WO2015025738A1 - 無線通信システム、基地局装置、端末装置、無線通信方法および集積回路 - Google Patents
無線通信システム、基地局装置、端末装置、無線通信方法および集積回路 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
Definitions
- the present invention relates to a radio communication system, a base station apparatus, and a terminal apparatus, and more particularly to a radio communication system, a base station apparatus, a terminal apparatus, a radio communication method, and an integrated circuit related to data transmission / reception control.
- the W-CDMA system is standardized as a third generation cellular mobile communication system, and services are provided. Also, HSDPA with higher communication speed has been standardized and is being serviced.
- EUTRA Evolved Universal Terrestrial Radio Access
- OFDM Orthogonal Frequency Division Division Multiplexing
- PAPR Peak to Average Power Ratio
- Advanced-EUTRA a further evolution of EUTRA.
- communication at a maximum transmission rate of 1 Gbps or more and uplink 500 Mbps or more is performed using a band up to a maximum of 100 MHz bandwidth in uplink and downlink.
- Advanced-EUTRA it is considered to realize a maximum of 100 MHz band by bundling a plurality of bands compatible with EUTRA so as to accommodate EUTRA mobile station apparatuses.
- one band of 20 MHz or less of EUTRA is called a component carrier (Component Carrier: CC).
- the component carrier is also called a cell.
- bundling a band of 20 MHz or less is called carrier aggregation (Carrier Aggregation: CA) (Non-patent Document 1).
- Non-Patent Document 2 in communication between a base station apparatus and a mobile station apparatus, when the mobile station apparatus connects simultaneously with a macro cell and a small cell, control information (control plane information: Control-plane information) is transmitted by the macro cell. It has been proposed to transmit user information (User-plane information) in a small cell.
- control plane information control-plane information
- the technology for connecting the macro cell, the small cell, and the mobile station apparatus shown in Non-Patent Document 2 at the same time is also referred to as dual connect (or dual connectivity).
- 3GPP TS Technical Specification 36.300, V11.5.0 (2013-03), Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN), Overall description Stage2 3GPP TR (Technical Report) 36.842, V0.2.0 (2013-05), Study on Small Cell Enhancements for E-UTRA and E-UTRAN-Higher layer aspects (release 12)
- Non-Patent Document 2 in communication between a base station apparatus and a mobile station apparatus, control information is transmitted and received between the base station apparatus of the macro cell and the mobile station apparatus, and the base station apparatus of the small cell and the mobile station When user information is transmitted and received between devices, control information and user information must be controlled to be transmitted in an appropriate cell.
- each of the macro cell base station apparatus and the small cell base station apparatus moves in consideration of the line delay between the base station apparatuses. It is considered that the downlink and uplink data scheduling, downlink data transmission, and control related to data transmission are performed independently for the station apparatus.
- Both base station apparatuses do not know what kind of control the other base station apparatus is performing on the mobile station apparatus. For this reason, uplink transmission timing control related to data transmission performed between one base station device and a mobile station device is performed as transmission timing control between a plurality of base station devices and mobile station devices at the time of dual connection. Is inefficient.
- the present invention has been made in view of such circumstances, and a radio communication system, a base station apparatus, a mobile station apparatus, and a radio communication method for efficiently operating transmission timing related control of a mobile station apparatus during dual connection And an integrated circuit.
- the wireless communication system is a wireless communication system in which a first base station device and a second base station device communicate with a terminal device via a plurality of cells, the plurality of cells Is composed of one or more cells having a first uplink transmission timing, and includes a first group including a first cell belonging to the first base station apparatus, and the first uplink transmission timing, A second group including one or more cells having different second uplink transmission timings and including a second cell belonging to the second base station apparatus, the first uplink transmission timing, and the Consists of one or more first base station apparatuses having a third uplink transmission timing different from the second uplink transmission timing or a third cell belonging to the second base station apparatus Each group is controlled using a transmission timing timer that starts or restarts when transmission timing information is applied for each group. And the transmission timing timer information to the terminal device, the terminal device manages the group based on the information on the group, and
- the 2nd aspect of this invention is a radio
- WHEREIN A terminal device is a cell of said 1st group, when the transmission timing timer of said 1st group expires. And when the transmission HARQ buffer data corresponding to the cell of the third group belonging to the first base station apparatus is erased and the transmission timing timer of the second group expires, the cell of the second group When the transmission HARQ buffer data corresponding to the cell of the third group belonging to the second base station apparatus is erased and the transmission timing timer of the third group expires, the transmission timing timer expires Data in the transmission HARQ buffer corresponding to the third group of cells is erased.
- an uplink control channel is set as a setting for the second cell belonging to the second base station apparatus.
- the terminal device of the 4th aspect of this invention is a terminal device with which a 1st base station apparatus and a 2nd base station apparatus communicate via a several cell, Comprising: A first group including one or more cells having a first uplink transmission timing and including a first cell belonging to the first base station apparatus, and a first group different from the first uplink transmission timing A second group including one or more cells having two uplink transmission timings and including a second cell belonging to the second base station apparatus; and the first uplink transmission timing and the second A third group consisting of one or more first base station apparatuses or third cells belonging to the second base station apparatus having a third uplink transmission timing different from the uplink transmission timing of G And is controlled using a transmission timing timer that starts or restarts when transmission timing information is applied for each group, and information about the group from the first base station apparatus and the transmission timing timer Information is received, the group is managed based on the information about the group, and the group is controlled on a base station apparatus basis.
- the terminal device when the transmission timing timer of the first group expires, the cell and the first base of the first group When the transmission HARQ buffer data corresponding to the third group of cells belonging to the station apparatus is erased and the transmission timing timer of the second group expires, the second group of cells and the second base When the transmission HARQ buffer data corresponding to the third group of cells belonging to the station apparatus is erased and the third group transmission timing timer expires, the third group of cells whose transmission timing timer has expired The data in the transmission HARQ buffer corresponding to is deleted.
- the uplink control channel assigned to the second cell is released.
- the terminal device when the transmission timing timer of the first group is stopped, the random access preamble in the first cell.
- the transmission timing timer of the second group expires, The uplink transmission in the second group of cells other than the random access preamble transmission in the second cell and the third group of cells belonging to the second base station apparatus is prohibited.
- the base station apparatus of the 8th aspect of this invention is a base station apparatus which communicates with a terminal device via a several cell with a 1st base station apparatus, Comprising: The said several cell is 1st.
- a first group including a first cell belonging to the first base station apparatus, and a second group different from the first uplink transmission timing.
- a second group including one or more cells having uplink transmission timing and including a second cell belonging to the own base station apparatus, the first uplink transmission timing, and the second uplink transmission timing Grouped into a third group consisting of one or more first cells having the third uplink transmission timing different from the third cell belonging to the first base station apparatus or the own base station apparatus,
- Each group is controlled using a transmission timing timer that starts or restarts when transmission timing information is applied, from the first base station apparatus to the second group and the first base station apparatus Receive information on the third group and information on the transmission timing timer, and notify the terminal device of information on the first group, the second group, and the third group, and information on the transmission timing timer .
- wireless communications system of the 9th aspect of this invention is a radio
- the plurality of cells are configured of one or more cells having a first uplink transmission timing, and the first group includes a first cell belonging to the first base station apparatus.
- a second group including one or more cells having a second uplink transmission timing different from the first uplink transmission timing and including a second cell belonging to the second base station apparatus;
- the base station apparatus notifies the terminal apparatus of information on the group and information on the transmission timing timer, and the terminal apparatus, when the transmission timing timer of the first group expires, Erasing data in the transmission HARQ buffer corresponding to the cells of the group and the cells of the third group belonging to the first base station apparatus, and when the transmission timing timer of the second group expires, the second Corresponding to the cells of the third group and the cells of the third group belonging to the second base station apparatus. Erasing data in the transmission HARQ buffer and,
- An integrated circuit according to a tenth aspect of the present invention is an integrated circuit applied to a second base station apparatus that communicates with a terminal apparatus via a plurality of cells together with the first base station apparatus.
- the plurality of cells includes one or more cells having a first uplink transmission timing, and includes a first group including a first cell belonging to the first base station apparatus, and the first uplink.
- a second group including one or more cells having a second uplink transmission timing different from the link transmission timing and including a second cell belonging to the second base station apparatus; and the first uplink One or more of the first base station apparatus or the third cell belonging to the second base station apparatus having a transmission timing and a third uplink transmission timing different from the second uplink transmission timing Grouped into a third group to be configured, controlled for each group using a transmission timing timer that starts or restarts when transmission timing information is applied, from the first base station apparatus to the second group Means for receiving information on the third group of the first base station apparatus and information on the transmission timing timer, information on the first group, the second group, and the third group And means for notifying the terminal device of information of the transmission timing timer.
- An integrated circuit according to an eleventh aspect of the present invention is an integrated circuit applied to a terminal apparatus in which a first base station apparatus and a second base station apparatus communicate via a plurality of cells.
- the plurality of cells includes one or more cells having a first uplink transmission timing, and includes a first group including a first cell belonging to the first base station apparatus, and the first uplink.
- a second group including one or more cells having a second uplink transmission timing different from the link transmission timing and including a second cell belonging to the second base station apparatus; and the first uplink Consists of one or more first base station apparatuses having a transmission timing and a third uplink transmission timing different from the second uplink transmission timing or a third cell belonging to the second base station apparatus
- Each group is controlled using a transmission timing timer that starts or restarts when transmission timing information is applied, and information about the group from the first base station device Means for receiving information on the transmission timing timer, means for managing the group based on information on the group, and means for controlling the group in units of base station devices.
- the first group of cells and the first group Means for erasing data in the transmission HARQ buffer corresponding to the third group of cells belonging to the base station apparatus, and the second group of cells and the second group when the second group transmission timing timer expires; Means for erasing data in the transmission HARQ buffer corresponding to the cell of the third group belonging to the second base station apparatus, and when the transmission timing timer of the third group has expired, the transmission timing timer has expired Means for erasing data in the transmission HARQ buffer corresponding to the third group of cells.
- the base station apparatus can perform efficient data scheduling for the mobile station apparatus.
- the OFDM system is adopted as the downlink of EUTRA. Further, a DFT-spread OFDM single carrier communication system is employed as the uplink of EUTRA.
- FIG. 7 is a diagram showing a physical channel configuration of EUTRA.
- the downlink physical channel includes a physical downlink shared channel PDSCH (Physical Downlink Shared Channel), a physical downlink control channel PDCCH (Physical Downlink Control Channel), and a physical broadcast channel PBCH (Physical Broadcast Channel).
- PDSCH Physical Downlink Shared Channel
- PDCCH Physical Downlink Control Channel
- PBCH Physical Broadcast Channel
- there are physical signals such as downlink synchronization signals and downlink reference signals (Non-Patent Document 1).
- the uplink physical channel includes a physical random access channel PRACH (Physical Random Access Channel), a physical uplink shared channel PUSCH (Physical Uplink Shared Channel), and a physical uplink control channel PUCCH (Physical Uplink Control Channel).
- PRACH Physical Random Access Channel
- PUSCH Physical Uplink Shared Channel
- PUCCH Physical Uplink Control Channel
- the uplink reference signal includes a demodulation reference signal (Demodulation Reference Signal: DRS) and a measurement reference signal (Sounding Reference Signal: SRS).
- the measurement reference signal further includes a periodic measurement reference signal (Periodic SRS) and an aperiodic measurement reference signal (Aperiodic SRS).
- the measurement reference signal refers to a periodic measurement reference signal (Non-Patent Document 1).
