JP2011142533A - Mobile station device, base station device, radio communication system, radio communication method and integrated circuit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow efficient uplink collision type data transmission. <P>SOLUTION: A base station device performs assignment of collision type radio resources to a mobile station device in a position near the base station device, and assignment of the collision type radio resource to a mobile station device in a position far from the base station device, creates each assignment information, uses different pieces of identification information to each assignment information to be transmitted to the mobile station device, and the mobile station device receives each identification information, and selects collision type radio resources suitable for a self-mobile station device by a downlink radio propagation path state to perform the collision type data transmission. <P>COPYRIGHT: (C)2011,JPO&INPIT

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 integrated circuit in operation at the time of collision type data transmission About.

  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 processing time (delay time) that is consumed when connection is made in EUTRA or 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 collision type (contention type) radio resource between the mobile station apparatuses, and the mobile station apparatus with data to be transmitted uses the common collision type radio resource between the mobile station apparatuses. Thus, there has been proposed a collision type data transmission method for reducing the delay time of user data transmission by transmitting data.

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

  However, there is no detailed description of uplink collision type data transmission proposed in Non-Patent Document 2, and a mobile station device located far from the base station device is a mobile station device located near the base station device. Compared to, the data capacity that can be transmitted in one resource block is small. Since the base station device does not know the position of the mobile station device, when allocating collision-type radio resources, the base station device must be set to a resource capacity that matches the distant mobile station device. As described above, there is a problem that the utilization efficiency of radio resource allocation is deteriorated by adjusting the resource capacity to the mobile station apparatus far away.

  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 radio communication method capable of performing efficient data transmission with respect to collision-type uplink data transmission 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 performs communication between a base station apparatus and a plurality of mobile station apparatuses, and one or more of the mobile station apparatuses are individually used for uplink data transmission from the base station apparatus. A radio communication system including a mobile station apparatus to which radio resource allocation is not performed, wherein the base station apparatus is common to the mobile station apparatus among mobile station apparatuses, and one or more uplink radio resources are allocated to the mobile station apparatus. And transmitting the information indicating the radio resource allocation to the mobile station apparatus, the mobile station apparatus receiving the information indicating the radio resource allocation, and the uplink radio allocated to each mobile station apparatus individually When there is no resource and there is data to transmit, a radio resource is selected from the allocated radio resources according to a downlink radio channel state, and It is characterized by transmitting the data by using the-option radio resources.

  (2) Further, in the radio communication system of the present invention, the base station apparatus creates a plurality of pieces of information indicating the radio resource allocation, and corresponds to a downlink radio channel state in the information indicating the radio resource allocation. When the identification information is added and transmitted to the mobile station apparatus, the mobile station apparatus monitors the identification information, detects the identification information, and receives information indicating the radio resource allocation, The radio resource indicated by the identification information is selected according to the radio propagation path state, and data is transmitted to the selected radio resource.

  (3) Further, in the radio communication system of the present invention, communication is performed between a base station apparatus and a plurality of mobile station apparatuses, and one or more of the mobile station apparatuses allocate radio resources for uplink data transmission. The base station apparatus notifies the mobile station apparatus of information related to the division of uplink radio resources that can be transmitted in common between the mobile station apparatuses. Further, one or more uplink radio resources common to the mobile station apparatuses are allocated, information indicating the radio resource allocation is transmitted to the mobile station apparatus, and the mobile station apparatus receives the information on the division And when the information which shows the said radio | wireless resource allocation is received, the said radio | wireless resource is divided | segmented based on the information regarding the said division | segmentation.

  (4) In the radio communication system of the present invention, when there is data to be transmitted, the mobile station apparatus selects a radio resource from the divided radio resources and transmits the data to the selected radio resource. It is characterized by that.

  (5) In the radio communication system of the present invention, the information related to the division of uplink radio resources that can be transmitted in common between the mobile station devices indicates the number of radio resources indicated by the radio resource allocation information. It is a feature.

  (6) Further, the base station apparatus of the present invention is a base that performs communication with a plurality of mobile station apparatuses including a mobile station apparatus to which radio resources are not allocated for one or more uplink data transmissions. A wireless communication apparatus that allocates one or more uplink radio resources corresponding to a downlink radio channel state to a plurality of mobile station apparatuses that are communicating with each other, Is transmitted to the mobile station apparatus.

  (7) A base station apparatus according to the present invention communicates with a plurality of mobile station apparatuses including a mobile station apparatus to which radio resources for one or more uplink data transmissions are not allocated Information on division of uplink radio resources that can be transmitted in common between mobile station apparatuses is notified to the mobile station apparatus, and one or more uplink radio resources common to the mobile station apparatuses are allocated. The mobile station apparatus transmits information indicating a position of the radio resource to the mobile station apparatus.

  (8) Moreover, the mobile station apparatus of the present invention is a mobile station apparatus that communicates with a base station apparatus, and indicates a position of one or more uplink radio resources that are common between the base station apparatus and the mobile station apparatus. When there is no uplink radio resource allocated to each mobile station device individually from the base station device and there is data to transmit, the allocated information is allocated according to the downlink radio channel condition. A radio resource is selected from radio resources, and data is transmitted using the selected radio resource.

  (9) A mobile station apparatus of the present invention is a mobile station apparatus that communicates with a base station apparatus, and receives information related to the division of uplink radio resources that can be transmitted in common between the mobile station apparatuses from the base station apparatus. Further, when receiving information indicating the position of one or more uplink radio resources common between mobile station apparatuses from the base station apparatus, the radio resources are divided based on the information on the division. It is said.

  (10) In the radio communication method of the present invention, communication is performed between a base station apparatus and a plurality of mobile station apparatuses, and one or more of the mobile station apparatuses individually allocate radio resources for uplink data transmission. A wireless communication method applied to a wireless communication system including a mobile station device that is not connected, and is common among a plurality of mobile station devices communicating with each other in the base station device Allocating one or more uplink radio resources; transmitting information indicating the radio resource allocation to the mobile station apparatus; and information indicating a position of the radio resource in the mobile station apparatus. If there is no uplink radio resource allocated to each mobile station apparatus and there is data to be transmitted, the allocation is performed according to the downlink radio channel condition. Selecting a radio resource from the hit was radio resources, it is characterized by comprising at least a step of transmitting data using the selected radio resource.

  (11) According to the radio communication method of the present invention, communication is performed between a base station apparatus and a plurality of mobile station apparatuses, and one or more of the mobile station apparatuses allocate radio resources for uplink data transmission. A radio communication method applied to a radio communication system including a mobile station apparatus that is not connected, and information on division of uplink radio resources that can be transmitted in common between the mobile station apparatuses in the base station apparatus And a step of allocating one or more uplink radio resources common to the mobile station devices, and transmitting information indicating the position of the radio resources to the mobile station devices. In the mobile station apparatus, when the information on the division is received and the information indicating the position of the radio resource is received, the radio resource is determined based on the information on the division. It is characterized in that it comprises at least the step of dividing.

