WO2012017841A1 - 基地局装置、移動局装置、移動通信システム、通信方法、制御プログラムおよび集積回路 - Google Patents

基地局装置、移動局装置、移動通信システム、通信方法、制御プログラムおよび集積回路 Download PDF

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Publication number
WO2012017841A1
WO2012017841A1 PCT/JP2011/066740 JP2011066740W WO2012017841A1 WO 2012017841 A1 WO2012017841 A1 WO 2012017841A1 JP 2011066740 W JP2011066740 W JP 2011066740W WO 2012017841 A1 WO2012017841 A1 WO 2012017841A1
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WIPO (PCT)
Prior art keywords
cell
random access
station apparatus
mobile station
base station
Prior art date
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Ceased
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PCT/JP2011/066740
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English (en)
French (fr)
Japanese (ja)
Inventor
恭之 加藤
克成 上村
翔一 鈴木
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Sharp Corp
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Sharp Corp
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Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to CN201180038273.XA priority Critical patent/CN103053208B/zh
Priority to EP11814471.6A priority patent/EP2603048B1/en
Priority to US13/814,424 priority patent/US9094989B2/en
Publication of WO2012017841A1 publication Critical patent/WO2012017841A1/ja
Anticipated expiration legal-status Critical
Priority to US14/754,004 priority patent/US9538556B2/en
Priority to US15/341,734 priority patent/US10433340B2/en
Priority to US16/532,129 priority patent/US10887925B2/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0838—Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]

Definitions

  • the present invention relates to a base station device, a mobile station device, a mobile communication system, a communication method, a control program, and an integrated circuit that efficiently perform random access.
  • the W-CDMA system has been standardized as a third generation cellular mobile communication system, and services have been started sequentially.
  • HSDPA with higher communication speed has also been standardized and the service has started.
  • EUTRA Evolved Universal Terrestrial Radio Access
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Peak-to-Average Power Ratio
  • PAPR Peak-to-average Power to Ratio
  • DFT Discrete Fourier Transform
  • Advanced-EUTRA a further evolution of EUTRA.
  • communication at a maximum transmission rate of 1 Gbps or higher and 500 Mbps or higher of the uplink is performed using a band up to a maximum of 100 MHz bandwidth in the uplink and the downlink, respectively.
  • Advanced-EUTRA is considering to realize a maximum of 100 MHz band by bundling a plurality of bands below 20 MHz of EUTRA so that EUTRA mobile station devices can be accommodated.
  • one band of 20 MHz or less of EUTRA is called a component carrier (Component Carrier: CC) (Non-patent Document 3).
  • CC Component Carrier
  • one cell is configured by combining one downlink component carrier and one uplink component carrier. A single cell can be configured with only one downlink component carrier.
  • 3GPP TS (Technical Specification) 36.300, V9.30 (2010-03), Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN), Overall description Stage2 3GPP TS (Technical Specification) 36.321, V9.20 (2010-03), Evolved Universal Terrestrial Radio Access (E-UTRA) Medium Access Control (MAC) protocol specification 3GPP TR (Technical Specification) 36.814, V9.00 (2010-03), Evolved Universal Terrestrial Radio Access (E-UTRA) Further advancements Efor U-physical layer Aspects
  • the mobile station apparatus When the mobile station apparatus communicates with the base station apparatus using a plurality of cells, the mobile station apparatus may connect to the base station apparatus via a repeater (Repeater) or the like.
  • the reception timing of the downlink component carrier in the mobile station apparatus may be different for each cell, and further, the transmission timing to the base station apparatus is different for each uplink component carrier of each cell.
  • the transmission timing needs to be adjusted for each uplink component carrier of the cell.
  • the present invention has been made in view of such circumstances, and a base station device, a mobile station device, and a mobile device that enable efficient random access when the transmission timing from the mobile station device is different for each cell.
  • An object is to provide a communication system, a communication method, a control program, and an integrated circuit.
  • the base station apparatus of the present invention is a base station apparatus applied to a mobile communication system that performs random access from a mobile station apparatus to the base station apparatus, and a plurality of cells are allocated to the mobile station apparatus, and the mobile station apparatus The cells having the same transmission timing in the station apparatus are grouped, the transmission timing determined for each group is notified to the mobile station apparatus, and the mobile station apparatus is associated with any one cell included in the group. Random access is permitted, and information for executing random access is notified to the mobile station apparatus for the cell to which the random access is permitted.
  • the base station apparatus of the present invention permits both contention-based random access and non-contention-based random access, or only non-contention-based random access, to the cell that permits random access. It is said.
  • the base station apparatus of the present invention permits both contention-based random access and non-contention-based random access to any one cell that permits the random access, while allowing the random access. Non-contention based random access is permitted to any other cell.
  • the base station apparatus of the present invention when changing the cell permitting random access, notifies the mobile station apparatus of information for performing random access for a cell newly permitting random access. It is characterized by that.
  • the base station apparatus of the present invention is a base station apparatus applied to a mobile communication system that performs random access from a mobile station apparatus to a base station apparatus, and a plurality of cells are allocated to the mobile station apparatus.
  • Cells having the same transmission timing in the mobile station apparatus are grouped, the transmission timing determined for each group is notified to the mobile station apparatus, and included in any one group for the mobile station apparatus Any one cell is set as the first cell, any one cell included in any other group is set as the second cell, and the cells other than the first cell and the second cell are set. Is set as a third cell, and system information and setting information of the cell are notified to the mobile station apparatus.
  • the base station apparatus of the present invention includes information for executing random access in the system information of the first cell and the second cell, and the system information of the third cell includes: It is characterized by not including information for executing random access.
  • the base station apparatus of the present invention permits contention-based random access and non-contention-based random access to the first cell, and performs non-contention-based random access to the second cell. It is characterized by permitting.
  • the mobile station apparatus of the present invention is a mobile station apparatus applied to a mobile communication system that performs random access from the mobile station apparatus to the base station apparatus, and includes allocation information of a plurality of cells from the base station apparatus. And information for performing random access to one cell for each group and receiving the information for grouping cells having the same transmission timing in the cell and executing the random access A random access preamble is transmitted only to a cell in which information is set.
  • the mobile station apparatus of this invention receives the information for performing new random access from the said base station apparatus as a result of changing the cell which permits random access in the said base station apparatus The information for executing the random access that has already been acquired is discarded.
  • the number of transmissions of the random access preamble for a cell to which both contention-based random access and non-contention-based random access are permitted from the base station apparatus exceeds the maximum number of retransmissions. If the random access preamble transmission count exceeds the maximum number of retransmissions, it is determined that the random access failure has not occurred. It is characterized by doing.
  • the mobile station apparatus of the present invention receives random access instruction information in a cell in which only non-contention based random access is permitted from the base station apparatus, and the random access instruction information performs contention based random access. If it is shown, the received random access instruction information is discarded.
  • the mobile station apparatus of the present invention when the mobile station apparatus of the present invention receives random access instruction information in a cell other than the cell to which random access is permitted from the base station apparatus, the mobile station apparatus discards the received random access instruction information. It is characterized by that.
  • the mobile station apparatus of the present invention is a mobile station apparatus applied to a mobile communication system that performs random access from the mobile station apparatus to the base station apparatus, and the base station apparatus has the same transmission timing.
  • a certain cell is grouped, and any one cell included in any one group is set as the first cell, and any one cell included in any other group is set as the second cell.
  • a cell other than the first cell and the second cell is set as a third cell, receives system information and setting information of each cell from the base station apparatus, and receives the received cell in each cell. It is characterized by setting system information and setting information.
  • the mobile station apparatus of the present invention is characterized in that a random access preamble is transmitted only to the first cell and the second cell.
  • the mobile station apparatus of the present invention receives the change instruction information for changing the first cell or the second cell from the base station apparatus, The information for performing random access of the cell or the second cell before the change is discarded.
  • the mobile station apparatus of the present invention is characterized in that when the number of random access preamble transmissions to the second cell exceeds the maximum number of retransmissions, it is determined that the random access has not failed.
