WO2010103895A1 - 移動局装置、基地局装置、集積回路、およびランダムアクセス問題の検出方法 - Google Patents

移動局装置、基地局装置、集積回路、およびランダムアクセス問題の検出方法 Download PDF

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Publication number
WO2010103895A1
WO2010103895A1 PCT/JP2010/052325 JP2010052325W WO2010103895A1 WO 2010103895 A1 WO2010103895 A1 WO 2010103895A1 JP 2010052325 W JP2010052325 W JP 2010052325W WO 2010103895 A1 WO2010103895 A1 WO 2010103895A1
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WIPO (PCT)
Prior art keywords
random access
station apparatus
transmissions
mobile station
access channel
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PCT/JP2010/052325
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English (en)
French (fr)
Japanese (ja)
Inventor
渉 大内
山田　昇平
恭之 加藤
中嶋　大一郎
克成 上村
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Sharp Corp
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Sharp Corp
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Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to EA201101320A priority Critical patent/EA022510B1/ru
Priority to BRPI1008954-3A priority patent/BRPI1008954B1/pt
Priority to EP10750650.3A priority patent/EP2408254B1/en
Priority to JP2011503752A priority patent/JP4914965B2/ja
Priority to AU2010222296A priority patent/AU2010222296B2/en
Priority to US13/255,968 priority patent/US20120002555A1/en
Priority to CN201080011024.7A priority patent/CN102349349B/zh
Publication of WO2010103895A1 publication Critical patent/WO2010103895A1/ja
Anticipated expiration legal-status Critical
Priority to US15/064,473 priority patent/US10015823B2/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2101/00—Indexing scheme associated with group H04L61/00
    • H04L2101/60—Types of network addresses
    • H04L2101/618—Details of network addresses
    • H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present invention relates to a mobile station apparatus in a mobile communication system, and more particularly to a method for detecting a random access problem for a plurality of component carriers.
  • EUTRA Universal Terrestrial Radio Access
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • EUTRA has proposed a medium access control layer process related to random access (Non-Patent Document 1).
  • Carrier aggregation is a method of preparing a transmission device and a reception device having a reception bandwidth that exceeds the transmission bandwidth of the transmission device in downlink communication, and each having a plurality of different frequency bands (hereinafter referred to as component carrier (CC Is called “Component Carrier”), and data is transmitted from the plurality of transmission devices, and the reception device receives the data transmitted from the plurality of transmission devices, thereby improving the data rate.
  • component carrier CC Is called “Component Carrier”
  • a reception device and a transmission device having a transmission bandwidth that exceeds the reception bandwidth of the reception device are prepared, and a plurality of reception devices each having a different frequency band are set from the transmission device. This is a technique for improving the data rate by receiving transmitted data.
  • a mobile station apparatus transmits signals using a plurality of component carriers, it is necessary to appropriately detect a random access problem and appropriately perform processing related to communication connection.
  • the mobile station device When the mobile station device transmits a random access channel using a plurality of component carriers, the mobile station device waits for the random access procedure of all component carriers to be completed, detects a random access problem, When connection processing is performed, time until uplink data transmission is wasted. In order to prevent such wasteful processing, a means is required for the mobile station apparatus to detect the random access problem at an early stage and to perform the reconnection process at an early stage.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to detect a random access problem in a plurality of component carriers by using one random access channel transmission counter (for measuring the number of transmissions of a random access channel). It is an object of the present invention to provide a mobile station device, a base station device, an integrated circuit, and a method for detecting a random access problem, which can be performed using a counter of
  • the mobile station apparatus is characterized by managing a random access procedure using a counter for a plurality of component carriers.
  • the 1st technical means in 1 aspect of this invention is a random access problem of the mobile station apparatus which communicates using the some component carrier which is a frequency band which can be used between base station apparatuses.
  • the mobile station apparatus assigns a counter for measuring the number of transmissions of one random access channel to the plurality of component carriers, and transmits the random access channel to the base station apparatus.
  • the second technical means in one aspect of the present invention is a random access problem of a mobile station apparatus that performs communication using a plurality of component carriers that are frequency bands usable with the base station apparatus.
  • the mobile station apparatus selects any one of the plurality of component carriers, and a counter for measuring the number of transmissions of one random access channel for the selected component carrier.
  • the process of assigning A step of transmitting a random access channel to the base station device, a step of measuring the number of transmissions of the random access channel transmitted by the counter using the selected component carrier, and the number of transmissions of a predetermined maximum transmission.
  • the process of transmitting uses only the selected component carrier to transmit the random access channel to the base station. It transmits to an apparatus, It is characterized by the above-mentioned.
  • the 4th technical means in 1 aspect of this invention is a random access problem of the mobile station apparatus which communicates using the some component carrier which is a frequency band which can be used between base station apparatuses.
  • the mobile station apparatus allocates a counter for measuring the number of transmissions of one random access channel to a master component carrier instructed by the base station apparatus, and the base station apparatus A process of transmitting a random access channel, a process of measuring the number of transmissions of the random access channel transmitted by the counter using the master component carrier, and a case where the number of transmissions reaches a predetermined maximum number of transmissions And recognizing that a random access problem has been detected. And butterflies.
  • a fifth technical means in one aspect of the present invention is the fourth technical means, wherein the master component carrier is paired with a downlink component carrier that is first accessed by the mobile station apparatus. It is characterized by being an uplink component carrier.
  • the master component carrier is instructed by broadcast information transmitted from the base station apparatus. It is an uplink component carrier paired with the downlink component carrier having the highest degree.
  • the seventh technical means in one aspect of the present invention is a random access problem of a mobile station apparatus that performs communication using a plurality of component carriers that are frequency bands usable with the base station apparatus.
  • the mobile station apparatus allocates one random access channel transmission count counter to each of the plurality of component carriers, and transmits the random access channel to the base station apparatus.
  • the process of recognizing that a random access problem has been detected Characterized in that it has at least a.
  • the 8th technical means in 1 aspect of this invention is a random access problem of the mobile station apparatus which communicates using the some component carrier which is a frequency band which can be used between base station apparatuses.
  • the mobile station apparatus forms a plurality of component carrier groups from the plurality of component carriers according to information forming a component carrier group transmitted from the base station apparatus, and A process of assigning a counter for measuring the number of times of transmission of a random access channel to each of a plurality of component / carrier groups, a process of transmitting a random access channel to the base station apparatus, and the counter transmitting a random access channel
  • random access problem is characterized by having at least the steps for recognizing a detected, the.
  • the ninth technical means in one aspect of the present invention is a random access problem of a mobile station apparatus that performs communication using a plurality of component carriers that are frequency bands usable with the base station apparatus.
  • the mobile station apparatus transmits a random access channel to the base station apparatus, and detects a random access problem when the number of transmissions of the random access channel reaches a predetermined maximum number of transmissions. And a step of recognizing that a random access problem has been detected when the timer reaches a predetermined time.
