JP2011223479A - Mobile station apparatus, base station apparatus, wireless communication system, wireless communication method, and integrated circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide effective uplink data transmission of a conflict type.SOLUTION: A base station apparatus allocates a conflict type of uplink radio resource to mobile station apparatuses, and generates information indicating the allocation of the conflict type of uplink radio resource to transmit it to the mobile station apparatuses. If each of the mobile station apparatuses receives the information indicating the allocation of the conflict type of uplink radio resource, it calculates a transmission power and determines, based on the calculated transmission power, whether to transmit data by use of the conflict type of uplink radio resource.

Description

  The present invention relates to a base station device, a mobile station device, and a radio communication system, and more specifically, a mobile station device, a base station device, a radio communication system, a radio communication method, and an operation at the time of contention-type uplink data transmission The present invention relates to an integrated circuit.

  In the 3rd Generation Partnership Project (3GPP), the W-CDMA system is standardized as a third generation cellular mobile communication system, and services are started sequentially. In addition, HSDPA with higher communication speed has also been standardized and the service has started.

  On the other hand, 3GPP is also standardizing the evolution of third generation radio access (Evolved Universal Terrestrial Radio Access; hereinafter referred to as “EUTRA”). As a downlink communication system of EUTRA, an OFDM (Orthogonal Frequency Division Multiplexing) system that is resistant to multipath interference and suitable for high-speed transmission is adopted. Further, as an uplink communication scheme, a single carrier frequency division multiplexing SC-FDMA that can reduce the peak power to average power ratio (PAPR) of a transmission signal in consideration of the cost and power consumption of the mobile station apparatus. (Single Carrier-Frequency Division Multiple Access) DFT (Discrete Fourier Transform) -spread OFDM system is adopted.

  In 3GPP, discussion of Advanced-EUTRA, which is a further evolution of EUTRA, has also started. In Advanced-EUTRA, it is assumed that communication at a maximum transmission rate of 1 Gbps or higher and 500 Mbps or higher of the uplink is performed using a bandwidth of up to 100 MHz bandwidth in the uplink and downlink.

  In Advanced-EUTRA, it is considered that a 100 MHz band is realized by bundling a plurality of 20 MHz bands of EUTRA so that EUTRA mobile station apparatuses can be accommodated. In Advanced-EUTRA, one band of 20 MHz or less of EUTRA is called a component carrier (Component Carrier: CC) (Non-Patent Document 1).

  Further, in Advanced-EUTRA, there is a problem of improving the processing time (delay time) that is spent until connection is made in EUTRA and user data is transmitted.

  In Non-Patent Document 2, since a radio resource request using a radio resource request signal (scheduling request) takes time until data transmission, the mobile station apparatus maintaining uplink synchronization with the base station apparatus On the other hand, the base station apparatus newly allocates a common contention type (collision type) uplink radio resource between the mobile station apparatuses, and the mobile station apparatus with the data to be transmitted is common contention type uplink between the mobile station apparatuses. A contention-type uplink data transmission method has been proposed in which user data transmission delay time is reduced by transmitting data using radio resources.

3GPP TR (Technical Specification) 36.814, V1.00 (2009-03), Evolved Universal Terrestrial Radio Access (E-UTRA) Radio Resource Control (RRC) Protocol specification R2-093812, Ericsson, “Contention based uplink transmission”, 3GPP RAN WG2 # 66bis, Los Angeles, USA, 29th June-03rd July, 2009 3GPP TS (Technical Specification) 36.300, V8.70 (2009-03), Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN), Overall description Stage2

  In Advanced-EUTRA, uplink data transmission allocated to each mobile station apparatus is subjected to transmission power control. The transmission power from the mobile station apparatus becomes interference power with respect to the base station apparatus in the adjacent cell and affects the data transmission of the mobile station apparatus in the adjacent cell, so that the influence of the interference power is reduced by transmission power control. To be done. However, even in the competitive uplink data transmission proposed in Non-Patent Document 2, transmission power control is assumed, but when a plurality of mobile station apparatuses compete and transmit data to the same radio resource, The influence of the interference power on the data transmission of the mobile station apparatus in the adjacent cell is large, and there is a problem that the throughput of the adjacent cell is lowered.

  The present invention has been made in view of such circumstances, and a mobile station apparatus, a base station apparatus, a radio communication system, and a mobile station apparatus capable of efficient data transmission with less interference with respect to competitive uplink data transmission, An object is to provide a wireless communication method and an integrated circuit.

  (1) In order to achieve the above object, the present invention takes the following measures. That is, the radio communication system of the present invention is a radio communication system that performs communication between a base station apparatus and a plurality of mobile station apparatuses, and the base station apparatus allocates a competitive uplink radio resource to the mobile station apparatus. Information indicating the contention type uplink radio resource allocation is transmitted to the mobile station device, and the mobile station device receives the information indicating the contention type uplink radio resource allocation, and When there is no allocated uplink radio resource and there is data to be transmitted, a transmission power value of data to be transmitted by the contention type uplink radio resource is calculated, and the contention type uplink is determined according to the transmission power value. It is characterized by determining whether or not to transmit data using radio resources.

  (2) Moreover, in the radio | wireless communications system of this invention, the said mobile station apparatus transmits the said data, when the said transmission power value is below a predetermined threshold value.

  (3) Further, in the wireless communication system of the present invention, the wireless communication system performs communication between a base station apparatus and a plurality of mobile station apparatuses, wherein the base station apparatus communicates with the mobile station apparatus by a competitive uplink radio. Resources are allocated, and information indicating the contention-type uplink radio resource allocation is transmitted to the mobile station device, and the mobile station device receives information indicating the contention-type uplink radio resource allocation, and the mobile station When there is no uplink radio resource allocated to each device and there is data to be transmitted, it is determined whether to transmit data using the contention-type uplink radio resource according to the downlink radio channel state It is characterized by that.

  (4) In the radio communication system of the present invention, the mobile station apparatus transmits the data when the downlink radio channel condition is good.

  (5) A mobile station apparatus according to the present invention is a mobile station apparatus that communicates with a base station apparatus, receives information indicating contention-type uplink radio resource allocation from the base station apparatus, and allocates each mobile station apparatus individually When there is no transmitted uplink radio resource and there is data to be transmitted, a transmission power value of data to be transmitted with the contention-type uplink radio resource is calculated, and the contention-type uplink radio is calculated according to the transmission power value. It is characterized by determining whether or not to transmit data using resources.

  (6) A mobile station apparatus according to the present invention is a mobile station apparatus that communicates with a base station apparatus, receives information indicating contention-type uplink radio resource allocation from the base station apparatus, If there is no uplink radio resource allocated to the data and there is data to be transmitted, it is determined whether to transmit data using the contention-type uplink radio resource according to a downlink radio channel state. It is a feature.

