WO2013168697A1 - Appareil de station mobile, appareil de station de base, système de communication, procédé de requête de ressources radio et circuit intégré - Google Patents

Appareil de station mobile, appareil de station de base, système de communication, procédé de requête de ressources radio et circuit intégré Download PDF

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Publication number
WO2013168697A1
WO2013168697A1 PCT/JP2013/062829 JP2013062829W WO2013168697A1 WO 2013168697 A1 WO2013168697 A1 WO 2013168697A1 JP 2013062829 W JP2013062829 W JP 2013062829W WO 2013168697 A1 WO2013168697 A1 WO 2013168697A1
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Prior art keywords
radio resource
station apparatus
mobile station
resource request
base station
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PCT/JP2013/062829
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English (en)
Japanese (ja)
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恭之 加藤
克成 上村
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シャープ株式会社
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Publication of WO2013168697A1 publication Critical patent/WO2013168697A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • 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 mobile station device, a base station device, and a mobile station device that efficiently reduce a power consumption and use efficiency of a radio resource by efficiently performing a radio resource request between the mobile station device and the base station device.
  • the present invention relates to a communication system, a radio resource request method, and an integrated circuit.
  • 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
  • a mobile station apparatus in EUTRA includes a radio resource request (also referred to as scheduling request (SR)) procedure for requesting uplink radio resources.
  • SR scheduling request
  • the mobile station apparatus has a physical uplink control channel and a physical random access channel as uplink channels used for the radio resource request, uplink radio resources are required for the base station apparatus.
  • the mobile station apparatus notifies the base station apparatus that uplink radio resources are necessary by transmitting either of these channels.
  • Non-Patent Document 1 an application that generates only a small amount of data packets (for example, background communication (background traffic), instant message communication, or the like) always operates in the mobile station apparatus.
  • the radio resource for uplink data that is actually used is small and the frequency of transmission is low. Therefore, the physical uplink control channel used for the radio resource request is assigned to the mobile station apparatus.
  • utilization efficiency of radio resources related to the physical uplink control channel deteriorates.
  • the simplest way to solve this problem is to reduce the frequency of allocating physical uplink control channels used for radio resource requests.
  • reducing the allocation frequency of the physical uplink control channel used for the radio resource request means that the mobile station apparatus always monitors the physical downlink control channel until the radio resource is allocated, which increases power consumption. There is a problem of doing.
  • an object of an embodiment of the present invention is to reduce power consumption and improve the use efficiency of radio resources by efficiently making radio resource requests between a mobile station apparatus and a base station apparatus.
  • An object of the present invention is to provide a mobile station device, a base station device, a communication system, a radio resource request method, and an integrated circuit.
  • the mobile station apparatus in the embodiment of the present invention is a mobile station apparatus in a communication system including a mobile station apparatus and a base station apparatus, and is applied when a radio resource request is transmitted to the base station apparatus.
  • a resource request prohibition timer is started, and a signal used for radio resource allocation is monitored based on the radio resource request prohibition timer.
  • the mobile station apparatus according to the embodiment of the present invention is characterized in that the mobile station apparatus is in an intermittent reception control state.
  • the mobile station apparatus monitors a signal used for allocation of the radio resource while the radio resource request prohibition timer is operating, and after the radio resource request prohibition timer expires, It is characterized by not monitoring signals used for resource allocation.
  • the mobile station apparatus is based on the radio resource request prohibition timer when the timer value of the radio resource request prohibition timer is set to be less than the radio resource transmission interval for the radio resource request. And monitoring a signal used for the allocation of the radio resource.
  • a base station apparatus in an embodiment of the present invention is a base station apparatus in a communication system including a mobile station apparatus and a base station apparatus, and the mobile station apparatus transmits a radio resource request to the base station apparatus A radio resource request prohibition timer applied to the mobile station apparatus, and when receiving the radio resource request, a signal used for radio resource allocation during the radio resource request prohibition timer operation is transmitted to the mobile station apparatus It is characterized by transmitting to.
  • a communication system in an embodiment of the present invention is a communication system including a mobile station apparatus and a base station apparatus, and the base station apparatus is applied when a radio resource request is transmitted to the base station apparatus.
