WO2016122111A1 - Appareil et procédé de réalisation d'une commande de puissance en liaison montante dans un système de communication sans fil prenant en charge l'agrégation de porteuses - Google Patents

Appareil et procédé de réalisation d'une commande de puissance en liaison montante dans un système de communication sans fil prenant en charge l'agrégation de porteuses Download PDF

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Publication number
WO2016122111A1
WO2016122111A1 PCT/KR2015/013575 KR2015013575W WO2016122111A1 WO 2016122111 A1 WO2016122111 A1 WO 2016122111A1 KR 2015013575 W KR2015013575 W KR 2015013575W WO 2016122111 A1 WO2016122111 A1 WO 2016122111A1
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WIPO (PCT)
Prior art keywords
tpc
dci
pucch
serving cell
tpc command
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PCT/KR2015/013575
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English (en)
Korean (ko)
Inventor
박동현
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주식회사 아이티엘
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Publication of WO2016122111A1 publication Critical patent/WO2016122111A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2211/00—Orthogonal indexing scheme relating to orthogonal multiplex systems
    • H04J2211/003—Orthogonal indexing scheme relating to orthogonal multiplex systems within particular systems or standards
    • H04J2211/005—Long term evolution [LTE]

Definitions

  • the present invention relates to wireless communication, and more particularly, to an apparatus and method for performing uplink power control in a wireless communication system supporting carrier aggregation.
  • CA Carrier Aggregation
  • CC component carriers
  • Each component carrier is defined by a bandwidth and a center frequency.
  • CA technology basically requires a primary serving cell (PCell), which serves as an anchor for communication, and a secondary serving cell (SCell).
  • PCell primary serving cell
  • SCell secondary serving cell
  • LTE long term evolution
  • PUCCH physical uplink control channel
  • a method in which the PUCCH is transmitted in the secondary serving cell may be mentioned. If the PUCCH is additionally configured in the secondary serving cell in addition to the primary serving cell, a small cell that reduces overhead due to uplink control information (UCI) concentrated in the primary serving cell and provides efficient uplink transmission is provided. It can help you with deployment. As a result, it is possible to implement reliable uplink control signal transmission.
  • UCI uplink control information
  • the uplink transmission power control of the terminal is a technique for solving interference or attenuation according to the distance between the terminal and the base station, and is also called a transmission power control (TPC) command.
  • the TPC command is signaling transmitted from the base station to the terminal to perform power control of a PUCCH or a physical uplink shared channel (PUSCH).
  • PUSCH physical uplink shared channel
  • the TPC command allows the base station to receive an uplink signal with a uniform power strength.
  • TPC commands for PUCCH or PUSCH are currently applied to both CA-supported terminals and CA-unsupported terminals through a common control region of the main serving cell, but TPC has not yet been applied for PUCCH (SCell) or PUSCH, which is a newly added feature in LTE systems. It is not discussed whether or not the order should be applied.
  • An object of the present invention is to provide an apparatus and method for performing uplink power control in a wireless communication system supporting carrier aggregation.
  • Another technical problem of the present invention is to provide a power control apparatus and method for uplink power control to effectively support the CA of the LTE system.
  • Another technical problem of the present invention is to provide a power control apparatus and method for a PUCCH or a PUSCH configured in a secondary serving cell like a main serving cell in a wireless communication system supporting CA.
  • a power control method by a terminal supporting carrier aggregation based on a plurality of serving cells.
  • the method includes a first transmission power control (TPC) index for an uplink control channel (hereinafter referred to as PUCCH (PCell)) on a primary serving cell (PCell) and a secondary serving cell.
  • TPC transmission power control
  • a power control apparatus supporting carrier aggregation based on a plurality of serving cells.
  • the apparatus includes an RF unit for receiving an upper layer message and a TPC command message from a base station, and an uplink control channel (hereinafter referred to as PUCCH (PCell)) on a primary serving cell (PCell) from the received message.
  • PUCCH uplink control channel
  • a first transmission power control (TPC) index and a second TPC index for an uplink control channel (hereinafter called PUCCH (SCell)) on a secondary serving cell (SCell) are identified, and the first Confirming a first TPC command corresponding to a TPC index and a second TPC command corresponding to the second TPC index, controlling power of the PUCCH (PCell) based on the first TPC command, and performing the second TPC command Based on the processor to control the power of the PUCCH (SCell).
  • PUCCH uplink control channel
  • the CA may be effectively supported by performing power control on the PUCCH or the PUSCH configured in the secondary serving cell.
  • FIG. 1 is a block diagram showing a wireless communication system to which the present invention is applied.
  • FIG. 3 is a flowchart in which uplink power control is performed according to an example of the present invention.
  • FIG. 4 illustrates an example of a correspondence relationship between a TPC index and a group TPC command.
  • FIG. 5 is a diagram illustrating a method of transmitting and monitoring a group TPC command according to an example of the present invention.
  • FIG. 6 is a diagram illustrating a method for transmitting and monitoring a group TPC command according to another example of the present invention.
  • FIG. 7 is a view for explaining a method for transmitting and monitoring a group TPC command according to another embodiment of the present invention.
  • FIG. 8 is a diagram illustrating a method of transmitting and monitoring a group TPC command according to another example of the present invention.