  • the mobile station apparatus of the present invention receives random access instruction information from the base station apparatus in the second cell, and the received random access instruction information indicates contention based random access. Is characterized by discarding the received random access instruction information.
  • the mobile station apparatus of the present invention receives random access instruction information from the base station apparatus to the third cell, the mobile station apparatus discards the received random access instruction information. Yes.
  • the mobile communication system of the present invention includes the base station apparatus described in (1) and the mobile station apparatus described in (8), or the base station apparatus described in (5) and the above (13). It is characterized by comprising a mobile station device.
  • a communication method of the present invention is a communication method of a base station device applied to a mobile communication system that performs random access from a mobile station device to a base station device, and a plurality of cells are connected to the mobile station device. Allocating and grouping cells having the same transmission timing in the mobile station apparatus, notifying the mobile station apparatus of the transmission timing determined for each group, and any of the cells included in the group Random access to one cell is permitted, and information for executing random access is notified to the mobile station apparatus for the cell to which the random access is permitted.
  • the communication method of the present invention is a communication method of a base station apparatus applied to a mobile communication system that performs random access from a mobile station apparatus to a base station apparatus, and a plurality of cells are connected to the mobile station apparatus. And assigns the cells having the same transmission timing in the mobile station apparatus to group, notifies the mobile station apparatus of the transmission timing determined for each group, and assigns the mobile station apparatus to any one group. Any one cell included is set as the first cell, any one cell included in any other group is set as the second cell, and other than the first cell and the second cell This cell is set as a third cell, and system information and setting information of the cell are notified to the mobile station apparatus.
  • a control program of the present invention is a control program for a base station apparatus applied to a mobile communication system that performs random access from a mobile station apparatus to a base station apparatus, and a plurality of cells are allocated to the mobile station apparatus.
  • a series of processes including: permitting random access to any one of the included cells, and notifying the mobile station device of information for executing random access for the cells allowing the random access; It is characterized by being readable and executable as a command.
  • a control program of the present invention is a control program for a base station apparatus applied to a mobile communication system that performs random access from a mobile station apparatus to a base station apparatus, and a plurality of cells are allocated to the mobile station apparatus.
  • a process for allocating, a group of cells having the same transmission timing in the mobile station apparatus, a process for notifying the mobile station apparatus of the transmission timing determined for each group, and the mobile station apparatus For the mobile station apparatus, a process for allocating, a group of cells having the same transmission timing in the mobile station apparatus, a process for notifying the mobile station apparatus of the transmission timing determined for each group, and the mobile station apparatus.
  • the series of processes including, is characterized in that it has readable and executable on command of the computer.
  • the integrated circuit of the present invention is an integrated circuit that is mounted on a base station device to cause the base station device to exhibit a plurality of functions, and has a function of assigning a plurality of cells to the mobile station device. And cells having the same transmission timing in the mobile station apparatus, a function of notifying the mobile station apparatus of the transmission timing determined for each group, and included in the group for the mobile station apparatus A function of permitting random access to any one cell, and notifying the mobile station device of information for executing random access for the cell allowing the random access, the base station It is characterized by having the device demonstrate.
  • the integrated circuit of the present invention is an integrated circuit that is mounted on a base station apparatus, thereby causing the base station apparatus to exhibit a plurality of functions, and a function of allocating a plurality of cells to the mobile station apparatus A group of cells having the same transmission timing in the mobile station apparatus, a function of notifying the mobile station apparatus of the transmission timing determined for each group, and any one group for the mobile station apparatus A function to set any one cell included in the first cell, a function to set any one cell included in any other group to the second cell, the first cell and the A series of functions including a function of setting a cell other than the second cell as a third cell and a function of notifying the mobile station apparatus of system information and setting information of the cell, the base station It is characterized in that to be exhibited to the location.
  • 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
  • a broadcast channel PBCH Physical Broadcast Channel
  • the uplink pilot channel UPiCH Uplink Pilot Channel
  • the random access channel RACH Random Access Channel
  • the uplink shared channel PUSCH Physical Uplink Shared Channel
  • the uplink control channel PUCCH Physical Uplink Control Channel
  • FIG. 5 is a diagram illustrating a channel configuration in EUTRA
  • FIG. 6 is a diagram illustrating an uplink configuration in EUTRA.
  • One block is composed of 12 subcarriers and 7 OFDM symbols. Then, one resource block is configured using two blocks.
  • RACH Random access channel
  • one random access channel is prepared in one subframe, and a large number of mobile station devices, eg, mobile station devices 1-1 to 1-3 (hereinafter referred to as mobile station devices 1-1 to 1-1). 1-3 is also referred to as the mobile station device 1).
  • the arrangement configuration (frequency position and time position) of the random access channel RACH is notified from the base station apparatus 3 to the mobile station apparatus 1 as part of the system information of the base station apparatus 3.
  • the random access channel RACH is arranged at a constant period, and the random access channel RACH, the uplink shared channel PUSCH region, and the uplink control channel PUCCH region are divided as illustrated.
  • One random access channel RACH is configured using six resource blocks.
  • the purpose of using the random access channel is to synchronize the uplink between the mobile station apparatus 1 and the base station apparatus 3 in the uplink (adjust the transmission timing from the mobile station apparatus 1 to the base station apparatus 3). )It is an object.
  • Non-contention based Random Access Non-contention based random access
  • FIG. 7 is a diagram showing the procedure of Contention based Random Access.
  • the Contention based Random Access is a random access that may collide between the mobile station devices 1, and the Contention based Random Access is at the time of initial access from a state in which it is not connected (communication) with the base station device 3 or the base station This is performed by a scheduling request or the like when uplink data transmission is generated in the mobile station device 1 while being connected to the device 3 but not in uplink synchronization.
  • FIG. 8 is a diagram showing the procedure of Non-contention based Random Access.
  • Non-contention based Random Access is a random access in which no collision occurs between the mobile station apparatuses 1, and the base station apparatus 3 and the mobile station apparatus 1 are connected, but they are quickly accessed when uplink synchronization is lost.
  • the mobile station apparatus 3 is instructed by the base station apparatus 3 to move in a special case such as a handover or when the transmission timing of the mobile station apparatus 1 is not effective.
  • the station device 1 starts random access (Non-Patent Document 1).
  • Non-contention based Random Access is indicated by RRC (Radio Resource Control: Layer 3) message and downlink control channel PDCCH control data.
  • RRC Radio Resource Control: Layer 3
  • the random access preamble is composed of a preamble part and a CP (Cyclic prefix) part.
  • the preamble portion uses a CAZAC (Constant-Amplitude-Zero-Auto-Correlation-Zone-Code) sequence which is a signal pattern representing information, and 64 types of sequences are prepared to express 6-bit information.
  • CAZAC Constant-Amplitude-Zero-Auto-Correlation-Zone-Code
  • the CAZAC sequence used for the random access preamble is roughly divided into a sequence used in the contention based random access (random sequence or random preamble) and a sequence used in the non-contention based random access. (Dedicated sequence or dedicated preamble).
  • Information regarding the generation of the random access preamble is also notified from the base station apparatus 3 to the mobile station apparatus 1 as system information.
  • information on random access of system information notified from the base station apparatus 3 includes information on the maximum number of random access preamble transmissions and information on transmission power of random access preambles.
  • the mobile station device 1 transmits a random access preamble to the base station device 3 (message 1 (1), step S1). And the base station apparatus 3 which received random access preamble transmits the response (random access response) with respect to random access preamble to the mobile station apparatus 1 (message 2 (2), step S2).
  • the mobile station apparatus 1 transmits an upper layer (Layer2 / Layer3) message based on the scheduling information included in the random access response (message 3 (3), step S3).
  • the base station apparatus 3 transmits a collision confirmation message to the mobile station apparatus 1 that has received the upper layer message of (3) (message 4 (4), step S4).
  • the Contention based Random Access is also referred to as random preamble transmission.
  • the base station apparatus 3 notifies the mobile station apparatus 1 of a preamble number (or sequence number) and a random access channel number to be used (message 0 (1 '), step S11).