  • a radio resource request prohibit timer is set in the mobile station apparatus, and the mobile station apparatus starts the radio resource request prohibit timer after transmitting the radio resource request to the base station apparatus, and the radio resource request prohibit timer Based on the above, monitoring of signals used for radio resource allocation is performed.
  • the mobile station device monitors a signal used for radio resource allocation while the radio resource request prohibition timer is operating, and the radio resource request prohibition timer expires. After that, a signal used for the allocation of the radio resource is not monitored.
  • a radio resource request method is a radio resource request method for a mobile station apparatus in a communication system including a mobile station apparatus and a base station apparatus, and transmits a radio resource request to the base station apparatus. And a step of starting a radio resource request prohibition timer applied at the time of monitoring, and a step of monitoring a signal used for allocation of the radio resource based on the radio resource request prohibition timer.
  • An integrated circuit is an integrated circuit mounted on a mobile station apparatus in a communication system including a mobile station apparatus and a base station apparatus, and transmits a radio resource request to the base station apparatus A function of starting a radio resource request prohibition timer that is applied at the time, and a function of monitoring a signal used for allocation of the radio resource based on the radio resource request prohibition timer.
  • An integrated circuit is an integrated circuit mounted on a base station apparatus in a communication system including a mobile station apparatus and a base station apparatus, and the mobile station apparatus sends a radio resource request to the base station A function for setting a radio resource request prohibition timer in the mobile station apparatus, which is applied when transmitting to the station apparatus, and when the radio resource request is received, radio resource allocation is performed during the radio resource request prohibition timer operation.
  • the base station apparatus has a function of transmitting a signal to be used to the mobile station apparatus.
  • each embodiment is disclosed in terms of a mobile station apparatus, a base station apparatus, a communication system, a transmission / reception control method, and an integrated circuit that realize efficient data transmission / reception control.
  • the possible communication methods are not limited to communication methods that are upwardly 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 mobile station apparatus and the base station apparatus aggregate (aggregate) the frequencies (component carriers or frequency bands) of a plurality of different frequency bands (frequency bands) by carrier aggregation into one frequency (frequency band). ) May be applied.
  • Component carriers include uplink component carriers corresponding to the uplink and downlink component carriers corresponding to the downlink.
  • a mobile station apparatus capable of carrier aggregation performs transmission and reception by regarding these as one 100 MHz frequency bandwidth.
  • 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, 2.4 GHz band, and 3.4 GHz band
  • one component carrier is 800 MHz band
  • another component carrier is 2 GHz band
  • another component carrier is 3.4 GHz band. It may be transmitted.
  • the frequency bandwidth of each component carrier may be a frequency bandwidth narrower than the receivable frequency bandwidth (for example, 20 MHz) of the mobile station apparatus, 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. Note that the number of uplink component carriers that the base station apparatus assigns (sets or adds) to the mobile station apparatus is desirably the same as or less than the number of downlink component carriers.
  • a mobile station apparatus and a base station that reduce power consumption and improve the utilization efficiency of radio resources by efficiently making a radio resource request between the mobile station apparatus and the base station apparatus.
  • An apparatus, a communication system, a radio resource request method, and an integrated circuit can be provided.
  • a channel means a medium used for signal transmission
  • a physical channel means a physical medium used for signal transmission.
  • 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. 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 mobile station 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 reporting control parameters (broadcast information (system information); System information) that are commonly used by mobile station apparatuses 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
  • TAI Tracking Area Identifier
  • 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.
  • a mobile station apparatus measures reception quality for every cell by receiving cell specific RS.
  • the mobile station apparatus also uses the downlink 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 mobile station apparatus is called UE specific reference signals (URS) or Dedicated RS (DRS), and demodulates the physical downlink control channel or the physical downlink shared channel. Sometimes referred to for channel compensation processing.
  • 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 mobile station apparatus. It is used for the purpose of instructing the radio resource allocation information and the adjustment amount of increase / decrease in transmission power.
  • the mobile station apparatus monitors (monitors) a physical downlink control channel addressed to itself before transmitting / receiving a layer 3 message (paging, handover command, etc.) that is downlink data or downlink control data, and By receiving the physical downlink control channel, it is necessary to acquire radio resource allocation information called an uplink grant at the time of transmission and a downlink grant (downlink assignment) at the time of reception from the physical downlink control channel.