  (12) The integrated circuit of the present invention communicates between a base station apparatus and a plurality of mobile station apparatuses, and one or more of the mobile station apparatuses are individually assigned radio resources for uplink data transmission. An integrated circuit applied to a radio communication system including a mobile station device that is not connected, and is common among the mobile station devices to a plurality of mobile station devices that communicate with each other in the base station device, and It is characterized by having means for allocating one or more uplink radio resources corresponding to a link radio propagation path state, and means for transmitting information indicating the radio resource allocation to the mobile station apparatus.

  (13) The integrated circuit of the present invention communicates between a base station apparatus and a plurality of mobile station apparatuses, and one or more of the mobile station apparatuses are individually assigned radio resources for uplink data transmission. An integrated circuit applied to a radio communication system including a mobile station device that has not been allocated, wherein, in the mobile station device, one or more uplink radio resource allocations common between the base station device and the mobile station device If there is no uplink radio resource allocated to the mobile station device individually from the base station device and data to be transmitted from the base station device, the allocation is performed according to the downlink radio channel state. And a means for selecting a radio resource from the selected radio resources and a means for transmitting data using the selected radio resource.

  (14) Further, the integrated circuit of the present invention performs communication between a base station apparatus and a plurality of mobile station apparatuses, and at least one of the mobile station apparatuses has radio resource allocation for uplink data transmission. An integrated circuit applied to a radio communication system including a mobile station apparatus that has not been configured, wherein the base station apparatus transmits information on division of uplink radio resources that can be transmitted in common between the mobile station apparatuses. Means for notifying the station apparatus, means for allocating one or more uplink radio resources common to the mobile station apparatuses, and means for transmitting information indicating the radio resource allocation to the mobile station apparatus. It is a feature.

  (15) The integrated circuit of the present invention communicates between a base station apparatus and a plurality of mobile station apparatuses, and at least one of the mobile station apparatuses has radio resource allocation for uplink data transmission. An integrated circuit applied to a radio communication system including a mobile station apparatus that has not been received, wherein the mobile station apparatus receives information related to the division of uplink radio resources that can be transmitted in common between the mobile station apparatuses Means for receiving information indicating the radio resource allocation, and means for dividing the allocated radio resource based on the information on the division.

  According to the present invention, efficient collision type data transmission can be performed.

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 of this invention. It is a figure which shows the structure of the base station apparatus which concerns on embodiment of this invention. It is a flowchart which shows the operation example of the base station apparatus which concerns on embodiment of this invention. It is a flowchart which shows the operation example of the mobile station apparatus which concerns on embodiment of this invention. It is a figure which shows the operation example which concerns on embodiment of this invention. It is a flowchart which shows the operation example of the base station apparatus which concerns on embodiment of this invention. It is a flowchart which shows the operation example of the mobile station apparatus which concerns on embodiment of this invention. It is a figure which shows the operation example which concerns on embodiment of this invention. It is a figure which shows the operation example which concerns on embodiment of this invention. It is a figure which shows the structure of the mobile station apparatus which concerns on embodiment of this invention. It is a figure which shows the structure of the base station apparatus which concerns on embodiment of this invention. It is a flowchart which shows the operation example of the base station apparatus which concerns on embodiment of this invention. It is a flowchart which shows the operation example of the mobile station apparatus which concerns on embodiment of this invention. It is a figure which shows the operation example which concerns on embodiment of this invention. It is a figure which shows the operation example which concerns on embodiment 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 is accessed. The configuration (frequency position and time position) of the random access channel RACH is notified from the base station apparatus 3 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 processing time (delay time) that is consumed when connection is made in EUTRA or user data is transmitted.

  In Non-Patent Document 2, in the case of an uplink radio resource request using an uplink radio resource request signal (scheduling request) or a random access channel RACH, a considerable amount of time is spent before uplink user data transmission. The base station apparatus newly allocates a collision type (contention type) resource block to the mobile station apparatus that is uplink-synchronized with the station apparatus, and notifies the allocation information to the mobile station apparatus using the downlink control channel PDCCH. A method of collision type (contention type) uplink data transmission is proposed in which a mobile station apparatus with data to be transmitted reduces the delay time spent on user data transmission by transmitting data to the allocated collision type resource block. ing.

Example 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 collision type 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. The wireless unit 101 up-converts input data to a radio frequency and transmits data from a 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 indicates mobile station apparatus identification information arranged in the downlink control channel PDCCH of each component carrier and common identification information (for example, collision type (competitive type) radio resource allocation between mobile station apparatuses) Identification information and identification information indicating the broadcast channel PBCH, etc.) to determine whether the data is destined for the own mobile station apparatus. In the case of data destined for the own mobile station apparatus, the downlink shared data processed by the reception processing unit 105 The data of 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 scheduling information for collision type (contention type) data transmission) 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 collision type 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 collision type 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 and the collision type data scheduling unit. The collision type data scheduling unit 121 needs to determine the necessity of collision type data transmission from the scheduling result of the UL scheduling unit 115, the scheduling information of the collision type data, and the measurement result of the downlink radio channel characteristics, and needs to transmit In this case, scheduling of collision type data transmission is performed. Then, the scheduling result is output to the control unit 111.

  FIG. 6 shows a configuration diagram of the base station apparatus 3 according to the embodiment of the present invention. The base station apparatus 3 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 apparatus side scheduling unit). . 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, the UL scheduling unit 217 performs scheduling of collision type (contention type) data transmission when scheduling to each mobile station apparatus is completed and radio resources allocated to the uplink shared channel PUSCH still remain. 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 collision type 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 communicates with a 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.

  A mobile station device located far from the base station device has less data capacity that can be transmitted in one resource block than a mobile station device located near the base station device due to the influence of the radio propagation path. Since the base station apparatus does not know the position of the mobile station apparatus, when allocating collision type (competitive type) radio resources, the base station apparatus must set the radio resource capacity according to the mobile station apparatus at a distant position. Usage efficiency is poor.

  The base station apparatus allocates a collision type radio resource for a mobile station apparatus located near the base station apparatus and a collision type radio resource for a mobile station apparatus located far from the base station apparatus. The mobile station apparatus is assigned both a collision type radio resource for the mobile station apparatus located near the base station apparatus and a collision type radio resource for the mobile station apparatus located far from the base station apparatus. In this case, one of the collision radio resources is selected in consideration of the position of the mobile station apparatus, and data is transmitted using the selected collision radio resource. In this way, radio resources can be used effectively. The mobile station apparatus calculates the position from the base station apparatus from the downlink radio propagation path state (downlink path loss (Pathloss)) or downlink pilot channel received power (Reference symbol received power: RSRP), Calculation is performed using GPS (Global Positioning System) or the like.

