WO2010122892A1 - Appareil de station mobile, appareil de station de base, système de communication, procédé de réception et programme de commande - Google Patents

Appareil de station mobile, appareil de station de base, système de communication, procédé de réception et programme de commande Download PDF

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Publication number
WO2010122892A1
WO2010122892A1 PCT/JP2010/056063 JP2010056063W WO2010122892A1 WO 2010122892 A1 WO2010122892 A1 WO 2010122892A1 JP 2010056063 W JP2010056063 W JP 2010056063W WO 2010122892 A1 WO2010122892 A1 WO 2010122892A1
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Prior art keywords
station apparatus
mobile station
base station
mbms service
frequency band
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PCT/JP2010/056063
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English (en)
Japanese (ja)
Inventor
克成 上村
昇平 山田
大一郎 中嶋
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シャープ株式会社
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Publication of WO2010122892A1 publication Critical patent/WO2010122892A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

Definitions

  • the present invention relates to a technology for receiving provision of MBMS (Multimedia Broadcast Multicast Service) when a mobile station device is simultaneously receiving a plurality of frequency bands from a base station device.
  • MBMS Multimedia Broadcast Multicast Service
  • EUTRA Universal Terrestrial Radio Access
  • 3GPP 3rd Generation Generation Partnership Project
  • EUTRA Advanced EUTRA
  • Carrier Aggregation has been proposed as a technology that enables higher-speed data transmission while maintaining compatibility with EUTRA (Non-patent Document 1).
  • Carrier aggregation is a technique for improving a data rate by receiving data transmitted from a plurality of different frequency bands (carrier frequencies) at a receiving apparatus.
  • the receiving device is referred to as a mobile station device and the transmitting device is referred to as a base station device.
  • MBMS Multimedia Broadcast Multicast Service
  • SFN single frequency network
  • each cell cooperates with MBSFN to transmit the same multicast data (Shared MBSFN), and the number of users located in each cell (Point-to-Point; hereinafter referred to as “PtP”).
  • PtP Point-to-Point
  • PtM point-to-multipoint
  • the MBMS service that the mobile station apparatus (user) is interested in may be a part of the entire MBMS service provided. Considering the existence, a mechanism for receiving only the MBMS service in which the mobile station apparatus is interested is necessary.
  • a preferred frequency (Preferred Layer; PL) for selecting an MBMS service is notified from a base station device, and a mobile station device that receives an MBMS service gives priority by adding an offset to the preferred frequency.
  • PL Preferred Layer
  • a mechanism is described in which a frequency can be preferentially selected as a reception frequency. This will be described with reference to FIG.
  • FIG. 10 is a diagram showing the relationship between the MBMS service and the frequency.
  • frequency F1 and frequency F2 that are located in the same spatial area and are operated at different frequencies.
  • Different MBMS service 1 and MBMS service 2 are provided at frequency F1 and frequency F2, respectively.
  • the mobile station apparatus obtains a higher quality result than the actual measurement result by adding an offset value to the measurement result of the frequency F1.
  • the mobile station apparatus can preferentially select the frequency F1 as the reception frequency.
  • Patent Document 2 describes a mechanism for notifying an offset for each cell that provides an MBMS service.
  • the conventional MBMS reception method is based on the premise that a plurality of frequencies (frequency layers) at which the mobile station apparatus provides the MBMS service cannot be received simultaneously.
  • a plurality of frequencies (frequency layers) at which the mobile station apparatus provides the MBMS service cannot be received simultaneously.
  • carrier aggregation studied by Advanced EUTRA mobile station devices that can be connected to base station devices using multiple frequency bands are interested even if they do not preferentially select the frequency to receive. It is possible to receive an MBMS service.
  • an MBMS service providing method and an MBMS service receiving method in such a communication system have not been studied.
  • the present invention has been made in view of such circumstances.
  • a mobile station apparatus that can be connected to a base station apparatus using a plurality of frequency bands receives an MBMS service
  • the MBMS service that is of interest is efficiently used.
  • a mobile station apparatus, a base station apparatus, a communication system, a reception method, and a control program that enable efficient reception and efficient measurement of reception quality of subframes used for transmission of MBMS services The purpose is to do.
  • the present invention has taken the following measures. That is, the mobile station apparatus of the present invention is connected to a base station apparatus using a plurality of frequency bands, and from the base station apparatus, an MBSFN (Multimedia Broadcast Multicast Service over Single Frequency Network) subframe used for multicast transmission and A mobile station apparatus that receives a time-multiplexed frame of unicast subframes used in unicast transmission and is provided with an MBMS (Multimedia Broadcast Multicast Service) service, and whether or not the MBMS service is provided Regardless of the case, the control unit for identifying the MBSFN subframe and the unicast subframe for each frequency band, and the MBMS service provided in a state of being connected to the base station apparatus using a plurality of frequency bands , MBMS service information provided for each frequency band A multicast data reception processing unit that selects any one frequency band that is provided with the MBMS service from the plurality of frequency bands, and receives multicast data that is transmitted in the MBSFN subframe
  • the MBMS service information provided for each frequency band is acquired and the MBMS service is obtained from the plurality of frequency bands. Since one of the frequency bands to be provided is selected and multicast data transmitted in the MBSFN subframe of the selected frequency band is received, the MBMS service can be efficiently performed in a state where a plurality of frequency bands are being received. It becomes possible to receive.
  • the multicast data reception processing unit is based on reception quality of a signal transmitted in the MBSFN subframe or reception quality of a signal transmitted in the unicast subframe. , Selecting any one frequency band to receive the MBMS service.