  • the physical downlink control channel is configured to be transmitted in the area of the resource block that is individually assigned to the mobile station apparatus from the base station apparatus in addition to the above-described ODFM symbol. Is also possible.
  • a physical uplink control channel is a reception acknowledgment (ACK / NACK; Acknowledgement / Negative Acknowledgement) or downlink propagation path (channel state) information of data transmitted on the physical downlink shared channel.
  • CSI Channel State Information
  • SR scheduling request
  • CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), PTI (Precoding Type Indicator), and RI (Rank Indicator).
  • CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), PTI (Precoding Type Indicator), and RI (Rank Indicator).
  • Each indicator may be expressed as “Indication”, but its use and meaning are the same.
  • the physical downlink shared channel (PDSCH: Physical Downlink Shared Channel) is also used to notify the mobile station apparatus as layer 3 message broadcast information (system information) not notified by the paging or physical broadcast information channel in addition to downlink data. used.
  • 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 and a sounding reference signal (SRS; Sounding Reference Signal) used mainly by the base station apparatus to estimate the uplink channel state It is.
  • Sounding reference signals include a periodic sounding reference signal (Periodic SRS) and an aperiodic sounding reference signal (Aperiodic SRS).
  • 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 a means for accessing the base station apparatus of the mobile station apparatus.
  • the mobile station apparatus transmits a radio resource request when the physical uplink control channel is not set, and transmission timing adjustment information (Timing Advance (TA)) required to match the uplink transmission timing with the reception timing window of the base station apparatus.
  • TA Transmission Advance
  • the physical random access channel is used to request the base station apparatus.
  • the mobile station apparatus transmits a preamble sequence using the radio resource for the physical random access channel set by the base station apparatus.
  • the mobile station apparatus that has received the transmission timing adjustment information is commonly set by the broadcast information (or individually set by the layer 3 message), and a transmission timing timer (TA timer) that counts the valid time of the transmission timing adjustment information
  • TA timer transmission timing timer
  • the uplink state is managed while the transmission timing timer is in the transmission timing adjustment state during the effective time (during time measurement) and the transmission timing is not adjusted (transmission timing unadjusted state) outside the effective period (during stop).
  • the layer 3 message is a control-plane message exchanged between the mobile station apparatus and the RRC (radio resource control) layer of the base station apparatus, 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.
  • 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 mobile station device When a mobile station device operates in a cell and moves from one cell to another cell, it performs a cell reselection procedure during non-wireless connection (during non-communication), and a handover procedure during wireless connection (during communication). To move to another suitable cell.
  • a suitable cell generally indicates a cell in which access of a mobile station 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 mobile station apparatus may be wirelessly connected to the base station apparatus via a relay station apparatus (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).
  • NodeB Node B
  • eNodeB a mobile station apparatus in EUTRA and Advanced EUTRA defined by 3GPP
  • the base station apparatus manages, for each frequency, a cell that is an area in which the mobile station apparatus can communicate with the base station apparatus.
  • 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 mobile station apparatus.
  • the cell used for communication with the mobile station device among the cells of the base station device is a serving cell (Serving cell). This cell is referred to as a neighbor cell.
  • intermittent reception control / intermittent transmission control is performed in order to efficiently allocate radio resources to each mobile station device by the base station device and to reduce power consumption of the mobile station device.
  • DRX parameters intermittent reception period, intermittent reception period, retransmission period, extended reception period, etc.
  • the intermittent reception cycle indicates a cycle for performing intermittent reception.
  • the intermittent reception period is a period for monitoring the physical downlink control channel (PDCCH) in one intermittent reception period.
  • the retransmission period is a period in which reception of the physical downlink shared channel (PSDSCH) fails and data for retransmission may be transmitted from the base station apparatus.
  • the mobile station apparatus performs physical downlink during this period. Monitor the link control channel.
  • the reception extension period is a period in which monitoring of the physical downlink control channel is extended when a downlink grant / uplink grant addressed to the mobile station is received on the physical downlink control channel.
  • the mobile station apparatus monitors the physical downlink control channel (PDCCH) during an active time (Active time).
  • the active time indicates a period such as an intermittent reception period, a retransmission period, or a reception extension period given by the DRX parameter.
  • the active time indicates a period determined by the state of the mobile station apparatus 1 other than the period set by the DRX parameter.
