JP6532154B2 - Mobile station device - Google Patents

Description

The present invention also relates to the transfer Dokyoku equipment.

  Evolved that realizes high-speed communication by adopting flexible scheduling of predetermined frequency and time units called Orthogonal Frequency-Division Multiplexing (OFDM) communication method and resource block in 3rd Generation Partnership Project (3GPP), a standardization project A study of Universal Terrestrial Radio Access (hereinafter referred to as EUTRA) is being conducted. In EUTRA, the mobile station apparatus requests radio resource allocation information (uplink grant) indicating transmission permission of the uplink shared channel for transmitting uplink data by making a radio resource request (scheduling request) to the base station apparatus. 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 radio resource request using the uplink control channel takes time until data transmission, the base station apparatus newly adds to the mobile station apparatus whose uplink transmission timing has been adjusted. Uplink data is allocated by allocating common uplink radio resources among mobile station apparatuses by uplink grant, and transmitting data using a common uplink radio resource between mobile station apparatuses that have data to be transmitted A method of collision type data transmission has been proposed to reduce the delay time required for the transmission of. The uplink radio resource in this case is also called, in particular, a collision type (competitive type) radio resource.

  Also, in 3GPP, discussion of Advanced EUTRA, which realizes higher-speed data transmission and has EUTRA upward compatibility, has been started. Carrier Aggregation has been proposed as a technology in Advanced EUTRA. Carrier aggregation is a technology for improving data rates by aggregating and using a plurality of different frequency bands (also called component carriers). Also, it has been proposed that a mobile station apparatus in communication 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 # 66 bis, 29 June-03 July, 2009, Los Angeles, USA R2-101567, NTT DOCOMO, 3GPP TSG-RAN WG 2 # 69, 22-26 February 2010, San Francisco, USA

When a mobile station apparatus connectable to a base station apparatus using multiple frequency bands performs uplink transmission, a detailed study is made as to how to select an appropriate uplink transmission method and transmission frequency band. Not have problems.

The present invention has been made in view of such circumstances, and is applicable to an uplink transmission method appropriate for a case where a mobile station apparatus connectable to a base station apparatus using a plurality of frequency bands performs uplink transmission You select a transmission frequency band and an object thereof is to provide a mobile station apparatus location capable of performing uplink transmission.

  (1) In order to achieve the above object, the present invention takes the following measures. That is, a mobile station apparatus according to the present invention is a mobile station apparatus connected to a base station apparatus, which requests uplink radio resources necessary for transmitting uplink data based on the first information. A cell is selected, the method of the request in the first cell is determined based on second information, the first information and the second information are transmitted from the base station apparatus to the mobile station apparatus. The first cell is a cell for which transmission setting for random access is set among a plurality of cells set to the mobile station apparatus, received from an RRC message to be transmitted, and the second information is the It is characterized in that it is information for notifying of the setting of the uplink control channel regarding the request.

  (2) Further, the mobile station apparatus according to the present invention, when the second information is not notified, uses random access as a method of the request in the first cell and does not use random access. And the request is made by selecting the method of using the random access.

  (3) Further, a base station apparatus according to the present invention is a base station apparatus connected to a mobile station apparatus, and transmits first information and second information to each of the mobile station apparatuses using an RRC message, In the mobile station apparatus, the first information is used to select a first cell to be used for a request for uplink radio resources necessary for transmission of uplink data, and the second information is the second information. The first cell is used to determine the method of the request in one cell, and the first cell is a cell for setting a transmission setting related to random access among a plurality of cells set in the mobile station apparatus, It is characterized in that the setting of the uplink control channel regarding the request is notified as the second information.

  (4) Further, the mobile station apparatus according to the present invention makes the request by selecting either the method using random access or the method not using random access as a method of the request based on the second information. It is characterized by

According to the present invention, when the mobile station apparatus connectable to the base station apparatus using a plurality of frequency bands performs uplink transmission, the uplink transmission is performed by selecting an appropriate uplink transmission method and transmission frequency band. It is possible to do.

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 an example of the structure of the component carrier set to the carrier aggregation possible mobile station apparatus 1 in this invention, and 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 an 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 an 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 an 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 showing an example of the communication network composition concerning the embodiment of the present invention. When the mobile station apparatus 1 according to the embodiment of the present invention performs carrier aggregation, an example of the correspondence relationship between the downlink component carrier and the uplink component carrier set by the base station apparatus 2 to the mobile station apparatus 1 will be described. FIG.

  In the communication system according to the present embodiment, a base station apparatus and a mobile station apparatus are connected together by aggregating a plurality of frequency bands, and the mobile station apparatus makes an uplink radio resource request to the base station apparatus. It is a communication system using a random access channel, and the base station apparatus assigns a plurality of transmission settings of the random access channel applied to at least one uplink frequency band to the mobile station apparatus, and the mobile station apparatus In the case where uplink radio resources necessary for uplink data transmission are requested to the base station apparatus, an uplink frequency band for making a radio resource request using a random access channel is based on the first condition. Radio resource request by random access channel, or uplink link common to the mobile station apparatuses And selecting based on either the uplink transmission method for uplink transmission by the radio resource to the second condition.

  In the present specification, the present invention is disclosed in terms of improvement of a mobile station apparatus, a base station apparatus, a communication system and a radio resource allocation method in the case where the mobile station apparatus and the base station apparatus are connected using a plurality of frequency bands. However, the communication system to which the present invention can be applied is not limited to a communication system that is upward compatible with EUTRA, such as EUTRA or Advanced EUTRA.

  First, carrier aggregation, physical channels, and uplink transmission methods according to the present embodiment will be briefly described.

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

  Also, it is possible to aggregate continuous or discontinuous component carriers in the same frequency band, for example, 2.4 GHz band. The frequency bandwidth of each component carrier may be a frequency bandwidth narrower than 20 MHz, and each frequency bandwidth may be different. The base station apparatus assigns 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 data buffer staying, the reception quality of the mobile station apparatus, the load in the cell, and QoS. Can be increased or decreased.