  • FIG. 9 illustrates an example of a correspondence relationship between a TPC index and a group TPC command, according to an exemplary embodiment.
  • FIG. 10 is a block diagram illustrating a terminal and a base station according to an embodiment.
  • the present specification describes a wireless communication network
  • the operation performed in the wireless communication network is performed in the process of controlling the network and transmitting data in the system (for example, the base station) that is in charge of the wireless communication network, or the corresponding wireless Work may be done at the terminal coupled to the network.
  • FIG. 1 is a block diagram showing a wireless communication system to which the present invention is applied.
  • the wireless communication system 10 is widely deployed to provide various communication services such as voice and packet data.
  • the wireless communication system 10 includes at least one base station (BS) 11.
  • Each base station 11 provides a communication service for a specific geographic area or frequency area and may be called a site.
  • the site may be divided into a plurality of regions 15a, 15b, and 15c, which may be called sectors, and the sectors may have different cell IDs.
  • the UE 12 may be fixed or mobile and may have a mobile station (MS), a mobile terminal (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, or a PDA. (personal digital assistant), wireless modem (wireless modem), a handheld device (handheld device) may be called other terms.
  • MS mobile station
  • MS mobile terminal
  • MT mobile terminal
  • UT user terminal
  • SS subscriber station
  • PDA personal digital assistant
  • wireless modem wireless modem
  • handheld device handheld device
  • the base station 11 generally refers to a station communicating with the terminal 12, and includes an evolved-nodeb (eNodeB), a base transceiver system (BTS), an access point, an femto base station, a femto eNodeB, and a household It may be called other terms such as a base station (Home eNodeB: HeNodeB), a relay, a remote radio head (RRH), and the like.
  • Cells 15a, 15b, and 15c should be interpreted in a comprehensive sense indicating some areas covered by the base station 11, and encompass all of the various coverage areas such as megacells, macrocells, microcells, picocells, and femtocells. to be.
  • downlink refers to a communication or communication path from the base station 11 to the terminal 12
  • uplink refers to a communication or communication path from the terminal 12 to the base station 11.
  • the transmitter may be part of the base station 11 and the receiver may be part of the terminal 12.
  • the transmitter may be part of the terminal 12 and the receiver may be part of the base station 11.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-FDMA
  • OFDM-FDMA OFDM-FDMA
  • OFDM-FDMA OFDM-FDMA
  • OFDM-TDMA OFDM-FDMA
  • Layers of a radio interface protocol between the terminal 12 and the base station 11 may be divided into a first layer L1, a second layer L2, and a third layer L3.
  • the physical layer belonging to the first layer provides an information transfer service using a physical channel.
  • the physical layer is connected to a higher layer, a media access control (MAC) layer, through a transport channel.
  • Data is transmitted through a transport channel between the MAC layer and the physical layer.
  • Transport channels are classified according to how data is transmitted over the air interface.
  • data is transmitted through a physical channel between different physical layers (that is, between a physical layer of a terminal and a base station).
  • the physical channel may be modulated by an orthogonal frequency division multiplexing (OFDM) scheme and utilizes space generated by time, frequency, and a plurality of antennas as radio resources.
  • OFDM orthogonal frequency division multiplexing
  • a physical downlink control channel (PDCCH) of a physical channel informs a terminal of resource allocation of a PCH (Paging CHannel) and DL-SCH (DownLink Shared CHannel) and HARQ (Hybrid Automatic Repeat Request) information related to the DL-SCH,
  • the terminal may carry an uplink scheduling grant informing of resource allocation of uplink transmission.
  • Physical Uplink Shared Channel (PDSCH) carries DL-SCH including downlink data.
  • the Physical Uplink Control CHannel (PUCCH) carries uplink control information such as HARQ ACK / NACK, scheduling request, and CQI for downlink transmission.
  • the PUSCH Physical Uplink Shared CHannel
  • UL-SCH Uplink Shared CHannel
  • the PUSCH may include channel state information (CSI) information such as HARQ ACK / NACK and CQI.
  • CSI channel state information
  • a serving cell may be defined as an element frequency band that may be aggregated by a CA based on a multiple component carrier system.
  • the serving cell includes a primary serving cell (PCell) and a secondary serving cell (SCell).
  • the primary serving cell is one that provides security input and non-access stratum (NAS) mobility information in a radio resource control (RRC) connection or re-establishment state. It means a serving cell.
  • RRC radio resource control
  • at least one cell may be configured to form a set of serving cells together with the main serving cell, wherein the at least one cell is called a secondary serving cell.
  • the set of serving cells configured for one terminal may consist of only one main serving cell or one main serving cell and at least one secondary serving cell. Each serving cell may be operated in an activated or deactivated state.
  • Uplink transmission power control of the terminal is performed by a TPC command.
  • the TPC command is signaling transmitted by the base station to the terminal to perform power control of the PUCCH or the PUSCH.
  • the PUCCH (SCell) is introduced in the LTE system, if a PUCCH (SCell) is additionally configured to the UE where the CA is configured, some uplink control information (UCI) transmitted only through the existing PUCCH (PCell) It may be sent to PUCCH (SCell).