  • any one frequency band to be provided with the MBMS service is selected based on the reception quality of the signal transmitted in the MBSFN subframe or the reception quality of the signal transmitted in the unicast subframe, the reception is performed.
  • the reception is performed.
  • the multicast data reception processing unit selects a frequency band having the best reception quality as a frequency band for receiving the MBMS service.
  • the MBMS service can be efficiently received and the power consumption can be reduced. Become.
  • control unit determines that the arrangement of the MBSFN subframe and the unicast subframe is based on the identification code received from the base station apparatus. It is characterized by determining whether or not a plurality of connected frequency bands are common.
  • the base station apparatus determines whether the arrangement of the MBSFN subframe and the unicast subframe is common to a plurality of frequency bands connected to the base station apparatus. Therefore, it is possible to efficiently receive the downlink reference signal and the MBSFN reference signal, and to reduce power consumption.
  • the base station apparatus of the present invention connects to a mobile station apparatus using a plurality of frequency bands, and uses MBSFN (Multimedia Broadcast Multicast Service over Single Frequency) used for multicast transmission with respect to the mobile station device.
  • MBSFN Multimedia Broadcast Multicast Service over Single Frequency
  • Network a base station apparatus that transmits a time-multiplexed frame of a unicast subframe used in unicast transmission and provides an MBMS (Multimedia Broadcast Multicast Service) service, wherein the mobile station device transmits the MBMS Regardless of whether or not the service is provided, the base station side transmitter for transmitting identification information for identifying the MBSFN subframe and the unicast subframe for each frequency band, and the frequency selected by the mobile station apparatus
  • a base station side receiving unit that receives information indicating a band from the mobile station device. It is characterized in.
  • the mobile station apparatus transmits the identification information for identifying the MBSFN subframe and the unicast subframe for each frequency band. Since the information indicating the selected frequency band is received from the mobile station apparatus, the MBMS service can be efficiently received while the mobile station apparatus is receiving a plurality of frequency bands.
  • the identification information includes the arrangement of the MBSFN subframe and the unicast subframe in common in a plurality of frequency bands used for connection with the mobile station apparatus. It is an identification code indicating whether or not there is.
  • the identification information is an identification code indicating whether or not the arrangement of the MBSFN subframe and the unicast subframe is common to a plurality of frequency bands connected to the mobile station apparatus, It is possible to efficiently receive the downlink reference signal and the MBSFN reference signal, and to reduce power consumption.
  • the communication system of the present invention is characterized by being configured by the mobile station apparatus described in (1) above and the base station apparatus described in (5) above.
  • This configuration makes it possible to efficiently receive the MBMS service while receiving a plurality of frequency bands.
  • the reception method of the present invention connects to a base station apparatus using a plurality of frequency bands, and uses an MBSFN (MultimediaFBroadcast Multicast Service over Single Frequency Network) sub that is used for multicast transmission from the base station device.
  • MBSFN MultimediaFBroadcast Multicast Service over Single Frequency Network
  • a reception method of a mobile station device that receives a frame and a frame in which a unicast subframe used in unicast transmission is time-multiplexed and receives an MBMS (Multimedia Broadcast Multicast Service) service, the control unit including: Regardless of whether or not the MBMS service is provided, the step of identifying the MBSFN subframe and the unicast subframe for each frequency band, and the multicast data reception processing unit using the plurality of frequency bands
  • the MBMS service is connected to the station device.
  • the step of obtaining the information of the MBMS service provided for each frequency band, and the multicast data reception processing unit selects any one frequency band that receives the provision of the MBMS service from the plurality of frequency bands.
  • the MBMS service information provided for each frequency band is acquired and the MBMS service is obtained from the plurality of frequency bands. Since one of the frequency bands to be provided is selected and multicast data transmitted in the MBSFN subframe of the selected frequency band is received, the MBMS service can be efficiently performed in a state where a plurality of frequency bands are being received. It becomes possible to receive.
  • any one frequency band to be provided with the MBMS service is selected based on the reception quality of the signal transmitted in the MBSFN subframe or the reception quality of the signal transmitted in the unicast subframe, the reception is performed.
  • the reception is performed.
  • the reception method of the present invention is characterized in that the multicast data reception processing unit selects a frequency band having the best reception quality as a frequency band for receiving the MBMS service.
  • the MBMS service can be efficiently received and the power consumption can be reduced. Become.
  • the arrangement of the MBSFN subframe and the unicast subframe is based on the identification code received from the base station apparatus, and the base station apparatus It is characterized by determining whether or not a plurality of frequency bands used for connection are common.
  • the base station apparatus determines whether the arrangement of the MBSFN subframe and the unicast subframe is common to a plurality of frequency bands connected to the base station apparatus. Therefore, it is possible to efficiently receive the downlink reference signal and the MBSFN reference signal, and to reduce power consumption.
  • control program of the present invention is connected to a base station apparatus using a plurality of frequency bands, and the base station apparatus uses an MBSFN (Multimedia Broadcast Multicast Service over Single Frequency Network) sub
  • MBSFN Multimedia Broadcast Multicast Service over Single Frequency Network
  • control program for a mobile station apparatus that receives a frame and a frame in which a unicast subframe used for unicast transmission is time-multiplexed and receives an MBMS (Multimedia Broadcast Multicast Service) service, Regardless of whether or not the MBMS service is provided, a process for identifying the MBSFN subframe and the unicast subframe for each frequency band, and a multicast data reception processing unit using the plurality of frequency bands MBMS while connected to a station device
  • the process of obtaining the information of the MBMS service provided for each frequency band, and the multicast data reception processing unit any one frequency receiving the MBMS service provided from the plurality of frequency bands
  • the MBMS service information provided for each frequency band is acquired and the MBMS service is obtained from the plurality of frequency bands. Since one of the frequency bands to be provided is selected and multicast data transmitted in the MBSFN subframe of the selected frequency band is received, the MBMS service can be efficiently performed in a state where a plurality of frequency bands are being received. It becomes possible to receive.