  (7) A base station apparatus of the present invention is a base station apparatus that performs communication with a plurality of mobile station apparatuses and allocates a competitive uplink radio resource for data transmission of the mobile station apparatus, When there is an empty radio resource in the uplink shared channel PUSCH adjacent to the link control channel PUCCH, or when there is an empty radio resource state in the adjacent radio resource of the contention-type uplink radio resource to be allocated, the contention-type uplink It is characterized by allocating radio resources for data transmission.

  (8) A base station apparatus according to the present invention is a base station apparatus that performs communication with a plurality of mobile station apparatuses and allocates a competitive uplink radio resource for data transmission of the mobile station apparatus. The radio resource area for the contention-type uplink data transmission is allocated in the radio resource area of the random access channel.

  (9) The mobile station apparatus of the present invention is characterized in that data is transmitted to a radio resource for contention type uplink data transmission allocated in a radio resource area of the random access channel.

  (10) The mobile station apparatus of the present invention is configured such that when a radio resource for contention type uplink data transmission is allocated both inside and outside the radio resource area of the random access channel, the data transmission power value or Data is transmitted by selecting a radio resource outside or within the area according to a radio propagation path condition.

  (11) A mobile station apparatus according to the present invention is a mobile station apparatus that communicates with a base station apparatus, and receives information indicating contention-type uplink radio resource allocation simultaneously on a plurality of component carriers from the base station apparatus, When there is no uplink radio resource allocated to each mobile station apparatus and there is data to be transmitted, a transmission power value of data to be transmitted with the contention-type uplink radio resource for each component is calculated, and transmission for each component is performed. It is characterized by determining which component carrier's contention-type uplink radio resource is to be used according to the power value.

  (12) Moreover, the radio communication method of the present invention is a radio communication method applied to a radio communication system that performs communication between a base station apparatus and a plurality of mobile station apparatuses, and in the base station apparatus, the mobile station Allocating contention-type uplink radio resources to a device; transmitting information indicating assignment of the contention-type uplink radio resources to the mobile station device; and the contention-type uplink in the mobile station device. A step of receiving information indicating radio resource allocation, and transmission of data to be transmitted using the contention-type uplink radio resource when there is no uplink radio resource allocated to each mobile station apparatus and there is data to be transmitted. Calculating a power value; and determining whether to transmit the data using the contention-type uplink radio resource according to the transmission power value. It is characterized in that it comprises at least a step of constant.

  (13) The radio communication method of the present invention is a radio communication method applied to a radio communication system that performs communication between a base station apparatus and a plurality of mobile station apparatuses, wherein the mobile station apparatus Allocating contention-type uplink radio resources to a station device; transmitting information indicating assignment of the contention-type uplink radio resources to the mobile station device; and The step of receiving information indicating the allocation of link radio resources, and when there is no uplink radio resource allocated to each mobile station device and there is data to transmit, the contention depends on the downlink radio channel conditions The method includes at least a step of determining whether to transmit the data using a type uplink radio resource.

  (14) In addition, the radio communication method of the present invention is applied to a base station apparatus that performs communication with a plurality of mobile station apparatuses and allocates competitive uplink radio resources for data transmission of the mobile station apparatus. A wireless communication method comprising: allocating at least a radio resource for contention-type uplink data transmission in a radio resource region of a random access channel.

  (15) An integrated circuit according to the present invention is an integrated circuit applied to a radio communication system that performs communication between a base station apparatus and a plurality of mobile station apparatuses. In the mobile station apparatus, a competitive uplink is provided. When there is no uplink radio resource allocated to each mobile station apparatus and there is data to be transmitted, and means for receiving information indicating radio resource allocation, transmission of data to be transmitted using the contention-type uplink radio resource It is characterized by comprising means for calculating a power value and means for determining whether or not to transmit the data using the contention-type uplink radio resource according to the transmission power value.

  (16) An integrated circuit according to the present invention is an integrated circuit applied to a radio communication system that performs communication between a base station apparatus and a plurality of mobile station apparatuses. In the mobile station apparatus, a competitive uplink is provided. When there is no uplink radio resource allocated to each mobile station device and there is data to be transmitted, and the means for receiving information indicating radio resource allocation, the contention type It is characterized by having a means to determine whether the said data is transmitted with an uplink radio | wireless resource.

  (17) Further, the integrated circuit of the present invention is applied to a base station apparatus that performs communication with a plurality of mobile station apparatuses and allocates competitive uplink radio resources for data transmission of the mobile station apparatus. An integrated circuit, characterized in that the base station apparatus has means for allocating radio resources for contention-type uplink data transmission in a radio resource area of a random access channel.

  Advantageous Effects of Invention According to the present invention, efficient competitive uplink data transmission can be performed without causing interference to mobile station apparatuses in adjacent cells.

It is a figure which shows the channel structure in EUTRA. It is a figure which shows the structure of the uplink in EUTRA. It is explanatory drawing about the component carrier of the uplink in Advanced-EUTRA. It is explanatory drawing about the component carrier of the downlink in Advanced-EUTRA. It is a figure which shows the structure of the mobile station apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of the base station apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the influence of the data transmission of a mobile station apparatus on an adjacent cell. It is a flowchart which shows the operation example of the base station apparatus which concerns on Embodiment 1 of this invention. 6 is a flowchart illustrating an operation example of the mobile station apparatus according to the first embodiment of the present invention. It is a flowchart which shows the operation example of the base station apparatus which concerns on Embodiment 2 of this invention. It is a flowchart which shows the operation example of the mobile station apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows the operation example which concerns on Embodiment 2 of this invention. It is a figure which shows the operation example which concerns on Embodiment 2 of this invention. It is a figure which shows the operation example which concerns on Embodiment 2 of this invention.

  As the EUTRA downlink, the OFDM system is adopted. In addition, a single carrier communication scheme of DFT-spread OFDM scheme is adopted as the uplink of EUTRA.

  FIG. 1 is a diagram illustrating a channel configuration in EUTRA. The downlink of EUTRA includes downlink pilot channel DPiCH (Downlink Pilot Channel), downlink synchronization channel DSCH (Downlink Synchronization Channel), downlink shared channel PDSCH (Physical Downlink Shared Channel), downlink control channel PDCCH (Physical Downlink Control Channel). ) And a broadcast channel PBCH (Physical Broadcast Channel).

  In the downlink synchronization channel DSCH, a signal for the mobile station apparatus to take downlink synchronization is transmitted. In downlink control channel PDCCH, allocation information of downlink shared channel PDSCH and uplink shared channel PUSCH to the mobile station apparatus is transmitted. On the downlink shared channel PDSCH, user data and control data are transmitted to the mobile station apparatus.