  • UCI information may be sent on a PUSCH (SCell) according to the existence of an uplink grant. Accordingly, in order to effectively support a PUCCH (SCell) based CA, power control regarding the PUCCH (SCell) or the PUSCH is required like the main serving cell.
  • a main serving cell (PCell) and a secondary serving cell (SCell) are configured as CAs in a terminal.
  • the PUCCH region and the PUSCH region are divided on the frequency axis of each serving cell.
  • a signal of the PUCCH region and a signal of the PUSCH region may be controlled by its transmit power by a group TPC command.
  • the group TPC command is a TPC command for a terminal group. That is, the group TPC command includes a TPC command for each of the plurality of terminals.
  • the group TPC command may include a TPC command of the primary serving cell and the secondary serving cell for the same terminal.
  • Signals of the PUCCH region whose power is controlled by the group TPC command include periodic CSI reporting, HARQ-ACK, SR, and the like.
  • PUCCH (PCell) is controlled by TPC command 1 and PUCCH (SCell) is controlled by TPC command 2.
  • TPC command 1 PUCCH
  • SCell PUCCH
  • TPC command 2 PUCCH
  • the TPC commands 1 and 2 may be included in one group TPC command or may be included in different group TPC commands.
  • the TPC command 1 and the TPC command 2 may be provided by one downlink control information (DCI) or may be provided by different DCIs.
  • DCI downlink control information
  • the DCI is transmitted to the UE through the PDCCH in the common search space.
  • the group TPC command will be briefly described as controlling a PUCCH (PCell) (hereinafter referred to as PUCCH (PCell)) and a PUCCH (SCell) (hereinafter referred to as PUCCH (SCell)), but the group TPC command includes a main serving cell and a PUCCH ( Of course, the PUSCH can be controlled as well as the SCell.
  • PCell PUCCH
  • SCell PUCCH
  • the PUSCH can be controlled as well as the SCell.
  • FIG. 3 is a flowchart in which uplink power control is performed according to an example of the present invention.
  • the base station transmits a message of a higher layer that provides a TPC index to the terminal (S300).
  • the TPC index determines an index to a TPC command for the terminal (TPC index determines an index to TPC command for a given UE).
  • the TPC index may have an N or M value, and N and M are distinguished based on the DCI format. For example, in case of DCI format 3, the TPC index has an N value, and in case of DCI format 3A, the TPC index has an M value.
  • the upper layer message may be an RRC message.
  • the RRC message is TPC-PDCCH-Config, which is used to specify indexes and RNTIs for power control of PUCCH and PUSCH. Power control of the PUCCH and PUSCH may be set or released using TPC-PDCCH-Config.
  • a plurality of TPC indexes for a terminal may be assigned to a primary serving cell and a secondary serving cell of one terminal, and may correspond to respective TPC commands for the primary serving cell and the secondary serving cell.
  • the TPC index for the UE may include a first TPC index for PUCCH (PCell) and a second TPC index for PUCCH (SCell).
  • the second TPC index may be referred to as an index added to the first TPC index.
  • the upper layer message eg, RRC message or TPC-PDCCH-Config
  • the upper layer message for setting both the first TPC index and the second TPC index may have a structure as shown in the following table.
  • the tpc-Index field indicates [TPC-Index, TPC-Index_r13].
  • the TPC-Index field indicates a first TPC index and has an indexOfFormat3 or indexOfFormat3A value according to the DCI format.
  • indexOfFormat3 is a natural number of any one of 1 to 15
  • indexOfFormat3A is a natural number of any one of 1 to 31.
  • the TPC-Index_r13 field indicates the second TPC index and has an indexOfFormat3 or indexOfFormat3A value according to the DCI format.
  • indexOfFormat3 is a natural number of any one of 1 to 15
  • indexOfFormat3A is a natural number of any one of 1 to 31.
  • the terminal receiving the higher layer message uses the TPC-Index field as the TPC index for the TPC command for the PUCCH (PCell), and uses the TPC-Index_r13 field as the TPC index for the TPC command for the PUCCH (SCell). do. That is, the TPC index for the primary serving cell and the TPC index for the secondary serving cell may be distinguished.
  • the first TPC index and the second TPC index may be set independently or separately by the base station, and may be set to be associated with or the same as each other.
  • the UE may perform power control for PUCCH (PCell) and PUCCH (SCell) transmission using two TPC indexes.
  • the TPC-Index_r13 field may be replaced with a name including a term regarding a secondary serving cell such as TPC-Index_SCell.
  • the PUCCH for the primary serving cell and the PUCCH for the secondary serving cell may belong to one UE.
  • the terminal completes the TPC settings for the primary serving cell and secondary serving cell.
  • the base station transmits a group TPC command to the terminal (S305).
  • the group TPC command is included in the DCI and transmitted.
  • the length and contents of the group TPC command may differ depending on which DCI format is used for transmitting the group TPC command. Same as “TPC command number 1, TPC command number 2, ..., TPC command number N" for DCI format 3, "TPC command number 1, TPC command number 2, ..., TPC command” for DCI format 3A number M ".
  • N and M are the parameters described in Table 1.
  • both DCI formats 3 and 3A may be used to transmit a group TPC command, and other formats of DCI may also be used.
  • the group TPC command of various embodiments may be used in step S305.
  • the group TPC command is a single group TPC command, in which a single group TPC command is included in one DCI.
