JP5695167B2 - Mobile station apparatus, base station apparatus and processing method - Google Patents

Description

  The present invention relates to a communication system, a mobile station apparatus, a base station apparatus, an uplink transmission method, and an integrated circuit, and more particularly to an uplink transmission method when the mobile station apparatus receives a plurality of frequency bands simultaneously.

  Evolved which realized high-speed communication by adopting OFDM (Orthogonal Frequency-Division Multiplexing) communication method and flexible scheduling of predetermined frequency and time unit called resource block in 3GPP (3rd Generation Partnership Project) which is a standardization project The study of Universal Terrestrial Radio Access (hereinafter referred to as EUTRA) is underway. In EUTRA, a mobile station apparatus requests radio resource allocation information (uplink grant) indicating transmission permission of an uplink shared channel for transmitting uplink data to the base station apparatus by making a radio resource request (scheduling request). To do. The radio resource request is made using an uplink control channel or a random access channel individually assigned to the mobile station apparatus (detailed description of each channel will be described later).

  In Non-Patent Document 1, since a radio resource request using an uplink control channel takes time until data transmission, a base station apparatus is newly provided for a mobile station apparatus whose uplink transmission timing has been adjusted. An uplink radio resource common between mobile station apparatuses is allocated by an uplink grant, and a mobile station apparatus having data to transmit transmits uplink data by using an uplink radio resource common between mobile station apparatuses. There has been proposed a collision-type data transmission method for reducing the delay time required for transmission. The uplink radio resource in this case is also called a collision type (competitive type) radio resource.

  In 3GPP, discussion of Advanced EUTRA that realizes higher-speed data transmission and has upward compatibility with EUTRA has started. As a technology in Advanced EUTRA, carrier aggregation has been proposed. Carrier aggregation is a technique for improving a data rate by using a plurality of different frequency bands (also referred to as component carriers) in an aggregated manner. Further, it has been proposed that a mobile station apparatus communicating with a base station apparatus using carrier aggregation has a plurality of uplink transmission timings (Timing Advance) for each frequency or each component carrier (Non-patent Document 2). ).

R2-093812, Ericsson, ST-Ericsson, 3GPP TSG-RAN WG2 # 66bis, 29 June-03 July, 2009, Los Angeles, USA R2-101567, NTT DOCOMO, 3GPP TSG-RAN WG2 # 69, 22-26 February 2010, San Francisco, USA

  However, when the uplink collision-type data transmission method proposed in Non-Patent Document 1 is applied to a mobile station apparatus that is performing communication using a plurality of frequency bands (multi-carriers) like carrier aggregation. There has been no detailed study. In particular, when the mobile station apparatus needs to manage a plurality of uplink transmission timings during carrier aggregation, when radio resources for uplink transmission data are not allocated, the reception state of the mobile station apparatus Although it is necessary to select an optimal uplink transmission method according to the allocation state of the physical channel, there is a problem that it is not determined how to select the optimal uplink transmission method. In particular, the mobile station device has not yet solved whether to give priority to radio resource request or collision type data transmission through a random access channel in a plurality of uplink frequency bands, and optimal uplink transmission cannot be performed. There is a problem.

  The present invention has been made in view of such circumstances, and in the case where a mobile station apparatus connectable to a base station apparatus using a plurality of frequency bands performs uplink transmission, the plurality of frequency bands and the uplink are provided. An object of the present invention is to provide a mobile station device, a base station device, a communication system, a communication method, an integrated circuit, and a control program for the mobile station device that can perform uplink transmission by selecting an optimum transmission method combination. And

(1) In order to achieve the above object, the present invention takes the following measures. That is, the mobile station apparatus of the present invention is a mobile station apparatus connected to the base station apparatus using a plurality of cells,
The first information and the second information transmitted from the base station apparatus to the mobile station apparatus using the RRC message are received, and based on the first information and the second information, A first cell is selected from the cells, and an uplink radio resource required for uplink data transmission is requested in the first cell.

  (2) A base station apparatus according to the present invention is a base station apparatus connected to a mobile station apparatus using a plurality of cells, and transmits uplink data from the plurality of cells to the mobile station apparatus. Transmitting first information and second information used for selecting a first cell used for requesting a required uplink radio resource to each mobile station apparatus using an RRC message. And

  (3) Moreover, the processing method in the mobile station apparatus of this invention is a processing method in the mobile station apparatus connected to a base station apparatus using a some cell, Comprising: From the said base station apparatus using the RRC message, the said movement Receiving first information and second information transmitted for each station device, and selecting a first cell from the plurality of cells based on the first information and the second information; It is characterized by requesting uplink radio resources necessary for uplink data transmission in one cell.

  (4) Moreover, the processing apparatus in this invention is a processing apparatus mounted in the mobile station apparatus connected to a base station apparatus using a some cell, Comprising: From the said base station apparatus using the said RRC message, the said mobile station Receiving first information and second information transmitted for each device, and selecting a first cell from the plurality of cells based on the first information and the second information; In this cell, the mobile station apparatus is caused to execute a processing method for requesting uplink radio resources necessary for uplink data transmission.

  (5) Moreover, the base station apparatus of this invention is a processing method in the base station apparatus connected with a mobile station apparatus using a some cell, Comprising: Uplink data from the said several cell with respect to the said mobile station apparatus 1st information and 2nd information used in order to select the 1st cell used for the request | requirement of the uplink radio | wireless resource required for transmission of every mobile station apparatus using an RRC message It is characterized by that.

  (6) Moreover, the processing apparatus of this invention is a processing apparatus mounted in the base station apparatus connected to a mobile station apparatus using a some cell, Comprising: It is an uplink from the said several cell with respect to the said mobile station apparatus. First information and second information used for selecting a first cell used for requesting uplink radio resources necessary for data transmission are transmitted for each mobile station apparatus using an RRC message. The base station apparatus is caused to execute the processing method to be performed.

  According to the present invention, when a mobile station apparatus connectable to a base station apparatus using a plurality of frequency bands performs uplink transmission, an optimum one is selected from a combination of a plurality of frequency bands and an uplink transmission method. Thus, uplink transmission can be performed.

It is a block diagram which shows schematic structure of the mobile station apparatus which concerns on this invention. It is a block diagram which shows schematic structure of the base station apparatus which concerns on this invention. It is the figure which showed the example of the structure of the component carrier set to the mobile station apparatus 1 in which carrier aggregation is possible in this invention, and the physical channel setting of an uplink. It is a figure for demonstrating the method of the uplink transmission of the mobile station apparatus 1 which concerns on the 1st Embodiment of this invention. It is the flowchart shown about the example of the selection process of the uplink component carrier of the mobile station apparatus 1 which concerns on the 1st Embodiment of this invention. It is the flowchart shown about the example of the selection process of the uplink transmission method of the mobile station apparatus 1 which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the component carrier selection process which concerns on the 2nd Embodiment of this invention. It is the flowchart shown about the example of the reselection process of the uplink component carrier of the mobile station apparatus 1 which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating the method of the uplink transmission of the mobile station apparatus 1 which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the communication network structure which concerns on embodiment of this invention. When the mobile station apparatus 1 which concerns on embodiment of this invention performs a carrier aggregation, an example of the correspondence of the downlink component carrier which the base station apparatus 2 sets with respect to the mobile station apparatus 1, and an uplink component carrier FIG.

  In the communication system according to the present embodiment, a base station apparatus and a mobile station apparatus are connected by aggregating a plurality of frequency bands, and the mobile station apparatus makes an uplink radio resource request to the base station apparatus. A communication system using a random access channel, wherein the base station apparatus allocates a plurality of random access channel transmission settings applied to at least one uplink frequency band to the mobile station apparatus, and the mobile station apparatus When requesting the uplink radio resource necessary for uplink data transmission to the base station apparatus, the uplink frequency band for performing the radio resource request using the random access channel is based on the first condition. A radio resource request by a random access channel, or a common uplink link between the mobile station apparatuses. And selecting based on either the uplink transmission method for uplink transmission by the radio resource to the second condition.

  The present specification discloses the present invention in terms of improvement of a mobile station device, a base station device, a communication system, and a radio resource allocation method when the mobile station device and the base station device are connected using a plurality of frequency bands. However, the communication method to which the present invention is applicable is not limited to a communication method that is upward compatible with EUTRA, such as EUTRA or Advanced EUTRA.

  First, the carrier aggregation, the physical channel, and the uplink transmission method according to this embodiment will be briefly described.

