WO2014006936A1 - 送信装置、受信装置、送信方法、受信方法 - Google Patents

送信装置、受信装置、送信方法、受信方法 Download PDF

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Publication number
WO2014006936A1
WO2014006936A1 PCT/JP2013/057809 JP2013057809W WO2014006936A1 WO 2014006936 A1 WO2014006936 A1 WO 2014006936A1 JP 2013057809 W JP2013057809 W JP 2013057809W WO 2014006936 A1 WO2014006936 A1 WO 2014006936A1
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Prior art keywords
active state
serving cells
unit
transmission data
state information
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English (en)
French (fr)
Japanese (ja)
Inventor
自然 佐々木
賢吾 桶谷
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NEC Corp
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NEC Corp
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Priority to JP2014523619A priority Critical patent/JP5871066B2/ja
Priority to US14/407,671 priority patent/US9713021B2/en
Priority to IN10347DEN2014 priority patent/IN2014DN10347A/en
Priority to EP13813753.4A priority patent/EP2869651A4/en
Publication of WO2014006936A1 publication Critical patent/WO2014006936A1/ja
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0466—Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present invention relates to a transmission device, a reception device, a transmission method, and a reception method.
  • LTE-Advanced is generally known as an extension of LTE (Long Term Evolution), which is a wireless communication method defined by 3GPP (Third Generation Partnership Project).
  • Carrier aggregation is a method in which one mobile station performs uplink or downlink communication using a plurality of carriers at the same time.
  • Each of a plurality of carriers used at the time of carrier aggregation is called a component carrier (CC: Component Carrier).
  • a serving cell a cell that is connected to a mobile station and can be used for communication.
  • the serving cells the first set when the mobile station connection is established is called the primary serving cell (PCell: Primary Serving Cell), and the one set after the connection establishment is called the secondary serving cell (SCell: Secondary Serving Cell).
  • PCell Primary Serving Cell
  • SCell Secondary Serving Cell
  • the mobile station can switch the state of each SCell to an active state or an inactive state.
  • the mobile station does not perform uplink communication using an inactive SCell, performs quality measurement for the inactive SCell, reports channel state information (CSI) to the base station, Also, the physical downlink control channel (PDCCH: Physical Downlink Control Channel) is not monitored.
  • CSI channel state information
  • PDCCH Physical Downlink Control Channel
  • the first method for switching the active SCell to the inactive state.
  • the first method is to transmit a MAC (Media Access Control) control element for deactivation by the base station to the mobile station.
  • MAC Media Access Control
  • the second method is that there is no allocation of uplink or downlink communication resources using the PDCCH to the mobile station before the timer for each SCell in the mobile station expires.
  • the mobile station When there is no resource allocation before the timer for a certain SCell expires, the mobile station similarly changes the state of the SCell to the inactive state.
  • the method of switching an inactive SCell to an active state is that the base station transmits a MAC control element instructing activation.
  • the mobile station receives a MAC control element instructing activation of a certain SCell, the mobile station changes the state of the SCell to the active state.
  • the main purpose provided with the second method (deactivation due to timer expiration) is to be transmitted by the first method. This is for protection when the MAC control information received by the mobile station cannot be received correctly.
  • the mobile station continues to recognize the SCell as being in an active state, while the base station is in an inactive state. There is a possibility that a recognition mismatch between the base station and the mobile station occurs.
  • the second method is prepared, and the second method eliminates a discrepancy in recognition of the state of the SCell between the base station and the mobile station after a predetermined time elapses (timer expires). Is possible.
  • the mobile station autonomously transitions to the inactive state during the period when the base station recognizes the active state.
  • a recognition mismatch occurs between the base station and the mobile station.
  • the base station uses the PDCCH to instruct a certain SCell to allocate communication resources, depending on the reception quality of the mobile station, there is a possibility that the reception of the PDCCH may fail and the communication resources for that SCell may not be allocated.
  • the mobile station switches the SCell to an inactive state.
  • the base station recognizes the active state, but the mobile station recognizes the inactive state, so that the SCell state recognition mismatch occurs.