  The uplink of EUTRA includes uplink pilot channel UPiCH (Uplink Pilot Channel), random access channel RACH (Random Access Channel), uplink shared channel PUSCH (Physical Uplink Shared Channel), uplink control channel PUCCH (Physical Uplink Control Channel). It is comprised by. (Non Patent Literature 3)

  FIG. 2 is a diagram illustrating an uplink configuration in EUTRA. In FIG. 2, one block is composed of 12 subcarriers and 7 OFDM symbols. Then, one resource block is configured using two blocks. The time domain of one resource block is called a subframe, and one frame is composed of 10 subframes. The minimum unit of radio resources of the uplink shared channel PUSCH and the uplink control channel PUCCH is one resource block. On the uplink shared channel PUSCH, user data and control data of the mobile station apparatus are transmitted. In the uplink control channel PUCCH, scheduling is a response to data transmitted on the downlink shared channel PDSCH, downlink channel information (CQI: Channel Quality Indicator), or uplink radio resource (uplink shared channel PUSCH) request. A request (SR: Scheduling Request) is transmitted.

  In FIG. 2, one random access channel RACH is prepared in one subframe, and a large number of mobile station apparatuses, for example, mobile station apparatuses 1-1 to 1-3 use the random access channel RACH. The station apparatus 3-1 is accessed. The configuration (frequency position and time position) of the random access channel RACH is notified from the base station apparatus 3-1 to the mobile station apparatuses 1-1 to 1-3 as broadcast information. The random access channel RACH is periodically arranged, and the random access channel RACH, the uplink shared channel PUSCH region, and the uplink control channel PUCCH region are divided as illustrated. The random access channel RACH is configured using 6 resource blocks.

  In EUTRA, there are two methods of requesting uplink radio resources (uplink shared channel PUSCH): a method using the uplink control channel PUCCH and a method using the random access channel RACH. In the method using the uplink control channel PUCCH, the base station apparatus allocates an uplink control channel PUCCH at regular intervals for radio resource request purposes to each mobile station apparatus that is communicating and maintains uplink synchronization. In this method, the mobile station apparatus transmits a radio resource request signal to the allocated uplink control channel PUCCH when there is no radio resource allocation and there is data to be transmitted. A method using a random access channel RACH is performed by a mobile station device to which an uplink control channel PUCCH for requesting radio resources is not allocated or a mobile station device that does not maintain uplink synchronization, and performs random access to the base station device. This is a method for requesting a radio resource.

  Also, 3GPP has begun discussions on Advanced-EUTRA, a further evolution of EUTRA. In Advanced-EUTRA, it is assumed that communication is performed at a maximum transmission rate of 1 Gbps or more and 500 Mbps or more of the uplink using a band up to a maximum of 100 MHz bandwidth in the uplink and the downlink.

  FIG. 3 is an explanatory diagram of downlink component carriers in Advanced-EUTRA. FIG. 4 is an explanatory diagram of an uplink component carrier in Advanced-EUTRA.

  In Advanced-EUTRA, a 100 MHz band is realized by bundling a plurality of 20 MHz bands of EUTRA so that EUTRA mobile station apparatuses can be accommodated, and large-capacity data transmission is considered. In Advanced-EUTRA, one band of 20 MHz or less of EUTRA is called a component carrier (Component Carrier: CC) (Non-Patent Document 1).

The base station apparatus allocates one or more component carriers that meet the communication capability and communication conditions of the mobile station apparatus from among a plurality of component carriers, and the mobile station apparatus transmits and receives data using the allocated component carrier.

  Further, in Advanced-EUTRA, there is a problem of improving the processing time (delay time) that is spent until connection is made in EUTRA and user data is transmitted.

  In Non-Patent Document 2, in the case of an uplink radio resource request signal (scheduling request) or an uplink radio resource request using a random access channel RACH, a considerable time is spent until uplink user data transmission. For this reason, the base station apparatus newly allocates a competitive (collision type) uplink radio resource block to the mobile station apparatus that is uplink-synchronized with the base station apparatus, and the allocation information is assigned on the downlink control channel PDCCH. To the mobile station apparatus, and the mobile station apparatus with the data to be transmitted transmits the data to the allocated contention-type uplink radio resource block, thereby reducing the delay time spent on user data transmission (collision type). ) A method for uplink data transmission has been proposed.

(Embodiment 1)
[Configuration explanation]
FIG. 5 is a diagram illustrating a configuration of the mobile station apparatus according to the embodiment of the present invention. The mobile station apparatuses 1-1 to 1-3 include a radio unit 101, a transmission processing unit 103, a reception processing unit 105, a transmission data control unit 107, a control data extraction unit 109, a control unit 111, and a scheduling unit 113 (on the mobile station device side). Scheduling unit). The scheduling unit 113 includes a UL scheduling unit 115, a control data creation unit 117, a control data analysis unit 119, and a competitive data scheduling unit 121.

  User data and control data are input to the transmission data control unit 107. The transmission data control unit 107 arranges each data in each channel of each component carrier and outputs it to the transmission processing unit 103 in accordance with an instruction from the control unit 111. The transmission processing unit 103 encodes and modulates data input from the transmission data control unit 107 according to an instruction from the control unit 111. The transmission processing unit 103 performs DFT (Discrete Fourier Transform) -IFFT (Inverse Fast Fourier Transform) processing on the modulated data, and inserts a CP (Cyclic prefix) after the processing. . The transmission processing unit 103 adjusts the data transmission timing from the transmission timing information passed from the scheduling unit 113 and outputs the data transmission timing to the radio unit 101. Radio section 101 up-converts the input data adjusted to the transmission power instructed from control section 111 to a radio frequency, and transmits the data from the transmission / reception antenna.

  The radio unit 101 down-converts the radio signal received from the transmission / reception antenna and outputs it to the reception processing signal unit 105. The reception processing unit 105 performs FFT (Fast Fourier Transform) processing, decoding, demodulation processing, and the like on the signal from the wireless unit 101 according to an instruction from the control unit 111, and the demodulated data is subjected to control data extraction unit Output to 109. Further, downlink radio propagation path characteristics are measured, and the measurement result is output to scheduling section 113. The control data extraction unit 109 performs mobile station apparatus identification information arranged on the downlink control channel PDCCH of each component carrier and common identification information (for example, contention type (collision type) uplink radio resource allocation between mobile station apparatuses. The received identification information, the identification information indicating the broadcast channel PBCH, etc.) to determine whether the data is addressed to the own mobile station device. The data of the link shared channel PDSCH is divided into control data and user data. Then, the control data extraction unit 109 passes control data to the scheduling unit 113 and passes user data to the upper layer. Further, the control data extraction unit 109 passes the uplink scheduling information (scheduling information for each mobile station device and contention type (collision type) data transmission scheduling information) included in the downlink control channel PDCCH to the scheduling unit 113. In addition, the control data extraction unit 109 passes the reception result for the received data to the scheduling unit 113. The control unit 111 controls the wireless unit 101, the transmission processing unit 103, the reception processing unit 105, the data control unit 107, and the control data extraction unit 109 based on the scheduling result from the scheduling unit 113.