  • the following two radio resource request methods are prepared as methods for a mobile station device to start transmission of uplink data to a base station device.
  • the base station apparatus assigns the configuration (configuration) related to the transmission resource of the physical uplink control channel necessary for making a radio resource request to the mobile station apparatus
  • the mobile station apparatus moves This is a method in which a station apparatus makes a radio resource request (requests for uplink grant transmission) to a base station apparatus using a physical uplink control channel.
  • the mobile station apparatus has a physical uplink shared channel (uplink grant) for transmitting uplink data when uplink data is retained in the uplink buffer.
  • uplink grant physical uplink shared channel
  • the radio resource request is put in a pending state (Pending).
  • SR-PUCCH physical uplink control channel
  • the mobile station apparatus transmits SR-PUCCH. Transmit and request radio resources from the base station apparatus.
  • the pending state of the radio resource request is canceled when the mobile station apparatus receives an uplink grant.
  • the mobile station apparatus When transmitting the SR-PUCCH, the mobile station apparatus increments the transmission counter of the physical uplink control channel and starts measuring the radio resource request prohibition timer (SR Prohibit Timer) according to the setting. The mobile station apparatus does not transmit SR-PUCCH when the radio resource request prohibition timer is counting.
  • SR Prohibit Timer radio resource request prohibition timer
  • the mobile station apparatus transmits SR-PUCCH, and further monitors the physical downlink control channel using a period in which the radio resource request is in a pending state (Pending) as an active time. .
  • a mobile station apparatus that transmits SR-PUCCH and whose radio resource request is on hold monitors a physical downlink control channel in order to detect uplink grant allocation in each subframe after SR-PUCCH transmission.
  • the mobile station apparatus periodically transmits SR-PUCCH until the physical uplink shared channel is assigned by the uplink grant.
  • the mobile station apparatus increments the transmission counter and counts the number of transmissions. If the mobile station apparatus cannot receive the uplink grant from the base station apparatus even if the SR-PUCCH transmission counter reaches the maximum number of SR-PUCCH transmissions, the mobile station apparatus releases the physical uplink control channel resource, Start resource request method.
  • the mobile station apparatus is in a transmission timing adjustment state.
  • the mobile station apparatus In the second radio resource request method, (1) the mobile station apparatus is in a transmission timing adjustment state, but the base station apparatus allocates an uplink shared channel necessary for making a radio resource request to the mobile station apparatus. This is implemented when there is no, or (2) TA timer is not operating (transmission timing non-adjusted state).
  • the mobile station apparatus makes a radio resource request to the base station apparatus using a physical random access channel, and follows a random access procedure.
  • the mobile station apparatus releases the pending state of the radio resource request.
  • the present embodiment relates to a radio resource request method of the mobile station apparatus 1, and particularly shows a radio resource request method based on determination of a radio resource request method when the mobile station apparatus 1 is communicating.
  • FIG. 1 is a block diagram showing an example of a mobile station apparatus 1 according to an embodiment of the present invention.
  • the mobile station apparatus 1 includes a reception unit 101, a demodulation unit 102, a decoding unit 103, a measurement processing unit 104, a control unit 105, an uplink buffer control unit 106, an encoding unit 107, a modulation unit 108, a transmission unit 109, an uplink radio.
  • a resource request control unit 110, a random access control unit 111, and an upper layer 112 are included.
  • the upper layer 112 is a block that realizes a specific function of an RRC (Radio Resource Control) layer that performs radio resource control.
  • the uplink buffer control unit 106, the uplink radio resource request control unit 110, and the random access control unit 111 are blocks that realize specific functions of a MAC (Medium Access Control) layer that manages the data link layer.
  • MAC Medium Access Control
  • the mobile station apparatus 1 has a reception system block (reception unit 101, demodulation unit 102, decoding unit 103) to support simultaneous reception of a plurality of frequencies (frequency band, frequency bandwidth) by carrier aggregation, and In order to support simultaneous transmission of a plurality of frequencies (frequency bands, frequency bandwidths), a plurality of transmission system blocks (encoding unit 107, modulation unit 108, transmission unit 109) may be provided.
  • a reception system block reception unit 101, demodulation unit 102, decoding unit 103
  • a plurality of transmission system blocks encoding unit 107, modulation unit 108, transmission unit 109
  • the mobile station apparatus control information is input from the upper layer 112 to the control unit 105.