  • a mobile station can transmit CSI for up to 5 serving cells on one serving cell in Aperiodic CSI transmission.
  • CSI includes channel quality information (CQI: Channel Quality Indicator), precoding matrix information (PMI: Pre-coding Matrix Indicator), and rank information (RI: Rank Indicator).
  • each serving cell is assigned a serving cell index that is unique within the mobile station.
  • the serving cell index of PCell is always 0.
  • Non-Patent Document 4 CQI / PMI and RI of each serving cell are concatenated in order of serving cell index and transmitted on one serving cell. At this time, the CQI / PMI or RI of the serving cell in the inactive state is not connected.
  • Non-Patent Document 4 when the total number of CQI / PMI bits connected as described above is 12 or more, an 8-bit cyclic redundancy check (CRC: Cyclic Redundancy) is performed on the connected CQI / PMI. (Check) code is added to enable error detection. On the other hand, in the case of 11 bits or less, no CRC code is added and error detection is impossible.
  • CRC Cyclic Redundancy
  • 3GPP “3GPP TS36.321 v10.4.0,” Dec. 2011.
  • 3GPP “3GPP TS36.213 v10.4.0,” Dec. 2011.
  • 3GPP “3GPP TS36.331 v10.4.0,” Dec. 2011.
  • 3GPP “3GPP TS36.212 v10.4.0,” Dec. 2011.
  • a recognition mismatch occurs between the base station and the mobile station with respect to the state of each serving cell, a recognition mismatch also occurs between the base station and the mobile station with respect to the total sequence length of CQI / PMI and RI.
  • the connected CQI / PMI and RI itself do not have active state information indicating whether or not each serving cell is in an active state. Therefore, when the above-described recognition mismatch occurs, it is necessary for the base station side to determine which serving cell CQI / PMI and RI are connected.
  • the number of bits of the concatenated CQI / PMI is 12 or more, a CRC code is added, and the error of the whole concatenated CQI / PMI can be detected on the base station side.
  • the CQI / PMI sequence length of each serving cell is equal among a plurality of serving cells, it is not possible on the base station side to identify which serving cell CQI / PMI is connected.
  • the base station first attempts decoding based on the active state information of each immediately preceding serving cell assuming that the concatenated CQI / PMI sequence length is 4 O a .
  • this assumed sequence length is different from the actually transmitted sequence length 3 O a , the CRC confirmation result is invalid.
  • decoding is attempted assuming that the concatenated CQI / PMI sequence length is 3 O a .
  • the first problem of the related configuration is which serving cell combination is the CQI / PMI concatenated on the mobile station side when there is a mismatch in recognition of the status of each serving cell between the base station and the mobile station. Cannot be uniquely identified on the base station side, and the connected CQI / PMI cannot be correctly separated for each serving cell. Therefore, CQI / PMI is discarded as indefinite information, and communication resources are wasted.
  • the second problem of the related configuration is that the active state information of each serving cell cannot be explicitly shared between the base station and the mobile station. Therefore, state control and communication resource allocation by the base station are performed inefficiently based on an incorrect serving cell state.
  • an object of the present invention is to provide a technique capable of solving any of the above-described problems.
  • the transmission device of the present invention includes: A concatenation unit that concatenates transmission data of each of a plurality of serving cells; An adding unit that generates a transmission sequence by adding active state information indicating whether or not each of the plurality of serving cells is in an active state to the connected transmission data; A transmission unit that transmits the generated transmission sequence.
  • the receiving apparatus of the present invention is A transmission apparatus in which transmission data of each of a plurality of serving cells are concatenated and active state information indicating whether or not each of the plurality of serving cells is in an active state is added to the concatenated transmission data.
  • the transmission method of the present invention includes: A transmission method by a transmission device, Concatenate each transmission data of multiple serving cells, To the concatenated transmission data, generate a transmission sequence by adding active state information indicating whether or not each of the plurality of serving cells is in an active state, The generated transmission sequence is transmitted.