  • the present invention it is possible to efficiently receive the MBMS service while receiving a plurality of frequency bands.
  • FIG. 1 It is a figure which shows an example of the network structure of this invention. It is the figure shown about the correspondence of the downlink component carrier of this invention, and an uplink component carrier. It is a block diagram which shows schematic structure of the base station apparatus which concerns on 1st Embodiment. It is a block diagram which shows schematic structure of the mobile station apparatus which concerns on 1st Embodiment. It is a sequence chart in the case of performing carrier aggregation with a plurality of frequencies providing the MBMS service. It is a flowchart which shows a reception MBMS selection process. It is another sequence chart in the case of performing carrier aggregation with a plurality of frequencies providing the MBMS service.
  • an MBMS reception method in a mobile station apparatus connected to a base station apparatus using a plurality of frequencies will be described.
  • the core concept of the present invention is not particularly limited to the MBMS reception method. It can also be applied to the situation. Moreover, it is not limited to EUTRA or Advanced EUTRA.
  • FIG. 12 is a diagram illustrating an example of carrier aggregation.
  • Band 1 to Band 3 indicate downlink frequency bands (component carriers) transmitted by the base station apparatus, and the transmission bandwidths may be the same or may be partially or completely different.
  • FIG. 12 shows an example in which all downlink frequency bands are 20 MHz.
  • Band 1 to Band 3 may be continuous frequency bands or may be frequency bands in which all or part of them are discontinuous.
  • the mobile station apparatus of this example can receive at least three 20 MHz frequency bands at the same time, and the total reception bandwidth is 60 MHz.
  • the mobile station apparatus communicates with the base station apparatus using 20 MHz of Band3, and simultaneously measures Band1 to Band2.
  • Band 2 is added to the mobile station apparatus, and communication is performed with the base station apparatus using a total of 40 MHz of Band 2 and Band 3, and Band 1 is measured at the same time.
  • Band1 is further added to the mobile station apparatus, and communication is performed with the base station apparatus using a total of 60 MHz of Band1 to Band3.
  • the mobile station apparatus is deleting Band2 and is communicating with the base station apparatus using a total of 40 MHz of Band1 and Band3, and simultaneously measuring Band2.
  • the time length of Time 1 to Time 4 is variable.
  • OFDMA Orthogonal Frequency Division Multiplexing Access
  • the synchronization signal is used by the mobile station device to detect the base station device (or relay station device) at high speed.
  • the synchronization signal is composed of three types of primary synchronization signals and secondary synchronization signals in which 31 types of codes are alternately arranged, and 504 ways of identifying a base station apparatus by a combination of the signals of the primary synchronization signal and the secondary synchronization signal.
  • the cell ID and the frame timing for radio synchronization are shown.
  • the mobile station apparatus specifies the cell ID received by the cell search.
  • the physical broadcast information channel (PBCH; Physical ⁇ Broadcast Channel) is transmitted for the purpose of reporting 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 information channel is transmitted using the downlink data channel with the radio resource notified on the downlink shared control channel.
  • broadcast information MBMS information, cell global ID indicating individual cell ID, and the like are notified.
  • the downlink reference signal is a pilot signal transmitted at a predetermined power for each cell.
  • the downlink reference signal is a signal that is periodically repeated at a predetermined time interval (for example, one frame), and the mobile station apparatus receives the downlink reference signal at the predetermined time interval and measures the reception quality. Therefore, it is used for judging reception quality for each cell. Further, it is used as a reference signal for demodulation of the downlink shared control channel or downlink data channel transmitted simultaneously with the downlink reference signal.
  • the sequence used for the downlink reference signal is a sequence that can be uniquely identified for each cell.
  • a downlink reference signal may be described as cell-specific RS (Cell-specific reference signal), its use and meaning are the same.
  • a downlink shared control channel (PDCCH) is transmitted with the number of OFDM symbols at the head of each subframe, and radio resource allocation according to scheduling of the base station apparatus (or relay station apparatus) is performed for the mobile station apparatus. Used for instructing information and the amount of transmission power adjustment.
  • the mobile station apparatus receives the downlink shared control channel before transmitting / receiving downlink unicast data (downlink traffic data) and control messages, performs uplink radio resource allocation at the time of transmission, and downlink radio resource allocation information at the time of reception. Need to get.
  • the downlink data channel (PDSCH: Physical Downlink Shared Channel) is used to transmit a part of paging information and broadcast information in addition to unicast data.
  • the radio resource allocation information of the downlink data channel is indicated by the downlink shared control channel.
  • the physical multicast channel (PMCH: Physical Multicast Channel) transmits multicast data for providing the MBMS service.
  • the physical multicast channel is transmitted in the MBSFN subframe and is time-multiplexed with the downlink shared control channel in the subframe.
  • the MBSFN reference signal (MBSFN-RS; MBSFN Reference signal) is transmitted simultaneously with the physical multicast channel and used as a reference signal for demodulating the physical multicast channel.
  • the uplink data channel (PUSCH: Physical Uplink Shared Channel) mainly transmits uplink unicast data (uplink traffic data) and can include control data such as downlink quality and ACK / NACK. Similarly to the downlink, the radio resource allocation information of the uplink data channel is indicated by the downlink shared control channel.