(2) Physical channels The main physical channels (or physical signals) used in EUTRA and Advanced EUTRA will be described. Physical channels may be added or changed in the future in EUTRA and Advanced EUTRA, but even if they are changed, they do not affect the description of the respective embodiments of the present invention. Synchronization signals are composed of three types of primary synchronization signals and a secondary synchronization signal composed of 31 types of codes arranged alternately in the frequency domain, and the signals of the primary synchronization signal and the secondary synchronization signal The combination indicates the 504 cell identifiers (cell ID: Physical Cell Identity; PCI) identifying the base station apparatus and the frame timing for wireless synchronization. The mobile station apparatus identifies the cell ID of the received synchronization signal by 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. The broadcast information not notified on the physical broadcast information channel is notified of the radio resource on the downlink control channel, and is transmitted on the downlink shared channel in the layer 3 message (system information). As broadcast information, a cell global identifier (CGI; Cell Global Identifier) indicating an identifier specific to a cell, 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. Also, the downlink reference signal is a known signal that is periodically repeated at frequency and time positions based on a predetermined rule. The mobile station apparatus measures the reception quality for each cell by receiving the downlink reference signal. The mobile station apparatus also uses the downlink reference signal as a downlink control channel transmitted simultaneously with the downlink reference signal, or as a reference signal for demodulation of the downlink shared channel. 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 signals (RS), its application and meaning are the same.

  The downlink control channel (PDCCH; Physical Downlink Control Channel) is transmitted by several OFDM symbols from the beginning of each subframe, and radio resource allocation information according to the scheduling of the base station apparatus to the mobile station apparatus, transmission, It is used to indicate the adjustment amount of increase or decrease of the power. The mobile station apparatus monitors (monitors) the downlink control channel addressed to the mobile station before transmitting / receiving downlink data or layer 3 messages (paging, handover command, etc.) which are downlink control data, and By receiving the downlink control channel, it is necessary to obtain, from the downlink control channel, radio resource allocation information called uplink grant at transmission and downlink grant at reception.

  An uplink control channel (PUCCH) is a reception acknowledgment of data transmitted on a downlink shared channel, downlink channel information (CQI: Channel Quality Indicator), and scheduling of uplink radio resource requests. Used to make a request (SR: Scheduling Request). A downlink shared channel (PDSCH; Physical Downlink Shared Channel) is also used to notify paging and broadcast information as a layer 3 message which is downlink control data, in addition to downlink data. Radio resource assignment information of the downlink shared channel is indicated by the downlink control channel. An uplink shared channel (PUSCH; Physical Uplink Shared Channel) mainly transmits uplink data and uplink control data, and can include control data such as downlink reception quality and ACK / NACK. Also, as in the downlink, the radio resource assignment information of the uplink shared channel is indicated by the downlink control channel.

  A random access channel (PRACH; Physical Random Access Channel) is a channel used to notify a preamble sequence and has a guard time. The random access channel is used as an access means to the base station apparatus of the mobile station apparatus. The mobile station apparatus also requests a radio resource when the uplink control channel is not set, and transmission timing adjustment information (timing advance (TA: Timing Advance) necessary for adjusting the uplink transmission timing to the reception timing window of the base station apparatus. Use a random access channel to request the base station apparatus to The mobile station apparatus having received the transmission timing adjustment information sets the effective time (TA timer) of the transmission timing adjustment information, and manages the state as the transmission timing adjustment state during the effective time and the transmission timing non-adjustment state outside the effective period. Do. The base station apparatus can also assign a dedicated preamble sequence (Dedicated preamble) to the mobile station apparatus to start random access. The other physical channels are not related to the respective embodiments of the present invention, and therefore detailed description will be omitted.

(3) Uplink Transmission Method In EUTRA, the following three methods are prepared as a method for the mobile station apparatus to start transmitting uplink data to the base station apparatus. The first method is that, when the base station apparatus allocates the resources (transmission setting (configuration)) of the uplink control channel necessary for making a radio resource request to the mobile station apparatus, the mobile station apparatus has This is a method of making a radio resource request (a request for transmission of uplink grant) to a base station apparatus using an uplink control channel. The mobile station apparatus releases uplink control channel resources when it can not receive an uplink grant from the base station apparatus even if the maximum number of transmissions of the uplink control channel is reached. In the first method, the mobile station apparatus is in the transmission timing adjustment state.

  In the second method, the mobile station apparatus is in the transmission timing adjustment state, but the base station apparatus has not assigned the uplink control channel necessary for making a radio resource request to the mobile station apparatus, or TA timer Is a non-operating state (transmission timing non-adjustment state), the mobile station apparatus makes a radio resource request to the base station apparatus using a random access channel. The third method is that, when the base station apparatus assigns a collision type radio resource using the downlink control channel when the mobile station apparatus is in the transmission timing adjustment state, the mobile station apparatus having data to transmit is the mobile station This method is a method of transmitting uplink data using a collision type radio resource common among devices. The third method is different from the other methods in that the base station apparatus indicates a radio resource for transmitting the uplink shared channel regardless of the request of the mobile station apparatus.

[Example of communication network configuration of the present invention]
FIG. 10 is a diagram showing an example of a communication network configuration according to an embodiment of the present invention. The mobile station apparatus 1 can wirelessly connect to the base station apparatus 2 by simultaneously using a plurality of frequency bands (component carriers, Band1 to Band3) by carrier aggregation, one communication base configuration as a communication network configuration 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 control of each frequency band is performed by one base station apparatus 2 simplifies control. From the point of view of However, the configuration may be such that the base station apparatus 2 performs transmission of a plurality of frequency bands with one transmitting device because the frequency bands are continuous frequency bands. Furthermore, the configuration may be such that transmission and reception timings are different for each frequency band. The communicable range of each frequency band controlled by the transmitters 11 to 13 of the base station device 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, although the areas covered by the frequency of the component carrier formed by the base station apparatus 2 are referred to as cells, respectively, this is the definition of cells in the communication system actually operated. Note that it may be different. For example, in some communication systems, some of the component carriers used by carrier aggregation may be defined as merely 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 a cell in the communication system actually operated does not affect the gist of the present invention. The mobile station apparatus 1 may be wirelessly connected to the base station apparatus 2 via the relay station apparatus (or repeater) for each frequency band. That is, the base station device 2 of the present invention can be replaced with a relay station device.

  The third generation base station apparatus 2 defined by 3GPP is referred to as a Node B (Node B), and the base station apparatus 2 in EUTRA and Advanced EUTRA is referred to as an eNode B (eNode B). The base station apparatus 2 manages a cell which is an area in which the mobile station apparatus 1 can communicate, and the cell is also referred to as a femtocell, a picocell or a nanocell according to the size of the area in which the mobile station apparatus 1 can communicate. Further, 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 called neighboring cells.

[Example of configuration of component carrier configuration]
FIG. 11 shows the correspondences between downlink component carriers that the base station apparatus 2 sets for the mobile station apparatus 1 and uplink component carriers when the mobile station apparatus 1 according to the embodiment of the present invention performs carrier aggregation. It is a figure showing an example of a relation. 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 in FIG. 11 are in a cell specific link (Cell Specific Linkage).

