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WO2014050492A1 - Dispositif terminal, dispositif station de base, système de communication, procédé de commande de transmission en liaison montante et circuit intégré - Google Patents

Dispositif terminal, dispositif station de base, système de communication, procédé de commande de transmission en liaison montante et circuit intégré Download PDF

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Publication number
WO2014050492A1
WO2014050492A1 PCT/JP2013/074038 JP2013074038W WO2014050492A1 WO 2014050492 A1 WO2014050492 A1 WO 2014050492A1 JP 2013074038 W JP2013074038 W JP 2013074038W WO 2014050492 A1 WO2014050492 A1 WO 2014050492A1
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WIPO (PCT)
Prior art keywords
base station
transmission
terminal device
uplink
periodic
Prior art date
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PCT/JP2013/074038
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English (en)
Japanese (ja)
Inventor
克成 上村
恭之 加藤
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Sharp Corp
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Sharp Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H04L5/0082—Timing of allocation at predetermined intervals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower where the power saving management affects multiple terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • Embodiments of the present invention provide a terminal device, a base station device, a communication system, and uplink transmission control capable of reducing power consumption by improving the efficiency of periodic uplink transmission between the terminal device and the base station device. It relates to methods and integrated circuit technology.
  • 3GPP 3rd Generation Partnership Project
  • 3GPP which is a standardization project, has evolved to realize high-speed communication by adopting OFDM (Orthogonal Frequency Frequency Division) Multiplexing (OFDM) communication method and flexible scheduling in predetermined frequency and time units called resource blocks.
  • OFDM Orthogonal Frequency Frequency Division
  • EUTRA Universal Terrestrial Radio Access
  • Non-Patent Document 1 Non-Patent Document 1
  • Non-Patent Document 2 proposes a method for dynamically controlling activation and deactivation of an uplink sounding reference signal (Sounding Reference Signal (SRS)).
  • Non-Patent Document 3 proposes a method of stopping uplink transmission by forcibly terminating an uplink transmission timing timer for each transmission timing group.
  • SRS Sounding Reference Signal
  • a terminal device in EUTRA includes a radio resource request (also referred to as scheduling request (SR)) procedure for requesting uplink radio resources. Further, at this time, the terminal device includes a physical uplink control channel and a physical random access channel as the uplink channel used for the radio resource request, and when the uplink radio resource is required for the base station device, The terminal apparatus notifies the base station apparatus that uplink radio resources are necessary by transmitting either one of the channels.
  • SR scheduling request
  • the terminal apparatus includes a procedure (CSI report) for periodically reporting downlink channel state information (also referred to as Channel State Information (CSI)) that serves as a reference for downlink scheduling performed by the base station apparatus. .
  • CSI report for periodically reporting downlink channel state information (also referred to as Channel State Information (CSI)) that serves as a reference for downlink scheduling performed by the base station apparatus.
  • the terminal apparatus reports CSI to the base station apparatus using the physical uplink control channel.
  • the terminal device has a procedure for periodically transmitting the SRS to the base station device.
  • the SRS is received by the base station apparatus for the purpose of uplink channel state prediction of the terminal apparatus, adjustment of uplink transmission timing, uplink quality estimation, and the like.
  • Non-Patent Document 1 a sufficient application (for example, background communication (background traffic), instant message communication, or the like) sufficient with only a small amount of data packets is always operating in the terminal device.
  • the physical uplink used for the CQI report and / or the radio resource request because the radio resource of uplink data or downlink data actually used is small and the frequency of transmission and reception is low. If the radio resources of the control channel are always allocated to the terminal device, unnecessary uplink transmission opportunities increase, and thus the power consumption of the terminal device increases.
  • the downlink state cannot be estimated.
  • the problem is that the downlink throughput is reduced due to the inability to perform adaptive downlink scheduling, and another problem that the transmission delay increases due to the time taken to allocate radio resources for uplink data. .
  • the same problem that power consumption increases due to an increase in unnecessary uplink transmission opportunities due to the constant allocation of SRS radio resources to the terminal device occurs.
  • the SRS is not assigned to suppress unnecessary uplink transmission or the frequency of SRS transmission opportunities is reduced, the uplink state cannot be estimated in the base station apparatus, so adaptive uplink scheduling is performed.
  • Another problem that occurs is that the uplink throughput is lowered and the uplink is out-of-sync.
  • Non-Patent Document 2 the method of dynamically controlling the activation / deactivation of SRS cannot control the physical uplink control channel. Also, as in Non-Patent Document 3, the method of forcibly terminating the uplink transmission timing timer can release the physical uplink control channel and SRS resources, but when resuming uplink transmission. The problem of transmission delay that occurs in is not improved.
  • an object of an embodiment of the present invention is to provide a terminal device and a base station that can reduce power consumption by improving the efficiency of periodic uplink transmission between the terminal device and the base station device.
  • An object of the present invention is to provide a technology related to an apparatus, a communication system, an uplink transmission control method, and an integrated circuit.
  • the terminal device in the embodiment of the present invention is a terminal device in a communication system composed of a terminal device and a base station device, and means for communicating with the base station device using a plurality of different cells, and an uplink A means for receiving a control command related to transmission control from the base station apparatus, and a periodic downlink channel state information reporting process using an uplink control channel and a periodic uplink based on an instruction of the control command
  • a terminal apparatus in a communication system including a terminal apparatus and a base station apparatus, including means for temporarily stopping reference signal transmission processing for each cell.
  • the terminal device in the embodiment of the present invention is a terminal device in a communication system including a terminal device and a base station device, and means for communicating with the base station device using a plurality of different cells, and an uplink A means for receiving a control command including a timer related to transmission control from the base station apparatus, and periodic downlink channel state information reporting processing using an uplink control channel and periodic control based on an instruction of the control command Based on means for temporarily stopping uplink reference signal transmission processing for each cell and a timer, periodic downlink channel state information reporting processing and periodic uplink reference A terminal in a communication system composed of a terminal device and a base station device, including means for releasing radio resources related to signal transmission processing. It is a device.
  • the terminal device in the embodiment of the present invention is a terminal device in a communication system including a terminal device and a base station device, and means for communicating with the base station device using a plurality of different cells, and an uplink A means for receiving a control command including a timer related to transmission control from the base station apparatus, and periodic downlink channel state information reporting processing using an uplink control channel and periodic control based on an instruction of the control command Based on means for temporarily stopping uplink reference signal transmission processing for each cell and a timer, periodic downlink channel state information reporting processing and periodic uplink reference
  • a terminal apparatus in a communication system including a terminal apparatus and a base station apparatus, including means for resuming signal transmission processing.
  • the terminal apparatus suppresses unnecessary periodic uplink transmission, it is possible to reduce the power consumption of the terminal apparatus and improve the utilization efficiency of radio resources.
  • the base station apparatus in the embodiment of the present invention is a base station apparatus in a communication system composed of a terminal apparatus and a base station apparatus, and means for communicating with the terminal apparatus using a plurality of different cells, Control related to uplink transmission control in which periodic downlink channel state information reporting processing and periodic uplink reference signal transmission processing using the device uplink control channel are temporarily stopped for each cell
  • a base station apparatus in a communication system including a terminal apparatus and a base station apparatus, including means for transmitting a command to the terminal apparatus.
  • the base station apparatus in the embodiment of the present invention is a base station apparatus in a communication system composed of a terminal apparatus and a base station apparatus, and means for communicating with the terminal apparatus using a plurality of different cells, Timer related to uplink transmission control for temporarily stopping the reporting process of periodic downlink channel state information using the uplink control channel of the device and the transmission process of periodic uplink reference signal for each cell Is a base station device in a communication system including a terminal device and a base station device, including means for transmitting a control command including
  • the base station apparatus in the embodiment of the present invention is a base station apparatus in a communication system composed of a terminal apparatus and a base station apparatus, and means for communicating with the terminal apparatus using a plurality of different cells, Timer related to uplink transmission control for temporarily stopping the reporting process of periodic downlink channel state information using the uplink control channel of the device and the transmission process of periodic uplink reference signal for each cell
  • An uplink grant for resuming a periodic downlink channel state information reporting process and a periodic uplink reference signal transmission process, or a means for transmitting a control command including
  • a communication system comprising a terminal device and a base station device, including means for transmitting a downlink grant to the terminal device It is a Chikyoku apparatus.
  • the base station apparatus can reduce the power consumption of the terminal apparatus and improve the utilization efficiency of the radio resource by suppressing unnecessary periodic uplink transmission of the terminal apparatus.