  • the receiving method of the present invention includes: A receiving method by a receiving device, A transmission apparatus, wherein transmission data of each of a plurality of serving cells are concatenated and active state information indicating whether each of the plurality of serving cells is in an active state is added to the concatenated transmission data Received from Based on the received transmission sequence, restore active state information of each of the plurality of serving cells, Based on the restored active state information of each of the plurality of serving cells, the transmission data of each of the plurality of serving cells is separated from the connected transmission data.
  • the transmission device adds the active state information of each of the plurality of serving cells to the concatenated transmission data for transmission.
  • the receiving apparatus can grasp the state of each serving cell recognized by the transmitting apparatus by restoring the active state information, an effect that the connected transmission data can be correctly separated for each serving cell is obtained.
  • FIG. 2 is a block diagram showing a configuration of a CQI / PMI generating unit 200 according to the first embodiment of the present invention. Note that the CQI / PMI generating unit 200 is provided in a transmission device (in this embodiment, a mobile station).
  • the CQI / PMI generation unit 200 shown in FIG. 2 includes a scrambling code identifier conversion unit 201, a scrambling code generation unit 203, a scrambling unit 205, a CQI / PMI connection unit 207, and a CRC generation unit 209. Have.
  • a scrambling code identifier conversion unit 201, a scrambling code generation unit 203, and a scrambling unit 205 constitute an adding unit.
  • the scrambling code identifier conversion unit 201 receives serving cell information held by the mobile station as input, converts the serving cell state into a scrambling code identifier, and outputs it to the scrambling code generation unit 203.
  • the scrambling code generation unit 203 receives the scrambling code identifier output from the scrambling code identifier conversion unit 201, generates a scrambling code, and outputs the scrambling code to the scrambling unit 205.
  • the CQI / PMI concatenation unit 207 receives the serving cell information held by the mobile station and the CQI / PMI of each serving cell, and based on the serving cell information, concatenates the CQI / PMI of the active serving cell in the serving cell index order, and the scrambling unit The data is output to 205 and the CRC generation unit 209.
  • the CRC generation unit 209 receives the connected CQI / PMI output from the CQI / PMI connection unit 207 as an input, and generates and outputs a CRC code.
  • the scrambling unit 205 receives the scrambling code output from the scrambling code generation unit 203 and the concatenated CQI / PMI output from the CQI / PMI concatenation unit 207, and uses the scrambling code. Then, scrambling is performed on the concatenated CQI / PMI, and a CQI / PMI transmission sequence is output.
  • FIG. 3 is a block diagram showing a configuration of the CQI / PMI decoding unit 300 according to the first embodiment of the present invention. Note that CQI / PMI decoding section 300 is provided in a receiving apparatus (a base station in the present embodiment).
  • CQI / PMI decoding section 300 shown in FIG. 3 includes decoding section 301, scrambling code identifier conversion section 201, scrambling code generation section 203, scrambling section 205, CQI / PMI separation section 303, and serving cell information.
  • a control unit 305 and a CRC confirmation unit 307 are included.
  • a decoding unit 301, a scrambling code identifier conversion unit 201, a scrambling code generation unit 203, a scrambling unit 205, a serving cell information control unit 305, and a CRC confirmation unit 307 constitute a restoration unit.
  • the decoding unit 301 includes a reception sequence received from the mobile station (CQI / PMI reception sequence corresponding to the above CQI / PMI transmission sequence, or a CQI / PMI reception sequence with a CRC code added), and a serving cell information control unit
  • the serving cell information output from 305 is used as an input, and the CQI / PMI received sequence (or CRC in the CQI / PMI received sequence) is calculated after calculating the CQI / PMI sequence length in the received sequence based on the serving cell information.
  • the code added is decoded and output to the scrambling section 205.
  • the scrambling code identifier conversion unit 201, the scrambling code generation unit 203, and the scrambling unit 205 have the same functions as the blocks with the same reference numerals in FIG.
  • the scrambling code identifier conversion unit 201 receives the serving cell information output from the serving cell information control unit 305, converts the serving cell state into a scrambling code identifier, and outputs the scrambling code generator 203 to the scrambling code generation unit 203.