  • a mobile station apparatus that performs communication with a base station apparatus using a plurality of component carriers.
  • a counter for measuring the number of transmissions of one random access channel is assigned to the base station apparatus, and the random access channel is transmitted to the base station apparatus.
  • the counter is used to transmit the random access channel transmitted using the plurality of component carriers.
  • the number of transmissions is measured, and when the number of transmissions reaches a predetermined maximum number of transmissions, it is recognized that a random access problem has been detected.
  • an eleventh technical means in one aspect of the present invention is a mobile station apparatus that performs communication with a base station apparatus using a plurality of component carriers, wherein the plurality of component carriers One of them is selected, and a counter for measuring the number of transmissions of one random access channel is assigned to the selected component carrier, A random access channel is transmitted to the base station apparatus, and the counter measures the number of transmissions of the random access channel transmitted using the selected component carrier, and the number of transmissions reaches a predetermined maximum number of transmissions. In this case, it is recognized that a random access problem has been detected.
  • the mobile station apparatus transmits a random access channel using only the selected component carrier.
  • a thirteenth technical means is a mobile station apparatus that performs communication with a base station apparatus using a plurality of component carriers, wherein the plurality of component carriers Among them, a counter for measuring the number of transmissions of one random access channel is assigned to the master component carrier instructed from the base station apparatus, and the random access channel is transmitted to the base station apparatus. Measuring the number of transmissions of a random access channel transmitted using a master component carrier, and recognizing that a random access problem is detected when the number of transmissions reaches a predetermined maximum number of transmissions. To do.
  • the master component carrier is paired with a downlink component carrier that is first accessed by the mobile station apparatus. It is characterized by being an uplink component carrier.
  • the master component carrier is a priority indicated by broadcast information transmitted from the base station apparatus. It is an uplink component carrier paired with the highest downlink component carrier.
  • a mobile station apparatus that performs communication with a base station apparatus using a plurality of component carriers, each of the plurality of component carriers.
  • a counter for measuring the number of times of transmission of a random access channel is assigned to each of the base station apparatuses, and the random access channel is transmitted to the base station apparatus.
  • the counter is a random access channel transmitted using the component carrier. The number of transmissions is measured for each component carrier, and when all the number of transmissions reaches a predetermined maximum number of transmissions, it is recognized that a random access problem has been detected.
  • the seventeenth technical means in one aspect of the present invention is a mobile station apparatus that communicates with a base station apparatus using a plurality of component carriers, and is transmitted from the base station apparatus.
  • a plurality of component carrier groups are formed from the plurality of component carriers, and a counter for measuring the number of transmissions of a random access channel is set for each of the plurality of component carrier groups.
  • the counter measures the number of transmissions of the random access channel transmitted from the component / carrier group for each component / carrier group, and the number of transmissions Are all prescribed If it reaches the maximum number of transmissions, random access problem and recognizes the detected.
  • a mobile station apparatus that communicates with a base station apparatus using a plurality of component carriers, the random access to the base station apparatus Transmit a channel, measure the number of transmissions of the random access channel, and start a timer for detecting a random access problem when the number of transmissions reaches a predetermined maximum number of transmissions, and the timer reaches a predetermined expiration time. If it reaches, it is recognized that a random access problem has been detected.
  • a base station apparatus that communicates with a mobile station apparatus using a plurality of component carriers.
  • a carrier group is formed, and a signal including information indicating the formation is transmitted to the mobile station apparatus.
  • a twentieth technical means is an integrated circuit which is mounted on a mobile station device to cause the mobile station device to perform a plurality of functions, and includes a plurality of component carriers.
  • a function of assigning a counter for measuring the number of transmissions of one random access channel to the base station, a function of transmitting a random access channel to the base station apparatus, and the counter is transmitted using the plurality of component carriers.
  • a twenty-first technical means in one aspect of the present invention is an integrated circuit that is mounted on a mobile station device to cause the mobile station device to perform a plurality of functions, and includes a plurality of component carriers.
  • the counter measures the number of transmissions of a random access channel transmitted using the selected component carrier, and a random access problem is detected when the number of transmissions reaches a predetermined maximum number of transmissions.
  • the mobile station apparatus transmits a random access channel using only the selected component carrier in the twenty-first technical means.
  • an integrated circuit which is mounted on a mobile station device and causes the mobile station device to perform a plurality of functions, and is instructed from a base station device.
  • a function of assigning a counter for measuring the number of transmissions of one random access channel to the master component carrier, a function of transmitting a random access channel to the base station apparatus, and the counter A function of measuring the number of transmissions of a random access channel transmitted using a carrier, and a function of recognizing that a random access problem has been detected when the number of transmissions reaches a predetermined maximum number of transmissions. It is characterized by having a station device exhibit.
  • an integrated circuit which is mounted on a mobile station device to cause the mobile station device to perform a plurality of functions, and includes a plurality of component carriers.
  • an integrated circuit which is mounted on a mobile station device to cause the mobile station device to exhibit a plurality of functions, and includes a plurality of component carriers.
  • a function of allocating a counter for measuring the number of transmission times of a random access channel to each of a plurality of component / carrier groups configured by: a function of transmitting a random access channel to the base station device; and the counter,
  • a function for measuring the number of transmissions of a random access channel transmitted from the component / carrier group for each component / carrier group, and a random access problem is detected when the number of transmissions reaches a predetermined maximum number of transmissions.
  • a twenty-sixth technical means in one aspect of the present invention is an integrated circuit which is mounted on a mobile station device and causes the mobile station device to exhibit a plurality of functions, and is randomly transmitted to the base station device.
  • a function of transmitting an access channel a function of measuring the number of transmissions of the random access channel, a function of starting a timer for detecting a random access problem when the number of transmissions reaches a predetermined maximum number of transmissions, When the timer reaches a predetermined time, the mobile station apparatus has a function of recognizing that a random access problem has been detected.
  • a twenty-seventh technical means in one aspect of the present invention is an integrated circuit which is mounted on a base station device and thereby exhibits a plurality of functions in the base station device,
  • the base station apparatus exhibits a function of forming a plurality of component / carrier groups from a carrier and a function of transmitting a signal including information indicating the formation to the mobile station apparatus.
  • the present invention it is possible to provide a method for detecting a random access problem that occurs when a mobile station apparatus performs a random access procedure using a plurality of different component carriers, and reconnection processing can be performed efficiently.
  • a random access problem detection method can be provided in a random access procedure by a plurality of component carriers.
  • ⁇ Reconnection processing can be provided when a random access problem occurs in a random access procedure with multiple component carriers.
  • Each layer of the radio interface protocol between the mobile station apparatus and the network is based on a reference model of open system interconnection (hereinafter referred to as OSI) L1 (first layer). ), L2 (second layer), and L3 (third layer).
