WO2017022864A1

WO2017022864A1 - Wireless communication system, terminal device, base station device, wireless communication method, and integrated circuit

Info

Publication number: WO2017022864A1
Application number: PCT/JP2016/073344
Authority: WO
Inventors: 恭之加藤; 克成上村; 山田　昇平; 秀和坪井
Original assignee: シャープ株式会社
Priority date: 2015-08-06
Filing date: 2016-08-08
Publication date: 2017-02-09
Also published as: JP2018152628A

Abstract

The present invention configures a terminal device connected to a base station device so as to efficiently transmit a message 3 and receive a random access response message for a random access procedure. A wireless communication system in which a base station device and a terminal device execute a random access procedure, wherein: the terminal device sets the random access identification information used in the receipt of a random access response message as temporary terminal device identification information, when the random access response message is received via a physical downlink control channel; and the base station device sets the random access identification information used in the transmission of the random access response message as temporary terminal device identification information, when the random access response message is transmitted via the physical downlink control channel.

Description

Wireless communication system, terminal device, base station device, wireless communication method, and integrated circuit

The present invention relates to a technology of a wireless communication system, a terminal device, a base station device, a wireless communication method, and an integrated circuit.

In 3GPP (3rd Generation Partnership Project), 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.

On the other hand, in 3GPP, the third generation wireless access evolution (Long Term Evolution: LTE or Evolved Universal Terrestrial Radio Access: EUTRA) has been standardized, and LTE service has been started. An OFDM (Orthogonal-Frequency-Division-Multiplexing) scheme that is resistant to multipath interference and suitable for high-speed transmission is adopted as an LTE downlink communication scheme. In addition, as an uplink communication method, considering the cost and power consumption of the mobile station apparatus, a single carrier frequency division multiplexing SC-FDMA that can reduce the peak power to average power ratio PAPR (Peak to Average Power Ratio) of the transmission signal. (Single Carrier-Frequency Division Multiple Access) DFT (Discrete Fourier Transform) -spread OFDM system is adopted.

In addition, 3GPP continues to discuss LTE-Advanced (or Advanced-EUTRA), which is a further evolution of LTE. In LTE-Advanced, it is assumed that communication is performed at a maximum transmission rate of 1 Gbps or more and 500 Mbps or more of the uplink by using a band up to a maximum of 100 MHz bandwidth in the uplink and the downlink.

In LTE-Advanced, it is considered that a maximum of 100 MHz band is realized by bundling a plurality of bands compatible with LTE so that LTE mobile station apparatuses can be accommodated. In LTE-Advanced, one band of 20 MHz or less of LTE is called a component carrier (Component （Carrier: CC). The component carrier is also called a cell. Further, bundling a band of 20 MHz or less is called carrier aggregation (Carrier Aggregation: CA) (Non-patent Document 1).

On the other hand, in LTE-Advanced, a study on cost reduction of a mobile station apparatus corresponding to a specific category such as machine type communication (Machine Type Communication: MTC) or inter-machine communication (Machine To Machine Communication: M2M) is performed. (Non-Patent Document 2). Hereinafter, the MTC / M2M mobile station apparatus or the MTC / M2M communication device is also referred to as MTCUE (Machine Type Communication User Equipment).

In order to realize a low-cost MTCUE corresponding to the LTE standard and LTE-Advanced standard, the transmission / reception bandwidth is narrowed, the number of antenna ports / RF chains is reduced, the transmission / reception data transfer rate is reduced, and the half-duplex frequency division is performed. Cost reduction methods such as adoption of a multiplex (Half-duplex Frequency Division Duplex) method, reduction of transmission / reception power, and extension of intermittent reception intervals have been proposed. In addition, as a method for realizing low-cost MTCUE, it has been proposed that reduction of the maximum bandwidth of the transmission / reception RF circuit and transmission / reception baseband circuit of the MTCUE is effective.

In addition, MTC is not only considering cost reduction, but also studying coverage enhancement for extending the transmission / reception range of MTCUE. In order to extend the coverage, the base station apparatus repeatedly transmits downlink data or downlink signals to the MTCUE, and the MTCUE repeatedly transmits uplink data or uplink signals to the base station apparatus. (Non-patent Document 3).

For example, the base station apparatus repeatedly transmits the physical broadcast channel PBCH to the MTCUE multiple times within 40 ms. In the random access procedure, the MTCUE repeatedly transmits the same random access preamble using a plurality of physical random access channels PRACH. Then, the base station apparatus that has received the random access preamble repeatedly transmits a random access response message. Note that the base station apparatus notifies the MTCUE in the cell using the broadcast channel BCH or notifies each MTCUE individually (Non-patent Document 3).

For example, the number of repeated transmissions of the random access preamble or the number of repeated transmissions of the random access response message is notified by the broadcast channel BCH. In addition, the number of repeated transmissions of the random access preamble includes a plurality of types of repeated transmissions, and it has been considered that the MTCUE can select one number of repeated transmissions from a plurality of types of repeated transmissions.

Also, in order to reduce MTCUE reception processing, it has been proposed to perform transmission / reception of a random access response message using a physical downlink control channel (Non-Patent Document 4).

However, the base station apparatus cannot transmit data of 50 bits or more on the physical downlink control channel due to physical channel restrictions. The random access response message of the random access procedure has 50 bits or more, and it is necessary to reduce the data amount of the message.

The information transmitted in the random access response message includes the transmitted random access preamble number, uplink transmission permission information for message 3 transmission, and Temporary C-RNTI (temporary terminal device identification information) used in message 3 transmission. There is uplink transmission timing information, and such information needs to be reduced. However, these pieces of information are information for transmitting the message 3, and if the information is reduced, the terminal device cannot transmit the message 3.

Some aspects of the present invention have been made in view of such circumstances, and a wireless communication system for efficiently transmitting / receiving a random access response message and transmitting / receiving a message 3 by a terminal device and a base station device. An object of the present invention is to provide a technology related to a base station device, a terminal device, a wireless communication method, and an integrated circuit.

(1) In order to achieve the above object, some aspects of the present invention take the following measures. That is, a wireless communication system according to an aspect of the present invention is a wireless communication system in which a base station apparatus and a terminal apparatus execute a random access procedure, and the terminal apparatus transmits a random access response message using a physical downlink control channel. If received, the random access identification information used to receive the random access response message is set as temporary terminal device identification information, and the base station device transmits the random access response message on the physical downlink control channel. In this case, the random access identification information used for transmitting the random access response message is set as the temporary terminal device identification information.

(2) A radio communication system according to an aspect of the present invention is a radio communication system in which a base station apparatus and a terminal apparatus execute a random access procedure, and the base station apparatus includes system information and / or random access. A part of temporary terminal device identification information is notified by a response message, and the terminal device receives the system information and the random access response message, and is included in the information included in the system information and the random access response message. The temporary terminal device identification information is generated from at least two of information and random access identification information used for receiving the random access response message.

(3) A terminal apparatus according to an aspect of the present invention is a terminal apparatus that communicates with a base station apparatus and executes a random access procedure. When a random access response message is received on a physical downlink control channel, The random access identification information used for receiving the random access response message is set as temporary terminal device identification information.

(4) A terminal apparatus according to an aspect of the present invention is a terminal apparatus that communicates with a base station apparatus and executes a random access procedure, receives system information and a random access response message, and is included in the system information Tentative terminal device identification information is generated from at least two of the received information, the information included in the random access response message, and the random access identification information used for receiving the random access response message.

(5) A base station apparatus according to an aspect of the present invention is a base station apparatus that performs communication with a terminal apparatus and executes a random access procedure, and transmits a random access response message on a physical downlink control channel. Random access identification information used for transmission of the random access response message is set as temporary terminal device identification information.

(6) A base station apparatus according to an aspect of the present invention is a base station apparatus that communicates with a terminal apparatus and executes a random access procedure, and is a temporary terminal using system information and / or a random access response message Temporary terminal from at least two of information included in the system information, information included in the random access response message, and random access identification information used for transmission of the random access response message It is characterized by generating device identification information.

(7) A radio communication method according to an aspect of the present invention is a radio communication method in which a base station apparatus and a terminal apparatus execute a random access procedure, and the terminal apparatus transmits a random access response message to a physical downlink control channel. When receiving the random access response message, the base station device sets the random access response message as the temporary terminal device identification information, and the base station device transmits the random access response message to the physical downlink control channel. In the case of transmitting by using the random access response message, the random access identification information used for transmitting the random access response message is set as the temporary terminal device identification information.

(8) A radio communication method according to an aspect of the present invention is a radio communication method in which a base station device and a terminal device execute a random access procedure, and the base station device has system information and / or random access. A step of notifying a part of the provisional terminal device identification information in a response message, the terminal device receiving the system information and the random access response message, information included in the system information, and the random access response The method includes generating the temporary terminal device identification information from at least two of information included in the message and random access identification information used for receiving the random access response message.

(9) An integrated circuit according to an aspect of the present invention is an integrated circuit that is applied to a terminal device that communicates with a base station device and executes a random access procedure, and transmits a random access response message to a physical downlink control channel. And receiving the random access response message, the random access identification information used for receiving the random access response message is set as temporary terminal device identification information.

(10) An integrated circuit according to an aspect of the present invention is an integrated circuit that is applied to a terminal device that communicates with a base station device and executes a random access procedure, and receives system information and a random access response message. A circuit for generating temporary terminal device identification information from at least two of information included in the system information, information included in the random access response message, and random access identification information used to receive the random access response message It is characterized by having.

(12) An integrated circuit according to an aspect of the present invention is an integrated circuit that is applied to a base station apparatus that communicates with a terminal apparatus and executes a random access procedure, and transmits a random access response message to a physical downlink control channel. In the case of transmitting with the random access response message, the random access identification information used for transmitting the random access response message is provided as a temporary terminal device identification information.