  • PUSCH Physical Uplink Shared Channel
  • the random access channel (PRACH: Physical Random Access Channel) is a channel used for transmitting a preamble sequence and has a guard time.
  • the random access channel is used as an access procedure to the base station apparatus (or relay station) when the uplink transmission timing is asynchronous, and is used for adjusting the radio resource request and the uplink transmission timing. Since other physical channels are not related to each embodiment of the present invention, detailed description thereof is omitted.
  • MBMS As a cell providing the MBMS service, multicast transmission (multicast transmission) is performed using a frequency different from the frequency used for unicast transmission (unicast data transmission from a single cell to each mobile station apparatus).
  • Cell MBMS Dedicated Cell
  • mixed cell MBMS / Unicast-mixedCell
  • the base station apparatus provides an MBMS service to a plurality of mobile station apparatuses (users) by transmitting multicast data using any one of these cells.
  • multicast transmission and unicast transmission are multiplexed in a time division manner.
  • FIG. 11 is a diagram illustrating an arrangement example of multicast transmission and unicast transmission in a mixed cell.
  • a frame including the MBMS service and which subframe in the frame is used for the MBMS service is determined for each cell.
  • This arrangement information is called an MBSFN subframe arrangement pattern (MBSFN Subframe Allocation Pattern; MSAP), and a pattern is notified in advance from the base station apparatus to the mobile station apparatus using broadcast information. Can know whether multicast data is transmitted.
  • a subframe that is notified by the MBSFN subframe arrangement pattern and may be provided with the MBMS service is referred to as an MBSFN subframe, and a frame including the MBSFN subframe is referred to as an MBSFN frame.
  • a subframe in which unicast data is arranged is called a unicast subframe.
  • a rectangle with a dotted pattern indicates an MBSFN subframe
  • a white rectangle indicates a unicast subframe.
  • the mobile station apparatus does not receive the downlink reference signal in the OFDM symbol in which multicast data is transmitted.
  • MBSFN-ID also referred to as MBMS service ID
  • MBSFN-ID uses a method notified using a multicast control channel (MCCH; Multicast Control Channel) that is a logical channel arranged in the MBSFN subframe, and a dedicated control channel (DCCH; Dedicated Control Channel).
  • MCCH multicast control channel
  • DCCH dedicated control channel
  • the base station apparatus can also transmit the MCCH divided into a primary MCCH and a secondary MCCH hierarchical structure.
  • a radio resource in which the secondary MCCH is arranged by the primary MCCH is indicated.
  • MBSFN-ID is notified to a mobile station apparatus using primary MCCH and secondary MCCH.
  • FIG. 1 is a diagram showing an example of a network configuration of the present invention.
  • the mobile station apparatus 10 can simultaneously communicate in a plurality of frequency bands (Band 1 to Band 3) by carrier aggregation, as a network configuration, a certain base station apparatus 21 transmits a transmission apparatus (for each of a plurality of frequency bands ( A receiving device) 21a and 21b (Band2 to Band3), and a case where one base station device 22 includes one transmitting device (receiving device) 22a for each frequency band (Band1). Furthermore, both of them may be mixed. In any configuration, there is no problem in realizing this embodiment.
  • the base station devices 21 and 22 can be managed by the host control station device 30, and carrier aggregation may be realized by performing cooperative control between the base station devices 21 and 22.
  • FIG. 2 is a diagram illustrating an example of a correspondence relationship between a downlink component carrier and an uplink component carrier that are configured when the mobile station apparatus of the present invention performs carrier aggregation.
  • the downlink component carrier DL_CC1 corresponds to the uplink component carrier UL_CC1. That is, ACK / NACK of data received by DL_CC1 and reception quality feedback are transmitted using the radio resource of UL_CC1.
  • a case where a plurality of downlink component carriers correspond to the uplink component carrier is also possible.
  • both ACK / NACK of data received by DL_CC2 and DL_CC3 and feedback of reception quality are transmitted using the radio resource of UL_CC2.
  • the mobile station apparatus recognizes as a cell without particular awareness of which base station apparatus the downlink component carrier is transmitted from and which base station apparatus receives the uplink component carrier. Then, information such as the frequency band and bandwidth of the corresponding uplink component carrier is acquired from the broadcast information of the selected cell.
  • This embodiment shows a method in which a mobile station apparatus selects and receives a component carrier that provides the same MBMS service for MBMS reception.
  • FIG. 3 is a block diagram showing a schematic configuration of the base station apparatus according to the first embodiment of the present invention.
  • the base station apparatus 300 includes a reception unit 301, a demodulation unit 302, a decoding unit 303, an upper layer 304, an encoding unit 305, a modulation unit 306, an RS generation unit 307, an MBSFN-RS generation unit 308, a multiplexing unit 309, a transmission unit 310,
  • the control unit 311 is configured.
  • the upper layer 304 inputs downlink unicast data and downlink control data to the encoding unit 305.
  • the encoding unit 305 encodes the input data and inputs the encoded data to the modulation unit 306.
  • Modulation section 306 modulates the encoded signal. Further, the signal output from modulation section 306 and the downlink reference signal generated by RS generation section 307 are mapped to the frequency domain by multiplexing section 309. Similarly, multicast data is input to encoding section 305 and encoded data is output to modulation section 306.
  • the multicast data modulated by the modulation unit 306 is mapped to the frequency domain by the MBSFN reference signal generated from the MBSFN-RS generation unit 308 and the multiplexing unit 309.
  • An output signal from the multiplexing unit 309 is input to the transmission unit 310.
  • Transmitter 310 converts a frequency domain signal into a time domain signal, performs power amplification on a carrier wave of a predetermined frequency, and transmits the signal.
