WO2013161789A1 - Terminal device, base station device, communication system, wireless resource request method, and integrated circuit - Google Patents

Abstract

Provided are a terminal device, base station device, communication system, wireless resource request method, and integrated circuit whereby power consumption is reduced and the usage efficiency of wireless resources is enhanced, by efficient requesting of wireless resources between a mobile station device and a base station device. The base station device notifies a terminal device of a monitoring timer for monitoring signal information that is used to allocate wireless resources and applied when a wireless resource request is transmitted, and the terminal device starts the monitoring timer after transmission of the wireless resource request and monitors the signal information used to allocate wireless resources on the basis of the monitoring timer.

Description

Terminal apparatus, base station apparatus, communication system, radio resource request method, and integrated circuit

Embodiments of the present invention provide a terminal device, a base station device, and a communication device that reduce power consumption and improve the utilization efficiency of radio resources by efficiently performing radio resource requests between a mobile station device and a base station device. The present invention relates to a system, a radio resource request method, and an 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 The standardization of Universal Terrestrial Radio Access (hereinafter referred to as EUTRA) was carried out.

Also, 3GPP is discussing Advanced EUTRA, which realizes higher-speed data transmission and has upward compatibility with EUTRA. In EUTRA and Advanced EUTRA, not only high-speed data communication is realized, but also a problem that the power consumption of the mobile station device increases due to a plurality of applications constantly operating on the mobile station device, and the radio consumed by the application. Discussions have also been conducted to increase resource utilization efficiency (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. At this time, when 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.

However, as shown in 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. When considering the communication state, 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. There is a problem that 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.

However, 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.

In view of the above problems, 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. It is an object of the present invention to provide a technique related to a terminal device, a base station device, a communication system, a radio resource request method, and an integrated circuit.

(1) In order to achieve the above objective, the following measures were taken. That is, a terminal apparatus in an embodiment of the present invention is a terminal apparatus in a communication system including a terminal apparatus and a base station apparatus, and allocates an uplink radio resource after transmitting an uplink radio resource request to the base station apparatus. Start a monitoring timer for monitoring the signal information to be used, and while the monitoring timer is operating, monitor the signal information used for the allocation of the uplink radio resources, and after the monitoring timer expires, Signal information used for allocation of the uplink radio resource is not monitored until the uplink radio resource request is transmitted.

(2) Further, in the terminal device according to the embodiment of the present invention, an offset value used for adjusting an activation time of the monitoring timer is applied to the monitoring timer.

(3) Further, the terminal device according to the embodiment of the present invention is characterized in that the monitoring timer is stopped when the signal information used for the allocation of the uplink radio resource is detected.

(4) The base station apparatus in the embodiment of the present invention is a base station apparatus in a communication system including a terminal apparatus and a base station apparatus, and an uplink radio resource request is transmitted to the base station apparatus. In this case, the terminal device is notified of a monitoring timer applied to the terminal device for monitoring signal information used for uplink radio resource allocation.

(5) In addition, the base station apparatus according to the embodiment of the present invention notifies the terminal apparatus of an offset value used for adjusting the startup time of the monitoring timer.

(6) A communication system according to an embodiment of the present invention is a communication system including a terminal device and a base station device, and the base station device transmits an uplink radio resource request to the base station device. The terminal device is notified of a monitoring timer for monitoring signal information used for uplink radio resource allocation applied to the terminal device, and the terminal device transmits the uplink radio resource request to the base station device. Starts the monitoring timer, monitors the signal information used for the allocation of the uplink radio resource while the monitoring timer is operating, and then transmits the uplink radio resource request next after the monitoring timer expires Until then, the signal information used for the allocation of the uplink radio resource is not monitored.

(7) In addition, the base station apparatus of the communication system according to the embodiment of the present invention notifies the terminal apparatus of an offset value used for adjusting the activation time of the monitoring timer.

(8) Further, the terminal device of the communication system according to the embodiment of the present invention is characterized in that the monitoring timer is stopped when the signal information used for the allocation of the uplink radio resource is detected.