(13) An integrated circuit according to an aspect of the present invention is an integrated circuit that is applied to a base station apparatus that communicates with a terminal device and executes a random access procedure, and includes system information and / or a random access response. A circuit for notifying a part of provisional terminal device identification information in a message, information included in the system information, information included in the random access response message, and random access identification information used for transmission of the random access response message. It has a circuit which generates the temporary terminal device identification information from at least two.

According to some aspects of the present invention, efficient transmission / reception of a random access response message and transmission / reception of message 3 can be performed in a terminal device and a base station device.

It is a figure which shows an example of a structure of MTCUE which concerns on embodiment of this invention. It is a figure which shows an example of a structure of the base station apparatus which concerns on embodiment of this invention. It is a figure which shows an example of the random access group which concerns on embodiment of this invention. It is a figure which shows an example of a process of the random access response message which concerns on embodiment of this invention. It is a figure which shows an example of a process of the random access response message which concerns on embodiment of this invention. It is a figure which shows the example of a physical channel structure in LTE. It is a figure which shows the channel configuration example of the downlink in LTE. It is a figure which shows the channel configuration example of the uplink in LTE. It is a figure which shows the structural example of the communication protocol regarding the control information of a base station apparatus and a mobile station apparatus. It is a figure which shows the structural example of the communication protocol regarding the user information of a base station apparatus and a mobile station apparatus. It is a figure which shows Contention based Random Access procedure. It is a figure which shows a Non-contention based Random Access procedure.

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

FIG. 6 is a diagram showing an LTE physical channel configuration. 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). In addition, 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). In addition, there is a physical signal of an uplink reference signal. 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). Hereinafter, unless otherwise specified, the measurement reference signal refers to a periodic measurement reference signal (Non-Patent Document 1).

FIG. 7 is a diagram illustrating an LTE downlink channel configuration. The downlink channels shown in FIG. 7 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. A channel DTCH (Dedicated Traffic Channel) is included.

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).

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.

Next, the logical channel will be described. The broadcast control channel BCCH is a downlink channel used for broadcasting system information (System 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.

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).

Next, the transport channel will be described. 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 is broadcast to the entire cell.

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.

Next, the physical channel will be described. 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 of the physical downlink shared channel PDSCH (downlink assignment), hybrid automatic repeat request (HARQ) information for downlink data, and radio 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 resource allocation. The physical downlink shared channel PDSCH is a channel used for transmitting downlink data or paging information.

Note that 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 physical 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.

In addition, 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.

Next, channel mapping will be described. As shown in FIG. 7, in the downlink, 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.

Also, in the downlink, 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. 8 is a diagram illustrating an LTE uplink channel configuration. The uplink channels shown in FIG. 8 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).

The uplink transport channel includes an uplink shared channel UL-SCH (Uplink Shared Channel) and a random access 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.

Next, the logical channel will be described. 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.

Next, the transport channel will be described. 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.

Next, the physical channel will be described. 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. ) To the base station apparatus. 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 (transmission timing command) from the mobile station apparatus to the base station apparatus. Random access preamble transmission is performed in a random access procedure.

Next, channel mapping will be described. As shown in FIG. 8, in the uplink, 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.

Also, in the uplink, 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. 9 is a protocol stack for handling control data of LTE mobile station apparatuses and base station apparatuses. FIG. 10 is a protocol stack for handling user data of LTE mobile station apparatuses and base station apparatuses. 9 and 10 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. Note that there may be a plurality of entities (entities) that perform roles in each hierarchy.

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. 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 (Buffer Status Report: BSR)), and makes a radio resource request for transmitting uplink data (scheduling) I have a request (Scheduling Request). The MAC layer executes a random access procedure when performing an initial access or a scheduling request.

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 (Radio Resource Control layer: RRC 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 signaling 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.

Explain the random access procedure. 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. 11 is a diagram showing a Contention based Random Access procedure. The Contention based Random Access procedure is a random access that may compete (collision) between mobile station devices, and the Contention based Random Access procedure is for the initial access from a state that is not connected (communication) with the base station device. This is performed for a scheduling request or the like when uplink data transmission is generated in the mobile station device while being connected to the base station device but being out of uplink synchronization.

FIG. 12 is a diagram showing the Non-contention based Random Access procedure. Non-contentionbased Random 手順 Access procedure is a random access in which contention does not occur between mobile station devices, and the base station device and the mobile station device are connected, but the mobile station is quickly connected when uplink synchronization is lost. The mobile station device starts random access when instructed by the base station device in special cases such as handover or when the transmission timing of the mobile station device is not valid to establish uplink synchronization between the device and the base station device. (Non-Patent Document 1). The Non-contention based Random Access procedure is instructed by an RRC (Radio Resource Control: Layer 3) layer message and control data of the physical downlink control channel PDCCH. Instructing the non-contention based Random Access procedure with the control data of the physical downlink control channel PDCCH is also referred to as PDCCHorder (random access instruction).

The Contention-based Random Access procedure will be briefly described with reference to FIG. First, the mobile station apparatus 1-1 transmits a random access preamble to the base station apparatus 5 (message 1: (1), step S1). The base station device 5 that has received the random access preamble transmits a response to the random access preamble (random access response message) to the mobile station device 1-1 (message 2: (2), step S2). The mobile station apparatus 1-1 transmits an upper layer (Layer2 / Layer3) message based on the uplink transmission permission information (Uplink grant: uplink grant) included in the random access response message (Message 3: ( 3), Step S3).

The base station apparatus 5 transmits a contention resolution message (contention resolution) to the mobile station apparatus 1-1 that has received the upper layer message of (3) (message 4: (4), step S4). Note that Contention based Random Access is also referred to as random preamble transmission.

手順 Non-contention based Random Access procedure will be briefly explained using Fig.12. First, the base station apparatus 5 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 5 that has received the random access preamble transmits a response to the random access preamble (random access response message) to the mobile station device 1-1 (message 2: (3 '), step S13). However, if the notified preamble number value is 0, the ContentionContentbased Random Access procedure is performed. Note that Non-contention based Random Access is also called dedicated preamble transmission.

The connection procedure from the mobile station apparatus 1-1 to the base station apparatus 5 will be described with reference to FIG. First, the mobile station apparatus 1-1 acquires system information of the base station apparatus 5 from the physical broadcast channel PBCH and the like, executes a random access procedure from random access related information included in the system information, and Connect. The mobile station apparatus 1-1 generates a random access preamble from the random access related information in the system information. Then, the mobile station apparatus 1-1 transmits a random access preamble using the random access channel RACH (message 1: (1)).

When the base station device 5 detects the random access preamble from the mobile station device 1-1, the base station device 5 calculates a transmission timing shift amount between the mobile station device 1-1 and the base station device 5 from the random access preamble, and (L2) / Layer3 (L3) scheduling (uplink radio resource position (position of physical uplink shared channel PUSCH), transmission format (message size), etc.) to transmit a message, Temporary C-RNTI (Cell -Radio Network Temporary Identity: mobile station apparatus identification information or terminal apparatus identification information) and a response (random access) addressed to the mobile station apparatus 1-1 that has transmitted the random access preamble of the random access channel RACH to the physical downlink control channel PDCCH RA-RNTI (Random Access-Radio Network Temporary Identity) indicating random response response) is arranged, and transmission timing information, uplink transmission permission information, Temporary C-RNTI (temporary) is assigned to the physical downlink shared channel PDSCH. Terminal device identification information) and a random access response message including the received random access preamble information (message 2: (2)).

When the mobile station apparatus 1-1 detects that the physical downlink control channel PDCCH has RA-RNTI, the mobile station apparatus 1-1 confirms the contents of the random access response message arranged in the physical downlink shared channel PDSCH and transmits the transmitted random access preamble. Information 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) is used in the scheduled radio resource and transmission format. The L2 / L3 message including information for identifying the mobile station device 1-1 is transmitted (message 3: (3)).

The mobile station device 1-1 starts the transmission timing timer when adjusting the transmission timing. While the transmission timing timer is operating (or running), the transmission timing is valid, and when the transmission timing timer expires or is stopped, the transmission timing is invalid. While the transmission timing is valid, the mobile station apparatus 1-1 can transmit data to the base station apparatus 5, and when the transmission timing is invalid, the mobile station apparatus 1-1 can only transmit a random access preamble. It is. In addition, 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.

When the base station apparatus 5 receives the L2 / L3 message from the mobile station apparatus 1-1, the base station apparatus 5 uses the C-RNTI (or Temporary C-RNTI) or IMSI included in the received L2 / L3 message. A contention resolution (Contention Resolution) message for determining whether or not contention (collision) occurs between 1-1 to 1-3 is transmitted to the mobile station device 1-1 (message 4: (4)).

When the mobile station apparatus 1-1 transmits an L2 / L3 message, it starts a contention resolution timer. If the mobile station apparatus 1-1 receives a contention resolution message while the contention resolution timer is operating, the mobile station apparatus 1-1 ends the random access procedure.

If 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 in the random access response reception period (Random | Access | Response | window), it will transmit message 3 If it fails or if the identification information of the mobile station apparatus 1-1 is not detected in the contention resolution message before the contention resolution timer expires, transmission of a random access preamble (message 1) : Redo from (1)).

When the number of random access preamble transmissions exceeds the maximum number of random access preamble transmissions indicated in the system information, the mobile station apparatus 1-1 determines that the radio link failure (radio link failure) and reestablishes the connection. Process. After the random access procedure is successful, control data for connection is further exchanged between the base station apparatus 5 and the mobile station apparatus 1-1. At this time, the base station apparatus 5 notifies the mobile station apparatus 1-1 of the uplink reference signal to be individually allocated and the allocation information of the physical uplink control channel PUCCH.