  • the communication system is a communication system including a terminal device and a base station device.
  • the base station device communicates with the terminal device using a plurality of different cells, and a terminal.
  • Control related to uplink transmission control in which periodic downlink channel state information reporting processing and periodic uplink reference signal transmission processing using the device uplink control channel are temporarily stopped for each cell
  • Based on the instruction of the control command, periodic downlink channel state information reporting processing using the uplink control channel and periodic uplink Including means of a transmission processing of the reference signal to temporarily stop for each cell, a communication system comprising a terminal apparatus and the base station apparatus.
  • the base station apparatus can suppress unnecessary periodic uplink transmission of the terminal apparatus. Further, in the communication system, the terminal device can reduce power consumption and improve the utilization efficiency of radio resources based on the control command of the base station device.
  • An uplink transmission control method is an uplink transmission control method for a terminal apparatus in a communication system including a terminal apparatus and a base station apparatus, and uses a plurality of different cells to base station apparatus A step of communicating with the base station apparatus, a step of receiving a control command related to uplink transmission control from the base station apparatus, and periodic downlink channel state information using an uplink control channel based on an instruction of the control command
  • An uplink transmission control method for a terminal apparatus in a communication system including a terminal apparatus and a base station apparatus including a step of temporarily stopping a reporting process and a periodic uplink reference signal transmission process for each cell It is.
  • the terminal apparatus suppresses unnecessary periodic uplink transmission, it is possible to realize an uplink transmission control method that reduces the power consumption of the terminal apparatus and improves the utilization efficiency of radio resources.
  • An uplink transmission control method is an uplink transmission control method for a base station apparatus in a communication system including a terminal apparatus and a base station apparatus, and the terminal apparatus uses a plurality of different cells.
  • a control command for temporarily stopping, for each cell, the periodic downlink channel state information reporting process and the periodic uplink reference signal transmission process set in the terminal apparatus.
  • the base station apparatus realizes an uplink transmission control method for reducing power consumption of the terminal apparatus and improving utilization efficiency of radio resources by suppressing unnecessary periodic uplink transmission of the terminal apparatus. Can do.
  • the integrated circuit of the terminal device in the embodiment of the present invention is an integrated circuit of the terminal device in the communication system composed of the terminal device and the base station device, and communicates with the base station device using a plurality of different cells.
  • the terminal device integrated device suppresses unnecessary periodic uplink transmission, it is possible to reduce the power consumption of the terminal device and improve the utilization efficiency of radio resources.
  • An integrated circuit of a base station apparatus in an embodiment of the present invention is an integrated circuit of a base station apparatus in a communication system including a base station apparatus and a terminal apparatus, and communicates with the terminal apparatus using a plurality of different cells.
  • An integrated circuit of a base station apparatus in a communication system composed of a terminal apparatus and a base station apparatus that causes the base station apparatus to exhibit a series of functions including a function to
  • the integrated circuit of the base station apparatus can reduce the power consumption of the terminal apparatus and improve the utilization efficiency of radio resources by suppressing unnecessary periodic uplink transmission of the terminal apparatus.
  • each embodiment is disclosed in the technology of a terminal device, a base station device, a communication system, an uplink transmission control method, and an integrated circuit that realizes efficient periodic uplink transmission.
  • the communication method applicable to the above is not limited to a communication method that is upward compatible with EUTRA, such as EUTRA or Advanced EUTRA.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC -Can single carrier FDMA
  • the terminal device and the base station device aggregate (aggregate) frequencies (component carriers or frequency bands) of a plurality of different frequency bands (frequency bands) by carrier aggregation into one frequency (frequency band).
  • Component carriers include uplink component carriers corresponding to the uplink and downlink component carriers corresponding to the downlink.
  • a terminal device capable of carrier aggregation regards these as one frequency bandwidth of 100 MHz and performs transmission / reception.
  • the component carriers to be aggregated may be continuous frequencies, or may be frequencies at which all or part of them are discontinuous.
  • the usable frequency band is 800 MHz band, 2 GHz band, and 3.5 GHz band
  • one component carrier is transmitted in the 800 MHz band
  • another component carrier is transmitted in the 2 GHz band
  • another component carrier is transmitted in the 3.5 GHz band. It may be.
  • the frequency bandwidth of each component carrier may be a frequency bandwidth narrower than the receivable frequency bandwidth (for example, 20 MHz) of the terminal device, or the frequency bandwidth may be different.
  • the frequency bandwidth is preferably equal to one of the conventional cell frequency bandwidths in consideration of backward compatibility.
  • the number of uplink component carriers assigned (set or added) to the terminal device by the base station device is preferably equal to or less than the number of downlink component carriers.
  • a terminal device a base station device, a communication system, and an uplink that can reduce power consumption by improving the efficiency of periodic uplink transmission between the terminal device and the base station device.
  • a technique related to a transmission control method and an integrated circuit can be provided.
  • the communicable range of each frequency controlled by the base station apparatus is regarded as a cell.
  • the areas (cells) covered by each frequency may have different widths and different shapes. Moreover, the area to cover may differ for every frequency.
  • a terminal device operates in a cell and moves from one cell to another cell, it is a non-wireless connection (non-communication, idle state, RRC_IDLE) cell reselection procedure, a wireless connection (communication, The connected state (RRC_CONNECTED) moves to another suitable cell by the handover procedure.
  • a suitable cell generally indicates a cell in which access to a terminal apparatus is not prohibited and the downlink reception quality is the best.
  • carrier aggregation is communication by a plurality of cells using a plurality of component carriers (frequency bands), and is also referred to as cell aggregation.
  • the terminal device may be wirelessly connected to the base station device via a relay station device (or repeater) for each frequency. That is, the base station apparatus of each embodiment of the present invention can be replaced with a relay station apparatus.
  • the base station device defined by 3GPP is called Node B (NodeB), and the base station device in EUTRA and Advanced EUTRA is called eNodeB (eNodeB).
  • a terminal device in EUTRA and Advanced EUTRA defined by 3GPP is referred to as a UE (User Equipment).
  • the base station apparatus manages a cell, which is an area in which the terminal apparatus can communicate with the base station apparatus, for each frequency.
  • a cell is also referred to as a macro cell, a femto cell, a pico cell, or a nano cell depending on the size of an area that can communicate with a terminal device.
  • the terminal device can communicate with a certain base station device, the cell used for communication with the terminal device among the cells of the base station device is a serving cell (Serving cell), and other cells Is referred to as a neighbor cell.
  • serving cell serving cell
  • a cell composed of an uplink component carrier that is first accessed by a terminal device and a downlink component carrier that is connected to the uplink component carrier is referred to as a primary cell (PCell).
  • the cell comprised from component carriers other than a primary cell is called a secondary cell (SCell: Secondary cell).
  • the secondary cell has the activation / deactivation state, and the change of these states is In addition to being explicitly specified by the base station device, the state is changed based on a timer (deactivation timer) set in the terminal device for each component carrier.
  • the primary cell and the secondary cell are also collectively referred to as a serving cell.
  • the primary cell may be designated by the base station apparatus when the cell is changed by handover.
  • activation or deactivation of component carriers is configured to be controlled by an L2 (Layer 2) message that can be interpreted by a Layer 2 configuration task. . That is, activation or deactivation is controlled by a control command recognized by layer 2 after being decoded by the physical layer (layer 1).
  • the L2 message in EUTRA and Advanced EUTRA is notified by a control command (MAC control element: MAC Control Element) interpreted in the MAC layer.
  • the terminal device may stop monitoring the uplink grant and downlink grant (downlink assignment) used for scheduling the deactivated component carrier (secondary cell). That is, monitoring of the physical downlink control channel may be stopped. Further, the terminal device may stop the transmission of the sounding reference signal regarding the uplink of the deactivated component carrier (secondary cell). Further, the terminal apparatus may stop transmission of the physical uplink control channel for the uplink of the deactivated component carrier (secondary cell). Moreover, a terminal device may implement a measurement with a sampling rate lower than the activated state regarding the downlink of the deactivated component carrier (secondary cell).
  • the same uplink transmission timing A frequency (component carrier) is grouped, and a timer (transmission timing timer, time alignment timer; TA timer) that manages the state of uplink transmission timing for each group is configured.
  • a group in which uplink transmission timing represents the same frequency (component carrier) is also referred to as a transmission timing group (TAG, TA group).
  • a transmission timing group including the primary cell is also referred to as a primary transmission timing group
  • a transmission timing group including only the secondary cell is also referred to as a secondary transmission timing group.