  • the mobile station apparatus control information is information necessary for radio communication control of the mobile station apparatus 1 configured by the reception control information and the transmission control information.
  • the radio connection resource setting, cell-specific transmission individually transmitted from the base station apparatus 2 is performed.
  • the higher layer 112 inputs the information 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 DRX control information, reception timing for each channel, multiplexing method, and radio resource arrangement information in addition to reception frequency band information.
  • 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. Moreover, when the radio
  • 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 112. Each data is also input to the measurement processing unit 104.
  • 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.
  • mobile station apparatus control information that is a control parameter for controlling each block is input from the upper layer 112 to the control unit 105, and transmission control information that is control information regarding transmission is transmitted to the uplink buffer control unit 106.
  • the transmission control information includes information such as DTX control information, coding information, modulation information, transmission frequency band information, transmission timing for each channel, multiplexing method, and radio resource allocation information as uplink scheduling information of the transmission signal. ing.
  • Random access setting information is input from the upper layer 112 to the random access control unit 111.
  • 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 112 manages transmission timing adjustment information and a transmission timing timer used for uplink transmission timing adjustment, and states of uplink transmission timing (transmission timing adjustment) for each cell (or for each cell group and each TA group). Status or transmission timing non-adjusted state).
  • the transmission timing adjustment information and the transmission timing timer are included in the transmission control information.
  • the upper layer 112 manages transmission timing adjustment information corresponding to the uplink transmission timing of each of the plurality of cells (or cell groups and TA groups). To do.
  • the generated transmission data (uplink data and uplink control data) is input from the higher layer 112 to the uplink buffer control unit 106 at an arbitrary timing. At this time, the uplink buffer control unit 106 calculates the amount of input transmission data (uplink buffer amount). Resource request setting information is set in the uplink radio resource request control unit 110 by the higher layer 112. The resource request setting information includes at least transmission counter setting information and radio resource request prohibition timer information. Further, when the transmission data is input to the uplink buffer control unit 106, the uplink buffer control unit 106 notifies the uplink radio resource request control unit 110 of the generation of the transmission data, thereby transmitting to the uplink buffer. Signals that data exists.
  • the uplink radio resource request control unit 110 determines whether radio resources necessary for transmitting the input transmission data are allocated.
  • the uplink radio resource request control unit 110 receives one of the physical uplink shared channel PUSCH, the radio resource request by the physical uplink control channel (SR-PUCCH), or the physical random access channel based on the radio resource allocation. Select and request control processing for transmitting the selected channel to the encoding unit 107 and / or the random access control unit 111.
  • the encoding unit 107 allocates radio resources that have been allocated in accordance with an instruction from the uplink radio resource request control unit 110.
  • the transmission data corresponding to is acquired from the uplink buffer control unit 106, encoded, and output to the modulation unit 108.
  • the encoding unit 107 performs SR- in accordance with an instruction from the uplink radio resource request control unit 110. Control data necessary for transmission of PUCCH is encoded and output to modulation section 108.
  • the encoding unit 107 performs random access procedure for the random access control unit 111. Instruct to start. At this time, the encoding unit 107 generates a preamble sequence transmitted through the physical random access channel based on the random access data information input from the random access control unit 111. The encoding unit 107 appropriately encodes each data according to the transmission control information and outputs the data to the modulation unit 108.
  • SR-PUCCH radio resource request
  • 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 (also for each cell group and each TA group) input from the higher layer 112.
  • 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.
  • FIG. 1 other components of the mobile station apparatus 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 mobile station apparatus 1 are omitted. It is clear to have as a component.
  • FIG. 2 is a block diagram showing an example of the base station apparatus 2 according to the 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 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 208 inputs downlink data and 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 mobile station device 1 into a baseband digital signal.
  • the reception 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 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 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 part of the upper layer 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 exchange of information related to transmission / reception control between the mobile station apparatus 1 and the base station apparatus 2 in the present embodiment.
  • FIG. 3 shows a state transition of a radio resource request (SR state in the figure) when the mobile station device 1 makes a radio resource request to the base station device 2, and a timer indicating an SR-PUCCH transmission prohibited section. It is the figure explaining a horizontal axis as a time axis about a state (radio resource request prohibition timer in a figure) and a transition (PDCCH monitoring state in a figure) of a monitoring state (active time) of a physical downlink control channel. Further, DRX / DTX control is applied to the mobile station apparatus 1.
