エレクトロニクス インコーポレイティド 多重搬送波システムにおけるチャネル状態報告方法及び装置
KR101715397B1 (ko) * 2009-04-22 2017-03-13 엘지전자 주식회사 무선 통신 시스템에서 참조신호 전송 장치 및 방법

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017026873A1 (fr) * 2015-08-13 2017-02-16 엘지전자 주식회사 Procédé pour rapporter des informations d'état de canal d'un terminal dans un système de communication sans fil et dispositif utilisant le procédé
US10602389B2 (en) 2015-08-13 2020-03-24 Lg Electronics Inc. Method for reporting channel state information of terminal in wireless communication system and device using the method

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