For updating the uplink transmission timing after the random access procedure is completed, the base station apparatus 5 measures the uplink reference signal (the measurement reference signal or the demodulation reference signal) transmitted from the mobile station apparatus 1-1. Thus, the transmission timing is calculated, and a transmission timing message including the calculated transmission timing information is notified to the mobile station apparatus 1-1.

When the mobile station apparatus 1-1 updates the transmission timing indicated by the transmission timing message notified from the base station apparatus 5, the mobile station apparatus 1-1 restarts the transmission timing timer. Note that the base station apparatus 5 also holds the same transmission timing timer as that of the mobile station apparatus 1-1. When transmission timing information is transmitted, the transmission timing timer is started or restarted. In this way, the base station apparatus 5 and the mobile station apparatus 1-1 manage the uplink synchronization state. Note that the transmission timing is invalid when the transmission timing timer expires or when the transmission timing timer is not operating.

3GPP is also discussing LTE-Advanced for further evolution of LTE. In LTE-Advanced, it is assumed that communication at a maximum transmission rate of 1 Gbps or more and uplink 500 Mbps or more is performed using a bandwidth up to a maximum of 100 MHz bandwidth in the uplink and downlink.

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

Also, 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.

On the other hand, in LTE-Advanced, a study on cost reduction of a mobile station apparatus for a specific category such as a mobile station apparatus corresponding to machine type communication (Machine Type Communication: MTC) or inter-machine communication (Machine To Machine: M2M). (Non-patent Document 2). Hereinafter, the MTC / M2M mobile station apparatus or the MTC / M2M communication device is also referred to as MTCUE (Machine Type Communication User Equipment).

In addition, in order to compensate for a decrease in reception and transmission characteristics due to the influence of a reduction in the number of antenna ports, downlink data or downlink signals are repeatedly transmitted to MTCUE for one data transmission, and MTCUE is transmitted once. It is considered that uplink data or an uplink signal is repeatedly transmitted to the base station apparatus in response to the data transmission.

In addition, in the study of MTC, not only cost reduction, but also coverage extension (Coverage Enhancement) for extending the transmission / reception range of MTCUE is being studied. In order to reduce transmission / reception power and expand coverage, the base station apparatus repeatedly transmits downlink data or downlink signals to MTCUE for one data transmission, and MTCUE performs one data transmission. On the other hand, it is considered that uplink data or an uplink signal is repeatedly transmitted to the base station apparatus.

MTCUE repeatedly receives data from the base station apparatus for one data reception, adds the repeatedly received data, and demodulates the data. Also, the base station apparatus repeatedly receives data from the MTCUE, adds the repeatedly received data, and demodulates the data.

For example, the base station apparatus repeatedly transmits the physical broadcast channel PBCH to the MTCUE multiple times within 40 ms. Further, the base station apparatus repeatedly transmits the physical downlink shared channel PDSCH, the physical downlink control channel PDCCH, and the extended physical control channel EPDCCH (enhanced Physical Downlink Control Channel) to the MTCUE a plurality of times. The MTCUE repeatedly transmits the physical uplink shared channel PUSCH, the physical uplink control channel PUCCH, and the like to the base station apparatus a plurality of times.

In the random access procedure, the MTCUE repeatedly transmits the same random access preamble using a plurality of physical random access channels PRACH. Then, the base station apparatus that has received the random access preamble repeatedly transmits a random access response message. Message 3 and contention resolution are also transmitted repeatedly. Note that the base station apparatus notifies the MTCUE in the cell of the number of repeated transmissions and receptions using the broadcast channel BCH, or notifies each MTCUE individually (Non-patent Document 3).

For example, the number of repetitions of random access preamble transmission is reported on the broadcast channel BCH. In addition, the number of repetitions of random access preamble transmission includes a plurality of types of repetition transmissions, and it has been studied that the MTCUE can select one number of repetitions of transmission from a plurality of types of repetition transmissions. One repeated transmission is also referred to as one trial.

Repetition control for the reception of the physical downlink control channel PDCCH, the reception of the extended physical control channel EPDCCH, the transmission of the physical uplink control channel PUCCH and the transmission of the physical random access channel PRACH (or random access preamble) is repeated or repeated. The repeat control for reception of the physical downlink shared channel PDSCH and transmission of the physical uplink shared channel PUSCH is also called bundling or bundling control.

When bundling is set, the bundle size defines the number of subframes for one bundle. Bundling operations rely on HARQ entities that invoke the same HARQ process for each transmission that makes up the same bundle. Within one bundle, HARQ retransmissions are non-adaptive and are triggered without waiting for feedback from previous transmissions depending on the bundle size. The HARQ feedback of one bundle is received (HARQ-ACK for PUSCH) or transmitted (HARQ-ACK for PDSCH) by the terminal device only for the last subframe of the bundle. The bundling process is performed in the MAC layer.

In addition, it is designed for machine type communication (Machine Type Communication: MTC) or machine communication (Machine To Machine: M2M), a mobile station device or MTC / M2M communication device that supports cost reduction and / or coverage expansion. , MTCUE (Machine Type Communication User Equipment) However, the use of such a mobile station apparatus is not limited to machine type communication or communication between machines. In addition, a mobile station apparatus that does not have features such as cost reduction and coverage expansion is simply shown as a mobile station apparatus below.

(Embodiment)
[Configuration description]
FIG. 1 is a diagram illustrating a configuration of an MTCUE according to an embodiment of the present invention. The MTCUEs 3-1 to 3-3 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 information extraction unit. 115, a PHY control unit 117, a MAC control unit 119, a data processing unit 121, and an RRC control unit 123.

User data from the upper layer and control data from the RRC control unit 123 are input to the data generation unit 101. 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 FourierTransform (Discrete Fourier Transform))-IFFT (Inverse Fast Fourier Transform (Inverse Fast Fourier Transform)) processing on the modulated and encoded data, and after processing, CP (Cyclic prefix) is processed. The data after insertion and CP insertion is placed on the physical uplink shared channel (PUSCH) of each uplink component carrier (cell) and output to the radio section 109.

In addition, 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. 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. Note that the transmission processing unit 107 repeatedly performs transmission processing based on an instruction from the PHY control 117.

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. When the reception processing unit 111 demodulates the physical downlink control channel PDCCH or the extended physical downlink control channel EPDCCH and detects the downlink allocation information of the own device, the reception processing unit 111 determines the physical downlink shared channel based on the downlink allocation information. PDSCH demodulation is performed, 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. Further, the reception processing unit 111 demodulates the physical downlink control channel PDCCH or the extended physical 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 processing unit 111 repeatedly performs reception processing based on an instruction from the PHY control 117.

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. 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 and extracts control information (for example, random access response or contention resolution) of the MAC layer (Medium Access Control layer) from the data input from the reception HARQ processing unit 113. The MAC control information (MAC Control Element) is output 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 method from the modulation / coding scheme and transmission power information notified from the MAC control unit 119 and notifies the radio unit 109 of the transmission power information.

In addition, when the PHY control unit 117 is notified of the PRACH repetition level or the number of repetitions from the MAC control unit 119, the random access preamble is repeatedly transmitted and the random access response is transmitted with the number of repetitions based on the notified PRACH repetition level. The transmission processing unit 107 and the reception processing unit 111 are controlled to perform repeated reception, repeated transmission of message 3, and repeated reception of contention resolution.

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 performs data transmission priority 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 order is determined, and the transmission data storage unit 103 is notified of information regarding data to be transmitted. Further, the MAC control unit 119 notifies the transmission HARQ processing unit 105 of HARQ information, and outputs the modulation / coding scheme to the PHY control unit 117.

Further, 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. When acquiring the success / failure information of the data decoding process from the reception HARQ processing unit 113, the MAC control unit 119 instructs the PHY control unit 117 to transmit an ACK or NACK signal.

Further, the MAC control unit 119 executes a random access procedure. The MAC control unit 119 performs processing such as selection of a random access preamble, reception processing of a random access response message, management of a contention resolution timer, and the like. The MAC control unit 119 notifies the PHY control unit 117 of information necessary for random access preamble transmission, random access response message reception, message 3 transmission, and contention resolution reception.

The MAC control unit 119 acquires transmission timing timer information from the RRC control unit 123. The MAC control unit 119 manages validity / invalidity of uplink transmission timing using a transmission timing timer. The MAC control unit 119 outputs transmission timing information (transmission timing command) 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. When the transmission timing is applied, the MAC control unit 119 starts or restarts the transmission timing timer.

When the transmission timing timer expires, the MAC control unit 119 instructs to erase data stored in the transmission HARQ processing unit 105. 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. Further, the MAC control unit 119 discards the uplink transmission permission information.

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 (Power Headroom Report: PHR) that is transmission power information, and outputs it to the transmission data storage unit 103.

The RRC control unit 123 performs various settings for communication with the base station device 5 such as connection establishment (connection establishment) / connection release (connection release) with the base station device 5, data transmission control setting of control data and user data, and the like. Do. 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 own MTCUE 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.

When the system information is acquired, the RRC control unit 123 outputs necessary information to the MAC control unit 119 and the PHY control unit 117. 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.

Further, when the RRC control unit 123 acquires the system information for MTCUE, the RRC control unit 123 sets a repetition mode (bundling mode, repeated transmission / reception mode). In the case of MTCUE, the repetition mode may be set.

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, and 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 5 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, a reception HARQ processing unit 213, a MAC information extraction unit 215, and a PHY control. 217, MAC controller 219, data processor 221, and RRC controller 223.