(9) A radio resource request method for a terminal apparatus in an embodiment of the present invention is a radio resource request method for a terminal apparatus in a communication system including the terminal apparatus and a base station apparatus, and the uplink radio resource request Starting a monitoring timer for monitoring signal information used for allocation of uplink radio resources after transmission to the base station apparatus, and signal information used for allocation of the uplink radio resources while the monitoring timer is operating And at least a step of not monitoring signal information used for allocation of the uplink radio resource until the next uplink radio resource request is transmitted after the monitoring timer expires. To do.

(10) An integrated circuit of a terminal apparatus in an embodiment of the present invention is an integrated circuit mounted on a terminal apparatus in a communication system including the terminal apparatus and a base station apparatus, and an uplink radio resource request is transmitted to the base station. A function for starting a monitoring timer for monitoring signal information used for allocation of uplink radio resources after transmission to a station apparatus; and, when the monitoring timer is operating, signal information used for allocation of uplink radio resources. A series of functions including a function of monitoring and a function of not monitoring signal information used for allocation of the uplink radio resource until the next uplink radio resource request is transmitted after the monitoring timer expires. It is characterized by being exhibited by a terminal device.

(11) Moreover, the integrated circuit of the base station apparatus in the embodiment of the present invention is an integrated circuit mounted on a base station apparatus in a communication system including a terminal apparatus and a base station apparatus. A function of notifying the terminal device of a monitoring timer that is applied to the terminal device when the uplink wireless resource request is transmitted and for monitoring signal information used for uplink radio resource allocation. The base station apparatus exhibits the above function.

In this specification, each embodiment is disclosed in the technology of a terminal device, a base station device, a communication system, a transmission / reception control method, and an integrated circuit that realize efficient data transmission / reception control, but can be applied to each embodiment. Such a communication method is not limited to a communication method that is upwardly compatible with EUTRA, such as EUTRA or Advanced EUTRA.

For example, the techniques described herein include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal FDMA (OFDMA) systems, single carrier FDMA (SC -Can be used in various communication systems, such as FDMA) systems, and other systems. Further, in this specification, a system and a network can be used synonymously.

In addition, 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.

For example, when five component carriers having a frequency bandwidth of 20 MHz are aggregated by carrier aggregation, 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. For example, when 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, and another component carrier is 3.4 GHz band. It may be transmitted.

Also, it is possible to aggregate a plurality of continuous or discontinuous component carriers in the same frequency band. 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.

According to an embodiment of the present invention, a terminal device and a base station device that reduce power consumption and improve the utilization efficiency of radio resources by efficiently making a radio resource request between a mobile station device and a base station device In addition, a technique related to a communication system, a radio resource request method, and an integrated circuit can be provided.

It is a block diagram which shows schematic structure of the mobile station apparatus in embodiment of this invention. It is a block diagram which shows schematic structure of the base station apparatus in embodiment of this invention. It is a figure which shows an example of the transmission / reception operation | movement of the mobile station apparatus in the 1st Embodiment of this invention. It is a figure which shows an example of the transmission / reception operation | movement of the mobile station apparatus in the 2nd Embodiment of this invention.

DETAILED DESCRIPTION Before describing each embodiment of the present invention, a technique related to each embodiment of the present invention will be briefly described below.

[Physical channel / Physical signal]
The main physical channels and physical signals used in EUTRA and Advanced EUTRA will be described. A channel means a medium used for transmission of signals (signal information), and a physical channel means a physical medium used for transmission of signals (signal information). In the present invention, 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.

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). Also, 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 (PBCH) 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. As broadcast information, 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.

Downlink reference signals are classified into multiple types according to their use. For example, cell-specific reference signals (RS) 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. As a sequence used for the cell-specific RS, a sequence that can be identified for each cell is used.

Also, 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). In addition, 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 (PDCCH) 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) the physical downlink control channel addressed to the local station apparatus before transmitting / receiving a layer 3 message (paging, handover command, etc.) that is downlink data or downlink control data. By receiving the physical downlink control channel addressed to the device, 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 (PUCCH) 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), used to make a scheduling request (SR) that is an uplink radio resource allocation request (radio resource request). 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 (PUSCH) 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. The physical random access channel is used to request the base station apparatus.

Specifically, 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 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.

[Wireless network]
The communicable range of each frequency controlled by the base station apparatus is regarded as a cell. At this time, the areas (cells) covered by each frequency may have different widths and different shapes. Moreover, the area to cover may differ for every frequency. 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.