  The scheduling unit 113 includes a UL scheduling unit 115, a control data creation unit 117, a control data analysis unit 119, and a competitive data scheduling unit 121. The control data creation unit 117 creates control data. The control data creation unit 117 creates control data such as a downlink data response (ACK / NACK) and downlink radio channel information (CQI) from the data reception result from the control data extraction unit 109. The control data analysis unit 119 analyzes the control data from the control data extraction unit 109 and outputs uplink data scheduling information to the UL scheduling unit 115 and the competitive data scheduling unit 121. Also, uplink transmission timing information is output to transmission processing section 103.

  The UL scheduling unit 115 calculates transmission power necessary for uplink scheduling and data transmission based on an instruction from an upper layer and scheduling information of uplink data, and outputs a scheduling result to the control unit 111. In addition, a result indicating whether or not the uplink shared channel PUSCH has been allocated to the contention type data scheduling unit is output. The contention-type data scheduling unit 121 calculates the transmission power required for contention-type uplink data transmission from the scheduling result of the UL scheduling unit 115 and the scheduling information of the contention-type uplink data, and calculates the contention-type uplink from the calculated transmission power value. Whether or not data transmission is possible is determined, and when transmission is possible, scheduling of contention type uplink data transmission is performed. Then, the scheduling result and transmission power are output to the control unit 111.

  FIG. 6 shows a configuration diagram of the base station apparatus 3-1 according to the embodiment of the present invention. The base station device 3-1 includes a data control unit 201, a transmission processing unit 203, a control unit 205, a reception processing unit 207, a control data extraction unit 209, a radio unit 211, and a scheduling unit 213 (base station device side scheduling unit). Is done. The scheduling unit 213 includes a DL scheduling unit 215, a UL scheduling unit 217, and a control data creation unit 219.

  The data control unit 201 transmits user data and control data according to an instruction from the control unit 205, and transmits control data to the downlink control channel PDCCH, downlink synchronization channel DSCH, downlink pilot channel DPiCH, broadcast channel PBCH, downlink of each component carrier. Mapping is performed on the shared channel PDSCH, and transmission data for each of the mobile station apparatuses 1-1 to 1-3 is mapped on the downlink shared channel PDSCH.

  In response to an instruction from the control unit 205, the transmission processing unit 203 performs encoding, data modulation, serial / parallel conversion of the input signal on the input data from the data control unit 201, OFDM such as IFFT conversion, CP insertion, and filtering. Signal processing is performed to generate an OFDM signal. The radio unit 213 up-converts the data modulated by OFDM according to an instruction from the control unit 205 to a radio frequency, and transmits the radio frequency to the mobile station apparatus 1-1. Radio section 211 receives uplink data from mobile station apparatus 1-1, down-converts it to a baseband signal, and outputs the received data to reception processing section 207. The reception processing unit 207 performs demodulation processing in consideration of transmission processing performed in the mobile station apparatus 1-1 from the uplink scheduling information from the control unit 205, and demodulates data. Further, the reception processing unit 207 measures the radio channel characteristics from the uplink pilot channel UPiCH and outputs the measurement result to the scheduling unit 213. The uplink communication scheme is assumed to be a single carrier scheme such as DFT-spread OFDM, but may be a multicarrier scheme such as the OFDM scheme.

  In response to an instruction from the control unit 205, the control data extraction unit 209 confirms the correctness of the received data and notifies the scheduling unit 205 of the confirmation result. If the received data is correct, the received data is separated into user data and control data. The control unit 205 controls the data control unit 201, the transmission processing unit 203, the reception processing unit 207, the control data extraction unit 209, and the radio unit 211 based on the scheduling result from the scheduling unit 213.

  The scheduling unit 213 includes a DL scheduling unit 215 that performs downlink scheduling, a UL scheduling unit 217 that performs uplink scheduling, and a control data creation unit 219. The DL scheduling unit 215 downlinks the downlink radio propagation path information notified from the mobile station apparatus 1-1, the data information of each user notified from the higher layer, and the control data created by the control data creation unit 219. Scheduling for mapping user data and control data to each channel is performed, and the scheduling result is output to the control data creation unit 219 and the control unit 205.

  The UL scheduling unit 217 performs scheduling of user data on the uplink shared channel PUSCH based on the uplink radio channel estimation result from the reception processing unit 207 and the radio resource allocation request from each mobile station apparatus. Then, when scheduling to each mobile station device is completed and the radio resources allocated to the uplink shared channel PUSCH still remain, the UL scheduling unit 217 performs contention type (collision type) uplink data transmission scheduling. The scheduling result is output to the control data creation unit 219 and the control unit 205.

  The control data creation unit 219 creates control data arranged on the downlink control channel PDCCH and control data arranged on the downlink shared channel PDSCH based on the scheduling results from the DL scheduling unit 215 and the UL scheduling unit 217. . Control data such as a control message including scheduling information, an uplink data response (ACK / NACK), information on contention-type uplink data transmission transmitted on the broadcast channel PBCH and the downlink shared channel PDSCH, and the like are created. The generated control data is output to the data control unit 201.

[Description of operation]
Assume a wireless communication system as described in FIG. As shown in FIG. 1, the base station device 3-1 communicates with the plurality of mobile station devices 1-1, 1-2, and 1-3. A wireless communication system is also assumed in which the base station apparatus and mobile station apparatus described in FIGS. 3 and 4 perform communication using one or more component carriers.

  In data transmission from a mobile station apparatus performing transmission power control, the transmission power of a mobile station apparatus located far from the base station apparatus is considerably larger than the transmission power of a mobile station apparatus close to the base station apparatus. This is because the transmission power largely depends on the distance between the mobile station apparatus and the base station apparatus. Since the antenna of the mobile station apparatus is omnidirectional, the transmission radio wave from the mobile station apparatus reaches the adjacent base station apparatus other than the base station apparatus to communicate with when the transmission power is large. Therefore, the transmission power of the mobile station apparatus 1-1 located far from the base station apparatus 3-1 as shown in FIG. 7 becomes interference power for the base station apparatus 3-2 of the adjacent cell, and The data transmission of the mobile station apparatus 1-2 will be affected. However, it is possible to suppress the influence of this interference by exchanging transmission power information and interference information of the mobile station device between the base station devices.

  However, in competitive uplink data transmission, it is difficult to predict the interference power because it is not known which mobile station apparatus transmits. In addition, when a plurality of mobile station devices that are far from the base station device transmit data using the same competitive uplink radio resource, it becomes many times the normal transmission power, and data of mobile station devices in adjacent cells In addition to affecting transmission, interference also affects mobile station apparatuses that transmit data to adjacent radio resource blocks in the own cell.