  • a channel means a medium used for transmission of signals (signal information)
  • a physical channel means a physical medium used for transmission of signals (signal information).
  • a physical channel can be used synonymously with a signal.
  • the physical channel may be added in the future in EUTRA and Advanced EUTRA, or the structure and format of the physical channel may be changed or added. However, even if changed or added, the description of each embodiment of the present invention will be provided. It does not affect.
  • Radio frames In EUTRA and Advanced EUTRA, physical channel / physical signal scheduling is managed using radio frames.
  • One radio frame is 10 ms, and one radio frame is composed of 10 subframes. Further, one subframe is composed of two slots (that is, one subframe is 1 ms, and one slot is 0.5 ms).
  • resource blocks are used as a minimum scheduling unit in which physical channels are allocated.
  • a resource block is defined by a constant frequency region composed of a set of a plurality of subcarriers (for example, 12 subcarriers) and a region composed of a constant transmission time interval (1 slot) on the frequency axis.
  • the synchronization signal (Synchronization Signals) is composed of three types of primary synchronization signals and secondary synchronization signals composed of 31 types of codes arranged alternately in the frequency domain. 504 kinds of cell identifiers (physical cell ID (Physical Cell Identity; PCI)) for identifying the base station apparatus and frame timing for radio synchronization are shown by the combination.
  • the terminal device specifies the cell ID of the synchronization signal received by the cell search.
  • the physical broadcast information channel is transmitted for the purpose of notifying control parameters (broadcast information (system information); System information) that are commonly used by terminal devices in the cell. Broadcast information that is not notified on the physical broadcast information channel is transmitted as a layer 3 message (system information) on the physical downlink shared channel after the radio resource is notified on the physical downlink control channel.
  • a cell global identifier (CGI; Cell Global Identifier) indicating a cell-specific identifier, a tracking area identifier (TAI; Tracking Area Identifier) for managing a standby area by paging, random access setting information (such as a transmission timing timer), Common radio resource setting information and the like are notified.
  • the broadcast information is also used to notify access restriction information when accessing the cell and channel control settings commonly used by terminal devices accessing the cell.
  • Downlink reference signals are classified into multiple types according to their use.
  • cell-specific reference signals are pilot signals transmitted at a predetermined power for each cell, and are downlink reference signals that are periodically repeated in the frequency domain and the time domain based on a predetermined rule. It is.
  • the terminal device measures the reception quality for each cell by receiving the cell-specific RS.
  • the terminal apparatus also uses the cell-specific RS as a reference signal for demodulating the physical downlink control channel or the physical downlink shared channel transmitted simultaneously with the cell-specific RS.
  • a sequence used for the cell-specific RS a sequence that can be identified for each cell is used.
  • the downlink reference signal is also used for estimation of downlink propagation path fluctuation.
  • a downlink reference signal used for estimation of propagation path fluctuation is referred to as a channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • the downlink reference signal set individually for each terminal device is called UE specific Reference Signals (URS) or Dedicated RS (DRS), and demodulates the physical downlink control channel or the physical downlink shared channel. Referenced for the channel compensation process.
  • a physical downlink control channel is transmitted in several OFDM symbols (for example, 1 to 4 OFDM symbols) from the head of each subframe, and follows the scheduling of the base station apparatus to the terminal apparatus. It is used for the purpose of instructing radio resource allocation information and an adjustment amount for increase / decrease in transmission power.
  • the terminal apparatus monitors (monitors) a physical downlink control channel addressed to the terminal apparatus before transmitting / receiving a layer 3 message (paging, handover command, etc.) that is downlink data or downlink control data.
  • a layer 3 message paging, handover command, etc.
  • the physical downlink control channel may be configured to be transmitted in the area of the resource block allocated individually (dedicated) from the base station apparatus to the terminal apparatus, in addition to being transmitted by the ODFM symbol described above. Is possible.
  • the physical uplink control channel is a reception confirmation response (ACK / NACK; Acknowledgement / Negative Acknowledgment) or a downlink propagation path indicating the success or failure of decoding of data transmitted on the physical downlink shared channel.
  • (Channel state) information (CSI; Channel State Information), and a scheduling request (SR; Scheduling Request) which is an uplink radio resource allocation request (radio resource request).
  • CSI Channel state information
  • SR Scheduling Request
  • UCI Uplink Control Information
  • CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), PTI (Precoding Type Indicator), and RI (Rank Indicator).
  • CQI Channel Quality Indicator
  • PMI Precoding Matrix Indicator
  • PTI Precoding Type Indicator
  • RI Rank Indicator
  • the physical downlink shared channel (PDSCH: Physical Downlink Shared Channel) is also used to notify the terminal device of not only downlink data but also broadcast information (system information) not notified by the paging or physical broadcast information channel as a layer 3 message. Is done.
  • the radio resource allocation information of the physical downlink shared channel is indicated by the physical downlink control channel.
  • the physical downlink shared channel is transmitted after being arranged in an OFDM symbol other than the OFDM symbol through which the physical downlink control channel is transmitted. That is, the physical downlink shared channel and the physical downlink control channel are time division multiplexed within one subframe.
  • the physical uplink shared channel mainly transmits uplink data and uplink control data, and can also include control data such as downlink reception quality and ACK / NACK. In addition to uplink data, it is also used to notify the base station apparatus of uplink control information as a layer 3 message. Similarly to the downlink, the radio resource allocation information of the physical uplink shared channel is indicated by the physical downlink control channel.
  • the uplink reference signal (uplink reference signal; Uplink Reference Signal, uplink pilot signal, also called uplink pilot channel) is transmitted from the base station apparatus to the physical uplink control channel PUCCH and / or the physical uplink shared channel PUSCH.
  • Demodulation reference signal (DMRS; Demodulation Reference Signal) used for demodulation
  • base signal sounding reference signal, SRS
  • Sounding reference signals include a periodic sounding reference signal (Periodic SRS (P-SRS)) and an aperiodic sounding reference signal (Aperiodic SRS (A-SRS)).
  • the P-SRS is transmitted for each uplink cell at a period (interval) determined based on the setting related to P-SRS transmission from the base station apparatus (periodic sounding reference signal setting (P-SRS setting)).
  • the terminal device in which the P-SRS setting is set transmits the P-SRS periodically in a cell other than the secondary cell at the time of inactivation or the cell whose transmission timing timer is stopped.
  • the physical random access channel (PRACH; “Physical” Random “Access” Channel) is a channel used to notify a preamble sequence and has a guard time.
  • the preamble sequence is configured so as to express 6-bit information by preparing 64 types of sequences.
  • the physical random access channel is used as an access means for the terminal device to the base station device.
  • the terminal apparatus also transmits a radio resource request when the physical uplink control channel is not set, and transmission timing adjustment information (Timing Advance (TA)) necessary for matching the uplink transmission timing to the reception timing window of the base station apparatus. Is called a physical random access channel.
  • TA Transmission Advance
  • the terminal apparatus transmits a preamble sequence using the radio resource for the physical random access channel set by the base station apparatus.
  • the terminal device that has received the transmission timing adjustment information has a transmission timing timer (TA timer) that measures the effective time of the transmission timing adjustment information that is commonly set by the broadcast information (or set individually by the layer 3 message).
  • TA timer transmission timing timer
  • the terminal apparatus When the transmission timing timer expires, the terminal apparatus performs settings related to CQI report (including CSI and the like) settings and settings related to transmission of the physical uplink control channel and settings related to the periodic sounding reference signal, which are settings related to SR transmission. Apply default settings. Since the default setting is release, the terminal device substantially releases these settings. Further, the terminal apparatus does not perform transmission other than the random access channel for each cell for which the transmission timing timer has expired.
  • CQI report including CSI and the like
  • the terminal apparatus when the transmission timing timer is stopped, the terminal apparatus performs physical uplink control that is a setting related to CQI reporting (including CSI and the like) and a setting related to SR transmission for each cell for which the transmission timing timer is stopped.
  • the channel transmission setting and the setting related to the periodic sounding reference signal are maintained, but transmission other than the random access channel is not performed. In other words, the terminal apparatus does not perform transmission other than the random access channel for each cell that has not timed the transmission timing timer.
  • the layer 3 message is a control plane (Control-plane) message exchanged in the RRC (Radio Resource Control) layer between the terminal device and the base station device, and can be used synonymously with RRC signaling or RRC message. Since other physical channels are not related to each embodiment of the present invention, detailed description thereof is omitted.