  The cell specific connection is, for example, a correspondence (linkage relationship) between uplink and downlink frequency bands accessible to the base station apparatus 2 when the mobile station apparatus 1 is not carrying out carrier aggregation, and is typically The correspondence relationship is indicated for each component carrier in the broadcast information. The correspondence relationship between uplink and downlink frequency bands is defined as uplink information and downlink specifically determined for each operation frequency when broadcast information explicitly indicates as frequency information or is not explicitly indicated. It is implicitly indicated by using information of frequency difference of. The present invention is not limited to these methods, and as long as it is possible to indicate the correspondence between uplink and downlink frequency bands for each cell, it may be instructed using another method. A plurality of component carriers may be cell-specifically connected to one component carrier.

  On the other hand, the base station apparatus 2 may individually set (individual connection; UE Specific Linkage) the correspondence relationship between the downlink component carrier and the uplink component carrier separately for each mobile station apparatus 1 separately from the cell specific connection. It is possible. Multiple component carriers may be individually connected to one component carrier. Even when the plurality of UL_CCs are set in the mobile station apparatus 1, the base station apparatus 2 allocates the uplink control channel for performing the scheduling request to only one of the UL_CCs. On the other hand, the base station apparatus 2 can also allocate a plurality of random access channels for each UL_CC or for each frequency band. In consideration of the above matters, preferred embodiments of the present invention will be hereinafter described in detail with reference to the attached drawings. In the description of the present invention, when it is determined that specific descriptions of known functions and configurations related to the present invention obscure the gist of the present invention, the detailed description will be omitted.

First Embodiment
The 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 when the mobile station device 1 newly starts uplink transmission, and an uplink transmission method It shows about the selection method.

  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 the reception unit 101, demodulation unit 103, decoding unit 105, measurement processing unit 107, random access control unit 109, coding unit 111, modulation unit 113, transmission unit 115, control unit 117, and upper layer 119. Configured The upper layer 119 includes RRC (Radio Resource Control) that performs radio resource control. The random access control unit 109 also functions as part of a MAC (Medium Access Control) that manages the data link layer. Prior to reception, mobile station control information is input from the upper layer 119 to the control unit 117, and control information on reception is appropriately input to the reception unit 101, demodulation unit 103, and 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 needed. In addition to the information on the reception frequency band, the reception control information includes information such as the reception timing, multiplexing method, and radio resource allocation information on each channel.

  The reception signal is received by the reception unit 101. The receiving unit 101 receives a signal in a 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, correctly decodes the downlink data and downlink control data, and inputs each decoded data to upper layer 119. Measurement processing section 107 measures the reception quality (SIR, SINR, RSRP, RSRQ, RSSI, path loss, etc.) of the downlink reference signal for each cell (component carrier), or the reception error of the downlink control channel or downlink shared channel. Downlink measurement information is generated based on the rate measurement result, and the downlink measurement information is output to upper layer 119.

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

  In addition to the uplink data and the uplink control data from the upper layer 119, the random access data information on the transmission of the random access channel is input from the random access control unit 109 to the coding unit 111. The encoding unit 111 appropriately encodes each data according to the transmission control information, and outputs the encoded data to the modulation unit 113. The modulation unit 113 modulates the output from the encoding unit 111. The transmitter unit 115 maps the output of the modulator unit 113 in the frequency domain, converts the signal in the frequency domain into a signal in the time domain, carries it on a carrier wave of a predetermined frequency, and performs power amplification for transmission. The 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 receiver 201, a demodulator 203, a decoder 205, an upper layer 207, an encoder 209, a modulator 211, a transmitter 213, a controller 215, and a network signal transceiver 217. The upper layer 207 inputs downlink data and downlink control data to the coding unit 209. The encoding unit 209 encodes the input data and inputs the data to the modulation unit 211. The modulation unit 211 modulates the encoded signal. Further, the signal output from the modulation unit 211 is input to the transmission unit 213. The transmitter 213 maps the input signal in the frequency domain, converts the signal in the frequency domain into a signal in the time domain, places the signal on a carrier wave of a predetermined frequency, and performs power amplification for transmission. The downlink shared channel on which downlink control data is allocated typically constitutes a layer 3 message (RRC message).

  Also, the receiving unit 201 converts a signal received from the mobile station device 1 (which may be a signal received via the relay station device) into a baseband digital signal. The digital signal is input to the demodulation unit 203 and demodulated. The signal demodulated by the demodulation unit 203 is subsequently input to the decoding unit 205 to be 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 of these blocks is set by the upper network apparatus (MME or gateway apparatus) and system parameters, and the upper layer 207 inputs it to the control unit 215 as needed. The control unit 215 sets the base station 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 receives the base station control information related to reception and reception control information. As appropriate, the signal is appropriately input to each block of the reception unit 201, the demodulation 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 apparatus 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 relevant to the present invention. Also, the network configuration of the communication system in which the present mobile station device 1 and the present base station device 2 are arranged can be the same as that shown in FIG.

  FIG. 3 is a diagram showing an example of configuration of component carriers set in the mobile station apparatus 1 capable of carrier aggregation and uplink physical channel setting in the present invention. In the example of FIG. 3, as component carrier configurations, component carriers to which cell specific connection is made as a pair of DL_CC1 and UL_CC1 and DL_CC2 and UL_CC2 are set for the mobile station device 1. In addition, 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 device 1 needs to receive (monitor) at least one of the downlink control channel and the downlink shared channel transmitted on the component carrier. On the other hand, when the component carrier is deactivated (deactivated), the mobile station device 1 may not receive (monitor) both the downlink control channel of the component carrier and the downlink shared channel. The base station device 2 preferably uses a MAC control element (MAC control element) that is control information of the MAC as activation or deactivation of the component carrier.

  Furthermore, as the uplink physical channel setting, the transmission setting (uplink control channel setting for radio resource request) of the uplink control channel used for the radio resource request is set only for UL_CC1. In addition, transmission setting (random access channel setting) of different random access channels is performed on uplink component carriers of UL_CC1 and UL_CC2, respectively. That is, the mobile station apparatus 1 needs to manage the transmission timing adjustment information of UL_CC1 and UL_CC2, the TA timer, and the transmission timing adjustment state / transmission timing non-adjustment state independently for each component carrier.

  The scope of the present invention is not limited to the example shown in 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 to another uplink component carrier. It is applicable if it is set. For example, the uplink and downlink component carriers set as a pair may not be cell-specific, and the base station apparatus 2 may set them individually for each mobile station apparatus 1.