Note that 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). Note that a mobile station apparatus in EUTRA and Advanced EUTRA defined by 3GPP is referred to as a UE (User Equipment). 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. In addition, when the mobile station device can communicate with a certain base station device, 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.

[Scheduling Request]
In EUTRA, 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. In the first radio resource request method, when 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.

In the first radio resource request method, the mobile station apparatus is when uplink data is retained in an uplink buffer, and a physical uplink shared channel for transmitting the uplink data is not allocated. (When no uplink grant is detected), the radio resource request is put in a pending state (Pending). When the mobile station apparatus is in a radio resource request pending state and can transmit a physical uplink control channel (hereinafter referred to as SR-PUCCH) used for the radio resource request, the mobile station apparatus transmits SR-PUCCH. Transmit and request radio resources from the base station apparatus.

At this time, 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. In addition, when the mobile station apparatus applies discontinuous reception (DRX) control / intermittent transmission (DTX) control as transmission / reception control, from intermittent reception control / intermittent transmission control to non-intermittent reception control / non-transmission control. The transmission / reception control is changed so that intermittent transmission control is applied.

A mobile station apparatus that transmits SR-PUCCH and whose radio resource request is in a pending state performs physical downlink control in order to detect radio resource allocation (transmission of uplink grant) in each subframe after SR-PUCCH transmission. Monitor the channel. Also, the mobile station apparatus periodically transmits SR-PUCCH until the physical uplink shared channel is assigned by the uplink grant from the base station apparatus. Each time the mobile station apparatus transmits SR-PUCCH, it increments the transmission counter and counts the number of transmissions. If the mobile station apparatus cannot detect the uplink grant 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, and performs the second radio resource request method. Start. In the first radio resource request method, the mobile station apparatus is in a transmission timing adjustment state.

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). In the second radio resource request method, 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.

When the physical uplink shared channel is allocated from the base station apparatus by the first radio resource request method or the second radio resource request method, the mobile station apparatus releases the pending state of the radio resource request.

In consideration of the above matters, preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In the description of the embodiment of the present invention, when it is determined that a specific description of known functions and configurations related to the embodiment of the present invention obscures the gist of the embodiment of the present invention. Detailed description thereof will be omitted.

<First Embodiment>
A first embodiment of the present invention will be described below. 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 the first 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.

Note that 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.

Regarding the reception, 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. Further, the control unit 105 inputs measurement setting information used for measurement event determination as to whether or not the measurement result of the mobile station apparatus 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. In the measurement setting information, 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. Moreover, the receiving part 101 performs PDCCH monitoring according to a PDCCH monitoring timer, when the PDCCH monitoring timer setting mentioned later is applied as reception control information. 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. The measurement processing unit 104 also uses the measurement result as one of parameters for determining success or failure of the set measurement event.

Also, the measurement processing unit 104 inputs the measurement result to the upper layer 112 as measurement result information. In addition, when one or a plurality of set measurement events are established (that is, when a set measurement event condition is satisfied), 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 112 as information. In addition, 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 112 as measurement result information.

Also, regarding transmission, 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. Are appropriately input to the encoding unit 107, the modulation unit 108, and the transmission unit 109. 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. Further, 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.

When it is necessary to manage a plurality of uplink transmission timing states, 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.

That is, when radio resources have already been allocated and transmission data can be transmitted using the physical uplink shared channel PUSCH, 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. Alternatively, when radio resources are not allocated and when a radio resource request (SR-PUCCH) using a physical uplink control channel is possible, 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.

Alternatively, when radio resources are not allocated and radio resource request (SR-PUCCH) using the physical uplink control channel is impossible, 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.

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.

In 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 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 208, and a network signal transmission / reception unit 209. Note that 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).

Also, the receiving unit 201 converts the signal received from the mobile station device 1 into a baseband digital signal. When cells having a plurality of different transmission timings are set for the mobile station apparatus 1, 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.

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. Are appropriately input to each block of the receiving unit 201, the demodulating unit 202, and the decoding unit 203. The RRC of the base station device 2 exists as part of the upper layer 208.

On the other hand, 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. In FIG. 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 the state transition of the radio resource request (SR state in the figure) and the transition of the monitoring state of the physical downlink control channel (when the mobile station device 1 makes a radio resource request to the base station device 2). It is the figure explaining a horizontal axis as a time axis about (PDCCH monitoring state in a figure). Further, DRX / DTX control is applied to the mobile station apparatus 1.

