WO2015072769A1 - Procédé et appareil de commande de compte rendu de marge de sécurité de puissance et de retransmission automatique hybride dans un système de communication mobile - Google Patents

Procédé et appareil de commande de compte rendu de marge de sécurité de puissance et de retransmission automatique hybride dans un système de communication mobile Download PDF

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Publication number
WO2015072769A1
WO2015072769A1 PCT/KR2014/010924 KR2014010924W WO2015072769A1 WO 2015072769 A1 WO2015072769 A1 WO 2015072769A1 KR 2014010924 W KR2014010924 W KR 2014010924W WO 2015072769 A1 WO2015072769 A1 WO 2015072769A1
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Prior art keywords
phr
subframe
terminal
tdd
dynamic
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PCT/KR2014/010924
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English (en)
Korean (ko)
Inventor
김우성
김성훈
리에샤우트게르트 잔 반
Original Assignee
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from KR1020140032849A external-priority patent/KR102221332B1/ko
Application filed by 삼성전자 주식회사 filed Critical 삼성전자 주식회사
Priority to EP14861216.1A priority Critical patent/EP3099101B1/fr
Priority to US15/036,652 priority patent/US10326562B2/en
Priority to CN201480062305.3A priority patent/CN105723770B/zh
Publication of WO2015072769A1 publication Critical patent/WO2015072769A1/fr
Priority to US16/443,216 priority patent/US10880052B2/en

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    • 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
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/365—Power headroom reporting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • 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

Definitions

  • the present invention relates to a method and apparatus for controlling power headroom reporting (PHR) and hybrid automatic retransmission (HARQ) in a mobile communication system.
  • PHR power headroom reporting
  • HARQ hybrid automatic retransmission
  • a mobile communication system has been developed for the purpose of providing communication while securing user mobility.
  • Such a mobile communication system has reached a stage capable of providing high-speed data communication service as well as voice communication due to the rapid development of technology.
  • LTE-A Long Term Evolution Advanced
  • 3GPP is working on specifications for Long Term Evolution Advanced (LTE-A).
  • LTE-A is a technology for implementing high-speed packet-based communication having a transmission rate of up to 100 Mbps.
  • various methods are discussed. For example, a method of simplifying a network structure to reduce the number of nodes located on a communication path or a method of bringing wireless protocols as close to the wireless channel as possible is discussed.
  • the data service unlike the voice service, is determined according to the amount of data to be transmitted and the channel conditions and resources that can be allocated. Therefore, in a wireless communication system such as a mobile communication system, management such as allocating transmission resources is performed in consideration of the amount of resources to be transmitted by the scheduler, the situation of the channel and the amount of data. This is the same in LTE, one of the next generation mobile communication systems, and a scheduler located in a base station manages and allocates radio transmission resources.
  • LTE-Advanced LTE-Advanced
  • LTE-A Long Term Evolution-Advanced
  • UE terminal
  • eNB base station
  • the secondary carrier uses a primary carrier and one or more subcarriers.
  • the transmission amount can be significantly increased by the number of carriers.
  • a primary carrier is called a primary cell (PCell) and a secondary carrier is called a secondary cell (SCell).
  • PCell primary cell
  • SCell secondary cell
  • 3GPP Rel-12 is progressing as a work item standard for enhanced TDD Interference Management and Traffic Adaptation (eIMTA).
  • eIMTA enhanced TDD Interference Management and Traffic Adaptation
  • An embodiment of the present invention is to provide a method and apparatus for processing PHR and HARQ of serving cells having dynamic TDD configuration information of a mobile communication system.
  • the technical problem of the present invention is to provide a method and apparatus for effectively controlling the measurement interval and DRX of the serving cells and processing HARQ when using the serving cells using different duplexing modes as carrier aggregation.
  • determining whether to operate in a dynamic time division duplexer (TDD, time division duplexer) mode when operating in a dynamic TDD mode, determining whether a service from a plurality of serving cells (serving cell) Step, if it is determined that the service from a plurality of serving cells, based on the Radio Resource Control (hereinafter referred to as RRC) message and Downlink Control Information (DCI) received from the base station (power headroom type (PH type) hereinafter) And determining and transmitting the information on the determined PH type using an extended Power Headroom Report (hereinafter, PHR) format.
  • RRC Radio Resource Control
  • DCI Downlink Control Information
  • the transmission and reception unit for performing data communication with at least one network node and the dynamic time division multiple access (hereinafter referred to as TDD, time division duplexer) mode operating in the dynamic TDD mode
  • TDD time division multiple access
  • RRC radio resource control
  • DCI downlink control information
  • a control unit configured to determine a power headroom type (PH type) based on the control unit and to transmit information on the determined PH type using an extended Power Headroom Report (hereinafter, PHR) format.
  • PHR Power Headroom Report
  • transmitting the first TDD configuration information, the second TDD configuration information to at least one terminal receiving a response message for the second TDD configuration information from the terminal, Receiving a response message, transmitting a third TDD configuration information to set a dynamic TDD mode to the terminal and receiving a MAC PDU including PHR information from the terminal, wherein the MAC PDU is fixed uplink sub
  • a method for receiving a PHR of a base station comprising a MAC CE including PH information for a frame and a MAC CE including PH information for a dynamic uplink subframe.
  • the first TDD configuration information and the second TDD configuration information are transmitted to a transceiver and at least one terminal for performing data communication with at least one network node, and the second terminal is transmitted from the terminal.
  • Receive a response message for the TDD configuration information when receiving the response message, transmits the third TDD configuration information to set the dynamic TDD mode to the terminal, and control to receive a MAC PDU including PHR information from the terminal
  • the MAC PDU includes a MAC CE including PH information for a fixed uplink subframe and a MAC CE including PH information for a dynamic uplink subframe.
  • the terminal in a method of power headroom report (PHR) of a terminal in a mobile communication system, when the PHR is triggered in the terminal, the terminal is a dynamic time division multiple access ( Determining whether to operate in a time division duplexer (hereinafter referred to as TDD) mode, and when operating in a dynamic TDD mode, transmitting a first PHR for a dynamic subframe and a second PHR for a fixed subframe to a base station. It provides a way to.
  • TDD time division duplexer
  • the apparatus When the PHR is triggered by the transceiver and the terminal for communicating with at least one network node, it is determined whether the terminal operates in a dynamic time division duplexer (TDD) mode, and the dynamic TDD mode.
  • TDD time division duplexer
  • the apparatus includes a control unit for controlling to transmit the first PHR for the dynamic subframe and the second PHR for the fixed subframe to the base station.
  • a dynamic time division duplexer (DDM) is connected to at least one terminal.
  • Setting a TDD) mode when the UE operates in a dynamic TDD mode, transmitting a PHR trigger message requesting transmission of a first PHR for a dynamic subframe and a second PHR for a fixed subframe to the base station; And receiving the PHR corresponding to the PHR trigger message.
  • the base station apparatus for receiving a power headroom report (PHR) in a mobile communication system
  • a dynamic time division duplexer (TDD) mode is set for a transceiver and at least one terminal for communicating with at least one network node, and the terminal operates in a dynamic TDD mode
  • TDD time division duplexer
  • HARQ hybrid automatic repeat request
  • HARQ hybrid automatic repeat request
  • TDD dynamic time division duplex
  • RTT round trip time
  • a mobile terminal system of the terminal for hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ) control from a transceiver and a base station for communicating with at least one network node
  • HARQ hybrid Automatic Repeat Request
  • a HARQ round-trip time based on a TDD configuration RRC message received from the base station
  • a controller configured to set a Trip Time (RTT) timer and to transmit information indicating a decoding result of data allocated to the HARQ processor to the base station during the HARQ RTT timer period.
  • a method and apparatus for efficiently controlling power headroom reporting (PHR) and hybrid automatic retransmission (HARQ) in a mobile communication system may be provided. Accordingly, according to an embodiment of the present invention, in the serving cells having the dynamic TDD mode, the UE may effectively report the PHR and increase the data transmission success rate through an efficient HARQ operation.