  FIG. 4 is a diagram for describing a method of uplink transmission of the mobile station device 1 according to the first embodiment of the present invention. The horizontal axis in FIG. 4 indicates the passage of time. Uplink control channel transmission subframes (311, 312), random access transmission subframes (411 to 413, 421 to 422), and collision type uplink data transmission subframes 321 in the figure can be used by the mobile station apparatus 1, respectively. Transmission timing (transmission resource) of the uplink transmission. However, differences in frequency resources are omitted for simplification. 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 in UL_CC1.

  Further, the base station apparatus 2 assigns the transmission setting of the random access channel for the mobile station apparatus 1 to transmit the random access channel in UL_CC1 and UL_CC2, respectively. In addition, 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 transmits the uplink control channel transmission subframe validity period (the radio resource request is continued until the uplink grant is received). In the period in which the number of transmissions of the uplink control channel transmitted for the above is less than the maximum number of transmissions), the radio resource request is made to the base station apparatus 2 using the allocated uplink control channel (311). However, if the radio resource is not allocated from the base station apparatus 2 after transmitting the uplink control channel (311), the radio resource request is again based using the uplink control channel (312) at the next transmission opportunity. The station apparatus 2 is performed. In the example of FIG. 4, the mobile station apparatus 1 has an opportunity to transmit a random access channel in a random access channel transmission subframe (411, 412) of UL_CC1 and a random access channel transmission subframe (421) of UL_CC2 during this period. , Radio resource request by random access channel is not performed.

  When the mobile station apparatus 1 has transmitted the next uplink control channel (312) and reaches the maximum number of transmissions of the radio resource request using the uplink control channel, the uplink control channel transmission subframe valid period ends. It is assumed that the uplink control channel transmission setting is released.

  Subsequently, the mobile station device 1 needs to transmit a random access channel in order to make a radio resource request, but since the transmission setting of the random access channel is set to a plurality of uplink component carriers, which uplink component It is necessary to determine if it is optimal to transmit the random access channel on the carrier. The simplest method is to transmit the random access channel on the uplink component carrier that was transmitting the uplink control channel, but whether the transmission configuration of the random access channel is set to the uplink component carrier or not Depending on the setting of the base station apparatus 2, exceptional cases must be considered, and another method is desirable because the processing of the mobile station apparatus 1 becomes complicated. Thus, in the first embodiment, a method of selecting an uplink component carrier with the highest quality among a plurality of uplink component carriers will be described.

  After the end of the uplink control channel transmission subframe validity period (after the uplink control channel transmission subframe (312)), the mobile station apparatus 1 performs uplink component carriers (UL_CC1 and UL_CC2) on which the transmission setting of the random access channel is performed. Path loss of downlink reference signal of downlink component carrier (DL_CC1 and DL_CC2) paired with) is measured, and the value of measured path loss is paired with downlink component carrier with the best (best reception quality) uplink Select a link component carrier. Then, on the selected uplink component carrier, a radio resource request is made using a random access channel. Alternatively, one of the uplink component carriers that is paired with the downlink component carrier whose value of path loss is better than a predetermined value is selected at random or 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 an uplink component carrier with high quality based on the value of path loss, so the success rate of the radio resource request is improved. Thus, it is possible to simultaneously reduce the transmission power and the transmission delay. In addition, this method also has the advantage that control of the mobile station apparatus 1 is simplified since only the path loss values are compared. The uplink component carriers may not have downlink component carriers as a pair. That is, the uplink component carrier may be selected based on the value derived by calculation in the mobile station apparatus 1 by adding an offset value to the value of the path loss 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, the random access channel is transmitted in the nearest 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 to perform uplink transmission in subframe (321).

  At this time, the mobile station apparatus 1 detects the allocation of the collision type uplink data transmission subframe (321) on the uplink component carrier (UL_CC2) other than the selected uplink component carrier (UL_CC1), and is thus detected. If 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. Then, the mobile station apparatus 1 performs uplink transmission in the collision type uplink data transmission subframe (321) if the condition is satisfied, and the collision type uplink data transmission subframe (321) if the predetermined condition is not satisfied. Do not perform uplink transmission in).

  The predetermined conditions are: (1) the path loss value of the downlink component carrier forming a pair is better (or worse) than the predetermined threshold; (2) the number of untransmitted uplink transmission data bits is equal to or greater than the specified value (Or less than a designated value), (3) The time from the detected collision type uplink data transmission subframe to the random access transmission subframe is determined by one or more combinations of the designated time or more. These conditions may be specified for each cell in 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 collision type uplink data transmission subframes 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 subframes. The uplink transmission is performed in the collision type uplink data transmission subframe.

  Further, when the collision type uplink data transmission subframe is assigned while waiting for a random access response (random access response) from the base station device 2, the mobile station device 1 is assigned to the assigned uplink component carrier. Regardless, uplink transmission in the collision type uplink data transmission subframe is not performed. The mobile station apparatus 1 can not receive the random access response from the base station apparatus 2 and is allocated uplink when the collision type uplink data transmission subframe is allocated while waiting for the next random access retransmission. Regardless of the link component carrier, the retransmission of random access is canceled and uplink transmission is performed in the collision type uplink data transmission subframe. When the mobile station apparatus 1 cancels the random access retransmission and performs uplink transmission in the collision-type uplink data transmission subframe, the above-described conditions may be taken into consideration. Also, when the mobile station apparatus 1 is executing random access with the dedicated preamble sequence assigned from the base station apparatus 2, priority is given to retransmission processing for random access, and uplink transmission in the collision type uplink data transmission subframe. Do not send.

  By selecting the uplink transmission method based on such conditions, it is possible to perform uplink transmission with less delay without degrading the quality of uplink transmission. Further, in the present invention, the selection condition of the uplink component carrier that requests uplink radio resources necessary for uplink data transmission, and the uplink radio resources common to the radio resource of the random access channel and the mobile station apparatus 1 The base station device 2 may individually set the mobile station device 1 as a selection condition regarding which of the two is used.

  FIG. 5 is a flowchart showing an example of uplink component carrier selection processing of the mobile station device 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 an uplink component carrier that makes a radio resource request by the random access channel in random access transmission component carrier selection. The selection method is as follows. The mobile station apparatus 1 first determines whether a priority is designated from the base station apparatus 2 (step S1). When the priority is designated (step S1: YES), the mobile station apparatus 1 selects one of uplink component carriers according to the priority designated from the base station apparatus 2.

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

  If there is no predetermined value (step S4: NO), the uplink component carrier that is paired with the downlink component carrier with the best measured path loss value (the best reception quality) is selected (step S6). In this way, one uplink component carrier for transmitting a 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 showing an example of selection processing of the uplink transmission method of the mobile station device 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 collision type radio resource allocation before transmitting the random access channel (step S101). When the collision type radio resource allocation is not detected (step S101: NO), random access transmission is selected (step S102). If the collision type radio resource allocation is detected (step S101: YES), that is, if the collision type radio resource allocation is detected in the uplink grant of the downlink control channel, the mobile station apparatus 1 can use 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).