First, 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.

Subsequently, transmission / reception control of the mobile station apparatus 1 from timing T12 to timing T17 will be described. 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. In other words, in 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. This is transmission / reception control that is applied when the uplink radio resource request control unit 110 determines that there is one.

When the transmission data is generated at timing T12, the SR state of the mobile station device 1 is changed to the Pending state. Although omitted in FIG. 3 for simplification of description, 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. Further, the mobile station apparatus 1 starts a PDCCH monitoring timer simultaneously with transmission of the SR-PUCCH (SR11). The continuous monitoring time P02 set by the base station apparatus 2 is applied to the PDCCH monitoring timer. The mobile station apparatus 1 monitors the PDCCH every subframe from timing T13 to timing T14 when the PDCCH monitoring timer expires (PDCCH monitoring state: ON). That is, the mobile station apparatus 1 monitors the PDCCH every subframe in order to detect uplink radio resource allocation information addressed to the local station apparatus in a section from timing T13 to timing T14. 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.

In addition, the base station apparatus 2 gives an additional parameter to the mobile station apparatus 1 to monitor the PDCCH in some subframes instead of every subframe in the interval from the activation of the PDCCH monitoring timer to the expiration. It may be set. For example, the PDCCH may be monitored only in even-numbered subframes, odd-numbered subframes, or some set subframes in which the PDCCH monitoring timer is operating. 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. For example, it may be set from the subframe number that transmitted the SR-PUCCH, or may be set from the index number used for setting the SR-PUCCH. Hereinafter, the time parameter applied to the PDCCH monitoring timer, that is, the parameter for specifying the continuous monitoring time P02 will be described as the PDCCH monitoring timer setting.

Here, the PDCCH monitoring timer setting may be individually set in the mobile station apparatus 1 by the base station apparatus 2 as part of the SR-PUCCH setting. That is, different PDCCH monitoring timer settings may be notified for each mobile station apparatus 1. Further, there may be a mobile station apparatus 1 that is not notified of the PDCCH monitoring timer setting.

Or, when the base station device 2 is notified of a value greater than or equal to a predetermined value as a transmission cycle timer (Periodic Timer) equal to the SR-PUCCH transmission cycle (SR Period), the mobile station device 1 is implicit (autonomous ) May be applied with the PDCCH monitoring timer setting defined in the system. For example, when 80 ms (milliseconds) is set as the SR-PUCCH transmission cycle timer, the mobile station apparatus 1 does not apply the PDCCH monitoring timer setting, and the SR-PUCCH transmission cycle timer exceeds 80 ms ( For example, when 160 ms) is set, the PDCCH monitoring timer setting may be applied.

Alternatively, when a value equal to or greater than a predetermined value is notified from the base station apparatus 2 as the SR-PUCCH transmission period timer (Periodic Timer), the mobile station apparatus sets the PDCCH monitoring timer setting from the SR-PUCCH transmission period timer value. 1 may be calculated implicitly (autonomously) and applied. Here, the calculated value may be a value obtained by reducing the SR-PUCCH transmission cycle timer to 1 / n (n is a non-zero natural number). Further, the coefficient n used for the calculation may be notified from the base station apparatus 2 or may be a fixed numerical value defined by the system. For example, when 80 ms (milliseconds) is set as the SR-PUCCH transmission cycle timer, the mobile station apparatus 1 does not apply the PDCCH monitoring timer setting, and the SR-PUCCH transmission cycle timer exceeds 80 ms ( For example, when 160 ms) is set, a value reduced to 1 / n (20 ms when n is 4) may be applied as the PDCCH monitoring timer setting.

Alternatively, the PDCCH monitoring timer setting may be information that specifies whether to activate the PDCCH monitoring timer. The PDCCH monitoring timer setting for activation may be applied based on any of the methods described above.

Returning to FIG. 3, when the radio resource allocation (uplink grant (UL grant)) by the physical downlink control channel PDCCH is not received from the base station apparatus 2 in the section of the continuous monitoring time P02, the mobile station apparatus 1 The monitoring of the PDCCH may not be performed from T14 to timing T15, which is the next SR-PUCCH transmission opportunity. The timing T15, which is an SR-PUCCH transmission opportunity, is equal to the timing at which the SR-PUCCH transmission period (SR Period) has elapsed from the SR-PUCCH (SR11) transmitted immediately before by the mobile station apparatus 1.