- FIG. 8 is a diagram illustrating a downlink channel configuration of EUTRA.
- the downlink channels shown in FIG. 8 are each composed of a logical channel, a transport channel, and a physical channel.
- the logical channel defines the type of data transmission service that is transmitted and received in a medium access control (MAC) layer.
- the transport channel defines what characteristics the data transmitted over the air interface has and how it is transmitted.
- a physical channel is a physical channel that carries data conveyed to the physical layer by a transport channel.
- the downlink logical channels include broadcast control channel BCCH (Broadcast Control Channel), paging control channel PCCH (Paging Control Channel), common control channel CCCH (Common Control Channel), dedicated control channel DCCH (Dedicated Control Channel), and dedicated traffic.
- BCCH Broadcast Control Channel
- PCCH Paging Control Channel
- CCCH Common Control Channel
- DCCH dedicated Control Channel
- a channel DTCH Dedicated Traffic Channel
- the downlink transport channels include a broadcast channel BCH (Broadcast Channel), a paging channel PCH (Paging Channel), and a downlink shared channel DL-SCH (Downlink Shared Channel).
- BCH Broadcast Channel
- PCH paging channel
- DL-SCH Downlink Shared Channel
- the downlink physical channels include a physical broadcast channel PBCH (Physical Broadcast Channel), a physical downlink control channel PDCCH (Physical Downlink Control Channel), and a physical downlink shared channel PDSCH (Physical Downlink Shared Channel). These channels are transmitted and received between the base station apparatus and the mobile station apparatus.
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel
- Broadcast control channel BCCH is a downlink channel used to broadcast system control information.
- the paging control channel PCCH is a downlink channel used for transmitting paging information, and is used when the network does not know the cell position of the mobile station apparatus.
- the common control channel CCCH is a channel used for transmitting control information between the mobile station apparatus and the network, and is used by a mobile station apparatus that does not have a radio resource control (RRC) connection with the network. Is done.
- RRC radio resource control
- the dedicated control channel DCCH is a one-to-one (point-to-point) bidirectional channel and is a channel used for transmitting individual control information between the mobile station apparatus and the network.
- the dedicated control channel DCCH is used by a mobile station apparatus having an RRC connection.
- the dedicated traffic channel DTCH is a one-to-one bidirectional channel, is a channel dedicated to one mobile station apparatus, and is used for transferring user information (unicast data).
- the broadcast channel BCH is broadcast to the entire cell in a fixed and predefined transmission format.
- the downlink shared channel DL-SCH supports HARQ (Hybrid Automatic Repeat Request), dynamic adaptive radio link control, and discontinuous reception (DRX: Discontinuous Reception), and needs to be broadcast to the entire cell. .
- HARQ Hybrid Automatic Repeat Request
- DRX Discontinuous Reception
- the paging channel PCH supports DRX and needs to be broadcast to the entire cell.
- the paging channel PCH is mapped to a physical resource that is dynamically used for a traffic channel and other control channels, that is, a physical downlink shared channel PDSCH.
- the physical broadcast channel PBCH maps the broadcast channel BCH with a period of 40 milliseconds.
- the physical downlink control channel PDCCH includes radio resource assignment (downlink assignment) of the downlink shared channel PDSCH, hybrid automatic repeat request (HARQ) information for downlink data, and radio resources of the physical uplink shared channel PUSCH. It is a channel used to notify the mobile station apparatus of uplink transmission permission (uplink grant) that is an assignment.
- the physical downlink shared channel PDSCH is a channel used for transmitting downlink data or paging information.
- the physical downlink control channel PDCCH is arranged in the 1 to 3 symbol OFDM of the resource block from the head of one subframe, and the downlink shared channel PDSCH is arranged in the remaining OFDM symbols.
- One subframe is composed of two resource blocks, and one frame is composed of 10 subframes.
- One resource block is composed of 12 subcarriers and 7 OFDM symbols.
- the base station apparatus when the base station apparatus notifies the mobile station apparatus of radio resource allocation of the physical downlink shared channel PDSCH to the mobile station apparatus using the physical downlink control channel PDCCH, the physical downlink shared channel PDSCH allocated to the mobile station apparatus The region is the physical downlink shared channel PDSCH in the same subframe as the physical downlink control channel PDCCH in which the downlink assignment is notified.
- mapping between the transport channel and the physical channel is performed as follows. Broadcast channel BCH is mapped to physical broadcast channel PBCH. The paging channel PCH and the downlink shared channel DL-SCH are mapped to the physical downlink shared channel PDSCH. The physical downlink control channel PDCCH is used as a physical channel alone.
- mapping between logical channels and transport channels is performed as follows.
- the paging control channel PCCH is mapped to the paging channel PCH.
- Broadcast control channel BCCH is mapped to broadcast channel BCH and downlink shared channel DL-SCH.
- the common control channel CCCH, the dedicated control channel DCCH, and the dedicated traffic channel DTCH are mapped to the downlink shared channel DL-SCH.
- FIG. 9 is a diagram showing an uplink channel configuration of EUTRA.
- the uplink channels shown in FIG. 9 are each composed of a logical channel, a transport channel, and a physical channel. The definition of each channel is the same as the downlink channel.
- the uplink logical channels include a common control channel CCCH (Common Control Channel), a dedicated control channel DCCH (Dedicated Control Channel), and a dedicated traffic channel DTCH (Dedicated Traffic Channel).
- CCCH Common Control Channel
- DCCH dedicated Control Channel
- DTCH dedicated Traffic Channel
- the uplink transport channel includes an uplink shared channel UL-SCH (Uplink Shared Channel) and a random access channel RACH (Random Access Channel).
- UL-SCH Uplink Shared Channel
- RACH Random Access Channel
- the uplink physical channels include a physical uplink control channel PUCCH (Physical Uplink Control Channel), a physical uplink shared channel PUSCH (Physical Uplink Shared Channel) and a physical random access channel PRACH (Physical Random Access Channel). These channels are transmitted and received between the base station apparatus and the mobile station apparatus.
- PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- PRACH Physical Random Access Channel
- the common control channel CCCH is a channel used for transmitting control information between the mobile station apparatus and the network, and is used by a mobile station apparatus that does not have a radio resource control (RRC) connection with the network. Is done.
- RRC radio resource control
- the dedicated control channel DCCH is a one-to-one (point-to-point) bidirectional channel and is a channel used for transmitting individual control information between the mobile station apparatus and the network.
- the dedicated control channel DCCH is used by a mobile station apparatus having an RRC connection.
- the dedicated traffic channel DTCH is a one-to-one bidirectional channel, is a channel dedicated to one mobile station apparatus, and is used for transferring user information (unicast data).
- the uplink shared channel UL-SCH supports HARQ (Hybrid Automatic Repeat Request), dynamic adaptive radio link control, and discontinuous transmission (DTX). Limited control information is transmitted on the random access channel RACH.
- HARQ Hybrid Automatic Repeat Request
- DTX discontinuous transmission
- the physical uplink control channel PUCCH includes response information (ACK (Acknowledge) / NACK (Negative acknowledge)), downlink radio quality information, and uplink data transmission request (scheduling request: Scheduling Request: SR) for downlink data. )
- the physical uplink shared channel PUSCH is a channel used for transmitting uplink data.
- the physical random access channel PRACH is mainly used for random access preamble transmission for acquiring transmission timing information from the mobile station apparatus to the base station apparatus. Random access preamble transmission is performed in a random access procedure.
- the mapping between the transport channel and the physical channel is performed as follows.
- the uplink shared channel UL-SCH is mapped to the physical uplink shared channel PUSCH.
- the random access channel RACH is mapped to the physical random access channel PRACH.
- the physical uplink control channel PUCCH is used as a physical channel alone.
- the logical channel and the transport channel are mapped as follows.
- the common control channel CCCH, the dedicated control channel DCCH, and the dedicated traffic channel DTCH are mapped to the uplink shared channel UL-SCH.
- FIG. 10 shows a protocol stack for handling control data of the mobile station apparatus and base station apparatus of EUTRA.
- FIG. 11 is a protocol stack for handling user data of EUTRA mobile station apparatuses and base station apparatuses. 10 and 11 will be described below.
- the physical layer (Physical layer: PHY layer) provides a transmission service to an upper layer using a physical channel (Physical layer).
- the PHY layer is connected to an upper medium access control layer (Medium Access Control Layer) via a transport channel. Data moves between the MAC layer, the PHY layer, and the layer (layer) via the transport channel. Data transmission / reception is performed between the mobile station apparatus and the base station apparatus via a physical channel.
- Medium Access Control Layer Medium Access Control Layer
- the MAC layer maps various logical channels to various transport channels.
- the MAC layer is connected to an upper radio link control layer (Radio Link Control Layer: RLC layer) through a logical channel.
- RLC layer Radio Link Control Layer
- the logical channel is roughly classified according to the type of information to be transmitted, and is divided into a control channel for transmitting control information and a traffic channel for transmitting user information.
- the MAC layer has a function of controlling the PHY layer to perform intermittent transmission / reception (DRX / DTX), a function of notifying transmission power information, a function of performing HARQ control, and the like.
- the MAC layer also notifies the amount of data in the transmission buffer corresponding to each logical channel (buffer Status Report: BSR)), and makes a radio resource request for transmitting uplink data (scheduling) I have a request (Scheduling Request).
- BSR Buffer Status Report
- the MAC layer executes a random access procedure when performing an initial access or a scheduling request.
- the MAC layer also has a function of controlling the PHY layer to perform cell activation / deactivation when performing carrier aggregation and a function of controlling the PHY layer to manage uplink transmission timing. Yes.
- the RLC layer divides and concatenates the data received from the upper layer, and adjusts the data size so that the lower layer can transmit data appropriately.
- the RLC layer also has a function for guaranteeing QoS (Quality of Service) required by each data. That is, the RLC layer has functions such as data retransmission control.
- the packet data convergence protocol layer (Packet Data Convergence Protocol layer: PDCP layer) has a header compression function that compresses unnecessary control information in order to efficiently transmit IP packets as user data in a wireless section.
- the PDCP layer also has a data encryption function.
- the radio resource control layer defines only control information.
- the RRC layer sets and resets a radio bearer (RB) and controls a logical channel, a transport channel, and a physical channel.
- the RB is divided into a signal radio bearer (Signaling Radio Bearer: SRB) and a data radio bearer (Data Radio Bearer: DRB), and the SRB is used as a path for transmitting an RRC message as control information.
- DRB is used as a route for transmitting user information.
- Each RB is set between the RRC layers of the base station apparatus and the mobile station apparatus.
- the PHY layer corresponds to the first physical layer in the hierarchical structure of the generally known Open Systems Interconnection (OSI) model, and the MAC layer, RLC layer, and PDCP layer are OSI.
- the RRC layer corresponds to the data link layer, which is the second layer of the model, and the network layer, which is the third layer of the OSI model.
- Random access procedures include two access procedures: Contention-based Random Access procedure (contention-based random access procedure) and Non-contention-based Random access procedure (non-contention-based random access procedure) (Non-patent Document 1).
- FIG. 12 is a diagram showing the Contention based Random Access procedure.
- the Contention based Random Access procedure is a random access that may collide between mobile station devices, and the Contention based Random Access procedure is used during initial access or when the base station is not connected (communication) with the base station device. This is performed for a scheduling request or the like when uplink data transmission occurs in the mobile station apparatus while being connected to the apparatus but not in uplink synchronization.
- FIG. 13 is a diagram showing a Non-contention based Random Access procedure.
- Non-contention based Random Access procedure is a random access that does not cause collision between mobile station devices, and moves quickly when the base station device and the mobile station device are connected but the uplink is out of synchronization.