  • the DCI including the single group TPC command is transmitted mapped to the PDCCH scrambled by the TPC-PUCCH RNTI.
  • the DCI including the single group TPC command is transmitted on the primary serving cell (see FIG. 5).
  • both DCI format 3 and DCI format 3A have a specific length, which is referred to as 11 bits in FIG. 4.
  • UE1, UE2, UE3 perform PUCCH power control by one group TPC command. Only UE1 of UE1 to UE3 is configured with PUCCH (SCell), so that an additional TPC command (2 bits) for power control of PUCCH (SCell) is allocated to UE1. PUCCH (SCell) is not configured in the remaining UE2 and UE3. Every two bits in DCI format 3 are one TPC command, with each TPC command sequentially corresponding to a specific TPC index.
  • the first and second bits correspond to TPC index 1
  • the third and fourth bits correspond to TPC index 2
  • the fifth and sixth bits corresponds to TPC index 3
  • the 7,8th bit corresponds to TPC index 4.
  • TPC index 1 relates to PUCCH (PCell) of UE1
  • TPC index 4 relates to PUCCH (SCell) of UE1. This is because only UE1 is configured with a PUCCH (SCell), so that an additional TPC command (2 bits) for power control of the PUCCH (SCell) is allocated to UE1.
  • UE1 to UE6 perform PUCCH / PUSCH power control by one group TPC command.
  • PUCCH (SCell) is configured in UE1 and UE6 among UE1 to UE6, and an additional TPC command (1 bit) for power control of PUCCH (SCell) is allocated to UE1 and UE6, respectively.
  • Every 1 bit in DCI format 3A is a TPC command, with each TPC command sequentially corresponding to a specific TPC index.
  • TPC index 1 relates to PUCCH (PCell) of UE1
  • TPC index 3 relates to PUCCH (SCell) of UE1.
  • TPC index 7 relates to PUCCH (PCell) of UE6, and TPC index 8 relates to PUCCH (SCell) of UE6.
  • the group TPC command is a multi-group TPC command, which is a first group TPC command (power control for PUCCH (PCell)) and a second group TPC command (power for PUCCH (SCell)). Controls) are included in different DCIs. Both the first DCI including the first group TPC command and the second DCI including the second group TPC command are transmitted on the primary serving cell (see FIGS. 6 and 7).
  • the group TPC command is a multi-group TPC command, wherein the first group TPC command (power control for PUCCH (PCell)) and the second group TPC command (power control for PUCCH (SCell)) are different from each other. Included in The first DCI including the first group TPC command is transmitted on the primary serving cell, and the second DCI including the second group TPC command is transmitted on the secondary serving cell (see FIG. 8).
  • the terminal receives the DCI including the group TPC command, and performs power control of the PUCCH and the PUSCH in the primary serving cell and the secondary serving cell based on the group TPC command (S310).
  • the power control according to the group TPC command according to the present invention may be performed based on an accumulative power control mode. For example, when the terminal receives a group TPC command for the secondary serving cell configured with the PUCCH, the terminal accumulates the power control value of the PUCCH according to the group TPC command to the previous value.
  • the terminal may perform the accumulation operation based on the following equation.
  • Table 2 shows the group TPC command in case of DCI format 1A / 1B / 1D / 1 / 2A / 2B / 2C / 2D / 2/3.
  • Table 3 shows the mapping relationship with values
  • Table 3 shows the group TPC command in case of DCI format 3A. Represents a mapping relationship with a value.
  • Equation 1 g (i) represents a current PUCCH power control adjustment state.
  • M 1, and in TDD, M is the number of downlink subframes associated with one PUCCH transmission, and its value may vary depending on downlink HARQ timing.
  • k m is a value corresponding to downlink HARQ timing and indicates each of the associated downlink subframes. If m is the current subframe, it means nk m downlink subframe. The k m value is indicated, for example, in Table 4 below.
  • the terminal transmits the PUCCH and / or PUSCH to the base station on the primary serving cell and / or secondary serving cell based on the power controlled by step S310 (S315).
  • FIG. 5 is a diagram illustrating a method of transmitting and monitoring a group TPC command according to an example of the present invention.
  • a first TPC command for a PUCCH (PCell) and a second TPC command for a PUCCH (SCell) are included in a single group TPC command and mapped to one DCI. That is, this embodiment shares one DCI for power control of two PUCCHs (PCells) and PUCCHs (SCells).
  • the DCI including such a single group TPC command may be as shown in FIG. 4, for example.
  • DCI including a single group TPC command is mapped and transmitted to a PDCCH scrambled by TPC-PUCCH # 0 (RNTI).
  • PDCCH PDCCH with TPC-PUCCH RNTI
  • CSS common search space
  • the scrambled PDCCH is mapped to CSS of the main serving cell and transmitted to the terminal.
  • the UE monitors the CSS of the main serving cell in order to receive a TPC command to the PUCCH (SCell).
  • the present embodiment is different from the terminal configured with two dual connectivity (DCS) monitoring two CSS on PCell and PSCell (CSS).
  • Examples of PDCCHs mapped to common search spaces include PDCCH scrambled with Random Access-Radio Network Temporary Identifier (RA-RNTI) and PDCCH scrambled with C-RNTI (common-RNTI).