  • OSI open system interconnection
  • the physical layer belonging to the first layer provides an information transmission service to an upper layer using a physical channel. Further, it is connected to a second layer medium access control (Medium Access Control, hereinafter referred to as MAC) layer through a transport channel (also called a transmission channel). Data is transferred between the MAC layer and the physical layer through the transport channel.
  • Medium Access Control hereinafter referred to as MAC
  • the MAC layer belonging to the second layer provides services such as resource allocation between the logical channel and the transport channel to the radio link control (Radio Link Control, hereinafter referred to as RLC) layer through the logical channel.
  • RLC Radio Link Control
  • the RLC layer supports reliable data transmission. Since the function of the RLC layer may be implemented by a functional block in the MAC layer, the RLC layer may not exist.
  • the second layer includes a packet data convergence protocol (hereinafter referred to as PDCP) layer in addition to the MAC layer and the RLC layer.
  • PDCP packet data convergence protocol
  • the PDCP layer compresses the header information added to the packet data so that it can be transmitted efficiently over the wireless link, or performs packet order management to prevent data loss.
  • the radio resource control (Radio Resource Control, hereinafter referred to as RRC) layer belonging to the third layer controls the transport channel and the physical channel in connection with the setting, reconfiguration, and release of the radio bearer.
  • the RRC layer notifies the mobile station apparatus of system information and call information from the network, and also controls the first layer and the second layer necessary for them. It also controls radio resources between the mobile station device and the network.
  • the physical channel used in the present invention includes physical broadcast channel, physical uplink data channel, physical downlink data channel, physical downlink control channel, physical uplink control channel, physical random access channel, downlink A link reference signal, an uplink reference signal, and the like are included. It should be noted that even if different types of physical channels are added to the physical channel, they can be applied to each embodiment of the present invention described later.
  • the physical broadcast channel (PBCH: Physical Broadcast Channel) is transmitted for the purpose of notifying control parameters (broadcast information) that are commonly used by mobile station apparatuses in the cell.
  • the broadcast information that is not notified on the physical broadcast channel is transmitted using the physical downlink shared channel with the resource notified on the physical downlink control channel.
  • a cell global ID indicating an individual ID (Identity) of the cell is notified.
  • a broadcast channel (BCH: Broadcast Channel) is mapped at intervals of 40 milliseconds. The timing of 40 milliseconds is blind-detected in the mobile station apparatus. That is, no explicit signaling is transmitted to the mobile station apparatus for timing presentation of the physical broadcast channel.
  • a subframe including a physical broadcast channel (PBCH) can be decoded only by the subframe (self-decodable).
  • the physical channel according to each embodiment of the present invention is mainly a random access channel, detailed description of other physical channels is omitted or simplified.
  • a physical downlink control channel (PDCCH: Physical Downlink Control Channel) is a downlink channel transmitted from a base station apparatus to a mobile station apparatus, and is commonly used for a plurality of mobile station apparatuses.
  • the base station apparatus uses a downlink control channel for transmission of transmission timing information and scheduling information (uplink / downlink resource allocation information).
  • a physical downlink data channel (PDSCH: Physical Downlink Shared Channel) is a channel used to transmit downlink data or paging information.
  • a downlink reference signal (DL-RS: Downlink Reference Signal or Cell-specific Reference Signal) is transmitted from the base station apparatus to the mobile station apparatus using the downlink channel.
  • the mobile station apparatus determines downlink reception quality by measuring a downlink reference signal.
  • the reception quality is reported to the base station apparatus using a physical uplink control channel (PUCCH) as a quality information indicator CQI (Channel Quality Indicator).
  • the base station apparatus performs downlink communication scheduling for the mobile station apparatus based on the CQI notified from the mobile station apparatus.
  • the reception quality includes SIR (Signal-to-Interference Ratio), SINR (Signal-to-Interference plus Noise Ratio), SNR (Signal-to-Noise Ratio). : Signal-to-noise power ratio), CIR (Carrier-to-Interference Ratio), BLER (Block Error Rate), path loss, etc. can be used.
  • the physical uplink data channel is a channel used mainly for transmitting uplink data (UL-SCH: Uplink Shared Channel).
  • UL-SCH Uplink Shared Channel
  • channel state information downlink channel quality index CQI, precoding matrix index (PMI: Precoding Matrix Indicator), rank index (RI: Rank Indicator)
  • ACK Acknowledgement
  • NACK Negative Acknowledgment
  • HARQ Hybrid Automatic Request
  • uplink data indicates transmission of user data, for example, and UL-SCH is a transport channel.
  • UL-SCH HARQ and dynamic adaptive radio link control are supported, and beamforming can be used.
  • UL-SCH supports dynamic resource allocation and quasi-static resource allocation.
  • a physical uplink control channel (PUCCH: Physical Uplink Control Channel) is a channel used to transmit control data.
  • the control data is, for example, channel state information (CQI, PMI, RI) transmitted (feedback) from the mobile station apparatus to the base station apparatus, and resource allocation for the mobile station apparatus to transmit uplink data.
  • Scheduling request (SR: Scheduling Request) for requesting transmission (UL-SCH), HARQ ACK / NACK for downlink transmission, and the like.
  • the uplink reference signal (UL-RS: Uplink Reference Signal) is transmitted from the mobile station apparatus to the base station apparatus using the uplink channel.
  • the base station apparatus determines the reception quality of the uplink radio transmission signal of the mobile station apparatus by measuring the uplink reference signal.
  • the base station apparatus performs uplink communication scheduling based on the reception quality.
  • the uplink reference signal is also used as a reference signal for calculating the amplitude, phase, and frequency fluctuation amount of the uplink data channel and demodulating a signal transmitted using the uplink data channel.
  • the physical random access channel (PRACH: Physical Random Access Channel) is a physical channel used for transmitting a random access preamble and has a guard time.
  • the PRACH is mainly used for the mobile station apparatus to synchronize with the base station apparatus, and is used for initial access, handover, reconnection request, and scheduling request.
  • Random Access Channel Random Access Channel
  • the physical random access channel uses code frame sequences that are orthogonal to each other. By transmitting this orthogonal code sequence, even if the uplink transmission timing is the same, if the orthogonal code sequence is different, the base station apparatus Wireless signals can be separated.
  • the orthogonal code sequence is called a signature and is used by the base station apparatus to identify the mobile station apparatus.
  • a signal composed of a signature is called a random access preamble.
  • the random access preamble includes a signal pattern representing information, and several bits of information can be expressed by preparing several tens of types of random access preambles. At present, it is assumed that 6-bit information is transmitted, and it is assumed that 64 types of random access preambles are prepared.
  • the 64 types of random access preambles are classified into two groups (for example, preamble groups A and B) based on broadcast information specified by the base station apparatus, and the mobile station apparatus is based on downlink path loss and message size. , Which group of random access preambles to select is determined. However, the number of random access preambles assigned to a group can be freely set.