  Then, if they are the same uplink component carrier (step S103: YES), uplink transmission is performed using the collision type radio resource without waiting for a radio resource request by the random access channel (step S104). On the other hand, if the allocation is for 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, if the condition is not satisfied (step S105: NO), uplink transmission is not performed, and a transmission subframe of the random access channel is waited (step S102). The determination as to whether or not the predetermined condition is satisfied is determined by one or more of the combinations described above.

  Thus, in the first embodiment, the mobile station apparatus 1 selects an optimal uplink component carrier and performs uplink transmission when a plurality of uplink frequency bands (component carriers) are set. be able to. In addition, even when a plurality of methods can be selected to transmit new transmission data, an optimal transmission method can be selected. It is preferable that the selection of the optimal uplink component carrier is performed in the RRC of the mobile station device 1 and instructed from the RRC to the MAC (random access control unit 109). Further, the base station apparatus 2 uses the broadcast information or the RRC message for the condition that the mobile station apparatus 1 uses to select the optimal uplink component carrier and the condition that uses the transmission method of uplink transmission, Send to 1.

  As described above, when the uplink radio resource for transmitting the uplink data is not allocated, the mobile station apparatus 1 can select the best uplink component carrier based on the reception quality of the downlink component carrier to be paired. Can be selected, so that the success probability of the radio resource request can be improved, and the reduction of transmission power and the reduction of transmission delay 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 apparatus 1 can select one of the radio resource request and the collision type data transmission on the random access channel, the mobile station apparatus 1 selects the transmission method based on a predetermined condition. Thus, it is possible to perform uplink transmission with less delay without degrading the quality of uplink transmission. The base station apparatus 2 can cause the mobile station apparatus 1 to select the optimal transmission method by notifying the various information necessary for the mobile station apparatus 1 to perform the optimal uplink transmission.

Second Embodiment
The second embodiment of the present invention will be described below. The present embodiment describes a method for selecting an uplink component carrier that can transmit a random access channel at the earliest timing after transmission becomes possible. 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 the present embodiment will be described with reference to FIG. In FIG. 4, the process until the uplink control channel transmission subframe validity period ends and the release of the uplink control channel transmission setting is the same as that of the first embodiment, and therefore the description thereof is omitted.

  The mobile station apparatus 1 is configured to transmit a plurality of uplink component carriers (UL_CC1) configured to transmit the random access channel after the end of the uplink control channel transmission subframe validity period (after the uplink control channel transmission subframe (312)). And UL_CC2), select the uplink component carrier that can transmit the random access channel earliest (that is, the random access transmission subframe is allocated earliest). By using such an uplink component carrier selection method, the mobile station apparatus 1 can transmit the random access channel at the highest speed, so the delay time until the uplink transmission is actually started is realized. It can be the shortest.

  In FIG. 4, since the random access transmission subframe is allocated to UL_CC2 prior to UL_CC1, the 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 to perform uplink transmission in subframe (321). The determination as to whether or not the mobile station apparatus 1 transmits uplink data using a collision type radio resource can use the method described in the first embodiment.

  In addition, when the transmission timings of random access transmission subframes of different uplink component carriers are the same, the mobile station apparatus 1 is optimized based on the value of the path loss 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 is the best uplink in which the value of the path loss 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 for which the value of the path loss of the downlink component carrier to be paired becomes equal to or more than the predetermined threshold. Alternatively, one uplink component carrier may be randomly selected. The process of selecting the uplink component carrier of the mobile station device 1 in the second embodiment is shown in FIG.

  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), the uplink component carrier that can transmit the random access channel earliest is selected (step S202).

  When the transmission timings of random access transmission subframes of different uplink component carriers are the same (step S201: YES), the mobile station apparatus 1 performs path loss of the downlink component carrier that is 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, random access transmission component carrier selection is selected based on the timing which can transmit a random access channel. The selection processing of the uplink transmission method of the mobile station device 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 in a state in which the response (random access response) of the random access channel transmitted on the selected uplink component carrier is not received and waiting for retransmission of random access The case of reselecting uplink component carriers and performing random access will be described. The mobile station apparatus 1 does not reselect another uplink component carrier while waiting for the reception of the random access response. When the mobile station apparatus 1 changes uplink component carriers for which random access is to be performed, as shown in FIG. 4, it is effective when the frequency of allocation of random access transmission subframes is different. That is, in the example of FIG. 4, after the mobile station device 1 transmits the random access channel in the random access transmission subframe (422) of UL_CC2, the next transmission opportunity is two frames later. However, if it is possible to transmit in the random access transmission subframe (413) of UL_CC1 before the next transmission opportunity in UL_CC2, it becomes possible to shorten the time until the uplink transmission actually required. .

  The mobile station apparatus 1 determines whether to switch the uplink component carrier transmitting the random access channel, with the currently selected uplink component carrier (UL_CC2) and the uplink component carrier (UL_CC1) as a switching candidate. Are compared according to the following reselection conditions. Specifically, (1) the path loss value of the downlink component carrier paired with the uplink component carrier selected as the switching candidate is better than a predetermined threshold; (2) The uplink component carrier paired with the switching candidate and the pair The value of the path loss of the downlink component carrier is better than the value of the path loss of the downlink component carrier that is the pair of uplink component carriers being selected, (3) Random access transmission subframes of uplink component carriers that become switching candidates Cancel the current random access and transmit the random access channel if the time to the next random access transmission subframe of the uplink component carrier selected from the is more than or equal to the specified time Switch the uplink component carrier that.

  Further, when the collision type uplink data transmission subframe is assigned while waiting for a random access response (random access response) from the base station device 2, the mobile station device 1 is assigned to the assigned uplink component carrier. Regardless, uplink transmission in the collision type uplink data transmission subframe is not performed. The mobile station apparatus 1 can not receive the random access response from the base station apparatus 2 and is allocated uplink when the collision type uplink data transmission subframe is allocated while waiting for the next random access retransmission. Regardless of the link component carrier, the 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 executing random access with the dedicated preamble sequence assigned from the base station apparatus 2, priority is given to retransmission processing for random access, and uplink transmission in the collision type uplink data transmission subframe. Do not send. When the mobile station apparatus 1 cancels the random access retransmission and performs uplink transmission in the collision-type uplink data transmission subframe, the above-described conditions may be taken into consideration.