(1) Carrier aggregation Carrier aggregation is a technology that aggregates (aggregates) a plurality of different uplink or downlink frequency bands (component carriers) and treats them as one frequency band. For example, when five component carriers having a frequency bandwidth of 20 MHz are aggregated by carrier aggregation, the mobile station apparatus can access the mobile station apparatus by regarding it as a frequency bandwidth of 100 MHz. The component carriers to be aggregated may be a continuous frequency band, or may be a frequency band in which all or part of them are discontinuous. For example, when the usable frequency band is the 800 MHz band, the 2.4 GHz band, and the 3.4 GHz band, one component carrier is the 800 MHz band, another component carrier is the 2 GHz band, and another component carrier is 3.4 GHz. It may be transmitted in a band.

  It is also possible to aggregate continuous or discontinuous component carriers in the same frequency band, for example, the 2.4 GHz band. The frequency bandwidth of each component carrier may be a frequency bandwidth narrower than 20 MHz, and the frequency bandwidth may be different from each other. The base station apparatus determines the number of uplink or downlink component carriers to be allocated to the mobile station apparatus based on various factors such as the amount of retained data buffer, the reception quality of the mobile station apparatus, the load in the cell, and QoS. Can be increased or decreased.

(2) Physical channel The main physical channel (or physical signal) used in EUTRA and Advanced EUTRA will be described. The physical channel may be added or changed in the future in EUTRA and Advanced EUTRA. However, even if the physical channel is changed, the description of each embodiment of the present invention is not affected. Synchronization signals are composed of three types of primary synchronization signals and secondary synchronization signals composed of 31 types of codes arranged alternately in the frequency domain. By the combination, 504 kinds of cell identifiers (Cell ID: PCI) for identifying base station apparatuses and frame timing for radio synchronization are shown. The mobile station device specifies the cell ID of the synchronization signal received by the cell search.

  A physical broadcast information channel (PBCH; Physical Broadcast Channel) is transmitted for the purpose of notifying control parameters (broadcast information (system information): System information) commonly used by mobile station apparatuses in a cell. Broadcast information that is not notified on the physical broadcast information channel is transmitted as a layer 3 message (system information) on the downlink shared channel after the radio resource is notified on the downlink control channel. As broadcast information, a cell global identifier (CGI) indicating an individual cell identifier, a tracking area identifier (TAI) for managing a standby area by paging, and the like are notified.

  The downlink reference signal is a pilot signal transmitted at a predetermined power for each cell. The downlink reference signal is a known signal that is periodically repeated at a frequency / time position based on a predetermined rule. The mobile station apparatus measures the reception quality for each cell by receiving the downlink reference signal. Also, the mobile station apparatus uses the downlink reference signal as a reference signal for demodulating the downlink control channel or the downlink shared channel transmitted simultaneously with the downlink reference signal. As a sequence used for the downlink reference signal, a sequence that can be identified for each cell is used. In addition, although a downlink reference signal may be described as cell-specific reference signal (RS), the use and meaning are the same.

  A downlink control channel (PDCCH; Physical Downlink Control Channel) is transmitted in several OFDM symbols from the beginning of each subframe. Radio resource allocation information according to scheduling of the base station apparatus and transmission to the mobile station apparatus Used to indicate the amount of power increase / decrease adjustment. The mobile station apparatus monitors (monitors) the downlink control channel addressed to itself before transmitting / receiving the layer 3 message (paging, handover command, etc.) that is downlink data or downlink control data, and By receiving the 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 at the time of reception from the downlink control channel.

  The uplink control channel (PUCCH: Physical Uplink Control Channel) is a reception acknowledgment for data transmitted on the downlink shared channel, downlink channel information (CQI: Channel Quality Indicator), and scheduling that is an uplink radio resource request. Used to make a request (SR: SchedulingRequest). A downlink shared channel (PDSCH) is used to notify paging and broadcast information as a layer 3 message that is downlink control data in addition to downlink data. The radio resource allocation information of the downlink shared channel is indicated by the downlink control channel. An 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. Similarly to the downlink, the radio resource allocation information of the uplink shared channel is indicated by the downlink control channel.

  A random access channel (PRACH) is a channel used for notifying a preamble sequence and has a guard time. The 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 an 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 random access channel is used to request the base station apparatus. The mobile station apparatus that has received the transmission timing adjustment information sets the effective time (TA timer) of the transmission timing adjustment information, and manages the state as a transmission timing adjustment state during the effective time and a transmission timing non-adjustment state outside the effective period. To do. The base station device can also start random access by assigning a dedicated preamble sequence (Dedicated preamble) to the mobile station device. Since other physical channels are not related to each embodiment of the present invention, detailed description thereof is omitted.

(3) Uplink transmission method In EUTRA, the following three methods are prepared as a method for a mobile station apparatus to start transmission of uplink data to a base station apparatus. In the first method, when the base station apparatus allocates resources (transmission setting (configuration)) of an uplink control channel necessary for making a radio resource request to the mobile station apparatus, the mobile station apparatus In this method, a radio resource request (request for uplink grant transmission) is made to a base station apparatus using an uplink control channel. When the mobile station apparatus cannot receive the uplink grant from the base station apparatus even when the maximum number of times of transmission of the uplink control channel is reached, the mobile station apparatus releases the resources of the uplink control channel. In the first method, the mobile station apparatus is in a transmission timing adjustment state.

  In the second method, the mobile station apparatus is in a transmission timing adjustment state, but the base station apparatus does not allocate an uplink control channel necessary for making a radio resource request to the mobile station apparatus, or TA timer. Is a method in which the mobile station apparatus makes a radio resource request to the base station apparatus using a random access channel when is inactive (transmission timing non-adjusted state). According to a third method, when a mobile station apparatus is in a transmission timing adjustment state and the base station apparatus allocates collision radio resources using a downlink control channel, the mobile station apparatus with data to transmit is a mobile station. In this method, uplink data is transmitted using a collision type radio resource common between apparatuses. The third method is different from the other methods in that the base station device indicates a radio resource for transmitting the uplink shared channel regardless of the request of the mobile station device.

[Example of communication network configuration of the present invention]
FIG. 10 is a diagram illustrating an example of a communication network configuration according to the embodiment of the present invention. When the mobile station apparatus 1 can be wirelessly connected to the base station apparatus 2 by simultaneously using a plurality of frequency bands (component carriers, Band1 to Band3) by carrier aggregation, the communication network configuration has one base The station apparatus 2 includes transmitting apparatuses 11 to 13 (and receiving apparatuses 21 to 23 (not shown)) for each of a plurality of frequency bands, and the configuration in which each frequency band is controlled by one base station apparatus 2 simplifies the control. From the viewpoint of However, the base station apparatus 2 may be configured to transmit a plurality of frequency bands with a single transmission apparatus, for example, because the plurality of frequency bands are continuous frequency bands. Furthermore, a configuration in which transmission / reception timing differs for each frequency band may be used. The communicable range of each frequency band controlled by the transmission apparatuses 11 to 13 of the base station apparatus 2 is regarded as a cell. At this time, the areas (cells) covered by each frequency band may have different sizes and shapes.

  However, in the description to be described later, each area covered by the frequency of the component carrier formed by the base station apparatus 2 is referred to as a cell, and this is the definition of a cell in a communication system that is actually operated. Note that it can be different. For example, in some communication systems, some of the component carriers used by carrier aggregation may be defined simply as additional radio resources rather than cells. By referring to the component carrier as a cell in the present invention, even if a case different from the definition of the cell in the actually operated communication system occurs, the gist of the present invention is not affected. The mobile station device 1 may be wirelessly connected to the base station device 2 via a relay station device (or repeater) for each frequency band. That is, the base station apparatus 2 of the present invention can be replaced with a relay station apparatus.

  Note that the third generation base station apparatus 2 defined by 3GPP is referred to as a Node B (NodeB), and the base station apparatus 2 in EUTRA and Advanced EUTRA is referred to as an eNodeB (eNodeB). The base station device 2 manages a cell that is an area where the mobile station device 1 can communicate, and the cell is also referred to as a femto cell, a pico cell, or a nano cell depending on the size of the area that can communicate with the mobile station device 1. When the mobile station device 1 can communicate with a certain base station device 2, the cell of the base station device 2 is a serving cell of the mobile station device 1, and the other cells are referred to as neighboring cells.