  • FIG. 3 is a diagram showing a schematic configuration of the uplink channel.
  • the horizontal axis is time, and the vertical axis is frequency.
  • 14 symbols are arranged in the time axis direction. Seven symbols correspond to one slot, and the length of one slot is 0.5 milliseconds (ms). Further, 14 symbols (corresponding to 2 slots) correspond to 1 subframe, and the length of 1 subframe is 1 millisecond.
  • One resource block is composed of 12 subcarriers and 7 symbols.
  • PUSCH is allocated to at least one mobile station apparatus using two resource blocks (Resource Block).
  • PRACH uses 6 resource blocks as one physical random access channel, prepares a plurality of PRACHs, and supports access from a large number of mobile station apparatuses.
  • PUCCHs are arranged at both the bottom (the band with the lowest frequency) and the top (the band with the highest frequency) in each bandwidth portion.
  • PUSCH is arrange
  • PRACH is arrange
  • the PRACH has an access method of contention based random access (Contention based Random Access) and non-contention based random access (Non-contention based Random Access).
  • Contention-based random access is random access that may collide between mobile station apparatuses, and is a random access method that is normally performed.
  • non-contention based random access is random access in which no collision occurs between mobile station devices, and in a special case such as handover in order to quickly synchronize the uplink between the mobile station device and the base station device,
  • the base station apparatus takes the lead. When the base station apparatus cannot cause the mobile station apparatus to execute non-contention based random access, the base station apparatus may cause the mobile station apparatus to execute contention based random access.
  • FIG. 4 is a diagram showing an example of a contention based random access procedure.
  • the mobile station apparatus selects a random access preamble from a random ID, downlink path loss information, and the like, and transmits the random access preamble using PRACH (message 1 (Msg1) (L101)).
  • PRACH messages 1 (Msg1) (L101)
  • the base station apparatus calculates a synchronization timing shift between the mobile station and the base station from the random access preamble, performs scheduling for transmitting the L2 / L3 message, RA- indicating that a wireless network temporary identifier (Temporary Cell-Radio Network Temporary Identity, hereinafter referred to as Temporary C-RNTI) is allocated and a response addressed to a mobile station apparatus that has transmitted a random access preamble to the PDSCH for the PDCCH is included.
  • Temporary C-RNTI Temporary Cell-Radio Network Temporary Identity
  • RNTI Random Access-Radio Network Temporary Identity
  • Timing synchronization timing shift information
  • the mobile station apparatus When the mobile station apparatus confirms that the RA-RNTI is present in the PDCCH, the mobile station apparatus confirms the contents of the random access response arranged in the PDSCH, and extracts a response including the transmitted random access preamble number (or random ID). Acquire synchronization timing shift information to correct uplink transmission timing, and at least C-RNTI (or contention resolution ID (random value for initial access or s-TMSI (System Architecture Evolution) with scheduled radio resources -Send L2 / L3 message including UEID (mobile station device ID)) such as Temporary Mobile Subscriber Identity) (Message 3 (Msg3) (L10 )).
  • C-RNTI or contention resolution ID (random value for initial access or s-TMSI (System Architecture Evolution) with scheduled radio resources -Send L2 / L3 message including UEID (mobile station device ID)
  • UEID mobile station device ID
  • Msg3 Temporary Mobile Subscriber Identity
  • the base station apparatus When the base station apparatus receives the L2 / L3 message from the mobile station apparatus, a collision occurs between the mobile station apparatuses using the C-RNTI (or Temporary C-RNTI) included in the received L2 / L3 message.
  • a contention resolution for determining whether or not there is a message is transmitted to the mobile station apparatus (message 4 (Msg4) (L104)).
  • Msg4 messages 4
  • the mobile station apparatus transmits a contention resolution ID in message 3 (when message 3 is a common control channel (CCCH)
  • CCCH common control channel
  • the mobile station apparatus determines whether or not the random access process is successful by detecting the C-RNTI on the PDCCH from the base station apparatus.
  • contention resolution includes mobile station apparatus ID (C-RNTI or contention resolution ID) included in message 3 (L2 / L3 message) and transmitted to the base station apparatus.
  • message 4 (contention resolution) is transmitted to the mobile station apparatus.
  • the base station apparatus transmits the response to the message 3 including the mobile station apparatus ID transmitted from the mobile station apparatus.
  • the mobile station apparatus can confirm that it can access the base station apparatus by confirming its own ID from the message 4.
  • the mobile station apparatus receives message 2 or contention resolution fails, it restarts from message 1.
  • the mobile station apparatus randomly selects a random access preamble or incorporates a random access preamble assigned by the network into a signal and transmits the signal to the base station apparatus. .
  • the base station apparatus cannot be identified because the transmitted RACH signal collided with another mobile station apparatus or the transmission power is too low, or the random access process is caused by a randomly selected random access preamble. If the mobile station apparatus fails to compete for the line, or if the response to the RACH (L102 and L104 in FIG. 4) is not returned from the base station apparatus within a predetermined time, the mobile station apparatus transmits the RACH again.
  • the mobile station apparatus measures the number of RACH transmissions using a random access channel transmission counter.
  • the MAC layer in the mobile station apparatus considers that a random access problem has been detected and notifies the RRC layer.
  • RLF radio link failure
  • the RRC layer assumes that a radio link failure (hereinafter referred to as RLF) has occurred, and performs reconnection processing such as RACH parameter change and radio resource release.
  • RLF radio link failure
  • the mobile station apparatus temporarily stops RACH transmission, and the lower layer sets new parameters and reconnects based on the instruction.
  • the mobile station device Even if the maximum number of RACH transmissions is exceeded, the mobile station device continues to transmit the RACH with the same parameters to the base station device until a new instruction is issued from an upper layer.
  • the process is defined as the random access problem process until the random access problem is detected from the RACH transmission and the reconnection process is performed.
  • the component carrier (CC) corresponds to the downlink and the uplink, respectively, and the RACH of a certain CC means a RACH associated with a certain downlink CC. That is, even when a plurality of RACHs are arranged in one uplink CC and each is associated with another downlink CC, it is interpreted as a RACH of another CC.
  • FIG. 1 is a block diagram showing a schematic functional configuration of a mobile station device 100 (first communication device) according to the present embodiment.
  • the mobile station apparatus 100 includes a transmission unit 110, a reception unit 120, a scheduling unit 130, and an antenna 107.
  • the transmission unit 110 includes a data control unit 101, a modulation unit 102, and a wireless transmission unit 103.
  • the reception unit 120 includes a wireless reception unit 104, a demodulation unit 105, and a data extraction unit 106.
  • the scheduling unit 130 includes a timer control unit 140, a counter control unit 150, and a transmission information control unit 160.