  FIG. 8 is a flowchart showing an example of uplink component carrier reselection processing of the mobile station device 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 on the uplink component carrier selected in FIGS. 5 and 7 and is waiting for the next random access retransmission, the random access transmission subframe is another uplink component. When allocated to the carrier, it is determined whether the uplink component carrier satisfies the reselection condition (step S301). The reselection conditions use any of the methods described above. Then, 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 ended. On the other hand, when the reselection condition is not satisfied (step S301: NO), the process is ended without performing uplink component carrier switching (step S303).

  Thus, in the second embodiment, the mobile station apparatus 1 selects an optimal uplink component carrier and performs uplink transmission when a plurality of uplink frequency bands (component carriers) are set. be able to. In addition, even when a plurality of methods can be selected to transmit new transmission data, an optimal transmission method can be selected. Also, the mobile station apparatus 1 can appropriately switch uplink component carriers that transmit a random access channel based on a predetermined condition. Selection and switching of optimal uplink component carriers, cancellation processing of random access and reconfiguration processing of transmission setting of random access channel are performed in RRC of the mobile station apparatus 1, and RRC to MAC (random access control unit 109) It is preferred that instructions be given. Further, the base station apparatus 2 uses the broadcast information or the RRC message for the condition that the mobile station apparatus 1 uses to select the optimal uplink component carrier and the condition that uses the transmission method of uplink transmission, Send to 1.

  As described above, when the uplink radio resource for transmitting uplink data is not allocated, the mobile station apparatus 1 may select the uplink component carrier that can transmit the random access channel earliest. Since it becomes possible, the transmission delay to uplink transmission can be reduced. In addition, 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 apparatus 1 can select one of the radio resource request and the collision type data transmission on the random access channel, the mobile station apparatus 1 selects the transmission method based on a predetermined condition. Thus, it is possible to perform uplink transmission with less delay without degrading the quality of uplink transmission. The base station apparatus 2 can cause the mobile station apparatus 1 to select the optimal transmission method by notifying the various information necessary for the mobile station apparatus 1 to perform the optimal uplink transmission.

Third Embodiment
The third embodiment of the present invention will be described below. In this embodiment, in addition to the first embodiment and the second embodiment, a method will be described in which more appropriate uplink transmission can be selected by adding the uplink transmission timing to the selection criterion. 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 describing a method of uplink transmission of the mobile station device 1 according to the third embodiment of the present invention. In FIG. 9, the same symbols are arranged for those already described in FIG. 4, and the description thereof is omitted. In FIG. 9, TA timer # 1 in UL_CC1 expires on the way, and UL_CC1 is in the 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, but since the transmission setting of the random access channel is set to a plurality of uplink component carriers, which uplink component It is necessary to determine if it is optimal to transmit the random access channel on the carrier. In particular, it is necessary to determine whether to transmit a random access channel on the uplink component carrier for which the TA timer has expired and the transmission timing is not adjusted.

  Thus, 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 a valid period will be described. That is, when selecting the 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 candidate. Similarly, when selecting the uplink component carrier based on the allocation of transmission subframes for random access as in the second embodiment, the mobile station apparatus 1 selects the uplink component carrier in the transmission timing non-adjusted state. Remove from the candidate. The mobile station apparatus 1 subsequently selects the optimum uplink component carrier and uplink transmission method using the first embodiment or the second embodiment for those other than the uplink component carrier removed from the selection candidate. . Since the mobile station apparatus 1 does not select the uplink component carrier in the transmission timing non-adjustment state, it performs a radio resource request without activating a new TA timer along with the uplink transmission. It is simplified.

  Also, regarding the uplink component carrier paired with the downlink component carrier for which the downlink component carrier reception quality has deteriorated and the downlink problem (Radio link problem) or downlink component carrier failure (CC failure) has occurred. Also, the mobile station apparatus 1 may be excluded from the selection candidates. Similarly, the mobile station apparatus 1 may be excluded from the selection candidate also for the uplink component carrier that makes a pair with the deactivated downlink component carrier. Alternatively, when the mobile station apparatus 1 selects an uplink component carrier to be paired with a deactivated downlink component carrier, the deactivated downlink component carrier is activated along with the uplink transmission, and In order to receive a 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 performing collision type data transmission specified by the uplink grant specifies the uplink component carrier in the transmission timing non-adjustment state, the mobile station apparatus 1 transmits the collision type data using the radio resource. Do not

  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 uplink data is not allocated, the mobile station apparatus 1 considers the presence / absence of adjustment of the transmission timing of the uplink component carrier, and thus, the best uplink. It is possible to select a link component carrier. Therefore, since the mobile station apparatus 1 can make a radio resource request without activating a new TA timer along with uplink transmission, control processing of the mobile station apparatus 1 is simplified.

  The embodiments described above are merely examples, and can be realized using various modifications and substitution examples. For example, the present uplink transmission scheme is applicable to both FDD (frequency division duplex) and TDD (time division duplex) communication systems. In each embodiment, although an example using path loss as the measurement value of the downlink component carrier has been described, other measurement values (SIR, SINR, RSRP, RSRQ, RSSI, BLER) may be used instead. It is also possible to use a plurality of these measured values in combination. Also, for convenience of explanation, although the mobile station apparatus 1 and the base station apparatus 2 of the embodiment have been described using a functional block diagram, one of the functions of each unit of the mobile station apparatus 1 and the base station apparatus 2 or these functions The program for realizing the control unit is recorded in a computer readable recording medium, and the computer system reads the program recorded in the recording medium and executes the program to control the mobile station apparatus 1 or the base station apparatus 2. You may do it. Here, the “computer system” includes an OS and hardware such as peripheral devices.

  The “computer readable recording medium” means a semiconductor medium (eg, RAM, non-volatile memory card etc.), an optical recording medium (eg DVD, MO, MD, CD, BD etc.), a magnetic recording medium (eg Portable media such as magnetic tapes, flexible disks, etc., and storage devices such as disk units incorporated in computer systems. Furthermore, "computer-readable recording medium" holds a program dynamically for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, the volatile memory in the computer system serving as the server or the client in that case, also includes the one that holds the program for a certain period of time. Further, the program may be for realizing a part of the functions described above, and further, the function described above may be realized in combination with a program already recorded in the computer system. .

  In addition, each functional block or features of the mobile station device 1 and the base station device 2 used in each of 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 features may be chiped individually, or some or all may be integrated and chipped. Further, the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible. In the case where an integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology, it is also possible to use an integrated circuit according to such technology.