  • the mobile station apparatus 1 transmits the random access preamble of the designated preamble number to the designated random access channel RACH (message 1 (2 '), step S12).
  • the base station device 3 that has received the random access preamble transmits a response to the random access preamble (random access response) to the mobile station device 1 (message 2 (3 '), step S13).
  • Contention based Random Access is performed.
  • Non-contention based Random Access is also referred to as dedicated preamble transmission.
  • the mobile station apparatus 1 selects one random sequence from a random sequence group based on the downlink radio channel state (path loss) and the size of the message 3, and performs random access based on the selected random sequence.
  • a preamble is generated, and the random access preamble is transmitted on the random access channel RACH (message 1 (1)).
  • the base station device 3 When the base station device 3 detects the random access preamble from the mobile station device 1, the base station device 3 calculates a transmission timing shift amount between the mobile station device 1 and the base station device 3 from the random access preamble, and sends an L2 / L3 message. Scheduling (designation of uplink radio resource position, transmission format (message size), etc.) for transmission, Temporary C-RNTI (Cell-Radio Network Temporary Identity) assigned, downlink control channel An RA-RNTI indicating a response (random access response) addressed to the mobile station apparatus 1 that has transmitted the random access preamble of the random access channel RACH is arranged on the PDCCH, and transmission timing information and scheduling are assigned to the downlink shared channel PDSCH. A random access response message including information, Temporary C-RNTI, and preamble number (sequence number) of the received preamble is transmitted (message 2 (2)).
  • Scheduling designation of uplink radio resource position, transmission format (message size), etc
  • the mobile station apparatus 1 When the mobile station apparatus 1 detects the presence of RA-RNTI in the downlink control channel PDCCH, the mobile station apparatus 1 confirms the content of the random access response message arranged in the downlink shared channel PDSCH, and the preamble corresponding to the transmitted random access preamble If the number is included, the transmission timing is adjusted from the transmission timing information, and a mobile station such as C-RNTI (or Temporary C-RNTI) or IMSI (International Mobile Subscriber Identity) is used in the scheduled radio resource and transmission format. An L2 / L3 message including information for identifying the device 1 is transmitted (message 3 (3)). When adjusting the transmission timing, the mobile station apparatus 1 starts a transmission timing timer in which the adjusted transmission timing is valid. When this timer expires, the transmission timing becomes invalid. While the transmission timing is valid, the mobile station apparatus 1 can transmit data to the base station apparatus 3, and when the transmission timing is invalid, it can only transmit the random access preamble.
  • C-RNTI or Temporary C-RNTI
  • the mobile station apparatus 1 waits for a certain period of time for the random access response message from the base station apparatus 3, and if it does not receive the random access response message including the preamble number of the transmitted random access preamble, it again repeats the random access preamble. Send.
  • the base station apparatus 3 When the base station apparatus 3 receives the L2 / L3 message from the mobile station apparatus 1, the base station apparatus 3 uses the C-RNTI (or Temporary C-RNTI) or the IMSI included in the received L2 / L3 message.
  • a collision confirmation (contention resolution) message for determining whether or not a collision occurs between 1 and 1-3 is transmitted to the mobile station apparatus 1 (message 4 (4)).
  • the mobile station device 1 does not detect a random access response message including a preamble number corresponding to the random access preamble transmitted within a certain period, fails to transmit the message 3, or within a certain period. If the identification information of the mobile station apparatus 1 is not detected in the collision confirmation message, the process starts again from the transmission of the random access preamble (message 1 (1)) (Non-patent Document 2). When the number of random access preamble transmissions exceeds the maximum number of random access preamble transmissions indicated in the system information, the mobile station apparatus 1 determines that the random access has failed and disconnects communication with the base station apparatus 3. . In addition, after the random access procedure is successful, control data for connection is further exchanged between the base station apparatus 3 and the mobile station apparatus 1.
  • the base station apparatus 3 measures the uplink pilot channel UPiCH transmitted from the mobile station apparatus 1, calculates timing information, and sends the calculated transmission timing to the mobile station apparatus 1. This is done by notification.
  • Advanced-EUTRA a further evolution of EUTRA.
  • communication at a maximum transmission rate of 1 Gbps or higher and 500 Mbps or higher of the uplink is performed using a band up to a maximum of 100 MHz bandwidth in the uplink and the downlink, respectively.
  • FIG. 10 is an explanatory diagram of downlink component carriers in Advanced-EUTRA.
  • FIG. 11 is an explanatory diagram of an uplink component carrier in Advanced-EUTRA.
  • Advanced-EUTRA is considering to realize a maximum of 100 MHz band by bundling a plurality of bands below 20 MHz of EUTRA so that the mobile station apparatus 1 of EUTRA can be accommodated.
  • one band of 20 MHz or less of EUTRA is called a component carrier (Component Carrier: CC) (Non-patent Document 3).
  • CC component Carrier
  • one cell is configured by combining one downlink component carrier and one uplink component carrier.
  • a single cell can be configured with only one downlink component carrier.
  • the base station apparatus 3 allocates one or more cells that match the communication capability and communication conditions of the mobile station apparatus 1 from among a plurality of cells.
  • the mobile station apparatus 1 transmits / receives data in the allocated cell.
  • the mobile station apparatus 1 may be connected to the base station apparatus 3 via a repeater as shown in FIG. In such a case, both or one of the reception timing of the downlink component carrier in the mobile station apparatus 1 and the transmission timing to the base station apparatus 3 for each uplink component carrier are different for each cell.
  • the mobile station apparatus 1 is required to adjust the transmission timing for each uplink component carrier of each cell.
  • FIG. 1 is a diagram showing a configuration of a mobile station apparatus 1 according to the embodiment of the present invention.
  • the mobile station apparatus 1 includes a radio unit 101, transmission processing units 103-1 to 103-5 (hereinafter, the transmission processing units 103-1 to 103-5 are collectively referred to as a transmission processing unit 103), a reception processing unit 105- 1 to 105-5 (hereinafter, the reception processing units 105-1 to 105-5 are also collectively referred to as a reception processing unit 105), a transmission data control unit 107, a control data extraction unit 109, a random access preamble generation unit 111, a transmission Timing adjustment units 113-1 to 113-5 (hereinafter, the transmission timing adjustment units 113-1 to 113-5 are also collectively referred to as a transmission timing adjustment unit 113), a control unit 115, and a scheduling unit 117.
  • transmission processing units 103-1 to 103-5 are collectively referred to as a transmission processing unit 103
  • the scheduling unit 117 includes a control data analysis unit 119, a UL scheduling unit 121, a control data creation unit 123, and a cell management unit 125.
  • a configuration having five each of the transmission processing unit 103, the reception processing unit 105, and the transmission timing adjustment unit 113 is provided. I have to.
  • User data and control data are input to the transmission data control unit 107.
  • the transmission data control unit 107 assigns each data to each channel of the uplink component carrier of each cell in accordance with an instruction from the control unit 115, and sends the data to the transmission processing units 103-1 to 103-5.
  • the transmission processing units 103-1 to 103-5 modulate and encode the data input from the transmission data control unit 107, convert the input signal from serial to parallel, and perform DFT-IFFT (Inverse Fast Fourier Transform (inverse high speed). Fourier transform))) is performed, and OFDM signal processing such as CP insertion is performed to generate an OFDM signal.
  • DFT-IFFT Inverse Fast Fourier Transform (inverse high speed). Fourier transform)
  • Transmission timing adjustment sections 113-1 to 113-5 adjust the transmission timing of the signal output for each uplink component carrier of each cell from the transmission timing information passed from control section 115, and after adjusting the transmission timing, Is up-converted to a radio frequency by the radio unit 101 and transmitted from the transmission antenna.
  • the random access preamble is transmitted without adjusting the transmission timing even when the transmission timing is set.
  • the radio unit 101 down-converts the radio signal received from the antenna and passes it to the reception processing unit 105.
  • Reception processing sections 105-1 to 105-5 perform FFT (Fast Fourier Transform) processing, decoding, demodulation processing, etc. on the signal passed from radio section 101, and extract control data from the demodulated data Passed to part 109. Further, the radio propagation path characteristics of the downlink component carrier of each cell are measured, and the measurement result is passed to the scheduling unit 117.