  In the present embodiment, after calculating the transmission power value, the mobile station apparatus determines whether or not to perform data transmission to the competitive uplink radio resource from the calculated transmission power value. For example, if a certain threshold is provided and the transmission power calculated from the threshold is small, data transmission to the competitive uplink radio resource is performed. If the transmission power calculated from the threshold is large, the data to the competitive uplink radio resource is transmitted. Do not send. In this way, even when a plurality of mobile station apparatuses compete, the influence of interference on adjacent cells can be reduced.

Operations of the base station device 3-1 and the mobile station device 1-1 will be described.
FIG. 8 and FIG. 9 are flowcharts each showing an operation example of contention-type uplink data transmission between the base station device 3-1 and the mobile station device 1-1 according to the embodiment of the present invention.

  The base station device 3-1 communicates with the mobile station device 1-1 using one or more component carriers. In addition, the mobile station apparatus 1-1 is in an uplink synchronization state with the base station apparatus 3-1. The uplink synchronization state refers to a state in which the mobile station apparatus 1-1 sets the uplink transmission timing information from the base station apparatus 3-1, and the transmission timing information is valid. Also, the base station apparatus 3-1 performs scheduling of uplink radio resources in units of subframes, and notifies scheduling information using the downlink control channel PDCCH.

  The base station apparatus 3-1 allocates the radio resource of the uplink shared channel PUSCH to each mobile station apparatus. After the allocation, the base station device 3-1 checks whether or not the radio resources of the allocated uplink shared channel PUSCH still remain (step S101). When the radio resources of the uplink shared channel PUSCH to be allocated still remain, the base station device 3-1 assigns contention type (collision type) uplink radio resources to the uplink shared channel PUSCH (position of radio resources) , The number of radio resources) (step S102). Then, the base station apparatus 3-1 ends the scheduling of radio resource allocation for the subframe.

  The base station apparatus 3-1 creates control data including identification information indicating the competition type uplink radio resource allocation from the result of the competition type uplink radio resource allocation (step S103). The base station apparatus 3-1 transmits the control data created on the downlink control channel PDCCH (step S104).

  The mobile station apparatus 1-1 monitors the downlink control channel PDCCH in order to detect identification information indicating contention type (collision type) radio resource allocation. When the mobile station apparatus 1-1 detects control data including identification information indicating competitive uplink radio resource allocation and competitive uplink radio resource allocation information in the downlink control channel PDCCH, and acquires the allocation information (Step S201), it is confirmed whether or not competitive uplink data transmission is necessary (Step S202). If the mobile station apparatus 1-1 has transmission data in the transmission buffer, the mobile station apparatus does not have uplink radio resource allocation, and contention-type uplink data transmission is required, transmission necessary for contention-type uplink data transmission Power is calculated (step S203). Then, the mobile station device 1-1 compares the calculated transmission power value with the transmission power threshold value α (step S204). As a result of the comparison, if the transmission power value calculated from the threshold value α is large, the competitive uplink data transmission is canceled. If the transmission power value calculated from the threshold value α is small, a data creation process for contention-type uplink data transmission is performed from the allocation information (step S205). The mobile station apparatus 1-1 transmits data to the base station apparatus using the allocated competitive uplink radio resource (step S206). After transmitting the data, the mobile station apparatus 1-1 waits for a contention-type uplink data transmission response from the base station apparatus 3-1, and clears the buffer of the transmitted data when receiving an ACK (acknowledgement). . When NACK (Negative Acknowledgment) is received, the transmitted data is left in the buffer (S207).

  The mobile station apparatus 1-1 has no transmission data in the transmission buffer, or there is uplink radio resource allocation for each mobile station apparatus, and there is no need for competitive uplink data transmission, and the calculated transmission power value Is greater than the threshold value α, contention-type uplink data transmission is not performed. The base station apparatus 3-1 may notify the threshold value α as broadcast information, or may be determined in advance between the base station apparatus 3-1 and the mobile station apparatuses 1-1 to 1-3. . Further, the base station device 3-1 may individually notify the threshold α to the mobile station device 1-1. As the threshold α, a plurality of values may be notified for each component carrier. Note that the mobile station apparatus 1-1 first calculates the transmission power necessary for the competitive uplink data transmission, and compares the calculated transmission power value with the transmission power threshold value α. As a result, the transmission power calculated from the threshold value α is calculated. When the value is large, monitoring of the downlink control channel PDCCH including the identification information indicating the competition type radio resource allocation is stopped, and when the transmission power value calculated from the threshold value α is small, the identification information indicating the competition type radio resource allocation Control may be performed to monitor the downlink control channel PDCCH including

  In the present embodiment, an example is shown in which whether or not competitive uplink data transmission is possible is determined from the transmission power value, but the downlink radio propagation path state is measured, and the mobile station apparatus 1-1 competes from the measurement result. Whether or not the type uplink data transmission is possible may be determined. The mobile station apparatus 1-1 calculates the downlink radio propagation path state from the downlink path loss (Pathloss) or the downlink pilot channel received power (Reference Symbol Received Power: RSRP), and the downlink radio propagation path If the state is good, contention-type uplink data transmission is performed, and if the downlink radio channel state is bad, contention-type uplink data transmission is not performed.

  Note that the downlink radio channel condition is good means that the downlink path loss is small, the received power of the downlink pilot channel DPiCH is large, or the reception quality of the downlink pilot channel DPiCH is good. Point to. In addition, the state of the downlink radio propagation path is bad, such as a state in which the downlink path loss is large, the reception power of the downlink pilot channel DPiCH is small, or the reception quality of the downlink pilot channel DPiCH is bad. . Further, the calculated downlink radio channel condition may be compared with the downlink radio channel threshold. The base station apparatus 3-1 may notify the downlink radio channel threshold value as broadcast information, or is determined in advance between the base station apparatus 3-1 and the mobile station apparatuses 1-1 to 1-3. You can keep it. Further, the base station apparatus 3-1 may individually notify the mobile station apparatus 1-1 of the downlink radio channel threshold. If the downlink radio channel state is poor, the mobile station apparatus 1-1 stops monitoring the downlink control channel PDCCH including identification information indicating contention-type radio resource allocation, and the downlink radio channel When the state is good, control may be performed to monitor the downlink control channel PDCCH including identification information indicating contention-type radio resource allocation.

  Further, in Advanced-EUTRA, when transmitting a random access preamble to the random access channel RACH, the mobile station apparatus 1-1 selects a sequence group of a sequence used for generating a random access preamble according to a downlink path loss. However, a parameter for selecting a sequence group used at this time may be used as a threshold value. If this threshold value is used, the base station apparatus does not need to newly transmit threshold value information. That is, the mobile station apparatus 1-1 uses the threshold for classifying the sequence group according to the quality of the path loss when generating the random access preamble notified from the base station apparatus as the threshold for determining whether or not competitive uplink data transmission is possible. Also good.