  In the present embodiment, the base station apparatus allocates collision-type radio resources to mobile station apparatuses that are close to the base station apparatus, and collision-type radio to mobile station apparatuses that are far from the base station apparatus. The resource allocation is performed, each allocation information is created, and each allocation information is transmitted to the mobile station apparatus using identification information indicating a different collision type (contention type) radio resource allocation. Each of the identification information is received, the collision type radio resource suitable for the mobile station apparatus is selected according to the downlink radio propagation path state, and the collision type data transmission is performed.

Operations of the base station device 3 and the mobile station device 1-1 will be described.
FIG. 7 and FIG. 8 are flowcharts showing an operation example of collision type data transmission between the base station apparatus 3 and the mobile station apparatus 1-1, respectively, according to the embodiment of the present invention.

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

  The base station apparatus 3 allocates the radio resource of the uplink shared channel PUSCH to each mobile station apparatus. After the allocation, the base station device 3 checks whether or not the radio resources of the allocated uplink shared channel PUSCH still remain (step S101). If radio resources of the uplink shared channel PUSCH to be allocated still remain, the base station device 3 performs collision type (contention type) radio resource allocation processing (position of radio resources, number of radio resources, MCS (Modulation and Coding). (Scheme: modulation encoding method) etc.) (step S102). When a plurality of radio resources remain, the base station device 3 assigns radio resources to mobile station devices that are close to the base station device 3 (assignment with a large data capacity) and moves far from the base station device 3. Radio resource allocation (allocation with a small data capacity) to the station apparatus is performed. When there are no remaining radio resources, the base station apparatus 3 ends the scheduling of radio resource allocation for the subframe.

Based on the result of the collision type radio resource allocation, the base station apparatus 3 determines the control data and the data capacity including the identification information indicating the collision type radio resource allocation having a large data capacity and the collision type radio resource allocation information having a large data capacity. Either of the identification information indicating the collision type radio resource allocation with small data and the control data including the collision type radio resource allocation information with small data capacity is created (step S103).
The base station apparatus 3 transmits the control data created on the downlink control channel PDCCH (step S104). And the base station apparatus 3 complete | finishes the scheduling of the radio | wireless resource allocation of the sub-frame.

  The mobile station apparatus 1-1 monitors the downlink control channel PDCCH in order to detect identification information indicating collision type (contention type) radio resource allocation. The mobile station apparatus 1-1 uses the downlink control channel PDCCH to identify identification data indicating collision-type radio resource allocation with a large data capacity and control data including collision-type radio resource allocation information with a large data capacity and a collision with a small data capacity. Identification information indicating allocation type radio resource allocation and control data including collision type radio resource allocation information having a small data capacity, or identification information indicating either type of collision type radio resource allocation is detected and allocation information is detected. Is acquired (step S201), it is confirmed whether collision type data transmission is necessary (step S202). When the mobile station apparatus 1-1 has transmission data in the transmission buffer, and there is no uplink radio resource allocation in the mobile station apparatus and collision-type data transmission is necessary, the mobile station apparatus 1-1 checks the downlink radio channel state (step S203). When the downlink radio channel state is good, the mobile station apparatus 1-1 checks whether the allocation information is information indicating collision type radio resource allocation with a large data capacity (step S204), and the allocation information is the data capacity. Is the information indicating a large collision type radio resource allocation, the collision type data is created with the data size and modulation / coding method indicated by the allocation information (step S205), and the allocated uplink shared channel PUSCH The data created at the radio resource position is transmitted (step S206). The data size and modulation / coding method may be determined in advance between the base station device 3 and the mobile station device 1-1. By doing so, the information included in the allocation information can be reduced. After transmitting the data, the mobile station apparatus 1-1 waits for a collision type data transmission response from the base station apparatus 3, and when receiving an ACK (Acknowledgement), clears the buffer of the transmitted data. When NACK (Negative Acknowledgment) is received, the transmitted data is left in the buffer (S207).

  If the downlink radio channel condition is bad, it is confirmed whether the allocation information indicates collision type radio resource allocation with a small data capacity (step S208), and the allocation information indicates the collision type radio resource allocation with a small data capacity. In the case of the indicated information, collision type data is created with the data size and modulation / coding method indicated by the allocation information (step S209), and the data created at the radio resource position of the allocated uplink shared channel PUSCH Is transmitted (step S210). After the data transmission, a response to the collision type data transmission from the base station apparatus 3 is waited. When an ACK (acknowledgment) is received, the buffer of the transmitted data is cleared. When NACK (negative response) is received, the transmitted data is left in the buffer (step S211).

  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 collision type data transmission. If the allocation information of the collision type radio resource is not suitable, the collision type data transmission is not performed.

  Note that the mobile station apparatus 1-1 may measure the radio propagation path state in advance and monitor the downlink control channel PDCCH only for one of the identification information based on the result. Further, in the above description, two example groups of collision type radio resource allocation with a large data capacity and collision type radio resource allocation with a small data capacity are shown, but there may be three or more groups. In that case, it has the same number of identification information as the number of groups.

  In addition, the state of the downlink propagation path is good means that the downlink path loss is small, the reception power of the downlink pilot channel DPiCH is large, or the reception quality of the downlink pilot channel DPiCH is good. . Also, the condition of the downlink propagation path is bad means that 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. In addition, a threshold value for determining whether the downlink channel condition is good or bad may be determined in advance between the base station device 3 and the mobile station device 1-1. You may alert | report a threshold value.

A specific example is shown in FIG.
The base station apparatus 3 allocates the radio resource of the uplink shared channel PUSCH to each mobile station apparatus. After the allocation, the base station device 3 checks whether or not the radio resources of the allocated uplink shared channel PUSCH still remain. If the radio resources of the uplink shared channel PUSCH to be allocated still remain, the base station apparatus 3 allocates collision-type radio resources with a small data capacity and allocation of collision-type radio resources with a large data capacity as shown in FIG. To do.

  Based on the result of the collision type radio resource allocation, the base station apparatus 3 identifies the identification information X indicating the collision type radio resource allocation with a small data capacity, the start position 3 of the collision type radio resource, and the number of radio resources continuous in the frequency domain. Three pieces of allocation information including modulation coding scheme A, identification information Y indicating collision type radio resource allocation with a small data capacity, start position 9 of the collision type radio resource, and three radio resources continuous in the frequency domain, Allocation information including modulation and coding scheme B is created. And the base station apparatus 3 transmits the allocation information created by downlink control channel PDCCH.