User data from the upper layer and control data from the RRC control unit 223 are input to the data generation unit 201. 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 / coded data to signals such as the physical downlink control channel PDCCH, the downlink synchronization signal, the physical broadcast channel PBCH, and the physical downlink shared channel PDSCH, and the mapped data. Are subjected to OFDM signal processing such as serial / parallel conversion, IFFT (Inverse Fourier Transform) conversion, CP insertion, and the like to generate an OFDM signal.

Then, the transmission processing unit 207 outputs the generated OFDM signal to the wireless unit 209. In addition, 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. In addition, the transmission processing unit 207 also performs repeated transmission processing based on an instruction from the PHY control 217.

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) processing, decoding, demodulation processing, and the like on the signal input from the wireless unit 209. The reception processing unit 211 repeatedly performs reception processing based on an instruction from the PHY control 217.

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. Also, the reception processing unit 211 calculates uplink radio quality from the uplink measurement reference signal of the MTCUE 3-1, and outputs the uplink radio quality information to the RRC control unit 223 and the MAC control unit 219.

Also, the reception processing unit 211 performs a random access preamble detection process with the number of repetitions instructed from the PHY control unit 217. When the reception processing unit 211 detects a random access preamble, it calculates 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. When receiving the retransmission data, 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 MAC layer control data from the data input from the reception HARQ processing unit 213, and outputs the extracted MAC layer 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 PHY control unit 217 controls the transmission processing unit 207, the radio unit 209, and the reception processing unit 211 according to an instruction from the MAC control unit 219. The PHY control unit 217 notifies the transmission processing unit 207 of the modulation / coding method from the modulation / coding scheme and transmission power information notified from the MAC control unit 219 and notifies the radio unit 209 of the transmission power information.

Also, the PHY control unit 217 notifies the reception processing unit 211 of information necessary for the random access preamble reception process from information related to the random access procedure.

In addition, when the PHY control unit 217 is notified of the repetition level or the number of repetitions from the MAC control unit 219, the transmission processing unit 207 performs repeated transmission or reception with the number of repetitions based on the notified repetition level. The reception processing unit 211 is controlled.

In addition, when there is a random access response message creation request from the MAC control unit 219, the PHY control unit 217 creates a random access response message in the format for the downlink control channel PDCCH and notifies the transmission processing unit 207 of it.

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 receives downlink transmission data response information (ACK / NACK), downlink radio quality information (CQI), uplink radio quality information, and uplink transmission request information (scheduling request) input from the reception processing unit 211. ) Based on the control information input from the MAC information extraction unit 215 and the data amount information for each user acquired from the transmission data storage unit 203, the number of repeated transmissions and receptions, and the reception operation state of the MTCUE 3-1, the downlink and uplink Performs scheduling processing. The MAC control unit 219 outputs the schedule result to the transmission processing unit 207. Further, the MAC control unit 219 determines the reception operation state of the MTCUE 3-1 from the intermittent reception parameter acquired from the RRC control unit 223.

Further, 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. When acquiring the success / failure information of the data decoding process from the reception HARQ processing unit 213, the MAC control unit 219 instructs the transmission processing unit 207 to transmit an ACK or NACK signal.

Further, the MAC control unit 219 executes a random access procedure. The MAC control unit 219 performs processing such as random access response message transmission processing, message 3 reception processing, contention resolution transmission processing, and contention resolution timer management. The MAC control unit 219 notifies the PHY control unit 217 of information necessary for random access preamble reception, random access response message transmission, message 3 reception, and contention resolution transmission.

When the RRC control unit 223 is instructed to transmit a random access response message using the physical downlink shared channel PDSCH, and when the random access preamble number and the transmission timing are acquired from the reception processing unit 211, the MAC control unit 219 A random access response message is created, and the random access response message is output to the transmission data storage unit 203.

When the RRC control unit 223 is instructed to transmit a random access response message using the physical downlink shared channel PDSCH, and when the random access preamble number and the transmission timing are acquired from the reception processing unit 211, the MAC control unit 219 RA-RNTI, transmission timing information, and uplink transmission permission information are notified to the PHY control unit 217 to request creation of a random access response message.

Further, when the MAC control unit 219 acquires 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.

Note that the MAC control unit 219 determines whether it is an MTCUE or a mobile station device based on the random access preamble number notified from the reception processing unit 211. Then, it is determined whether repeated transmission or repeated reception is necessary for transmission of the random access response message, transmission of the contention resolution, and reception of the message 3, and transmission of the random access response message, transmission of the contention resolution, and message 3 Scheduling reception of

The MAC control unit 219 manages uplink transmission timing. The MAC control unit 219 manages the uplink transmission timing of the MTCUE 3-1 using a transmission timing timer. When the MAC control unit 219 transmits a transmission timing message to the MTCUE 3-1, the MAC control unit 219 starts or restarts the transmission timing timer.

In the MTCUE 3-1, the MAC control unit 219 instructs the reception HARQ processing unit 213 to erase the data stored in the MTCUE 3-1. The MAC control unit 219 notifies the RRC control unit 223 to release the radio resources of the physical uplink control channel PUCCH and the uplink measurement reference signal allocated to the MTCUE 3-1. Also, the MAC control unit 219 stops uplink data scheduling for the MTCUE 3-1.

The RRC control unit 223 performs communication with the MTCUE 3-1 such as connection establishment (connection establishment) / connection release (connection release) processing with the MTCUE 3-1, data transmission control setting for control data and user data of the MTCUE 3-1, etc. Various settings are performed, information is exchanged with an upper layer according to the various settings, and lower layers are controlled according to the various settings.

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 creates a message including system information. Note that the RRC control unit 223 may separately create a message including system information for the MTCUE 3-1 and a message including system information for the mobile station apparatus 1-1.

The RRC control unit 223 notifies the PHY control unit 217 and the MAC control unit 219 of information related to the random access procedure included in the system information. Further, the RRC control unit 223 sends information indicating whether to transmit a random access response message on the physical downlink shared channel PDSCH or to transmit a random access response message on the physical downlink control channel PDCCH to the MAC control unit 219. Notice.

In addition, the RRC control unit 223 randomly transmits a random access response message on the physical downlink shared channel PDSCH or information indicating that the random access response message is transmitted on the physical downlink control channel PDCCH in the system information. Either an access response message is transmitted on the physical downlink shared channel PDSCH or a random access response message is transmitted on the physical downlink control channel PDCCH.

Also, 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. 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 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, and the RRC control unit 223 performs operations of the RRC layer.

[Description of operation]
A wireless communication system as described with reference to FIGS. 6 to 12 is assumed. As shown in FIG. 6, the base station apparatus 5 communicates with the MTCUEs 3-1, 3-2, and 3-3 or the mobile station apparatuses 1-1, 1-2, and 1-3.

The operation of MTCUE 3-1 and base station apparatus 5 will be described. The MTCUE 3-1 performs cell search and finds one cell of the base station apparatus 5. The MTCUE 3-1 receives the cell physical broadcast channel PBCH and the like, and acquires system information (cell physical channel configuration, transmission power information, information related to the random access procedure, transmission timing timer information, etc.).

Note that the base station apparatus 5 may divide system information into system information notified to the MTCUE 3-1 and system information notified to the mobile station apparatus 1-1. Further, the base station apparatus 5 may set different contents depending on the contents of the system information notified to the MTCUE 3-1 and the contents of the system information notified to the mobile station apparatus 1-1.

For example, the base station device 5 notifies the system information block type 1 (System Information Block Type1: SIB1) of the conventional system information to the mobile station device 1-1. Further, the base station device 5 may notify the MTCUE 3-1 of the new system information System Information Block Type 1A (System Information Block Type 1A: SIB1A).

The information related to the random access procedure for MTCUE 3-1 includes random access channel configuration information including physical random access channel PRACH arrangement information and random access preamble generation information, random access preamble selection information, PRACH repetition level ( Repetition (Level) information, random access preamble transmission power information, random access preamble maximum transmission count information, random access response message reception information, message 3 transmission information, and contention resolution message reception random information Consists of access common setting information.

The information on the PRACH repetition level may include information on the number of repetitions of the random access preamble (Number （of petition) for each PRACH repetition level. Further, the information on the PRACH repetition level may include information (RepetitionLevelMax) indicating the maximum PRACH repetition level. Further, the information on the PRACH repetition level may include information for selecting the PRACH repetition level (for example, RSRP (Reference Symbol Received Power), RSRQ (Reference Symbol Symbol Received Quality), information related to a path loss threshold). Information regarding the PRACH repetition level may be included in the selection information of the random access preamble.

The random access preamble selection information includes group information of the random access preamble as shown in FIG. 3 (for example, information on the number of random access preambles of each group), information indicating the relationship between the group information of the random access preamble and the PRACH repetition level. May be included.

The selection information of the random access preamble includes the total number N of random access preambles that can be selected by the MTCUE 3-1, the number M of random access preambles in the preamble group A, or the number of random access preambles (NM) in the preamble group B, The repetition level information corresponding to each group may be included. The number of preamble groups may be three or more.

The information regarding the maximum number of transmissions of the random access preamble may be the maximum number of transmissions for one repeated transmission attempt (attempt).

In addition, information regarding the maximum number of transmissions of the random access preamble, information regarding reception of the random access response message, information regarding transmission of the message 3, and information regarding reception of the contention resolution message are configured in a plurality corresponding to the repetition level of the random access preamble. May be.

The information related to the random access procedure for the mobile station apparatus 1-1 includes random access channel setting information including random physical access channel PRACH arrangement information and random access preamble generation information, random access preamble selection information, and random access. Random access common setting information including information on preamble transmission power, information on the maximum number of transmissions of random access preamble, information on reception of random access response message, information on transmission of message 3 and information on reception of contention resolution message .

Note that the random access common setting information of the system information received by the mobile station apparatus 1-1 and the random access common setting information of the system information broadcasted to the MTCUE 3-1 are independent and may be different.