- the mobile station device performs random access when instructed by the base station device in a special case such as when handover or the transmission timing of the mobile station device is not effective.
- Start Non-Patent Document 1).
- the Non-contention based Random Access procedure is instructed by an RRC (Radio Resource Control: Layer 3) layer message and downlink control channel PDCCH control data.
- RRC Radio Resource Control: Layer 3
- the mobile station device 1-1 transmits a random access preamble to the base station device 3-1 (message 1: (1), step S1).
- the base station device 3-1 that has received the random access preamble transmits a response to the random access preamble (random access response) to the mobile station device 1-1 (message 2: (2), step S2).
- the mobile station device 1-1 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 device 3-1 transmits a collision confirmation message to the mobile station device 1-1 that has received the upper layer message of (3) (message 4: (4), step S4).
- Contention based Random Access is also referred to as random preamble transmission.
- the base station apparatus 3-1 notifies the mobile station apparatus 1-1 of the preamble number (or sequence number) and the random access channel number to be used (message 0: (1 '), step S11).
- the mobile station apparatus 1-1 transmits the random access preamble having the designated preamble number to the designated random access channel RACH (message 1: (2 '), step S12).
- the base station device 3-1 that has received the random access preamble transmits a response to the random access preamble (random access response) to the mobile station device 1-1 (message 2: (3 '), step S13).
- the reported preamble number value is 0, Contention based Random Access is performed.
- Non-contention based Random Access is also called dedicated preamble transmission.
- the mobile station apparatus 1-1 acquires the system information of the base station apparatus 3-1 from the broadcast channel PBCH and the like, executes a random access procedure from the random access related information included in the system information, and executes the base station apparatus 3 Connect to -1.
- the mobile station apparatus 1-1 generates a random access preamble from the random access related information in the system information.
- the mobile station apparatus 1-1 transmits a random access preamble using the random access channel RACH (message 1: (1)).
- the base station device 3-1 When the base station device 3-1 detects the random access preamble from the mobile station device 1-1, the base station device 3-1 determines the amount of transmission timing shift between the mobile station device 1-1 and the base station device 3-1 from the random access preamble. Calculate, perform scheduling (designation of uplink radio resource position (position of uplink shared channel PUSCH), transmission format (message size), etc.) to transmit the Layer 2 (L2) / Layer 3 (L3) message, Temporary C- A response (random access response) addressed to the mobile station device 1-1 that has assigned RNTI (Cell-Radio Network Temporary Identity) and transmitted the random access preamble of the random access channel RACH to the downlink control channel PDCCH.
- scheduling designation of uplink radio resource position (position of uplink shared channel PUSCH), transmission format (message size), etc.
- L3 Layer 2
- Temporary C- A response random access response
- RACH Cell-Radio Network Temporary Identity
- A-RNTI Random Access-Radio Network Temporary Identity Identification
- a random access response message is transmitted (message 2: (2)).
- the mobile station apparatus 1-1 When the mobile station apparatus 1-1 detects the presence of RA-RNTI in the downlink control channel PDCCH, the mobile station apparatus 1-1 confirms the contents of the random access response message arranged in the downlink shared channel PDSCH, and transmits the information on the transmitted random access preamble. Is included, the uplink transmission timing is adjusted from the transmission timing information, and C-RNTI (or Temporary C-RNTI) or IMSI (International Mobile Subscriber Identity) etc. is used in the scheduled radio resource and transmission format. An L2 / L3 message including information for identifying the mobile station device 1-1 is transmitted (message 3: (3)).
- the mobile station apparatus 1-1 When the transmission timing is adjusted, the mobile station apparatus 1-1 starts a transmission timing timer in which the adjusted transmission timing is valid. When this transmission timing timer expires, the adjusted transmission timing becomes invalid. While the transmission timing is valid, the mobile station device 1-1 can transmit data to the base station device 3-1, and when the transmission timing is invalid, it can only transmit the random access preamble.
- a period in which the transmission timing is valid is referred to as an uplink synchronization state, and a period in which the transmission timing is not valid is also referred to as an uplink asynchronous state.
- the base station device 3-1 When the base station device 3-1 receives the L2 / L3 message from the mobile station device 1-1, the base station device 3-1 moves using the C-RNTI (or Temporary C-RNTI) or IMSI included in the received L2 / L3 message.
- a collision confirmation (contention resolution) message for determining whether or not a collision has occurred between the station apparatuses 1-1 to 1-3 is transmitted to the mobile station apparatus 1-1 (message 4: (4)).
- the mobile station apparatus 1-1 does not detect the random access response message including the preamble number corresponding to the random access preamble transmitted within the predetermined period, fails to transmit the message 3, or is fixed period. If the identification information of the mobile station apparatus 1-1 is not detected in the collision confirmation message, transmission is repeated from transmission of the random access preamble (message 1: (1)).
- the mobile station apparatus 1-1 determines that the random access has failed and determines whether the random access preamble has been transmitted to the base station apparatus 3-1. Disconnect communication. After the random access procedure is successful, control data for connection is further exchanged between the base station apparatus 3-1 and the mobile station apparatus 1-1. At this time, the base station apparatus 3-1 notifies the mobile station apparatus 1-1 of uplink reference signals to be individually allocated and allocation information of the uplink control channel PUCCH.
- the update of the uplink transmission timing after completion of the random access procedure is performed by using the uplink reference signal (the measurement reference signal or the measurement reference signal or the base station device 3-1 transmitted from the mobile station device 1-1).
- (Demodulation reference signal) is measured, transmission timing is calculated, and a transmission timing message including the calculated transmission timing information is notified to the mobile station apparatus 1-1.
- the mobile station apparatus 1-1 updates the transmission timing indicated by the transmission timing message notified from the base station apparatus 3-1, it restarts the transmission timing timer.
- the base station apparatus 3-1 also holds the same transmission timing timer as that of the mobile station apparatus 1-1.
- the transmission timing timer is started or restarted. In this way, the uplink synchronization state is managed by the base station apparatus 3-1 and the mobile station apparatus 1-1. Note that the transmission timing is invalid when the transmission timing timer expires or when the transmission timing timer is not operating.
- 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 1).
- 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. Bundling a plurality of cells and performing communication between the base station apparatus and the mobile station apparatus via the plurality of cells is called carrier aggregation.
- One base station apparatus allocates a plurality of cells that match the communication capability and communication conditions of the mobile station apparatus, and communicates with the mobile station apparatus via the allocated plurality of cells.
- the plurality of cells allocated to the mobile station apparatus are one cell as a first cell (Primary cell (Primary Cell: PCell)) and the other cells as second cells (Secondary cell (Secondary Cell: SCell)). And classified.
- a special function such as allocation of the physical uplink control channel PUCCH is set in the first cell.
- the mobile station apparatus does not perform downlink reception processing on the second cell immediately after allocation (or the radio resource indicated by the physical downlink control channel PDCCH). Does not follow the allocation information). Then, after the mobile station apparatus is instructed to activate the second cell from the base station apparatus, the mobile station apparatus starts downlink reception processing for the second cell instructed to activate (or physically According to the radio resource allocation information indicated by the downlink control channel PDCCH).
- the mobile station apparatus performs downlink reception processing for the second cell instructed to deactivate. It stops (or does not follow the radio resource allocation information indicated by the physical downlink control channel PDCCH).
- the second cell that is instructed to activate by the base station device and is performing downlink reception processing is called an activation cell, and the second cell and deactivation immediately after allocation from the base station device to the mobile station device.
- the second cell that has been instructed and has stopped the downlink reception process is called a deactivated cell.
- the first cell is always an activated cell.
- the mobile station apparatus 1-1 simultaneously performs dual connect with two base station apparatuses (base station apparatus 3-1 and base station apparatus 3-2).
- Dual connect is not a high-speed backbone line (also referred to as backhaul) that can be regarded as non-delayed, such as an optical fiber, between the macro cell base station device 3-1 and the small cell base station device 3-2.
- backhaul also referred to as backhaul
- the mobile station apparatus 1-1 is connected using a low-speed backbone line
- the mobile station apparatus 1-1 is connected to the macro cell base station apparatus 3-1 and the small cell base station apparatus 3-2, and the mobile station apparatus 1-1. It is assumed that both base station apparatuses perform data transmission / reception via a plurality of cells (Non-patent Document 2).
- dual connect communication is performed between the mobile station apparatus 1-1 and the base station apparatus with the macro cell as the first cell (PCell) and the small cell as the second cell (SCell).
- control data is transmitted and received between the macro cell base station apparatus 3-1 and the mobile station apparatus 1-1
- user data is transmitted between the small cell base station apparatus 3-2 and the mobile station apparatus 1-1. May be sent and received.
- the base station apparatus that transmits and receives data may be changed based on a data type (for example, QoS or logical channel) that is finer than control data and user data.
- a data type for example, QoS or logical channel
- the base station apparatuses are connected by a low-speed line with a delay
- the macro cell base station apparatus 3-1 and the small cell base station apparatus are considered in consideration of the line delay between the base station apparatuses.
- Each of 3-2 independently performs downlink and uplink data scheduling and downlink data transmission to the mobile station apparatus 1-1.
- both or one of the reception timing for each downlink component carrier in mobile station device 1-1 and the transmission timing to the base station device for each uplink component carrier differs for each cell.
- communication is performed by grouping cells having the same uplink transmission timing. Grouping cells having the same transmission timing is called a transmission timing group (Timing Advance Group).
- the MAC layer of the mobile station device 1-1 also has a function of controlling the PHY layer in order to manage transmission timing groups.
- FIG. 1 is a diagram illustrating a configuration of a mobile station apparatus according to an embodiment of the present invention.
- the mobile station apparatuses 1-1 to 1-3 include a data generation unit 101, a transmission data storage unit 103, a transmission HARQ processing unit 105, a transmission processing unit 107, a radio unit 109, a reception processing unit 111, a reception HARQ processing unit 113, and a MAC.
- the information extraction unit 115, the PHY control unit 117, the MAC control unit 119, the data processing unit 121, and the RRC control unit 123 are configured.
- the data generation unit 101 has functions of a PDCP layer and an RLC layer.
- the data generation unit 101 performs processing such as header compression of the IP packet of user data, data encryption, data division and combination, and adjusts the data size.
- the data generation unit 101 outputs the processed data to the transmission data storage unit 103.
- the transmission data storage unit 103 accumulates the data input from the data generation unit 101, and outputs the instructed data to the transmission HARQ processing unit 105 by the instructed data amount based on the instruction from the MAC control unit 119. . In addition, the transmission data storage unit 103 outputs information on the amount of accumulated data to the MAC control unit 119.
- the transmission HARQ processing unit 105 encodes input data and performs puncture processing on the encoded data. Then, transmission HARQ processing section 105 outputs the punctured data to transmission processing section 107, and stores the encoded data. When instructed by the MAC control unit 119 to retransmit data, the transmission HARQ processing unit 105 performs puncture processing different from the puncture performed last time from the stored (buffered) encoded data, and performs puncturing. The processed data is output to the transmission processing unit 107. When the transmission HARQ processing unit 105 is instructed to delete data from the MAC control unit 119, the transmission HARQ processing unit 105 deletes data corresponding to the designated cell.
- the transmission processing unit 107 modulates and encodes the data input from the transmission HARQ processing unit 105.
- the transmission processing unit 107 performs DFT (Discrete Fourier Transform (Discrete Fourier Transform))-IFFT (Inverse Fast Fourier Transform (Inverse Fast Fourier Transform)) processing of the modulated and encoded data, and after processing, CP (Cyclic prefix) Is inserted into the physical uplink shared channel (PUSCH) of each uplink component carrier (cell) and output to the radio section 109.