  Further, the transmission power of the competitive uplink data transmission may be calculated by making it lower than the transmission power of the data transmission for each mobile station apparatus. If the transmission power of individual data transmission required for one resource block is P, the transmission power of competitive uplink data transmission required for one resource block is calculated as Pa (a is the base station apparatus) May be a value notified to the mobile station apparatus, or may be a value defined in advance.) By doing in this way, the influence of the interference to an adjacent cell can be reduced further.

  Further, the mobile station apparatus 1-1 uses the same sub-data as identification information indicating the competition type uplink radio resource allocation in the downlink control channels PDCCH of a plurality of component carriers and the control data including the competition type uplink radio resource allocation information. When the frame is detected and the allocation information is acquired, the transmission power of the transmission data in the competitive uplink radio resource of each component carrier is calculated, and which component carrier is determined according to the calculated transmission power value for each component carrier It may be determined whether or not to transmit data using the competitive uplink radio resource. That is, data transmission is performed using a competing uplink radio resource of a component carrier having the smallest transmission power value. In addition, depending on the downlink radio propagation path state, it may be determined which component carrier's competing uplink radio resource is used to transmit data. In this case, data transmission is performed using a competing uplink radio resource of a component carrier having the best downlink radio channel state.

  In this way, even when a plurality of mobile station apparatuses compete and transmit data in competitive uplink data transmission, it is possible to reduce the influence of interference on adjacent cells.

(Embodiment 2)
[Configuration explanation]
The configuration of the mobile station apparatus according to this embodiment is the same as that shown in FIG. The mobile station apparatuses 1-1 to 1-3 include a radio unit 101, a transmission processing unit 103, a reception processing unit 105, a transmission data control unit 107, a control data extraction unit 109, a control unit 111, and a scheduling unit 113 (on the mobile station device side). Scheduling unit). The scheduling unit 113 includes a UL scheduling unit 115, a control data creation unit 117, a control data analysis unit 119, and a competitive data scheduling unit 121.

  Since the operations of the wireless unit 101, the transmission processing unit 103, the reception processing unit 105, the transmission data control unit 107, the control data extraction unit 109, and the control unit 111 are the same as those described in the first embodiment, the description thereof will be omitted.

  The scheduling unit 113 includes a UL scheduling unit 115, a control data creation unit 117, a control data analysis unit 119, and a competitive data scheduling unit 121. The control data creation unit 117 creates control data. The control data creation unit 117 creates control data such as a downlink data response (ACK / NACK) and downlink radio channel information (CQI) from the data reception result from the control data extraction unit 109. The control data analysis unit 119 analyzes the control data from the control data extraction unit 109 and outputs uplink data scheduling information to the UL scheduling unit 115 and the competitive data scheduling unit 121. Also, uplink transmission timing information is output to transmission processing section 103.

  The UL scheduling unit 115 performs uplink scheduling based on an instruction from an upper layer and uplink data scheduling information, and outputs a scheduling result to the control unit 111. In addition, a result indicating whether or not the uplink shared channel PUSCH has been allocated to the contention type data scheduling unit is output. The contention type data scheduling unit 121 determines whether or not the contention type uplink data transmission is possible from the scheduling result of the UL scheduling unit 115 and the scheduling information of the contention type uplink data, and when the transmission is possible, the contention type uplink data transmission is performed. Scheduling. Then, the scheduling result and transmission power are output to the control unit 111.

  The configuration diagram of the base station apparatus 3-1 according to the present embodiment is the same as FIG. The base station device 3-1 includes a data control unit 201, a transmission processing unit 203, a control unit 205, a reception processing unit 207, a control data extraction unit 209, a radio unit 211, and a scheduling unit 213 (base station device side scheduling unit). Is done. The scheduling unit 213 includes a DL scheduling unit 215, a UL scheduling unit 217, and a control data creation unit 219.

  Since the operations of the data control unit 201, the transmission processing unit 203, the control unit 205, the reception processing unit 207, the control data extraction unit 209, and the wireless unit 211 are the same as those described in the first embodiment, a description thereof will be omitted.

  The scheduling unit 213 includes a DL scheduling unit 215 that performs downlink scheduling, a UL scheduling unit 217 that performs uplink scheduling, and a control data creation unit 219. The DL scheduling unit 215 downlinks the downlink radio propagation path information notified from the mobile station apparatus 1-1, the data information of each user notified from the higher layer, and the control data created by the control data creation unit 219. Scheduling for mapping user data and control data to each channel is performed, and the scheduling result is output to the control data creation unit 219 and the control unit 205.

  The UL scheduling unit 217 performs scheduling of user data on the uplink shared channel PUSCH based on the uplink radio channel estimation result from the reception processing unit 207 and the radio resource allocation request from each mobile station apparatus. Then, the UL scheduling unit 217 finishes scheduling to each mobile station apparatus, and when there are still radio resources allocated to the uplink shared channel PUSCH, the contention type (collision type) as described below Radio resource scheduling for uplink data transmission is performed, and the scheduling result is output to the control data creation unit 219 and the control unit 205.

  The control data creation unit 219 creates control data arranged on the downlink control channel PDCCH and control data arranged on the downlink shared channel PDSCH based on the scheduling results from the DL scheduling unit 215 and the UL scheduling unit 217. . Control data such as a control message including scheduling information, an uplink data response (ACK / NACK), information on contention-type uplink data transmission transmitted on the broadcast channel PBCH and the downlink shared channel PDSCH, and the like are created. The generated control data is output to the data control unit 201.

[Description of operation]
When random access preambles are transmitted simultaneously from a plurality of mobile station apparatuses, it becomes a large amount of power, and in order to reduce the influence of interference on adjacent radio resources (uplink shared channel PUSCH) and base station apparatus of adjacent cells, The base station apparatus arranges a random access channel at the same random access channel RACH position as the adjacent base station apparatus or arranges it near the uplink control channel PUCCH to reduce the influence on the uplink shared channel due to interference. I am doing so. Similarly, in the competitive type (collision type) data transmission, the influence of interference is similarly reduced by scheduling.

  In the present embodiment, when allocating a competitive uplink radio resource, the base station apparatus uses an empty radio resource (individual mobile station apparatus individual) in the uplink shared channel PUSCH adjacent to the uplink control channel PUCCH as shown in FIG. If there is a radio resource that is not allocated to the contention-type uplink radio resource, or there is a free radio resource in the adjacent radio resource of the contention-type uplink radio resource to be allocated as shown in FIG. In this case, contention-type uplink radio resources are allocated. By doing so, it is possible to prevent the data transmission of adjacent radio resources from being affected.