  • PHR power headroom reporting
  • HARQ hybrid automatic retransmission
  • the PH for the fixed subframe and the PH for the dynamic subframe may be simultaneously reported.
  • a terminal may provide a method and apparatus for providing information related to a transmission output to a base station and driving a discontinuous reception related timer for smooth scheduling in an eIMTA environment.
  • FIG. 1 is a diagram illustrating a structure of an LTE system to which the present invention is applied.
  • FIG. 2 is a diagram illustrating a radio protocol structure in an LTE system to which the present invention is applied.
  • 3 is a diagram illustrating carrier aggregation in a terminal.
  • FIG. 4 is a diagram illustrating a transmission direction and use of a subframe according to TDD configuration according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a frame structure in TDD according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating a dynamic TDD setting method according to an embodiment of the present invention.
  • FIG. 7 is a diagram illustrating neighbor cell interference according to dynamic TDD configuration according to an embodiment of the present invention.
  • FIG. 8 is a diagram illustrating a PHR format according to an embodiment of the present invention.
  • FIG. 9 is a diagram illustrating a PHR method according to dynamic TDD configuration according to an embodiment of the present invention.
  • FIG. 10 is a flowchart illustrating an operation of a terminal for explaining a PHR operation according to the application of FIG. 9.
  • FIG. 11 is a diagram illustrating HARQ operation according to static TDD configuration according to an embodiment of the present invention.
  • FIG. 12 is a diagram illustrating HARQ operation according to dynamic TDD configuration according to an embodiment of the present invention.
  • FIG. 13 is a flowchart illustrating an operation of a HARQ operation according to FIG. 12.
  • FIG. 14 is a flowchart illustrating operations of a terminal corresponding to another embodiment of the present invention described with reference to FIG. 12.
  • 15 is a block diagram of a terminal according to an embodiment of the present invention.
  • 16 is a block diagram of a base station according to an embodiment of the present invention.
  • An embodiment of the present invention relates to a method and apparatus for effectively controlling a power headroom report (PHR) of serving cells having different TDD configuration information in carrier aggregation or single carrier transmission of a mobile communication system.
  • PHR power headroom report
  • an embodiment of the present invention relates to a method and apparatus for processing hybrid automatic repeat reQuest (hereinafter referred to as HARQ) in carrier aggregation or single carrier transmission.
  • HARQ hybrid automatic repeat reQuest
  • An embodiment of the present invention relates to a method for providing information on a transmission output to a base station and performing an operation related to discontinuous reception when a TDD configuration is dynamically changed to satisfy the request.
  • a changeable subframe and an unchangeable subframe are set, and each is named as a fixed (FIXED) subframe and a flexible (FLEXIBLE) subframe.
  • the fixed subframe refers to a subframe that is not dynamically changed in TDD configuration information broadcast through a system information block (SIB) in the same manner as the existing static LTE TDD system.
  • SIB system information block
  • the transmission direction of the corresponding subframe does not change during operation between the terminal and the base station.
  • the dynamic subframe refers to a case where a corresponding subframe can be dynamically changed from an uplink subframe to a downlink subframe or a downlink subframe during an operation between the UE and the base station.
  • interference can be controlled by using the same TDD configuration as a neighbor base station.
  • interference increases in different transmission directions between neighboring cells. For example, in the case of uplink transmission of the UE in the current cell, the base station of the current cell may be affected by the base station downlink transmission in the neighbor cell, and conversely, in the case of downlink transmission of the UE in the current cell, May interfere.
  • the base station may require the terminal to increase the upstream output. For example, when a terminal currently transmitting uplink in a current cell is interfered with a downlink signal from a neighboring cell base station and thus the base station of the current cell cannot properly decode a signal received by the terminal, the base station causes the terminal to increase transmission power. The signal can then be raised to a level that can be interpreted.
  • the PHR includes information on power headroom that can be transmitted for all cells activated for the UE due to the current cell or carrier aggregation (CA).
  • CA carrier aggregation
  • the PHR may be periodically transmitted or the terminal may transmit PHR information to the base station according to a change in the path loss between the terminal and the base station.
  • the transmission output configuration according to the two interference situations is required.
  • the base station increases or decreases the uplink transmission power of the terminal according to the received signal strength or the frequency bandwidth designated to the terminal based on the PHR received from the terminal.
  • the uplink transmission output may be equally applied to all subframes configured for uplink transmission.
  • the subframe can be divided into a fixed subframe and a dynamic subframe, and since the interference with neighboring cells is constant in the fixed subframe, the same transmission output can be applied in the corresponding subframe. Since the interference with neighboring cells is constantly changing, it is necessary to continuously control the transmission output of the terminal in the corresponding subframe.
  • the UE In order to control the transmission output for these two subframes (fixed subframe and dynamic subframe), the UE should report the PHR corresponding to each subframe to the base station. Accordingly, hereinafter, a method for reporting a PHR of a terminal in a dynamic TDD configuration cell will be described.
  • a fixed TDD configuration cell is configured to receive an acknowledgment (ACK) in a specific uplink or downlink subframe for HARQ.
  • ACK acknowledgment
  • HARQ RTT HARQ Round Trip Time
  • k is assigned to the standard according to each TDD configuration because the uplink or downlink frame varies according to the TDD configuration.
  • the dynamic TDD configuration since the TDD configuration can be dynamically changed according to the signal of the physical layer, it is impossible to determine the k value based on the existing fixed TDD configuration cell.
  • k + 4 is determined based on the system information SIB1, and there is no change in the value of k + 4 over time. If TDD is set to 1 and the TDD setting value is changed to 3 during the k + 4 period, the value of k + 4 is changed.
  • the physical downlink control channel (PDCCH) must be continuously monitored during a specific subframe after k + 4 for retransmission reception. In the case of dynamic subframes, the total number of subframes to be monitored can be used. Is variable. Accordingly, an embodiment of the present invention describes an HARQ operation method and an example of a discontinuous reception operation in a dynamic TDD configuration cell.
  • LTE system Prior to describing the present invention, an LTE system, LTE protocol structure, and carrier aggregation technology will be briefly described.
  • FIG. 1 is a diagram illustrating a structure of an LTE system to which the present invention is applied.
  • a radio access network of an LTE system includes a next-generation base station (Evolved Node B, ENB, Node B, or base station) 105, 110, 115, and 120 and an MME 125. And S-GW 130 (Serving-Gateway).
  • the user equipment (hereinafter referred to as UE or terminal) 135 accesses an external network through the ENBs 105 to 120 and the S-GW 130.
  • the ENBs 105 to 120 correspond to existing Node Bs of a Universal Mobile Telecommunications System (UMTS) system.
  • the ENB is connected to the UE 135 by a radio channel and performs a more complicated role than the existing Node B.
  • all user traffic including real-time services such as Voice over IP (VoIP) over the Internet protocol, is serviced through a shared channel, so information on the status of buffers, available transmit power, and channel status of UEs is available. It is necessary to have a device for scheduling the collection of this, ENB (105 ⁇ 120) is in charge.
  • One ENB typically controls multiple cells.
  • the LTE system uses orthogonal frequency division multiplexing (hereinafter, referred to as OFDM) in a 20 MHz bandwidth as a radio access technology.
  • OFDM orthogonal frequency division multiplexing
  • AMC adaptive modulation & coding
  • the S-GW 130 is a device that provides a data bearer, and generates or removes a data bearer under the control of the MME 125.
  • the MME is a device that is in charge of various control functions as well as mobility management function for the terminal and is connected to a plurality of base stations.
  • FIG. 2 is a diagram illustrating a radio protocol structure in an LTE system to which the present invention is applied.
  • a wireless protocol of an LTE system includes packet data convergence protocols 205 and 240 (PDCP), radio link control 210 and 235 (RMC), and medium access control 215 and 230 (MAC) in a terminal and an ENB, respectively.