  Although the embodiments of the present invention have been described in detail based on the specific examples, it is obvious that the spirit of the present invention and the claims are not limited to these specific examples. That is, the description of the present specification is for the purpose of illustration 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 and connects to the base station apparatus, and transmits uplink radio resources necessary for transmitting uplink data. A mobile station apparatus requesting the base station apparatus, which selects an uplink frequency band to make a radio resource request using a random access channel from any frequency band based on the first condition, It is characterized in that either the radio resource request using a random access channel or the transmission of uplink data by a common uplink radio resource with another mobile station apparatus is selected based on the second condition. I assume.

  Thus, the mobile station apparatus selects an uplink frequency band for making a radio resource request using a random access channel from any frequency band based on the first condition, and based on the second condition. Since the radio resource request using the random access channel or the transmission of the uplink data by the common uplink radio resource with another mobile station apparatus is selected, the quality of quality is determined based on the value of the path loss. Good uplink component carrier can be selected. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared.

  (2) Further, in the mobile station apparatus of the present invention, the transmission setting of the random access channel and the uplink frequency band corresponding to the downlink frequency band for which the reception quality is the best, The first condition is taken.

  As described above, the first condition is that the transmission setting of the random access channel and the uplink frequency band corresponding to the downlink frequency band with the best reception quality be the first condition. The station apparatus can select a good quality uplink component carrier based on the value of the path loss. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared.

  (3) Further, in the mobile station apparatus according to the present invention, it is preferable that the transmission setting of the random access channel is performed, and that the frequency band of the uplink capable of transmitting the random access channel at the earliest. And the condition.

  As described above, the first condition is that the transmission setting of the random access channel and the uplink frequency band that can transmit the random access channel earliest are the first condition. Since it is possible to transmit the random access channel at the fastest, it is possible to minimize the delay time until uplink transmission is actually started.

  (4) Also, the mobile station apparatus according to the present invention has the transmission quality of the random access channel and the highest reception quality among the uplink frequency bands that can transmit the random access channel earliest. The first condition is that the uplink frequency band corresponds to a certain downlink frequency band.

  Thus, the transmission setting of the random access channel is made, and among the uplink frequency bands that can transmit the random access channel most quickly, it corresponds to the downlink frequency band for which the reception quality is the best. Since the first condition is that it is an uplink frequency band, the mobile station apparatus can select a high quality uplink component carrier based on the value of path loss. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared. Also, since the mobile station apparatus can transmit the random access channel at the fastest, the delay time until the uplink transmission is actually started can be minimized.

  (5) Further, the mobile station apparatus according to the present invention is characterized in that the first condition includes that uplink transmission timing with the base station apparatus is adjusted.

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

  (6) Further, in the mobile station apparatus according to the present invention, in the uplink frequency band selected based on the first condition, a common uplink radio resource with another mobile station apparatus is: When allocated before the random access channel, the transmission of uplink data by the uplink radio resource is selected, while the common uplink radio resource with other mobile station apparatuses is random access When not allocated prior to the channel, the second condition is to select a radio resource request using a random access channel.

  Thus, for the uplink frequency band selected based on the first condition, a common uplink radio resource with another mobile station apparatus is allocated prior to the random access channel. In the case where the transmission of uplink data by the uplink radio resource is selected, the common uplink radio resource with other mobile station apparatuses is not allocated prior to the random access channel. Since it selects the radio | wireless resource request | requirement using a random access channel, it becomes possible to perform uplink transmission with little delay, without reducing the quality of uplink transmission.

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

  As described above, the uplink frequency band corresponding to the downlink frequency band in which the reception quality satisfies the predetermined threshold, and the uplink frequency other than the uplink frequency band selected based on the first condition When the uplink radio resources common to other mobile station apparatuses are allocated to the band prior to the random access channel allocated to the selected uplink frequency band, The uplink frequency band corresponding to the downlink frequency band in which the reception quality satisfies the predetermined threshold while selecting uplink data transmission by the uplink radio resource, based on the first condition For uplink frequency bands other than the selected uplink frequency band, uplink radio resources shared with other mobile station apparatuses are used. If the radio source 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, so that uplink transmission It is possible to perform uplink transmission with less delay without degrading the quality.

  (8) Further, the base station apparatus of the present invention sets the first condition and the second condition individually for the mobile station apparatus according to any one of the above (1) to (7). It is characterized by

  As described above, since the first condition and the second condition are individually set for the mobile station apparatus according to any one of the above (1) to (7), the mobile station apparatus can set the value of the path loss to Based on the quality, it is possible to select an uplink component carrier. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared.

  (9) Further, in the communication system according to the present invention, a plurality of frequency bands are aggregated to connect a base station apparatus and a mobile station apparatus, and the mobile station apparatus transmits uplink data necessary for transmitting uplink data. A communication system for requesting a radio resource from the base station apparatus, wherein the base station apparatus individually sets a first condition and a second condition for the mobile station apparatus, and the mobile station The apparatus selects an uplink frequency band for making a radio resource request using a random access channel from any frequency band based on the first condition, and selects a random access channel based on the second condition. It is characterized in that either the used radio resource request or the transmission of uplink data by the common uplink radio resource with another mobile station apparatus is selected.

  Thus, the mobile station apparatus selects an uplink frequency band for making a radio resource request using a random access channel from any frequency band based on the first condition, and based on the second condition. Since the radio resource request using the random access channel or the transmission of the uplink data by the common uplink radio resource with another mobile station apparatus is selected, the quality of quality is determined based on the value of the path loss. Good uplink component carrier can be selected. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared.

  (10) Further, 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 for which the reception quality is the best are the above. The first condition is taken.

  As described above, the first condition is that the transmission setting of the random access channel and the uplink frequency band corresponding to the downlink frequency band with the best reception quality be the first condition. The station apparatus can select a good quality uplink component carrier based on the value of the path loss. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared.

  (11) Further, in the communication system according to the present invention, it is preferable that the transmission setting of the random access channel is made, and that the first frequency band is an uplink frequency band that can transmit the random access channel most quickly. It is a condition.

  As described above, the first condition is that the transmission setting of the random access channel and the uplink frequency band that can transmit the random access channel earliest are the first condition. Since it is possible to transmit the random access channel at the fastest, it is possible to minimize the delay time until uplink transmission is actually started.

  (12) Also, in the communication system of the present invention, the transmission setting of the random access channel is set, and the reception quality is the best among the uplink frequency bands that can transmit the random access channel earliest. The first condition is the uplink frequency band corresponding to the downlink frequency band.

  Thus, the transmission setting of the random access channel is made, and among the uplink frequency bands that can transmit the random access channel most quickly, it corresponds to the downlink frequency band for which the reception quality is the best. Since the first condition is that it is an uplink frequency band, the mobile station apparatus can select a high quality uplink component carrier based on the value of path loss. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared. Also, since the mobile station apparatus can transmit the random access channel at the fastest, the delay time until the uplink transmission is actually started can be minimized.