By configuring in this way, 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 period (SR Period) is longer, the use efficiency of radio resources and the effect of suppressing power consumption increase.

Subsequently, mobile station apparatus 1 transmits SR-PUCCH (SR12) at timing T15, which is the SR-PUCCH transmission period (SR Period). At this time, the mobile station device 1 increments the counter of the number of SR transmissions. In addition, the mobile station apparatus 1 starts the PDCCH monitoring 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 in the section from the timing T15 to the timing T17. This also applies to the intervals after and.

If a special connection procedure such as a handover or a radio link failure does not occur, the mobile station apparatus 1 will continue until the SR-PUCCH continuous transmission count reaches the maximum transmission count or from the base station apparatus 2 to the local station apparatus. On the other hand, the same reception control is repeated until the uplink grant (UL grant) transmitted is detected.

In FIG. 3, the mobile station apparatus 1 transmits an uplink grant (UL) addressed to the own station apparatus from the base station apparatus 2 at the timing R11 in the section of the continuous monitoring time P02 corresponding to the SR-PUCCH (SR13) transmitted at the timing T17. An example in the case of detecting (grant) is shown. That is, the timing R11 at which the base station device 2 transmits the uplink grant to the mobile station device 1 is within the interval of the PDCCH monitoring timer applied to the mobile station device 1. At this time, the mobile station apparatus 1 changes the SR state from the Pending state to the Non-Pending state, further stops the PDCCH monitoring timer, and applies normal reception control in which the PDCCH is monitored every subframe (PDCCH monitoring). Status: ON). Note that the mobile station apparatus 1 may release the PDCCH monitoring timer or may determine that it has expired.

The mobile station apparatus 1 of the present embodiment can explicitly or implicitly set a timer for measuring a predetermined time after transmitting a physical uplink control channel for a radio resource request from the base station apparatus 2. In addition, the mobile station apparatus 1 can regard the sections other than the section in which the timer is counting as sections in which the physical downlink control channel need not be monitored.

In addition, the base station apparatus 2 according to the present embodiment explicitly or implicitly sets a timer for measuring a predetermined time after transmitting a physical uplink control channel for requesting radio resources to the mobile station apparatus 1. Parameters can be notified. Further, the base station apparatus 2 does not have to transmit a physical downlink control channel to the mobile station apparatus 1 except in a section where the timer is counting.

Thus, according to the first embodiment, the mobile station apparatus 1 is configured to request a radio resource based on the setting of the physical uplink control channel for the radio resource request notified from the base station apparatus 2. After transmitting the physical 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 is reduced while improving the utilization efficiency of radio resources. be able to.

<Second Embodiment>
A second embodiment of the present invention will be described below. In the first embodiment, an example in which the mobile station apparatus 1 starts the PDCCH monitoring timer after transmitting the SR-PUCCH has been disclosed. However, in the present embodiment, a method capable of setting the timing for starting the PDCCH monitoring timer to an arbitrary timing It discloses about. The configurations of the mobile station device 1 and the base station device 2 used in the present embodiment may be the same as those shown in FIGS.

FIG. 4 is a diagram illustrating the exchange of information related to transmission / reception control between the mobile station device 1 and the base station device 2 in the present embodiment, and the way of viewing the diagram is the same as FIG. Further, DRX / DTX control is applied to the mobile station apparatus 1.

The transmission / reception control of the mobile station apparatus 1 from the timing T21 to the timing T22 is the same as the transmission / reception control of the mobile station apparatus 1 in the section from the timing T11 to the timing T12 in FIG.

Subsequently, transmission / reception control of the mobile station apparatus 1 from timing T22 to timing T26 will be described. 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. In other words, in 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. This is transmission / reception control that is applied when the uplink radio resource request control unit 110 determines that there is one.