After receiving the system information for MTCUE, MTCUE 3-1 sets parameters included in the system information. In addition, the MTCUE 3-1 sets a mode (operation) in which transmission / reception is repeatedly performed (hereinafter referred to as a repetition mode). Note that the RRC layer of the MTCUE 3-1 sets the repetition mode based on the setting received from the base station apparatus 5.

The MTCUE 3-1 executes a random access procedure in order to connect to the base station apparatus 5. Note that the MAC layer of the MTCUE 3-1 executes a random access procedure. In the following, a random access procedure when the repetition mode is set in the MTCUE 3-1 will be described.

The MAC layer of MTCUE3-1 sets random access common setting information. Further, the MAC layer of MTCUE 3-1 initializes parameters and the like related to the random access procedure. For example, the preamble transmission counter indicating the number of random access preamble transmissions (or the number of random access preamble attempts) is set to 1. The buffer for message 3 transmission is flushed (erased).

Next, selection processing of random access resources for random access preamble transmission is performed. The case where the message 3 is not transmitted, that is, the case of the first random access preamble transmission (first trial of random access preamble transmission) will be described. The MAC layer of the MTCUE 3-1 selects a PRACH repetition level based on a downlink radio propagation path (or downlink path loss (path loss)), and selects the selected PRACH repetition level as a temporary PRACH repetition level ( Set to Temporary (PRACH (Repetition Level)).

Then, the MAC layer of MTCUE 3-1 sets the maximum number of transmissions (eg, preambleTransMax_rl) of the PRACH repetition level corresponding to the temporary PRACH repetition level. Further, the MAC layer of MTCUE 3-1 selects a preamble group corresponding to the temporary PRACH repetition level.

Note that the MAC layer of the MTCUE 3-1 may first select a preamble group and then select a temporary PRACH repetition level.

Next, the case where message 3 is retransmitted, that is, the case of retransmission of random access preamble (retry of random access preamble transmission) will be described. When the MAC layer of the MTCUE 3-1 performs the first random access preamble transmission for the set temporary PRACH repetition level (or tries the first random access preamble transmission), the MAC layer of the MTCUE 3-1 is set to the temporary PRACH repetition level. Sets the maximum number of transmissions for the corresponding PRACH repetition level. Also, the MAC layer of MTCUE 3-1 selects a preamble group corresponding to the temporary PRACH repetition level.

Further, if the MAC layer of MTCUE 3-1 is not the first random access preamble transmission for the set temporary PRACH repetition level (or if it is not the first random access preamble transmission attempt), A preamble group used for transmission of a random access preamble corresponding to transmission is selected.

After selecting the preamble group, the MAC layer of the MTCUE 3-1 randomly selects a random access preamble from random access preambles belonging to (classified) the selected preamble group.

The MAC layer of MTCUE 3-1 selects a random access channel PRACH that can be transmitted. The random access channel PRACH that can be transmitted may be the first random access channel PRACH from which repeated transmission is started. The MAC layer of the MTCUE 3-1 calculates the reception power of the random access preamble assumed by the base station apparatus 5.

The MAC layer of the MTCUE 3-1 then selects the selected random access preamble number (preamble ID), the selected random access channel PRACH, the temporary PRACH repetition level (or the number of repetitions corresponding to the temporary PRACH repetition level), RA -RNTI (random access identification information) and the received power of the calculated random access preamble are notified to the physical layer of MTCUE 3-1.

The physical layer of MTCUE 3-1 generates a random access preamble using a random access preamble number. The physical layer of the MTCUE 3-1 calculates the transmission power of the random access preamble using the reception power of the random access preamble.

The physical layer of MTCUE 3-1 transmits the generated random access preamble to the selected random access channel PRACH with the calculated transmission power. Further, the physical layer of MTCUE 3-1 transmits the random access preamble as many times as the number of repetitions corresponding to the temporary PRACH repetition level.

After the random access preamble is transmitted, the MTCUE3-1 physical layer randomly transmits the RA-RNTI notified from the MAC layer of the MTCUE3-1 on the physical downlink control channel PDCCH or the extended physical downlink control channel E-PDCCH. Monitor during the access response reception period (Random Access Response Window).

When the random access response message is notified by the physical downlink shared channel PDSCH, the MAC layer of the MTCUE 3-1 at least selects the subframe number (or frame number) of the selected random access channel PRACH and the frequency of the random access channel PRACH. RA-RNTI is calculated from the information.

Further, when the random access response message is notified by the physical downlink control channel PDCCH or the extended physical downlink control channel E-PDCCH, the MAC layer of the MTCUE 3-1 selects at least the number of the selected random access preamble. RA-RNTI is calculated from position information of the random access channel PRACH (for example, the subframe number and frame number of the selected random access channel PRACH and the frequency position of the random access channel PRACH).

The MTCUE 3-1 determines whether the random access response is notified from the base station apparatus 5 using the physical downlink control channel PDCCH, the extended physical downlink control channel E-PDCCH, or the physical downlink shared channel PDSCH. If it can be determined, the MAC layer of the MTCUE 3-1 calculates one of the RA-RNTIs and notifies the physical layer of the MTCUE 3-1.

In cases other than the above, the MTCUE 3-1 calculates the RA-RNTI of both of the MAC layers of the MTCUE 3-1, and notifies the physical layer of the MTCUE 3-1 of two RA-RNTIs.

The base station apparatus 5 may notify the MTCUE 3-1 by including information on which physical channel the random access response message is notified in the system information for MTCUE. The MTCUE 3-1 may determine on which physical channel the random access response message is notified from the system information for MTCUE.

Note that the random access response received by the MTCUE 3-1 on the physical downlink control channel PDCCH may be called a physical downlink control channel random access response (PDCCHDCRandom Access Response). Further, the random access response received on the physical downlink shared channel PDSCH may be called a MAC random access response (MACandRandom Access Response).

The physical layer of the MTCUE 3-1 detects the RA-RNTI in the physical downlink control channel PDCCH or the extended physical downlink control channel E-PDCCH, and detects the physical downlink control channel PDCCH or the extended physical downlink control channel E. When the random access response message is included in the PDCCH, the obtained random access response message (or transmission timing information and uplink transmission permission information) is notified to the MAC layer of the MTCUE 3-1.

Further, the physical layer of the MTCUE 3-1 detects the RA-RNTI in the physical downlink control channel PDCCH or the extended physical downlink control channel E-PDCCH, and performs physical downlink control channel PDCCH or extended physical downlink control. When the schedule information of the random access response message is included in the channel E-PDCCH, the data of the physical downlink shared channel PDSCH is decoded based on the schedule information. The physical layer of MTCUE3-1 notifies the data (random access response message) obtained by decoding to the MAC layer of MTCUE3-1.

Note that the physical layer of the MTCUE 3-1 may notify the MAC layer of the MTCUE 3-1 of which physical channel the acquired random access response message is acquired from.

Note that the physical layer of the MTCUE 3-1 performs reception processing by repetition for reception processing for the random access response message. That is, the physical layer of the MTCUE 3-1 repeatedly performs reception processing on the physical downlink control channel PDCCH, the extended physical downlink control channel E-PDCCH, and / or the physical downlink shared channel PDSCH. The number of repeated receptions may be set corresponding to the temporary PRACH repetition level.

When reception of random access response message is notified from the physical layer of MTCUE3-1 on the physical downlink shared channel PDSCH (or reception of reception of MAC random access response from the physical layer of MTCUE3-1), MTCUE3-1 The MAC layer performs the following processing.

When the random access preamble number (preamble ID) corresponding to the random access preamble transmitted in the random access response message is included, the MAC layer of the MTCUE 3-1 determines that the random access response message has been successfully received. Also, the MAC layer of MTCUE 3-1 processes transmission timing information (transmission timing command) included in the random access response message.

The MAC layer of MTCUE 3-1 notifies the physical layer of MTCUE 3-1 of the uplink transmission permission information included in the random access response message. The MAC layer of MTCUE 3-1 sets Temporary C-RNTI (temporary terminal device identification information) included in the random access response message. Then, the MAC layer of the MTCUE 3-1 processes transmission data for transmitting the message 3.

When reception of random access response message is notified from the physical layer of MTCUE3-1 on physical downlink control channel PDCCH or extended physical downlink control channel E-PDCCH (or physical downlink control from physical layer of MTCUE3-1) When receiving the reception of the channel random access response), the MAC layer of the MTCUE 3-1 performs the following process.

When the reception of the random access response message is notified on the physical downlink control channel PDCCH or the extended physical downlink control channel E-PDCCH, the MAC layer of the MTCUE 3-1 determines that the reception of the random access response message is successful. . Also, the MAC layer of MTCUE 3-1 processes transmission timing information (transmission timing command) included in the random access response message.

The MAC layer of MTCUE 3-1 notifies the physical layer of MTCUE 3-1 of the uplink transmission permission information included in the random access response message. The MAC layer of MTCUE3-1 sets RA-RANI used for receiving the random access response message as Temporary C-RNTI. Then, the MAC layer of the MTCUE 3-1 processes transmission data for transmitting the message 3.

The MAC layer of the MTCUE 3-1 may determine that the reception of the random access response message has been successful when notified of the transmission timing information and the uplink transmission permission information from the physical layer of the MTCUE 3-1. .

When the random access preamble number is notified from the base station apparatus 5 by the random access instruction and the MAC layer of the MTCUE 3-1 has not selected the random access preamble, the MAC layer of the MTCUE 3-1 Judge that the access procedure was successful.

When the random access response message is not received within the random access response reception period, or when the preamble number corresponding to the transmitted random access preamble is not included in the received random access response message, the MAC layer of the MTCUE 3-1 It is determined that the access response message has not been successfully received.