[Component carrier configuration setting example]
FIG. 11 shows the correspondence between the downlink component carrier set by the base station apparatus 2 for the mobile station apparatus 1 and the uplink component carrier when the mobile station apparatus 1 according to the embodiment of the present invention performs carrier aggregation. It is the figure which showed an example of the relationship. In FIG. 11, the downlink component carrier DL_CC1 and the uplink component carrier UL_CC1, and the downlink component carrier DL_CC2 and the uplink component carrier UL_CC2 are cell-specific connected (Cell Specific Linkage).

  The cell-specific connection is, for example, a correspondence relationship (linkage relationship) between uplink and downlink frequency bands accessible to the base station device 2 when the mobile station device 1 is not carrier-aggregated. The corresponding information is indicated for each component carrier by broadcast information. The relationship between uplink and downlink frequency bands is explicitly specified as frequency information in broadcast information, or is defined uniquely for each operating frequency when not explicitly indicated in broadcast information. It is implicitly instructed by using frequency difference information. In addition to these methods, other methods may be used as long as the correspondence relationship between uplink and downlink frequency bands can be shown for each cell. A plurality of component carriers may be connected to a single component carrier in a cell-specific manner.

  On the other hand, the base station apparatus 2 may individually set the correspondence relationship between the downlink component carrier and the uplink component carrier for each mobile station apparatus 1 separately from the cell-specific connection (individual connection; UE Specific Linkage). Is possible. A plurality of component carriers may be individually connected to one component carrier. Even when the base station apparatus 2 sets a plurality of UL_CCs in the mobile station apparatus 1, the base station apparatus 2 allocates an uplink control channel for making a scheduling request only to any one UL_CC. On the other hand, the base station apparatus 2 can also assign a plurality of random access channels for each UL_CC or for each frequency band. Considering 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 present invention, detailed descriptions of known functions and configurations related to the present invention will be omitted if it is determined that the gist of the present invention will be obscured.

<First Embodiment>
A first embodiment of the present invention will be described below. The present embodiment relates to an uplink transmission method at the time of carrier aggregation of the mobile station device 1, and in particular, a component carrier selection method and an uplink transmission method when the mobile station device 1 newly starts uplink transmission. The selection method will be described.

  FIG. 1 is a block diagram showing a schematic configuration of a mobile station apparatus 1 according to the present invention. The mobile station apparatus 1 includes a receiving unit 101, a demodulating unit 103, a decoding unit 105, a measurement processing unit 107, a random access control unit 109, a coding unit 111, a modulation unit 113, a transmission unit 115, a control unit 117, and an upper layer 119. Composed. The upper layer 119 includes RRC (Radio Resource Control) that performs radio resource control. The random access control unit 109 functions as part of a MAC (Medium Access Control) that manages the data link layer. Prior to reception, mobile station apparatus control information is input from the upper layer 119 to the control unit 117, and control information related to reception is appropriately input to the reception unit 101, the demodulation unit 103, and the decoding unit 105 as reception control information. The mobile station apparatus control information is set by the base station apparatus 2 and system parameters, and is input by the upper layer 119 as necessary. The reception control information includes information such as reception timing, multiplexing method, and radio resource arrangement information regarding each channel in addition to information on the reception frequency band.

  The reception signal is received by the reception unit 101. The receiving unit 101 receives a signal in the frequency band specified by the reception control information. The received signal is input to the demodulation unit 103. Demodulation section 103 demodulates the received signal, inputs the signal to decoding section 105 to correctly decode downlink data and downlink control data, and inputs each decoded data to higher layer 119. The measurement processing unit 107 measures the reception quality (SIR, SINR, RSRP, RSRQ, RSSI, path loss, etc.) of the downlink reference signal for each cell (component carrier) and the reception error of the downlink control channel or downlink shared channel. Based on the rate measurement result, downlink measurement information is generated, and the downlink measurement information is output to the upper layer 119.

  Prior to transmission, mobile station apparatus control information is input from the upper layer 119 to the control unit 117, and control information related to transmission is transmitted as control information, a random access control unit 109, a coding unit 111, a modulation unit 113, and a transmission unit 115. Is entered appropriately. The transmission control information includes information such as encoding information, modulation information, transmission frequency band information, transmission timing for each channel, multiplexing method, and radio resource arrangement information as uplink scheduling information of the transmission signal. The random access control information is input from the upper layer 119 to the random access control unit 109. The random access control information includes preamble information, radio resource information for random access channel transmission, and the like.

  The encoding unit 111 receives uplink data and uplink control data from the upper layer 119, and also receives random access data information related to transmission of the random access channel from the random access control unit 109. The encoding unit 111 appropriately encodes each data according to the transmission control information and outputs the data to the modulation unit 113. Modulation section 113 modulates the output from encoding section 111. The transmission unit 115 maps the output of the modulation unit 113 to the frequency domain, converts the frequency domain signal into a time domain signal, performs power amplification on a carrier wave of a predetermined frequency, and transmits the signal. An uplink shared channel in which uplink control data is arranged typically constitutes a layer 3 message (radio resource control message; RRC message). In FIG. 1, the other components of the mobile station apparatus 1 are omitted because they are not related to the present embodiment.

  FIG. 2 is a block diagram showing a schematic configuration of the base station apparatus 2 according to the present invention. The base station apparatus 2 includes a reception unit 201, a demodulation unit 203, a decoding unit 205, an upper layer 207, an encoding unit 209, a modulation unit 211, a transmission unit 213, a control unit 215, and a network signal transmission / reception unit 217. The upper layer 207 inputs the downlink data and the downlink control data to the encoding unit 209. The encoding unit 209 encodes the input data and inputs the encoded data to the modulation unit 211. The modulation unit 211 modulates the encoded signal. A signal output from the modulation unit 211 is input to the transmission unit 213. The transmitter 213 maps the input signal to the frequency domain, converts the frequency domain signal into a time domain signal, performs power amplification on a predetermined frequency carrier wave, and transmits the signal. A downlink shared channel in which downlink control data is arranged typically constitutes a layer 3 message (RRC message).

  In addition, the reception unit 201 converts a signal received from the mobile station apparatus 1 (a signal may be received via the relay station apparatus) into a baseband digital signal. The digital signal is input to the demodulation unit 203 and demodulated. The signal demodulated by the demodulating unit 203 is then input to the decoding unit 205 and decoded, and the uplink control data and uplink data decoded correctly are output to the upper layer 207. Base station apparatus control information necessary for control of each block is set by an upper network apparatus (MME or gateway apparatus) and system parameters, and the upper layer 207 inputs the control section 215 as necessary. The control unit 215 transmits the base station apparatus control information related to transmission to the blocks of the encoding unit 209, the modulation unit 211, and the transmission unit 213 as transmission control information, and the 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 203, and the decoding unit 205. The RRC of the base station device 2 exists as part of the upper layer 207.

  On the other hand, the network signal transmission / reception unit 217 transmits or receives control messages between the base station apparatuses 2 or between the network apparatus and the base station apparatus 2. In FIG. 2, the other components of the base station apparatus 2 are omitted because they are not related to the present invention. The network configuration of the communication system in which the mobile station apparatus 1 and the base station apparatus 2 are arranged can be the same as that shown in FIG.

  FIG. 3 is a diagram illustrating an example of the configuration of component carriers set in the mobile station apparatus 1 capable of carrier aggregation and an uplink physical channel setting in the present invention. In the example of FIG. 3, as the component carrier configuration, a component carrier that is cell-specifically connected with DL_CC1 and UL_CC1 and DL_CC2 and UL_CC2 as a pair is set for the mobile station apparatus 1. Also, activation of these component carriers is explicitly or implicitly instructed from the base station apparatus 2, and the mobile station apparatus 1 uses two frequency bands for downlink reception and uplink transmission, respectively. can do. When the component carrier is activated, the mobile station apparatus 1 needs to receive (monitor) at least one of the downlink control channel and the downlink shared channel transmitted by the component carrier. On the other hand, when the component carrier is deactivated, the mobile station apparatus 1 may not receive (monitor) both the downlink control channel and the downlink shared channel of the component carrier. The base station apparatus 2 preferably uses a MAC control element, which is MAC control information, for activating or deactivating component carriers.

  Further, as an uplink physical channel setting, an uplink control channel transmission setting (uplink control channel setting for radio resource request) used for a radio resource request is set only to UL_CC1. In addition, transmission settings (random access channel settings) of different random access channels are made in the uplink component carriers of UL_CC1 and UL_CC2. That is, the mobile station device 1 needs to manage the UL_CC1 and UL_CC2 transmission timing adjustment information, TA timer, transmission timing adjustment state / transmission timing non-adjustment state independently for each component carrier.