  • C-RNTI PDCCH scrambled with Temporary C-RNTI
  • PDCCH scrambled with TPC-PUSCH-RNTI PDCCH scrambled with eIMTA-RNTI (PDCCH with eIMTA-RNTI)
  • PDCCH scrambled with SPS-RNTI PDCCH with P-RNTI scrambled with P-RNTI
  • PDCCH scrambled with SI-RNTI RNTI PDCCH scrambled with SI-RNTI RNTI
  • FIG. 6 is a diagram illustrating a method for transmitting and monitoring a group TPC command according to another example of the present invention.
  • a first group TPC command for PUCCH (PCell) and a second group TPC command for PUCCH (SCell) are included in different DCIs.
  • the first DCI including the first group TPC command and the second DCI including the second group TPC command are both transmitted on the primary serving cell.
  • the first DCI is mapped to PDCCH1 scrambled with TPC-PUCCH # 0 RNTI
  • the second DCI is mapped to PDCCH2 scrambled with TPC-PUCCH # 0 RNTI and transmitted. That is, one TPC-PUCCH RNTI value is commonly applied to two PDCCHs having different TPC commands (or DCIs).
  • both PDCCH1 and PDCCH2 are mapped to CSS on the main serving cell. Since PDCCH1 and PDCCH2 are mapped to the same CSS and the same TPC-PUCCH RNTI value is applied, information for distinguishing PDCCH1 and PDCCH2 is necessary.
  • a carrier indicator field may be used to distinguish between PDCCH1 and PDCCH2.
  • the CIF may be included in the second DCI related to the PUCCH (SCell).
  • CIF may be used to distinguish between the first DCI and the second DCI.
  • the CIF may be used to distinguish the first group TPC command from the second group TPC command.
  • the base station can configure cross-carrier scheduling through RRC signaling to terminals configured with PUCCH (SCell) in the common search space similarly to cross carrier scheduling that can be configured in the UE-specific search space.
  • the CIF value activated in the DCI serves as an indicator indicating only the DCI information for the PUCCH (SCell), not the serving cell to which the PDSCH or the PUSCH is transmitted as in the UE-specific search space. Therefore, only 1 bit can be used as the CIF value.
  • the bit value for the CIF value may increase accordingly. For example, when the CIF value of 1 bit is 0, the UE recognizes that the corresponding DCI provides a group TPC command for PUCCH (SCell). On the other hand, if a 1-bit CIF value is 1, it is reserved.
  • cross-carrier scheduling in the common search space is set through RRC signaling, and is indicated (or activated) by a 3-bit CIF field or a 1-bit CIF field based on the setting of the RRC signaling. All unused fields in the CIF field are reserved. And the UE must monitor the CSS of the main serving cell in order to receive the group TPC command for the PUCCH (SCell).
  • the following is an RRC signaling information element for cross carrier scheduling.
  • the schedulingCellId value should be the serving cell index of the primary serving cell (that is, 0). And cif-presence is activated and only 3 bits or 1 bit is activated in DCI (format 3 / 3A).
  • CrossCarrierSchedulingConfig-r10 SEQUENCE ⁇ schedulingCellInfo-r10 CHOICE ⁇ own-r10 SEQUENCE ⁇ -No cross carrier scheduling cif-Presence-r10 BOOLEAN ⁇ , other-r10 SEQUENCE ⁇ -Cross carrier scheduling schedulingCellId-r10 ServCellIndex-r10, pdsch-Start-r10 INTEGER (1..4) ⁇ ⁇ ⁇ -ASN1STOP
  • the base station From the operation point of view of the base station and the terminal, the base station first generates a first DCI for power control of the PUCCH (PCell), and generates a second DCI for power control of the PUCCH (SCell). At this time, the base station includes a CIF indicating the primary serving cell in the second DCI.
  • the base station scrambles PDCCH1 including the first DCI to TPC-PUCCH RNTI and scrambles PDCCH2 including the second DCI to TPC-PUCCH RNTI.
  • the base station maps both the scrambled PDCCH1 and PDCCH2 to the CSS of the main serving cell and transmits them to the terminal. And the UE monitors the CSS of the main serving cell in order to receive a TPC command to the PUCCH (SCell).
  • cross-carrier scheduling is possible not only for PDCCHs mapped on UE-specific search space (USS) but also for PDCCHs mapped on CSS.
  • CIF UE-specific search space
  • FIG. 7 is a view for explaining a method for transmitting and monitoring a group TPC command according to another embodiment of the present invention. This is different in that the new RNTI is used for the PDCCH2 transmitted on the CSS of the main serving cell when compared with FIG. 6.
  • a first group TPC command for PUCCH (PCell) and a second group TPC command for PUCCH (SCell) are included in different DCIs.
  • the first DCI including the first group TPC command and the second DCI including the second group TPC command are both transmitted on the primary serving cell.
  • the first DCI is mapped to PDCCH1 scrambled with TPC-PUCCH # 0 RNTI
  • the second DCI is mapped to PDCCH2 scrambled with TPC-PUCCH-SCell RNTI and transmitted. That is, different RNTI values are applied to two PDCCHs having different TPC commands (or DCIs).
  • the TPC_PUCCH-SCell RNTI newly defined in the present embodiment for power control of the PUCCH (SCell) may be replaced with another term that performs the same function.