  • the PDCP Packet Data Convergence Protocol
  • RLC Radio Link control
  • the MACs 215 and 230 are connected to several RLC layer devices configured in one terminal, and multiplex RLC PDUs to MAC PDUs and demultiplex RLC PDUs from MAC PDUs.
  • the physical layers 220 and 225 channel-code and modulate higher layer data, make an OFDM symbol, and transmit it to a wireless channel, or demodulate, channel decode, and transmit the received OFDM symbol through a wireless channel to a higher layer.
  • the physical layer uses HARQ (Hybrid ARQ) for additional error correction, and the receiving end transmits the reception of the packet transmitted by the transmitting end as 1 bit. This is called HARQ ACK / NACK information.
  • Downlink HARQ ACK / NACK information for uplink transmission is transmitted through PHICH (Physical Hybrid-ARQ Indicator Channel) physical channel, and uplink HARQ ACK / NACK information for downlink transmission is PUCCH (Physical Uplink Control Channel) or PUSCH. (Physical Uplink Shared Channel) It may be transmitted through a physical channel.
  • PHICH Physical Hybrid-ARQ Indicator Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • 3 is a diagram for describing carrier aggregation in a terminal.
  • multiple carriers are generally transmitted and received over several frequency bands.
  • a carrier 315 having a center frequency of f1 and a carrier having a center frequency of f3 310 are transmitted from a base station 305
  • one terminal uses data from one of the two carriers. Transmitted and received.
  • a terminal having carrier aggregation capability may transmit and receive data from multiple carriers at the same time.
  • the base station 305 may increase the transmission speed of the terminal 330 by allocating more carriers to the terminal 330 having the carrier aggregation capability according to the situation.
  • carrier aggregation may be understood as a terminal transmitting and receiving data through multiple cells at the same time. will be. Through this, the maximum transmission rate is increased in proportion to the number of carriers integrated.
  • the UE receiving data through an arbitrary forward carrier or transmitting data through an arbitrary backward carrier means that a control channel provided by a cell corresponding to a center frequency and a frequency band that characterizes the carrier is provided. It has the same meaning as transmitting and receiving data using the data channel.
  • each subframe is divided into an uplink subframe, a downlink subframe, and a special subframe.
  • a downlink subframe denoted as 'D' is used to transmit downlink data
  • an uplink subframe denoted as 'U' is allocated to transmit uplink data.
  • the special subframe is denoted as 'S' and corresponds to a subframe between the downlink subframe and the uplink subframe.
  • the reason for placing the special subframe is that the timing at which each terminal completely receives a downlink subframe and the timing at which each terminal transmits uplink data differ depending on the position of the terminal. For example, a terminal far from the base station may receive data from the base station later. On the contrary, in order for the base station to receive data from the terminal within a specific time, the terminal must start transmitting data at an earlier time. In contrast, no special subframe is needed between the uplink subframe and the downlink subframe.
  • One radio frame 500 having a length of 10 ms consists of 10 subframes. Each subframe is 1 ms and consists of two slots.
  • the subframe 505 and the subframe 515 are downlink subframes
  • the subframe 510 and the subframe 535 are uplink subframes. That is, one of TDD configurations 0, 1, 2, and 6. Therefore, the subframes in between become special subframes.
  • Special subframes include downlink pilot timeslots (DwPTS, Downlink Pilot TimeSlot, 520), guard periods (hereinafter, GP, Guard Period, 525), uplink pilot timeslots (hereinafter, UpPTS Uplink pilot Timeslot, 530, divided into three sections.
  • DwPTS is a time interval for downlink reception
  • UpPTS is a time interval for uplink transmission.
  • GP does not transmit or receive any data.
  • Optimal DwPTS and UpPTS values may vary depending on the propagation environment. Therefore, the base station informs the terminal of the appropriate DwPTS and UpPTS values in advance, and the TDD configuration and the DwPTS and UpPTS values are included in the IE Tdd-Config of SystemInformationBlockType1 (hereinafter, SIB1) that is broadcast from the base station and transmitted to the terminal. do.
  • SIB1 SystemInformationBlockType1
  • the TDD setting may be broadcast to the terminal through Tdd-Config of the system information (SIB1) for interworking with the existing terminal.
  • the terminal may receive system information periodically and check the TDD setting of the base station (601).
  • the procedure is the same as the existing fixed TDD setting method, and enables the dynamic TDD setting operation through the second 602 and the third 603 setting in FIG. 6.
  • the UE configures TDD for dynamic TDD operation and triggers a corresponding operation.
  • This configuration provides a reference for the terminal to send an acknowledgment for the downlink transmission. Therefore, the minimum uplink subframe may be configured through the corresponding configuration.
  • RRC message a dedicated RRC configuration message
  • new TDD configuration information may be informed to the UE periodically through newly designated system information (eg, SIB x).
  • the UE informs the UE of the TDD configuration through the system information and the higher layer signal message, that is, the RRC message
  • the quick TDD configuration cannot be changed in units of subframes or radio frames.
  • the transmission period of SIB1 is 80 msec
  • the newly added system information (SIBx) is expected to be larger than that, and the delay of several tens of msec also occurs when informing the UE of the TDD setting through the RRC message. This is not suitable if you need to dynamically change the TDD setting in increments of 10, 20, 40, or 80 msec.
  • the TDD configuration information using the second RRC message is used for indicating a downlink hybrid automatic retransmission reference (DL HARQ reference) rather than a dynamic change of the TDD configuration.
  • DL HARQ reference downlink hybrid automatic retransmission reference
  • the UE can apply this faster.
  • the TDD setting may be changed every 10 msec, which is a radio frame unit.
  • the terminal receives the DCI including the new TDD configuration information, it may start communication with the base station using the corresponding TDD configuration from the next radio frame.
  • the L1 signaling message ie, the eIMTA command
  • C-RNTI terminal radio identifier
  • the terminal may receive the message periodically from the base station, but may also receive a corresponding command. For example, if the L1 signal message continuously transmitted in a specific subframe is not received in the 40 msec transmission period, the terminal determines that the L1 command reception has failed.
  • FIG. 6 an example of the TDD setting process of each of the three steps mentioned above will be described.
  • the TDD setting received through the first system information SIB1 is 0 (601)
  • two 'D' subframes, two 'S' frames, and the rest are shown in the first column. It is composed of 'U'.
  • What is considered to be a fixed subframe here is a subframe corresponding to 'D' in the first setting.
  • subframes 0 and 5 are configured as 'D' downlink subframes, and these two downlink subframes are defined as fixed downlink subframes. This is because the downlink subframe in the first configuration is always used as the downlink subframe regardless of the second and third TDD configuration processes.
  • the UE recognizes the second TDD configuration as 4 (TDD configuration 4 in FIG. 4) through the RRC message or through another system information (SIB x) (602).
  • the setting is represented by a second subframe column in FIG. 6.
  • the fixed subframe is limited to an uplink subframe set to 'U'.
  • subframes 2 and 3 are defined as fixed upward subframes.
  • subframe 1 is designated as fixed 'S' subframe as shown in the figure.
  • the 4, 7, 8, and 9 subframes become dynamic subframes that can be set to 'D' or 'U' during the third TDD configuration process using DCI (603).
  • DCI (603).
  • the subframes 0, 1, 2, and 5 have the same transmission direction in any configuration, there is no change in the transmission direction by the RRC message or the DCI, but In this case, it can be changed dynamically.
  • a UE operation for recognizing TDD configuration and an uplink subframe, a downlink subframe, and an S subframe may be defined as follows.
  • the UE When the UE camps on any serving cell, the UE receives first TDD configuration information from the serving cell and determines an uplink subframe, a downlink subframe, and an S subframe according to the first TDD configuration information. .
  • the determined subframes are all regarded as fixed subframes. Thereafter, if the dynamic TDD function of the terminal is configured by the base station at any point in time, the terminal acquires second TDD configuration information.