  The mobile station apparatus 1-1 monitors the downlink control channel PDCCH in order to detect identification information X and Y indicating collision type radio resource allocation. The mobile station apparatus 1-1 detects both identification information X and Y indicating collision radio resource allocation on the downlink control channel PDCCH, and acquires allocation information. The mobile station apparatus 1-1 confirms whether or not collision-type data transmission is necessary. If collision-type data transmission is necessary, the mobile station apparatus 1-1 confirms the downlink radio channel state. Here, it is assumed that the downlink radio propagation path state of the mobile station apparatus 1-1 is bad. Since the identification information X is detected and there is collision-type radio resource allocation with a small data capacity, the data size is calculated from the number of radio resources 3 of the allocation information indicated by the identification information X and the modulation and coding scheme A, Data is created based on the calculated data size and modulation / coding scheme, and data created at the radio resource position (resource block 3, resource block 4, resource block 5) of the allocated uplink shared channel PUSCH is transmitted. To do.

  After the data transmission, the mobile station apparatus 1-1 waits for a response to the collision type data transmission from the base station apparatus 3, and when receiving an ACK (Acknowledgement), clears the buffer of the transmitted data. When NACK (Negative Acknowledgment) is received, the transmitted data is left in the buffer.

  By doing in this way, the data transmission which considered the position of a base station apparatus and a mobile station apparatus is attained, and a radio | wireless resource can be used effectively. A mobile station apparatus located far from the base station apparatus can execute collision-type uplink data transmission while maintaining the data error rate at an appropriate value, and the mobile station apparatus located close to the base station apparatus While maintaining a data error rate at an appropriate value, a large amount of data can be transmitted by collision-type uplink data transmission, and high utilization efficiency of radio resources can be realized.

(Example 2)
[Description of operation]
In this embodiment, the base station apparatus performs the collision type (competitive type) radio resource allocation information for the mobile station apparatus located near the base station apparatus and the mobile station apparatus located far from the base station apparatus. One of the allocation information of all the collision type radio resources is created and the allocation information is transmitted to the mobile station apparatus using one identification information. The mobile station apparatus allocates the collision type radio resource allocation information. Is received from the allocation information and the downlink radio propagation path state measured by the mobile station apparatus, and it is determined whether or not to perform collision type data transmission, and data is transmitted using the allocated collision type radio resource. .

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

  The base station apparatus 3 allocates the radio resource of the uplink shared channel PUSCH to each mobile station apparatus. After the allocation, the base station device 3 checks whether or not the radio resources of the allocated uplink shared channel PUSCH still remain (step S301). If radio resources of the uplink shared channel PUSCH to be allocated still remain, the base station device 3 allocates collision type (contention type) radio resources (position of radio resources, number of radio resources, MCS (Modulation and Coding Scheme). : Modulation coding method) (step S302). Note that the base station device 3 is configured to allocate radio resources of mobile station devices that are close to the base station device 3 in units of subframes (assignment with a large data capacity) or mobile station devices that are far from the base station device 3. One of radio resource allocation (allocation with a small data capacity) is performed. When there are no remaining radio resources, the base station apparatus 3 ends the scheduling of radio resource allocation for the subframe.

  The base station apparatus 3 creates control data including identification information indicating the collision type radio resource allocation and the collision type radio resource allocation information from the result of the collision type radio resource allocation (step S303). The base station apparatus 3 transmits the control data created on the downlink control channel PDCCH (step S304). And the base station apparatus 3 complete | finishes the scheduling of the radio | wireless resource allocation of the sub-frame.

  The mobile station apparatus 1-1 monitors the downlink control channel PDCCH in order to detect identification information indicating collision type (contention type) radio resource allocation. When the mobile station apparatus 1-1 detects the identification information indicating the collision radio resource allocation on the downlink control channel PDCCH and acquires the allocation information (step S401), the mobile station apparatus 1-1 stores the allocation information in the transmission buffer. It is confirmed whether there is transmission data, there is no uplink radio resource allocation for each mobile station apparatus, and collision type data transmission is necessary (step S402). The mobile station apparatus 1-1 confirms whether or not collision-type data transmission is necessary. If collision-type data transmission is necessary, the mobile station apparatus 1-1 confirms the downlink radio propagation path state (step S403). When the downlink radio channel condition is good, the mobile station apparatus 1-1 determines whether the information indicates collision radio resource allocation with a large data capacity from the modulation and coding scheme of the allocation information (step S404). If the allocation information is information indicating collision-type radio resource allocation with a large data capacity, the mobile station apparatus 1-1 creates collision-type data using the modulation / coding scheme indicated by the allocation information (step 405), the data created at the radio resource position of the allocated uplink shared channel PUSCH is transmitted (step S406). After transmitting the data, the mobile station apparatus 1-1 waits for a collision type data transmission response from the base station apparatus 3, and when receiving an ACK (Acknowledgement), clears the buffer of the transmitted data. When a NACK (Negative Acknowledgment) is received, the transmitted data is left in the buffer (S407).

  If the downlink radio channel condition is poor, the mobile station apparatus 1-1 determines whether the information indicates collision radio resource allocation with a small data capacity from the modulation and coding scheme of the allocation information (step S408). When the allocation information is information indicating collision-type radio resource allocation with a small data capacity, the mobile station apparatus 1-1 creates collision-type data using the modulation / coding scheme indicated by the allocation information (step S409), data created at the radio resource position of the allocated uplink shared channel PUSCH is transmitted (step S410). After the data transmission, a response to the collision type data transmission from the base station apparatus 3 is waited. When an ACK (acknowledgment) is received, the buffer of the transmitted data is cleared. If NACK (negative response) is received, the transmitted data is left in the buffer (step S611).

  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 collision type data transmission. If the collision type radio resource allocation information is not suitable, data transmission is not performed.

  In the above description, two group examples of collision type radio resource allocation with a large data capacity and collision type radio resource allocation with a small data capacity are shown, but there may be three or more groups.

A specific example is shown in FIG.
The base station apparatus 3 allocates the radio resource of the uplink shared channel PUSCH to each mobile station apparatus. After the allocation, the base station device 3 checks whether or not the radio resources of the allocated uplink shared channel PUSCH still remain. If the radio resources of the uplink shared channel PUSCH to be allocated still remain, the base station device 3 allocates collision type radio resources with a small data capacity as shown in FIG.

  Based on the result of the collision type radio resource allocation, the base station apparatus 3 modulates the identification information Z indicating the collision type radio resource allocation, the start position 3 of the collision type radio resource, the number of radio resources continuous in the frequency domain, and three. Allocation information including allocation information including the encoding scheme C is created. And the base station apparatus 3 transmits the allocation information created by downlink control channel PDCCH.