- DFT Discrete Fourier Transform
- IFFT Inverse Fast Fourier Transform
- CP Cyclic prefix
- the transmission processing unit 107 when there is a response instruction for received data from the PHY control unit 117, the transmission processing unit 107 generates an ACK or NACK signal, places the generated signal in the physical uplink control channel (PUCCH), and transmits the radio unit 109. Output to.
- the transmission processing unit 107 When there is a random access preamble transmission instruction from the PHY control unit 117, the transmission processing unit 107 generates a random access preamble, places the generated signal in the physical random access channel PRACH, and outputs the generated signal to the radio unit 109.
- the radio unit 109 up-converts the data input from the transmission processing unit 107 to the radio frequency of the transmission position information (transmission cell information) instructed from the PHY control unit 117, adjusts the transmission power, and transmits the data from the transmission antenna. Send.
- Radio section 109 down-converts the radio signal received from the reception antenna and outputs the result to reception processing section 111.
- Radio section 109 sets the transmission timing information received from PHY control section 117 as the uplink transmission timing.
- the reception processing unit 111 performs FFT (Fast Fourier Transform) processing, decoding, demodulation processing, and the like on the signal input from the wireless unit 109.
- FFT Fast Fourier Transform
- the reception processing unit 111 demodulates the physical downlink control channel PDCCH or the physical extended downlink control channel EPDCCH and detects the downlink allocation information of the mobile station apparatus, the reception processing unit 111 determines the physical downlink based on the downlink allocation information.
- the shared channel PDSCH is demodulated and the fact that downlink allocation information has been acquired is output to the MAC control unit 119.
- the reception processing unit 111 outputs the demodulated physical downlink shared channel PDSCH data to the reception HARQ processing unit 113.
- the reception processing unit 111 demodulates the physical downlink control channel PDCCH or the physical extended downlink control channel EPDCCH, uplink transmission permission information (Uplink grant: uplink grant), and uplink transmission data response information (ACK / NACK). ) Is detected, the acquired response information is output to the MAC control unit 119.
- the uplink transmission permission information includes data modulation / coding scheme, data size information, HARQ information, transmission position information, and the like.
- the reception HARQ processing unit 113 performs a decoding process on the input data from the reception processing unit 111, and outputs the data to the MAC information extraction unit 115 when the decoding process is successful.
- the reception HARQ processing unit 113 stores the data that has failed in the decoding process when the decoding process of the input data has failed.
- the reception HARQ processing unit 113 When receiving the retransmission data, the reception HARQ processing unit 113 combines the stored data and the retransmission data and performs a decoding process. Further, the reception HARQ processing unit 113 notifies the MAC control unit 119 of success or failure of the input data decoding process.
- the MAC information extraction unit 115 extracts the control data of the MAC layer (Medium Access Access Control layer) from the data input from the reception HARQ processing unit 113, and outputs the extracted MAC control information to the MAC control unit 119.
- the MAC information extraction unit 115 outputs the remaining data to the data processing unit 121.
- the data processing unit 121 has functions of a PDCP layer and an RLC layer, and performs processing such as decompression (decompression) function of compressed IP header, decryption function of encrypted data, data division and combination, and data Return to its original shape.
- the data processing unit 121 divides the RRC message and user data, outputs the RRC message to the RRC control unit 123, and outputs the user data to the upper layer.
- the PHY control unit 117 controls the transmission processing unit 107, the radio unit 109, and the reception processing unit 111 according to an instruction from the MAC control unit 119.
- the PHY control unit 117 notifies the transmission processing unit 107 of the modulation / coding scheme and transmission position from the modulation / coding scheme, transmission power information and transmission position information (transmission cell information) notified from the MAC control unit 119,
- the radio unit 109 is notified of the frequency information and transmission power information of the transmission cell.
- the PHY control unit 117 performs power supply (power supply) ON / OFF control of the transmission processing unit 107, the radio unit 109, and the reception processing unit 111 according to an instruction from the MAC control unit 119.
- ON / OFF control refers to power saving control including reducing power supply to standby power.
- the MAC control unit 119 has a MAC layer function, and controls the MAC layer based on information acquired from the RRC control unit 123 or a lower layer.
- the MAC control unit 119 determines the data transmission destination based on the data transmission control setting specified from the RRC control unit 123, the data amount information acquired from the transmission data storage unit 103, and the uplink transmission permission information acquired from the reception processing unit 111.
- the data transmission priority order is determined, and information about data to be transmitted is notified to the transmission data storage unit 103.
- the MAC control unit 119 notifies the transmission HARQ processing unit 105 of HARQ information, and outputs the modulation / coding scheme and transmission position information (transmission cell information) to the PHY control unit 117.
- the MAC control unit 119 obtains response information for the uplink transmission data from the reception processing unit 111, and when the response information indicates NACK (non-response), retransmits to the transmission HARQ processing unit 105 and the PHY control unit 117. Instruct.
- the MAC control unit 119 instructs the PHY control unit 117 to transmit an ACK or NACK signal.
- the MAC control unit 119 When the MAC control unit 119 acquires activation / deactivation instruction information and discontinuous reception (DRX) control information of a cell (or component carrier) from the MAC control information input from the MAC information extraction unit 115, the MAC control unit 119 is activated. To perform activation / deactivation control and intermittent reception control, the PHY control unit 117 is controlled to perform operation start / operation stop control of the radio unit 109, the transmission processing unit 107, and the reception processing unit 111.
- DRX discontinuous reception
- the MAC control unit 119 acquires transmission timing group information and transmission timing timer information from the RRC control unit 123.
- the MAC control unit 119 manages validity / invalidity of the uplink transmission timing of each transmission timing group using a transmission timing timer.
- the MAC control unit 119 outputs the transmission timing information included in the transmission timing message among the MAC control information input from the MAC information extraction unit 115 to the PHY control unit 117.
- the MAC control unit 119 starts or restarts a transmission timing timer corresponding to a case where transmission timing is set for each cell or transmission timing group.
- the MAC control unit 119 instructs the transmission HARQ processing unit 105 to erase the stored data for the cells of the transmission timing group whose transmission timing timer has expired.
- the MAC control unit 119 notifies the RRC control unit 123 to release the radio resources of the physical uplink control channel PUCCH and the uplink measurement reference signal allocated to the cell of the transmission timing group whose transmission timing timer has expired. Also, the MAC control unit 119 discards the uplink transmission permission information for the cells of the transmission timing group whose transmission timing timer has expired.
- the MAC control unit 119 saves all the cells in the transmission HARQ processing unit 105 when the transmission timing timer expires when it is not dual connect and when the transmission timing timer of the transmission timing group including the first cell expires. To erase the data.
- the MAC control unit 119 notifies the RRC control unit 123 to release the radio resources of the physical uplink control channel PUCCH of the first cell and the uplink measurement reference signal of all cells. Further, the MAC control unit 119 discards uplink transmission permission information for all cells.
- the MAC control unit 119 is a case where the transmission timing timer expires when it is not dual connect, and when the transmission timing timer of the transmission timing group not including the first cell expires, the transmission timing group whose transmission timing timer has expired The RRC control unit 123 is notified to release the radio resource of the uplink measurement reference signal assigned to the cell. Also, the MAC control unit 119 discards the uplink transmission permission information for the cells of the transmission timing group whose transmission timing timer has expired.
- the MAC control unit 119 creates a buffer status report (BSR) that is data amount information stored in the transmission data storage unit 103 and outputs the buffer status report (BSR) to the transmission data storage unit 103. Further, the MAC control unit 119 creates a power headroom report (PHR) that is transmission power information for each cell, and outputs it to the transmission data storage unit 103.
- BSR buffer status report
- PHR power headroom report
- the RRC control unit 123 performs connection / disconnection processing with the base station device 3-1, carrier aggregation setting (cell addition / deletion), dual connect setting, control data and user data data transmission control setting, etc. -1 and various settings for communicating with the base station apparatus 3-2.
- the RRC control unit 123 exchanges information with an upper layer associated with various settings, and controls a lower layer associated with the various settings.
- the RRC control unit 123 creates an RRC message and outputs the created RRC message to the data generation unit 101.
- the RRC control unit 123 analyzes the RRC message input from the data processing unit 121.
- the RRC control unit 123 creates a message indicating the transmission capability of the mobile station apparatus and outputs the message to the data generation unit 101. Further, the RRC control unit 123 outputs information necessary for the MAC layer to the MAC control unit 119 and outputs information necessary for the physical layer to the PHY control unit 117.
- the RRC control unit 123 When the RRC control unit 123 acquires the transmission timing group information and the transmission timing timer information of each cell in the carrier aggregation setting, the RRC control unit 123 outputs the transmission timing group information and the transmission timing timer information of each cell to the MAC control unit 119. In addition, when the RRC control unit 123 recognizes that the base station device 3-1 and the base station device 3-2 communicate with each other through dual connection, the RRC control unit 123 notifies the MAC control unit 119 that the dual connection state is established. When the RRC control unit 123 is notified of the release of the physical uplink control channel PUCCH or the uplink measurement reference signal from the MAC control unit 119, the RRC control unit 123 displays the allocated physical uplink control channel PUCCH and the uplink measurement reference signal. The PHY control unit 117 is instructed to release the physical uplink control channel PUCCH and the uplink measurement reference signal.
- the transmission processing unit 107, the radio unit 109, the reception processing unit 111, and the PHY control unit 117 perform operations of the physical layer, and transmit data storage unit 103, transmission HARQ processing unit 105, reception HARQ processing unit 113, MAC information extraction.
- 115 and MAC control unit 119 operate in the MAC layer
- data generation unit 101 and data processing unit 121 operate in the RLC layer and PDCP layer
- RRC control unit 123 operates in the RRC layer.
- FIG. 2 is a diagram showing a configuration of the base station apparatus according to the embodiment of the present invention.
- the base station device 3-1 or the base station device 3-2 includes a data generation unit 201, a transmission data storage unit 203, a transmission HARQ processing unit 205, a transmission processing unit 207, a radio unit 209, a reception processing unit 211, and a reception HARQ.
- the data generation unit 201 has functions of a PDCP layer and an RLC layer, and performs processing such as header compression of the IP packet of user data, data encryption, data division and combination, and adjusts the data size.
- the data generation unit 201 outputs the processed data and the logical channel information of the data to the transmission data storage unit 203.
- the transmission data storage unit 203 accumulates the data input from the data generation unit 201 for each user, and transmits the user data instructed based on the instruction from the MAC control unit 219 for the specified data amount. The data is output to the unit 205. Also, the transmission data storage unit 203 outputs information on the amount of accumulated data to the MAC control unit 219.
- the transmission HARQ processing unit 205 encodes input data and performs puncture processing on the encoded data. Then, the transmission HARQ processing unit 205 outputs the punctured data to the transmission processing unit 207, and stores the encoded data. The transmission HARQ processing unit 205, when instructed to retransmit data from the MAC control unit 219, performs a puncture process different from the previously performed puncture from the stored encoded data, and transmits the punctured data to the transmission processing unit 207. Output to.
- the transmission processing unit 207 modulates and encodes the data input from the transmission HARQ processing unit 205.
- the transmission processing unit 207 maps the modulated and encoded data to signals such as physical downlink control channel PDCCH, downlink synchronization signal, physical broadcast channel PBCH, physical downlink shared channel PDSCH and the like of each cell,
- the mapped data is subjected to OFDM signal processing such as serial / parallel conversion, IFFT (Inverse Fourier Transform (Inverse Fast Fourier Transform)) conversion, and CP insertion to generate an OFDM signal.