When the transmission data is generated at timing T22, the SR state of the mobile station device 1 is changed to the Pending state. As in FIG. 3, the SR state of the mobile station apparatus 1 before the timing T22 is managed as a Non-Pending state. The mobile station apparatus 1 whose SR state has changed to the Pending state transmits SR-PUCCH (SR21) at the latest timing T23 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 T23) based on the SR-PUCCH transmission setting. Further, the mobile station apparatus 1 applies the offset value P03 until the PDCCH monitoring timer is started simultaneously with the transmission of the SR-PUCCH (SR21). Here, the actual PDCCH monitoring timer is started at timing T24 when the offset value P03 is applied. That is, the offset value is used to adjust the timing for starting the PDCCH monitoring timer. The continuous monitoring time P04 set by the base station apparatus 2 is applied to the PDCCH monitoring timer. The mobile station apparatus 1 does not have to monitor the PDCCH in a section until the PDCCH monitoring timer to which the offset value is applied, that is, a section from timing T23 to timing T24.

The mobile station apparatus 1 monitors the PDCCH every subframe during the continuous monitoring time P04 from when the PDCCH monitoring timer starts until it expires, that is, from timing T24 to timing T25 (PDCCH monitoring state: ON). As a method for setting a time parameter (PDCCH monitoring timer setting) applied to the PDCCH monitoring timer, any method described in the first embodiment may be used.

In addition, the base station apparatus 2 gives an additional parameter to the mobile station apparatus 1 to monitor the PDCCH in some subframes instead of every subframe in the interval from the activation of the PDCCH monitoring timer to the expiration. It may be set. For example, the PDCCH may be monitored only in even-numbered subframes, odd-numbered subframes, or some set subframes in which the PDCCH monitoring timer is operating. 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. For example, it may be set from the subframe number that transmitted the SR-PUCCH, or may be set from the index number used for setting the SR-PUCCH. Hereinafter, the offset value P03 until the PDCCH monitoring timer is started is referred to as a PDCCH monitoring offset value, and a method for setting the PDCCH monitoring offset value will be described.

Here, the PDCCH monitoring offset value may be individually notified to the mobile station apparatus 1 and set as part of the SR-PUCCH setting by the base station apparatus 2. That is, a different PDCCH monitoring offset value may be notified for each mobile station apparatus 1. Further, there may be a mobile station apparatus 1 that is not notified of the PDCCH monitoring offset value. Further, an index number for selecting one of a plurality of PDCCH monitoring offset values may be notified, and the index number may be fixedly set in the system or may be set individually for each mobile station apparatus 1.

Or, when the base station device 2 is notified of a value greater than or equal to a predetermined value as a transmission cycle timer (Periodic Timer) equal to the SR-PUCCH transmission cycle (SR Period), the mobile station device 1 is implicit (autonomous ) May be applied with a PDCCH monitoring offset value defined in the system. For example, when 80 ms (milliseconds) is set as the SR-PUCCH transmission cycle timer, the mobile station device 1 does not apply the PDCCH monitoring offset value, and the SR-PUCCH transmission cycle timer exceeds 80 ms ( For example, when 160 ms) is set, the PDCCH monitoring offset value may be applied.

Alternatively, when a value equal to or greater than a predetermined value is notified from the base station apparatus 2 as the SR-PUCCH transmission period timer (Periodic Timer), the mobile station apparatus sets the PDCCH monitoring offset value from the SR-PUCCH transmission period timer value. 1 may be calculated implicitly (autonomously) and applied. Here, the calculated value may be a value obtained by reducing the SR-PUCCH transmission cycle timer to 1 / n (n is a non-zero natural number). Further, the coefficient n used for the calculation may be notified from the base station apparatus 2 or may be a fixed numerical value defined by the system. For example, when 80 ms (milliseconds) is set as the SR-PUCCH transmission cycle timer, the mobile station device 1 does not apply the PDCCH monitoring offset value, and the SR-PUCCH transmission cycle timer exceeds 80 ms ( For example, when 160 ms) is set, a 1 / n value (20 ms when n is 4) may be applied as the PDCCH monitoring offset value.

Alternatively, the PDCCH monitoring offset value may be information that specifies whether or not to set the PDCCH monitoring offset value. The PDCCH monitoring offset value in the case of setting may be applied based on any of the methods described above.

Also, the PDCCH monitoring offset value may be set as a timer.