If it is determined that the random access response message has not been successfully received and the notification of the power ramping suspension (power ramping suspension) is not received from the physical layer of the MTCUE 3-1, the preamble transmission counter is incremented by 1. The

When the value of the preamble transmission counter exceeds the maximum number of transmissions of the random access preamble of the set temporary PRACH repetition level (when (preambleTransMax_rl) +1), the temporary PRACH repetition level is the maximum repetition level. In the case of (RepetitionLevelMax), the MAC layer of MTCUE3-1 notifies the upper layer (for example, the RRC layer of MTCUE3-1) of the random access problem (RandomRAccess Problem).

When the value of the preamble transmission counter exceeds the maximum number of transmissions of the random access preamble of the set temporary PRACH repetition level (when (preambleTransMax_rl) +1), the temporary PRACH repetition level is the maximum repetition level. If it is not (RepetitionLevelMax), 1 is added to the temporary PRACH repetition level. That is, the temporary PRACH repetition level is raised by one step. The preamble transmission counter is set to 1. Then, the MAC layer of the MTCUE 3-1 performs a random access resource selection process again in order to retransmit the random access preamble.

When the value of the preamble transmission counter does not exceed the maximum number of transmissions of the random access preamble of the set repetition level (when (preambleTransMax_rl) +1), the MAC layer of the MTCUE 3-1 retransmits the random access preamble In order to do this, the selection process of the random access resource is performed again.

When the RRC layer of MTCUE3-1 is notified of the random access problem from the MAC layer of MTCUE3-1, it determines that the radio link has failed (radio radi link failure) and executes the connection 確立 re-establishment procedure. To do.

Assuming that the MTCUE 3-1 performs the random access preamble transmission process and the random access response reception process, the base station device 5 may perform the random access preamble reception process and the random access response transmission process. Good.

The base station apparatus 5 may detect the random access preamble transmitted from the MTCUE 3-1 by changing the number of times the random access preamble is repeatedly received according to the preamble number.

The base station apparatus 5 may calculate the uplink transmission timing of the MTCUE 3-1 from the received random access preamble after detecting the random access preamble.

When the base station apparatus 5 transmits a random access response message on the physical downlink shared channel PDSCH, the base station apparatus 5 receives the random access preamble PRACH subframe number (or frame number) and random access. RA-RNTI may be calculated based on the frequency information of channel PRACH.

The base station apparatus 5 transmits the transmission timing information including the transmission timing, the uplink transmission permission information (Uplink grant) for the MTCUE 3-1 to transmit the message 3, the preamble number of the received random access preamble, and the Temporary C-RNTI. Create a random access response message containing.

The base station apparatus 5 repeatedly transmits a random access response message using the physical downlink control channel PDCCH or the extended physical downlink control channel E-PDCCH including control information including RA-RNTI and the physical downlink shared channel PDSCH. Note that the number of repeated transmissions of the random access response message is set according to the received random access preamble.

Further, when the base station device 5 transmits a random access response message on the physical downlink control channel PDCCH, the base station device 5 receives the preamble number of the received random access preamble and the random access channel PRACH that has received the random access preamble. The RA-RNTI may be calculated based on the subframe number (or frame number) and the frequency information of the random access channel PRACH.

The base station apparatus 5 creates a random access response message including RA-RNTI, transmission timing information including transmission timing, and uplink transmission permission information (Uplink grant) for MTCUE3-1 to transmit the message 3.

The base station apparatus 5 repeatedly transmits a random access response message created by the physical downlink control channel PDCCH or the extended physical downlink control channel E-PDCCH. Note that the number of repeated transmissions of the random access response message is set according to the received random access preamble.

Information indicating whether the base station apparatus 5 transmits the random access response message using the physical downlink control channel PDCCH (or the extended physical downlink control channel E-PDCCH) or the physical downlink shared channel PDSCH. May be included in the system information. In addition, the above information may be included in information regarding reception of a random access response message in the random access common setting information.

Also, the base station apparatus 5 transmits a random access response message on the physical downlink control channel PDCCH according to the communication status such as the downlink communication status or the number of random access preamble transmissions from the MTCUE, or the physical downlink It may be determined whether to transmit using the shared channel PDSCH.

In the above case, the base station apparatus 5 transmits information indicating that the random access response message is transmitted on the physical downlink control channel PDCCH (or the extended physical downlink control channel E-PDCCH) and transmitted on the physical downlink shared channel PDSCH. May be included in the system information. Further, the system information includes information indicating whether the random access response message is transmitted on the physical downlink control channel PDCCH (or the extended physical downlink control channel E-PDCCH) or the physical downlink shared channel PDSCH. It does not have to be included.

The MAC layer of MTCUE3-1 is used when the RA-RNTI used when the random access response message is notified by the physical downlink shared channel PDSCH and when the random access response message is notified by the physical downlink control channel PDCCH. The calculated RA-RNTI is calculated, and the calculated RA-RNTI is notified to the physical layer of the MTCUE 3-1. The physical layer of the MTCUE 3-1 monitors two RA-RNTIs using the physical downlink control channel PDCCH or the enhanced physical downlink control channel E-PDCCH.

The MTCUE 3-1 and the base station apparatus 5 may create a Temporary C-RNTI based on the RA-RNTI. For example, the MTCUE 3-1 and the base station apparatus 5 may be created by combining some of the calculated RA-RATI bits and a part of the Temporary C-RNTI notified by the system information.

The base station apparatus 5 transmits the upper 8 bits of the Temporary C-RNTI to the MTCUE 3-1 as system information. The MTCUE 3-1 may calculate the Temporary C-RNTI (16 bits) from the received upper 8 bits of the Temporary C-RNTI and the lower 8 bits of the calculated RA-RNTI.

A part of the Temporary C-RNTI notified by the system information may be included in the information related to the random access response message reception of the random access common setting information.

Also, the base station apparatus 5 transmits the upper 8 bits of the Temporary C-RNTI to the MTCUE 3-1 with a random access response message. The MTCUE 3-1 may calculate the Temporary C-RNTI (16 bits) from the received upper 8 bits of the Temporary C-RNTI and the lower 8 bits of the calculated RA-RNTI.

Also, the base station apparatus 5 transmits the upper 8 bits of the Temporary C-RNTI to the MTCUE 3-1 as system information. The base station apparatus 5 transmits the lower 8 bits of the Temporary C-RNTI to the MTCUE 3-1 with a random access response message. The MTCUE 3-1 may calculate Temporary C-RNTI (16 bits) from the upper 8 bits of the received Temporary C-RNTI and the lower 8 bits of the Temporary C-RNTI.

The physical layer of the MTCUE 3-1 uses the Temporary C-RNTI and transmits the message 3 based on the uplink transmission permission information. Note that the number of repetitions of message 3 may be set to the number of repetitions corresponding to the temporary PRACH repetition level.

When the message 3 is transmitted, the MAC layer of the MTCUE 3-1 starts a contention resolution timer. The timer value of the contention resolution timer may be selected according to the temporary PRACH repetition level.

Note that the contention resolution timer may be started by the first transmission of the repeated transmission of the message 3. Alternatively, the contention resolution timer may be started at the last transmission of the repeated transmission of the message 3.

The MAC layer of the MTCUE 3-1 is notified of the reception of the physical downlink control channel PDCCH from the physical layer of the MTCUE 3-1, and the received physical downlink control channel PDCCH includes the Temporary C-RNTI and corresponds. The physical downlink shared channel PDSCH in which the contention resolution ID is scheduled, or the received physical downlink control channel PDCCH includes the C-RNTI for the own MTCUE 3-1, and the received physical downlink When uplink transmission permission information is included in the control channel PDCCH, it is determined that the contention resolution is successful, and the contention resolution timer is stopped.

When it is determined that the contention resolution is successful, the MAC layer of the MTCUE 3-1 regards the random access procedure as successful, and flushes the HARQ buffer of the message 3. Further, when the random access procedure is successful, the MAC layer of MTCUE 3-1 may use the temporary PRACH repetition level as the PRACH repetition level or the reference repetition level.

If the contention resolution timer expires before receiving the contention resolution, the MTCUE3-1 MAC layer determines that the contention resolution is not successful. If it is determined that contention resolution is not successful, the MAC layer of MTCUE 3-1 flushes the HARQ buffer of message 3.

And, 1 is added to the preamble transmission counter. When the value of the preamble transmission counter is the maximum number of transmissions ((preambleTransMax_rl) +1) of the random access preamble of the set temporary PRACH repetition level, the temporary PRACH repetition level is the maximum repetition level (RepetitionLevelMax). In this case, the MAC layer of the MTCUE 3-1 notifies the upper layer (RRC layer) of the random access problem.

When the value of the preamble transmission counter is the maximum number of random access preamble transmissions ((preambleTransMax_rl) +1) of the set temporary PRACH repetition level, the temporary PRACH repetition level is not the maximum repetition level (RepetitionLevelMax) In this case, 1 is added to the temporary PRACH repetition level. That is, the temporary PRACH repetition level is raised by one step. The preamble transmission counter is set to 1. Then, the MAC layer of the MTCUE 3-1 performs a random access resource selection process again in order to retransmit the random access preamble.

The base station apparatus 5 performs the message 3 reception process and the contention resolution transmission process on the assumption that the MTCUE 3-1 performs the message 3 transmission process and the contention reception process. .

The base station apparatus 5 receives the message 3 using the Temporary C-RNTI based on the uplink transmission permission information included in the random access response message.

In addition, when receiving the message 3, the base station apparatus 5 transmits contention resolution to the MTCUE 3-1 using the Temporary C-RNTI. That is, the base station apparatus 5 transmits the contention resolution scheduling information including the Temporary C-RNTI on the physical downlink control channel PDCCH, and transmits the contention contention resolution on the physical downlink shared channel PDSCH. To do.