  • the timer control unit 140 includes a timer unit 108. A plurality of timers are set in the timer unit 108 in advance. Among them, there are timers whose usage purpose and usage are determined, and spare timers to which a new usage purpose can be assigned according to system expansion or the like.
  • the counter control unit 150 includes a counter unit 109. A plurality of counters are set in the counter unit 109 in advance. Among them, there are counters for which the purpose of use / use is determined, and a spare counter to which a new purpose of use can be assigned according to system expansion or the like.
  • the transmission information control unit 160 includes a RACH generation unit 111.
  • User data and control data are input to the data control unit 101 from the upper layer.
  • the data control unit 101 arranges the input data on the PUSCH or PUCCH according to an instruction from the scheduling unit 130.
  • an uplink reference signal (UL-RS) is also arranged.
  • the modulation unit 102 performs data modulation and inserts discrete Fourier transform (Discrete Fourier Transform, hereinafter referred to as DFT), subcarrier mapping, inverse fast Fourier transform (Inverse Fast Fourier Transform, hereinafter referred to as IFFT), and CP (Cyclic Prefix) insertion.
  • DFT discrete Fourier Transform
  • IFFT inverse fast Fourier transform
  • CP Cyclic Prefix
  • the radio transmission unit 103 up-converts the modulated data to a radio frequency, and then transmits the data to the base station apparatus via the antenna 107.
  • the radio reception unit 104 receives a downlink signal from the base station apparatus, down-converts it to a baseband signal, and outputs the received signal to the demodulation unit 105.
  • the demodulator 105 demodulates the received data.
  • the data extraction unit 106 separates the received data into user data and control data. Further, the data extraction unit 106 outputs scheduling information, random access response messages, control data related to intermittent reception control, and other second layer control data to the scheduling unit 130, and outputs user data to the upper layer.
  • the scheduling unit 130 analyzes the control data input from the data extraction unit 106 and outputs the scheduling information included in the scheduling information and the random access response message to the transmission information control unit 160.
  • the transmission information control unit 160 instructs the data control unit 101 to allocate user data and control data to the PUSCH and PUCCH from the scheduling information. Furthermore, RACH generation unit 111 randomly selects a random access preamble number used for random access according to an instruction from scheduling unit 130, generates a random access preamble of the selected random access preamble number, and outputs the random access preamble number to modulation unit 102.
  • the timer control unit 140 is used to adjust the transmission timing between the mobile station apparatus and the base station apparatus, and measures the time from signal transmission to response to the signal, and varies depending on the signal and CC to be timed. Use a timer to count the time (transmission time, synchronization time, etc.) according to the purpose. For example, the timer control unit 140 can also measure the connection time between the mobile station device and the base station device in the wireless communication system. When the timer reaches the expiration time, the mobile station device considers that the mobile station device and the base station device cannot be connected, and tries a new connection by changing parameters.
  • the counter control unit 150 assigns a transmission counter and a reception counter to a signal in a certain frequency band, and measures the number of transmissions or the number of receptions. For example, when PUSCH is assigned to and transmitted from four CCs CC # 0 to CC # 3, and a transmission counter is provided for each CC, and the number of transmissions is to be measured, the counter control unit 150 can select any of the counter units 109. Are assigned to each CC. In this patent, the counter control unit 150 assigns a random access channel transmission counter for measuring the number of random access channel transmissions transmitted from a certain CC.
  • FIG. 2 is a block diagram showing a schematic functional configuration of the base station apparatus 200 (second communication apparatus) according to the present embodiment.
  • Base station apparatus 200 includes transmission section 210, reception section 220, scheduling section 230, and antenna 207.
  • the transmission unit 210 includes a data control unit 201, a modulation unit 202, and a wireless transmission unit 203.
  • the receiving unit 220 includes a wireless receiving unit 204, a demodulating unit 205, a data extracting unit 206, and a RACH detecting unit 212.
  • the scheduling unit 230 includes a timer control unit 240, a counter control unit 250, and a transmission information control unit 260.
  • the timer control unit 240 includes a timer unit 208. A plurality of timers are set in the timer unit 208 in advance. Among them, there are timers whose usage purpose and usage are determined, and spare timers to which a new usage purpose can be assigned according to system expansion or the like.
  • the counter control unit 250 includes a counter unit 209. A plurality of counters are set in the counter unit 209 in advance. Among them, there are counters for which the purpose of use / use is determined, and a spare counter to which a new purpose of use can be assigned according to system expansion or the like.
  • the transmission information control unit 260 includes a random access response (Random Access Response, hereinafter referred to as RAR) message generation unit 211.
  • RAR random access response
  • the data control unit 201 inputs user data and control data, maps control data to the PDCCH according to an instruction from the scheduling unit 230, and maps transmission data and control data for each mobile station apparatus to the PDSCH.
  • the modulation unit 202 performs signal processing such as data modulation, serial / parallel conversion of input signals, IFFT, CP insertion, and filtering, and generates a transmission signal.
  • Radio transmission section 203 up-converts the modulated data to a radio frequency, and then transmits the data to mobile station apparatus via antenna 207.
  • the radio reception unit 204 receives an uplink signal from the mobile station apparatus, down-converts it to a baseband signal, and outputs the received data to the demodulation unit 205 and the RACH detection unit 212.
  • the data extraction unit 206 confirms the correctness of the received data and notifies the scheduling unit 230 of the confirmation result. If the received data is correct, the data extraction unit 206 separates the received data into user data and control data. The data extraction unit 206 outputs the control data of the second layer such as downlink CQI information and the success / failure of the downlink data (ACK / NACK) in the control data to the scheduling unit 230, and the other third layer Control data and user data are output to the upper layer. If the received data is in error, the data extraction unit 206 stores the received data for combining with the retransmitted data, and performs a combining process when the retransmitted data is received.
  • the control data of the second layer such as downlink CQI information and the success / failure of the downlink data (ACK / NACK) in the control data
  • ACK / NACK the success / failure of the downlink data
  • the data extraction unit 206 stores the received data for combining with the retransmitted data, and performs a
  • Scheduling unit 230 performs scheduling for mapping user data and control data to PDSCH and PDCCH.
  • the transmission information control unit 260 performs scheduling for mapping user data to the PUSCH based on the resource allocation request from the mobile station device 100.
  • the RAR message generation unit 211 generates a random access response message (corresponding to message 2 in FIG. 4) from the ACK / NACK based on the correctness of the uplink received data and the detection result of the RACH detection unit 212.
  • the RACH detection unit 212 detects a random access preamble, calculates a synchronization timing shift amount, and reports the random access preamble number and the synchronization timing shift amount to the scheduling unit 230.
  • the timer control unit 240 is used to adjust the transmission timing between the mobile station apparatus and the base station apparatus, and measures the time from signal transmission to response to the signal, or varies depending on the signal or CC to be measured. Using a timer, measure the time (transmission time, synchronization time, etc.) according to the purpose. For example, the timer control unit 240 can measure the connection time between the mobile station device and the base station device in the wireless communication system. When the timer reaches the expiration time, the base station apparatus considers that the mobile station apparatus and the base station apparatus cannot be connected, and changes the parameters and tries a new connection.