  • both PDCCH1 and PDCCH2 are mapped to CSS on the main serving cell.
  • PDCCH1 and PDCCH2 are mapped to the same CSS, different RNTI values are applied to scramble of the PDCCH, so that no separate information for distinguishing PDCCH1 and PDCCH2 is necessary. That is, since different RNTI values and different TPC index values are set and transmitted on the PDCCH, there is no need to set a separate CIF value.
  • the base station first generates a first DCI for power control of the PUCCH (PCell), and generates a second DCI for power control of the PUCCH (SCell).
  • the base station scrambles PDCCH1 including the first DCI to TPC-PUCCH RNTI and scrambles PDCCH2 including the second DCI to TPC-PUCCH-SCell RNTI.
  • the base station maps both the scrambled PDCCH1 and PDCCH2 to the CSS of the main serving cell and transmits them to the terminal.
  • the UE monitors the CSS of the primary serving cell using the TPC-PUCCH-SCell RNTI to receive a TPC command to the PUCCH (SCell).
  • FIG. 8 is a diagram illustrating a method of transmitting and monitoring a group TPC command according to another example of the present invention.
  • a first group TPC command for PUCCH (PCell) and a second group TPC command for PUCCH (SCell) are included in different DCIs.
  • the first DCI including the first group TPC command is transmitted on the primary serving cell, and the second DCI including the second group TPC command is transmitted on the secondary serving cell.
  • the first DCI is mapped to PDCCH1 scrambled with TPC-PUCCH RNTI, and PDCCH1 is mapped to CSS on the main serving cell.
  • the second DCI is mapped to PDCCH2 scrambled with TPC-PUCCH RNTI, and PDCCH2 is mapped to CSS on the secondary serving cell.
  • the PDCCH2 In order for the UE to receive the PDCCH2, it must first be known that the PDCCH2 is mapped to the CSS on the secondary serving cell.
  • the mapping of the PDCCH2 to the CSS on the secondary serving cell may be implied by the base station and the terminal, or may be explicitly informed by the base station to the terminal.
  • the UE may transmit capability information indicating that the UE can support a multimedia broadcast multicast service (MBMS) to the base station.
  • the base station receiving the capability information may map PDCCH2 to CSS on the secondary serving cell. have. That is, the performance information may be information that implicitly informs the base station to transmit PDCCH2 by mapping it to CSS on the secondary serving cell.
  • the terminal transmitting the capability information may implicitly know that it is necessary to monitor the CSS on the secondary serving cell in order to receive a group TPC command related to the PUCCH (SCell).
  • a physical channel related to MBMS a PMCH (Phsycal MBMS Channel) is transmitted on a carrier (or secondary serving cell) other than the primary serving cell, and PDCCH with M-RNTI (PDCCH) necessary for decoding the PMCH is not a primary serving cell.
  • PMCH is mapped to the CSS of the carrier (or secondary serving cell) to be transmitted. Therefore, in order to receive the MBMS, the MBMS capable terminal must monitor the CSS on the secondary serving cell in which the PMCH is transmitted, not the main serving cell.
  • the secondary serving cell includes an uplink component carrier (UL CC) for transmitting a PUCCH (SCell) and a downlink component carrier (DL CC) connected to the UL CC and SIB-2. Accordingly, the UE monitors the PDCCH scrambled with the TPC-PUCCH RNTI in the CSS on the DL CC.
  • UL CC uplink component carrier
  • DL CC downlink component carrier
  • PUCCH (SCell) is configured in the terminal To be.
  • the terminal can monitor the CSS on the secondary serving cell to receive a group TPC command (or DCI).
  • the UE sends a group TPC command for power control of the PUCCH (SCell). Monitor the CSS on the DL CC (SCell) associated with the UL CC (SCell) and the SIB-2 link to which the PUCCH (SCell) is transmitted to receive the.
  • Performance information indicating that the MBMS can be supported may be defined as shown in Table 6 below. It may be included in parameter information related to MBMS (MBMS-Parameters-r11).
  • MBMS-Parameters-r11 SEQUENCE ⁇ mbms-SCell-r11 ENUMERATED ⁇ supported ⁇ OPTIONAL, mbms-NonServingCell-r11 ENUMERATED ⁇ supported ⁇ OPTIONAL ⁇
  • parameter information related to MBMS may be information included in UE-EUTRA-Capability IE.
  • mbms-SCell-r11 is performance information indicating that MBMS can be supported in a secondary serving cell, and may be optionally included in parameter information related to MBMS, and when mbms-SCell-r11 indicates ⁇ supported ⁇ .
  • the terminal indicates that the secondary serving cell can support reception of the MBMS.
  • the terminal If the performance information indicating that the MBMS can be supported is displayed as "supported", the terminal expects to monitor the CSS on the secondary serving cell in order to receive a group TPC command on the PUCCH (SCell) later. This is because the terminal can already monitor the CSS on the secondary serving cell or non-serving cell (non-ServingCell).
  • the UE implicitly applies CSS on the secondary serving cell to receive PDCCH2. Can be monitored.
  • the base station also implicitly maps PDCCH2 to CSS on the secondary serving cell and transmits it to the terminal.