The base station device 5 receives the message 3 repeatedly and transmits the contention resolution repeatedly. The base station apparatus 5 receives the message 3 and transmits the contention resolution at the repetition level of the repetition level corresponding to the random access preamble. .

Also, the base station apparatus 5 may notify the contention resolution message including the new C-RNTI of the MTCUE 3-1.

When the received contention resolution includes new C-RNTI information, the MTCUE3-1 MAC layer converts the C-RNTI information included in the contention resolution into the MTCUE3-1 C-RNTI information. Set as.

Then, the MTCUE 3-1 uses the set C-RNTI to receive the physical downlink control channel PDCCH after the random access procedure, receive the physical downlink shared channel PDSCH, transmit the physical uplink control channel PUCCH, and The physical uplink shared channel PUSCH is transmitted.

When the C-RNTI is not included in the contention resolution, the MAC layer of the MTCUE 3-1 sets the Temporary C-RNTI as the C-RNTI of the MTCUE 3-1.

Processing of the random access response message in the MAC layer of MTCUE3-1 will be specifically described with reference to FIG. A case where the MTCUE 3-1 receives a random access response message on the physical downlink shared channel PDSCH is shown below.

The MAC layer of MTCUE 3-1 determines whether or not a random access response message has been received within the random access response reception period (S101). When a random access response message is received within the random access response reception period (when S101 is Yes), the MAC layer of MTCUE3-1 includes a preamble number corresponding to the random access preamble transmitted in the random access response message. It is determined whether or not there is (S102).

When the preamble number is included in the random access response message (when S102 is Yes), the MAC layer of the MTCUE 3-1 determines that the random access response message has been successfully received (S103). The MAC layer of the MTCUE 3-1 processes transmission timing information (transmission timing command) included in the random access response message (S104).

Then, the MAC layer of the MTCUE 3-1 notifies the physical layer of the MTCUE 3-1 of uplink transmission permission information for message 3 transmission included in the random access response message (S105). The MAC layer of MTCUE3-1 sets Temporary C-RNTI included in the random access response message (S106). The MAC layer of MTCUE 3-1 performs data processing for message 3 transmission (S107).

When the random access response message is not received within the random access response reception period (when S101 is No), the MAC layer of the MTCUE 3-1 determines that the random access response message has not been successfully received (S108). That is, the MAC layer of MTCUE3-1 determines that reception of the random access response message has failed.

Then, the MAC layer of the MTCUE 3-1 confirms whether or not a power ramping suspension notification has been received from the physical layer of the MTCUE 3-1 (S109). When the notification of the power ramping suspension is not received from the physical layer of MTCUE3-1 (when S109 is No), the MAC layer of MTCUE3-1 adds 1 to the preamble transmission counter (S110).

The MAC layer of MTCUE 3-1 determines whether or not the value of the preamble transmission counter exceeds the maximum number of transmissions of the set random access preamble of the temporary PRACH repetition level (S111). When the notification of the power ramping suspension is not received from the physical layer of the MTCUE 3-1 (when S109 is Yes), the MAC layer of the MTCUE 3-1 performs the preamble transmission counter determination (S111). When the value of the preamble transmission counter does not exceed the maximum number of transmissions of the random access preamble of the set temporary PRACH repetition level (when S111 is No), the MAC layer of the MTCUE 3-1 An access resource selection process is performed (S116).

When the maximum number of transmissions of the random access preamble of the temporary PRACH repetition level at which the preamble transmission counter value is set (when S111 is Yes), the MAC layer of the MTCUE 3-1 has the maximum temporary PRACH repetition level. It is confirmed whether or not it is a repetition level (RepetitionLevelMax) (S112).

When the temporary PRACH repetition level is the maximum repetition level (when S112 is Yes), the MTCUE3-1 MAC layer notifies the upper layer of a random access problem (random access problem) (S113). Then, the MAC layer of MTCUE 3-1 performs the random access resource selection process described above (S116).

When the temporary PRACH repetition level is not the maximum repetition level (when S112 is No), the MTCUE3-1 MAC layer adds 1 to the temporary PRACH repetition level (S114). That is, the MAC layer of MTCUE3-1 raises the temporary PRACH repetition level by one level. Then, the MAC layer of MTCUE 3-1 sets the preamble transmission counter to 1 (S115). The MAC layer of MTCUE 3-1 performs the random access resource selection process described above (S116).

Processing of the random access response message in the MAC layer of MTCUE3-1 will be specifically described with reference to FIG. The case where MTCUE3-1 receives a random access response message on the physical downlink control channel PDCCH is shown below.

The MAC layer of MTCUE 3-1 determines whether or not a random access response message has been received within the random access response reception period (S201). When the random access response message is received within the random access response reception period (when S201 is Yes), the MAC layer of the MTCUE 3-1 determines that the random access response message has been successfully received (S202).

The MAC layer of MTCUE3-1 processes transmission timing information (transmission timing command) included in the random access response message (S203). The MAC layer of MTCUE 3-1 notifies the physical layer of MTCUE 3-1 of uplink transmission permission information for message 3 transmission included in the random access response message (S204).

The MAC layer of MTCUE3-1 sets RA-RNTI used for receiving the random access response message as Temporary C-RNTI (S205). The MAC layer of MTCUE 3-1 performs data processing for message 3 transmission (S206).

When the random access response message is not received within the random access response reception period (when S201 is No), the MAC layer of the MTCUE 3-1 determines that the random access response message has not been successfully received (S207). That is, the MAC layer of MTCUE3-1 determines that reception of the random access response message has failed.

Then, the MAC layer of the MTCUE 3-1 confirms whether or not the notification of the power ramping suspension has been received from the physical layer of the MTCUE 3-1 (S208). When the notification of the power ramping suspension is not received from the physical layer of MTCUE3-1 (when S208 is No), the MAC layer of MTCUE3-1 adds 1 to the preamble transmission counter (S209).

The MAC layer of MTCUE 3-1 determines whether or not the value of the preamble transmission counter has exceeded the maximum number of transmissions of the set random access preamble of the temporary PRACH repetition level (S210). When the notification of the power ramping suspension is not received from the physical layer of the MTCUE 3-1 (when S208 is Yes), the MAC layer of the MTCUE 3-1 determines the preamble transmission counter (S210). When the value of the preamble transmission counter does not exceed the set maximum number of transmissions of the random access preamble of the temporary PRACH repetition level (when S210 is No), the MAC layer of the MTCUE 3-1 An access resource selection process is performed (S215).

When the maximum number of transmissions of the random access preamble of the temporary PRACH repetition level for which the preamble transmission counter value is set (when S210 is Yes), the MAC layer of the MTCUE 3-1 has the maximum temporary PRACH repetition level. It is confirmed whether or not it is a repetition level (RepetitionLevelMax) (S211).

When the temporary PRACH repetition level is the maximum repetition level (when S211 is Yes), the MTCUE3-1 MAC layer notifies the upper layer of the random access problem (random 問題 access problem) (S212). Then, the MAC layer of the MTCUE 3-1 performs the random access resource selection process described above (S215).

When the temporary PRACH repetition level is not the maximum repetition level (when S211 is No), the MTCUE3-1 MAC layer adds 1 to the temporary PRACH repetition level (S213). That is, the MAC layer of MTCUE3-1 raises the temporary PRACH repetition level by one level. Then, the MAC layer of MTCUE 3-1 sets the preamble transmission counter to 1 (S214). The MAC layer of MTCUE 3-1 performs the random access resource selection process described above (S215).

In the above description, the random access response message is received using the physical downlink control channel PDCCH and the extended physical downlink control channel E-PDCCH. However, the physical downlink control channel for MTCUE (MTC Physical Downlink ： Control Channel: M-PDCCH) may be used.

In the above, MTCUE may be classified according to the type of mobile station apparatus. The mobile station apparatus is classified into two types, and the mobile station apparatus that performs the operation of the mobile station apparatus 1-1 is classified as the first type mobile station apparatus, and the mobile station apparatus that performs the operation of the MTCUE3-1. May be classified into the second type. Further, the mobile station apparatus is divided into two types, and the mobile station apparatus that operates the mobile station apparatus 1-1 is classified as the first type mobile station apparatus, and the mobile station apparatus that performs the operation of the MTCUE 3-1 described above. The mobile station apparatuses to which different repetition counts are set may be classified into the second type and the third type, respectively. Further, the first type mobile station apparatus is classified into categories 0 to 13 and the second type mobile station apparatus is a category X other than the category indicated by the first type mobile station apparatus. The third type mobile station apparatus may be classified into a category Y other than the categories indicated by the first type and second type mobile station apparatuses.

Further, the contents described using specific numerical values are merely examples of numerical values used for convenience of description, and any appropriate value may be used.

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

In the embodiment, the mobile station device corresponding to the machine type communication is described as an example of the terminal device or the communication device, but the present invention is not limited to this, and is a stationary type installed indoors or outdoors, or non- Needless to say, it can be applied to terminal devices or communication devices such as movable electronic devices such as AV equipment, kitchen equipment, cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, and other life equipment.

Further, for convenience of explanation, the MTCUE 3-1 and the base station apparatus 5 of the embodiment have been described using functional block diagrams, but the functions of each part of the MTCUE 3-1 and the base station apparatus 5 or a part of these functions are The mobile station apparatus and the base station apparatus may be controlled by recording a program for realizing on a computer-readable recording medium, causing the computer system to read and execute the program recorded on the recording medium. . The “computer system” here includes an OS and hardware such as peripheral devices.

Further, 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. Furthermore, 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. .