  The mobile station apparatus 1-1 monitors the downlink control channel PDCCH in order to detect the identification information Z indicating the collision type radio resource allocation. The mobile station apparatus 1-1 detects the identification information Z indicating the collision type radio resource allocation on the downlink control channel PDCCH, and acquires the allocation information. The mobile station apparatus 1-1 confirms whether or not collision-type data transmission is necessary. If collision-type data transmission is necessary, the mobile station apparatus 1-1 confirms the downlink radio channel state. Here, the downlink radio propagation path state is assumed to be bad. The mobile station apparatus 1-1 confirms the correspondence of the modulation and coding scheme specified from FIG. 13, and since the modulation and coding scheme C is transmission data when the radio channel condition is bad, collision type data transmission is performed. Judge that it is possible. That is, since there is collision type radio resource allocation with a small data capacity, the data size is calculated from the number of radio resources 3 in the allocation information and the modulation and coding scheme C, and the data is calculated based on the calculated data size and modulation / coding scheme. And the data created at the radio resource position (resource block 3, resource block 4, resource block 5) of the allocated uplink shared channel PUSCH is transmitted. In FIG. 13, the one with the modulation and coding scheme at the top has a higher coding rate or a larger number of modulation multi-values. That is, the coding rate decreases in the order of modulation and coding schemes A, B, C, and D. Also, the number of modulation multivalues decreases in the order of modulation and coding schemes A, B, C, and D. In addition, when the mobile station apparatus 1-1 determines whether information indicating collision radio resource allocation with a large data capacity or information indicating radio resource allocation with a small data capacity from the modulation and coding scheme of the allocation information. The threshold value may be determined in advance between the base station device 3 and the mobile station device 1-1, or the base station device 3 may report the threshold value.

  After the data transmission, the mobile station apparatus 1-1 waits for a response to the collision type data transmission from the base station apparatus 3, and when receiving an ACK (Acknowledgement), clears the buffer of the transmitted data. When NACK (Negative Acknowledgment) is received, the transmitted data is left in the buffer.

  By doing in this way, the data transmission which considered the position of a base station apparatus and a mobile station apparatus is attained, and a radio | wireless resource can be used effectively. A mobile station apparatus located far from the base station apparatus can execute collision-type uplink data transmission while maintaining the data error rate at an appropriate value, and the mobile station apparatus located close to the base station apparatus While maintaining a data error rate at an appropriate value, a large amount of data can be transmitted by collision-type uplink data transmission, and high utilization efficiency of radio resources can be realized.

(Example 3)
[Configuration explanation]
FIG. 14 is a diagram showing a configuration of a 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 123 includes a UL scheduling unit 125, a control data creation unit 127, a control data analysis unit 129, and a collision type data scheduling unit 131.

  The operations of radio section 101, transmission processing section 103, reception processing section 105, transmission data control section 107, control data extraction section 109, and control section 111 are the same as those of the mobile station apparatus shown in FIG.

  The scheduling unit 123 includes a UL scheduling unit 125, a control data creation unit 127, a control data analysis unit 129, and a collision type data scheduling unit 131. The control data creation unit 127 creates control data. Control data such as a response (ACK / NACK) of downlink data received by the control data extraction unit 109 and downlink radio channel information (CQI) is created. The control data analysis unit 129 analyzes the control data from the control data extraction unit 109 and outputs uplink data scheduling information to the UL scheduling unit 125 and the collision type data scheduling unit 131. In addition, information related to collision type data transmission notified from the base station apparatus 3 is output to the collision type data scheduling unit 131.

  The UL scheduling unit 125 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 and the collision type data scheduling unit 131. The collision type data scheduling unit 131 determines whether or not to perform collision type data transmission from the scheduling result of the UL scheduling unit 125, the scheduling information of the collision type data from the base station apparatus 3, and the measurement result of the downlink radio channel characteristics. When there is a need to transmit, scheduling of collision type data transmission is performed. Then, the scheduling result is output to the control unit 111.

  FIG. 15 shows a configuration diagram of the base station apparatus 3 according to the embodiment of the present invention. The base station 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 apparatus side scheduling unit). The scheduling unit 221 includes a DL scheduling unit 223, a UL scheduling unit 225, and a control data creation unit 227.

  The operations of the data control unit 201, transmission processing unit 203, control unit 205, reception processing unit 207, control data extraction unit 209, and radio unit 211 are the same as the operations of the base station apparatus shown in FIG.

  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 downloads downlink radio propagation path information notified from the mobile station apparatus 1-1, data information of each user notified from the upper layer, and control data created by the control data creation unit 219. Scheduling for mapping user data and control data to each channel of the link 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 performs collision-type data transmission scheduling when scheduling to each mobile station apparatus is completed and radio resources allocated to the uplink still remain, and the scheduling result is used as a 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 PDSCH based on the scheduling results from the DL scheduling unit 215 and the UL scheduling unit 217. The control data creation unit 219 creates control data such as a control message including scheduling information, an uplink data response (ACK / NACK), and information related to collision type data transmission transmitted on the broadcast channel PBCH and the downlink shared channel PDSCH. To do. Then, the control data creation unit 219 outputs the created control data to the data control unit 201.

[Description of operation]
In this embodiment, the base station apparatus performs the collision type (competitive type) radio resource allocation information for the mobile station apparatus located near the base station apparatus and the mobile station apparatus located far from the base station apparatus. The allocation information including both the allocation information of all collision type radio resources is created, and the allocation information is transmitted to the mobile station apparatus using one identification information. The mobile station apparatus allocates the collision type radio resource. Is selected, and the collision type radio resource to be used is selected from the information on the collision type radio resource division received from the base station apparatus and the downlink radio channel state measured by the mobile station apparatus. Data is transmitted using the specified radio resource.

For example, the base station apparatus transmits information on the division of collision type radio resources such as the ratio of resources, the number of resource blocks, the number of divisions, etc., to the collision type radio resources using the broadcast channel PBCH and the downlink shared channel PDSCH. Notify the device. When the base station apparatus allocates the collision type radio resource, the base station apparatus notifies the mobile station apparatus of the collision type radio resource allocation information including information on the position of the radio resource and the number of resource blocks. When the mobile station apparatus receives the collision type radio resource allocation information, the mobile station apparatus determines the content of the collision type radio resource such as the ratio of radio resources to be divided, the number of resource blocks included in the radio resource to be divided, and the number of allocated radio resources. The location and number of collision-type radio resources for mobile station devices that are close to the base station device based on the division information and allocation information, and the collision-type radio resources for mobile station devices that are far from the base station device The position and the number of are calculated. Then, the mobile station apparatus selects a collision type radio resource to be used from the measured downlink radio channel state, and transmits data using the selected radio resource.
In this way, radio resources can be used effectively and only one piece of allocation information is required, so that identification information indicating collision type radio resource allocation can be reduced.