  • FIG. 9 illustrates an example of a correspondence relationship between a TPC index and a group TPC command, according to an exemplary embodiment.
  • the base station may set a TPC index value set by higher layer signaling to a value common to each terminal.
  • the TPC index value may be shared without setting the TPC index value differently for each UE.
  • This method is valid only for new terminals configured with a PUCCH (SCell) and is indicated in the same DCI format as a legacy terminal (FIG. 5) or when a PUCCH (SCell) is designated through another DCI (FIG. 5). 6, 7 or 8) can be applied.
  • the specific method is as follows.
  • the legacy terminal UE 2/4/5 is configured as in the prior art, and the new terminals UE 1/7/8 and UE6 / 10/11/12 are each set to the same value of the TPC index.
  • the base station may provide a power value by distinguishing the time between the terminals (e.g. UE1 / 7/8 or UE6 / 10/11/12).
  • the equation for classifying time is as follows.
  • K value is the number of terminals sharing one TPC index.
  • Different TPC index values can be provided to the.
  • Each terminal can share a bit value in the same TPC field through a subframe corresponding to each i value. According to this, the group TPC command value can be provided by utilizing the TPC index value more efficiently.
  • FIG. 10 is a block diagram illustrating a terminal and a base station according to an embodiment.
  • the terminal 1000 includes a processor 1010, an RF unit 1020, and a memory 1025.
  • the memory 1025 is connected to the processor 1010 and stores various information for driving the processor 1010.
  • the RF unit 1020 is connected to the processor 1010 and transmits and / or receives a radio signal.
  • the RF unit 1020 receives a message of a higher layer that gives a TPC index from the base station 1050.
  • the definition and function of the TPC index is as described in step S300.
  • the upper layer message may be an RRC message.
  • the RRC message is TPC-PDCCH-Config, as shown in Table 1, and is used to specify indexes and RNTIs for power control of PUCCH and PUSCH. Power control of the PUCCH and PUSCH may be set or released using TPC-PDCCH-Config.
  • the first TPC index and the second TPC index may be set independently or individually by the processor 1060 of the base station 1050, or may be set to be associated with or the same as each other.
  • the processor 1010 implements the functions, processes, and / or methods of the terminal proposed in FIGS. 2 to 8 of the present specification.
  • the processor 1010 completes the TPC setting for the primary serving cell and the secondary serving cell.
  • the processor 1010 uses the TPC-Index field as the TPC index for the TPC command for the PUCCH (PCell), and uses the TPC-Index_r13 field as the TPC index for the TPC command for the PUCCH (SCell). That is, the processor 1010 may distinguish the TPC index of the primary serving cell from the TPC index of the secondary serving cell.
  • the processor 1010 may perform power control for PUCCH (PCell) and PUCCH (SCell) transmission using two TPC indexes.
  • the RF unit 1020 receives a group TPC command from the base station 1050.
  • the group TPC command is included in the DCI and received. Definitions, functions, and structures regarding the group TPC command are as described in step S305.
  • the group TPC command of various embodiments may be used in step S305. 5 to 8 may be used as a method of transmitting a group TPC command.
  • the processor 1010 monitors the CSS of the primary serving cell to receive a TPC command to the PUCCH (SCell).
  • the processor 1010 monitors the CSS of the primary serving cell using the TPC-PUCCH-SCell RNTI to receive a TPC command to the PUCCH (SCell).
  • the processor 1010 may generate performance information indicating that the MBMS can be supported and transmit the performance information to the RF unit 1020, and the RF unit 1020 may transmit a message as shown in Table 2 to the base station 1050. .
  • the processor 1010 monitors the CSS of the secondary serving cell to receive the MBMS, but monitors the PDCCH2 regarding the group TPC command on the PUCCH (SCell) together in the CSS on the secondary serving cell.
  • the processor 1010 implicitly selects the PDCCH2 when the terminal 1000 supports the PUCCH (SCell) (or when the PUCCH (SCell) is configured), regardless of whether the terminal 1000 supports MBMS. You can monitor the CSS on the secondary serving cell to receive it.
  • the processor 1010 Upon receiving the group TPC command by monitoring, the processor 1010 performs power control of the PUCCH and the PUSCH in the primary and secondary serving cells based on the group TPC command. In detail, the processor 1010 may perform power control on the PUCCH of the secondary serving cell based on an cumulative power control mode. For example, when a group TPC command for the secondary serving cell configured with the PUCCH is received, the processor 1010 accumulates the power control value of the PUCCH according to the group TPC command to the previous value.
  • the RF unit 1065 transmits the PUCCH (PCell) and / or the PUCCH (SCell) from the terminal 1000 to the base station 1050 according to the power controlled by the group TPC command.
  • the base station 1050 includes a memory 1055, a processor 1060, and a radio frequency (RF) unit 1065.
  • the memory 1055 is connected to the processor 1060 and stores various information for driving the processor 1060.
  • the RF unit 1065 is connected to the processor 1060 and transmits and / or receives a radio signal.
  • the RF unit 1065 transmits a message of a higher layer that provides a TPC index to the terminal 1000.
  • the RF unit 1065 transmits a group TPC command to the terminal 1000 on the main serving cell and / or the secondary serving cell.
  • the RF unit 1065 may map a DCI including a single group TPC command to the PDCCH scrambled by the TPC-PUCCH RNTI and transmit it on the primary serving cell.