  • the UE fixes the subframes specified as the downlink subframes in the first TDD configuration information as the fixed downlink subframes, the subframes specified as the uplink subframe in the second TDD configuration information as the fixed uplink subframes, and fixes subframe 1 as S. It is determined as a subframe. The remaining subframes other than the fixed subframe are determined as dynamic subframes.
  • the terminal then monitors a physical downlink control channel (hereinafter, PDCCH) to obtain third TDD configuration information through DCI information.
  • PDCCH physical downlink control channel
  • the UE determines the type of the dynamic subframe by referring to the third TDD configuration information. For example, if the third TDD configuration information is 4, the type of dynamic subframes 6, 7 8, and 9 is determined as a downlink subframe with reference to subframes 6, 7, 8, and 9 of the third TDD configuration information.
  • FIG. 7 is a diagram illustrating neighbor cell interference due to a different uplink transmission direction from a neighbor cell in a dynamic TDD configuration.
  • the UE1 703 is in a state of transmitting uplink by accessing the base station cell 1 701
  • the UE2 704 is in a state of receiving downlink transmission by accessing the base station cell 2 702.
  • the cell 1 701 simultaneously receives the signal received from the UE1 703 and the interference signal received from the cell 2 702, which is an adjacent cell.
  • the transmission output of the neighbor cell 702 is relatively larger than the output of the terminal UE1 703, the cell 1 701 may not properly interpret (decode) a signal received from the UE1.
  • the signal transmitted by the UE1 703 to the cell 1 701 is very likely to be greater than the signal received by the UE2 704 from the cell 2 702. This is because the interval between the UE1 703 and the UE2 704 may be very close compared to the interval between the UE2 704 and the cell 2 702. In this case, similarly, the reception performance may be reduced due to uplink transmission of the neighbor cell terminal.
  • adjacent cell interference caused by such a difference in the transmission direction does not occur in the fixed subframe.
  • an alpha ( ⁇ ) value and a Po value may be differently set in a formula for obtaining a transmission output required for a physical uplink shared channel (PUSCH), that is, an uplink user channel.
  • PUSCH physical uplink shared channel
  • the corresponding values are reported to the terminal based on the received signal value measured in each subframe at the base station.
  • TPC transmission power control
  • TPC transmission power control
  • TPC transmission power control
  • TPC transmission power control
  • FIG. 8 illustrates a format of a power headroom report (hereinafter, PHR) message for reporting a terminal transmission power redundancy for controlling the terminal uplink transmission power.
  • the PHR format is divided into a normal (801) form and an extended (802) form.
  • the general PHR format it includes information on the transmission output margin of the UE for the current serving cell.
  • CA carrier aggregation
  • a terminal can simultaneously access and transmit up to five serving cells in one serving cell.
  • the PHR format 802 of the extended form is defined in a format in which only power headroom (PH) level information of one cell is transmitted.
  • the first octet is used as a bitmap indicating the presence or absence of a serving cell, and the octet located next is a power headroom required for the type 2 transmission by the PCell (primary cell). Contains information. Thereafter, it includes PH information necessary for type 1 transmission of the PCell.
  • the PH level information for the case where a physical uplink control channel (PUCCH) and a physical uplink data channel (PUSCH) are simultaneously transmitted in a subframe.
  • the PH information for the PCell is included, the PH information for the SCell (Secondary cell) designated in the first octet is sequentially listed. Along with each PH information, the maximum power that can be transmitted in the cell (PCmax) is also included.
  • an embodiment of the present invention provides a method and apparatus for reporting a PH for a fixed subframe and a PH for a dynamic subframe together.
  • PHR1 for reporting the PH for the dynamic subframe
  • PHR2 for reporting the PH for the fixed subframe
  • a method of reporting a PHR including a PH for a fixed subframe and a PH for a dynamic subframe by introducing a new PHR format.
  • the current PHR format does not allow reporting two PHs for the same serving cell, but if we define a new PHR format that can report two PHs for the same serving cell, then the PH and fixed subframes for the fixed subframe All PHs for a frame can be reported.
  • a new PHR format can be created by combining two PHR formats.
  • the new PHR format can be created by combining generic PHR and generic PHR, combining generic PHR and extended PHR, and combining extended PHR and extended PHR.
  • the current PHR format does not allow reporting two PHs for the same serving cell. If a new PHR format is introduced, the complexity of the terminal may increase. To define a new format in order to introduce PH for dynamic subframes, both must be defined newly, since a new format must be defined for each of the normal and extended formats. Therefore, it is desirable to report the PH by recycling the existing normal PHR format and extended PHR format.
  • the following embodiment of the present invention focuses on a method and apparatus for simultaneously providing a PH for a fixed subframe and a PH for a dynamic subframe by reusing an existing format.
  • the UE transmits two PHRs when the PHR is triggered.
  • the first PHR reports Type 1 PH for dynamic subframes
  • the second PHR reports PH for fixed subframes.
  • Type 2 PH is valid only for fixed subframes. (As described in the 'U' subframe configuration, the PUCCH is set only to a fixed subframe.)
  • step 903 the terminal 901 receives system information (SIB1) from the base station 902 and checks Tdd-Config information.
  • SIB1 system information
  • Tdd-Config information is specified in TS 36.331 as follows.
  • subframeAssignment represents TDD configuration information in FIG. 4, and one of a total of seven types can be set, and specialSubframePatterns is information on an 'S' subframe pattern.
  • the UE completes TDD configuration according to the first configuration (step 903) and accordingly, may perform an operation with the base station.
  • the terminal reports the PHR to the base station. In this case, it operates in the same manner as the existing LTE system of the TDD scheme, and reports the PH information of the uplink subframe set to 'U' to the base station according to the corresponding PHR format in the TDD subframe set in the first step (903). can do.
  • the UE 901 since the UE 901 should report the PH corresponding to TYPE2 according to whether the UE 901 can simultaneously transmit the PUCCH and the PUSCH in the corresponding uplink subframe, whether the PHR format is a normal PHR or an extended PHR It will be decided.
  • the base station 902 reports to the base station 902 using an extended PHR (extended PHR) format. Should be.
  • the extended PHR format usage and reporting method in the CA is specified in 3GPP standard TS 36.321.
  • the PHR procedure operates in the same manner as the existing terminal, and is performed regardless of dynamic TDD mode operation.
  • the terminal 901 is a terminal capable of operating according to the dynamic TDD configuration, and shows a process in which the base station cell 902 attempts a second TDD configuration for the dynamic TDD operation in the base station.
  • the terminal 901 is a terminal capable of performing an eIMTA service and may configure a second TDD through an RRC configuration message from the base station 902.
  • the UE fixes an uplink subframe set to 'U'.
  • the base station 902 transmits an RRC configuration message to the terminal 901 for an uplink subframe to be fixedly used among TDD settings currently being operated in the serving cell.
  • the terminal 901 transmits a response message to the RRC message to the base station. From the moment the base station 902 receives the response message, it starts operating in the dynamic TDD mode. In addition, the terminal 901 starts operation in the dynamic TDD mode with the RRC response message transmission.
  • the 'D' fixed downlink subframe specified through the first TDD configuration using SIB1 and the 'U' fixed uplink subframe indicated through the second TDD configuration through the RRC message are used. Except for the remaining FLEXIBLE (dynamic) subframes, a process of reconfiguring individual subframes in an uplink or downlink mode by using a DCI transmitted on a PDCCH may be repeated according to a traffic pattern of a cell.
  • the terminal 901 generates a PHR trigger and starts a PHR report to the base station during the dynamic TDD mode operation.
  • step 913 two PHR MAC CEs are stored and transmitted in one MAC PDU, and the first PHR MAC CE (PHR 1) receives Type 1 PH for the dynamic uplink subframe, and the second PHR MAC CE (PHR 2). ) Stores Type 1 PH and Type 2 PH for the fixed upward subframe.
  • Each PHR can be set via a different MAC CE or an existing MAC CE.