  • Control-plane Control-plane
  • RRC Radio Resource Control
  • the following two radio resource request methods are prepared as methods for a terminal device to start transmission of data related to an uplink to a base station device.
  • the terminal apparatus when the base station apparatus assigns a configuration (configuration) related to transmission resources of a physical uplink control channel necessary for making a radio resource request to the terminal apparatus, the terminal apparatus Is a method of making a radio resource request (requesting transmission of an uplink grant) to a base station apparatus using a physical uplink control channel.
  • the terminal apparatus has a physical uplink shared channel (uplink grant) for transmitting data related to the uplink when data related to the uplink is retained in the uplink buffer.
  • uplink grant for transmitting data related to the uplink when data related to the uplink is retained in the uplink buffer.
  • a physical resource is requested by transmitting a physical uplink control channel (hereinafter referred to as SR-PUCCH) used for a radio resource request to the base station apparatus.
  • SR-PUCCH physical uplink control channel
  • the transmission counter of the physical uplink control channel is incremented and the time measurement of the radio resource request prohibition timer (SR Prohibit Timer) is started according to the setting.
  • the terminal device does not transmit SR-PUCCH when the radio resource request prohibition timer is counting.
  • the terminal device periodically transmits SR-PUCCH until a physical uplink shared channel (uplink grant) is allocated. However, if the uplink grant cannot be received from the base station apparatus even when the maximum number of SR-PUCCH transmissions is reached, the physical uplink control channel resource is released and the second radio resource request method is started. In the first radio resource request method, the terminal device is in a transmission timing adjustment state.
  • uplink grant a physical uplink shared channel
  • Radio resources for transmitting SR-PUCCH are allocated from the base station apparatus.
  • the terminal device does not need to transmit the SR-PUCCH even if there is an opportunity to transmit the SR-PUCCH if radio resources are already allocated or data to be transmitted does not exist in the uplink data buffer.
  • the radio resources of the allocated physical uplink control channel are maintained as they are.
  • the second radio resource request method is as follows: (1) The terminal device is in the transmission timing adjustment state, but the base station device has not assigned an uplink shared channel necessary for making a radio resource request to the terminal device. Or (2) Implemented when the TA timer is not operating (transmission timing non-adjusted state). In the second radio resource request method, the terminal apparatus makes a radio resource request to the base station apparatus using a physical random access channel.
  • the channel state information CSI includes periodic channel state information (Periodic CSI) and aperiodic channel state information (Aperiodic CSI). Transmission of the aperiodic channel state information is dynamically triggered by the physical downlink control channel from the base station apparatus, and is transmitted using the physical downlink shared channel.
  • the periodic channel state information is a physical uplink allocated in advance to notify the periodic channel state information in a subframe determined based on a semi-static setting from the base station apparatus. It is transmitted using a control channel (hereinafter referred to as CSI-PUCCH).
  • the terminal apparatus determines (determines) the periodic channel state information based on the measurement result, and periodically transmits the periodic channel state information using the radio resources of the allocated physical uplink control channel.
  • the present embodiment shows a method for efficiently controlling periodic uplink transmission when the terminal device 1 is communicating.
  • FIG. 1 is a block diagram showing an example of a terminal device 1 according to the first embodiment of the present invention.
  • the terminal device 1 includes a reception unit 101, a demodulation unit 102, a decoding unit 103, a measurement processing unit 104, a control unit 105, a transmission processing unit 106, a coding unit 107, a modulation unit 108, a transmission unit 109, and an upper layer unit 110.
  • the upper layer unit 110 includes a part of functions of an RRC (Radio Resource Control) layer that performs radio resource control.
  • the upper layer unit 110 and the transmission processing unit 106 include some functions of a MAC (Medium Access Control) layer that manages the data link layer.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • the terminal device 1 includes a reception system block (receiving unit 101, demodulating unit 102, decoding unit 103) and a plurality of receiving systems in order to support simultaneous reception of a plurality of frequencies (frequency bands, frequency bandwidths) by carrier aggregation.
  • a plurality of transmission system blocks (encoding unit 107, modulation unit 108, transmission unit 109) for supporting simultaneous transmission of the same frequency (frequency band, frequency bandwidth) may be provided.
  • terminal device control information is input from the upper layer unit 110 to the control unit 105.
  • the terminal device control information is information necessary for wireless communication control of the terminal device 1 configured by the reception control information and the transmission control information.
  • the wireless connection resource setting and the cell-specific notification individually transmitted from the base station device 2 It is set by information or system parameters, and the upper layer unit 110 inputs to the control unit 105 as necessary.
  • the control unit 105 appropriately inputs reception control information, which is control information related to reception, to the reception unit 101, the demodulation unit 102, and the decoding unit 103.
  • the reception control information includes information such as reception timing, multiplexing method, and radio resource arrangement information regarding each channel in addition to information on the reception frequency band.
  • control unit 105 inputs measurement setting information used for measurement event determination as to whether or not the measurement result of the terminal device 1 satisfies the designated measurement event to the measurement processing unit 104.
  • the measurement setting information can include a plurality of different types of measurement events.
  • a different measurement event may be set from the base station apparatus 2 for each cell or for each frequency.
  • the received signal is received by the receiving unit 101.
  • the receiving unit 101 receives a signal in the frequency band specified by the reception control information.
  • the receiving unit 101 can also be configured to simultaneously receive a plurality of frequency bands.
  • the received signal is input to the demodulation unit 102.
  • Demodulation section 102 demodulates the received signal, inputs the signal to decoding section 103 to correctly decode downlink data and downlink control data, and inputs each decoded data to upper layer section 110. .
  • Each data is also input to the measurement processing unit 104.
  • the decoding unit 103 inputs the received MAC control element to the upper layer unit 110.
  • the measurement processing unit 104 measures a measurement value of downlink reference signal reception quality (SIR, SINR, RSRP, RSRQ, RSSI, path loss, etc.) for each cell (component carrier), a physical downlink control channel, or a physical downlink shared channel.
  • the measurement result information is generated based on the measurement result of the reception error rate.
  • the measurement processing unit 104 also uses the measurement result as one of parameters for determining success or failure of the set measurement event.
  • the measurement processing unit 104 inputs the measurement result to the upper layer unit 110 as measurement result information.
  • the measurement processing unit 104 displays a measurement event result indicating the content of the established measurement event as a measurement result.
  • Information is sent to the upper layer unit 110 as information.
  • the measurement processing unit 104 displays the measurement event result indicating the content of the measurement event that is not satisfied when the measurement event once satisfied is not satisfied (that is, when the set measurement event condition is not satisfied). You may notify to the upper layer part 110 as measurement result information.
  • the measurement processing unit 104 further generates ACK / NACK (HARQ information) from the received physical downlink shared channel as necessary. Further, the measurement processing unit 104 generates CSI from the reception quality. Then, the measurement processing unit 104 outputs these (HARQ information and CSI) to the transmission processing unit 106 as the uplink control information UCI.
  • ACK / NACK HARQ information
  • CSI uplink control information
  • terminal device control information that is a control parameter for controlling each block is input from the upper layer unit 110 to the control unit 105, and transmission control information that is control information regarding transmission is transmitted to the transmission processing unit 106, code Are appropriately input to the unit 107, the modulation unit 108, and the transmission unit 109.
  • the transmission control information includes information such as encoding information, modulation information, transmission frequency band information, transmission timing for each channel, multiplexing method, and radio resource arrangement information as uplink scheduling information of the transmission signal.
  • the transmission processing unit 106 receives setting information (random access setting information) related to a random access procedure as transmission control information.
  • the random access setting information includes preamble information, radio resource information for transmission of a physical random access channel (power adjustment parameter, maximum preamble retransmission count, etc.), and the like.
  • the upper layer section 110 manages transmission timing adjustment information and a transmission timing timer used for adjustment of uplink transmission timing, and states of uplink transmission timing (transmission timing) for each cell (or for each cell group and each TA group). (Adjustment state or transmission timing non-adjustment state).
  • the transmission timing adjustment information and the transmission timing timer are included in the transmission control information.
  • the upper layer section 110 transmits transmission timing adjustment information corresponding to the uplink transmission timing of each of a plurality of cells (or cell groups, TA groups). to manage.
  • uplink signal control information is set by the higher layer unit 110.
  • Information related to transmission of an uplink reference signal (demodulation reference signal setting, periodic sounding reference signal setting, aperiodic sounding reference signal setting) is set in the uplink signal control information.