  • the reception unit 301 converts a signal received from the mobile station device into a baseband digital signal.
  • the digital signal is input to the demodulation unit 302 and demodulated.
  • the signal demodulated by the demodulator 302 is then input to the decoder 303 and decoded, and the uplink control data and uplink unicast data decoded correctly are output to the upper layer 304.
  • Control information necessary for control of these blocks is input from the upper layer 304 to the control unit 311, and control information related to transmission from the control unit 311 is transmitted as transmission control information by an encoding unit 305, a modulation unit 306, and RS generation Control information related to reception is appropriately input to each block of the reception unit 301, demodulation unit 302, and decoding unit 303 as reception control information in each block of the unit 307, multiplexing unit 309, and transmission unit 310.
  • the other components of the base station apparatus are omitted because they are not related to the present embodiment.
  • FIG. 4 is a block diagram showing a schematic configuration of the mobile station apparatus according to the first embodiment of the present invention.
  • the mobile station apparatus 400 includes a reception unit 401, a demodulation unit 402, a decoding unit 403, a measurement processing unit 404, a multicast data reception processing unit 405, a random access generation unit 406, a coding unit 407, a modulation unit 408, a transmission unit 409, a transmission band.
  • a setting unit 410 and a control unit 411 are included.
  • control information Prior to reception, control information is input from the upper layer 412 to the control unit 411, and control information related to reception is appropriately input to the reception unit 401, demodulation unit 402, and decoding unit 403 as reception control information.
  • the reception control information includes information such as MBMS information (MBSFN-ID, MBSFN subframe information, MBMB service information, etc.), reception timing, multiplexing method, resource allocation information, etc. for each channel in addition to reception frequency band information. It is.
  • the received signal is received by the receiving unit 401.
  • the receiving unit 401 receives a signal in the frequency band specified by the reception control information.
  • the received signal is input to the demodulation unit 402.
  • Demodulation section 402 demodulates the received signal and outputs it to decoding section 403.
  • the decoding unit 403 correctly decodes downlink unicast data and downlink control data from the input signal, and outputs each decoded data to the upper layer 412. Further, based on the MBMS information, the unicast subframe and the MBSFN subframe are identified, and multicast data is received according to the identification.
  • the multicast data is input to the multicast data reception processing unit 405, acquires the multicast data that provides the MBMS service to be received, and transmits the multicast data to the upper layer 412.
  • Downlink control data is also input to the measurement processing unit 404.
  • the measurement processing unit 404 is based on the reception quality of the downlink reference signal for each cell or the MBSFN reference signal (MBSFN-RS) transmitted in the MBSFN subframe, and the reception error rate of the downlink shared control channel or downlink data channel. Measurement information is generated, and the measurement information is output to the upper layer 412.
  • MBSFN-RS MBSFN reference signal
  • control information Prior to transmission, control information is input from the upper layer 412 to the control unit 411, and control information related to transmission is transmitted to the random access generation unit 406, encoding unit 407, modulation unit 408, and transmission band setting unit 410 as transmission control information. Entered appropriately.
  • the transmission control information includes information such as code information, modulation information, transmission frequency band information, transmission timing for each channel, multiplexing method, and resource allocation information as uplink scheduling information of the transmission signal.
  • the random access information is input to the random access generation unit 406, and random access data is generated.
  • the random access information includes preamble information, radio resource information for random access, and the like.
  • uplink unicast data and uplink control data are input to the encoding unit 407 from the upper layer 412.
  • the encoding unit 407 appropriately encodes each data according to the transmission control information and outputs the data to the modulation unit 408.
  • the modulation unit 408 modulates the output from the coding unit 407.
  • the transmission band setting unit 410 sets a frequency band to be transmitted to the transmission unit 409.
  • the transmission unit 409 maps the output of the modulation unit 408 to the frequency domain, converts the frequency domain signal into a time domain signal, performs power amplification on a predetermined frequency carrier wave, and transmits the signal.
  • other components of the mobile station apparatus are omitted because they are not related to the present embodiment.
  • the correspondence between the network configuration and the frequency band of the communication system in which the base station apparatus 300 and the mobile station apparatus 400 are arranged can be the same as those shown in FIGS.
  • FIG. 5 is a sequence chart diagram when carrier aggregation is performed at a plurality of frequencies providing the MBMS service.
  • the reception of the MBMS service is a series of operations in which the mobile station apparatus acquires interested multicast data from the multicast data input to the multicast data reception processing unit based on the MBMS information.
  • the component carriers CC1 to CC3 are configured by a downlink component carrier (DL) transmitted from the base station apparatus 300 and an uplink component carrier (UL) corresponding to the downlink component carrier.
  • DL downlink component carrier
  • UL uplink component carrier
  • the mobile station device 400 can be connected to the base station device using a plurality of component carriers CC1 to CC3 by carrier aggregation.
  • the connection of the mobile station device to the base station device using the component carrier is also simply expressed as “connect to the component carrier”.
  • the conditions for the base station apparatus to start carrier aggregation are not particularly defined in the present invention, but the base station uses the measurement report (measurement report) and buffer status report (buffer status report) of the mobile station apparatus 400 as a judgment material. It is desirable for the device to determine its need.
  • the mobile station apparatus 400 of FIG. 5 is connected to the component carrier CC3 from the component carrier CC1 by carrier aggregation and performs transmission / reception processing (step S1).
  • the mobile station device 400 Prior to receiving the MBMS service, acquires MBMS service information (MBMS information 1 to 3) provided by downlink component carriers connected to the base station device for each downlink component carrier. (Steps S2 to S4).