  Note that the scope of the present invention is not limited to the example of FIG. 3, and a plurality of uplink component carriers are set in the mobile station apparatus 1 as carrier aggregation, and a plurality of random access channel settings are set in different uplink component carriers. Applicable if set. For example, uplink and downlink component carriers set as a pair are not cell-specific and may be set individually for each mobile station device 1 by the base station device 2.

  FIG. 4 is a diagram for explaining a method of uplink transmission of the mobile station apparatus 1 according to the first embodiment of the present invention. The horizontal axis in FIG. 4 shows the passage of time. The uplink control channel transmission subframes (311 and 312), the random access transmission subframes (411 to 413 and 421 to 422), and the collision type uplink data transmission subframe 321 in FIG. The transmission timing (transmission resource) of the uplink transmission is shown. However, for simplification, the difference in frequency resources is omitted. One subframe is 1 ms time, and 10 subframes constitute one frame. The base station apparatus 2 assigns a transmission setting for the mobile station apparatus 1 to transmit a radio resource request uplink control channel using UL_CC1.

  In addition, the base station apparatus 2 is assigned transmission settings of random access channels for the mobile station apparatus 1 to transmit random access channels using UL_CC1 and UL_CC2. Also, TA timer # 1 in UL_CC1 is within the valid period, and UL_CC1 is in the transmission timing adjustment state. Similarly, TA timer # 2 in UL_CC2 is within the valid period, and UL_CC2 is in the transmission timing adjustment state.

  At this time, when uplink transmission data is newly generated in the mobile station apparatus 1, the mobile station apparatus 1 continuously requests a radio resource request until the uplink control channel transmission subframe valid period (uplink grant is received). In the period in which the number of transmissions of the uplink control channel transmitted for the purpose is less than the maximum number of transmissions), a radio resource request is made to the base station apparatus 2 using the allocated uplink control channel (311). However, if radio resources are not allocated from the base station apparatus 2 after transmitting the uplink control channel (311), the radio resource request is transmitted to the base station again using the uplink control channel (312) at the next transmission opportunity. This is performed for the station apparatus 2. In the example of FIG. 4, the mobile station apparatus 1 has an opportunity to transmit a random access channel in the UL_CC1 random access channel transmission subframe (411, 412) and the UL_CC2 random access channel transmission subframe (421). The wireless resource request by the random access channel is not performed.

  When the mobile station apparatus 1 reaches the maximum number of radio resource request transmissions using the uplink control channel by transmitting the next uplink control channel (312), the uplink control channel transmission subframe valid period ends. The transmission setting of the uplink control channel is released.

  Subsequently, the mobile station apparatus 1 needs to transmit a random access channel in order to make a radio resource request. Since the transmission setting of the random access channel is set to a plurality of uplink component carriers, It is necessary to determine whether it is optimal to transmit the random access channel on the carrier. The simplest method is to transmit the random access channel with the uplink component carrier that was transmitting the uplink control channel, but whether or not the transmission setting of the random access channel is set to the uplink component carrier Depending on the setting of the base station apparatus 2, an exceptional case must be taken into account, and the processing of the mobile station apparatus 1 becomes complicated, so another method is desirable. Therefore, in the first embodiment, a method for selecting the highest quality uplink component carrier from among a plurality of uplink component carriers will be described.

  After the end of the uplink control channel transmission subframe valid period (after the uplink control channel transmission subframe (312)), the mobile station apparatus 1 transmits uplink component carriers (UL_CC1 and UL_CC2) for which transmission settings for the random access channel are set. ) And the downlink component carrier (DL_CC1 and DL_CC2) paired with the downlink reference signal path loss is measured, and the uplink value paired with the downlink component carrier with the best measured path loss value (best reception quality) Select a link component carrier. Then, in the selected uplink component carrier, a radio resource request is made using a random access channel. Alternatively, one of the path loss values is randomly selected from the uplink component carriers paired with the downlink component carrier that is better than a predetermined value, or one is selected according to the priority specified by the base station apparatus 2.

  By using such an uplink component carrier selection method, the mobile station apparatus 1 can select a high-quality uplink component carrier based on the path loss value, thereby improving the success probability of a radio resource request. In addition, transmission power and transmission delay can be reduced at the same time. This method also has an advantage that the control of the mobile station apparatus 1 is simplified because only the path loss values are compared. Note that the uplink component carrier may not have a pair of downlink component carriers. That is, an uplink component carrier may be selected based on a value derived by calculation within the mobile station apparatus 1 by adding an offset value to a path loss value of a certain downlink component carrier.

  In FIG. 4, when UL_CC1 has better path loss quality than UL_CC2, and the mobile station apparatus 1 selects UL_CC1, a random access channel is transmitted in the latest random access transmission subframe (413) in UL_CC1. . However, when the collision type uplink data transmission subframe (321) is instructed from the base station apparatus 2 at a timing earlier than the random access transmission subframe (413), the mobile station apparatus 1 transmits the collision type uplink data transmission. It is further necessary to determine whether or not to perform uplink transmission in the subframe (321).

  At this time, the mobile station apparatus 1 detects the allocation of the collision type uplink data transmission subframe (321) in the uplink component carrier (UL_CC2) other than the selected uplink component carrier (UL_CC1), When the collision type uplink data transmission subframe (321) is earlier than the random access transmission subframe (413), it is determined whether or not a predetermined condition described below is satisfied. When the condition is satisfied, the mobile station apparatus 1 performs uplink transmission in the collision type uplink data transmission subframe (321), and when the condition is not satisfied, the mobile station apparatus 1 performs the collision type uplink data transmission subframe (321). ) Is not used for uplink transmission.

  The predetermined conditions are: (1) the path loss value of the downlink component carrier to be paired is better (or worse) than a predetermined threshold, and (2) the number of untransmitted uplink transmission data bits is greater than or equal to the specified value. (Or less than a specified value), (3) It is determined by one or a combination of the detected collision type uplink data transmission subframe to the random access transmission subframe over a specified time. These conditions may be specified for each cell in the broadcast information, or may be specified individually for each mobile station apparatus 1 from the base station apparatus 2 using an RRC message.

  On the other hand, when the mobile station apparatus 1 detects the allocation of the collision type uplink data transmission subframe on the same uplink component carrier as the uplink component carrier selected by the mobile station apparatus 1, the mobile station apparatus 1 precedes the random access transmission subframe. Uplink transmission is performed in the collision type uplink data transmission subframe.

  Further, when the collision type uplink data transmission subframe is allocated while waiting for a random access response (random access response) from the base station apparatus 2, the mobile station apparatus 1 is assigned to the allocated uplink component carrier. Regardless, uplink transmission is not performed in the collision type uplink data transmission subframe. When the mobile station apparatus 1 cannot receive the random access response from the base station apparatus 2 and is assigned a collision type uplink data transmission subframe while waiting for retransmission of the next random access, the allocated uplink data Regardless of the link component carrier, retransmission of random access is canceled, and uplink transmission is performed in the collision type uplink data transmission subframe. Note that the mobile station apparatus 1 may consider the above-described conditions when canceling retransmission of random access and performing uplink transmission in a collision-type uplink data transmission subframe. Also, when the mobile station apparatus 1 is performing random access with the dedicated preamble sequence allocated from the base station apparatus 2, the mobile station apparatus 1 gives priority to the random access retransmission process and performs uplink in the collision-type uplink data transmission subframe. Do not send.

  By selecting an uplink transmission method based on such conditions, it is possible to perform uplink transmission with little delay without degrading the quality of uplink transmission. In the present invention, the uplink component carrier selection condition for requesting uplink radio resources necessary for uplink data transmission, and the uplink radio resources common between the radio resource of the random access channel and the mobile station apparatus 1 The base station apparatus 2 may individually set the selection condition for which one to use for the mobile station apparatus 1.

  FIG. 5 is a flowchart illustrating an example of uplink component carrier selection processing of the mobile station apparatus 1 according to the first embodiment of the present invention. When the transmission setting of the uplink control channel used for the radio link request is released, the mobile station apparatus 1 selects the uplink component carrier that performs the radio resource request by the random access channel in the random access transmission component carrier selection. The selection method is as follows. The mobile station device 1 first determines whether or not a priority is designated from the base station device 2 (step S1). When the priority is designated (step S1: YES), the mobile station apparatus 1 selects one of the uplink component carriers according to the priority designated by the base station apparatus 2.