Returning to FIG. 4, when radio resource allocation (uplink grant (UL grant)) by the physical PDCCH is not detected from the base station apparatus 2 in the section of the continuous monitoring time P04, the mobile station apparatus 1 It is not necessary to monitor the PDCCH until timing T26, which is an SR-PUCCH transmission opportunity. The timing T26, which is an SR-PUCCH transmission opportunity, is equal to the timing at which the SR-PUCCH transmission period (SR Period) has elapsed from the SR-PUCCH (SR21) transmitted immediately before by the mobile station apparatus 1.

By configuring in this way, the mobile station apparatus 1 sets sections (sections from timing T23 to timing T24 and sections from timing T25 to timing T26) that do not require monitoring of the physical downlink control channel PDCCH. Therefore, it is possible to suppress power consumption used for monitoring the PDCCH in the section. In particular, as the SR-PUCCH transmission period (SR Period) is longer, the use efficiency of radio resources and the effect of suppressing power consumption increase.

Subsequently, the mobile station apparatus 1 transmits SR-PUCCH (SR22) at timing T26, which is the SR-PUCCH transmission period (SR Period). At this time, the mobile station device 1 increments the counter of the number of SR transmissions. Further, the mobile station apparatus 1 applies the offset value P03 until the PDCCH monitoring timer is started simultaneously with the transmission of the SR-PUCCH (SR22), and the same reception control described in the section from the timing T23 to the timing T26 regarding the PDCCH monitoring. Is also applied to the section from the timing T26 to the timing T28 and the subsequent sections.

If a special connection procedure such as a handover or a radio link failure does not occur, the mobile station apparatus 1 will receive an uplink transmitted from the base station apparatus 2 until the SR-PUCCH continuous transmission count reaches the maximum transmission count. The same reception control is repeated until a link grant (UL grant) is detected.

The operation after the mobile station apparatus 1 detects the uplink grant (UL grant) transmitted from the base station apparatus 2 may be the same as in the first embodiment. That is, the mobile station apparatus 1 that has detected the uplink grant (UL grant) transmitted from the base station apparatus 2 changes the SR state from the Pending state to the Non-Pending state, further stops the PDCCH monitoring timer, and the PDCCH Normal reception control in which subframes are monitored every subframe is applied (PDCCH monitoring state: ON). Note that the mobile station apparatus 1 may release the PDCCH monitoring timer or may determine that it has expired.

The mobile station apparatus 1 of the present embodiment may explicitly or implicitly set a timer for measuring a predetermined time after transmitting a physical uplink control channel for a radio resource request and applying an offset value. it can. In addition, the mobile station apparatus 1 can regard the sections other than the section in which the timer is counting as sections in which the physical downlink control channel need not be monitored.

In addition, the base station apparatus 2 of the present embodiment clearly indicates a timer for measuring a predetermined time after transmitting a physical uplink control channel for requesting radio resources to the mobile station apparatus 1 and applying an offset value. It is possible to notify and set parameters for setting automatically or implicitly. Further, the base station apparatus 2 does not have to transmit the downlink control channel to the mobile station apparatus 1 except for the section in which the timer is counting.

As described above, according to the second embodiment, the mobile station apparatus 1 performs the radio resource request based on the setting of the physical uplink control channel for the radio resource request notified from the base station apparatus 2. Since a section in which the physical downlink control channel is not monitored can be set based on the offset value and the timer after transmitting the physical uplink control channel, the power consumption of the mobile station apparatus 1 can be reduced while improving the utilization efficiency of radio resources. Can be reduced.

Note that the embodiment described above is merely an example, and can be realized by using various modifications and replacement examples. For example, 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. In addition, as the downlink measurement value, path loss or other measurement values (SIR, SINR, RSRP, RSRQ, RSSI, BLER) may be used instead, or a combination of these measurement values may be used. Is also possible. Further, the names of the parameters shown in the embodiments are called for convenience of explanation, and even if the parameter names actually applied and the parameter names of the embodiments of the present invention are different, the present invention It does not affect the gist of the invention claimed in the embodiment.

Further, 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). .

Further, for convenience of explanation, 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.

Then, 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 mobile station apparatus 1 or The base station apparatus 2 may be controlled. Here, the “computer system” includes an OS and hardware such as peripheral devices.

The operation described in each embodiment of the present invention may be realized by a program. 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. 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. In addition, 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. Furthermore, 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.

In addition, 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.