  • the MBMS service information includes MBSFN subframe information such as the MBSFN subframe arrangement pattern and multicast data identifiers such as MBSFN-ID.
  • the mobile station apparatus 400 receives at least the MBSFN subframe arrangement pattern for each component carrier in the MBMS service, regardless of whether or not the MBMS service of interest is provided after the start of carrier aggregation.
  • the base station apparatus may collectively transmit peripheral MBMS information. In this case, the mobile station apparatus 400 may receive MBMS information from any one component carrier.
  • the mobile station apparatus 400 performs reception MBMS selection processing, and selects which component carrier's MBMS service is to be received (step S5). Then, in order to notify base station apparatus 300 that the selected component carrier is to receive the MBMS service, the MBMS reception participation information is transmitted, and the uplink component carrier corresponding to the downlink component carrier that transmits the MBMS service to be received. It transmits to the base station apparatus 300 using a carrier (step S6). After transmitting the MBMS reception participation information, the mobile station device 400 starts receiving the MBMS service (step S7).
  • the mobile station apparatus 400 shows an example in which it is determined to receive the MBMS service provided by the component carrier CC2, but naturally, the MBMS reception participation information is determined according to the selected component carrier.
  • the transmission destination (uplink component carrier) is changed.
  • the MBMS reception participation information is transmitted as an upper layer message (RRC message or NAS message), and includes the MBSFN-ID and mobile station apparatus ID that have started reception.
  • mobile station apparatus 400 does not receive a downlink reference signal in an OFDM symbol in which multicast data is transmitted in an MBSFN subframe indicated by MBMS information for each component carrier.
  • FIG. 6 is a flowchart showing details of the reception MBMS selection process of the mobile station apparatus 400 in FIG.
  • the mobile station apparatus 400 confirms the content of the MBMS information acquired for each downlink component carrier (step S10). Specifically, the MBMS service provided by each component carrier is grasped based on the acquired MBSFN-ID, and the component carrier providing the MBMS service that the mobile station apparatus 400 is interested in (receives) It selects as a component carrier which receives a service (step S11).
  • the MBMS service that the mobile station device 400 is interested in is set in the upper layer in advance by a user operation or the like.
  • MBSFN-ID # 1 (MBMS service # 1) is used on component carrier CC1
  • MBSFN-ID # 2 (MBMS service # 2) is used on component carrier CC2
  • MBSFN-ID # 3 (MBMS service # 3) is used on component carrier CC3.
  • the mobile station apparatus 400 selects the component carrier CC2.
  • the mobile station device 400 selects any one of them.
  • FIG. 7 is another sequence chart when carrier aggregation is performed at a plurality of frequencies providing the MBMS service.
  • the terms used in FIG. 7 are the same as those in FIG.
  • the mobile station device 400 starts receiving the MBMS service (step S20).
  • the mobile station apparatus 400 during carrier aggregation receives the MBMS service provided by the component carrier CC1 (step S21).
  • the base station apparatus 400 determines that the carrier aggregation configuration is changed (step S22) and the connection with the component carrier receiving the MBMS service is released (released), that is, the component carrier CC1 is
  • the mobile station apparatus 400 provides the downlink component carriers (component carriers 2 and 3) received after the carrier aggregation configuration change in order to continue the MBMS service.
  • MBMS service information (MBMS information 2 and 3) to be obtained is acquired from the base station apparatus for each downlink component carrier (steps S23 and S24).
  • the mobile station apparatus 400 performs reception MBMS reselection processing, and selects which component carrier's MBMS service is to be received (step S25). Then, in order to notify base station apparatus 300 that the selected component carrier is to receive the MBMS service, the uplink component carrier corresponding to the downlink component carrier that transmits the MBMS service that receives the MBMS reception participation information. Is transmitted to the base station apparatus (step S26). After transmitting the MBMS reception participation information, the mobile station device 400 starts receiving the MBMS service (step S27). In the example shown in FIG. 7, the mobile station apparatus 400 shows an example in which it is determined to receive the MBMS service provided by the component carrier CC2, but of course, the MBMS reception participation information is determined according to the selected component carrier. The transmission destination (uplink component carrier) is changed.
  • FIG. 8 is a flowchart showing details of the reception MBMS reselection process of the mobile station apparatus 400 in FIG.
  • the mobile station apparatus 400 confirms the content of the MBMS information acquired for each component carrier (step S31). Specifically, the MBMS service provided by each component carrier is grasped based on the acquired MBSFN-ID, and the component carrier that provides the MBMS service that the mobile station apparatus is interested in (receives) is designated as the MBMS service. Is selected as a component carrier to receive (step S32).
  • the MBMS service that the mobile station device 400 is interested in is set in the upper layer in advance by a user operation or the like.
  • MBSFN-ID # 1 (MBMS service # 1) on component carrier CC1
  • MBSFN-ID # 1 (MBMS service # 1) on component carrier CC2
  • MBSFN-ID # 3 (MBMS service # 3) on component carrier CC3.
  • the mobile station apparatus reselects the component carrier CC2 in order to continue the MBMS service.
  • the mobile station apparatus selects any one of them.
  • FIG. 9 is a diagram showing a component carrier for notifying MBMS reception participation information.
  • DL_CC1 and DL_CC2 correspond to UL_CC1
  • DL_CC3 and DL_CC4 correspond to UL_CC2.
  • the mobile station apparatus that receives the MBMS service provided by DL_CC4 transmits MBMS reception participation information by the corresponding UL_CC2. It is also possible to transmit the MBMS reception participation information on an arbitrary uplink component carrier including the identifier of the downlink component carrier that receives the MBMS service in the MBMS reception participation information.