  • the scrambling code generation unit 203 receives the scrambling code identifier output from the scrambling code identifier conversion unit 201, generates a scrambling code, and outputs the scrambling code to the scrambling unit 205.
  • the scrambling unit 205 includes a scrambling code output from the scrambling code generation unit 203 and a CQI / PMI reception sequence output from the decoding unit 301 (or a CRC code added to the CQI / PMI reception sequence) , And scrambling the CQI / PMI reception sequence using the scrambling code, and outputs the concatenated CQI / PMI sequence candidates to the CQI / PMI separation unit 303 and the CRC confirmation unit 307.
  • a CRC code is added to the CQI / PMI reception sequence
  • the CRC code is added to the concatenated CQI / PMI sequence candidate that is output to CRC check section 307.
  • the CQI / PMI separation unit 303 receives the concatenated CQI / PMI sequence candidate output from the scrambling unit 205 and the serving cell information output from the serving cell information control unit 305, and based on the serving cell information Then, the CQI / PMI of the serving cell in the active state is separated from the concatenated CQI / PMI sequence candidates in order of serving cell index, and the CQI / PMI of each serving cell is output.
  • CRC confirmation section 307 receives the concatenated CQI / PMI sequence candidate output from scrambling section 205 as input, performs CRC confirmation on the concatenated CQI / PMI sequence candidate, and provides the CRC confirmation result as serving cell information Output to the control unit 305.
  • the serving cell information control unit 305 receives the CRC confirmation result output from the CRC confirmation unit 307 as input, and restores the serving cell information of the mobile station based on the CRC confirmation result. Specifically, the serving cell information control unit 305 sequentially changes and outputs the serving cell information candidates until the CRC confirmation result is correct, and the serving cell information candidate when the CRC confirmation result is correct is restored to the restored mobile station. Serving cell information.
  • FIG. 4 is a block diagram illustrating a configuration of the mobile station 400 according to the first embodiment of this invention.
  • a CQI / PMI generation unit 200 includes a CQI / PMI generation unit 200, an encoding unit 401, a transmission unit 403, a radio control unit 405, and an antenna 407.
  • the CQI / PMI generation unit 200 uses the CQI / PMI generation unit 200 of FIG.
  • the CQI / PMI generation unit 200 receives the CQI / PMI and serving cell information of each serving cell held by the mobile station 400, and outputs the CQI / PMI transmission sequence and CRC code to the encoding unit 401.
  • the encoding unit 401, the transmission unit 403, the radio control unit 405, and the antenna 407 are well known to those skilled in the art and are not directly related to the present invention, the detailed illustration and description thereof are omitted. Also, other blocks that perform processing unique to the mobile station are not characteristic features of the present invention, and are therefore omitted from FIG.
  • FIG. 5 is a block diagram showing the configuration of the base station 500 according to the first embodiment of the present invention.
  • the base station 500 shown in FIG. 5 includes a CQI / PMI decoding unit 300, a receiving unit 501, a radio control unit 503, and an antenna 505.
  • the CQI / PMI decoding unit 300 uses the CQI / PMI decoding unit 300 of FIG.
  • the CQI / PMI decoding unit 300 receives the reception sequence received from the mobile station 400 and the serving cell information held by the base station 500, and outputs CQI / PMI and serving cell information of each serving cell.
  • the receiver 501, the radio controller 503, and the antenna 505 are well known to those skilled in the art and are not directly related to the present invention, and thus detailed illustration and description thereof are omitted. Other blocks that perform processing unique to the base station are omitted from FIG. 5 because they are not characteristic features of the present invention.
  • This embodiment is characterized by scrambling the CQI / PMI sequence.
  • Scrambling refers to obtaining a new sequence by taking the exclusive OR of the sequence and the scrambling code.
  • the scrambled sequence is scrambled using the same scrambling code, the original sequence is restored.
  • the mobile station 400 scrambles the concatenated CQI / PMI sequence using a scrambling code corresponding to the serving cell information.