Operations of the base station device 3 and the mobile station device 1-1 will be described.
FIG. 16 and FIG. 17 are flowcharts showing an operation example of collision type data transmission between the base station apparatus 3 and the mobile station apparatus 1-1, respectively, according to the embodiment of the present invention.

  The base station device 3 communicates with the mobile station device 1-1 using one or more component carriers. Moreover, the mobile station apparatus 1-1 is in an uplink synchronization state with the base station apparatus 3. The uplink synchronization state refers to a state in which the mobile station apparatus 1-1 sets uplink transmission timing information from the base station apparatus 3 and the transmission timing information is valid. Further, the base station apparatus 3 performs scheduling of uplink radio resources in units of subframes, and notifies scheduling information on the downlink control channel PDCCH. And the base station apparatus 3 notifies the information regarding collision type | mold radio | wireless resource division | segmentation with the broadcast channel PBCH and the downlink shared channel PDSCH to the mobile station apparatus 1-1. The information on the collision type radio resource division includes the ratio of resources to be divided, the number of resource blocks included in the divided radio resources, the number of divided radio resources, the radio resources of the mobile station device located near and the far position. For example, a modulation and coding scheme and a data size of a radio resource of a mobile station apparatus. This information may be determined in advance between the base station device 3 and the mobile station device 1-1.

  The base station apparatus 3 allocates the radio resource of the uplink shared channel PUSCH to each mobile station apparatus. After the allocation, the base station device 3 checks whether or not the radio resources of the allocated uplink shared channel PUSCH still remain (step S501). If radio resources of the uplink shared channel PUSCH to be allocated still remain, the base station device 3 allocates collision type (contention type) radio resources (position of radio resources, number of radio resources, MCS (Modulation and Coding Scheme). : Modulation coding method) (step S502). If there are a plurality of radio resources, the base station apparatus 3 will assign the radio resources of the mobile station apparatus located near the base station apparatus 3 (allocation with a large data capacity) and the mobile station apparatus located far from the base station apparatus 3. Wireless resource allocation (allocation with small data capacity) is performed. When there are no remaining radio resources, the base station apparatus 3 ends the scheduling of radio resource allocation for the subframe.

  Based on the result of the collision type radio resource allocation, the base station apparatus 3 performs control including identification information indicating the collision type radio resource allocation, collision type radio resource allocation information with a large data capacity, and small type of collision type radio resource allocation information. Data is created (step S503). The base station apparatus 3 transmits the control data created by the downlink control channel PDCCH (step S504). And the base station apparatus 3 complete | finishes the scheduling of the radio | wireless resource allocation of the sub-frame.

  The mobile station apparatus 1-1 monitors the downlink control channel PDCCH in order to detect identification information indicating collision type (contention type) radio resource allocation. When the mobile station apparatus 1-1 detects the identification information indicating the collision type radio resource allocation in the downlink control channel PDCCH and acquires the allocation information (step S601), the mobile station apparatus 1-1 checks whether collision type data transmission is necessary (step S601). Step S602). When the mobile station apparatus 1-1 has transmission data in the transmission buffer, there is no uplink radio resource allocation for each mobile station apparatus, and collision-type data transmission is required, the mobile station apparatus 1-1 checks the downlink radio propagation path state (steps). S603). When the downlink radio channel condition is good, the mobile station apparatus 1-1 calculates the position / number and the data size of the collision type radio resource having a large data capacity from the allocation information and the information about the collision type radio resource division, and the data It is confirmed whether there is a collision-type radio resource having a large capacity (step S604). When there is a collision type radio resource having a large data capacity, the mobile station apparatus 1-1 creates collision type data with the calculated data size and modulation / coding method (step S605), and the assigned uplink shared channel PUSCH. The data created at the wireless resource position is transmitted (step S606). After transmitting the data, the mobile station apparatus 1-1 waits for a collision type data transmission response from the base station apparatus 3, and when receiving an ACK (Acknowledgement), clears the buffer of the transmitted data. When a NACK (Negative Acknowledgment) is received, the transmitted data is left in the buffer (S607).

  When the downlink radio propagation path state is bad, the mobile station apparatus 1-1 calculates the position / number and data size of the collision type radio resource having a small data capacity from the allocation information and the information on the collision type radio resource division, and the data It is confirmed whether or not there is a collision type radio resource having a small capacity (step S608). When there is a collision type radio resource with a small data capacity, the mobile station apparatus 1-1 creates collision type data with the calculated data size and modulation / coding method (step S609), and the assigned uplink shared channel The data created at the radio resource position of PUSCH is transmitted (step S610). After transmitting data, the mobile station apparatus 1-1 waits for a response to the collision type data transmission from the base station apparatus 3, and when receiving ACK (acknowledgment), clears the buffer of the transmitted data. If NACK (negative response) is received, the transmitted data is left in the buffer (step S611).

  When there is no transmission data in the transmission buffer, or when there is an uplink radio resource allocation for each mobile station device and there is no need for collision-type data transmission, or when the mobile station device 1-1 does not need to transmit a downlink radio channel If the state and collision type radio resource allocation information are not suitable, data transmission is not performed.

  In the above description, two group examples of collision type radio resource allocation with a large data capacity and collision type radio resource allocation with a small data capacity are shown, but there may be three or more groups.

A specific example is shown in FIG.
Base station apparatus 3 has a ratio of resources to be divided by broadcast channel PBCH 1: 1 (that is, a ratio of radio resource 1 of a mobile station apparatus located far from radio resource 1 of a mobile station apparatus located in a close position). ), Modulation coding scheme A for radio resources of a mobile station device in a close position, modulation coding scheme B for radio resources of a mobile station device in a distant position, and the arrangement order of radio resources (small data size / large data size) Is informed.

  The base station apparatus 3 allocates the radio resource of the uplink shared channel PUSCH to each mobile station apparatus. After the allocation, the base station device 3 checks whether or not the radio resources of the allocated uplink shared channel PUSCH still remain. If radio resources of the uplink shared channel PUSCH to be allocated still remain, collision type radio resources are allocated as shown in FIG.

  Based on the result of the collision type radio resource allocation, the base station apparatus 3 includes the identification information Z indicating the collision type radio resource allocation, the start position 3 of the collision type radio resource, and the number of radio resources which are continuous in the frequency domain. Create assignment information. And the base station apparatus 3 transmits the allocation information created by downlink control channel PDCCH.