  When the priority is not specified from the base station (step S1: NO), the mobile station apparatus 1 is the uplink component carrier in which the transmission setting of the random access channel is set after the uplink control channel transmission subframe valid period ends. The path loss of the downlink reference signal of the downlink component carrier paired with is measured (step S3). Here, it is determined whether there is a predetermined value for evaluating the path loss value (step S4). If there is a predetermined value (step S4: YES), a path loss value is randomly selected from among uplink component carriers paired with a downlink component carrier that is better than the predetermined value (step S5).

  If there is no predetermined value (step S4: NO), an uplink component carrier paired with the downlink component carrier having the best measured path loss value (the best reception quality) is selected (step S6). In this way, one uplink component carrier that transmits the random access channel is selected, and the process is terminated. Note that the mobile station apparatus 1 can omit some of the steps described above according to the selection process of the component carrier to be actually used.

  FIG. 6 is a flowchart illustrating an example of the selection process of the uplink transmission method of the mobile station apparatus 1 according to the first embodiment of the present invention. The mobile station apparatus 1 has already selected an uplink component carrier that makes a radio resource request using a random access channel by the process of FIG. At this time, the mobile station apparatus 1 determines whether or not there is a collision type radio resource assignment before transmitting the random access channel (step S101). When collision type radio resource allocation is not detected (step S101: NO), random access transmission is selected (step S102). When collision type radio resource allocation is detected (step S101: YES), that is, when collision type radio resource allocation is detected in the uplink grant of the downlink control channel, the mobile station apparatus 1 determines the collision type radio resource. It is determined whether the allocation is for the same uplink component carrier as the selected uplink component carrier (step S103).

  And if it is the same uplink component carrier (step S103: YES), uplink transmission will be performed using collision type radio | wireless resources, without waiting for the radio | wireless resource request | requirement by a random access channel (step S104). On the other hand, if the allocation is to an uplink component carrier different from the selected uplink component carrier (step S103: NO), it is determined whether or not a predetermined condition is satisfied (step S105). Step S105: YES), uplink transmission is performed using the collision type radio resource (step S104). On the other hand, when the condition is not satisfied (step S105: NO), the mobile station waits until the transmission subframe of the random access channel without performing uplink transmission (step S102). Whether or not the predetermined condition is satisfied is determined by one or a plurality of combinations described above.

  Thus, in the first embodiment, when a plurality of uplink frequency bands (component carriers) are set, the mobile station apparatus 1 selects the optimum uplink component carrier and performs uplink transmission. be able to. Further, even when a plurality of methods can be selected for transmitting new transmission data, an optimal transmission method can be selected. The selection of the optimal uplink component carrier is preferably performed by the RRC of the mobile station apparatus 1 and instructed from the RRC to the MAC (random access control unit 109). Also, the base station apparatus 2 uses the broadcast information or the RRC message to determine the conditions used by the mobile station apparatus 1 for selecting the optimum uplink component carrier and the conditions used for selecting the transmission method for uplink transmission. 1 to send.

  As described above, when the uplink radio resource for transmitting uplink data is not allocated, the mobile station apparatus 1 uses the best uplink component carrier based on the reception quality of the paired downlink component carrier. Therefore, the success rate of the radio resource request can be improved, and transmission power reduction and transmission delay reduction can be realized at the same time. Moreover, the control process of the mobile station apparatus 1 can be simplified. In addition, when the mobile station device 1 can select one of the radio resource request and the collision type data transmission through the random access channel, the mobile station device 1 selects the transmission method based on a predetermined condition. Thus, it is possible to perform uplink transmission with little delay without degrading the quality of uplink transmission. The base station apparatus 2 can make the mobile station apparatus 1 select an optimal transmission method by notifying various information necessary for the mobile station apparatus 1 to perform optimal uplink transmission.

<Second Embodiment>
A second embodiment of the present invention will be described below. In the present embodiment, a method for selecting an uplink component carrier capable of transmitting a random access channel at the earliest timing after transmission becomes possible will be described. 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. Details of this embodiment will be described with reference to FIG. In FIG. 4, since the uplink control channel transmission subframe valid period ends and the transmission setting of the uplink control channel is released, the description is omitted because it is the same as that of the first embodiment.

  After the end of the uplink control channel transmission subframe valid period (after the uplink control channel transmission subframe (312)), the mobile station apparatus 1 has a plurality of uplink component carriers (UL_CC1) for which transmission settings for the random access channel are configured. And UL_CC2), the uplink component carrier that can transmit the random access channel earliest (that is, the random access transmission subframe is assigned earliest) is selected. By using such an uplink component carrier selection method, the mobile station apparatus 1 can transmit a random access channel at the fastest speed, so that the delay time until uplink transmission is actually started is reduced. It can be as short as possible.

  In FIG. 4, since the random access transmission subframe is assigned to UL_CC2 earlier than UL_CC1, mobile station apparatus 1 selects UL_CC2 and transmits the random access channel in the random access transmission subframe (422). . However, when the collision type uplink data transmission subframe (321) is instructed from the base station apparatus 2 at a timing earlier than the random access transmission subframe (422), the mobile station apparatus 1 transmits the collision type uplink data transmission. It is further necessary to determine whether or not to perform uplink transmission in the subframe (321). The method shown in the first embodiment can be used to determine whether or not the mobile station apparatus 1 transmits uplink data using a collision type radio resource.

  Further, when the transmission timings of the random access transmission subframes of different uplink component carriers are the same, the mobile station device 1 is optimal from the path loss value of the downlink component carrier paired with the number of bits of uplink data to be transmitted. Select one uplink component carrier. Specifically, when the number of bits of uplink data to be transmitted is equal to or greater than a predetermined number of bits, the mobile station apparatus 1 has the best uplink in which the path loss value of the downlink component carrier to be paired is equal to or greater than a predetermined threshold. Select a link component carrier. On the other hand, when the uplink data to be transmitted is less than the predetermined number of bits, the mobile station apparatus 1 selects the best uplink component carrier whose path loss value of the downlink component carrier to be paired is a predetermined threshold value or more. Alternatively, one uplink component carrier may be selected at random. FIG. 7 shows the uplink component carrier selection process of the mobile station apparatus 1 in the second embodiment.

  FIG. 7 is a flowchart showing component carrier selection processing according to the second embodiment of the present invention. The mobile station apparatus 1 first determines whether there is a random access transmission subframe with the same timing (step S201). When the timing is different (step S201: NO), an uplink component carrier capable of transmitting the random access channel earliest is selected (step S202).

  When the transmission timings of the random access transmission subframes of different uplink component carriers are the same (step S201: YES), the mobile station apparatus 1 passes the path loss of the downlink component carrier paired with the number of bits of uplink data to be transmitted. One optimal uplink component carrier is selected from the values of (Step S203). However, the random access transmission component carrier selection is selected based on the timing at which the random access channel can be transmitted. The selection process of the uplink transmission method of the mobile station apparatus 1 in the second embodiment may be the same as the flowchart shown in FIG.

  Further, in the present embodiment, the mobile station apparatus 1 is not receiving a response of the random access channel (random access response) transmitted by the selected uplink component carrier and waiting for retransmission of random access. A case where random access is performed by reselecting an uplink component carrier will be described. The mobile station apparatus 1 does not reselect another uplink component carrier while waiting for reception of a random access response. The case where the mobile station apparatus 1 changes the uplink component carrier for performing random access is effective when the frequency of allocation of random access transmission subframes is different as shown in FIG. That is, in the example of FIG. 4, after the mobile station apparatus 1 transmits the random access channel in the UL_CC2 random access transmission subframe (422), the next transmission opportunity is two frames later. However, if it is possible to transmit in the UL_CC1 random access transmission subframe (413) before the next UL_CC2 transmission opportunity, it is possible to reduce the time required to actually perform uplink transmission. .

  The mobile station apparatus 1 determines whether or not to switch the uplink component carrier that transmits the random access channel, the currently selected uplink component carrier (UL_CC2), and the uplink component carrier (UL_CC1) that is the switching candidate. Are compared according to the following reselection conditions. Specifically, (1) the path loss value of a downlink component carrier that is paired with an uplink component carrier that is a switching candidate is better than a predetermined threshold, and (2) the uplink component carrier and pair that is a switching candidate The path loss value of the downlink component carrier to be better than the path loss value of the downlink component carrier that is the pair of the selected uplink component carrier, (3) Random access transmission subframe of the uplink component carrier that is the switching candidate Cancels the current random access and transmits the random access channel when the time from the selected uplink component carrier to the next random access transmission subframe is longer than the specified time. Switch the uplink component carrier that.