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

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the design and the like within the scope of the present invention are also within the scope of the claims. include. In other words, the description in the present specification is for illustrative purposes and does not limit the embodiment of the present invention.

(Summary)
(1) A radio communication system according to an aspect of the present invention is a radio communication system in which a base station apparatus and a terminal apparatus execute a random access procedure, and the terminal apparatus transmits a random access response message to a physical downlink control channel. The random access identification information used to receive the random access response message is set as temporary terminal device identification information, and the base station device transmits the random access response message on the physical downlink control channel. In this case, the random access identification information used for transmission of the random access response message is set as the temporary terminal device identification information.

(2) Further, in the radio communication system according to one aspect of the present invention, the terminal device uses the temporary terminal device identification information to transmit the message 3 and receive the contention resolution message, and the base station device However, the temporary terminal device identification information is used for receiving the message 3 and transmitting the contention resolution message.

(3) A radio communication system according to an aspect of the present invention is a radio communication system in which a base station apparatus and a terminal apparatus execute a random access procedure, and the base station apparatus includes system information and / or random access. A part of temporary terminal device identification information is notified by a response message, and the terminal device receives the system information and the random access response message, and is included in the information included in the system information and the random access response message. The temporary terminal device identification information is generated from at least two of information and random access identification information used for receiving the random access response message.

(4) A terminal apparatus according to an aspect of the present invention is a terminal apparatus that communicates with a base station apparatus and executes a random access procedure, and when a random access response message is received on a physical downlink control channel, The random access identification information used for receiving the random access response message is set as temporary terminal device identification information.

(5) Further, the terminal device according to an aspect of the present invention is characterized in that the temporary terminal device identification information is used for transmitting the message 3 and receiving the contention resolution message.

(6) A terminal apparatus according to an aspect of the present invention is a terminal apparatus that communicates with a base station apparatus and executes a random access procedure, receives system information and a random access response message, and is included in the system information Tentative terminal device identification information is generated from at least two of the received information, the information included in the random access response message, and the random access identification information used for receiving the random access response message.

(7) A base station apparatus according to an aspect of the present invention is a base station apparatus that communicates with a terminal apparatus and executes a random access procedure, and transmits a random access response message on a physical downlink control channel. Random access identification information used for transmission of the random access response message is set as temporary terminal device identification information.

(8) Further, the base station apparatus according to an aspect of the present invention is characterized in that the temporary terminal apparatus identification information is used for receiving the message 3 and transmitting the contention resolution message.

(9) A base station apparatus according to an aspect of the present invention is a base station apparatus that communicates with a terminal apparatus and executes a random access procedure, and is a temporary terminal using system information and / or a random access response message. A part of the device identification information is notified, and the temporary information is obtained from at least two of the information included in the system information, the information included in the random access response message, and the random access identification information used for transmitting the random access response message. The terminal device identification information is generated.

(10) A radio communication method according to an aspect of the present invention is a radio communication method in which a base station apparatus and a terminal apparatus execute a random access procedure, and the terminal apparatus transmits a random access response message to a physical downlink control channel. When receiving the random access response message, the base station device sets the random access response message as the temporary terminal device identification information, and the base station device transmits the random access response message to the physical downlink control channel. In the case of transmitting by using the random access response message, the random access identification information used for transmitting the random access response message is set as the temporary terminal device identification information.

(11) A radio communication method according to an aspect of the present invention is a radio communication method in which a base station device and a terminal device execute a random access procedure, and the base station device has system information and / or random access. A step of notifying a part of the provisional terminal device identification information in a response message, the terminal device receiving the system information and the random access response message, information included in the system information, and the random access response The method includes generating the temporary terminal device identification information from at least two of information included in the message and random access identification information used for receiving the random access response message.

(12) An integrated circuit according to an aspect of the present invention is an integrated circuit applied to a terminal device that performs communication with a base station device and executes a random access procedure, and transmits a random access response message to a physical downlink control channel. And receiving the random access response message, the random access identification information used for receiving the random access response message is set as temporary terminal device identification information.

(13) An integrated circuit according to an aspect of the present invention is an integrated circuit that is applied to a terminal device that communicates with a base station device and executes a random access procedure, and receives system information and a random access response message. A circuit for generating temporary terminal device identification information from at least two of information included in the system information, information included in the random access response message, and random access identification information used to receive the random access response message It is characterized by having.

(14) An integrated circuit according to an aspect of the present invention is an integrated circuit that is applied to a base station apparatus that communicates with a terminal device and executes a random access procedure, and transmits a random access response message to a physical downlink control channel. In the case of transmitting with the random access response message, the random access identification information used for transmitting the random access response message is provided as a temporary terminal device identification information.

(15) An integrated circuit according to an aspect of the present invention is an integrated circuit that is applied to a base station apparatus that communicates with a terminal device and executes a random access procedure, and includes system information and / or a random access response. A circuit for notifying a part of provisional terminal device identification information in a message, information included in the system information, information included in the random access response message, and random access identification information used for transmission of the random access response message. It has a circuit which generates the temporary terminal device identification information from at least two.

(Cross-reference of related applications)
This application claims the benefit of priority to the Japanese patent application filed on Aug. 06, 2015: Japanese Patent Application No. 2015-155576. Included in this document.

1-1 to 1-3 Mobile station apparatus 3-1 to 3-3 MTCUE
5

Base station apparatus

101, 201

Data generation unit

103, 203 Transmission

data storage unit

105, 205 Transmission

HARQ processing unit

107, 207

Transmission processing unit

109, 209

Radio unit

111, 211

Reception processing unit

113, 213 Reception

HARQ processing unit

115, 215 MAC

information extraction unit

117, 217

PHY control unit

119, 219

MAC control unit

121, 221

Data processing unit

123, 223 RRC control unit

Claims

A wireless communication system in which a base station device and a terminal device execute a random access procedure,
The terminal device
When a random access response message is received on the physical downlink control channel,
Random access identification information used for receiving the random access response message is set as temporary terminal device identification information,
The base station device
When transmitting the random access response message on the physical downlink control channel,
A wireless communication system in which the random access identification information used for transmitting the random access response message is set as the temporary terminal device identification information.
The wireless communication system according to claim 1,
The terminal device uses the temporary terminal device identification information to transmit the message 3 and receive the contention resolution message,
The base station device
A wireless communication system that uses the temporary terminal device identification information for receiving the message 3 and transmitting the contention resolution message.
A wireless communication system in which a base station device and a terminal device execute a random access procedure,
The base station device
Notifying a part of temporary terminal device identification information with system information and / or random access response message,
The terminal device
Receiving the system information and the random access response message;
Wireless communication system for generating temporary terminal device identification information from at least two of information included in system information, information included in random access response message, and random access identification information used for receiving random access response message .
A terminal device that communicates with a base station device and executes a random access procedure,
When a random access response message is received on the physical downlink control channel,
A terminal device that sets the random access identification information used to receive the random access response message as temporary terminal device identification information.
The terminal device according to claim 4,
A terminal device that uses the provisional terminal device identification information for transmitting the message 3 and receiving the contention resolution message.
A terminal device that communicates with a base station device and executes a random access procedure,
Receive system information and random access response message,
A terminal device that generates temporary terminal device identification information from at least two of information included in the system information, information included in the random access response message, and random access identification information used for receiving the random access response message.
A base station device that communicates with a terminal device and executes a random access procedure,
When transmitting a random access response message on the physical downlink control channel,
A base station apparatus that sets random access identification information used for transmission of the random access response message as temporary terminal apparatus identification information.
The base station apparatus according to claim 7, wherein
A wireless communication system using the temporary terminal device identification information for receiving a message 3 and transmitting a contention resolution message.
A base station device that communicates with a terminal device and executes a random access procedure,
Notifying a part of temporary terminal device identification information with system information and / or random access response message,
A base station device that generates the temporary terminal device identification information from at least two of information included in the system information, information included in the random access response message, and random access identification information used for transmission of the random access response message .
A wireless communication method in which a base station device and a terminal device execute a random access procedure,
The terminal device
When a random access response message is received on the physical downlink control channel,
Setting random access identification information used for receiving the random access response message as temporary terminal device identification information;
The base station device
When transmitting the random access response message on the physical downlink control channel,
A wireless communication method including a step of setting the random access identification information used for transmission of the random access response message as the temporary terminal device identification information.
A wireless communication method in which a base station device and a terminal device execute a random access procedure,
The base station device
Notifying a part of temporary terminal device identification information with system information and / or a random access response message;
The terminal device
Receiving the system information and the random access response message;
Generating the temporary terminal device identification information from at least two of information included in the system information, information included in the random access response message, and random access identification information used for receiving the random access response message. Wireless communication method.
An integrated circuit applied to a terminal device that communicates with a base station device and executes a random access procedure,
When a random access response message is received on the physical downlink control channel,
An integrated circuit having a circuit for setting random access identification information used for receiving the random access response message as temporary terminal device identification information.
An integrated circuit applied to a terminal device that communicates with a base station device and executes a random access procedure,
A circuit for receiving system information and a random access response message;
Integrated with a circuit for generating temporary terminal device identification information from at least two of information included in the system information, information included in the random access response message, and random access identification information used for receiving the random access response message circuit.
An integrated circuit applied to a base station device that communicates with a terminal device and executes a random access procedure,
When transmitting a random access response message on the physical downlink control channel,
An integrated circuit having a circuit for setting random access identification information used for transmission of the random access response message as temporary terminal device identification information.
An integrated circuit applied to a base station device that communicates with a terminal device and executes a random access procedure,
A circuit for notifying a part of the temporary terminal device identification information by system information and / or a random access response message;
A circuit that generates the temporary terminal device identification information from at least two of information included in the system information, information included in the random access response message, and random access identification information used for transmission of the random access response message Integrated circuit.