  • a new MAC CE identifier may be defined and used for the PHR for the dynamic subframe, and a new logical channel identifier should be assigned to the standard.
  • the PHR uses the MAC CE identifier (or logical channel identifier) of the PHR named and used in the current standard.
  • the receiver that is, the first PHR received by the base station, relates to a dynamic subframe.
  • the received PHR is understood to be for a fixed subframe. To this end, there must be a predetermined rule between the terminal and the base station. But it has the advantage of not requiring a separate standard definition.
  • the PHR1 relates to the dynamic subframe. As described above, only the information on the TYPE1 is needed since the physical uplink control channel (PUCCH) is not included in the corresponding subframe. Therefore, the PH is reported to the base station 902 using the general PHR format. However, when the terminal 901 is operating a plurality of serving cells of the base station 902 as a CA, the terminal should report the PH information on the serving cells that are active among the currently serving serving cells to the base station 902.
  • PUCCH physical uplink control channel
  • PHR2 reports to the base station 902 using the extended PHR format.
  • PHR2 of step 913 it should include PH information on a fixed subframe.
  • the physical uplink control channel (PUCCH) can be transmitted simultaneously with the physical uplink data channel (PUSCH)
  • PH information for TYPE2 can be included. Therefore, PHR2 uses the extended PHR format including TYPE1 PH and TYPE2 PH.
  • an extended PHR format including PHs of all activated serving cells is used.
  • FIG. 10 is a flowchart illustrating a UE operation procedure for a PHR reporting procedure for fixed and dynamic subframes under the dynamic TDD configuration of FIG. 9.
  • the dynamic TDD operation is configured with a third TDD through a physical layer control signal (DCI), and the UE refers to the third TDD configuration to establish a physical downlink shared channel (PDSCH) in a certain subframe.
  • DCI physical layer control signal
  • PDSCH physical downlink shared channel
  • Receiving and determining which subframe to transmit a Physical Uplink Shared Channel (PUSCH) may be collectively called.
  • Dynamic TDD mode operation starts or stops according to the instructions of the base station.
  • step 1003 the terminal checks whether two or more serving cells are operated. If the terminal operates as a plurality of serving cells of the base station and CA, it is necessary to transmit the PH information to the base station using the PHR extended format. If the UE operates in the dynamic TDD mode and is operating CA, in step 1004, a fixed uplink subframe is designated in the second TDD configuration using the RRC message. Determine TYPE 1 PH and TYPE2 PH for the fixed uplink subframe. In this case, TYPE 1 PH and TYPE PH for the fixed uplink subframe may be determined based on the RRC message for setting a TDD operation. The message for configuring the TDD operation may use a new format of system information (SIB x) as well as an RRC message.
  • SIB x system information
  • TYPE 1 PH and TYPE 2 PH for the fixed uplink subframe may be determined based on the first TDD configuration message (SIB 1). It may be. This application may also be applied to steps 1009 and below in the flowchart of FIG. 10.
  • step 1005 the UE determines TYPE 1 PH for an uplink subframe designated as a dynamic uplink subframe in a third TDD configuration by DCI. Since there is no control uplink channel in the dynamic uplink subframe, TYPE2 PH is not considered. TYPE 1 PH for the dynamic subframe may be determined based on the third TDD configuration by the DCI. However, when applying a new message for designating a dynamic subframe, TYPE 1 PH for the dynamic subframe may be determined based on the new message. In addition, when a problem such as not receiving the third TDD configuration message occurs, the TYPE1 PH for the dynamic subframe may be determined based on the second TDD configuration message. For example, TYPE 1 PH may be determined for a subframe not determined as a fixed subframe in the first TDD configuration message and the second TDD configuration message. This application may also be applied to steps 1009 and below in the flowchart of FIG. 10.
  • the UE includes TYPE1 PH for the dynamic subframes of all SCells in the active state for the current CA operation of the UE in a predetermined order, for example, in the first PHR MAC CE (PHR 1). do.
  • the UE includes the PH information for the fixed uplink subframe in the second PHR MAC CE (PHR 2) in a predetermined order using the extended PHR format.
  • PHR2 includes PH information for TYPE 1 and TYPE2 for the fixed uplink subframe in the extended PHR format.
  • PH information of all activated SCells is included in the corresponding extended PHR format.
  • step 1014 the corresponding PHR1 and PHR2 are included in one MAC PDU and transmitted to the base station.
  • step 1009 the UE operates with only one PCell without performing CA operation.
  • the UE checks whether the use of the extended PHR is indicated, proceeds to step 1015 if indicated, and proceeds to step 1010 if the extended PHR is not indicated. Whether to use the extended PHR indicates that the base station uses the predetermined control information to the terminal.
  • the base station instructs the terminal only one parameter indicating whether to use the extended PHR.
  • the parameter indicates a format for PHR MAC CE (PHR 2) for the fixed uplink subframe, and the format of PHR MAC CE (PHR 1) for the dynamic uplink subframe corresponds to the number of serving cells for which the dynamic TDD operation is configured. Therefore, the terminal determines itself. For example, if the number of serving cells in which the dynamic TDD operation is configured (or the serving cells in which the dynamic TDD operation is configured and currently active) is one, a general PHR format (reference numeral 801) is used. If the number of serving cells in which the dynamic TDD operation is configured (or the serving cells in which the dynamic TDD operation is configured and currently active) is two or more, the extended PHR format (reference numeral 802) is used.
  • the reason for signaling the format of PHR 2 separately is that even if only one serving cell is configured in the terminal, if simultaneous transmission of PUSCH and PUCCH is configured in the terminal, use of the extended PHR format may be necessary.
  • the PHR MAC CE includes one bit map octet and multiple Type 1 PH and PCMAX as shown at 802.
  • the UE sequentially includes, in PHR 1 of the extended PHR format, a dynamic subframe PH of a serving cell that is currently active and has dynamic TDD configured, in the order of serving cell index of the corresponding serving cell.
  • the UE determines the type 1 PH for the subframe specified as the fixed uplink subframe in the second TDD configuration.
  • the UE determines the TYPE 1 PH for the dynamic uplink subframe determined by the DCI (by the third TDD configuration).
  • the UE includes the TYPE1 PH information for the dynamic uplink subframe using the general PHR format to create the PHR1 for the dynamic uplink subframe.
  • the UE uses a general PHR format including TYPE1 PH to prepare PHR2 for the fixed uplink subframe.
  • the UE transmits the PHR1 and PHR2 MAC CEs in one MAC PDU to the base station as described above.
  • step 1015 it means that the use of the extended PHR format is indicated for PHR 2, and only one serving cell is configured, and the UE is assigned to the fixed uplink subframe specified by the second TDD configuration.
  • the UE determines the TYPE1 PH information for the dynamic uplink subframe specified by the third TDD configuration specified by the DCI.
  • the UE generates PHR1 using TYPE 1 PH content for the dynamic uplink subframe using the general PHR format.
  • step 1018 the UE creates a PHR2 report using an extended PHR format including TYPE 1 and TYPE2 for a fixed uplink subframe.
  • the two PHR1 and PHR2 are separated MAC CEs and are loaded on one MAC PDU and transmitted to the base station in step 1014.
  • step 1019 the UE does not operate in the dynamic TDD mode.
  • PH information of TYPE1 and TYPE2 is transmitted to the base station for all uplink subframes set according to the first TDD setting included in the system information SIB1 transmitted from the base station.
  • the UE is operating CA
  • the PH information of the activated SCell is transmitted in step 1021 using the extended PHR format.
  • the PH information of the activated Scell is transmitted in step 1021 using the general PHR format. send.
  • step 1021 only one PHR MAC CE is included in one MAC PDU.
  • PH is associated one-to-one with a specific subframe.
  • subframe (i) is defined as follows.
  • MAC PDUs containing PHR 1 and PHR 2 are transmitted in the subframe (i).