  • FFT Fast Fourier Transform
  • the control data extraction unit 109 looks at the C-RNTI (mobile station apparatus identification information) arranged in the downlink control channel PDCCH of each cell and the downlink scheduling information from the input data, and sends it to the own mobile station apparatus.
  • the downlink shared channel PDSCH data demodulated by the reception processing units 105-1 to 105-5 is divided into control data and user data.
  • the control data is passed to the scheduling unit 117, and the user data is passed to the upper layer.
  • uplink scheduling information included in the downlink control channel PDCCH is passed to the scheduling section 117.
  • the random access response message is passed to the scheduling unit 117.
  • the scheduling unit 117 is instructed to return a response to the received data.
  • the control unit 115 Based on an instruction from the scheduling unit 113, the control unit 115 performs radio unit 101, transmission processing units 103-1 to 103-5, reception processing units 105-1 to 105-5, transmission data control unit 107, and control data extraction.
  • the unit 109 is controlled.
  • the scheduling unit 117 includes a control data analysis unit 119, a UL scheduling unit 121, a control data creation unit 123, and a cell management unit 125.
  • the control data creation unit 123 creates control data and creates a response of the downlink data received by the control data extraction unit 109.
  • the control data analysis unit 119 analyzes the control data from the control data extraction unit 109.
  • the control data analysis unit 119 passes the cell system information, cell allocation information, random access response message, and random access instruction information received from the base station apparatus 3 to the cell management unit 125, and information on random access included in the system information. To the random access preamble generation unit 111.
  • the UL scheduling unit 121 controls the transmission data control unit 107 based on the scheduling information of the uplink data. Further, the cell management unit 125 is instructed to perform random access based on control information from an upper layer.
  • the cell management unit 125 manages cells set from the base station apparatus 3 and manages system information such as the physical channel configuration, transmission power information, and information related to random access for each cell notified from the base station apparatus 3. .
  • the cell management unit 125 determines a cell to which a random access preamble is transmitted, and uses the information regarding the random access of the cell used for random access to receive processing unit 105- Cell information and sequence selected by the random access preamble generation unit 111 by randomly selecting a sequence to be used based on the downlink radio propagation path characteristic information passed from 1 to 105-5 and the transmission data size of the message 3 The number (preamble number) is notified. Details of random access will be described later.
  • the cell management unit 125 When the cell management unit 125 confirms the content of the random access response passed from the control data analysis unit 119 and detects the preamble number of the transmitted random access preamble, the cell management unit 125 associates the transmission timing information with the randomly accessed cell. The data is transferred to any of the transmission timing adjustment units 113-1 to 113-5, and the assigned radio resource information is transferred to the UL scheduling unit 121. When the contention resolution message is confirmed, the random access procedure is terminated. Further, the sequence number (preamble number) and the random access channel number are extracted from the random access instruction information passed from the control data analysis unit 119, and the cell information, the sequence number (preamble number) and the random access are extracted to the random access preamble generation unit 111. Pass the channel number.
  • the sequence selected by the mobile station apparatus 1 is indicated as a random sequence (random preamble), and the sequence designated by the base station apparatus 3 is indicated as a dedicated sequence (dedicated preamble).
  • the mobile station apparatus 1 performs random access using the uplink component carrier of the cell that has received the random access instruction information.
  • the mobile station device 1 selects a sequence from a random sequence.
  • the random access preamble generation unit 111 creates a preamble part and a CP part from the information on the random access of the designated cell and the sequence number, and generates a random access preamble.
  • the random access channel position to be used is selected from the information related to the random access of the specified cell, and the generated random access preamble is assigned to the selected random access channel position.
  • the preamble part and the CP part are created from the information on the random access of the designated component carrier and the sequence number, and the random access preamble is generated.
  • the random access channel position to be used is selected from the information regarding the random access of the designated cell and the random access number. Then, the generated random access preamble is assigned to the selected random access channel position in the designated component carrier.
  • FIG. 2 shows a configuration diagram of the base station apparatus 3 according to the embodiment of the present invention.
  • Base station apparatus 3 includes radio section 201, transmission processing sections 203-1 to 203-5 (hereinafter, transmission processing sections 203-1 to 203-5 are also collectively referred to as transmission processing section 203), reception processing section 205- 1 to 205-5 (hereinafter, the reception processing units 205-1 to 205-5 are also collectively referred to as the reception processing unit 205), the transmission data control unit 207, the control data extraction unit 209, and the preamble detection units 211-1 to 211.
  • the preamble detection units 211-1 to 211-5 are also collectively referred to as a preamble detection unit 211), a control unit 213, and a scheduling unit 215 (base station side scheduling unit).
  • the scheduling unit 215 includes a DL scheduling unit 217, a UL scheduling unit 219, a control data creation unit 221, and a cell management unit 223. Further, in the present embodiment, since an example in which the base station apparatus 3 has five cells is shown, the transmission processing unit 203, the reception processing unit 205, and the preamble detection unit 211 are configured to have five each.
  • the transmission data control unit 207 transmits user data and control data according to an instruction from the control unit 213, and transmits control data to the downlink component carrier downlink control channel PDCCH, downlink synchronization channel DSCH, downlink pilot channel DPiCH of each cell.
  • PDCCH downlink component carrier downlink control channel
  • DSCH downlink synchronization channel
  • DPiCH downlink pilot channel DPiCH of each cell.
  • Channel PBCH and downlink shared channel PDSCH are mapped, and transmission data for each mobile station apparatus 1 is mapped to downlink shared channel PDSCH.
  • the transmission processing units 203-1 to 203-5 modulate / encode transmission data, perform serial / parallel conversion on the input signal, perform OFDM signal processing such as IFFT conversion, CP insertion, and filtering, and generate an OFDM signal.
  • the radio unit 201 up-converts the OFDM-modulated data to a radio frequency and transmits it to the mobile station apparatus 1. Also, the radio unit 201 receives uplink data from the mobile station apparatus 1, down-converts it to a baseband signal, and converts the received signal into reception processing units 205-1 to 205-5 or a preamble detection unit 211. -1 to 211-5.
  • the reception processing units 205-1 to 205-5 demodulate data by performing demodulation processing in consideration of transmission processing performed by the mobile station apparatus 1 from uplink scheduling information from the control unit 213. Also, the reception processing units 205-1 to 205-5 measure the radio channel characteristics from the uplink pilot channel UPiCH, and pass the result to the scheduling unit 215.
  • the uplink communication scheme is assumed to be a single carrier scheme such as DFT-spread OFDM, but a multicarrier scheme such as the OFDM scheme may be used.
  • the control data extraction unit 209 confirms the correctness of the received data and notifies the scheduling unit 215 of the confirmation result. If the received data is correct, the received data is separated into user data and control data. Based on the instruction from the scheduling unit 215, the control unit 213 performs the radio unit 201, transmission processing units 203-1 to 203-5, reception processing units 205-1 to 205-5, transmission data control unit 207, and control data extraction. The unit 209 is controlled.
  • the scheduling unit 215 includes a DL scheduling unit 217 that performs downlink scheduling, a UL scheduling unit 219 that performs uplink scheduling, a control data creation unit 221, and a cell management unit 223, and the DL scheduling unit 217 includes the mobile station apparatus 1.
  • User data and control data are mapped to each downlink channel from downlink radio propagation path information notified from the user, data information of each user notified from the upper layer, and control data created by the control data creation unit 221 Schedule to do.
  • the UL scheduling unit 219 maps user data to each uplink channel from the uplink radio channel estimation results from the reception processing units 205-1 to 205-5 and the radio resource allocation request from the mobile station apparatus 1. And the scheduling result is passed to the control unit 213.
  • the uplink shared channel PUSCH is allocated, and the assigned uplink shared channel PUSCH and preamble number (sequence number) are sent to the control data creation unit 221. Notice.