  • the identifier of the downlink component carrier is a cell ID, a frequency ID (FID; Frequency ID), or a cell global ID.
  • the mobile station apparatus selects only the component carrier that provides the MBMS service that is of interest, even if a plurality of component carriers that provide the MBMS service are received by carrier aggregation. If received, sufficient MBMS service is provided, so that MBMS service can be received efficiently and power consumption is reduced. In addition, when a plurality of component carriers that provide an MBMS service are received by carrier aggregation and the connection of the receiving component carrier is released, the component that provides the MBMS service of interest If the carrier is selected again and received, the MBMS service can be continued.
  • the mobile station apparatus is connected to a plurality of component carriers providing an MBMS service by carrier aggregation, and an MBMS service of interest is provided by a plurality of component carriers.
  • the mobile station apparatus receives the MBMS service on the component carrier with the best reception quality.
  • a downlink reference signal (DL-RS) or an MBSFN reference signal (MBSFN-RS) can be used as a measurement target.
  • DL-RS downlink reference signal
  • MBSFN-RS MBSFN reference signal
  • the mobile station apparatus determines the component carrier having the best reception quality, and selects or reselects the component carrier that receives the MBMS service.
  • the mobile station apparatus When a mobile station apparatus starts receiving a new MBMS service from a state where it is connected to a plurality of component carriers by carrier aggregation, the mobile station apparatus has the highest reception quality from the component carrier providing the MBMS service of interest. Choose a good component carrier.
  • the mobile station apparatus when the mobile station apparatus is connected to a plurality of component carriers by carrier aggregation while receiving the MBMS service, the mobile station apparatus has the best reception quality from the component carrier that provides the MBMS service of interest. Reselect the component carrier.
  • the mobile station apparatus when the mobile station apparatus receives the MBMS service, if the reception quality of the component carrier receiving the MBMS service deteriorates and falls below a certain threshold value, the mobile station apparatus provides an interesting MBMS service. A component carrier having the best reception quality is selected again from another component carrier.
  • the reception quality of the component carrier receiving the MBMS service is determined from the reception quality of another component carrier providing the MBMS service of interest. If the value falls below the value of, the component carrier is reselected.
  • the mobile station apparatus when the mobile station apparatus receives the MBMS service and the connection with the component carrier receiving the MBMS service is released according to the instruction of the base station apparatus, the mobile station apparatus provides the MBMS service of interest. A component carrier having the best reception quality is reselected from other component carriers.
  • the mobile station apparatus receives the MBMS service
  • the mobile station apparatus provides an interesting MBMS service.
  • the reception quality measurement of another component carrier is started, and the reception quality of the receiving component carrier falls below the reception quality of another component carrier providing the MBMS service of interest by a predetermined value, It is also possible to reselect the component carrier.
  • an offset value for each component carrier may be added to the reception quality.
  • the mobile station apparatus receives the highest reception quality from the component carrier that provides the interested MBMS service. If only a good component carrier is selected and received, a sufficient MBMS service is provided, so that the MBMS service can be received efficiently and power consumption is reduced.
  • the component that provides the MBMS service of interest The MBMS service can be continued by reselecting and receiving the component carrier having the best reception quality from the carrier.
  • the mobile station apparatus arranged in the mixed cell needs to acquire MBSFN subframe arrangement information from the MBMS information, and measure the downlink reference signal and the MBSFN reference signal separately. Therefore, a mobile station apparatus that performs carrier aggregation needs to acquire MBMS information for each of a plurality of component carriers, and perform reception control of different reference signals for each component carrier based on the MBMS information.
  • the base station apparatus transmits common pattern identification information indicating whether or not the MBSFN subframe arrangement pattern of each component carrier can be commonly used among a plurality of component carriers to the mobile station apparatus. It should be noted that the common pattern identification information does not include specific MBMS service information. The mobile station apparatus efficiently receives the downlink reference signal and the MBSFN reference signal based on the common pattern identification information.
  • This common pattern identification information is preferably notified to all mobile station devices by broadcast information regardless of whether or not the MBMS service is received, but is transmitted individually for each mobile station device using an upper layer message. It is also possible. When an upper layer message is used, the mobile station apparatus that has received the common pattern identification information starts measurement of the specified component carrier based on the common pattern identification information regardless of the reception quality of the connected component carrier. .
  • the common pattern identification information transmitted by the base station apparatus uses one of the following methods.
  • an encoded identification code prepared for each cell indicating the same MBSFN subframe arrangement pattern as the component carrier to which all designated cells are connected is used.
  • an encoded identification code prepared for each frequency indicating whether or not all designated frequencies are the same MBSFN subframe arrangement pattern as the connected component carrier is used.
  • the identification code to be encoded is, for example, 1 bit. Note that the base station apparatus can also implicitly indicate whether the MBSFN subframe arrangement pattern can be commonly used by not transmitting the common pattern identification information.
  • the mobile station apparatus can determine from the common pattern identification information whether the MBSFN subframe arrangement pattern can be commonly used in the component carrier, the mobile station apparatus receives the downlink reference signal and the MBSFN reference signal. It becomes possible to carry out efficiently and power consumption is reduced.
  • the characteristic operation of the present invention can be realized by causing a computer to execute a control program. That is, the control program of the present invention is connected to a base station apparatus using a plurality of frequency bands, and is transmitted from the base station apparatus by an MBSFN (Multimedia Broadcast Multicast Service over Single Frequency ⁇ ⁇ Network) subframe and unit.