  • the counter control unit 250 assigns a transmission counter or reception counter for measuring the number of transmissions or receptions of a certain CC signal from the counter unit 209.
  • the random access channel transmission count of all CCs is measured with one random access channel transmission counter.
  • the random access channel transmission count is measured by a random access channel transmission counter, and when the predetermined maximum transmission count is reached, the MAC layer detects a random access problem.
  • the RRC layer is notified that the random access problem has been detected.
  • the RRC layer receives the information, regards all the plurality of CCs as RLF, stops RACH transmission, and performs reconnection processing.
  • the mobile station device 100 selects a plurality of CCs.
  • the transmission information control unit 160 instructs the RACH generation unit 111 to generate a random access preamble to be assigned to each CC.
  • the transmission information control unit 160 instructs the counter control unit 150 to allocate one counter in order to measure the number of random access channel transmissions transmitted using each CC.
  • the counter control unit 150 arbitrarily assigns a counter for measuring the number of RACH transmissions from the counter unit 109.
  • FIG. 5 is a schematic process flowchart showing a random access problem detection method using a random access procedure and a random access channel transmission counter according to the present embodiment.
  • the mobile station apparatus 100 sets a random access problem detection method. The following will be described along the procedure.
  • the mobile station device 100 performs initialization processing of a random access channel transmission counter (step s101).
  • the mobile station device 100 compares the current random access channel transmission count recorded in the random access channel transmission counter with a predetermined random access channel maximum transmission count (step s102).
  • the mobile station device 100 transmits to perform random access with the base station device 200.
  • the RACH generation unit 111 generates RACH (Msg1) based on the instruction from the information control unit 160, and transmits the RACH (Msg1) from the radio transmission unit 103 to the base station apparatus 200 via the antenna 107 (step s103).
  • the random access channel transmission counter measures the number of random access channel transmissions (step s104).
  • the scheduling unit 130 assigns a message 2 reception timer (Msg2_Rx_Timer) from the timer unit 108 to the timer control unit 140 and gives an instruction to start it (step s105).
  • the mobile station device 100 continues to monitor the message 2 (step s106) until the message 2 reception timer reaches the expiration time (step s107). If the message 2 reception timer reaches the expiration time (step s107: YES) before the mobile station device 100 receives the message 2 (step s106: NO), the timer control unit 140 initializes the message 2 reception timer.
  • the random access procedure is redone from the transmission of RACH (Msg1) (step s102) (step s108).
  • step s106: YES the message 2 reception timer reaches the expiration time
  • step s107: NO the mobile station device 100, based on the scheduling information included in the message 2, A new uplink signal (Msg3) is generated, and is transmitted from the radio transmission unit 103 to the base station apparatus 200 via the antenna 107 (step s109).
  • the scheduling unit 130 assigns a message 4 reception timer (Msg4_Rx_Timer) from the timer unit 108 to the timer control unit 140 and gives an instruction to start it (step s110).
  • the mobile station device 100 continues to monitor the message 4 (step s111) until the message 4 reception timer reaches the expiration time (step s112).
  • the timer control unit 140 initializes the message 4 reception timer.
  • the random access procedure is redone from the transmission of RACH (Msg1) (step s102) (step s113). If the reception unit 120 receives the message 4 before the message 4 reception timer reaches the expiration time (step s112: NO) (step s111: YES), the mobile station device 100 performs random access with the base station device 200.
  • the random access procedure is terminated with the success.
  • the maximum number of transmissions of the random access channel may be uniquely determined in advance by the system, may be notified simultaneously from the base station apparatus to the mobile station apparatus as broadcast information, or may be individually transmitted from the base station apparatus. You may notify to a mobile station apparatus.
  • step s102 YES
  • the MAC layer of the mobile station device 100 recognizes that a random access problem has been detected (step s114), and notifies the RRC layer, which is an upper layer of the MAC layer, of the random access problem (step s115).
  • the RRC layer recognizes that a radio link failure (RLF) has been detected for the component carrier (CC) in which the random access problem has been detected (step s116).
  • the RRC layer releases the radio resource used for RACH transmission and performs reconnection processing.
  • the reconnection process includes changing a parameter such as a transmission frequency and redoing the random access procedure from step s101.
  • the mobile station apparatus 100 continues to transmit the RACH to the base station apparatus 200 until it is recognized that RLF has occurred in the RRC layer (except for step s102).
  • FIG. 6 is a flowchart showing a random access channel transmission counter allocation method according to the first embodiment.
  • the mobile station device 100 selects one or more CCs to which the RACH is allocated (Step s201).
  • the counter control unit 150 sets one counter (random access channel transmission counter) for measuring the number of RACH transmissions from the counter unit 109 (step s202). This counter measures the number of random access channel transmissions regardless of the CC from which the RACH is transmitted. Since the subsequent random access procedure is based on FIG.
  • the number of random access channel transmissions of all CCs selected by one random access channel transmission counter is managed, and a random access problem is detected when the random access channel transmission counter reaches the maximum number of transmissions. Therefore, it is possible to detect the random access problem of the entire CC selected by one random access channel transmission counter. Therefore, the mobile station apparatus can easily control the random access channel transmission counter.
  • the mobile station apparatus selects any one of the plurality of CCs and assigns a random access channel transmission counter to the CC.
  • RACH transmission may or may not be performed for CCs other than the CC to which the random access channel transmission counter is assigned.
  • CCs other than the CC to which the counter is assigned perform RACH transmission.
  • the random access channel transmission counter does not measure the number of transmissions.
  • the RACH transmission count is measured by a random access channel transmission counter, and when the predetermined maximum transmission count is reached, the MAC layer detects a random access problem in the RRC layer. To be notified.
  • the RRC layer receives the information, regards all the plurality of CCs as RLF, stops RACH transmission, and performs reconnection processing. However, if the mobile station apparatus receives a random access response message for a CC other than the CC to which the random access channel transmission counter is allocated before measuring the maximum number of transmissions, the mobile station apparatus communicates with the base station apparatus using the CC. To do.
  • FIG. 7 is a flowchart showing a random access channel transmission counter allocation method according to the second embodiment.
  • the mobile station device 100 selects one or more CCs to which the RACH is assigned (step s301).
  • the counter control unit 150 sets one counter for measuring the number of RACH transmissions from the counter unit 109 (step s302).
  • the mobile station device 100 selects one CC to which a random access channel transmission counter is assigned (step s303).
  • the random access channel transmission counter only measures the RACH transmission of this CC. Since the subsequent processing is the same as in the first embodiment, the description thereof is omitted here.