  • the subframe (i) is a fixed uplink subframe
  • PHtype1, c (i) is stored in PHR 2 (that is, the PH for the subframe i is stored)
  • PH type1, c (i + x) is stored.
  • (I + x) specifies the dynamic subframe closest in time to (i).
  • P CMAX, c (i + x ) is P CMAX, c for the sub-frame (i + x), the terminal is assumed to be assigned the same transmission resources and the sub-frame (i) in the sub-frame (i + x) MPR, A-MPR, P-MPR, After determining, P CMAX, c (i + x) is determined.
  • the description of these parameters and the method for determining P CMAX, c are as described in Specification 36.101.
  • a specific value shared by the terminal and the base station with P CMAX, c (i + x) for example, MPR, A-MPR, P-MPR, You can also use P CMAX, c , which is calculated when is set to zero.
  • a value determined by assuming a predetermined transmission resource allocation matter, for example, a situation in which the lowest MCS level and one transmission resource block is allocated may be used.
  • P O_PUSCH, c (j) _flex is set separately for a dynamic uplink subframe uses the received P O_PUSCH, c instructions from the base station.
  • f c (i + x) _flex is determined by applying a predetermined correction value to f c (i) _flex, which is a cumulative value of TPCs for the dynamic uplink subframe. For example, if the value f c (i) _flex is positive, a predetermined positive value may be applied, and if the negative value is negative, a predetermined negative value may be applied.
  • f c (i) _ flex is initialized to zero or a predetermined value when dynamic TDD is set. The value of the specific may be, for example, f c (i) that was used before the dynamic TDD configuration.
  • PH type 1 , c (i) _flex is stored in PHR 1 and PH type 1 , c (i + y) in PHR 2 Is housed.
  • I + y specifies the dynamic subframe closest in time to (i).
  • PH type1, c (i + y) _fix which is a fixed uplink subframe PH for the subframe (i + y), is calculated as follows.
  • P CMAX, c (i + y ) is an P CMAX, c for the sub-frame (i + y), the UE is assumed to be assigned the same transmission resources and the sub-frame (i) in the sub-frame (i + y)
  • P CMAX, c (i + y) is determined. Or a specific value shared by the terminal and the base station with P CMAX, c (i + y), for example, MPR, A-MPR, P-MPR, You can also use P CMAX, c , which is calculated when is set to zero.
  • a value determined by assuming a predetermined transmission resource allocation matter, for example, a situation in which the lowest MCS level and one transmission resource block is allocated may be used.
  • P O_PUSCH, c (j) _fix is set separately for the fixed uplink subframe and uses P O_PUSCH, c indicated by the base station.
  • the UE can use the P O_PUSCH, c that was used before to become a dynamic TDD set to P O_PUSCH, c (j) _fix .
  • f c (i + y) _fix is determined by applying a predetermined correction value to the accumulated value of f c (i) _fix of the TPC for the dynamic uplink subframe.
  • the correction value may be, for example, a predetermined positive value if f c (i) _fix is a positive value and a predetermined negative value if negative.
  • f c (i) _fix is initialized to f c (i) at that time if dynamic TDD is set.
  • the HARQ Round Trip Time Timer (HARQ RTT timer) is set differently according to the TDD setting used for the set cells.
  • the UE determines and drives the HARQ RTT timer value.
  • the HARQ RTT timer is set to 8 subframes, but if it is TDD, the HARQ RTT timer is set to k + 4 subframes.
  • k is a value between downlink data transmission and transmission of the corresponding HARQ feedback, and is defined according to the TDD configuration value.
  • the drx-RetransmissionTimer is driven and the PDCCH is continuously monitored.
  • the most appropriate dynamic TDD is set in consideration of whether to set the dynamic TDD in setting the k value.
  • the terminal receives data from the base station through the PDSCH (1101). Data down through the corresponding downlink data channel is allocated to a specific HARQ processor.
  • the HARQ RTT timer is set to a k + 4 subframe (1102).
  • the HARQ RTT timer refers to a minimum time until data is retransmitted, and the terminal may not be in an active time while the HARQ RTT timer is running.
  • k is the interval between the data transmitted in the downlink and the feedback from TDD and is broadcast in the base station included in the first TDD configuration, that is, SIB1 system information. K values are defined as shown in the table below.
  • the reason for this definition is that the positions of the uplink subframe, the downlink subframe, and the special subframe vary according to the TDD setting values of 0 to 6 as defined in the table, and thus data can be transmitted through the downlink. This is because the position of the uplink and the position of the uplink which can transmit the feedback value for this are different.
  • the HARQ RTT timer is driven according to the set value, and according to the received value, the terminal may send feedback indicating whether the data is properly received through the uplink control channel.
  • the UE drives the drx-RetranmissionTimer to receive the retransmission. Accordingly, the terminal is in the activation time, and continues to monitor the PDCCH subframe to receive the retransmission data from the base station.
  • the UE monitors up to n PDCCH subframes.
  • the PDCCH subframe is determined according to the configuration of SIB1 for the first TDD configuration (step 1104).
  • the PDCCH subframe includes a downlink subframe and an S subframe in which a PDCCH is set.
  • FIG. 12 is a diagram illustrating HARQ operation of a terminal in a cell operating in a dynamic TDD mode according to an embodiment of the present invention.
  • the UE receives the downlink data, allocates the corresponding data to a specific HARQ processor, sets the HARQ RTT timer by k + 4, and waits.
  • the k value may be determined according to the table according to the TDD set second by the RRC message (step 1202).
  • the second TDD configuration is characterized by a configuration used for determining a fixed uplink subframe or for determining a size of a forward HARQ soft buffer.
  • the method of determining the size of the HARQ soft buffer is as described in section 7.1.8 of the specification 36.213.
  • the size of the HARQ soft buffer is determined according to the total buffer size of the UE, the number of downlink HARQ processes, and the like, and the second TDD setting specifies the number of HARQ processes. Accordingly, the terminal configured with dynamic TDD is specified through another TDD configuration indicated through system information or an RRC control message, not a TDD configuration dynamically changed through DCI in determining k.
  • the second TDD configuration may include an RRC control message or a new format of system information (SIBx).
  • SIBx system information
  • the UE should continue to monitor the PDCCH if the data stored in the HARQ processor is not successfully decoded. At this time, the UE monitors the PDCCH for up to n subframes. Or, the terminal drives a retransmission timer whose value is n and monitors the PDCCH while the timer is running. The timer is subtracted by one every time a predetermined subframe elapses, and the subframe considered for driving the timer is a subframe specified as a PDCCH subframe by a second TDD setting.
  • the UE indicates a subframe indicated as a PDCCH subframe in TDD configuration 4 (ie, subframes 0, 1, and 4). , 5, 6, 7, 8, and 9 when five subframes have elapsed (that is, when subframe 7 is reached), the timer is stopped and PDCCH monitoring is terminated.
  • the UE monitors the PDCCH of the subframe indicated by the PDCCH subframe in the third TDD configuration while the timer is running.
  • the UE may perform subframes 1, 5, and 6, which are specified as a subframe or a S subframe in TDD configuration 0 among subframes 1 and 7. Monitor the PDCCH. If the UE does not know the third TDD configuration when the HARQ RTT timer expires, the UE may determine a subframe to monitor the PDCCH by applying the second TDD configuration.
  • the third TDD configuration may be configuration information included in the DCI.
  • the L1 signal message (ie, the eIMTA command) such as DCI is transmitted to the terminal in the above-mentioned 10, 20, 40, and 80 ms periods, and the terminal for the corresponding message can be distinguished by the terminal radio identifier (C-RNTI).
  • C-RNTI terminal radio identifier
  • the base station may transmit the L1 signal message to the terminal for a specific subframe in the last radio frame in the period.
  • the corresponding subframe may inform the UE in the form of a bitmap by using an RRC higher layer message.