  • MBSFN Multimedia Broadcast Multicast Service over Single Frequency ⁇ ⁇ Network
  • a control program for a mobile station apparatus that receives a time-multiplexed frame of unicast subframes used in cast transmission and receives MBMS (Multimedia Broadcast Multicast Service), wherein the control unit provides the MBMS service.
  • MBMS Multimedia Broadcast Multicast Multicast Service
  • processing for identifying the MBSFN subframe and the unicast subframe for each frequency band, and a multicast data reception processing unit connected to the base station apparatus using a plurality of frequency bands Provide the MBMS service in the state
  • a process of acquiring information of the MBMS service provided for each frequency band, and a process of selecting any one frequency band that receives the provision of the MBMS service from the plurality of frequency bands in the multicast data reception processing unit And a receiving unit that receives multicast data transmitted in the MBSFN subframe of the selected frequency band, and a transmitting unit that transmits information indicating the selected frequency band to the base station apparatus.
  • a series of processes including the above are converted into commands that can be read and executed by a computer.
  • the MBMS service information provided for each frequency band is acquired and the MBMS service is obtained from the plurality of frequency bands. Since one of the frequency bands to be provided is selected and multicast data transmitted in the MBSFN subframe of the selected frequency band is received, the MBMS service can be efficiently performed in a state where a plurality of frequency bands are being received. It becomes possible to receive.
  • the function of each unit of the mobile station apparatus and the base station apparatus or a program for realizing a part of these functions is recorded on a computer-readable recording medium and recorded on the recording medium.
  • the mobile station apparatus or the base station apparatus may be controlled by causing the computer system to read and execute the program.
  • 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.
  • a server that holds a program for a certain time such as a volatile memory inside a computer system that serves as a server or client.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
  • each functional block used in each of the above embodiments may be realized as an LSI that is typically an integrated circuit.
  • Each functional block may be individually formed into chips, or a part or all of them may be integrated into a chip.
  • the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • an integrated circuit based on the technology can be used.

Abstract

Selon l'invention, lorsqu'un appareil de station mobile, qui peut utiliser une pluralité de fréquences pour se connecter à un appareil de station de base, reçoit l'un quelque de services MBMS, l'appareil de station mobile est autorisé à recevoir de manière efficace un service MBMS intéressé parmi les services MBMS. Un appareil de station mobile comprend : une unité de commande (411) qui distingue entre une sous-trame MBSFN et une sous-trame d'unidiffusion pour chacune d'une pluralité de bandes de fréquence, indépendamment du point de savoir si ou non recevoir la fourniture de l'un quelconque des services MBMS ; une unité de traitement de réception de données de multidiffusion (405) qui, lorsque la fourniture de l'un quelconque des services MBMS doit être reçue avec la pluralité de bandes de fréquence utilisées pour se connecter avec un appareil de station de base, acquiert des informations du service MBMS fourni pour chacune de la pluralité de bandes de fréquence et sélectionne celle de la pluralité de bandes de fréquence pour recevoir la fourniture du service MBMS correspondant ; une unité de réception (401) qui reçoit des données de multidiffusion transmises dans la sous-trame MBSFN de la bande de fréquence sélectionnée ; et une unité d'émission (409) qui transmet, à l'appareil de station de base, des informations indiquant la bande de fréquence sélectionnée.
PCT/JP2010/056063 2009-04-23 2010-04-02 Appareil de station mobile, appareil de station de base, système de communication, procédé de réception et programme de commande WO2010122892A1 (fr)

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JP2009-105568 2009-04-23
JP2009105568 2009-04-23

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Publication number Priority date Publication date Assignee Title
JP2014523196A (ja) * 2011-07-07 2014-09-08 クゥアルコム・インコーポレイテッド ピアツーピアネットワークにおける優先ブロードキャストとユニキャストとの共存
WO2016042979A1 (fr) * 2014-09-18 2016-03-24 ソニー株式会社 Dispositif
US11178613B2 (en) 2011-09-30 2021-11-16 Apple Inc. Multicast/broadcast service continuity in multi-carrier networks

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WO2005079097A1 (fr) * 2004-02-13 2005-08-25 Mitsubishi Denki Kabushiki Kaisha Systeme de communication, dispositif de communication, terminal de communication et methode de communication
JP2008512038A (ja) * 2004-09-15 2008-04-17 サムスン エレクトロニクス カンパニー リミテッド マルチメディアブロードキャスト／マルチキャストサービスシステムにおいて周波数階層収束を用いる端末のためのハードハンドオーバー方法及び装置
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WO2005079097A1 (fr) * 2004-02-13 2005-08-25 Mitsubishi Denki Kabushiki Kaisha Systeme de communication, dispositif de communication, terminal de communication et methode de communication
JP2008512038A (ja) * 2004-09-15 2008-04-17 サムスン エレクトロニクス カンパニー リミテッド マルチメディアブロードキャスト／マルチキャストサービスシステムにおいて周波数階層収束を用いる端末のためのハードハンドオーバー方法及び装置
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JP2014523196A (ja) * 2011-07-07 2014-09-08 クゥアルコム・インコーポレイテッド ピアツーピアネットワークにおける優先ブロードキャストとユニキャストとの共存
US11178613B2 (en) 2011-09-30 2021-11-16 Apple Inc. Multicast/broadcast service continuity in multi-carrier networks
WO2016042979A1 (fr) * 2014-09-18 2016-03-24 ソニー株式会社 Dispositif
US10517008B2 (en) 2014-09-18 2019-12-24 Sony Corporation Apparatus
EP3767972B1 (fr) * 2014-09-18 2023-11-29 Sony Group Corporation Appareil et procédé pour une réception multicast améliorée

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