  Further, when the collision type uplink data transmission subframe is allocated while waiting for a random access response (random access response) from the base station apparatus 2, the mobile station apparatus 1 is assigned to the allocated uplink component carrier. Regardless, uplink transmission is not performed in the collision type uplink data transmission subframe. When the mobile station apparatus 1 cannot receive the random access response from the base station apparatus 2 and is assigned a collision type uplink data transmission subframe while waiting for retransmission of the next random access, the allocated uplink data Regardless of the link component carrier, retransmission of random access is canceled, and uplink transmission is performed in the collision type uplink data transmission subframe. Also, when the mobile station apparatus 1 is performing random access with the dedicated preamble sequence allocated from the base station apparatus 2, the mobile station apparatus 1 gives priority to the random access retransmission process and performs uplink in the collision-type uplink data transmission subframe. Do not send. Note that the mobile station apparatus 1 may consider the above-described conditions when canceling retransmission of random access and performing uplink transmission in a collision-type uplink data transmission subframe.

  FIG. 8 is a flowchart showing an example of uplink component carrier reselection processing of the mobile station apparatus 1 according to the second embodiment of the present invention. In the state where the mobile station apparatus 1 has not received the random access response in the uplink component carrier selected in FIG. 5 and FIG. 7 and is waiting for the retransmission of the next random access, the random access transmission subframe is another uplink component. If it is assigned to a carrier, it is determined whether or not the uplink component carrier satisfies a reselection condition (step S301). Any of the methods described above is used as the reselection condition. If the reselection condition is satisfied (step S301: YES), the current random access is canceled, the uplink component carrier is reselected (step S302), and the process is terminated. On the other hand, when the reselection condition is not satisfied (step S301: NO), the uplink component carrier is not switched (step S303), and the process is terminated.

  As described above, in the second embodiment, when a plurality of uplink frequency bands (component carriers) are set, the mobile station apparatus 1 selects the optimum uplink component carrier and performs uplink transmission. be able to. Further, even when a plurality of methods can be selected for transmitting new transmission data, an optimal transmission method can be selected. Moreover, the mobile station apparatus 1 can also switch the uplink component carrier which transmits a random access channel suitably based on a predetermined condition. Optimal uplink component carrier selection and switching, random access cancellation processing, and random access channel transmission setting reconfiguration processing are performed by the RRC of the mobile station apparatus 1, and from RRC to MAC (random access control unit 109). It is preferred to be directed to. Also, the base station apparatus 2 uses the broadcast information or the RRC message to determine the conditions used by the mobile station apparatus 1 for selecting the optimum uplink component carrier and the conditions used for selecting the transmission method for uplink transmission. 1 to send.

  As described above, the mobile station apparatus 1 can select the uplink component carrier that can transmit the random access channel earliest when the uplink radio resource for transmitting the uplink data is not allocated. Therefore, transmission delay until uplink transmission can be reduced. Further, the mobile station apparatus 1 can reduce transmission delay by switching uplink component carriers that perform random access when a predetermined condition is satisfied. In addition, when the mobile station device 1 can select one of the radio resource request and the collision type data transmission through the random access channel, the mobile station device 1 selects the transmission method based on a predetermined condition. Thus, it is possible to perform uplink transmission with little delay without degrading the quality of uplink transmission. The base station apparatus 2 can make the mobile station apparatus 1 select an optimal transmission method by notifying various information necessary for the mobile station apparatus 1 to perform optimal uplink transmission.

<Third Embodiment>
A third embodiment of the present invention will be described below. In the present embodiment, in addition to the first embodiment and the second embodiment, a method capable of selecting more appropriate uplink transmission by adding uplink transmission timing to the selection criterion will be described. 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. 9 is a diagram for explaining an uplink transmission method of the mobile station apparatus 1 according to the third embodiment of the present invention. In FIG. 9, those already described with reference to FIG. In FIG. 9, TA timer # 1 in UL_CC1 expires midway, and UL_CC1 enters a transmission timing non-adjusted state. On the other hand, TA timer # 2 in UL_CC2 is within the valid period, and UL_CC2 is in the transmission timing adjustment state. At this time, the mobile station apparatus 1 needs to transmit a random access channel in order to make a radio resource request. It is necessary to determine whether it is optimal to transmit the random access channel on the carrier. In particular, it is necessary to determine whether or not to transmit a random access channel on an uplink component carrier whose TA timer has expired and is in a transmission timing non-adjusted state.

  Therefore, in the third embodiment, in addition to the first embodiment or the second embodiment, a selection method in consideration of an uplink component carrier whose TA timer is within the valid period will be described. That is, when the mobile station apparatus 1 selects an uplink component carrier based on the path loss as in the first embodiment, the mobile station apparatus 1 excludes the uplink component carrier in the transmission timing non-adjusted state from the selection candidates. Similarly, when selecting an uplink component carrier based on the allocation of transmission subframes for random access as in the second embodiment, the mobile station device 1 selects an uplink component carrier in a transmission timing non-adjusted state. Remove from the candidate. The mobile station apparatus 1 selects the optimum uplink component carrier and uplink transmission method for the other than the uplink component carrier excluded from the selection candidates using the first embodiment or the second embodiment. . Since the mobile station apparatus 1 does not select the uplink component carrier in the transmission timing non-adjusted state, the mobile station apparatus 1 makes a radio resource request without starting a new TA timer with the uplink transmission. Simplified.

  Also, regarding the uplink component carrier paired with the downlink component carrier whose downlink component carrier reception quality has deteriorated and has caused a downlink problem (Radio link problem) or downlink component carrier failure (CC failure) Alternatively, the mobile station device 1 may be excluded from the selection candidates. Similarly, the mobile station apparatus 1 may also be excluded from the selection candidates for the uplink component carrier paired with the deactivated downlink component carrier. Alternatively, when the mobile station apparatus 1 selects an uplink component carrier that is paired with the deactivated downlink component carrier, the deactivated downlink component carrier is activated together with the uplink transmission, and the uplink transmission is performed. In order to receive the response, reception (monitoring) of one of the downlink control channel and the downlink shared channel of the component carrier may be resumed. Also, when the radio resource that performs collision type data transmission designated by the uplink grant designates an uplink component carrier in a transmission timing non-adjusted state, the mobile station apparatus 1 uses the radio resource to perform collision type data transmission. Do not do.

  Thus, in the third embodiment, the mobile station apparatus 1 can select an uplink component carrier in consideration of whether the transmission timing of the uplink component carrier is adjusted. As described above, when the uplink radio resource for transmitting the uplink data is not allocated, the mobile station apparatus 1 considers whether or not the uplink component carrier transmission timing is adjusted and determines the best uplink A link component carrier can be selected. Therefore, the mobile station apparatus 1 can make a radio resource request without activating a new TA timer with uplink transmission, so that the control process of the mobile station apparatus 1 is simplified.

  The embodiment described above is merely an example, and can be realized 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. Further, in each embodiment, the example using the path loss as the measurement value of the downlink component carrier has been described, but other measurement values (SIR, SINR, RSRP, RSRQ, RSSI, BLER) may be used instead. It is also possible to use a combination of a plurality of these measured values. 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 mobile station device 1 and the base station device 2 are controlled by recording a program for realizing the unit on a computer-readable recording medium, causing the computer system to read and execute the program recorded on the recording medium. You can do it. Here, the “computer system” includes an OS and hardware such as peripheral devices.

  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. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system. .

  In addition, each functional block or various features of the mobile station apparatus 1 and the base station apparatus 2 used in the above embodiments may be configured in a circuit including an LSI that is typically an IC (integrated circuit). . In that case, the integration density of the LSI may be realized at any density. Each functional block and various features may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

  As mentioned above, although embodiment of this invention has been explained in full detail based on the specific example, it is clear that the meaning of this invention and a claim 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 present invention.