  • the transmission processing unit 106 further manages the uplink buffer, and when transmission data (uplink data and uplink control data) is input from the upper layer unit 110 at an arbitrary timing, the transmission processing unit 106 The amount (uplink buffer amount) is calculated. That is, transmission processing section 106 manages the generation timing of SR-PUCCH.
  • the transmission processing unit 106 performs transmission control of an uplink signal (physical signal) and / or an uplink physical channel based on the content indicated by the L2 message (MAC control element) from the upper layer unit 110. Further, the transmission processing unit 106 outputs data on the uplink physical signal and / or the uplink physical channel to the coding unit 107 based on the information on the uplink physical signal and / or the uplink physical channel.
  • the encoding unit 107 appropriately encodes each data according to the transmission control information and outputs the data to the modulation unit 108.
  • the modulation unit 108 appropriately performs modulation processing based on the channel structure for transmitting the output from the coding unit 107.
  • the transmission unit 109 maps the output of the modulation unit 108 to the frequency domain, converts the frequency domain signal into a time domain signal, and performs power amplification on a carrier wave of a predetermined frequency.
  • the transmission unit 109 also adjusts the uplink transmission timing according to the transmission timing adjustment information for each cell (and for each cell group and each TA group) input from the higher layer unit 110.
  • the physical uplink shared channel in which the uplink control data is arranged can include, for example, a layer 3 message (radio resource control message; RRC message) in addition to the user data.
  • RRC message radio resource control message
  • FIG. 1 other components of the terminal device 1 are omitted because they are not particularly strongly related to the present embodiment, but a plurality of blocks having other functions necessary for operating as the terminal device 1 are configured. Obviously it has as an element.
  • FIG. 2 is a block diagram showing an example of the base station apparatus 2 according to the first embodiment of the present invention.
  • the base station apparatus includes a reception unit 201, a demodulation unit 202, a decoding unit 203, a control unit 204, a coding unit 205, a modulation unit 206, a transmission unit 207, an upper layer unit 208, and a network signal transmission / reception unit 209.
  • the base station apparatus 2 includes a reception system block (reception unit 201, demodulation unit 202, decoding unit 203) and a transmission system block (encoding unit) in order to support a plurality of frequencies (frequency bands and frequency bandwidths).
  • 205, a modulation unit 206, and a transmission unit 207) may be provided.
  • the higher layer unit 208 inputs the downlink data and the downlink control data to the encoding unit 205.
  • the encoding unit 205 encodes the input data and inputs it to the modulation unit 206.
  • Modulation section 206 modulates the encoded signal.
  • the signal output from the modulation unit 206 is input to the transmission unit 207.
  • Transmitter 207 maps the input signal to the frequency domain, then converts the frequency domain signal to a time domain signal, transmits the amplified signal on a carrier having a predetermined frequency, and transmits the signal.
  • the physical downlink shared channel in which downlink control data is arranged typically constitutes a layer 3 message (RRC message).
  • the receiving unit 201 converts the signal received from the terminal device 1 into a baseband digital signal.
  • the receiving unit 201 receives signals at different timings for each cell (also for each cell group and each TA group).
  • the digital signal converted by the reception unit 201 is input to the demodulation unit 202 and demodulated.
  • the signal demodulated by the demodulation unit 202 is then input to the decoding unit 203 and decoded, and the correctly decoded uplink control data and uplink data are output to the upper layer unit 208.
  • Base station apparatus control information necessary for control of each block is information necessary for radio communication control of the base station apparatus 2 configured by reception control information and transmission control information, and a higher-level network apparatus (MME or gateway apparatus). , OAM) and system parameters, and the upper layer unit 208 inputs to the control unit 204 as necessary.
  • MME higher-level network apparatus
  • the control unit 204 transmits base station apparatus control information related to transmission to each block of the encoding unit 205, modulation unit 206, and transmission unit 207 as transmission control information, and base station apparatus control information related to reception to the reception control information.
  • base station apparatus control information related to transmission to each block of the encoding unit 205, modulation unit 206, and transmission unit 207 as transmission control information, and base station apparatus control information related to reception to the reception control information.
  • the RRC of the base station device 2 exists as a part of the higher layer unit 208.
  • the network signal transmitting / receiving unit 209 transmits (transfers) or receives control messages or user data between the base station devices 2 or between the host network device and the base station device 2.
  • the base station device 2 transmits (transfers) or receives control messages or user data between the base station devices 2 or between the host network device and the base station device 2.
  • other components of the base station device 2 are omitted because they are not particularly strongly related to the present embodiment, but a plurality of blocks having other functions necessary for operating as the base station device 2 are omitted. It is clear to have as a component.
  • FIG. 3 is a diagram illustrating an example of periodic uplink transmission of the primary cell between the conventional terminal device 1 and the base station device 2, and transmission / reception of the primary cell of the terminal device 1 over time. Shows control.
  • the horizontal axis in Fig. 3 shows the passage of time.
  • arrows in the figure indicate timings at which SRS, CSI-PUCCH, and SR-PUCCH are periodically transmitted from the terminal device 1.
  • Each SRS is transmitted at the timing of SRS1 to SRS4, and the transmission interval (cycle) indicates P1.
  • the CSI-PUCCH is transmitted at timings CSI1 to CSI6, respectively, and the transmission interval (cycle) indicates P2.
  • SR-PUCCH is transmitted at the timing of SR1 to SR3, respectively, and the transmission interval (cycle) indicates P3.
  • the timing at which these signals / channels are transmitted from the terminal device 1 is assigned from the base station device 2 in advance.
  • FIG. 3 is an example for explaining the present embodiment, and naturally there may be cases other than the case where the actual transmission timing is exemplified.
  • control is performed to stop transmission of user data transmission / reception (ie, physical uplink shared channel PUSCH).
  • the uplink reference signal ie, SRS
  • the report of downlink channel state information by the physical uplink control channel ie, CSI-PUCCH
  • the uplink radio resource request by the physical uplink control channel It is impossible to perform control for individually stopping transmission of each periodically allocated channel / signal such as SR-PUCCH.
  • the control command is preferably notified from the base station apparatus 2 to the terminal apparatus 1 using the L2 message (MAC control element), but may be notified using the L1 message (PDCCH).
  • L2 message MAC control element
  • SR-PUCCH is a channel transmitted as necessary, and is not transmitted when a radio resource request is not triggered. That is, when there is no transmission data in the terminal device 1, it is not necessary to stop transmission of SR-PUCCH, and it is only necessary to control only transmission of SRS and CSI-PUCCH. Therefore, the control command controls (1) periodic transmission of SRS and CSI-PUCCH, (2) controls periodic transmission of SRS, and (3) controls periodic transmission of CSI-PUCCH. It is desirable to configure so that the three patterns can be controlled.
  • FIG. 4 is an example of a control command (MAC control element) for controlling a periodic transmission signal / channel transmitted from the base station apparatus 2 to the terminal apparatus 1 in the first embodiment.
  • the control command is preferably formed in an 8-bit bitmap format.
  • the control command of FIG. 4 is divided into three fields, which are a reserved bit field, a channel designation field, and a group designation field, respectively.
  • 2 bits are assigned to the reserved bit field
  • 2 bits are assigned to the channel designation field
  • 4 bits are assigned to the group designation field.
  • the number of bits need not be limited. It can be changed freely.
  • the reserved bit field is a field that is not actually used, and the reserved bit R included in the field is fixed to “0 (zero)”.
  • the channel designation bit field is a field for designating a signal / field to be controlled, and is used for designating a channel to be controlled by a bit string of channel designation bits F included in the field. For example, if the channel designation bit F in the channel designation field is “00”, it indicates that the SRS is a control target, and if “01”, the CSI-PUCCH is a control target, and may be “10”. For example, it may be configured to indicate that SRS and CSI-PUCCH are control targets. Alternatively, one bit corresponding to each signal / channel may be assigned to indicate that a signal / channel whose corresponding bit is “1” is a control target.
  • the group designation bit field is a field for designating a cell group (TA group) to be controlled, and is used for designating a cell to be controlled by a bit string of group designation bits G0 to G3 included in the field.
  • the field is composed of 4 bits, 1 bit corresponding to each cell group (TA group) is allocated, and the signal / channel in the cell group in which the corresponding bit is “1” is controlled. It may be configured.
  • the group designation bit G0 is “1”
  • the periodic transmission of the signal / channel of the corresponding cell group may be stopped.
  • the bit when the bit is “0”, it may be configured to cancel the periodic transmission stop of the signal / channel of the cell group and resume the transmission.
  • the bit is “1”
  • the cell group signal / channel periodic transmission stop and transmission restart may be toggled.