  • the cell management unit 223 manages system information of each cell and each cell (physical channel configuration information, transmission power information of each channel, information on random access, etc.). In addition, the cell management unit 223 allocates a cell to the mobile station apparatus 1 and determines a cell that permits random access among the allocated cells. Then, the system information is passed to the control data creation unit 221 so as to notify the system information of the allocated cell.
  • the system information of the cells that allow random access includes random access information (random access channel RACH arrangement information, random access preamble generation information, random access preamble maximum transmission count, random access preamble transmission power, etc. The information regarding the random access is not included in the system information of the cell that does not permit the random access, including the transmission information of the access preamble.
  • the cell management unit 223 selects the position of the dedicated sequence (dedicated preamble) random access channel RACH and makes the selected dedicated sequence number and random access channel number control data when the mobile station apparatus 1 performs random access.
  • the data is passed to the creation unit 221.
  • the control data creation unit 221 creates control data arranged on the downlink control channel PDCCH and control data arranged on the downlink shared channel PDSCH.
  • Control message including scheduling information, ACK / NACK of uplink data, system information message including physical channel configuration information, transmission power information of each channel, information on random access, etc., configuration information of cells to be used (related to random access)
  • Initial setting message including information
  • random access response message including preamble number, transmission timing information and scheduling information, contention resolution message, dedicated sequence number and random access channel number and random access instruction message, etc. Create control data.
  • the preamble detection units 211-1 to 211-5 calculate a transmission timing deviation amount from the detected random access preamble, detect the cell from which the random access preamble is detected, and the detected preamble The number (sequence number) and the transmission timing deviation amount are reported to the scheduling unit 215.
  • the base station apparatus 3 allocates one or more cells having different frequencies that meet the communication capability and communication conditions of the mobile station apparatus 1 from among a plurality of cells, and the mobile station apparatus 1 Data is transmitted / received in the allocated cell.
  • the mobile station apparatus 1 may be connected to the base station apparatus 3 via a repeater as shown in FIG. In such a case, the reception timing of the downlink component carrier in the mobile station apparatus 1 may differ for every cell.
  • the transmission timing to the base station apparatus 3 may be different for each uplink component carrier of each cell. When the transmission timing to the base station apparatus 3 is different for each uplink component carrier, the mobile station apparatus 1 needs to adjust the transmission timing for each uplink component carrier of each cell.
  • the base station device 3 groups cells having the same transmission timing from the mobile station device 1 (hereinafter referred to as a transmission timing cell group). Then, the base station apparatus 3 permits random access to one cell in the transmission timing cell group. And only for cells that allow random access, information on random access in the system information (random access channel RACH arrangement information, random access preamble generation information, maximum random access preamble transmission count, transmission of random access preamble) (Including power information) is notified to the mobile station apparatus 1. By doing in this way, since the mobile station apparatus 1 cannot perform random access with respect to the cell which does not have the information regarding random access, execution of random access can be restrict
  • the system information refers to information constituting a cell such as configuration information of uplink / downlink physical channels and transmission information of uplink / downlink physical channels.
  • the random access information includes random access channel RACH allocation information, information for generating a random access preamble, random access preamble transmission related information such as the maximum number of transmissions and transmission power information of the random access preamble. Indicates the information necessary to execute the procedure.
  • the base station apparatus 3 permits both the contention-based random access and the non-contention-based random access to one cell of the cells that allow the mobile station apparatus 1 to perform random access, and performs other random access.
  • Non-contention based random access is allowed for the cell to be allowed.
  • the mobile station apparatus 1 cannot execute random access to a cell that is allowed only non-contention based random access unless there is an instruction from the base station apparatus 3, so Can be limited.
  • random access to be permitted may be specified for each transmission timing cell group. That is, the base station apparatus 3 allows the mobile station to permit both random access of contention-based random access and non-contention-based random access, or non-contention-based random access for each cell that permits random access. Execution of random access from the device 1 can also be restricted. Further, the base station apparatus 3 may be able to select only contention based random access.
  • the base station apparatus 3 is composed of cell # 1 to cell # 5 as shown in FIG. 3A, and cell # 1 to cell # 3 are cell groups having the same transmission timing, and cell # 4 Suppose that cell # 5 is a cell group having the same transmission timing.
  • the mobile station apparatus 1-1 performs a cell search and finds one cell of the base station apparatus 3.
  • cell # 1 is found.
  • the mobile station apparatus 1-1 acquires system information (cell physical channel configuration, transmission power information, information on random access, etc.) of the cell # 1 from the broadcast channel PBCH of the cell # 1.
  • the mobile station apparatus 1-1 transmits a random access preamble to the random access channel RACH of the cell # 1 for initial access using information regarding random access included in the system information.
  • the mobile station apparatus 1-1 acquires random access response information including transmission timing information for the cell # 1 from the base station apparatus 3, sets the transmission timing of the uplink component carrier for the cell # 1, and transmits Start the timing timer.
  • Mobile station apparatus 1-1 transmits message 3 to base station apparatus 3 via cell # 1.
  • the message 3 is transmitted including the contents indicating the initial access.
  • the mobile station apparatus 1-1 receives the contention resolution from the base station apparatus 3, the mobile station apparatus 1-1 ends the contention based random access procedure.
  • the base station device 3 assigns a cell to be used by the mobile station device 1-1 and notifies the system information of the cell to be used by the mobile station device 1-1. In addition, the base station apparatus 3 notifies the information regarding random access included in the system information only to the cell permitting random access for each transmission timing cell group. The mobile station apparatus 1-1 recognizes that the random access is permitted for the cell in which the information related to the random access is included in the system information in the allocated cell. Further, the base station device 3 notifies the cell permitting random access of information permitting random access of both contention-based random access and non-contention-based random access, or information permitting non-contention-based random access. To do.
  • the base station apparatus 3 notifies only one piece of information permitting random access of both contention-based random access and non-contention-based random access to one cell that allows random access.
  • ⁇ 1 may recognize that other random access-permitted cells are allowed only non-contention based random access.
  • base station apparatus 3 assigns cell # 1 to cell # 5 to mobile station apparatus 1-1, and contention based random access and non-contention based random access are assigned to cell # 1. Access is allowed and non-contention based random access is allowed for cell # 5. Also, the base station apparatus 3 notifies the mobile station apparatus 1-1 of setting information such as system information of the allocated cell and group information of the transmission timing cell group. Note that the base station apparatus 3 notifies the mobile station apparatus 1-1 without including information on random access in the system information of a cell that does not permit random access. Here, the base station apparatus 3 does not notify the mobile station apparatus 1-1 of information regarding random access for the cells # 2, 3, and 4. The mobile station apparatus 1-1 recognizes that random access is not permitted for a cell in which information related to random access is not included in the system information in the allocated cell.
  • the mobile station apparatus 1-1 transmits the uplink transmission timings of the cell # 2 and the cell # 3 in the same transmission timing cell group as the cell # 1. As such, the transmission timing of cell # 1 is set. Thereafter, data is exchanged between the mobile station apparatus 1-1 and the base station apparatus 3 via the downlink component carriers of cell # 1 to cell # 5 and the uplink component carriers of cell # 1 to cell # 3. Is done.
  • the base station apparatus 3 When the amount of data transmitted from the mobile station apparatus 1-1 increases and there is a cell that is not used by the mobile station apparatus 1-1, the base station apparatus 3 performs non-contention based random access to the cell that permits random access.
  • Random access instruction information for instructing access is notified by the downlink control channel PDCCH.
  • the base station apparatus 3 notifies the mobile station apparatus 1-1 of random access instruction information for the cell # 5.
  • the random access instruction information includes a preamble number and a random access channel number.
  • the random access preamble is transmitted to the random access channel RACH of cell # 5 using the preamble and random access channel specified by the station apparatus 3.
  • the base station apparatus 3 notifies random access instruction information by the downlink component carrier of the cell used as random access object.
  • the base station apparatus 3 When the base station apparatus 3 detects the random accelerator preamble, the base station apparatus 3 calculates the transmission timing from the random accelerator preamble, and makes the mobile station apparatus 1-1 access the random access including the transmission timing information via the downlink component carrier of the cell # 5. Notify the response.