- OFDM signal processing such as serial / parallel conversion, IFFT (Inverse Fourier Transform (Inverse Fast Fourier Transform)) conversion, and CP insertion to generate an OFDM signal.
- the transmission processing unit 207 outputs the generated OFDM signal to the wireless unit 209.
- the transmission processing unit 207 when there is a response instruction for received data from the MAC control unit 219, the transmission processing unit 207 generates an ACK or NACK signal, places the generated signal in the physical downlink control channel PDCCH, and outputs it to the radio unit 209. To do.
- the radio unit 209 up-converts data input from the transmission processing unit 207 to a radio frequency, adjusts transmission power, and transmits data from the transmission antenna.
- the radio unit 209 down-converts the radio signal received from the reception antenna and outputs it to the reception processing unit 211.
- the reception processing unit 211 performs FFT (Fast Fourier Transform (fast Fourier transform)) processing, decoding, demodulation processing, and the like on the signal input from the wireless unit 209.
- FFT Fast Fourier Transform
- the reception processing unit 211 outputs the data of the physical uplink shared channel PUSCH among the demodulated data to the reception HARQ processing unit 213. Further, the reception processing unit 211 receives response information (ACK / NACK), downlink radio quality information (CQI), and uplink radio quality information (CQI) of control data acquired from the physical uplink control channel PUCCH among the demodulated data. Transmission request information (scheduling request) is output to the MAC control unit 219.
- the reception processing unit 211 calculates a transmission timing from the detected random access preamble, and outputs the detected random access preamble number and the calculated transmission timing to the MAC control unit 219.
- the reception processing unit 211 calculates transmission timing from the uplink reference signal, and outputs the calculated transmission timing to the MAC control unit 219.
- the reception HARQ processing unit 213 performs a decoding process on the input data from the reception processing unit 211 and outputs the data to the MAC information extraction unit 215 when the decoding process is successful.
- the reception HARQ processing unit 213 stores the data that has failed in the decoding process when the decoding process of the input data has failed.
- the reception HARQ processing unit 213 combines the stored data and the retransmission data and performs a decoding process. Also, the reception HARQ processing unit 213 notifies the MAC control unit 219 of the success or failure of the input data decoding process.
- the reception HARQ processing unit 213 erases data corresponding to the designated cell when instructed to erase data from the MAC control unit 219.
- the MAC information extraction unit 215 extracts the MAC layer control data from the data input from the reception HARQ processing unit 213, and outputs the extracted control information to the MAC control unit 219.
- the MAC information extraction unit 215 outputs the remaining data to the data processing unit 221.
- the data processing unit 221 has functions of a PDCP layer and an RLC layer, performs a decompression (decompression) function of a compressed IP header, a decryption function of encrypted data, a process of dividing and combining data, and the like. Return to its original shape.
- the data processing unit 221 divides the RRC message and user data, outputs the RRC message to the RRC control unit 223, and outputs the user data to the upper layer.
- the MAC control unit 219 has a MAC layer function, and controls the MAC layer based on information acquired from the RRC control unit 223 and lower layers.
- the MAC control unit 219 performs downlink and uplink scheduling processing.
- the MAC control unit 219 includes downlink transmission data response information (ACK / NACK), downlink radio quality information (CQI) and uplink transmission request information (scheduling request) input from the reception processing unit 211, and a MAC information extraction unit. Downlink and uplink scheduling processing is performed based on the control information input from 215, the data amount information for each user acquired from the transmission data storage unit 203, and the reception operation state of the mobile station apparatus 1-1.
- the MAC control unit 219 outputs the schedule result to the transmission processing unit 207.
- the MAC control unit 219 acquires response information for the uplink transmission data from the reception processing unit 211, and resends to the transmission HARQ processing unit 205 and the transmission processing unit 207 when the response information indicates NACK (non-response). Instruct.
- the MAC control unit 219 instructs the transmission processing unit 207 to transmit an ACK or NACK signal.
- the MAC control unit 219 performs activation / deactivation processing of the cell (or component carrier) assigned to the mobile station apparatus 1-1, management of uplink transmission timing, and the like.
- the reception operation state of the mobile station apparatus 1-1 is determined from the intermittent reception parameters acquired from the RRC control unit 223.
- the MAC control unit 219 When acquiring the random access preamble number and the transmission timing from the reception processing unit 211, the MAC control unit 219 creates a random access response message and outputs the random access response message to the transmission data storage unit 203. Further, when acquiring the transmission timing from the reception processing unit 211, the MAC control unit 219 creates a transmission timing message including the transmission timing, and outputs the transmission timing message to the transmission data storage unit 203.
- the MAC control unit 219 manages the uplink transmission timing of the transmission timing group of the mobile station apparatus 1-1 using the transmission timing timer. When transmitting a transmission timing message for each transmission timing group to the mobile station apparatus 1-1, the MAC control unit 219 starts or restarts the corresponding transmission timing timer.
- the MAC control unit 219 instructs the reception HARQ processing unit 213 to erase the stored data for the cells of the transmission timing group whose transmission timing timer has expired.
- the MAC control unit 219 releases the radio resources of the physical uplink control channel PUCCH and the uplink measurement reference signal allocated to the mobile station apparatus 1-1 for the cell of the transmission timing group whose transmission timing timer has expired. 223 is notified. Further, the MAC control unit 219 stops uplink data scheduling for the cells of the transmission timing group whose transmission timing timer has expired.
- the MAC control unit 219 sends the reception HARQ processing unit 213 to the mobile station device 1-1. Instructs erasure of stored data for all assigned cells.
- the MAC control unit 219 notifies the RRC control unit 223 to release the radio resources of the physical uplink control channel PUCCH of the first cell allocated to the mobile station device 1-1 and the uplink measurement reference signal of all cells. Further, the MAC control unit 219 stops scheduling of uplink data for all cells with respect to the mobile station apparatus 1-1.
- the MAC control unit 219 sends the mobile station device 1-1 to the reception HARQ processing unit 213.
- An instruction to erase the stored data is sent to a cell of a transmission timing group whose transmission timing timer assigned to has expired.
- the MAC control unit 219 notifies the RRC control unit 223 to release the radio resource of the uplink measurement reference signal assigned to the mobile station apparatus 1-1 for the cell of the transmission timing group whose transmission timing timer has expired.
- the MAC control unit 219 stops scheduling of uplink data for the cell of the transmission timing group whose transmission timing timer has expired for the mobile station apparatus 1-1.
- the RRC control unit 223 performs connection / disconnection processing with the mobile station apparatus 1-1, carrier aggregation setting (cell addition / deletion), dual connect setting, control data and user data of the mobile station apparatus 1-1 to which cell Perform various settings for communication with the mobile station apparatus 1-1 such as data transmission control settings for transmission / reception, exchange information with an upper layer associated with the various settings, and lower layer associated with the various settings. Take control.
- the RRC control unit 223 creates various RRC messages and outputs the created RRC messages to the data generation unit 201.
- the RRC control unit 223 analyzes the RRC message input from the data processing unit 221.
- the RRC control unit 223 acquires a message indicating the transmission / reception capability of the mobile station device from the mobile station device 1-1
- the RRC control unit 223 performs carrier aggregation suitable for the mobile station device 1-1 based on the transmission / reception capability information of the mobile station device. Configure settings or dual connect settings.
- the RRC control unit 223 outputs information necessary for the MAC layer to the MAC control unit 219, and outputs information necessary for the physical layer to the PHY control unit 217. Further, the RRC control unit 223 notifies the necessary information to the inter-base station communication unit 225 and the MME communication unit 227 when performing handover or dual connection. When receiving the dual connect request message, the RRC control unit 223 notifies the inter-base station communication unit 225 of transmission timing group information and transmission timing timer information applied to the mobile station device 1-1.
- the RRC control unit 223 When the RRC control unit 223 is notified of the release of the physical uplink control channel PUCCH or the uplink measurement reference signal from the MAC control unit 219, the RRC control unit 223 displays the allocated physical uplink control channel PUCCH and the uplink measurement reference signal. The PHY control unit 217 is instructed to release the physical uplink control channel PUCCH and the uplink measurement reference signal.
- the inter-base station apparatus communication unit 225 communicates with another base station apparatus, and transmits a control message between base station apparatuses input from the RRC control unit 223 to the other base station apparatus. Further, the inter-base station apparatus communication unit 225 receives a control message between base station apparatuses from other base station apparatuses, and outputs the received control message to the RRC control unit 223. Control messages between base station apparatuses include a control message related to handover and a control message related to dual connection.
- the MME communication unit 227 communicates with an MME (Mobility Management Entity) and transmits a control message between the base station apparatus and the MME input from the RRC control unit 223 to the MME. Further, the MME communication unit 227 receives a control message between the base station apparatus and the MME from the MME, and outputs the received control message to the RRC control unit 223. Control messages between the base station apparatus and the MME include a path switch request message and a path switch request response message.
- MME Mobility Management Entity
- the inter-GW communication unit 229 communicates with the GW, receives the user data of the mobile station device transmitted from the GW, and outputs the received data to the data generation unit 201. Further, the inter-GW communication unit 229 transmits the user data of the mobile station apparatus input from the data processing unit 221 to the GW.
- the transmission processing unit 207, the radio unit 209, and the reception processing unit 211 perform operations of the PHY layer, and transmit data storage unit 203, transmission HARQ processing unit 205, reception HARQ processing unit 213, MAC information extraction unit 215, MAC control.
- the unit 219 performs operations of the MAC layer
- the data generation unit 201 and the data processing unit 221 perform operations of the RLC layer and the PDCP layer
- the RRC control unit 223 performs operations of the RRC layer.
- the mobile station apparatus 1-1 is connected to the base station apparatus 3-1 and the base station apparatus 3-2 by dual connection. Control information is transmitted and received between the base station apparatus 3-1 of the macro cell and the mobile station apparatus 1-1. The user information is transmitted and received between the small cell base station apparatus 3-2 and the mobile station apparatus 1-1.
- the mobile station apparatus 1-1 is connected to the base station apparatus 3-1 and the base station apparatus 3-2 by dual connection.
- At least control information (Control-plane information) of the mobile station apparatus 1-1 is transmitted and received between the base station apparatus 3-1 of the macro cell and the MME (Mobility Management Entity).
- At least user information (User-plane information) of the mobile station device 1-1 is transmitted and received between the small cell base station device 3-2 and the GW (Gateway).
- Control information for controlling the mobile station apparatus 1-1 is transmitted and received between the macro cell base station apparatus 3-1 and the small cell base station apparatus 3-2.
- At least control information (Control-plane information) of the mobile station apparatus 1-1 is transmitted and received between the base station apparatus 3-1 and MME (Mobility Management Entity) of the macro cell. Done. At least user information (User-plane information) of the mobile station apparatus 1-1 is transmitted and received between the base station apparatus 3-1 and GW (Gateway) in the macro cell.
- MME Mobility Management Entity
- User-plane information is transmitted and received between the base station apparatus 3-1 and GW (Gateway) in the macro cell.
- the macro cell base station apparatus 3-1 transfers the user information received from the GW to the small cell base station apparatus 3-2.
- the small cell base station apparatus 3-2 transfers the user information received from the mobile station apparatus 1-1 to the base station apparatus 3-1.
- transmission / reception of control information for controlling the mobile station apparatus 1-1 is performed between the base station apparatus 3-1 of the macro cell and the base station apparatus 3-2 of the small cell.