  • the group designation bit G0 corresponds to the primary transmission timing group
  • the group designation bit G1 corresponds to the secondary transmission timing group 1
  • the group designation bit G2 corresponds to the secondary transmission timing group 2
  • the group designation bit G3 corresponds to the secondary transmission timing group 3.
  • bit string of the control command received from the base station apparatus 2 is “00101001”. That is, in the terminal device 1, the reserved bit R is “00”, the channel designation bit F is “10”, the group designation bit G3 is “1”, the group designation bit G2 is “0”, and the group designation bit G1 is “0”. , It is determined that the group designation bit G0 is set to “1”. At this time, the terminal device 1 performs control so that transmission of SRS and CSI-PUCCH is stopped in the uplinks of all cells included in the primary transmission timing group and the secondary transmission timing group 3.
  • the terminal device 1 and the base station device 2 can efficiently control uplink transmission for each group and each signal / channel.
  • the reserved bit R in the reserved bit field is used to stop or expire the transmission timing timer of the transmission timing group corresponding to the bit set in the group designation bit and the bit set in the group designation bit.
  • a control command for stopping or resuming transmission of periodic signals / channels of a corresponding transmission timing group may be switched. That is, the terminal device 1 may be configured so that the interpretation of the control content indicated by the control command can be changed according to a specific bit in the received control command.
  • the terminal device 1 determines whether the control content indicated by the control command is the first control content or the second control content according to a specific bit in the received control command.
  • the first control content is a method for controlling transmission while maintaining related radio resources
  • the second control content is interpreted as a method for controlling transmission by releasing related radio resources. May be configured. With this configuration, the terminal device 1 and the base station device 2 can more flexibly control uplink transmission for each group.
  • control command in FIG. 4 can be further simplified. For example, if the signals / channels subject to transmission control are always only SRS and CSI-PUCCH, the channel designation bit field can be reduced. Further, for example, if only the primary transmission timing group is controlled, the group designation bit field can be reduced.
  • FIG. 5 shows an example of a control command in which the channel designation bit field and the group designation bit field are reduced and only the transmission control bit C is included.
  • the base station apparatus 2 wants to control (stop, restart) transmission of the SRS and CSI-PUCCH of the primary transmission timing group (primary cell), it designates “1” or “0” in the transmission control bit C and the terminal apparatus You may comprise so that it may transmit to 1.
  • the transmission control bit C is “1”
  • the terminal device 1 may be configured to stop periodic transmission of the SRS and CSI-PUCCH of the primary transmission timing group (primary cell). Also, for example, when the transmission control bit C is “0”, the periodic transmission stop of the SRS and CSI-PUCCH of the primary transmission timing group (primary cell) is canceled and transmission is resumed. Also good.
  • the transmission control bit C is “1”, it may be configured to toggle the periodic transmission stop and transmission restart of the SRS and CSI-PUCCH of the primary transmission timing group (primary cell). Good.
  • the terminal device 1 and the base station device 2 need only perform uplink transmission control of the primary transmission timing group, so that control can be simplified.
  • FIG. 6 is a diagram illustrating a method for controlling the periodic transmission of SRS and CSI-PUCCH between the terminal apparatus 1 and the base station apparatus 2 according to the first embodiment.
  • the meanings of the symbols shown in FIG. 6 are the same as those in FIG.
  • the terminal device 1 receives the control command C1 from the base station device 2.
  • the control command C1 has contents indicating that transmission of SRS and CSI-PUCCH is stopped.
  • the terminal apparatus 1 has SRS transmission opportunities (SRS1 to SRS4 in FIG. 3) after the subframe number n + m after the elapse of m subframes from the subframe number n, which is the timing at which the control command C1 is received. Even if there is a transmission opportunity of CSI-PUCCH (CSI1 to CSI6 in FIG. 3), control is performed to suppress transmission of SRS and CSI-PUCCH.
  • SR-PUCCH (SR1 to SR3) is transmitted is shown, but the terminal device 1 does not need to transmit SR-PUCCH if it is not necessary to make a radio resource request.
  • the base station apparatus 2 can reduce the power consumption of the terminal apparatus 1 and can immediately respond to the radio resource request by permitting only the SR transmission.
  • FIG. 7 is a diagram illustrating a method for controlling the periodic transmission of SRS between the terminal device 1 and the base station device 2 in the first embodiment.
  • the meanings of the symbols shown in FIG. 7 are the same as those in FIG.
  • the terminal device 1 receives the control command C2 from the base station device 2.
  • the control command C2 has contents indicating that SRS transmission is stopped.
  • the terminal apparatus 1 has SRS transmission opportunities (SRS1 to SRS4 in FIG. 3) after the subframe number n + m after the m subframe has elapsed from the subframe number n, which is the timing at which the control command C2 is received. Even if there is, control is performed so as to suppress transmission of SRS.
  • transmission of SR-PUCCH is continued if necessary. In the figure, an example in which SR-PUCCH (SR1 to SR3) is transmitted is shown, but the terminal device 1 does not need to transmit SR-PUCCH if it is not necessary to make a radio resource request.
  • the base station apparatus 2 transmits CSI-PUCCH in addition to SR, thereby reducing the power consumption of the terminal apparatus 1 and knowing a sudden change in the downlink quality status.
  • FIG. 8 is a diagram illustrating a method of controlling the periodic transmission of CSI-PUCCH between the terminal device 1 and the base station device 2 in the first embodiment.
  • the meanings of the symbols shown in FIG. 8 are the same as those in FIG.
  • the terminal device 1 receives the control command C3 from the base station device 2.
  • the control command C3 has contents indicating that CSI-PUCCH transmission is stopped.
  • the terminal apparatus 1 transmits the CSI-PUCCH transmission opportunities (CSI1 to CSI1 in FIG. 3) after the subframe number n + m after the elapse of m subframes from the subframe number n, which is the timing at which the control command C3 is received. Even if there is CSI 6), control is performed so as to suppress transmission of CSI-PUCCH.
  • SR-PUCCH (SR1 to SR3) is transmitted is shown, but the terminal device 1 does not need to transmit SR-PUCCH if it is not necessary to make a radio resource request.
  • SRS SRS
  • the base station apparatus 2 can reduce power consumption of the terminal apparatus 1 and maintain uplink transmission timing.
  • 6 to 8 show an example of periodic uplink transmission in the primary transmission timing group (primary cell), but the same control can be applied to the secondary transmission timing group (secondary cell). Note that the SR-PUCCH and CSI-PUCCH are not transmitted in the secondary cell, and only the SRS can be controlled.
  • the terminal device 1 receives the downlink grant or the uplink grant for the cell (cell group) for which the periodic uplink other than the SR is stopped, and the uplink that is the target of the transmission stop The transmission of other signals / channels may be resumed.
  • the terminal apparatus 1 triggers transmission of SR in a cell (cell group) that has stopped periodic uplink other than SR, or actually transmits SR, Transmission of an uplink signal / channel may be resumed.
  • the trigger for the base station device 2 to transmit a control command to the terminal device 1 may be determined by the base station device 2 depending on the implementation of the base station device 2, or may be determined in advance by the terminal device.
  • the base station apparatus 2 may make a determination based on the notification received from 1.
  • the terminal device 1 is expected to not require periodic transmission from the terminal device 1 or to generate no uplink transmission data for a certain period of time.
  • Information regarding periodic uplink transmission may be transmitted to the base station apparatus 2.
  • the periodic uplink information is preferably transmitted using an RRC message, but may be transmitted using an L2 message or an L1 message.
  • the terminal device 1 may transmit the periodic uplink information to the base station device 2 when the periodic transmission is stopped based on the control command from the base station device 2. In this case, the periodic uplink information is regarded as information indicating that the periodic transmission stop has been completed.
  • Whether the terminal device 1 transmits periodic uplink information is based on the setting from the base station device 2. That is, when the base station apparatus 2 permits transmission of periodic uplink information from the terminal apparatus 1, a setting clearly indicating that the periodic uplink information is supported is set in the terminal apparatus 1 in the radio resource control setting. against. In addition, the terminal device 1 notifies the base station device 2 of whether or not transmission of periodic uplink information is supported by a terminal device capability information message (UE Capability).
  • UE Capability terminal device capability information message
  • the terminal device 1 is individually and dynamically controlled with respect to the periodic uplink transmission allocated from the base station device 2. Also, the terminal device 1 can control periodic uplink transmission for each cell group and each signal / channel based on the control command received from the base station device 2.