  • transmission / reception control of the mobile station apparatus 1 from timing T11 to timing T12 will be described.
  • This section shows transmission / reception control of the mobile station apparatus 1 when DRX control is applied to the mobile station apparatus 1 and no transmission data is generated by the timing T11.
  • the mobile station apparatus 1 starts monitoring PDCCH at timing T11 based on the set DRX control setting (PDCCH monitoring state: ON).
  • the mobile station apparatus 1 needs to continue monitoring the PDCCH for a predetermined duration P01 from the timing T11 (PDCCH monitoring state: ON), but may not monitor the PDCCH after the duration P01 has elapsed.
  • This section indicates transmission / reception control when it is determined that DRX control is applied to the mobile station apparatus 1 and SR-PUCCH transmission is performed for a radio resource request.
  • the transmission / reception control of the mobile station apparatus 1 in this section when transmission data is generated, the transmission data is not in a state in which the transmission data can be transmitted by the physical uplink shared channel PUSCH, and the SR-PUCCH can be used.
  • the SR state of the mobile station device 1 is changed to the Pending state.
  • the SR state of the mobile station apparatus 1 before the timing T12 is managed as a non-pending state.
  • the mobile station apparatus 1 whose SR state has changed to the Pending state transmits SR-PUCCH (SR11) at the latest timing T13 at which SR-PUCCH can be transmitted. At this time, the mobile station apparatus 1 increments the counter of the number of SR transmissions.
  • the mobile station apparatus 1 determines the SR-PUCCH transmission timing (timing T13) based on the SR-PUCCH transmission setting. In addition, the mobile station apparatus 1 starts a radio resource request prohibition timer simultaneously with the transmission of the SR-PUCCH (SR11).
  • the section in which the radio resource request prohibition timer counts (radio resource request prohibition timer: running) is an SR-PUCCH transmission prohibition section, and is a subframe monitoring section for each PDCCH.
  • the continuous time P02 set by the base station apparatus 2 is applied to the radio resource request prohibition timer.
  • the mobile station apparatus 1 monitors the PDCCH every subframe from timing T13 to timing T14 when the radio resource request prohibition timer expires (PDCCH monitoring state: ON).
  • the mobile station apparatus 1 transmits SR-PUCCH, and monitors the PDCCH every subframe with the radio resource request prohibition timer operating (or the radio resource request prohibition timer running) as the active time. To do. Furthermore, in other words, the mobile station apparatus 1 receives the PDCCH transmitted from the base station apparatus 2 every subframe in the section from the timing T13 to the timing T14, and allocates the uplink radio resource notified using the PDCCH. It monitors whether or not the signal information (uplink grant (UL grant)) to be used is detected.
  • uplink grant UL grant
  • the value of the radio resource request prohibition timer may be expressed based on the SR-PUCCH radio resource interval (interval from one SR-PUCCH radio resource to the next SR-PUCCH radio resource: SR period).
  • FIG. 3 shows a case where the value of the radio resource request prohibition timer is set to 1 / n.
  • the mobile station apparatus 1 When the value of the radio resource request prohibition timer is set to 1 / n from the base station apparatus 2 (that is, when the value of the radio resource request prohibition timer is less than the SR-PUCCH radio resource interval), the mobile station apparatus 1 The PDCCH is monitored every subframe with an active time of 1 / n from the transmission of SR-PUCCH to the next SR-PUCCH radio resource. At this time, the SR-PUCCH can be transmitted from the next SR-PUCCH radio resource.
  • the value of the radio resource request prohibition timer is set to 1 from the base station apparatus 2
  • the period from when the mobile station apparatus 1 transmits SR-PUCCH to the radio resource of the next SR-PUCCH As active time, PDCCH is monitored every subframe (section from timing T13 to timing T15 in FIG. 3). At this time, the SR-PUCCH can be transmitted from the next SR-PUCCH radio resource (SR12).
  • the SR-PUCCH can be transmitted from the SR-PUCCH radio resource (SR13) which is the next SR-PUCCH.