- base station apparatus 3-1 provides cell 1 and cell 2 as shown in FIG. 5, and base station apparatus 3-2 provides cell 3 and cell 4.
- Cell 1 and cell 2 are transmission timing groups (transmission timing group 1) having the same transmission timing
- cell 3 and cell 4 are transmission timing groups (transmission timing group 2) having the same transmission timing. Note that cell 1 is set as the first cell, and cell 2, cell 3 and cell 4 are set as the second cell.
- the mobile station device 1-1 performs a cell search and finds one cell of the base station device 3-1. Here, it is assumed that the mobile station apparatus 1-1 finds the cell 1.
- the mobile station device 1-1 receives the physical broadcast channel PBCH of the cell 1 and acquires system information (cell physical channel configuration, transmission power information, information on random access procedure, transmission timing timer information, etc.). Then, the mobile station apparatus 1-1 transmits a random access preamble to the physical random access channel RACH of the cell 1 for initial access using information on the random access procedure included in the system information.
- system information cell physical channel configuration, transmission power information, information on random access procedure, transmission timing timer information, etc.
- the mobile station device 1-1 acquires a random access response message including the transmission timing information for the cell 1 from the base station device 3-1, sets the transmission timing information as the uplink transmission timing of the cell 1, A transmission timing timer (here, referred to as transmission timing timer 1) designated by the system information of cell 1 is started.
- the mobile station device 1-1 transmits the message 3 to the base station device 3-1 via the cell 1.
- the mobile station apparatus 1-1 transmits the message 3 including the contents indicating the initial access in the message 3.
- the mobile station device 1-1 ends the random access procedure.
- a dual connect request message is transmitted to the base station apparatus 3-2.
- the base station device 3-2 Upon receiving the dual connect request message, the base station device 3-2 transmits a dual connect request response message to the base station device 3-1.
- the dual connect request response message includes system information of the cell (cell 3 and cell 4) of the base station device 3-2 and information set by the base station device 3-2 to the mobile station device 1-1.
- Information set by the base station device 3-2 in the mobile station device 1-1 includes physical resource information (physical uplink control channel PUCCH) used by the mobile station device 1-1 in the cell to be added (cell 3 and cell 4). , Uplink reference signal), transmission timing group information, transmission timing timer information for the transmission timing group, and the like.
- physical resource information physical uplink control channel PUCCH
- PUCCH physical uplink control channel
- the base station apparatus 3-1 transmits a cell setting message for instructing the carrier aggregation to the mobile station apparatus 1-1.
- system information of cells to be added (cell 2, cell 3, cell 4), physical resource information used by the mobile station device 1-1 in the added cells (physical uplink control channel PUCCH, uplink reference) Signal), transmission timing group information, transmission timing timer information of the transmission timing group, data control information indicating in which cell control data or user data is transmitted, information indicating whether or not dual connection is performed, and the like.
- PUCCH physical uplink control channel
- uplink reference uplink reference
- the information indicating whether or not dual connection may be 1-bit information indicating whether or not dual connection is established. Also, the mobile station apparatus 1-1 may determine that the physical station information is in the dual connect state when the physical uplink control channel PUCCH is included in the physical resource information. Further, the mobile station apparatus 1-1 may determine that the mobile station apparatus 1-1 is in the dual connect state when the control data and the user data are instructed to transmit in different cells. Alternatively, a cell setting message indicating dual connection may be prepared separately, and the message may be appropriately used depending on whether or not the base station apparatus 3-1 is in dual connection.
- the base station device 3-1 transmits an activation instruction message indicating activation of the cell 2, the cell 3, and the cell 4 to the mobile station device 1-1.
- the mobile station apparatus 1-1 Upon receiving the activation instruction message, the mobile station apparatus 1-1 starts downlink reception processing in the cell 2, the cell 3, and the cell 4.
- the base station device 3-2 transmits a random access instruction message to the cell 3.
- the mobile station apparatus 1-1 executes the random access procedure in the cell 3.
- the mobile station apparatus 1-1 transmits the random access preamble designated by the random access instruction message on the physical random access channel PRACH of the cell 3.
- the mobile station apparatus 1-1 monitors the physical downlink control channel PDCCH and acquires random access response identification information, the mobile station apparatus 1-1 receives a random access response message.
- the mobile station apparatus 1-1 When the mobile station apparatus 1-1 acquires the random access response message, it applies the transmission timing information included in the random access response message as the transmission timing of the transmission timing group (transmission timing group 2) including the cell 3. That is, the mobile station apparatus 1-1 applies the transmission timing information as the uplink transmission timing of the cell 3 and the cell 4. Then, the mobile station apparatus 1-1 starts a transmission timing timer (in this case, the transmission timing timer 2) of the transmission timing group (transmission timing group 2) including the cell 3 that has transmitted the random access preamble. The mobile station apparatus 1-1 ends the random access procedure.
- a transmission timing timer in this case, the transmission timing timer 2 of the transmission timing group (transmission timing group 2) including the cell 3 that has transmitted the random access preamble.
- the mobile station apparatus 1-1 sets the transmission timing of cell 1 as the transmission timing of cell 2 when the transmission timing group is set by setting transmission timing group 1 (cell 1 and cell 2) in the cell setting message. To do.
- the base station apparatus 3-1 or the base station apparatus 3-2 measures the uplink reference signal from the mobile station apparatus 1-1 and calculates transmission timing information.
- the base station apparatus 3-1 or the base station apparatus 3-2 transmits the transmission timing information of each transmission timing group to the mobile station apparatus 1-1 while each transmission timing timer is operating.
- the mobile station apparatus 1-1 Upon receiving the transmission timing information of the transmission timing group, the mobile station apparatus 1-1 applies the transmission timing information as the uplink transmission timing of the designated transmission timing group, and restarts the transmission timing timer corresponding to the transmission timing group To do.
- the base station device 3-1 or the base station device 3-2 holds the same transmission timing timer as that of the mobile station device 1-1, and transmits the transmission timing information or transmits the transmission timing information.
- ACK acknowledgment
- the mobile station apparatus 1-1 When it is in the dual connect state based on the information indicating whether or not it is dual connect and the transmission timing timer of each transmission timing group has expired, the mobile station apparatus 1-1 performs for the cell of the transmission timing group whose transmission timing timer has expired. The uplink transmission other than the random access preamble transmission is prohibited. Then, the mobile station apparatus 1-1 deletes the data stored in the transmission HARQ storage unit 109 (hereinafter referred to as a transmission HARQ buffer) corresponding to the transmission timing group for which the transmission timing timer has expired (or Flush the transmission HARQ buffer corresponding to the transmission timing group for which the transmission timing timer has expired).
- a transmission HARQ buffer the transmission HARQ storage unit 109
- the mobile station apparatus 1-1 releases the radio resource of the uplink control channel PUCCH and the radio resource of the measurement reference signal assigned to the cell of the transmission timing group whose transmission timing timer has expired. Further, when uplink transmission permission information is acquired for a cell of a transmission timing group whose transmission timing timer has expired, the mobile station apparatus 1-1 discards the uplink transmission permission information of the uplink shared channel PUSCH. . The mobile station apparatus 1-1 may also discard the downlink shared channel PDSCH allocation information.
- the mobile station apparatus 1-1 when the transmission timing timer 2 expires, the mobile station apparatus 1-1 does not perform uplink transmission other than random access preamble transmission to the cells 3 and 4 belonging to the transmission timing group 2. Then, the mobile station apparatus 1-1 erases the data in the transmission HARQ buffer corresponding to the cells 3 and 4 of the transmission timing group 2.
- the mobile station apparatus 1-1 releases the radio resource of the uplink control channel PUCCH and the radio resource of the measurement reference signal allocated to the cells (cell 3 and cell 4) of the transmission timing group 2. Further, when the uplink transmission permission information for the cell 3 and the cell 4 in the transmission timing group 2 is acquired, the mobile station apparatus 1-1 discards the transmission permission information of the uplink shared channel PUSCH.
- the mobile station apparatus 1-1 performs the same processing without performing uplink transmission other than random access preamble transmission to the cells 1 and 2 of the transmission timing group 1 . That is, in the case of dual connect, the mobile station apparatus 1-1 performs control related to the transmission timing group for each base station apparatus.
- the base station device 3-1 or the base station device 3-2 stops the uplink shared PUSCH channel allocation process for the cells of the transmission timing group whose transmission timing timer has expired, Data stored in the reception HARQ storage unit 221 (hereinafter referred to as reception HARQ buffer) is deleted. Then, the base station device 3-1 or the base station device 3-2 measures the radio resources of the uplink control channel PUCCH allocated to the mobile station device 1-1 for the cell of the transmission timing group whose transmission timing timer has expired. Release the radio resources of the reference signal for use.
- the base station apparatus 3-1 provides cell 1, cell 2, cell 3, and cell 4, transmission timing group 1 (cell 1, cell 2), transmission timing group 2 (cell 3, cell 4) when the mobile station apparatus 1-1 is set, when the transmission timing timer (transmission timing timer 1) of the transmission timing group (transmission timing group) including the first cell (cell 1) expires, the mobile station apparatus 1-1 stops the transmission timing timer (transmission timing timer 2) of the other transmission timing group (transmission timing group 2), and performs the first operation on all cells (cell 1, cell 2, cell 3, cell 4). The uplink transmission other than the random access preamble transmission in one cell (cell 1) is stopped.
- the mobile station apparatus 1-1 then erases all data stored in the transmission HARQ storage unit 109 (transmission HARQ buffer).
- the mobile station apparatus 1-1 transmits the radio resource of the assigned uplink control channel PUCCH and the measurement reference signal assigned to all the cells (cell 1, cell 2, cell 3, cell 4). Release radio resources. Further, when the downlink allocation information and the uplink transmission permission information are acquired, the mobile station apparatus 1-1 discards all the downlink shared channel PDSCH allocation information and the uplink shared channel PUSCH transmission permission information. .
- the mobile station apparatus 1-1 When the transmission timing timer (transmission timing timer 2) of the transmission timing group (transmission timing group 2) composed only of the second cell not including the first cell expires, the mobile station apparatus 1-1 receives the transmission timing timer. Uplink transmission other than random access preamble transmission is prohibited for the cells (cell 3 and cell 4) of the expired transmission timing group (transmission timing group 2).
- the mobile station apparatus 1-1 erases the data stored in the transmission HARQ buffer corresponding to the cells (cell 3 and cell 4) of the transmission timing group (transmission timing group 2) whose transmission timing timer has expired.
- the mobile station apparatus 1-1 releases the radio resources of the measurement reference signal assigned to the cells (cell 3 and cell 4) of the transmission timing group (transmission timing group 2) whose transmission timing timer has expired.
- the mobile station apparatus 1-1 transmits the transmission timing timer
- the transmission permission information of the uplink shared channel PUSCH of the cells (cell 3 and cell 4) of the transmission timing group (transmission timing group 2) for which has expired is discarded.
- the base station apparatus 3-1 transmits a transmission timing group composed of only the second cell.
- Cell 3, cell 4 transmission timing timer (transmission timing timer 2) is stopped, uplink shared PUSCH channel assignment is stopped for all cells of mobile station apparatus 1-1, and reception HARQ storage section 221 is stopped. All data stored in (hereinafter referred to as reception HARQ buffer) is deleted.
- the base station apparatus 3-1 performs the measurement allocated to the radio resources of the uplink control channel PUCCH allocated to the mobile station apparatus 1-1 and all the cells (cell 1, cell 2, cell 3, cell 4). Release the radio resources of the reference signal for use.
- the base station device 3-1 transmits the transmission timing when the transmission timing timer expires.