  The mobile station apparatus 1-1 monitors the downlink control channel PDCCH in order to detect the identification information Z indicating the collision type radio resource allocation. The mobile station apparatus 1-1 detects the identification information Z indicating the collision type radio resource allocation on the downlink control channel PDCCH, acquires the allocation information, and confirms whether collision type data transmission is necessary. When there is transmission data in the transmission buffer, there is no uplink radio resource allocation for each mobile station device, and collision type data transmission is required, the mobile station device 1-1 checks the downlink radio propagation path state. Here, the radio propagation path state is assumed to be good. The mobile station apparatus 1-1 calculates the position / number and the data size of the collision type radio resource having a large data capacity from the allocation information and the information on the collision type radio resource division. The number of radio resources that are continuous in the frequency domain is 6 because the ratio of resources divided by 6 is 1: 1, so the number of collision-type radio resources with a small data capacity and the number of collision-type radio resources with a large data capacity are each three. The start position of the collision type radio resource having a large data capacity is from the resource block 6. Then, the mobile station apparatus 1-1 calculates the data size from the number of radio resources and the modulation and coding scheme, creates data based on the calculated data size and the modulation and coding scheme, and the assigned uplink Data created at the radio resource position (resource block 6, resource block 7, resource block 8) of the shared channel PUSCH is transmitted. After the data transmission, the mobile station apparatus 1-1 waits for a response to the collision type data transmission from the base station apparatus 3, and when receiving an ACK (Acknowledgement), clears the buffer of the transmitted data. When NACK (Negative Acknowledgment) is received, the transmitted data is left in the buffer.

  By doing in this way, the data transmission which considered the position of a base station apparatus and a mobile station apparatus is attained, and a radio | wireless resource can be used effectively.

Another example is shown in FIG.
Base station apparatus 3 has a ratio of resources to be divided by broadcast channel PBCH 1: 1 (that is, a ratio of radio resource 1 of a mobile station apparatus located far from radio resource 1 of a mobile station apparatus located in a close position). ), The number of divisions of each collision-type radio resource, 2, the modulation and coding scheme A of the radio resource of the mobile station device in the near position, the modulation and coding scheme B of the radio resource of the mobile station device in the far position, and the arrangement of the radio resources The order (small data size / large data size) is reported.

  The base station apparatus 3 allocates the radio resource of the uplink shared channel PUSCH to each mobile station apparatus. After the allocation, the base station device 3 checks whether or not the radio resources of the allocated uplink shared channel PUSCH still remain. If radio resources of the uplink shared channel PUSCH to be allocated still remain, the base station device 3 performs collision type radio resource allocation as shown in FIG.

  Based on the result of the collision type radio resource allocation, the base station apparatus 3 obtains the identification information Z indicating the collision type radio resource allocation, the start position 3 of the collision type radio resource, and the number of radio resources that are four consecutive in the frequency domain. Create assignment information that includes it. And the base station apparatus 3 transmits the allocation information created by downlink control channel PDCCH.

  The mobile station apparatus 1-1 monitors the downlink control channel PDCCH in order to detect the identification information Z indicating the collision type radio resource allocation. The mobile station apparatus 1-1 detects the identification information Z indicating the collision type radio resource allocation on the downlink control channel PDCCH, and acquires the allocation information. The mobile station apparatus 1-1 confirms whether or not collision-type data transmission is necessary. If collision-type data transmission is necessary, the mobile station apparatus 1-1 confirms the downlink radio channel state. Here, it is assumed that the downlink radio propagation path state is good. The mobile station apparatus 1-1 calculates the position / number and the data size of the collision type radio resource having a large data capacity from the allocation information and the information on the collision type radio resource division. Since the number of radio resources that are continuous in the frequency domain is 4 and the ratio of resources to be divided is 1: 1, the collision type radio resource position with a large data capacity is the resource block No. 5 and the resource block No. 6. In addition, since the number of divisions of each collision radio resource is 2, the number of resources that can be used by one mobile station apparatus is 1. Then, the mobile station apparatus 1-1 calculates the data size from the number of radio resources and the modulation and coding scheme, creates data based on the calculated data size and modulation / coding scheme, and is assigned to the uplink shared Data created using the radio resource of either the resource block 5 or the resource block 6 at the radio resource position of the channel PUSCH is transmitted. After the data transmission, the mobile station apparatus 1-1 waits for a response to the collision type data transmission from the base station apparatus 3, and when receiving an ACK (Acknowledgement), clears the buffer of the transmitted data. When NACK (Negative Acknowledgment) is received, the transmitted data is left in the buffer.

  By doing in this way, the data transmission which considered the position of a base station apparatus and a mobile station apparatus is attained, and a radio | wireless resource can be used effectively.

  In the embodiment of the present invention, the case where the mobile station apparatus selects a radio resource for collision-type uplink data transmission based on the radio propagation path state (path loss) has been described. However, the mobile station apparatus is based on GPS (Global Positioning System). The distance from the base station apparatus is estimated, and it is determined whether the position is near or far from the base station apparatus from the estimated result, and the radio resource for collision type uplink data transmission is selected based on the determined result. You may make it do.

  In the embodiment of the present invention, an example of an allocation process in which the transmission capacities of collision-type data have different data capacities is shown, but an allocation process in which the transmission capacities are the same may be performed. For example, the base station device allocates two resource blocks to a mobile station device that is located far from the base station device for collision-type radio resources, and performs a base operation on a mobile station device that is located close to the base station device. The station apparatus allocates one resource block and performs an allocation process so as to have the same data capacity.

  In the embodiment of the present invention, the mobile station apparatus monitors the identification information indicating the collision type radio resource allocation. However, the mobile station that has been notified of the periodic radio resource allocation from the base station apparatus. The mobile station device that notifies the base station device of the transmission buffer status of the device or mobile station device and is individually assigned a radio resource from the base station device does not monitor the identification information indicating the collision type radio resource assignment. May be.

  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 of the embodiment have been described using functional block diagrams, but the functions of the respective units of the mobile station device 1-1 and the base station device 3 or these functions A program for realizing a part of the above functions is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed, whereby the mobile station apparatus and the base station apparatus Control may be performed. Here, the “computer system” 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 Base station apparatuses 101 and 213 Radio sections 103 and 203 Transmission processing sections 105 and 207 Reception processing sections 107 and 201 Data control sections 109 and 209 Control data extraction section
111, 205 control unit 113, 123, 213, 221 scheduling unit

Claims (15)