  • the mobile station apparatus selects one CC to which a random access channel transmission counter is assigned from a plurality of CCs, and performs random access problem detection only for that one CC. Even when communication is performed using a plurality of CCs, the mobile station apparatus can easily control the random access channel transmission counter.
  • the mobile station apparatus 100 selects an arbitrary CC from among a plurality of CCs, and performs a random access procedure using only that CC. That is, the mobile station device 100 transmits the RACH to the base station device 200 only in the selected CC. Moreover, the mobile station apparatus 100 allocates a random access channel transmission counter only to the selected CC, and detects a random access problem. Each time RACH is transmitted from the CC, the mobile station apparatus 100 measures the number of RACH transmissions with a random access channel transmission counter, and when the predetermined maximum number of transmissions is reached, the MAC layer detects a random access problem in the RRC layer. Notify that. The RRC layer receives the information, regards all the plurality of CCs as RLF, stops RACH transmission, and performs reconnection processing.
  • the random access channel transmission counter is assigned only to the selected CC and the random access problem is detected. Therefore, the number of RACHs transmitted from the mobile station apparatus to the base station apparatus can be reduced, and power saving can be achieved. I can plan.
  • the mobile station apparatus When the mobile station apparatus communicates using a plurality of CCs, the mobile station apparatus sets a master component carrier (hereinafter referred to as M-CC).
  • M-CC master component carrier
  • the mobile station apparatus performs RACH transmission using only the M-CC.
  • the mobile station apparatus measures a random access channel transmission counter.
  • the MAC layer When the predetermined maximum number of transmissions is reached, the MAC layer notifies the RRC layer that a random access problem has been detected. To do.
  • the RRC layer regards all the plurality of CCs as RLF, stops RACH transmission, and performs reconnection processing.
  • the master component carrier is an uplink component carrier that is paired with a downlink component carrier that is first accessed by the mobile station apparatus.
  • it is an uplink component carrier that is paired with a downlink component carrier that the base station device individually designates to the mobile station device using the RRC message.
  • it is an uplink component carrier paired with the downlink component carrier having the highest priority of the downlink component carrier included in the broadcast information.
  • it is an uplink component carrier paired with an arbitrary downlink component carrier selected by the mobile station device among the downlink component carriers received by the mobile station device.
  • FIG. 8 is a flowchart showing a random access channel transmission counter allocation method according to the third embodiment.
  • the mobile station apparatus 100 sets an M-CC as a CC to which a RACH is allocated (if it is already broadcast from the base station apparatus, it is selected) (step s401).
  • the mobile station device 100 assigns a random access channel transmission counter to the M-CC (step s402).
  • the random access channel transmission counter measures only M-CC RACH transmission. Since the subsequent processing is the same as in the first embodiment, the description thereof is omitted here.
  • RACH transmission is performed only by M-CC, so that radio resources used for RACH can be saved, and random access problem detection is performed only by M-CC. And random access problem detection for a plurality of CCs can be simplified.
  • the mobile station apparatus When transmitting a RACH by selecting a plurality of CCs, the mobile station apparatus assigns a random access channel transmission counter to each of the plurality of CCs, and performs a random access problem detection in each CC.
  • FIG. 9 is a flowchart showing a random access channel transmission counter allocation method according to the fourth embodiment.
  • the mobile station device 100 selects one or more CCs to which the RACH is assigned (step s501).
  • the mobile station apparatus 100 sets a counter (random access channel transmission counter) for measuring the number of RACH transmissions from the counter unit 109 in the counter control unit 150 to the CC selected in step s501 (step s502). ).
  • the random access channel transmission counter measures only the number of transmissions of the allocated CC RACH.
  • the parameters (for example, the maximum number of transmissions) of each random access channel transmission counter may be the same or different for each CC. Since the subsequent processing is the same as in the first embodiment, the description thereof is omitted here.
  • the mobile station apparatus 100 allocates different random access channel transmission counters in the CC and detects a random access problem for each CC.
  • the random access channel transmission counter can be reused by a plurality of CCs. For example, when the mobile station apparatus 100 assigns a random access channel transmission counter to a certain CC and detects a random access problem in that CC, the mobile station apparatus 100 assigns the random access channel transmission counter to another CC, and randomly Measures the number of access channel transmissions and detects random access problems. However, when allocating to other CC, the mobile station apparatus 100 initializes the transmission frequency of the random access channel transmission counter.
  • the fourth embodiment by managing the random access problem in each CC, even if a certain CC is recognized as an RLF and radio resources are released, attempts to connect to the base station apparatus continue in other CCs. The access attempt can be continued until the random access with the base station apparatus is completed.
  • the component carrier itself that constitutes a wide frequency band may be further constituted by a plurality of component carriers.
  • a component carrier composed of a plurality of component carriers (groups) is referred to as a component carrier group (CCG: Component Carrier Group).
  • a broadband system band for example, a system band having a bandwidth of 100 MHz
  • two component carrier groups for example, a component carrier group (CCG-0) having a bandwidth of 40 MHz.
  • a component carrier group (CCG-1) having a bandwidth of 60 MHz) can be further composed of a plurality of component carriers.
  • a component carrier group (CCG-0) having a bandwidth of 40 MHz is configured by aggregating two component carriers (CC-0, CC-1) having a bandwidth of 20 MHz
  • a component carrier group (CCG-1) having a bandwidth of 60 MHz is configured by aggregating three component carriers (CC-2, CC-3, CC-4) having a bandwidth of 20 MHz.
  • the component carrier and / or the component carrier group may be arranged in a continuous frequency band or a discontinuous frequency band, and may be continuous and / or discontinuous. Multiple component carriers and / or component keys that are frequency bands By aggregating rear group, it is possible to construct a wide-band system band.
  • the downlink frequency band (DL system band, DL system bandwidth) and the uplink frequency band (UL system band, UL system bandwidth) configured by component carriers and / or component carrier groups are the same. It doesn't have to be bandwidth. Even if the base station apparatus and the mobile station apparatus have different bandwidths for the DL system band and the UL system band, they can communicate using these frequency bands.
  • the mobile station apparatus can manage the random access problem with a CCG in which a plurality of CCs are collected in a certain number, and can apply the random access problem detection method according to the first to fourth embodiments for each CCG.
  • the mobile station apparatus can manage different random access problems for each CCG.
  • FIG. 10 is a flowchart showing a random access channel transmission counter allocation method according to the fifth embodiment.
  • the mobile station device 100 selects one or more CCs to which the RACH is assigned (step s601).
  • the scheduling unit 130 assigns information (for example, CCGID) for forming a CCG to each CC, and forms a plurality of CCGs (when there is one CCG, the same as in the first to fourth embodiments) ( Step s602).
  • the scheduling unit 130 measures the number of times of random access channel transmission by applying any of the first to fourth embodiments for each CCG (step s603).