Operations of the base station device 3-1 and the mobile station device 1-1 will be described.
FIG. 10 and FIG. 11 are flowcharts each showing an operation example of contention type uplink data transmission between the base station device 3-1 and the mobile station device 1-1 according to the embodiment of the present invention.
The base station device 3-1 communicates with the mobile station device 1-1 using one or more component carriers. In addition, the mobile station apparatus 1-1 is in an uplink synchronization state with the base station apparatus 3-1. Note that the uplink synchronization state refers to a state in which the mobile station apparatus 1-1 receives uplink transmission timing correction information from the base station apparatus 3-1, and the transmission timing correction information is valid. Also, the base station apparatus 3-1 performs scheduling of uplink radio resources in units of subframes, and notifies scheduling information using the downlink control channel PDCCH.

  The base station apparatus 3-1 allocates the radio resource of the uplink shared channel PUSCH to each mobile station apparatus. After the allocation, the base station device 3-1 checks whether or not the radio resources of the allocated uplink shared channel PUSCH still remain (step S301). When the radio resources of the uplink shared channel PUSCH to be allocated still remain, the base station device 3-1 allocates the contention type (collision type) uplink radio resource to the uplink shared channel PUSCH (position of the radio resource, The number of radio resources etc. is performed (step S302). Note that the base station device 3-1 has radio resources adjacent to the contiguous uplink radio resource to be allocated as shown in FIG. 13 when there is an empty radio resource adjacent to the uplink control channel PUCCH as shown in FIG. 12. Allocate contention-type uplink radio resources when is in an empty state. And when the said conditions are not satisfy | filled, the base station apparatus 3-1 does not perform the competition type | mold uplink radio | wireless resource allocation of the sub-frame.

  The base station apparatus 3-1 creates control data including the identification information indicating the competitive uplink radio resource allocation and the competitive uplink radio resource allocation information from the result of the competitive uplink radio resource allocation. (Step S303). The base station device 3-1 transmits the control data created by the downlink control channel PDCCH (step S304).

  The mobile station apparatus 1-1 monitors the downlink control channel PDCCH in order to detect identification information indicating contention type (collision type) uplink radio resource allocation. When the mobile station apparatus 1-1 detects the identification information indicating the competitive uplink radio resource allocation in the downlink control channel PDCCH and acquires the allocation information (step S401), the mobile station apparatus 1-1 transmits It is confirmed whether there is transmission data in the buffer, there is no uplink radio resource allocation for each mobile station apparatus, and whether competitive uplink data transmission is necessary (step S402). The mobile station apparatus 1-1 confirms whether or not the contention type uplink data transmission is necessary. When the contention type uplink data transmission is necessary, the mobile station apparatus 1-1 determines the contention type uplink transmission data from the allocation information. (Step 403), and transmits the data created at the radio resource position of the allocated uplink shared channel PUSCH (step S404). After transmitting the data, the mobile station apparatus 1-1 waits for a contention-type uplink data transmission response from the base station apparatus 3-1, and clears the buffer of the transmitted data when receiving an ACK (acknowledgement). . When a NACK (Negative Acknowledgment) is received, the transmitted data is left in the buffer (S405).

  When there is no transmission data in the transmission buffer or there is uplink radio resource allocation for each mobile station apparatus and there is no need for competitive uplink data transmission, the mobile station apparatus 1-1 does not perform data transmission.

  Note that the base station apparatus 3-1 combines the assignment shown in FIG. 12 with the assignment shown in FIG. 13, and there is a free radio resource in the radio resource adjacent to the uplink control channel PUCCH as shown in FIG. When the competition type uplink radio resource is allocated, the competition type uplink radio resource may be allocated when there is a space in the adjacent radio resource. Also, the base station device 3-1 exchanges scheduling information regarding the competitive uplink radio resource with the adjacent base station device 3-2, and the radio resource allocated to each mobile station device from the scheduling result of the adjacent base station device The contention-type uplink radio resource may be allocated in consideration of the position and the contention-type uplink radio resource position. In other words, the contention-type uplink radio resource is allocated to the same position as the contention-type uplink radio resource allocated by the adjacent base station apparatus, or the position is a free radio resource in both the adjacent base station apparatus and the own base station apparatus. Contention-type uplink radio resources are allocated. By doing so, it is possible to reduce the influence of interference due to competitive uplink data transmission on individual data transmission of mobile station apparatuses belonging to both base station apparatuses.

  Further, the random access channel RACH is a contention-type radio resource in which it is not known when the mobile station apparatus uses the same as the contention-type uplink data transmission radio resource, and the base station apparatus allocates the random access channel RACH. Are often not used. However, the random access channel RACH is a radio resource necessary for a mobile station apparatus that is not uplink-synchronized with the base station apparatus to access the base station apparatus, and needs to be periodically arranged. In addition, the random access channel RACH is designed and arranged on the assumption that it is transmitted from a plurality of mobile station apparatuses and collides in the same manner as the competitive uplink data transmission radio resource. For this reason, contention-type uplink data transmission radio resources may be allocated in the radio resource area of the random access channel RACH. By doing so, interference is not caused to adjacent radio resources, and the radio resources of the random access channel RACH can be used effectively. In this case, since the random access channel is composed of 6 resource blocks, a maximum of 6 contention-type uplink radio resources can be created. When allocating the competitive uplink radio resource to the random access channel RACH, the identification information indicating the allocation of the competitive uplink radio resource may not be notified as long as it is determined in advance between the base station apparatus and the mobile station apparatus.

  In addition, when the contention type uplink radio resource is allocated to the normal uplink shared channel PUSCH region by combining the first embodiment and the second embodiment, the mobile station apparatus performs contention type uplink data according to the transmission power value. If it is determined whether or not to perform transmission and a competitive uplink radio resource is allocated to the random access channel RACH region, the competitive uplink data transmission may be performed regardless of the transmission power value. Also, when a competitive uplink radio resource is allocated to both the normal uplink shared channel PUSCH region and the random access channel RACH region, the mobile station apparatus uses which resource to compete for the transmission power value. It may be determined whether to perform type uplink data transmission. In this way, the mobile station apparatus far from the base station apparatus can perform competitive uplink data transmission.

  By doing so, even when a plurality of mobile station apparatuses compete and transmit data in competitive uplink data transmission, the influence of interference on adjacent cells is reduced, or adjacent radio resource blocks in the own cell The influence of interference can be suppressed even for a mobile station device that transmits data.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

  Further, for convenience of explanation, the mobile station device 1-1 and the base station device 3-1 of the embodiment have been described using functional block diagrams, but each part of the mobile station device 1-1 and the base station device 3-1 is described. Or a program for realizing a part of these functions is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read by a computer system and executed, thereby executing a mobile station apparatus or The base station apparatus may be controlled. The “computer system” here includes an OS and hardware such as peripheral devices.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” means that a program is dynamically held for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, it is intended to include those that hold a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client in that case. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system. .