In addition, 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. Implemented by a 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 combinations thereof Or it can be implemented. 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.

As described above, the embodiments of the present invention have been described in detail on the basis of specific specific examples. However, it is obvious that the gist and claims of each embodiment of the present invention are not limited to these specific examples. In other words, the description in the present specification is for illustrative purposes and does not limit the embodiments of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Mobile station apparatus 2 ... Base station apparatus 101, 201 ... Reception part 102, 202 ... Demodulation part 103, 203 ... Decoding part 104 ... Measurement processing part 105, 204 ... Control part 106 ... Uplink buffer control part 107, 205 ... Encoding unit 108, 206 ... Modulation unit 109, 207 ... Transmission unit 110 ... Uplink radio resource request control unit 111 ... Random access control unit 112, 208 ... Upper layer 209 ... Network signal transmission / reception unit

Claims (11)

1. A terminal device in a communication system comprising a terminal device and a base station device,
   Start a monitoring timer for monitoring signal information used for allocation of uplink radio resources after transmitting an uplink radio resource request to the base station device,
   While the monitoring timer is operating, it monitors the signal information used for the allocation of the uplink radio resource,
   After the monitoring timer expires, the terminal apparatus does not monitor the signal information used for the allocation of the uplink radio resource until the next uplink radio resource request is transmitted.
2. The terminal device according to claim 1, wherein an offset value used for adjusting an activation time of the monitoring timer is applied to the monitoring timer.
3. The terminal apparatus according to claim 1, wherein the monitoring timer is stopped when signal information used for allocation of the uplink radio resource is detected.
4. A base station device in a communication system comprising a terminal device and a base station device,
   When the uplink radio resource request is transmitted to the base station apparatus, the terminal apparatus is notified of a monitoring timer for monitoring signal information used for uplink radio resource allocation applied to the terminal apparatus. A base station apparatus.
5. The base station apparatus according to claim 4, wherein the base station apparatus notifies the terminal apparatus of an offset value used for adjusting an activation time of the monitoring timer.
6. A communication system comprising a terminal device and a base station device,
   The base station apparatus notifies the terminal apparatus of a monitoring timer for monitoring signal information used for uplink radio resource allocation, which is applied when an uplink radio resource request is transmitted to the base station apparatus. ,
   The terminal apparatus starts the monitoring timer after transmitting the uplink radio resource request to the base station apparatus, and monitors signal information used for allocation of the uplink radio resource while the monitoring timer is operating, After the monitoring timer expires, the communication system does not monitor signal information used for allocation of the uplink radio resource until the next uplink radio resource request is transmitted.
7. The communication system according to claim 6, wherein the base station apparatus notifies the terminal apparatus of an offset value used for adjusting an activation time of the monitoring timer.
8. The communication system according to claim 6, wherein the terminal device stops the monitoring timer when detecting signal information used for allocation of the uplink radio resource.
9. A radio resource request method for a terminal device in a communication system comprising a terminal device and a base station device,
   Starting a monitoring timer for monitoring signal information used for uplink radio resource assignment after transmitting an uplink radio resource request to the base station device;
   Monitoring the signaling information used for the allocation of the uplink radio resources while the monitoring timer is in operation;
   A radio resource request method comprising: at least a step of not monitoring signal information used for allocation of the uplink radio resource until the next uplink radio resource request is transmitted after the monitoring timer expires.
10. An integrated circuit mounted on a terminal device in a communication system including a terminal device and a base station device,
    A function of starting a monitoring timer for monitoring signal information used for allocation of uplink radio resources after transmitting an uplink radio resource request to the base station device;
    While the monitoring timer is operating, a function of monitoring signal information used for allocation of the uplink radio resource;
    After the monitoring timer expires, the terminal device is caused to perform a series of functions including a function of not monitoring signal information used for allocation of the uplink radio resource until the next uplink radio resource request is transmitted. An integrated circuit characterized by that.
11. An integrated circuit mounted on a base station device in a communication system comprising a terminal device and a base station device,
    When the uplink radio resource request is transmitted to the base station apparatus, the terminal apparatus is notified of a monitoring timer that is applied to the terminal apparatus for monitoring signal information used for uplink radio resource allocation. An integrated circuit characterized by causing the base station apparatus to exhibit a series of functions.

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