  In one aspect of the present invention, (1) the mobile station apparatus of the present invention aggregates a plurality of frequency bands, connects to the base station apparatus, and transmits uplink radio resources necessary for transmitting uplink data. A mobile station apparatus that requests the base station apparatus, and based on the first condition, selects an uplink frequency band for performing a radio resource request using a random access channel from any frequency band, Based on the second condition, either radio resource request using a random access channel or uplink data transmission using an uplink radio resource common to another mobile station apparatus is selected. And

  In this way, the mobile station apparatus selects an uplink frequency band for performing a radio resource request using a random access channel from any one of the frequency bands based on the first condition, and based on the second condition Since either one of the radio resource request using the random access channel or the uplink data transmission by the uplink radio resource common to other mobile station apparatuses is selected, the quality is determined based on the path loss value. A good uplink component carrier can be selected. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared.

  (2) Further, the mobile station apparatus of the present invention indicates that the transmission setting of the random access channel is set and that the uplink frequency band corresponds to the downlink frequency band with the best reception quality. The first condition is assumed.

  As described above, the first condition is that the transmission setting of the random access channel is set and the uplink frequency band corresponding to the downlink frequency band having the best reception quality is used. The station apparatus can select an uplink component carrier with good quality based on the path loss value. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared.

  (3) In addition, the mobile station apparatus of the present invention is configured so that the random access channel is set to be transmitted, and that the first frequency band is an uplink frequency band in which the random access channel can be transmitted earliest. The conditions are as follows.

  Thus, since the first condition is that the transmission setting of the random access channel is set and the uplink frequency band that can transmit the random access channel earliest, the mobile station apparatus Since the random access channel can be transmitted at the fastest speed, the delay time until uplink transmission is actually started can be minimized.

  (4) In addition, the mobile station apparatus of the present invention has the best reception quality in the uplink frequency band in which the transmission setting of the random access channel is set and the random access channel can be transmitted earliest. The first condition is that it is an uplink frequency band corresponding to a certain downlink frequency band.

  As described above, the transmission setting of the random access channel is set, and the uplink frequency band in which the random access channel can be transmitted earliest corresponds to the downlink frequency band having the best reception quality. Since the first condition is that the frequency band is an uplink frequency band, the mobile station apparatus can select an uplink component carrier with good quality based on the path loss value. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared. In addition, since the mobile station apparatus can transmit the random access channel at the fastest speed, the delay time until uplink transmission is actually started can be minimized.

  (5) Moreover, the mobile station apparatus of this invention is characterized by including in the said 1st condition that the transmission timing of the uplink between the said base station apparatuses is adjusted.

  Thus, since the first condition includes that the uplink transmission timing with the base station apparatus is adjusted, the mobile station apparatus does not select the uplink component carrier in the transmission timing non-adjusted state. Therefore, since the radio resource request is made without starting a new TA timer with uplink transmission, the control processing of the mobile station apparatus is simplified.

  (6) Further, the mobile station apparatus of the present invention has an uplink radio resource common to other mobile station apparatuses for the uplink frequency band selected based on the first condition, When allocated prior to the random access channel, the uplink radio resource is selected to be transmitted by the uplink radio resource, while the uplink radio resource common to other mobile station apparatuses is randomly accessed. If the channel is not allocated before the channel, the second condition is to select a radio resource request using a random access channel.

  As described above, the uplink radio resource common to the other mobile station apparatuses is allocated to the uplink frequency band selected based on the first condition before the random access channel. In the case where uplink data transmission is selected using the uplink radio resource, the uplink radio resource common with other mobile station apparatuses is not allocated prior to the random access channel. Selects a radio resource request using a random access channel, so that it is possible to perform uplink transmission with little delay without degrading the quality of uplink transmission.

  (7) Further, the mobile station apparatus of the present invention is an uplink frequency band corresponding to a downlink frequency band whose reception quality satisfies a predetermined threshold, and is selected based on the first condition The uplink radio resources common to other mobile station apparatuses for the uplink frequency bands other than the frequency band of the above are from the random access channel assigned to the selected uplink frequency band. The uplink frequency band corresponding to the downlink frequency band in which the reception quality satisfies a predetermined threshold, while selecting transmission of the uplink data by the uplink radio resource. And an uplink frequency band other than the uplink frequency band selected based on the first condition are shared with other mobile station apparatuses. If the uplink radio resource is not allocated prior to the random access channel allocated to the selected uplink frequency band, the radio resource request using the random access channel is selected. The second condition is assumed.

  As described above, an uplink frequency band corresponding to a downlink frequency band whose reception quality satisfies a predetermined threshold, and an uplink frequency other than the uplink frequency band selected based on the first condition. When the uplink radio resource common to other mobile station apparatuses is allocated to the band prior to the random access channel allocated to the selected uplink frequency band, While selecting transmission of uplink data by the uplink radio resource, an uplink frequency band corresponding to a downlink frequency band whose reception quality satisfies a predetermined threshold, based on the first condition For uplink frequency bands other than the selected uplink frequency band, an uplink radio resource common to other mobile station apparatuses is used. If the source is not assigned prior to the random access channel assigned to the selected uplink frequency band, the radio resource request using the random access channel is selected. It is possible to perform uplink transmission with less delay without degrading quality.

  (8) Moreover, the base station apparatus of this invention sets the said 1st condition and the said 2nd condition separately with respect to the mobile station apparatus in any one of said (1) to (7). It is characterized by that.

  Thus, since the first condition and the second condition are individually set for the mobile station apparatus described in any one of (1) to (7) above, the mobile station apparatus sets the path loss value to Based on this, it is possible to select an uplink component carrier with good quality. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared.

  (9) Further, the communication system of the present invention aggregates a plurality of frequency bands so that a base station apparatus and a mobile station apparatus are connected to each other, and an uplink link necessary for the mobile station apparatus to transmit uplink data is provided. A communication system that requests radio resources from the base station device, wherein the base station device individually sets a first condition and a second condition for the mobile station device, and the mobile station The apparatus selects an uplink frequency band for performing a radio resource request using a random access channel from one of the frequency bands based on the first condition, and selects a random access channel based on the second condition. It is characterized by selecting either the used radio resource request or uplink data transmission using an uplink radio resource common to other mobile station apparatuses.

  In this way, the mobile station apparatus selects an uplink frequency band for performing a radio resource request using a random access channel from any one of the frequency bands based on the first condition, and based on the second condition Since either one of the radio resource request using the random access channel or the uplink data transmission by the uplink radio resource common to other mobile station apparatuses is selected, the quality is determined based on the path loss value. A good uplink component carrier can be selected. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared.

  (10) In the communication system of the present invention, the transmission setting of the random access channel and the uplink frequency band corresponding to the downlink frequency band having the best reception quality are The first condition is assumed.

  As described above, the first condition is that the transmission setting of the random access channel is set and the uplink frequency band corresponding to the downlink frequency band having the best reception quality is used. The station apparatus can select an uplink component carrier with good quality based on the path loss value. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared.

  (11) Further, the communication system of the present invention is configured so that the transmission setting of the random access channel is set and that the frequency band of the uplink that can transmit the random access channel earliest is the first frequency band. Condition.

  Thus, since the first condition is that the transmission setting of the random access channel is set and the uplink frequency band that can transmit the random access channel earliest, the mobile station apparatus Since the random access channel can be transmitted at the fastest speed, the delay time until uplink transmission is actually started can be minimized.

  (12) In addition, the communication system of the present invention has the best reception quality in the uplink frequency band in which the random access channel is set to be transmitted and the random access channel can be transmitted earliest. The first condition is that the uplink frequency band corresponds to the downlink frequency band.

  As described above, the transmission setting of the random access channel is set, and the uplink frequency band in which the random access channel can be transmitted earliest corresponds to the downlink frequency band having the best reception quality. Since the first condition is that the frequency band is an uplink frequency band, the mobile station apparatus can select an uplink component carrier with good quality based on the path loss value. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared. In addition, since the mobile station apparatus can transmit the random access channel at the fastest speed, the delay time until uplink transmission is actually started can be minimized.

  (13) Further, the communication system of the present invention is characterized in that the first condition includes that an uplink transmission timing with the base station apparatus is adjusted.

  Since the first condition includes that the uplink transmission timing with the base station apparatus is adjusted as described above, the mobile station apparatus does not select the uplink component carrier in the transmission timing non-adjusted state. Therefore, since the radio resource request is made without starting a new TA timer with uplink transmission, the control processing of the mobile station apparatus is simplified.