  • the bitmap follows tdd-config specified in SIB1. For example, when tdd-config is 0, since the subframes capable of receiving the L1 signal may be 0, 1, 5, and 6, the RRC informs the UE of all 4 bits of map information. If the bit map is 1001, for example, subframes in which the terminal can receive the L1 command are 0 and 6. Therefore, the length of the corresponding bitmap can be determined according to tdd-config of SIB1.
  • the maximum length may be 9, in which tdd-config is 5, but the length may be 10 in the case of a PCell operating in FDD. This is because downlink transmission is possible in all subframes in FDD.
  • the base station does not send an RRC message based on the maximum bitmap length 9 or 10 and wants to set only a specific subframe among the subframes capable of downlink transmission, the maximum bit length is not necessary.
  • An n bit map corresponding to the maximum length of the subframe to be configured may be delivered to the terminal. In this case, the start downward subframe of the corresponding bitmap should be defined.
  • the base station assumes that the bitmap is applied in the fifth subframe of every radio frame. This bitmap corresponds to subframes 5 and 6. In this case, for example, if the bitmap is set to '01', the UE may receive the L1 signal message only in the sixth subframe.
  • the terminal may receive the message periodically from the base station, but may also receive a corresponding command. For example, if the L1 signal message continuously transmitted in a specific subframe is not received in the 40 msec transmission period, the terminal determines that the L1 command reception has failed.
  • FIG. 13 is a flowchart illustrating an operation of a terminal for a HARQ procedure according to the dynamic TDD operation of FIG. 12.
  • the UE checks whether a downlink data channel is allocated in a current subframe through a downlink control channel (PDCCH).
  • the UE checks whether the UE is operating in the dynamic TDD mode. If it is not operating in the dynamic TDD mode, it operates as in the existing static TDD mode.
  • the terminal that does not operate the existing dynamic TDD mode selects the k value according to the TDD configuration included in the system information SIB1 (step 1303).
  • the UE waits for k + 4 periods (step 1304). If the decoding fails, the PDCCH needs to be monitored to receive retransmission for n subframes (step 1305).
  • the n subframes may count subframes set to the downlink subframe and the S subframe according to the TDD setting specified in the system information.
  • the PDCCH is monitored in a subframe set to a downlink subframe and an S subframe according to the TDD configuration specified in the system information.
  • the k value is determined according to the second TDD configuration (step 1306).
  • the UE waits for k + 4 hours according to the second TDD mode.
  • the PDCCH is monitored to receive data retransmitted from the base station (step 1308). In this case, counting of n is performed only in a subframe specified as a PDCCH subframe in a second TDD configuration, and during a period specified by the n subframes, in a subframe indicated as a PDCCH subframe by a third TDD configuration. Receive the PDCCH to determine whether to schedule.
  • the UE determines whether to schedule the PDCCH by receiving the PDCCH in the subframes indicated by the PDCCH subframe by the second TDD configuration.
  • the UE applies the first TDD configuration to determine the length of the HARQ RTT timer and the actual length of time period defined by the retransmission timer (for example, if the timer is n, which subframes are to be included in n). Whether or not to receive the PDCCH while the retransmission timer is running.
  • the UE determines the length of the HARQ RTT timer and the actual length of time period defined by the retransmission timer by applying the second TDD configuration, and the PDCCH subframe is the third while the retransmission timer is driven. Determined by applying TDD settings.
  • FIG. 14 is a flowchart illustrating operations of a terminal corresponding to another embodiment of the present invention described with reference to FIG. 12.
  • the corresponding UE is configured for dynamic TDD or Otherwise, the operation of the terminal is different (step 1402).
  • the UE may operate as in the existing static TDD mode.
  • the terminal that does not operate the existing dynamic TDD mode selects the k value according to the TDD configuration included in the system information SIB1 (step 1403).
  • the terminal waits for k + 4 period after receiving the downlink data (step 1404).
  • the PDCCH needs to be monitored to receive retransmission for n subframes (step 1405).
  • the n subframes may count subframes set to the downlink subframe and the S subframe according to the TDD setting specified in the system information.
  • the PDCCH is monitored in a subframe set to a downlink subframe and an S subframe according to the TDD configuration specified in the system information.
  • the process proceeds to step 1406.
  • the terminal When the terminal is in operation by setting the dynamic TDD mode through the RRC control message, the terminal may be divided into a state in which an L1 signal message (eIMTA command) is operating or not received.
  • the K value is determined according to the current dynamic TDD setting depending on whether or not an L1 signal message (third TDD setting message, 3rd Config) is received, or the TDD setting specified in the System information block 1 (SIB1) when the command is not received.
  • SIB1 System information block 1
  • K value can be determined according to (step 1406). That is, when the L1 signal is received, the K value may be determined according to the TDD setting, and when the L1 signal is not received, the K value may be determined according to the system information.
  • the UE waits for a subframe period corresponding to K + 4 (step 1407). If decoding of the corresponding data fails, the downlink control channel (PDCCH) is monitored again for a predetermined period in order to receive retransmission for n subframes (step 1408). At this time, when the L1 signal message is received in the same manner as described above, the monitoring according to the TDD configuration of the message, otherwise, the downlink control channel is monitored in the downlink subframe according to the TDD configuration set in SIB1.
  • PDCCH downlink control channel
  • the monitoring period may monitor the downlink control channel for n periods previously designated in the upper layer based on the downlink subframe specified in the TDD configuration of SIB1. In this case, the monitoring period may monitor the downlink control channel for a predetermined period based on the direction subframe specified in the TDD configuration of the SIB1 regardless of whether the L1 signal message is received.
  • the number of downlink subframes of the TDD configuration specified in SIB1 is counted to monitor the corresponding subframes for 8 times. Therefore, since the number of downlink subframes in the TDD configuration of the SIB1 is equal to or greater than the number of downlink subframes of the TDD configuration designated by the L1 signal, the number of PDCCH subframes actually monitored during the n period may be the same or greater depending on whether the L1 signal reception is successful. have.
  • the UE waits for a K + 4 period according to the TDD configuration specified in the SIB1, and then monitors the downlink control channels in the number of downlink subframes according to the TDD configuration of the SIB1.
  • 15 is a block diagram illustrating an internal structure of a terminal according to an embodiment of the present invention.
  • the terminal transmits and receives data with the upper layer device 1510 and transmits and receives control messages through the control message processor 1515.
  • the terminal transmits data through the transmitter 1500 after multiplexing through the multiplexing device 1505 under the control of the controller 1520.
  • the terminal when receiving, the terminal receives the physical signal to the receiver 1500 under the control of the controller 1520, and then demultiplexes the received signal by the demultiplexing device 1505, the upper layer 1510 according to the message information, respectively Or the control message processor 1515.
  • the controller 1520 may control the overall operation of the terminal. According to an embodiment of the present disclosure, when the PHR is triggered in the terminal, the controller 1520 determines whether the terminal operates in a dynamic time division duplex (TDD) mode, and dynamically When operating in the TDD mode, it is possible to control to transmit the first PHR for the dynamic subframe and the second PHR for the fixed subframe to the base station. In this case, the first PHR and the second PHR may be stored in one MAC PDU and transmitted.
  • the first PHR includes a first type PH indicating power headroom (PH) level information for a case of transmitting only a physical uplink shared channel (PUSCH).
  • the 2 PHR may include PH level information for a subframe that simultaneously transmits the physical uplink control channel (PUCCH) and the uplink data channel.
  • PUCCH physical uplink control channel
  • the controller 1520 determines a first type PH and a second type PH for the fixed subframe based on a Radio Resource Control (RRC) message received from the base station to configure a TDD operation, and determines a dynamic TDD sub It may be controlled to determine a first type PH for the dynamic subframe based on downlink control information (DCI) received from the base station for frame setting.
  • RRC Radio Resource Control
  • DCI downlink control information
  • the controller 1520 determines whether the terminal is serviced from a plurality of serving cells, and if the terminal is serviced from a plurality of serving cells, the controller 1520 uses the PHR extension format to determine the first PHR and the first service. 2 PHR can be controlled to be stored.