  • the mobile station device 1-1 sets the transmission timing included in the random access response as the uplink transmission timing of the cell # 5, and further, cell # 4, which is the same transmission timing cell group Is set as the uplink transmission timing, and the transmission timing timer is started. Then, the mobile station apparatus 1-1 completes the non-contention based random access procedure. Thereafter, data is exchanged between the mobile station apparatus 1-1 and the base station apparatus 3, including the uplink component carriers of the cell # 4 and the cell # 5.
  • the mobile station apparatus 1-1 has one transmission timing timer for each transmission timing cell group, and starts or restarts the transmission timing timer when receiving the transmission timing information. While the transmission timing timer is in operation, uplink synchronization is established (transmission timing is valid), and uplink transmission on the uplink component carrier of the target transmission timing cell group is possible. The state in which the timer is stopped is an uplink out-of-synchronization state (transmission timing is invalid), and uplink data transmission on the uplink component carrier of the target transmission timing cell group excludes random access preamble transmission. Is impossible.
  • the mobile station apparatus 1-1 does not execute the random access procedure when receiving random access instruction information for a cell other than a cell for which random access is permitted. Similarly, when random access instruction information instructing contention based random access is received for a cell in which only non-contention based random access is permitted, the random access procedure is not executed.
  • the mobile station apparatus 1-1 has no uplink shared channel PUSCH assignment from the base station apparatus 3 and is in uplink synchronization (transmission timing is valid) or is not uplink synchronized (transmission)
  • contention-based random access is executed as a scheduling request.
  • the mobile station apparatus 1-1 selects a cell in which contention-based random access is permitted for the uplink component carrier of the cell used for random access.
  • cell # 1 selects cell # 1.
  • the mobile station device 1-1 selects one random sequence using information on the random access of the cell for which contention-based random access is permitted, generates a random access preamble, and randomly selects cell # 1.
  • a random access preamble is transmitted to the accelerator channel RACH.
  • the mobile station apparatus 1-1 When receiving the random access response from the base station apparatus 3 via the downlink component carrier of the cell # 1, the mobile station apparatus 1-1 receives the transmission timing information acquired when the random access response is received and transmits the uplink transmission timing information of the cell # 1. The transmission timing is set, and further, the transmission timing is set as the uplink transmission timing of cell # 2 and cell # 3 in the same group, and the transmission timing timer is started. Then, the mobile station device 1-1 includes the transmission buffer status information of the mobile station device 1-1 in the message 3, and notifies the base station device 3 of the message 3. When the mobile station apparatus 1-1 receives the contention resolution from the base station apparatus 3, the mobile station apparatus 1-1 ends the contention based random access.
  • the base station apparatus 3 may change the cell that permits random access depending on the access status of the random access channel RACH.
  • the base station device 3 When changing the cell for which random access is permitted, the base station device 3 notifies the mobile station device 1-1 of information related to the random access of the cell for which random access is newly permitted.
  • the mobile station apparatus 1-1 sets the information regarding the acquired random access, and deletes the information regarding the previous random access.
  • base station apparatus 3 notifies mobile station apparatus 1-1 of information related to random access of cell # 4.
  • the mobile station apparatus 1-1 receives the information regarding the random access of the cell # 4
  • the mobile station apparatus 1-1 sets the information regarding the random access of the cell # 4 and deletes the information regarding the random access of the cell # 5.
  • the mobile station apparatus 1-1 recognizes that the random access permitted cell in the same transmission timing cell group has been changed, and non-contention based random access is permitted for the random access to the cell # 4. Set as being.
  • the mobile station apparatus 1-1 does not change the setting of the random access permitted cells in different transmission timing cell groups.
  • information indicating the permitted random access procedure is also notified.
  • the mobile station apparatus 1-1 receives random access instruction information for a cell in which another non-contention based random access is permitted from the base station apparatus 3 during the process of the contention based random access procedure, The contention-based random access process is continued and the random access instruction information from the base station apparatus 3 is ignored, or the contention-based random access process being processed is canceled and the random access instruction information from the base station apparatus 3 is canceled. Random access is performed in the designated cell according to. In addition, when random access instruction information in another cell is received during random access processing from the random access instruction information from the base station apparatus 3, the first random access instruction is prioritized and the subsequent random access instruction information is ignored. To do. In this way, the mobile station apparatus 1-1 does not execute a plurality of random access processes simultaneously.
  • the mobile station device 1-1 performs random access. Judge as failure. However, regarding the random access of a cell that is permitted non-contention based random access, even when the number of transmissions of the random access preamble exceeds the maximum number of transmissions, the mobile station apparatus 1-1 does not determine that the random access has failed. To do. With this configuration, it is possible to make it difficult for random access failures to occur.
  • contention-based random access and non-contention-based random access are permitted for one cell of one transmission timing cell group, and non-contention-based random access is performed for one cell for each other transmission timing cell group.
  • contention-based random access may be random access by a scheduling request
  • non-contention-based random access may be random access by random access instruction information. That is, random access by a scheduling request and random access by random access instruction information are permitted for one cell of one transmission timing cell group, and random access instruction information for one cell for each other transmission timing cell group Random access can be restricted even if random access is permitted.
  • the configuration of the mobile station apparatus 1 according to the second embodiment of the present invention is the same as that in FIG.
  • the mobile station apparatus 1 includes a radio unit 101, transmission processing units 103-1 to 103-5, reception processing units 105-1 to 105-5, a transmission data control unit 107, a control data extraction unit 109, and a random access preamble generation unit 111. , Transmission timing adjustment units 113-1 to 113-5, a control unit 115, and a scheduling unit 117.
  • the scheduling unit 117 includes a control data analysis unit 119, a UL scheduling unit 121, a control data creation unit 123, and a cell management unit 125.
  • the transmission processing unit 103, the reception processing unit 105, and the transmission timing adjustment unit 113 are each provided with five units. Yes.
  • Radio section 101 transmission processing sections 103-1 to 103-5, reception processing sections 105-1 to 105-5, transmission data control section 107, control data extraction section 109, random access preamble generation section 111, transmission timing adjustment section 113 -1 to 113-5 and the control unit 115 are the same as those described with reference to FIG.
  • the scheduling unit 117 includes a control data analysis unit 119, a UL scheduling unit 121, a control data creation unit 123, and a cell management unit 125.
  • the control data creation unit 123 creates control data and creates a response of the downlink data received by the control data extraction unit 109.
  • the control data analysis unit 119 analyzes the control data from the control data extraction unit 109.
  • the control data analysis unit 119 passes the cell system information, cell allocation information, random access response message, and random access instruction information received from the base station apparatus 3 to the cell management unit 125, and information on random access included in the system information. To the random access preamble generation unit 111.
  • the UL scheduling unit 121 controls the transmission data control unit 107 based on the scheduling information of the uplink data. Further, the cell management unit 125 is instructed to perform random access based on control information from an upper layer.
  • the cell management unit 125 manages cells set from the base station apparatus 3 and manages system information such as the physical channel configuration, transmission power information, and information related to random access for each cell notified from the base station apparatus 3. . Further, the cell management unit 125 manages the operation of the mobile station device 1 for each of the first cell, the second cell, and the third cell.
  • a cell to which a random access preamble is transmitted is determined and passed from the reception processing units 105-1 to 105-5 using information on the random access of the cell used for random access.
  • a sequence to be used is randomly selected based on the downlink radio propagation path characteristic information and the transmission data size of the message 3, and the selected cell information and sequence number (preamble number) are notified to the random access preamble generation unit 111. . Details of random access will be described later.
  • the cell management unit 125 When the cell management unit 125 confirms the content of the random access response passed from the control data analysis unit 119 and detects the preamble number of the transmitted random access preamble, the cell management unit 125 associates the transmission timing information with the randomly accessed cell. The data is transferred to any of the transmission timing adjustment units 113-1 to 113-5, and the assigned radio resource information is transferred to the UL scheduling unit 121. When the contention resolution message is confirmed, the random access procedure is terminated. Further, the sequence number (preamble number) and the random access channel number are extracted from the random access instruction information passed from the control data analysis unit 119, and the cell information, the sequence number (preamble number) and the random access are extracted to the random access preamble generation unit 111. Pass the channel number.