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

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

  (14) Further, in the communication system according to the present invention, in the uplink frequency band selected based on the first condition, a common uplink radio resource with another mobile station apparatus is random. When allocated before the access channel, the transmission of uplink data by the uplink radio resource is selected, while the uplink radio resource common to other mobile station apparatuses is a random access channel If not allocated earlier, selecting the radio resource request using a random access channel is the second condition.

  Thus, for the uplink frequency band selected based on the first condition, a common uplink radio resource with another mobile station apparatus is allocated prior to the random access channel. In the case where the transmission of uplink data by the uplink radio resource is selected, the common uplink radio resource with other mobile station apparatuses is not allocated prior to the random access channel. Since the radio resource request using the random access channel is selected, the mobile station apparatus can perform uplink transmission with less delay without degrading the quality of uplink transmission.

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

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

  (16) Further, according to 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 mobile station apparatus needs to transmit uplink data. A communication method for requesting a radio resource from the base station apparatus, the base station apparatus individually setting a first condition and a second condition for the mobile station apparatus, and In the mobile station apparatus, based on the first condition, selecting an uplink frequency band for making a radio resource request using a random access channel from any frequency band, and based on the second condition, Either a radio resource request using a random access channel or transmission of uplink data by a common uplink radio resource with another mobile station apparatus Characterized in that it comprises at least a step of selecting and the.

  Thus, the mobile station apparatus selects an uplink frequency band for making a radio resource request using a random access channel from any frequency band based on the first condition; On the basis of the value of path loss, one of radio resource request using a random access channel and transmission of uplink data by a common uplink radio resource with another mobile station apparatus is selected. It is possible to select a high quality uplink component carrier. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared.

  (17) Further, the integrated circuit of the present invention is an integrated circuit which causes the mobile station apparatus to exhibit a plurality of functions by being mounted on the mobile station apparatus, and a plurality of frequency bands are aggregated to form a base station apparatus. Random access from any frequency band based on the first condition and the function of connecting to the base station, the function of requesting the base station apparatus the uplink radio resources necessary to transmit uplink data, and the first condition A function of selecting an uplink frequency band for making a radio resource request using a channel and a common uplink between a radio resource request using a random access channel or another mobile station apparatus based on a second condition And a function of causing the mobile station apparatus to perform a series of functions including a function of selecting any one of uplink data transmission by a link radio resource. To.

  Thus, based on the first condition, the mobile station apparatus selects an uplink frequency band for making a radio resource request using a random access channel from any frequency band, and a second condition. On the basis of the value of path loss, one of radio resource request using a random access channel and transmission of uplink data by a common uplink radio resource with another mobile station apparatus is selected. It is possible to select a high quality uplink component carrier. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared.

  (18) Further, the control program of the mobile station apparatus according to 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 to the base station A control program of a mobile station apparatus requesting the apparatus, the process of requesting the base station apparatus for an uplink radio resource necessary for transmitting uplink data, and based on a first condition A radio resource request using a random access channel from any frequency band, and a radio resource request using another random access channel or another radio resource request based on the second condition. Selecting any one of uplink data transmission with a common uplink radio resource with the mobile station apparatus The process of communication, characterized by being readable and executable on command of the computer.

  Thus, based on the first condition, the mobile station apparatus selects an uplink frequency band for making a radio resource request using a random access channel from any frequency band, and a second condition. On the basis of the value of path loss, one of radio resource request using a random access channel and transmission of uplink data by a common uplink radio resource with another mobile station apparatus is selected. It is possible to select a high quality uplink component carrier. Moreover, the success probability of the radio | wireless resource request | requirement improves, and reduction of transmission power and reduction of a transmission delay can be implement | achieved simultaneously. In addition, this method also has the advantage that control of the mobile station apparatus is simplified since only the path loss values are compared.

  In another aspect of the present invention, (19) a mobile station apparatus of the present invention is a mobile station apparatus connected to a base station apparatus using a plurality of cells, and using the RRC message from the base station apparatus Receiving first information and second information transmitted for each mobile station apparatus, and selecting a first cell from the plurality of cells based on the first information and the second information; In the first cell, uplink radio resources necessary for transmitting uplink data are requested.

  (20) Further, 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, for transmitting uplink data from the plurality of cells to the mobile station apparatus. The first information and the second information used to select the first cell used for the required uplink radio resource request are transmitted using the RRC message for each mobile station apparatus. I assume.

  (21) Further, a processing method in a mobile station apparatus according to the present invention is a processing method in a mobile station apparatus connected to a base station apparatus using a plurality of cells, wherein the movement from the base station apparatus is performed using an RRC message. Receiving first information and second information transmitted for each station apparatus, and selecting a first cell from the plurality of cells based on the first information and the second information; It is characterized in that uplink radio resources necessary for transmission of uplink data are requested in one cell.

  (22) Further, the processing apparatus according to the present invention is a processing apparatus mounted on a mobile station apparatus connected to a base station apparatus using a plurality of cells, which comprises an RRC message from the base station apparatus to the mobile station Receiving first information and second information transmitted for each device; selecting a first cell from the plurality of cells based on the first information and the second information; The mobile station apparatus is caused to execute a processing method of requesting uplink radio resources necessary for transmission of uplink data in the cell of

  (23) Further, a base station apparatus according to the present invention is a processing method in a base station apparatus connected to a mobile station apparatus using a plurality of cells, wherein uplink data from the plurality of cells is transmitted to the mobile station apparatus. Transmitting the first information and the second information used to select the first cell used for the request of the uplink radio resource necessary for the transmission of each mobile station apparatus using an RRC message It is characterized by

  (24) Further, the processing apparatus of the present invention is a processing apparatus mounted on a base station apparatus connected to a mobile station apparatus using a plurality of cells, wherein the mobile station apparatus is uplinked from the plurality of cells. The first information and the second information used for selecting the first cell used for the request of 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

11 to 13 Transmitters 21 to 23 Receiver 1 Mobile station 2 Base station 101 Receiver 103 Demodulator 105 Demodulator 107 Measurement processor 109 Random access control unit 111 Code unit 113 Modulation unit 115 Transmitter 117 Control unit 119 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 (1)

A mobile station apparatus that communicates with a base station apparatus,
Receiving the first information by an RRC message transmitted from the base station apparatus for each of the mobile station apparatuses;
When the transmission setting of the uplink control channel used for radio resource request is released, it performs radio resource request by the random access steel Yaneru in the first cell,
The first cell is a cell in which transmission setting for random access is individually set among a plurality of cells set in the mobile station apparatus, and is selected based on the first information. Mobile station equipment to be.

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