- the allocation of the uplink shared channel PUSCH to the cells (cell 3 and cell 4) included in the group (transmission timing group 2) is stopped.
- the base station device 3-1 erases the data for the cells (cell 3, cell 4) included in the transmission timing group (transmission timing group 2) whose transmission timing timer stored in the reception HARQ buffer has expired.
- the base station device 3-1 is assigned to cells (cell 3, cell 4) included in the transmission timing group (transmission timing group 2) for which the transmission timing timer assigned to the mobile station device 1-1 has expired. Release radio resources of the reference signal for measurement.
- the base station apparatus 3-1 provides cell 1, cell 2, and cell 3, and the base station apparatus 3-2 provides cell 4 and cell 5.
- Cell 1 and cell 2 are transmission timing groups (transmission timing group 1) having the same transmission timing
- cell 3 is a transmission timing group (transmission timing group 2) of different transmission timings
- cell 4 and cell 5 are different It is assumed that the transmission timing is the same transmission timing group (transmission timing group 3).
- cell 1 is the first cell
- the other cells (cell 2, cell 3, cell 4, cell 5) are the second cells.
- the base station device 3-1 assigns the physical uplink control channel PUCCH of the cell 1 to the mobile station device 1-1
- the base station device 3-2 assigns the physical uplink control channel PUCCH of the cell 4 to the mobile station device 1. -1 is assigned.
- the mobile station apparatus 1-1 If the transmission timing timer of the transmission timing group (transmission timing group 1) including the cell 1 which is the first cell has expired due to the information indicating whether or not it is a dual connection, the mobile station apparatus 1-1 The transmission timing timer of the transmission timing group (transmission timing group 2) provided by the base station apparatus 3-1 other than the transmission timing group (transmission timing group 1) including the first cell is stopped. Then, the mobile station device 1-1 transmits a cell other than the random access preamble transmission in the first cell (cell 1) to the cell (cell 1, cell 2, cell 3) provided by the base station device 3-1. Disable uplink transmission.
- the mobile station apparatus 1-1 erases all data stored in the transmission HARQ buffer corresponding to the cell (cell 1, cell 2, cell 3) of the base station apparatus 3-1 (or the base station apparatus)
- the transmission HARQ buffer corresponding to the cell 3-1 (cell 1, cell 2, cell 3) is flashed).
- the mobile station device 1-1 uses the radio resources of the uplink control channel PUCCH assigned to the first cell and the measurement assigned to the cells (cell 1, cell 2, cell 3) of the base station device 3-1. Release radio resources of the reference signal. Further, when uplink transmission permission information is acquired for the cell (cell 1, cell 2, cell 3) of the base station device 3-1, the mobile station device 1-1 transmits the uplink shared channel PUSCH. Discard transmission permission information.
- the mobile station apparatus 1-1 transmits the transmission timing group (transmission timing group that the transmission timing timer has expired). 2) uplink transmission other than random access preamble transmission in the cell (cell 3) is prohibited.
- the mobile station apparatus 1-1 erases the data stored in the transmission HARQ buffer corresponding to the cell (cell 3) of the transmission timing group (transmission timing group 2) whose transmission timing timer has expired.
- the mobile station apparatus 1-1 releases the radio resource of the reference signal for measurement allocated to the cell (cell 3) of the transmission timing group (transmission timing group 2) whose transmission timing timer has expired.
- the mobile station apparatus 1-1 uses the uplink shared channel.
- the PUSCH transmission permission information is discarded.
- the mobile station device 1-1 transmits the transmission timing group (transmission timing group 3) of the base station device 3-2. Uplink transmission other than random access preamble transmission is prohibited for the cells (cell 4, cell 5). Then, the mobile station device 1-1 erases the data stored in the transmission HARQ buffer corresponding to the cell (cell 4, cell 5) of the transmission timing group (transmission timing group 3) whose transmission timing timer has expired.
- the mobile station apparatus 1-1 uses the radio resources of the uplink control channel PUCCH assigned to the cells (cell 4 and cell 5) of the transmission timing group (transmission timing group 3) whose transmission timing timer has expired and the measurement reference signal. Free up radio resources. Also, when the uplink transmission permission information is acquired for the cells (cell 4 and cell 5) of the transmission timing group (transmission timing group 3) for which the transmission timing timer has expired, the mobile station apparatus 1-1 The transmission permission information of the link shared channel PUSCH is discarded.
- the mobile station apparatus 1 ⁇ 1 performs the same processing as when the transmission timing timer of the transmission timing group including the first cell expires.
- the transmission timing timer of the transmission timing group that does not include the cell to which the radio resource of the uplink control channel PUCCH is allocated expires, the transmission timing of the transmission timing group that includes the second cell that does not include the first cell The same processing as when the timer has expired is performed.
- the transmission timing timer of the transmission timing group provided by the base station apparatus 3-2 other than the transmission timing group including the cell to which the radio resource of the uplink control channel PUCCH is allocated is stopped.
- the mobile station apparatus 1-1 performs uplink transmission other than random access preamble transmission in a cell to which the radio resource of the uplink control channel PUCCH is allocated to the cell provided by the base station apparatus 3-2. Ban.
- the mobile station apparatus 1-1 erases all data stored in the transmission HARQ buffer corresponding to the cell of the base station apparatus 3-2.
- the mobile station apparatus 1-1 releases the radio resource of the assigned uplink control channel PUCCH and the radio resource of the reference signal for measurement assigned to the cell of the base station apparatus 3-2. Further, when the uplink transmission permission information is acquired for the cell of the base station device 3-2, the mobile station device 1-1 discards the transmission permission information of the uplink shared channel PUSCH.
- the mobile station apparatus 1-1 controls the transmission timing group for each base station apparatus.
- the base station apparatus can perform data transmission / reception control on the mobile station apparatus 1-1 without worrying about the operation of the other base station apparatus.
- Each base station device considers the amount of data from the mobile station device, etc., notifies the transmission timing information of each transmission timing group, stops the notification, and continues or stops the transmission timing timer. In other words, by enabling / disabling the transmission timing, the mobile station apparatus can perform efficient transmission control.
- the base station device 3-1 may be a cell other than the macro cell, for example, a small cell.
- the present invention can also be described as follows.
- the radio communication system of the present invention is a radio communication system in which one or more base station apparatuses communicate with a terminal apparatus via a plurality of cells, and the plurality of cells have a first uplink transmission timing.
- Each group is controlled using a transmission timing timer that starts or restarts when transmission timing information is applied for each of the groups, and the base station apparatus includes the first group and the second group.
- the terminal device corresponds to the cell of the group in which the transmission timing timer has expired when the connection with a plurality of base station devices is indicated by the control information and the transmission timing timer of the group has expired
- the data in the transmission HARQ buffer is erased.
- the connection with one base station apparatus is indicated by the control information, and the transmission timing timer of the first group has expired. If all the transmission HARQ buffer data corresponding to the plurality of cells are erased and the transmission timing timer of the second group expires, the transmission corresponding to the cell of the second group for which the transmission timing timer has expired Erase HARQ buffer data.
- the terminal device is connected to a plurality of base station devices by the control information, and the transmission timing timer of the group is When it expires, it releases the uplink control channel and the uplink reference signal assigned to the cells of the group whose transmission timing timer has expired.
- the connection with one base station device is indicated by the control information, and the transmission timing timer of the first group has expired.
- the uplink control channel and the uplink reference signal allocated to the plurality of cells are released, and when the transmission timing timer of the second group expires, the second group of the transmission timing timer expires. Release the uplink reference signal assigned to the cell.
- the base station apparatus of this invention is a base station apparatus which communicates with a terminal device via a several cell with a 1st base station apparatus, Comprising:
- the said several cell is 1st uplink transmission timing.
- a first group including the first cell, and one or more second cells having a second uplink transmission timing different from the first uplink transmission timing.
- Information related to the group from the first base station apparatus, controlled using a transmission timing timer that is started or restarted when transmission timing information is applied for each group. For controlling the group, information on the first group and information on the second group, information on the transmission timing timer, and the group And it notifies the control information to the terminal device.
- the terminal device of the present invention is a terminal device that communicates with one or more base station devices via a plurality of cells, and each of the plurality of cells has a first uplink transmission timing.
- a second group composed of the above-described cells and composed of a first group including the first cell and one or more second cells having a second uplink transmission timing different from the first uplink transmission timing. are controlled using a transmission timing timer that is started or restarted when transmission timing information is applied for each group, and the base station apparatus controls the first group and the second group.
- the terminal device when connection with a plurality of base station devices is indicated by the control information, and the transmission timing timer of the group expires, the terminal device An uplink control channel and an uplink reference signal assigned to a cell of a group whose timing timer has expired are released.
- the wireless communication method of the present invention is a wireless communication method of a wireless communication system in which one or more base station devices communicate with a terminal device via a plurality of cells.
- a first group including a first cell, and one or more cells having a second uplink transmission timing different from the first uplink transmission timing.
- the terminal device is connected to a plurality of base station devices according to the control information, and when the transmission timing timer of the group expires, the transmission timing timer A step of erasing data in a transmission HARQ buffer corresponding to a cell of an expired group, and a connection with one base station apparatus indicated by the control information, wherein the transmission timing timer of the first group When the transmission timing timer of the second group expires, and when the transmission timing timer of the second group expires, the step of erasing the data of all transmission HARQ buffers corresponding to the plurality of cells Erasing data in the transmit HARQ buffer corresponding to the cell.
- the integrated circuit of the present invention is an integrated circuit applied to a base station apparatus that communicates with a terminal apparatus through a plurality of cells together with the first base station apparatus, A first group including a first cell, and one or more cells having a second uplink transmission timing different from the first uplink transmission timing.
- the first base station apparatus is controlled by using a transmission timing timer that is grouped into a second group composed of second cells and that starts or restarts when transmission timing information is applied for each group.
- the integrated circuit of the present invention is an integrated circuit applied to a terminal device that communicates with one or more base station devices via a plurality of cells, and the plurality of cells includes a first uplink.
- Means for receiving information on the second group, information on the transmission timing timer, and control information for controlling the group, and the control In the case where connection to a plurality of base station apparatuses is indicated by the report, and when the transmission timing timer of the group expires, the data of the transmission HARQ buffer corresponding to the cell of the group for which the transmission timing timer has expired is stored. It has a means to erase.
- connection with one base station apparatus is indicated by the control information, and the transmission timing timer of the first group expires.
- a mobile station device is described as an example of a terminal device or a communication device, but the present invention is not limited to this, and is a stationary or non-movable electronic device installed indoors and outdoors.
- terminal devices or communication devices such as AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other daily life equipment.
- the mobile station apparatus 1-1, the base station apparatus 3-1 and the base station apparatus 3-2 of the embodiment have been described using functional block diagrams.
- the function of each part of the station apparatus 3-1 and the base station apparatus 3-2 or a program for realizing a part of these functions is recorded on a computer-readable recording medium, and the program recorded on the recording medium is recorded.
- the mobile station apparatus and the base station apparatus may be controlled by being read and executed by a computer system.