  (14) Further, in the communication system according to the present invention, the uplink radio resource common to the other mobile station apparatuses is random for the uplink frequency band selected based on the first condition. When allocated prior to the access channel, the uplink radio resource is selected to be transmitted by the uplink radio resource, while the uplink radio resource common to other mobile station apparatuses is a random access channel. If it is not assigned earlier than this, the second condition is to select a radio resource request using a random access channel.

  As described above, the uplink radio resource common to the other mobile station apparatuses is allocated to the uplink frequency band selected based on the first condition before the random access channel. In the case where uplink data transmission is selected using the uplink radio resource, the uplink radio resource common with other mobile station apparatuses is not allocated prior to the random access channel. Selects a radio resource request using a random access channel, so that the mobile station apparatus can perform uplink transmission with little delay without degrading the quality of uplink transmission.

  (15) Further, the communication system of the present invention is an uplink frequency band corresponding to a downlink frequency band whose reception quality satisfies a predetermined threshold value, and is an uplink frequency band selected based on the first condition. For uplink frequency bands other than the frequency band, the uplink radio resource common to other mobile station apparatuses is more than the random access channel assigned to the selected uplink frequency band. If it is assigned first, the uplink frequency band corresponding to the downlink frequency band whose reception quality satisfies a predetermined threshold while selecting transmission of uplink data by the uplink radio resource, With respect to an uplink frequency band other than the uplink frequency band selected based on the first condition, between other mobile station apparatuses When a common uplink radio resource is not allocated prior to a random access channel allocated to the selected uplink frequency band, a radio resource request using the random access channel is selected. Is the second condition.

  As described above, an uplink frequency band corresponding to a downlink frequency band whose reception quality satisfies a predetermined threshold, and an uplink frequency other than the uplink frequency band selected based on the first condition. When the uplink radio resource common to other mobile station apparatuses is allocated to the band prior to the random access channel allocated to the selected uplink frequency band, While selecting transmission of uplink data by the uplink radio resource, an uplink frequency band corresponding to a downlink frequency band whose reception quality satisfies a predetermined threshold, based on the first condition For uplink frequency bands other than the selected uplink frequency band, an uplink radio resource common to other mobile station apparatuses is used. The mobile station apparatus selects a radio resource request using the random access channel when the source is not assigned prior to the random access channel assigned to the selected uplink frequency band. Therefore, it is possible to perform uplink transmission with little delay without degrading the quality of uplink transmission.

  (16) Further, in the communication method of the present invention, a plurality of frequency bands are aggregated to connect a base station apparatus and a mobile station apparatus, and the uplink station necessary for the mobile station apparatus to transmit uplink data A communication method for requesting radio resources to the base station apparatus, wherein the base station apparatus individually sets a first condition and a second condition for the mobile station apparatus, and In the mobile station apparatus, on the basis of the first condition, a step of selecting an uplink frequency band for performing a radio resource request using a random access channel from any one of the frequency bands, and on the basis of the second condition, Either a radio resource request using a random access channel or transmission of uplink data using an uplink radio resource common to other mobile station apparatuses Characterized in that it comprises at least a step of selecting and the.

  As described above, the mobile station apparatus selects, based on the first condition, the uplink frequency band for performing the radio resource request using the random access channel from any one of the frequency bands, and the second condition. Based on the path loss value, the radio resource request using the random access channel or the uplink data transmission by the uplink radio resource common to other mobile station devices is selected. A high-quality uplink component carrier can be selected. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared.

  (17) Moreover, the integrated circuit of the present invention is an integrated circuit that is mounted on a mobile station device to cause the mobile station device to perform a plurality of functions, and aggregates a plurality of frequency bands to form a base station device. A random access from any frequency band based on the first condition, a function for requesting the base station apparatus for uplink radio resources necessary for transmitting uplink data, A function of selecting an uplink frequency band for performing a radio resource request using a channel, and a radio resource request using a random access channel or an uplink common to other mobile station apparatuses based on the second condition A function of selecting any one of uplink data transmissions by radio resources of a link, and causing the mobile station apparatus to exhibit a series of functions To.

  In this way, the mobile station apparatus selects, based on the first condition, a function for selecting an uplink frequency band for performing a radio resource request using a random access channel from any one of the frequency bands, and the second condition. Based on the path loss value, the radio resource request using the random access channel or the uplink data transmission by the uplink radio resource common to other mobile station devices is selected. A high-quality uplink component carrier can be selected. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared.

  (18) Further, the control program for a mobile station apparatus according to the present invention aggregates a plurality of frequency bands and connects to the base station apparatus to transmit uplink radio resources necessary for transmitting uplink data to the base station. A control program for a mobile station device that requests a device, based on a process for requesting the base station device for uplink radio resources necessary for transmitting uplink data, and a first condition A process of selecting an uplink frequency band for performing a radio resource request using a random access channel from any frequency band, and a radio resource request using a random access channel or another based on the second condition Selecting either one of uplink data transmissions using uplink radio resources common with the mobile station apparatus. The process of communication, characterized by being readable and executable on command of the computer.

  As described above, the mobile station apparatus selects, based on the first condition, processing for selecting an uplink frequency band for performing a radio resource request using a random access channel from any one of the frequency bands, and the second condition. Based on the path loss value, the radio resource request using the random access channel or the uplink data transmission by the uplink radio resource common to other mobile station devices is selected. A high-quality uplink component carrier can be selected. In addition, the success probability of a radio resource request is improved, and transmission power reduction and transmission delay reduction can be realized simultaneously. Further, this method has an advantage that the control of the mobile station apparatus is simplified because only the path loss values are compared.

11 to 13 Transmitting device 21 to 23 Receiving device 1 Mobile station device 2 Base station device 101 Receiving unit 103 Demodulating unit 105 Decoding unit 107 Measurement processing unit 109 Random access control unit 111 Encoding unit 113 Modulating unit 115 Transmitting unit 117 Control unit 119 Higher level Layer 201 Reception unit 203 Demodulation unit 205 Decoding unit 207 Upper layer 209 Encoding unit 211 Modulation unit 213 Transmission unit 215 Control unit 217 Network signal transmission / reception unit

Claims (6)

A mobile station device connected to a base station device using a plurality of cells,
When making a request for uplink radio resources necessary for uplink data transmission based on the first information and the second information transmitted from the base station apparatus to the mobile station apparatus using the RRC message, Selecting a first cell from the plurality of cells based on the first information, and determining the request method in the first cell according to the second information;
The second information is information for notifying the uplink control channel resource, and when the uplink control channel resource is not notified, random access is used as the request method in the first cell. A mobile station apparatus that performs the request by selecting a method that uses the random access from among a method that performs random access and a method that does not use random access. A base station device connected to a mobile station device using a plurality of cells,
First information used for causing the mobile station apparatus to select a first cell used for requesting uplink radio resources necessary for transmission of uplink data from the plurality of cells, and the first information Second information used for determining the request in the cell is transmitted for each mobile station apparatus using an RRC message, and the second information is information for notifying an uplink control channel resource. If the uplink control channel resource is not notified , the request made by the method using random access among the method using random access and the method not using random access is sent to the mobile station. A base station apparatus receiving from the apparatus. A processing method in a mobile station apparatus connected to a base station apparatus using a plurality of cells,
When requesting uplink radio resources necessary for transmission of uplink data based on the first information and the second information transmitted from the base station apparatus to the mobile station apparatus using the RRC message, Selecting a first cell from the plurality of cells based on the first information, and determining the request method in the first cell according to the second information;
The second information is information for notifying the uplink control channel resource, and when the uplink control channel resource is not notified, random access is used as the request method in the first cell. The method of making a request by selecting a method of using the random access from a method of using the random access and a method of not using the random access. A processing device mounted on a mobile station device connected to a base station device using a plurality of cells,
A processing apparatus that causes the mobile station apparatus to execute the processing method according to claim 3. A processing method in a base station apparatus connected to a mobile station apparatus using a plurality of cells,
First information used for causing the mobile station apparatus to select a first cell used for requesting uplink radio resources necessary for transmission of uplink data from the plurality of cells, and the first information Second information used for determining the request in the cell is transmitted for each mobile station apparatus using an RRC message, and the second information is information for notifying an uplink control channel resource. If the uplink control channel resource is not notified , the request made by the method using random access among the method using random access and the method not using random access is sent to the mobile station. A processing method comprising receiving from a device. A processing device implemented in a base station device connected to a mobile station device using a plurality of cells,
A processing apparatus that causes the base station apparatus to execute the processing method according to claim 5.