  • the allocation method of the random access channel transmission counter may be the same for each CCG, or may be different. Since the subsequent processing is the same as in the first embodiment, the description thereof is omitted here.
  • Information for forming the CCG may be uniquely determined in advance by the system, may be notified from the base station apparatus to the mobile station apparatus as broadcast information all at once, or may be individually transmitted from the base station apparatus to the individual mobile station. The device may be notified.
  • random access problem detection can be performed flexibly.
  • the timing at which the timer control unit 140 activates the random access problem detection timer is after the random access channel transmission counter according to the first to fifth embodiments reaches the maximum number of transmissions.
  • FIG. 11 is a flowchart of a schematic process showing a random access problem detection method using a random access procedure and a timer according to the present embodiment.
  • the mobile station apparatus 100 performs initialization processing of a random access problem detection timer (step s701). Subsequently, when the random access channel transmission counter reaches the maximum number of transmissions, the timer control unit 140 activates a random access problem detection timer (step s702). The mobile station apparatus 100 confirms whether the random access problem detection timer has reached the expiration time (step s703). If the random access problem detection timer has not reached the expiration time (step s703: NO), the mobile station device 100 confirms whether RACH transmission has been successful (step s704).
  • the mobile station device 100 When the RACH transmission is successful (step s704: YES), the mobile station device 100 recognizes that the random access with the base station device 200 is successful, and ends the random access procedure.
  • the expiration time measured by the random access problem detection timer may be uniquely determined in advance by the system, may be notified simultaneously from the base station apparatus to the mobile station apparatus as broadcast information, or the base station The notification may be sent from the apparatus to the individual mobile station apparatus.
  • step s703 YES
  • the MAC layer of the mobile station device 100 recognizes that a random access problem has been detected (step s705), and notifies the RRC layer, which is an upper layer of the MAC layer, of the random access problem (step s706).
  • the RRC layer Upon receiving the notification, the RRC layer recognizes that a radio link failure (RLF) has been detected for the component carrier (CC) in which the random access problem has been detected (step s707). Then, the RRC layer performs a reconnection process.
  • the reconnection process includes changing a parameter such as a transmission frequency and redoing the random access procedure from step s701.
  • an existing timer may be substituted for the timer to be used, or a new random access problem detection timer may be assigned.
  • the existing timer is not a timer for measuring the transmission time of the random access channel, but a timer that has been set for a different use / purpose.
  • a radio link failure detection timer can be used as a random access problem detection timer.
  • the information may be uniquely determined in advance by the system, may be notified simultaneously from the base station apparatus to the mobile station apparatus as broadcast information, or notified from the base station apparatus to individual mobile station apparatuses. May be.
  • the random access problem detection times of the random access problem detection timer assigned to each CC may be the same or different.
  • the random access problem detection timer does not release all CCs assigned to the mobile station apparatus as RLF immediately after the random access channel transmission counter reaches the maximum number of transmissions. It is possible to provide a grace period for performing RACH transmission in the CCs. If RACH transmission is successful during this time, random access between the mobile station apparatus and the base station apparatus is completed.
  • the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by a computer system and executed.
  • the “computer system” includes an OS and hardware such as peripheral devices.
  • the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
  • the “computer-readable recording medium” dynamically holds a program for a short time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. It is also possible to include those that hold a program for a certain time, such as a volatile memory inside a computer system serving as a server or 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.
  • part or all of the mobile station apparatus and the base station apparatus in the above-described embodiment may be realized as an LSI (Large Scale Integration) that is typically an integrated circuit.
  • LSI Large Scale Integration
  • Each functional block of the mobile station apparatus and the base station apparatus may be individually chipped, or a part or all of them may be integrated into a chip.
  • the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • an integrated circuit based on the technology can be used.
  • a mobile communication system including a base station apparatus and a mobile station apparatus has been described.
  • the present invention can also be applied to a fixed wireless communication system.
  • a system is configured by a fixed wireless apparatus having the same function as the above-described base station apparatus and a fixed wireless apparatus having the same function as the above-described mobile station apparatus.
  • DESCRIPTION OF SYMBOLS 100 ... Mobile station apparatus, 101 ... Data control part, 102 ... Demodulation part, 103 ... Radio transmission part, 104 ... Radio reception part, 105 ... Demodulation part, 106 ... Data extraction part, 107 ... Antenna, 108 ... Timer part, 109 ... counter unit, 110 ... transmission unit, 111 ... RACH generation unit, 120 ... reception unit, 130 ... scheduling unit, 140 ... timer control unit, 150 ... counter control unit, 160 ... transmission information control unit, 200 ... base station device, DESCRIPTION OF SYMBOLS 201 ... Data control part, 202 ... Demodulation part, 203 ... Radio transmission part, 204 ...
  • Radio reception part 205 ... Demodulation part, 206 ... Data extraction part, 207 ... Antenna, 208 ... Timer part, 209 ... Counter part, 210 ... Transmission unit 211 ... RAR message generation unit 212 ... RACH detection unit 220 ... Reception unit 230 ... Scheduling unit 240 ... Tie Controller, 250 ... counter control unit, 260 ... transmission information control unit.

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PCT/JP2010/052325 2009-03-13 2010-02-17 移動局装置、基地局装置、集積回路、およびランダムアクセス問題の検出方法 Ceased WO2010103895A1 (ja)

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EA201101320A EA022510B1 (ru) 2009-03-13 2010-02-17 Способ детектирования проблем произвольного доступа для множества компонентных несущих частот
BRPI1008954-3A BRPI1008954B1 (pt) 2009-03-13 2010-02-17 método de detecção de problema de acesso randômico, aparelho de estação móvel, e circuito integrado
EP10750650.3A EP2408254B1 (en) 2009-03-13 2010-02-17 Mobile station apparatus, integrated circuit, and method of detecting random access problems
JP2011503752A JP4914965B2 (ja) 2009-03-13 2010-02-17 移動局装置、基地局装置、集積回路、およびランダムアクセス問題の検出方法
AU2010222296A AU2010222296B2 (en) 2009-03-13 2010-02-17 Mobile station apparatus, base station apparatus, integrated circuit, and method of detecting random access problems
US13/255,968 US20120002555A1 (en) 2009-03-13 2010-02-17 Mobile station apparatus, base station apparatus, integrated circuit, and method of detecting random access problems
CN201080011024.7A CN102349349B (zh) 2009-03-13 2010-02-17 移动站装置、基站装置、集成电路和随机接入问题的检测方法
US15/064,473 US10015823B2 (en) 2009-03-13 2016-03-08 Mobile station apparatus, base station apparatus, integrated circuit, and method of detecting random access problems

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US15/064,473 Continuation US10015823B2 (en) 2009-03-13 2016-03-08 Mobile station apparatus, base station apparatus, integrated circuit, and method of detecting random access problems

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US20160262187A1 (en) 2016-09-08
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US20120002555A1 (en) 2012-01-05
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