  • the base station apparatus 2 of the present embodiment can individually and dynamically control the periodic uplink transmission allocated to the terminal apparatus 1. Further, the base station apparatus 2 can control periodic uplink transmission for each cell group and for each signal / channel by transmitting a control command to the terminal apparatus 1.
  • the terminal device 1 and the base station device 2 maintain the radio resources of the physical uplink control channel used for the radio resource request, and the physical uplink control for notifying the sounding reference signal and the periodic channel state information. Transmission of either or both of the channels can be controlled. For this reason, it is possible to reduce the power consumption of the terminal device 1 without increasing the transmission delay required when the uplink transmission is resumed.
  • the control command is configured on the assumption that periodic transmission is temporarily stopped. However, when transmission / reception does not occur for a certain period of time, it may be better to release (release) radio resources related to periodic uplink transmission from the viewpoint of radio resource utilization efficiency.
  • periodic uplink transmission is controlled, and an uplink signal (physical signal) and / or uplink physical channel corresponding to when transmission / reception does not occur for a certain period of time or more are used.
  • An uplink transmission control method for releasing radio resources will be described.
  • the configurations of the terminal device 1 and the base station device 2 used in this embodiment may be the same as those shown in FIGS.
  • One method of releasing radio resources is when the terminal device 1 that has received a control command related to periodic uplink transmission from the base station device 2 starts measuring a timer (release timer) and the release timer expires. To automatically release related radio resources.
  • the release timer may be set in advance from the base station apparatus 2 to the terminal apparatus 1 using an RRC message, or may be included in the control command.
  • a plurality of release timers may be prepared for each cell (cell group), or one release timer may be prepared for the entire cell set in the terminal device 1.
  • FIG. 9 and 10 show examples of control commands when a release timer is included.
  • FIG. 9 is obtained by replacing the reserved bit field in FIG. 4 with a timer bit field.
  • FIG. 10 is obtained by replacing a part of the reserved bit field in FIG. 5 with a timer bit field.
  • the control command including the release timer is not limited to the exemplified bitmap format.
  • the timer bit field is a field for designating a release timer which is timed after receiving the control command or after the control command is actually valid, and the timer value is determined by the bit string of the timer bit T included in the field. Is set. For example, if the timer bit T is “00”, it indicates that the release timer value is 40 ms, if the timer bit T is “01”, it indicates that the release timer value is 80 ms, and the timer bit T is “10”. "Indicates that the release timer value is 160 ms, and if the timer bit T is" 11 ", the release timer may be stopped.
  • the actual release timer value is not limited to this value, and a value set in the system may be used, or a value corresponding to each bit string may be set in advance from the base station apparatus 2 to the terminal apparatus 1 in the RRC message.
  • the RRC message may be a separately transmitted message or a system information message that notifies broadcast information.
  • FIG. 11 is a diagram showing a method for controlling the periodic transmission of SRS and CSI-PUCCH when a release timer is designated.
  • the meanings of the symbols shown in FIG. 11 are the same as those in FIG.
  • the terminal device 1 receives the control command C4 from the base station device 2.
  • the control command C4 has contents indicating that transmission of SRS and CSI-PUCCH is stopped.
  • a release timer T1 indicating a time for stopping transmission of SRS and CSI-PUCCH is set in the control command C4.
  • the terminal apparatus 1 has an SRS transmission opportunity until the release timer T1 elapses after the subframe number n + m after the m subframe has elapsed from the subframe number n, which is the timing at which the control command C4 is received.
  • SRS1 to SRS4 in FIG. 3 and CSI-PUCCH transmission opportunities are controlled to suppress transmission of SRS and CSI-PUCCH.
  • transmission of SR-PUCCH is continued if necessary.
  • an example in which SR-PUCCH (SR1 to SR2) is transmitted is shown, but the terminal device 1 does not need to transmit SR-PUCCH if it is not necessary to make a radio resource request.
  • the terminal device 1 releases (releases) radio resources of SRS, CSI-PUCCH, and SR-PUCCH.
  • the terminal device 1 may realize the release of radio resources by applying default setting values. That is, in the cell (cell group) for which the release timer T1 has expired, the subsequent transmission is not performed from the terminal device 1. In order for the terminal device 1 to transmit again in the corresponding cell (cell group), it is necessary to start a random access procedure.
  • the base station apparatus 2 can reduce the power consumption of the terminal apparatus 1 and the signaling necessary for releasing radio resources by setting a release timer.
  • the terminal device 1 when the terminal device 1 is measuring the release timer in a cell (cell group) in which periodic uplink other than SR is stopped, the downlink grant for the cell (cell group) is targeted. Alternatively, the release timer corresponding to the reception of the uplink grant may be stopped. Alternatively, when the terminal device 1 is counting the release timer in a cell (cell group) that stops periodic uplink other than SR, when the SR transmission is triggered or actually SR The corresponding release timer may be stopped when transmitting.
  • FIG. 11 shows an example of periodic uplink transmission in the primary transmission timing group (primary cell), but the same control can be applied to the secondary transmission timing group (secondary cell). Note that the SR-PUCCH and CSI-PUCCH are not transmitted in the secondary cell, and only the SRS can be controlled.
  • the terminal device 1 can manage radio resources more efficiently by setting a timer for releasing radio resources from the base station apparatus 2.
  • the base station device 2 of the present embodiment can more efficiently manage radio resources by setting a timer for releasing radio resources to the terminal device 1. it can.
  • the terminal device 1 and the base station device 2 maintain the radio resources of the physical uplink control channel used for the radio resource request, and the physical uplink control for notifying the sounding reference signal and the periodic channel state information. Transmission of either or both of the channels can be controlled efficiently. For this reason, it is possible to reduce the power consumption of the terminal device 1 without increasing the transmission delay required when the uplink transmission is resumed. Moreover, the terminal device 1 and the base station apparatus 2 can release
  • the control command is configured on the assumption that periodic transmission is temporarily stopped. However, if the base station apparatus 2 can predict the timing at which the next transmission occurs to some extent, it is more efficient to resume transmission autonomously without transmitting a new control command.
  • uplink transmission control that controls periodic uplink transmission and autonomously controls periodic uplink transmission according to the timing of the next predicted transmission opportunity.
  • the method is shown.
  • the configurations of the terminal device 1 and the base station device 2 used in this embodiment may be the same as those shown in FIGS.
  • One method for autonomously controlling periodic uplink transmission is that the terminal device 1 that has received a control command related to periodic uplink transmission from the base station device 2 starts counting a timer (effective timer).
  • a timer effective timer
  • the valid timer expires, it is determined that the content of the control command is invalid. That is, the valid timer indicates the valid time of the control content specified by the control command.
  • the valid timer may be set in advance from the base station apparatus 2 to the terminal apparatus 1 using an RRC message, or may be included in the control command.
  • a plurality of effective timers may be prepared for each cell (cell group), or one effective timer may be prepared for the entire cell set in the terminal device 1.
  • the control command including the valid timer may be the same as the bitmap format shown in FIG. 9 or FIG.
  • the timer bit field is a field for designating a valid timer that is timed after receiving the control command or after the control command is actually valid, and depends on the bit string of the timer bit T included in the field.
  • a timer value is set. For example, if the timer bit T is “00”, it indicates that the effective timer value is 40 ms, if the timer bit T is “01”, it indicates that the effective timer value is 80 ms, and the timer bit T is “10”. ”Indicates that the effective timer value is 160 ms, and if the timer bit T is“ 11 ”, the effective timer may be stopped.
  • the actual valid timer value is not limited to this value, and a value set in the system may be used, or a value corresponding to each bit string may be set in advance from the base station apparatus 2 to the terminal apparatus 1 in the RRC message.
  • the RRC message may be a separately transmitted message or a system information message that notifies broadcast information.
  • FIG. 12 is a diagram showing a method for controlling the periodic transmission of SRS and CSI-PUCCH when a valid timer is designated.
  • the meanings of the symbols shown in FIG. 12 are the same as those in FIG.
  • the terminal device 1 receives the control command C5 from the base station device 2.
  • the control command C5 has contents indicating that transmission of SRS and CSI-PUCCH is stopped.
  • a valid timer T2 indicating a valid time for stopping transmission of SRS and CSI-PUCCH is set in the control command C5.
  • the terminal apparatus 1 has an SRS transmission opportunity until the valid timer T2 elapses from the subframe number n + m after the elapse of the m subframe from the subframe number n, which is the timing at which the control command C5 is received.
  • SRS1 to SRS3 in FIG. 3 and CSI-PUCCH transmission opportunities are controlled to suppress transmission of SRS and CSI-PUCCH.