  Each functional block used in each of the above embodiments may be realized as an LSI that is typically an integrated circuit. Each functional block may be individually formed into chips, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the design and the like within the scope of the present invention are also within the scope of the claims. include.

1-1 to 1-3 Mobile station apparatus 3-1, 3-2 Base station apparatus 101, 211 Radio section 103, 203 Transmission processing section 105, 207 Reception processing section 107, 201 Data control section 109, 209 Control data extraction section
111, 205 Control unit 113, 213 Scheduling unit

Claims (17)

A wireless communication system for performing communication between a base station device and a plurality of mobile station devices,
The base station apparatus allocates a competitive uplink radio resource to the mobile station apparatus, and transmits information indicating the competitive uplink radio resource allocation to the mobile station apparatus,
The mobile station apparatus receives the information indicating the contention-type uplink radio resource allocation, and when there is no uplink radio resource allocated to each mobile station apparatus and there is data to transmit, the contention-type uplink A wireless communication system, comprising: calculating a transmission power value of data to be transmitted with a radio resource, and determining whether to transmit data with the contention-type uplink radio resource according to the transmission power value. The wireless communication system according to claim 1,
The mobile station apparatus transmits the data when the transmission power value is a predetermined threshold value or less. A wireless communication system for performing communication between a base station device and a plurality of mobile station devices,
The base station apparatus allocates a competitive uplink radio resource to the mobile station apparatus, and transmits information indicating the competitive uplink radio resource allocation to the mobile station apparatus,
The mobile station apparatus receives the information indicating the contention-type uplink radio resource allocation, and when there is no uplink radio resource allocated to each mobile station apparatus and there is data to transmit, downlink radio propagation A radio communication system, characterized by determining whether or not to transmit data using the contention-type uplink radio resource according to a road condition. A wireless communication system according to claim 3,
The mobile station apparatus transmits the data when the downlink radio propagation path state is good. A mobile station device that communicates with a base station device,
When there is no uplink radio resource allocated to each mobile station device and there is data to transmit when receiving information indicating contention-type uplink radio resource assignment from the base station device, the contention-type uplink radio resource A mobile station apparatus, comprising: calculating a transmission power value of data to be transmitted in a step, and determining whether to transmit data using the contention-type uplink radio resource according to the transmission power value. A mobile station device that communicates with a base station device,
When receiving information indicating contention-type uplink radio resource assignment from the base station apparatus, and there is no uplink radio resource assigned to each mobile station apparatus and there is data to be transmitted, a downlink radio channel state And determining whether or not to transmit data using the contention-type uplink radio resource. A base station device that performs communication with a plurality of mobile station devices and allocates a competitive uplink radio resource for data transmission of the mobile station device,
When there is an empty radio resource in the uplink shared channel PUSCH adjacent to the uplink control channel PUCCH, or when there is an empty radio resource state in the adjacent radio resource of the competitive uplink radio resource to be allocated. A base station apparatus that allocates radio resources for link data transmission. A base station device that performs communication with a plurality of mobile station devices and allocates a competitive uplink radio resource for data transmission of the mobile station device,
A base station apparatus, wherein radio resources for contention type uplink data transmission are allocated in a radio resource area of a random access channel. The mobile station apparatus according to claim 8, wherein
A mobile station apparatus that transmits data to a radio resource for contention type uplink data transmission allocated in a radio resource area of the random access channel. The mobile station apparatus according to claim 8, wherein
When radio resources for contention-type uplink data transmission are allocated both inside and outside the radio resource area of the random access channel, depending on the data transmission power value or the radio propagation path status, the outside of the area A mobile station apparatus that transmits data by selecting any radio resource in the area. A mobile station device that communicates with a base station device,
When receiving information indicating contention-type uplink radio resource allocation simultaneously with a plurality of component carriers from the base station apparatus, there is no uplink radio resource allocated for each mobile station apparatus, and there is data to transmit, Calculate a transmission power value of data to be transmitted with a competing uplink radio resource for each component, and determine which component carrier to use the competing uplink radio resource according to the transmission power value for each component A mobile station apparatus characterized by the above. A wireless communication method applied to a wireless communication system that performs communication between a base station device and a plurality of mobile station devices,
In the base station apparatus, allocating a competitive uplink radio resource to the mobile station apparatus, and transmitting information indicating allocation of the competitive uplink radio resource to the mobile station apparatus;
In the mobile station apparatus, when receiving the information indicating the allocation of the contention-type uplink radio resource, and when there is no uplink radio resource allocated for each mobile station apparatus and there is data to transmit, At least a step of calculating a transmission power value of data to be transmitted with the contention type uplink radio resource, and at least a step of determining whether or not to transmit the data with the contention type uplink radio resource according to the transmission power value. A wireless communication method. A wireless communication method applied to a wireless communication system that performs communication between a base station device and a plurality of mobile station devices,
In the base station device, allocating a competitive uplink radio resource to the mobile station device, and transmitting information indicating allocation of the competitive uplink radio resource to the mobile station device;
The mobile station apparatus receives the information indicating the allocation of the contention-type uplink radio resource, and when there is no uplink radio resource allocated for each mobile station apparatus and there is data to transmit, A radio communication method comprising: at least a step of determining whether to transmit the data using the contention-type uplink radio resource according to a radio propagation path condition of a link. A radio communication method applied to a base station apparatus that performs communication with a plurality of mobile station apparatuses and allocates a competitive uplink radio resource for data transmission of the mobile station apparatus,
A radio communication method comprising at least a step of allocating the radio resource for contention type uplink data transmission in a radio resource area of a random access channel. An integrated circuit applied to a wireless communication system that performs communication between a base station device and a plurality of mobile station devices,
In the mobile station apparatus, when there is no uplink radio resource allocated to each mobile station apparatus and there is data to transmit, there is a means for receiving information indicating the allocation of a competitive uplink radio resource, and the contention Means for calculating a transmission power value of data to be transmitted with a type uplink radio resource, and means for determining whether to transmit the data with the contention type uplink radio resource according to the transmission power value. Characteristic integrated circuit. An integrated circuit applied to a wireless communication system that performs communication between a base station device and a plurality of mobile station devices,
In the mobile station apparatus, when there is no uplink radio resource allocated to each mobile station apparatus and there is data to transmit, there is a means for receiving information indicating allocation of a competitive uplink radio resource, and downlink data. An integrated circuit comprising: means for determining whether or not to transmit the data using the contention-type uplink radio resource according to a state of a radio propagation path. An integrated circuit that is applied to a base station device that performs communication with a plurality of mobile station devices and allocates a competitive uplink radio resource for data transmission of the mobile station device,
The integrated circuit comprising: means for allocating the contention-type uplink data transmission radio resource in a radio resource area of a random access channel in the base station apparatus.