A mobile station apparatus that performs communication between a base station apparatus and a plurality of mobile station apparatuses, and one or more of the mobile station apparatuses are not individually assigned radio resources for uplink data transmission from the base station apparatus A wireless communication system comprising:
The base station device is common to the mobile station devices among the mobile station devices, allocates one or more uplink radio resources, and transmits information indicating the radio resource allocation to the mobile station device,
The mobile station apparatus receives the information indicating the radio resource allocation, and when there is no uplink radio resource allocated to each mobile station apparatus and there is data to transmit, the mobile station apparatus depends on the downlink radio channel condition. A radio communication system, wherein a radio resource is selected from the allocated radio resources, and data is transmitted using the selected radio resource. The base station apparatus creates a plurality of pieces of information indicating the radio resource allocation, adds identification information corresponding to a downlink radio channel state to the information indicating the radio resource allocation, and transmits the information to the mobile station apparatus. ,
When the mobile station apparatus monitors the identification information, detects the identification information, and receives the information indicating the radio resource allocation, the mobile station apparatus is indicated by the identification information according to a downlink radio channel state. 2. The radio communication system according to claim 1, wherein a selected radio resource is selected and data is transmitted to the selected radio resource. Radio communication in which communication is performed between a base station apparatus and a plurality of mobile station apparatuses, and at least one of the mobile station apparatuses includes a mobile station apparatus to which radio resources are not allocated for uplink data transmission A system,
The base station apparatus notifies the mobile station apparatus of information related to the division of uplink radio resources that can be transmitted in common between the mobile station apparatuses, and further adds one or more uplink radio resources common to the mobile station apparatuses. Assigning and transmitting information indicating the radio resource assignment to the mobile station device,
The mobile station apparatus receives the information related to the division, and, when receiving the information indicating the radio resource allocation, divides the radio resource based on the information related to the division.   The radio communication system according to claim 3, wherein when there is data to be transmitted, the mobile station apparatus selects a radio resource from the divided radio resources and transmits the data to the selected radio resource. .   The radio communication system according to claim 3, wherein the information related to the division of uplink radio resources that can be transmitted in common between the mobile station apparatuses indicates the number of radio resources indicated by the radio resource allocation information. A base station apparatus that communicates with a plurality of mobile station apparatuses including a mobile station apparatus that is not assigned radio resources for one or more uplink data transmissions,
A plurality of mobile station apparatuses that are in communication are common among the mobile station apparatuses, and one or more uplink radio resources corresponding to a downlink radio propagation path state are allocated, and information indicating the radio resource allocation is A base station apparatus that transmits to a mobile station apparatus. A base station apparatus that communicates with a plurality of mobile station apparatuses including a mobile station apparatus that is not assigned radio resources for one or more uplink data transmissions,
Information about division of uplink radio resources that can be transmitted in common between mobile station apparatuses is notified to the mobile station apparatus, and further, one or more uplink radio resources common to the mobile station apparatuses are allocated, and the radio resources are allocated. A base station apparatus that transmits information indicating a position of the mobile station apparatus to the mobile station apparatus. A mobile station device that communicates with a base station device,
When receiving information indicating the position of one or more uplink radio resources common between mobile station apparatuses from the base station apparatus, uplink radio resources allocated to the individual mobile station apparatuses from the base station apparatus are If there is data to be transmitted, a radio resource is selected from the allocated radio resources according to a downlink radio channel condition, and data is transmitted using the selected radio resource. A mobile station apparatus. A mobile station device that communicates with a base station device,
Receiving information on the division of uplink radio resources that can be transmitted in common between the mobile station devices from the base station device,
Further, when the information indicating the position of one or more uplink radio resources common between mobile station apparatuses is received from the base station apparatus, the radio resources are divided based on the information related to the division. Mobile station device. Radio communication including communication between a base station apparatus and a plurality of mobile station apparatuses, wherein one or more of the mobile station apparatuses are not individually assigned radio resources for uplink data transmission A wireless communication method applied to a system,
In the base station apparatus, a step of allocating one or more uplink radio resources that are common among the mobile station apparatuses to a plurality of communicating mobile station apparatuses, and information indicating the radio resource allocation is transferred to the base station apparatus. Transmitting to the station device;
In the mobile station apparatus, when there is a step of receiving information indicating the position of the radio resource and there is no uplink radio resource allocated to each mobile station apparatus and there is data to be transmitted, downlink radio propagation A radio communication method comprising at least a step of selecting a radio resource from the allocated radio resources according to a road condition, and a step of transmitting data using the selected radio resource. Radio communication in which communication is performed between a base station apparatus and a plurality of mobile station apparatuses, and at least one of the mobile station apparatuses includes a mobile station apparatus to which radio resources are not allocated for uplink data transmission A wireless communication method applied to a system,
In the base station apparatus, a step of notifying the mobile station apparatus of information related to the division of uplink radio resources that can be transmitted in common between the mobile station apparatuses, and at least one uplink common to the mobile station apparatuses Allocating radio resources and transmitting information indicating the location of the radio resources to the mobile station device;
The mobile station apparatus includes at least a step of dividing the radio resource based on the information on the division when the information on the division is received and the information indicating the position of the radio resource is received. A wireless communication method. Radio communication including communication between a base station apparatus and a plurality of mobile station apparatuses, wherein one or more of the mobile station apparatuses are not individually assigned radio resources for uplink data transmission An integrated circuit applied to a system,
Means for allocating one or more uplink radio resources corresponding to a downlink radio propagation path state, common to a plurality of mobile station apparatuses communicating with each other, in the base station apparatus; An integrated circuit comprising means for transmitting information indicating resource allocation to the mobile station apparatus. Radio communication including communication between a base station apparatus and a plurality of mobile station apparatuses, wherein one or more of the mobile station apparatuses are not individually assigned radio resources for uplink data transmission An integrated circuit applied to a system,
In the mobile station apparatus, means for receiving information indicating one or more uplink radio resource assignments common to the mobile station apparatuses from the base station apparatus, and an uplink allocated individually to the mobile station apparatus from the base station apparatus When there is no link radio resource and there is data to be transmitted, using the means for selecting a radio resource from the allocated radio resources according to the downlink radio channel state, and using the selected radio resource An integrated circuit comprising means for transmitting data. Radio communication in which communication is performed between a base station apparatus and a plurality of mobile station apparatuses, and at least one of the mobile station apparatuses includes a mobile station apparatus to which radio resources are not allocated for uplink data transmission An integrated circuit applied to a system,
In the base station apparatus, means for notifying the mobile station apparatus of information related to the division of uplink radio resources that can be transmitted in common between the mobile station apparatuses;
An integrated circuit further comprising: means for allocating one or more uplink radio resources common among mobile station apparatuses; and means for transmitting information indicating the radio resource allocation to the mobile station apparatus. Radio communication in which communication is performed between a base station apparatus and a plurality of mobile station apparatuses, and at least one of the mobile station apparatuses includes a mobile station apparatus to which radio resources are not allocated for uplink data transmission An integrated circuit applied to a system,
The mobile station apparatus includes means for receiving information related to the division of uplink radio resources that can be transmitted in common between the mobile station apparatuses, means for receiving information indicating the radio resource allocation, and information relating to the division. And an integrated circuit having a means for dividing the allocated radio resource.