  • the mobile station apparatus 1 When the value of the radio resource request prohibition timer is given as an integer (0, 1, 2, etc.) from the base station apparatus 2, the mobile station apparatus 1 transmits SR-PUCCH, and the radio resource request is suspended.
  • the PDCCH is monitored using the period of (Pending) as an active time, and the value of the radio resource request prohibition timer is given by the base station apparatus 2 as a value other than an integer (for example, 1 / n), the mobile station The apparatus 1 may transmit the SR-PUCCH and monitor the PDCCH every subframe with the active time as the radio resource request prohibition timer is operating.
  • the mobile station apparatus 1 transmits the SR-PUCCH, and the radio resource request prohibition timer
  • the PDCCH may be monitored for each subframe with the active time as a period during which is operated.
  • the SR-PUCCH radio resource interval (SR Period) is set at a long interval (for example, 80 ms (milliseconds) or more), and the value of the radio resource request prohibition timer from the base station apparatus 2 is other than an integer (for example, 1 / n Etc.), the mobile station apparatus 1 transmits SR-PUCCH, and the PDCCH is monitored every subframe with the active time as the radio resource request prohibition timer is operating. good.
  • the mobile station apparatus 1 transmits the SR-PUCCH, and the radio resource request prohibition timer
  • the PDCCH may be monitored for each subframe with a part of the period in which P is operating as the active time. For example, the mobile station apparatus 1 may monitor the PDCCH every subframe using the 1 / n interval of the radio resource request prohibition timer after the transmission of SR-PUCCH as an active time.
  • an additional parameter may be set such that the PDCCH is monitored in some subframes from when the radio resource request prohibition timer is activated until it expires.
  • the PDCCH may be monitored only in even-numbered subframes, odd-numbered subframes, or some set subframes when the radio resource request prohibition timer is operating.
  • a section obtained by adding an offset value to the radio resource request prohibition timer may be regarded as the active time.
  • the additional parameter may be set individually for each mobile station device 1 or may be fixedly set by the system, and may be set autonomously from information unique to the mobile station device 1.
  • the value of the radio resource request prohibition timer may be expressed in time (ms (milliseconds)). Further, it may be expressed by the number of frames or the number of subframes.
  • the mobile station apparatus 1 May not monitor PDCCH from timing T14 until timing T15 when the next SR-PUCCH radio resource is set.
  • the timing T15 when the SR-PUCCH radio resource is present is equal to the timing when the SR-PUCCH transmission interval (SR Period) has elapsed from the SR-PUCCH (SR11) transmitted immediately before by the mobile station apparatus 1.
  • the mobile station apparatus 1 sets a section (section from timing T14 to timing T15) in which the physical downlink control channel PDCCH need not be monitored. It is possible to suppress power consumption used for the purpose. In particular, as the SR-PUCCH transmission interval (SR Period) is longer, the radio resource utilization efficiency and the power consumption suppression effect increase.
  • SR Period SR-PUCCH transmission interval
  • the mobile station apparatus 1 transmits SR-PUCCH (SR12) at timing T15, which is the SR-PUCCH transmission interval (SR Period).
  • SR-PUCCH SR-PUCCH
  • the mobile station device 1 increments the counter of the number of SR transmissions.
  • the mobile station apparatus 1 starts a radio resource request prohibition timer simultaneously with the transmission of the SR-PUCCH (SR12), and performs the same reception control described in the section from the timing T13 to the timing T15 regarding the PDCCH monitoring from the timing T15 to the timing T17. This also applies to the interval and the following intervals.
  • the mobile station apparatus 1 will receive an uplink grant (from the base station apparatus 2 until the maximum number of consecutive transmissions of SR-PUCCH reaches the maximum number of transmissions). The same reception control is repeated until (UL grant) is received (detected).
  • the mobile station apparatus 1 when the mobile station apparatus 1 receives an uplink grant (UL grant) from the base station apparatus 2 at the timing R11 in the section of the continuous time P02 corresponding to the SR-PUCCH (SR13) transmitted at the timing T17.
  • the timing R11 at which the base station apparatus 2 transmits the uplink grant to the mobile station apparatus 1 is within the operation period of the radio resource request prohibition timer applied to the mobile station apparatus 1.