- 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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Abstract
Description
本願は、2013年8月20日に、日本に出願された特願2013-170066号に基づき優先権を主張し、その内容をここに援用する。
[構成説明]
図1は、本発明の実施形態に係る移動局装置の構成を示す図である。移動局装置1-1~1-3は、データ生成部101、送信データ記憶部103、送信HARQ処理部105、送信処理部107、無線部109、受信処理部111、受信HARQ処理部113、MAC情報抽出部115、PHY制御部117、MAC制御部119、データ処理部121、および、RRC制御部123から構成される。
図7~図15で説明したような無線通信システムを想定する。そして、図7が示すように、基地局装置3-1と複数の移動局装置1-1、1-2、1-3とが通信を行なう。また、図15で説明したマクロセルの基地局装置3-1およびスモールセルの基地局装置3-2と移動局装置1-1が複数のセルを介して通信を行なうような無線通信システムを想定する。
3-1、3-2 基地局装置
101、201 データ生成部
103、203 送信データ記憶部
105、205 送信HARQ処理部
107、207 送信処理部
109、209 無線部
111、211 受信処理部
113、213 受信HARQ処理部
115、215 MAC情報抽出部
117、217 PHY制御部
119、219 MAC制御部
121、221 データ処理部
123、223 RRC制御部
225 基地局装置間通信部
227 MME通信部
229 GW通信部
Claims (12)
- 第一の基地局装置と第二の基地局装置が複数セルを介して端末装置と通信を行う無線通信システムであって、
前記複数セルは、第一の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第一の基地局装置に属する第一のセルを含む第一のグループと、前記第一の上りリンク送信タイミングと異なる第二の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第二の基地局装置に属する第二のセルを含む第二のグループと、前記第一の上りリンク送信タイミングおよび前記第二の上りリンク送信タイミングと異なる第三の上りリンク送信タイミングを有する1つ以上の前記第一の基地局装置または前記第二の基地局装置に属する第三のセルから構成される第三のグループにグループ化され、
前記グループ毎に、送信タイミング情報を適用した場合にスタートまたはリスタートする送信タイミングタイマーを用いて制御され、
前記第一の基地局装置は、
前記グループに関する情報と前記送信タイミングタイマーの情報を前記端末装置に通知し、
前記端末装置は、
前記グループに関する情報に基づいて前記グループを管理し、
基地局装置単位で前記グループを制御する無線通信システム。 - 請求項1記載の無線通信システムであって、
前記端末装置は、
前記第一のグループの送信タイミングタイマーが満了した場合、前記第一のグループのセルおよび前記第一の基地局装置に属する前記第三のグループのセルに対応する送信HARQバッファのデータを消去し、
前記第二のグループの送信タイミングタイマーが満了した場合、前記第二のグループのセルおよび前記第二の基地局装置に属する前記第三のグループのセルに対応する送信HARQバッファのデータを消去し、
前記第三のグループの送信タイミングタイマーが満了した場合、前記送信タイミングタイマーが満了した前記第三のグループのセルに対応する送信HARQバッファのデータを消去する無線通信システム。 - 請求項2記載の無線通信システムであって、
前記第二の基地局装置に属する前記第二のセルに対する設定として、上りリンク制御チャネルが設定される無線通信システム。 - 第一の基地局装置と第二の基地局装置が複数セルを介して通信を行う端末装置であって、
前記複数セルは、第一の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第一の基地局装置に属する第一のセルを含む第一のグループと、前記第一の上りリンク送信タイミングと異なる第二の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第二の基地局装置に属する第二のセルを含む第二のグループと、前記第一の上りリンク送信タイミングおよび前記第二の上りリンク送信タイミングと異なる第三の上りリンク送信タイミングを有する1つ以上の前記第一の基地局装置または前記第二の基地局装置に属する第三のセルから構成される第三のグループにグループ化され、
前記グループ毎に、送信タイミング情報を適用した場合にスタートまたはリスタートする送信タイミングタイマーを用いて制御され、
前記第一の基地局装置から前記グループに関する情報と前記送信タイミングタイマーの情報を受信し、
前記グループに関する情報に基づいて前記グループを管理し、
基地局装置単位で前記グループを制御する端末装置。 - 請求項4記載の端末装置であって、
前記第一のグループの送信タイミングタイマーが満了した場合、前記第一のグループのセルおよび第一の基地局装置に属する前記第三のグループのセルに対応する送信HARQバッファのデータを消去し、
前記第二のグループの送信タイミングタイマーが満了した場合、前記第二のグループのセルおよび前記第二の基地局装置に属する前記第三のグループのセルに対応する送信HARQバッファのデータを消去し、
前記第三のグループの送信タイミングタイマーが満了した場合、送信タイミングタイマーが満了した前記第三のグループのセルに対応する送信HARQバッファのデータを消去する端末装置。 - 請求項5記載の端末装置であって、
前記第一のグループの送信タイミングタイマーが満了した場合、前記第一のセルに割り当てられている上りリンク制御チャネルを解放し、
前記第二のグループの送信タイミングタイマーが満了した場合、前記第二のセルに割り当てられている上りリンク制御チャネルを解放する端末装置。 - 請求項6記載の端末装置であって、
前記第一のグループの送信タイミングタイマーが停止している場合、前記第一のセルでのランダムアクセスプリアンブル送信以外の前記第一のグループのセルおよび前記第一の基地局装置に属する前記第三のグループのセルでの上りリンク送信を禁止し、
前記第二のグループの送信タイミングタイマーが満了した場合、前記第二のセルでのランダムアクセスプリアンブル送信以外の前記第二のグループのセルおよび前記第二の基地局装置に属する前記第三のグループのセルでの上りリンク送信を禁止する端末装置。 - 第一の基地局装置とともに複数セルを介して端末装置と通信を行う基地局装置であって、
前記複数セルは、第一の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第一の基地局装置に属する第一のセルを含む第一のグループと、前記第一の上りリンク送信タイミングと異なる第二の上りリンク送信タイミングを有する1つ以上のセルから構成され、自基地局装置に属する第二のセルを含む第二のグループと、前記第一の上りリンク送信タイミングおよび前記第二の上りリンク送信タイミングと異なる第三の上りリンク送信タイミングを有する1つ以上の前記第一の基地局装置または自基地局装置に属する第三のセルから構成される第三のグループにグループ化され、
前記グループ毎に、送信タイミング情報を適用した場合にスタートまたはリスタートする送信タイミングタイマーを用いて制御され、
前記第一の基地局装置から前記第二のグループおよび前記第一の基地局装置の前記第三のグループに関する情報と前記送信タイミングタイマーの情報を受信し、
前記第一のグループおよび前記第二のグループおよび前記第三のグループに関する情報と前記送信タイミングタイマーの情報を前記端末装置に通知する基地局装置。 - 第一の基地局装置と第二の基地局装置が複数セルを介して端末装置と通信を行う無線通信システムの無線通信方法であって、
前記複数セルは、第一の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第一の基地局装置に属する第一のセルを含む第一のグループと、前記第一の上りリンク送信タイミングと異なる第二の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第二の基地局装置に属する第二のセルを含む第二のグループと、前記第一の上りリンク送信タイミングおよび前記第二の上りリンク送信タイミングと異なる第三の上りリンク送信タイミングを有する1つ以上の前記第一の基地局装置または前記第二の基地局装置に属する第三のセルから構成される第三のグループにグループ化され、
前記グループ毎に、送信タイミング情報を適用した場合にスタートまたはリスタートする送信タイミングタイマーを用いて制御され、
前記第一の基地局装置は、
前記グループに関する情報と前記送信タイミングタイマーの情報を前記端末装置に通知するステップと、
前記端末装置は、
前記第一のグループの送信タイミングタイマーが満了した場合、前記第一のグループのセルおよび第一の基地局装置に属する前記第三のグループのセルに対応する送信HARQバッファのデータを消去するステップと、
前記第二のグループの送信タイミングタイマーが満了した場合、前記第二のグループのセルおよび前記第二の基地局装置に属する前記第三のグループのセルに対応する送信HARQバッファのデータを消去するステップと、
前記第三のグループの送信タイミングタイマーが満了した場合、前記送信タイミングタイマーが満了した前記第三のグループのセルに対応する送信HARQバッファのデータを消去するステップを含む無線通信方法。 - 第一の基地局装置とともに複数セルを介して端末装置と通信を行う第二の基地局装置に適用される集積回路であって、
前記複数セルは、第一の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第一の基地局装置に属する第一のセルを含む第一のグループと、前記第一の上りリンク送信タイミングと異なる第二の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第二の基地局装置に属する第二のセルを含む第二のグループと、前記第一の上りリンク送信タイミングおよび前記第二の上りリンク送信タイミングと異なる第三の上りリンク送信タイミングを有する1つ以上の前記第一の基地局装置または前記第二の基地局装置に属する第三のセルから構成される第三のグループにグループ化され、
前記グループ毎に、送信タイミング情報を適用した場合にスタートまたはリスタートする送信タイミングタイマーを用いて制御され、
前記第一の基地局装置から前記第二のグループおよび前記第一の基地局装置の前記第三のグループに関する情報と前記送信タイミングタイマーの情報を受信する手段と、
前記第一のグループおよび前記第二のグループおよび前記第三のグループに関する情報と前記送信タイミングタイマーの情報を前記端末装置に通知する手段を有する集積回路。 - 第一の基地局装置と第二の基地局装置が複数セルを介して通信を行う端末装置に適用される集積回路であって、
前記複数セルは、第一の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第一の基地局装置に属する第一のセルを含む第一のグループと、前記第一の上りリンク送信タイミングと異なる第二の上りリンク送信タイミングを有する1つ以上のセルから構成され、前記第二の基地局装置に属する第二のセルを含む第二のグループと、前記第一の上りリンク送信タイミングおよび前記第二の上りリンク送信タイミングと異なる第三の上りリンク送信タイミングを有する1つ以上の前記第一の基地局装置または前記第二の基地局装置に属する第三のセルから構成される第三のグループにグループ化され、
前記グループ毎に、送信タイミング情報を適用した場合にスタートまたはリスタートする送信タイミングタイマーを用いて制御され、
前記第一の基地局装置から前記グループに関する情報と前記送信タイミングタイマーの情報を受信する手段と、
前記グループに関する情報に基づいて前記グループを管理する手段と、
基地局装置単位で前記グループを制御する手段を有する集積回路。 - 請求項11記載の集積回路であって、
前記第一のグループの送信タイミングタイマーが満了した場合、前記第一のグループのセルおよび前記第一の基地局装置に属する前記第三のグループのセルに対応する送信HARQバッファのデータを消去する手段と、
前記第二のグループの送信タイミングタイマーが満了した場合、前記第二のグループのセルおよび前記第二の基地局装置に属する前記第三のグループのセルに対応する送信HARQバッファのデータを消去する手段と、
前記第三のグループの送信タイミングタイマーが満了した場合、前記送信タイミングタイマーが満了した前記第三のグループのセルに対応する送信HARQバッファのデータを消去する手段を有する集積回路。
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US14/912,238 US20160205649A1 (en) | 2013-08-20 | 2014-08-08 | Wireless communication system, base station apparatus, terminal apparatus, wireless communication method, and integrated circuit |
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WO2013015453A1 (en) * | 2011-07-27 | 2013-01-31 | Sharp Kabushiki Kaisha | Devices for multi-cell communications |
WO2013025237A1 (en) * | 2011-08-12 | 2013-02-21 | Intel Corporation | Forming carrier aggregation timing advance groups in a heterogeneous network |
JP2014204216A (ja) * | 2013-04-03 | 2014-10-27 | シャープ株式会社 | 端末装置、基地局装置、通信システム、通信方法および集積回路 |
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WO2013015453A1 (en) * | 2011-07-27 | 2013-01-31 | Sharp Kabushiki Kaisha | Devices for multi-cell communications |
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JP2014204216A (ja) * | 2013-04-03 | 2014-10-27 | シャープ株式会社 | 端末装置、基地局装置、通信システム、通信方法および集積回路 |
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See also references of EP3038419A4 |
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