  • the RF unit 1065 receives performance information related to MBMS shown in Table 2 from the terminal 1000.
  • the RF unit 1065 receives a PUCCH (PCell) and / or a PUCCH (SCell) from the terminal 1000.
  • the processor 1060 implements the functions, processes, and / or methods related to the base stations of FIGS. 2-8 herein.
  • the processor 1060 generates one DCI for power control of two PUCCHs (PCells) and a PUCCH (SCell), scrambles the PDCCH including the generated DCIs with a TPC-PUCCH RNTI, and scrambles
  • the PDCCH is mapped to the CSS of the main serving cell.
  • the processor 1060 generates a first DCI for power control of the PUCCH (PCell), and generates a second DCI for power control of the PUCCH (SCell). At this time, the processor 1060 includes a CIF indicating the primary serving cell in the second DCI.
  • the processor 1060 scrambles PDCCH1 including the first DCI with the TPC-PUCCH RNTI, and scrambles PDCCH2 including the second DCI with the TPC-PUCCH RNTI.
  • the processor 1060 maps the scrambled PDCCH1 and PDCCH2 to the CSS of the main serving cell.
  • the processor 1060 generates a first DCI for power control of the PUCCH (PCell), and generates a second DCI for power control of the PUCCH (SCell).
  • the processor 1060 scrambles PDCCH1 including the first DCI with the TPC-PUCCH RNTI, and scrambles PDCCH2 including the second DCI with the TPC-PUCCH-SCell RNTI.
  • the processor 1060 maps the scrambled PDCCH1 and PDCCH2 to the CSS of the main serving cell.
  • the processor 1060 maps the PDCCH1 scrambled with the TPC-PUCCH RNTI to the CSS on the main serving cell, and the PDCCH2 scrambled with the TPC-PUCCH RNTI to the CSS on the secondary serving cell. This is a case where the RF unit 1060 receives performance information indicating that the MBMS can be supported from the terminal 1000.
  • the above-described processor may include an application-specific integrated circuit (ASIC), another chipset, a logic circuit and / or a data processing device.
  • the memory may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and / or other storage device.
  • the RF unit 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 memory and executed by a processor.
  • the memory may be internal or external to the processor and may be coupled to the processor by various well known means.

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

Abstract

La présente invention concerne un appareil et un procédé de réalisation d'une commande de puissance en liaison montante dans un système de communication sans fil. La présente invention concerne un procédé de commande de puissance qui comprend les étapes consistant à : recevoir un message de couche supérieure incluant un premier indice TPC par rapport à un PUCCH (PCell) et un second indice TPC par rapport à un PUCCH (SCell), en provenance d'une station de base ; recevoir un premier ordre TPC correspondant au premier indice TPC et un second ordre TPC correspondant au second indice TPC, en provenance de la station de base ; commander une puissance du PUCCH (PCell) sur la base du premier ordre TPC ; et commander une puissance du PUCCH (SCell) sur la base du second ordre TPC.
PCT/KR2015/013575 2015-01-30 2015-12-11 Appareil et procédé de réalisation d'une commande de puissance en liaison montante dans un système de communication sans fil prenant en charge l'agrégation de porteuses WO2016122111A1 (fr)

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KR1020150015415A KR102206361B1 (ko) 2015-01-30 2015-01-30 반송파 집성을 지원하는 무선통신 시스템에서 상향링크 전력제어를 수행하는 장치 및 방법
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Citations (5)

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Publication number Priority date Publication date Assignee Title
KR20100073976A (ko) * 2008-12-23 2010-07-01 엘지전자 주식회사 상향링크 전송 전력을 제어하는 방법 및 이를 위한 장치
US20110250918A1 (en) * 2010-04-07 2011-10-13 Yu-Chih Jen Communication device and method thereof
KR20110123199A (ko) * 2010-05-06 2011-11-14 엘지전자 주식회사 무선 통신 시스템에서 제어 정보의 전송 방법 및 장치
WO2013048570A1 (fr) * 2011-09-30 2013-04-04 Intel Corporation Signalisation de régulation de puissance en liaison montante avec agrégation de porteuses
WO2014077607A1 (fr) * 2012-11-14 2014-05-22 엘지전자 주식회사 Procédé d'exploitation d'un terminal dans un système d'agrégation de porteuses, et appareil utilisant ledit procédé

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100073976A (ko) * 2008-12-23 2010-07-01 엘지전자 주식회사 상향링크 전송 전력을 제어하는 방법 및 이를 위한 장치
US20110250918A1 (en) * 2010-04-07 2011-10-13 Yu-Chih Jen Communication device and method thereof
KR20110123199A (ko) * 2010-05-06 2011-11-14 엘지전자 주식회사 무선 통신 시스템에서 제어 정보의 전송 방법 및 장치
WO2013048570A1 (fr) * 2011-09-30 2013-04-04 Intel Corporation Signalisation de régulation de puissance en liaison montante avec agrégation de porteuses
WO2014077607A1 (fr) * 2012-11-14 2014-05-22 엘지전자 주식회사 Procédé d'exploitation d'un terminal dans un système d'agrégation de porteuses, et appareil utilisant ledit procédé

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