  • the sequence selected by the mobile station apparatus 1 is indicated as a random sequence (random preamble), and the sequence designated by the base station apparatus 3 is indicated as a dedicated sequence (dedicated preamble).
  • the mobile station apparatus 1 performs random access using the uplink component carrier of the cell that has received the random access instruction information.
  • the mobile station device 1 selects a sequence from a random sequence.
  • the configuration of the base station apparatus 3 according to the second embodiment of the present invention is the same as in FIG.
  • the base station apparatus 3 includes a radio unit 201, transmission processing units 203-1 to 203-5, reception processing units 205-1 to 205-5, a transmission data control unit 207, a control data extraction unit 209, and a preamble detection unit 211-1. 211-5, a control unit 213, and a scheduling unit 215 (base station side scheduling unit).
  • the scheduling unit 215 includes a DL scheduling unit 217, a UL scheduling unit 219, a control data creation unit 221, and a cell management unit 223. Further, in the present embodiment, since an example in which the base station apparatus 3 has five cells is shown, the transmission processing unit 203, the reception processing unit 205, and the preamble detection unit 211 are configured to have five each.
  • Radio unit 201 transmission processing units 203-1 to 203-5, reception processing units 205-1 to 205-5, transmission data control unit 207, control data extraction unit 209, preamble detection units 211-1 to 211-5, control
  • the operation of the unit 213 is the same as that described with reference to FIG.
  • the scheduling unit 215 includes a DL scheduling unit 217 that performs downlink scheduling, a UL scheduling unit 219 that performs uplink scheduling, a control data creation unit 221, and a cell management unit 223, and the DL scheduling unit 217 includes the mobile station apparatus 1.
  • User data and control data are mapped to each downlink channel from downlink radio propagation path information notified from the user, data information of each user notified from the upper layer, and control data created by the control data creation unit 221 Schedule to do.
  • the UL scheduling unit 219 maps user data to each uplink channel from the uplink radio channel estimation results from the reception processing units 205-1 to 205-5 and the radio resource allocation request from the mobile station apparatus 1. And the scheduling result is passed to the control unit 213.
  • the uplink shared channel PUSCH is allocated, and the assigned uplink shared channel PUSCH and preamble number (sequence number) are sent to the control data creation unit 221. Notice.
  • the cell management unit 223 manages system information of each cell and each cell (physical channel configuration information, transmission power information of each channel, information on random access, etc.). Moreover, the cell management part 223 allocates a cell to the mobile station apparatus 1, and determines a 1st cell, a 2nd cell, and a 3rd cell with respect to the allocated cell. Then, the cell management unit 223 passes the system information to the control data creation unit 221 so as to notify the system information of the allocated cell.
  • the system information of the first cell and the second cell includes information related to random access (random access channel RACH arrangement information, random access preamble generation information, random access preamble maximum transmission count, random access preamble transmission power, etc.
  • the cell management unit 223 selects the position of the dedicated sequence (dedicated preamble) random access channel RACH and makes the selected dedicated sequence number and random access channel number control data when the mobile station apparatus 1 performs random access.
  • the data is passed to the creation unit 221.
  • the control data creation unit 221 creates control data arranged on the downlink control channel PDCCH and control data arranged on the downlink shared channel PDSCH.
  • Control message including scheduling information, ACK / NACK of uplink data, system information message including physical channel configuration information, transmission power information of each channel, information on random access, etc., configuration information of cells to be used (related to random access)
  • Initial setting message including information
  • random access response message including preamble number, transmission timing information and scheduling information, contention resolution message, dedicated sequence number and random access channel number and random access instruction message, etc. Create control data.
  • the base station apparatus 3 divides a plurality of cells into a plurality of transmission timing cell groups having the same transmission timing. And when allocating a some cell to the mobile station apparatus 1, the base station apparatus 3 sets one cell of one transmission timing cell group as a 1st cell among several transmission timing cell groups. And one cell for every other transmission timing cell group is set as a 2nd cell, and cells other than a 1st cell and a 2nd cell are set as a 3rd cell.
  • the base station device 3 is configured to allow contention-based random access and non-contention-based random access to the first cell. Moreover, the base station apparatus 3 notifies the update information of the system information of each cell via the first cell, and the uplink control channel PUCCH used by the mobile station apparatus 1 on the uplink control channel PUCCH of the first cell. Place.
  • the base station device 3 is configured to allow non-contention based random access to the second cell. Moreover, the base station apparatus 3 notifies transmission timing information via a 1st cell and a 2nd cell.
  • the base station device 3 is configured not to allow random access to the third cell. Moreover, the mobile station apparatus 1 determines the random access failure in the first cell, and does not determine the random access failure in the second cell. Then, the mobile station apparatus 1 determines a downlink radio quality error in the first cell, and does not determine a downlink radio quality error in the second cell and the third cell.
  • the base station apparatus 3 is composed of cell # 1 to cell # 5 as shown in FIG. 4A, and cell # 1 to cell # 2 are cell groups having the same transmission timing (first transmission timing Cell # 3 to cell # 4 are cell groups having the same transmission timing (second transmission timing cell group), and cell # 5 is a cell group having the same transmission timing (third transmission timing cell group). ).
  • the mobile station apparatus 1-1 performs a cell search and finds one cell of the base station apparatus 3.
  • the mobile station apparatus 1-1 acquires system information (cell physical channel configuration, transmission power information, information on random access, etc.) of the cell # 2 from the broadcast channel PBCH of the cell # 2.
  • system information cell physical channel configuration, transmission power information, information on random access, etc.
  • mobile station apparatus 1-1 uses the information on random access included in the system information to transmit a random access preamble to random access channel RACH of cell # 2 for initial access.
  • the mobile station apparatus 1-1 acquires random access response information including transmission timing information for the cell # 2 from the base station apparatus 3, sets the transmission timing of the uplink component carrier for the cell # 2, and transmits Start the timing timer.
  • Mobile station apparatus 1-1 transmits message 3 to base station apparatus 3 via cell # 2.
  • the message 3 is transmitted including the contents indicating the initial access.
  • the mobile station apparatus 1-1 ends the contention based random access procedure.
  • the base station device 3 assigns cells to be used by the mobile station device 1-1, and simultaneously sets the first cell, the second cell, and the third cell.
  • base station apparatus 3 assigns cell # 1 to cell # 5 to mobile station apparatus 1-1
  • cell # 2 is the first cell
  • cell # 4 and cell # 5 are the first cells.
  • Two cells, cell # 1 and cell # 3 are set as the third cell.
  • the base station apparatus 3 notifies the mobile station apparatus 1-1 of setting information such as system information of the allocated cell and group information of the transmission timing cell group.
  • the base station apparatus 3 notifies the mobile station apparatus 1 including information on random access in the system information of the first cell and the second cell, and information on random access in the system information of the third cell. Not including it is notified to the mobile station apparatus 1-1. That is, the base station apparatus 3 does not notify the mobile station apparatus 1-1 of the information regarding random access for the cells # 1 and # 3.
  • the first cell setting information includes uplink control channel PUCCH allocation information.
  • the mobile station device 1-1 sets the transmission timing of the cells of the same transmission timing cell group.
  • the mobile station apparatus 1-1 sets the transmission timing of the cell # 2 as the uplink transmission timing of the cell # 1.
  • user data is exchanged between the mobile station apparatus 1-1 and the base station apparatus 3 via the downlink component carrier of the cell # 1 to cell # 5 and the uplink component carrier of the cell # 1 to cell # 2. Is done.
  • the base station device 3 instructs the mobile station device 1-1 to perform non-contention based random access to the second cell.
  • the instruction information is reported on the downlink control channel PDCCH.
  • the base station apparatus 3 notifies the mobile station apparatus 1-1 of random access instruction information for the cell # 4.
  • the random access instruction information includes a preamble number and a random access channel number.