  • the controller 1520 determines that the terminal operates in the dynamic TDD mode and is serviced by one serving cell, and determines whether the terminal uses the PHR extended format. If the terminal does not use the PHR extended format, Receives a first type PH for the fixed subframe determined based on a Radio Resource Control (RRC) message for TDD operation configuration using a PHR general format, and downlink control information for dynamic TDD subframe configuration
  • RRC Radio Resource Control
  • DCI Information
  • the controller 1520 uses the PHR extended format for the first type PH and the second type PH for the fixed subframe determined based on a Radio Resource Control (RRC) message received from the base station for TDD operation configuration.
  • RRC Radio Resource Control
  • the first type PH for the dynamic subframe determined based on downlink control information (DCI) received from the base station for dynamic TDD subframe setup using the PHR general format. Can be controlled.
  • DCI downlink control information
  • the controller 1520 is the first type PH and the second type PH for the uplink subframe based on the TDD configuration information included in the system information transmitted from the base station PHR including a may be controlled to be transmitted to the base station.
  • the controller 1520 allocates a downlink data channel received from a base station to a HARQ processor, and if the terminal operates in a dynamic time division duplex (TDD) mode, the TDD setting received from the base station
  • TDD dynamic time division duplex
  • a HARQ round trip time (RTT) timer may be set based on an RRC message and control may be performed to transmit information indicating a decoding result of data allocated to the HARQ processor to the base station during the HARQ RTT timer period.
  • the controller 1520 determines whether to receive downlink control information (DCI) for dynamic TDD configuration from the base station, and if the DCI is not received, the system information received from the base station (System) Information block 1, SIB1) may be controlled to set the HARQ RTT timer.
  • DCI downlink control information
  • SIB1 system information received from the base station
  • the controller 1520 determines a monitoring period based on the RRC message and downlink control information for dynamic TDD configuration. It may be controlled to determine a monitoring target subframe based on Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the controller 1520 controls to determine the monitoring target subframe based on system information block 1 (SIB1) received from the base station. can do.
  • SIB1 system information block 1
  • the controller 1520 may control to set the HARQ RTT timer based on system information (System Information Block 1, SIB1) received from the base station.
  • system information System Information Block 1, SIB1
  • the controller 1520 determines a monitoring period based on the RRC message and downlink control information for dynamic TDD configuration. It may be controlled to determine a monitoring target subframe based on Downlink Control Information (DCI).
  • DCI Downlink Control Information
  • the controller 1520 may control to determine the monitoring target subframe based on the RRC message.
  • the block for each configuration is for convenience of description and is not necessarily limited thereto.
  • each additional operation can be performed under the control of the controller 1520.
  • the terminal of FIG. 15 may perform the first embodiment and the second embodiment of the present invention.
  • the controller 1520 may control the operation of the terminal described with reference to FIGS. 1 to 14.
  • the base station apparatus of FIG. 16 includes a transceiver 1605, a controller 1610, a multiplexing and demultiplexing unit 1620, a control message processing unit 1635, various upper layer processing units 1625 and 1630, and a scheduler 1615. can do.
  • the transceiver 1605 transmits data and a predetermined control signal through a forward carrier and receives data and a predetermined control signal through a reverse carrier. When a plurality of carriers are set, the transceiver 1605 performs data transmission and reception and control signal transmission and reception to the plurality of carriers.
  • the multiplexing and demultiplexing unit 1620 may multiplex the data generated by the upper layer processing units 1625 and 1630 or the control message processing unit 1635, or demultiplex the data received by the transmitting and receiving unit 1605 to provide an appropriate upper layer processing unit 1625. 1630, the control message processor 1635, or the controller 1610.
  • the controller 1610 determines whether to apply the dynamic TDD configuration to a specific terminal and determines whether to include the configuration information in an RRCConnectionReconfiguration message.
  • the control message processing unit 1635 generates an RRC connection reset (RRCConnectionRecnofiguraiton) to be delivered to the terminal under the instruction of the controller, and delivers it to the lower layer.
  • RRC connection reset RRCConnectionRecnofiguraiton
  • the upper layer processing units 1625 and 1630 may be configured for each service for each terminal, and may process data generated from user services such as FTP or VoIP, and deliver the data to the multiplexing and demultiplexing unit 1620 or the multiplexing and demultiplexing unit 1620 Process the data delivered from) and deliver it to the service application of the upper layer.
  • the scheduler 1615 allocates a transmission resource to the terminal at an appropriate time in consideration of the buffer state, the channel state and the active time of the terminal, and processes the signal transmitted by the terminal to the transceiver or transmits the signal to the terminal. do.
  • the controller 1610 may control the overall operation of the base station.
  • the controller 1610 sets a dynamic time division duplex (TDD) mode to at least one terminal, and when the terminal operates in the dynamic TDD mode, a first subframe for the dynamic subframe.
  • TDD time division duplex
  • a PHR trigger message for requesting transmission of a PHR and a second PHR for a fixed subframe to the base station may be transmitted, and the PHR corresponding to the PHR trigger message may be received.

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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, selon un mode de réalisation, concerne un procédé servant à rendre compte d'un compte-rendu de réserve de puissance (que l'on appellera ci-après, PHR) d'un terminal et d'un appareil du terminal, le procédé comprenant les étapes consistant à : déterminer si le terminal opère en mode d'accès multiples à répartition dans le temps dynamique (que l'on appellera ci-après, duplexeur à répartition dans le temps, TDD) ; déterminer si le terminal reçoit un service de plusieurs cellules de desserte, lorsqu'il a été déterminé que le terminal opère en mode TDD dynamique ; déterminer un type de réserve de puissance (que l'on appellera ci-après, type de PH) sur la base d'un message de commande de ressource radio (que l'on appellera ci-après, RRC) et d'informations de commande de liaison descendante (DCI) reçues d'une station de base, lorsqu'il a été déterminé que le terminal reçoit un service de plusieurs cellules de desserte ; et transmettre des informations concernant le type de PH déterminé au moyen d'un format de PHR étendu. De plus, l'invention concerne un procédé de réception d'un PHR par une station de base et un appareil station de base pouvant instaurer un mode TDD dans le terminal et recevoir le PHR du terminal.
PCT/KR2014/010924 2013-11-13 2014-11-13 Procédé et appareil de commande de compte rendu de marge de sécurité de puissance et de retransmission automatique hybride dans un système de communication mobile WO2015072769A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP14861216.1A EP3099101B1 (fr) 2013-11-13 2014-11-13 Procédé et appareil de commande de compte rendu de marge de sécurité de puissance et de retransmission automatique hybride dans un système de communication mobile
US15/036,652 US10326562B2 (en) 2013-11-13 2014-11-13 Method and apparatus for controlling power headroom report and hybrid automatic retransmission in mobile communication system
CN201480062305.3A CN105723770B (zh) 2013-11-13 2014-11-13 用于控制功率余量报告和混合自动重传的方法和装置
US16/443,216 US10880052B2 (en) 2013-11-13 2019-06-17 Method and apparatus for controlling power headroom report and hybrid automatic retransmission in mobile communication system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20130137672 2013-11-13
KR10-2013-0137672 2013-11-13
KR1020140032849A KR102221332B1 (ko) 2013-11-13 2014-03-20 이동 통신 시스템에서 파워 헤드룸 보고 및 하이브리드 자동 재전송을 제어하는 방법 및 장치
KR10-2014-0032849 2014-03-20

Related Child Applications (2)

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US15/036,652 A-371-Of-International US10326562B2 (en) 2013-11-13 2014-11-13 Method and apparatus for controlling power headroom report and hybrid automatic retransmission in mobile communication system
US16/443,216 Continuation US10880052B2 (en) 2013-11-13 2019-06-17 Method and apparatus for controlling power headroom report and hybrid automatic retransmission in mobile communication system

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US11910364B2 (en) 2016-05-13 2024-02-20 Huawei Technologies Co., Ltd. Resource determining method, related device, and system

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