  • transmission of SR-PUCCH is continued if necessary.
  • an example in which SR-PUCCH (SR1 to SR2) is transmitted is shown, but the terminal device 1 does not need to transmit SR-PUCCH if it is not necessary to make a radio resource request.
  • the terminal device 1 determines that the corresponding control command has become invalid when the valid timer T2 expires, and resumes the periodic transmission of the SRS and CSI-PUCCH that have been suspended. That is, in the cell (cell group) for which the valid timer T2 has expired, the subsequent periodic uplink transmission (CSI5 to CSI6, SRS4, SR3 in FIG. 12) is resumed.
  • the base station apparatus 2 can reduce the power consumption of the terminal apparatus 1 by setting an effective timer, and can control the resumption of periodic uplink transmission as necessary.
  • the terminal device 1 when the terminal device 1 is measuring a valid timer in a cell (cell group) that stops periodic uplink other than SR, the downlink grant for the cell (cell group) is targeted. Alternatively, the corresponding valid timer may be stopped when the uplink grant is received. Alternatively, when the terminal device 1 is counting the effective timer in a cell (cell group) that stops periodic uplink other than SR, when the SR transmission is triggered or actually SR The corresponding valid timer may be stopped when transmitting.
  • FIG. 12 shows an example of periodic uplink transmission in the primary transmission timing group (primary cell), but the same control can be applied to the secondary transmission timing group (secondary cell). Note that the SR-PUCCH and CSI-PUCCH are not transmitted in the secondary cell, and only the SRS can be controlled.
  • the terminal device 1 of the present embodiment can more efficiently manage radio resources by setting a timer indicating the effective time of the control command from the base station device 2. .
  • the base station apparatus 2 of the present embodiment is configured to more efficiently manage radio resources by setting a timer indicating the valid time of the control command for the terminal apparatus 1. It can be carried out.
  • the terminal device 1 and the base station device 2 maintain the radio resources of the physical uplink control channel used for the radio resource request, and the physical uplink control for notifying the sounding reference signal and the periodic channel state information. Transmission of either or both of the channels can be controlled efficiently. For this reason, it is possible to reduce the power consumption of the terminal device 1 without increasing the transmission delay required when the uplink transmission is resumed. Also, the terminal device 1 and the base station device 2 can quickly control the resumption of uplink transmission according to the predicted timing of the next transmission opportunity.
  • the uplink transmission scheme or the downlink transmission scheme can be applied to both the FDD (frequency division duplex) scheme and the TDD (time division duplex) communication system.
  • the present invention can also be applied to communication systems having different uplink transmission schemes and downlink transmission schemes.
  • path loss or other measurement values SIR, SINR, RSRP, RSRQ, RSSI, BLER
  • SIR, SINR, RSRP, RSRQ, RSSI, BLER path loss or other measurement values
  • the names of the parameters shown in the embodiment are called for convenience of explanation, and even if the parameter name actually applied and the parameter name of the present embodiment are different, the embodiment of the present application is used. It does not affect the gist of the invention claimed in.
  • the terminal device 1 is also referred to as a mobile station device.
  • the mobile station device is not limited to a moving terminal, and the function of the mobile station device may be mounted on a fixed terminal.
  • the terminal device 1 is further referred to as a user terminal, a communication terminal, a mobile device, a mobile station, a UE (User Equipment), and an MS (Mobile Station).
  • the base station apparatus 2 is also referred to as a radio base station apparatus, a base station, a radio base station, a fixed station, an NB (Node-B), an eNB (evolved Node-B), a BTS (Base Transceiver Station), and a BS (Base Station). Is done.
  • the terminal device 1 is described as an example of the communication device.
  • the present invention is not limited to this, and the stationary or non-movable electronic device installed indoors or outdoors, for example, Needless to say, the present invention can be applied to terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other daily life equipment.
  • terminal device 1 and the base station device 2 of the embodiment have been described using functional block diagrams, but the functions of the respective units of the terminal device 1 and the base station device 2 or some of these functions or The steps of the method or algorithm for realizing the other series of functions can be directly embodied by hardware, a software module executed by the processor, or a combination of the two. If implemented by software, the functions may be maintained or transmitted as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes both communication media and computer recording media including media that facilitate carrying a computer program from one place to another.
  • One or more instructions or codes are recorded on a computer-readable recording medium, and one or more instructions or codes recorded on the recording medium are read into a computer system and executed, thereby executing the terminal device 1 or the base.
  • the station device 2 may be controlled.
  • the “computer system” includes an OS and hardware such as peripheral devices.
  • a program that operates in the terminal device 1 and the base station device 2 according to each embodiment of the present invention is a program that controls a CPU or the like (a computer is installed) so as to realize the functions of the above-described embodiments according to each embodiment of the present invention.
  • Program to function Information handled by these devices is temporarily stored in the RAM at the time of processing, then stored in various ROMs and HDDs, read out by the CPU, and corrected and written as necessary.
  • By executing the program not only the functions of the above-described embodiment are realized, but also by processing in cooperation with an operating system or other application programs based on the instructions of the program, The functions of the embodiments may be realized.
  • the “computer-readable recording medium” refers to a semiconductor medium (eg, RAM, nonvolatile memory card, etc.), an optical recording medium (eg, DVD, MO, MD, CD, BD, etc.), a magnetic recording medium (eg, , A magnetic tape, a flexible disk, etc.) and a storage device such as a disk unit built in a computer system.
  • the “computer-readable recording medium” means that a program is dynamically held for a short time, like a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In this case, it is intended to include those that hold a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client in that case.
  • the program may be for realizing a part of the above-described functions, and further, may be realized by combining the above-described functions with a program already recorded in a computer system. good.
  • each functional block (unit) or feature of the terminal device 1 and the base station device 2 used in each of the above embodiments is designed to execute the function described in this specification or other series of functions.
  • General purpose processor digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array signal (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or It can be implemented or implemented by a combination of these.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array signal
  • a general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • the processor may also be implemented as a combination of computing devices. For example, a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors connected to a DSP core, or a combination of other such configurations.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/JP2013/074038 2012-09-27 2013-09-06 Dispositif terminal, dispositif station de base, système de communication, procédé de commande de transmission en liaison montante et circuit intégré Ceased WO2014050492A1 (fr)

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JP2012-213955 2012-09-27

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CN109076610A (zh) * 2016-05-06 2018-12-21 株式会社Ntt都科摩 用户终端及无线通信方法
CN112753247A (zh) * 2018-09-27 2021-05-04 三星电子株式会社 进行无线通信系统中的双连接的装置和方法
US11191044B2 (en) 2014-08-05 2021-11-30 Qualcomm Incorporated Timing alignment procedures for dual PUCCH
CN114009085A (zh) * 2019-06-26 2022-02-01 株式会社Ntt都科摩 终端
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WO2025037431A1 (fr) * 2023-08-12 2025-02-20 Sharp Kabushiki Kaisha Équipements utilisateurs et procédés

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11191044B2 (en) 2014-08-05 2021-11-30 Qualcomm Incorporated Timing alignment procedures for dual PUCCH
WO2016119652A1 (fr) * 2015-01-30 2016-08-04 中兴通讯股份有限公司 Procédé et dispositif de rapport de csi par un ue et déclenchement de l'ue afin de rapporter des csi
CN114531218A (zh) * 2015-08-06 2022-05-24 夏普株式会社 终端装置、基站装置以及通信方法
CN109076610A (zh) * 2016-05-06 2018-12-21 株式会社Ntt都科摩 用户终端及无线通信方法
JPWO2017191840A1 (ja) * 2016-05-06 2019-03-07 株式会社Ｎｔｔドコモ ユーザ端末及び無線通信方法
JP7272791B2 (ja) 2016-05-06 2023-05-12 株式会社Ｎｔｔドコモ 端末、無線通信方法及びシステム
CN112753247A (zh) * 2018-09-27 2021-05-04 三星电子株式会社 进行无线通信系统中的双连接的装置和方法
CN114009085A (zh) * 2019-06-26 2022-02-01 株式会社Ntt都科摩 终端
CN114009085B (zh) * 2019-06-26 2023-12-08 株式会社Ntt都科摩 终端
WO2025037431A1 (fr) * 2023-08-12 2025-02-20 Sharp Kabushiki Kaisha Équipements utilisateurs et procédés
US12531615B2 (en) 2023-08-12 2026-01-20 Sharp Kabushiki Kaisha Channel state information processing in communication networks

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