  • the mobile station apparatus 1 changes the SR state from the Pending state to the Non-Pending state, further stops the radio resource request prohibition timer, and ends the active time by the radio resource request prohibition timer. Then, the active time in the reception extension period of the DRX control is continued, and the operation returns to the operation of continuing to monitor the PDCCH. (PDCCH monitoring state: ON).
  • the mobile station apparatus 1 can regard a section other than the section in which the timer is counting as a section in which the physical downlink control channel need not be monitored. Further, the base station device 2 can transmit a physical downlink control channel to the mobile station device 1 in a section in which the timer is counting after receiving the SR-PUCCH, and the timer is counting The physical downlink control channel may not be transmitted to the mobile station device 1 except for the section.
  • the mobile station apparatus 1 is configured so that the physical station for radio resource request is based on the setting of the physical uplink control channel for radio resource request notified from the base station apparatus 2. After transmitting the uplink control channel, a section in which the physical downlink control channel is not monitored can be set based on a timer, so that the power consumption of the mobile station apparatus 1 can be reduced while improving the utilization efficiency of radio resources. it can.
  • this uplink transmission scheme can be applied to both communication systems of the FDD (frequency division duplex) scheme and the TDD (time division duplex) scheme.
  • 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 mobile station device 1 is not limited to a mobile terminal, and the embodiment of the present invention may be realized by mounting the function of the mobile station device 1 on a fixed terminal.
  • the mobile station device is also referred to as a user terminal, a terminal device, a communication terminal, a mobile device, a mobile station, a UE (User Equipment), and an MS (Mobile Station).
  • the base station apparatus 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), or a BS (Base Station). .
  • the mobile station device 1 and the base station device 2 of the embodiment have been described using functional block diagrams. However, the functions of each part of the mobile station device 1 and the base station device 2 or one of these functions The steps of the method or algorithm for realizing the part may be directly embodied by hardware, software module executed by a 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.
  • the “computer system” includes an OS and hardware such as peripheral devices.
  • a program that operates in the mobile station apparatus 1 and the base station apparatus 2 according to each embodiment of the present invention is a program (computer) that controls the CPU and the like so as to realize the functions of the above-described embodiments according to the respective embodiments of the present invention.
  • a program that functions Is a program that functions).
  • 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.
  • 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, the program described above may be realized in combination with a program already recorded in the computer system. good.
  • each functional block or various features of the mobile station apparatus 1 and the base station apparatus 2 used in each of the above embodiments includes a general-purpose processor, a digital signal designed to execute the functions described in this specification.
  • a processor DSP
  • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un appareil de station mobile, un appareil de station de base, un système de communication, un procédé de requête de ressources radio et un circuit intégré dans lesquels la requête de ressources radio entre l'appareil de station mobile et l'appareil de station de base est effectuée efficacement, permettant ainsi d'améliorer à la fois la réduction de la consommation d'énergie et l'efficacité d'utilisation des ressources radio. Un appareil de station de base règle, au niveau d'un appareil de station mobile, un minuteur d'inhibition de requête de ressources radio qui doit être appliqué lorsqu'une requête de ressources radio a été transmise. L'appareil de station mobile met en marche le minuteur d'inhibition de requête de ressources radio après avoir transmis la requête de ressources radio et surveille, sur la base du minuteur d'inhibition de requête de ressources radio, un signal à utiliser pour une allocation de ressources radio.
PCT/JP2013/062829 2012-05-09 2013-05-07 Appareil de station mobile, appareil de station de base, système de communication, procédé de requête de ressources radio et circuit intégré WO2013168697A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-107211 2012-05-09
JP2012107211A JP2013236240A (ja) 2012-05-09 2012-05-09 移動局装置、基地局装置、通信システム、無線リソース要求方法および集積回路

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011002386A1 (fr) * 2009-06-29 2011-01-06 Telefonaktiebolaget L M Ericsson (Publ) Procédé et système dans un système de communication sans fil

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011002386A1 (fr) * 2009-06-29 2011-01-06 Telefonaktiebolaget L M Ericsson (Publ) Procédé et système dans un système de communication sans fil

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ERICSSON ET AL.: "Allowing DRX during UL scheduling", 3GPP R2-120439, 10 February 2012 (2012-02-10) *
VIA TELECOM: "DRX Operation with SR Prohibit Timer", 3GPP R2-100288, 22 January 2010 (2010-01-22) *

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