  • the random access preamble is transmitted to the random access channel RACH of cell # 4 using the preamble and random access channel specified by the station apparatus 3.
  • the base station apparatus 3 When the base station apparatus 3 detects the random accelerator preamble, the base station apparatus 3 calculates the transmission timing from the random accelerator preamble, and makes the mobile station apparatus 1-1 a random access including the transmission timing information via the downlink component carrier of the cell # 4. Notify the response. Upon receiving the random access response, the mobile station device 1-1 sets the transmission timing included in the random access response as the uplink transmission timing of the cell # 4, and further, cell # 3, which is the same transmission timing cell group Is set as the uplink transmission timing, and the transmission timing timer is started. Then, the mobile station device 1-1 ends the non-contention based random access procedure. Thereafter, data is exchanged between the mobile station apparatus 1-1 and the base station apparatus 3, including the uplink component carriers of the cell # 3 and the cell # 4.
  • the base station apparatus 3 When the base station apparatus 3 further needs a cell to be used for uplink transmission, the base station apparatus 3 instructs the mobile station apparatus 1-1 to perform non-contention based random access to the cell # 5 of the second cell. Information is reported on the downlink control channel PDCCH of cell # 5.
  • the mobile station apparatus 1-1 has one transmission timing timer for each transmission timing cell group, and starts or restarts the transmission timing timer when receiving the transmission timing information. While the transmission timing timer is in operation, uplink synchronization is established (transmission timing is valid), and uplink transmission on the uplink component carrier of the target transmission timing cell group is possible. The state in which the timer is stopped is a state in which uplink synchronization is lost (transmission timing is invalid), and uplink transmission on the uplink component carrier of the target transmission timing cell group is impossible.
  • the mobile station device 1-1 does not execute the random access procedure when receiving random access instruction information for the third cell. Similarly, when the random access instruction information instructing the contention based random access is received for the second cell, the random access procedure is not executed.
  • the mobile station apparatus 1-1 has no uplink shared channel PUSCH assignment from the base station apparatus 3 and is in uplink synchronization (transmission timing is valid) or is not uplink synchronized (transmission)
  • uplink transmission data is newly generated in a state where the timing is not valid
  • contention-based random access is executed as a scheduling request.
  • the mobile station apparatus 1-1 selects the first cell.
  • mobile station apparatus 1-1 selects cell # 2. Then, using the information on the random access of the first cell, one random sequence is selected, a random access preamble is generated, and the random access preamble is transmitted to the random access channel RACH of the first cell.
  • the mobile station apparatus 1-1 When receiving the random access response from the base station apparatus 3 via the downlink component carrier of the first cell, the mobile station apparatus 1-1 transmits the transmission timing information included in the random access response to the uplink of the first cell.
  • the transmission timing is set, and further, the transmission timing is set as the uplink transmission timing of the cells having the same transmission timing, and the transmission timing timer is started.
  • the mobile station device 1-1 includes the transmission buffer status information of the mobile station device 1-1 in the message 3, and notifies the base station device 3 of the message 3.
  • the mobile station apparatus 1-1 receives the contention resolution from the base station apparatus 3, the mobile station apparatus 1-1 ends the contention based random access.
  • the base station apparatus 3 may change the first cell or the second cell depending on the wireless propagation path state or the communication state.
  • the base station apparatus 3 notifies the mobile station apparatus 1-1 of the allocation information of the uplink control channel PUCCH to the new first cell and the information regarding the random access of the new first cell.
  • the mobile station apparatus 1-1 sets the acquired uplink control channel PUCCH allocation information and information related to random access, releases the uplink PUCCH radio resources allocated in the old first cell, and sets the old first cell Delete information about random access. Also, the mobile station apparatus 1-1 recognizes the change of the first cell by being assigned the uplink control channel PUCCH.
  • the base station device 3 When changing the second cell, the base station device 3 notifies the mobile station device 1-1 of information related to the random access of the new second cell.
  • the mobile station apparatus 1-1 sets the acquired information regarding the random access, and deletes the information regarding the random access of the old second cell. Also, the mobile station apparatus 1-1 recognizes the change of the second cell because the uplink control channel PUCCH is not assigned.
  • the base station device 3 sends the uplink control channel PUCCH allocation information of the cell # 1 and information related to the random access of the cell # 1 to the mobile station device 1. -1.
  • the mobile station apparatus 1-1 receives the uplink control channel, assignment information, and information related to random access for cell # 1, it sets information related to random access for cell # 1, and performs uplink control assigned to cell # 2.
  • the radio resource of channel PUCCH is released, and information regarding random access of cell # 2 is deleted.
  • the mobile station apparatus 1-1 When the mobile station apparatus 1-1 receives random access instruction information for the first cell or the second cell from the base station apparatus 3 during the random access procedure, the random access process being processed is continued. Then, the random access instruction information from the base station apparatus 3 is ignored, or the random access process being processed is stopped, and the random access is executed in the cell instructed according to the random access instruction information from the base station apparatus 3. In this way, the mobile station apparatus 1-1 does not execute a plurality of random access processes simultaneously.
  • the mobile station device 1-1 determines that the random access has failed.
  • the mobile station apparatus 1-1 does not determine that the random access has failed. With this configuration, it is possible to make it difficult for random access failures to occur.
  • contention-based random access and non-contention-based random access are permitted for the first cell, and non-contention-based random access is permitted for the second cell, thereby restricting random access.
  • contention-based random access may be random access based on scheduling requests
  • non-contention-based random access may be random access based on random access instruction information.
  • random access is restricted even if random access by scheduling request and random access by random access instruction information are permitted for the first cell and random access by random access instruction information is permitted for the second cell. It is possible to do.
  • 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 parts of the mobile station device 1-1 and the base station device 3 or these
  • the mobile station apparatus 1 and the base station apparatus are recorded by recording a program for realizing a part of the functions in a computer-readable recording medium, causing the computer system to read and execute the program recorded in the recording medium.
  • the control 3 may be performed.
  • the “computer system” here includes an OS and hardware such as peripheral devices.
  • the “computer-readable recording medium” means a storage device such as a flexible disk, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system.
  • the “computer-readable recording medium” means that a program is dynamically held for a short time, like a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In this case, it is intended to include those that hold a program for a certain period of time, such as a volatile memory inside a computer system serving as a server or a client in that case.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system. .
  • 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.
  • the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • an integrated circuit based on the technology can also be used.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
PCT/JP2011/066740 2010-08-06 2011-07-22 基地局装置、移動局装置、移動通信システム、通信方法、制御プログラムおよび集積回路 Ceased WO2012017841A1 (ja)

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CN201180038273.XA CN103053208B (zh) 2010-08-06 2011-07-22 基站装置、移动站装置、移动通信系统、通信方法、控制程序及集成电路
EP11814471.6A EP2603048B1 (en) 2010-08-06 2011-07-22 Base station apparatus, mobile station apparatus, mobile communication system, communication method, control program and integrated circuit
US13/814,424 US9094989B2 (en) 2010-08-06 2011-07-22 Base station apparatus, mobile station apparatus, mobile communication system, communication method, control program, and integrated circuit
US14/754,004 US9538556B2 (en) 2010-08-06 2015-06-29 Base station apparatus, mobile station apparatus, mobile communication system, communication method, control program, and integrated circuit
US15/341,734 US10433340B2 (en) 2010-08-06 2016-11-02 Base station apparatus, mobile station apparatus, and communication method
US16/532,129 US10887925B2 (en) 2010-08-06 2019-08-05 Mobile station apparatus

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US14/754,004 Continuation US9538556B2 (en) 2010-08-06 2015-06-29 Base station apparatus, mobile station apparatus, mobile communication system, communication method, control program, and integrated circuit

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US20190364604A1 (en) 2019-11-28
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US9538556B2 (en) 2017-01-03
US20150319785A1 (en) 2015-11-05
US9094989B2 (en) 2015-07-28
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US10433340B2 (en) 2019-10-01
EP2603048A4 (en) 2016-02-17
US20130215848A1 (en) 2013-08-22
US20170079072A1 (en) 2017-03-16
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