  • the base station 500 uses the same scrambling code to restore the CRC confirmation result unless the original CQI / PMI sequence is restored. . Therefore, when the CRC confirmation result is correct, it can be considered that the serving cell information matches between the base station 500 and the mobile station 400.
  • FIG. 6 is a flowchart illustrating a CQI / PMI generation procedure in the mobile station 400 of the present embodiment.
  • step S601 the CQI / PMI connecting unit 207 determines an active serving cell based on the serving cell information held by the mobile station 400, and determines the CQI / PMI of the active serving cell as the serving cell. Concatenates in index order.
  • the CQI / PMI of the serving cell whose serving cell index is n is
  • articulated CQI / PMI series o x can be expressed as follows.
  • step S603 the determination unit (not shown), the sequence length of the articulated CQI / PMI series o x is equal to or more than 12 bits. This determination result is notified to each block in the mobile station 400. This determination may be performed by the scrambling unit 205 or the CRC generation unit 209.
  • step S615 the scrambling unit 205, the articulated CQI / PMI series o x directly output, the encoding unit 401, the block coding of articulated CQI / PMI series o x Do.
  • the following processing is performed.
  • step S605 CRC generator 209 generates and outputs the 8-bit CRC code for concatenated CQI / PMI series o x.
  • the scrambling code identifier conversion unit 201 converts the serving cell information to scrambling code identifier c scr, determining c scr.
  • the scrambling code identifier is a parameter for generating a scrambling code, and is a value corresponding to the serving cell information on a one-to-one basis.
  • the state a (n) of the serving cell whose serving cell index is n is defined as follows.
  • the scrambling code identifier c scr can be defined as follows, for example.
  • N cell represents the total number of serving cells .
  • the state of each serving cell corresponds to each digit of the binary number, and a unique scrambling code identifier c scr is generated.
  • the scrambling code generation unit 203 generates a scrambling code c (x) corresponding to the scrambling code identifier c scr .
  • Any scrambling code may be used as long as different sequences correspond to different scrambling code identifiers. However, from the standpoint of error resilience, it is desirable to have a large intersymbol distance between selectable scrambling codes. Examples of sequences having such properties include M sequences, Gold sequences, Reed-Muller codes, Hadamard codes, and the like. In the following, an example of scrambling code generation using M-sequence will be given as an example.
  • N is an adjustable parameter indicating the number of shift stages of the scrambling code generation unit 203, and the scrambling code period is 2 N -1. Also,
  • N m represents the number of terms of the generator polynomial.
  • the scrambling code identifier c scr is set as the initial output of the scrambling code, and a unique sequence for c scr is generated.
  • step S611 the scrambling unit 205, using a scrambling code c (x), performs scrambling with respect articulated CQI / PMI series o x, the following CQI / PMI transmission sequence o x 'Is output.
  • step S613 the encoding unit 401 adds a CRC code to the CQI / PMI transmission sequence o x ′ and performs convolutional encoding.
  • step S613 or S615 is then transmitted to base station 500 via transmission section 403, radio control section 405, and antenna 407.
  • FIG. 7 is a flowchart illustrating a CQI / PMI decoding procedure in the base station 500 of the present embodiment. 7, it is assumed that a sequence encoded and transmitted by mobile station 400 by the method of FIG. 6 is received by receiving section 501 as a received sequence. In FIG. 7, the same steps as those in FIG. 6 are denoted by the same reference numerals.
  • serving cell information control section 305 stores serving cell information b (n) in mobile station 400 held by base station 500 as temporary variable a temp (n).
  • decoding section 301 determines sequence length O temp of the connected CQI / PMI sequence based on a temp (n), and determines whether the sequence length is 12 bits or more. This determination result is notified to each block in base station 500.
  • step S703 the decoding unit 301 performs decoding processing of the received sequence is a block code, in step S711, CQI / PMI separation unit 303, based on a temp (n), the active state The serving cell CQI / PMI is separated in order of serving cell index, and the CQI / PMI of each serving cell is output. On the other hand, in the case of 12 bits or more, the following processing is performed.
  • step S705 the decoding unit 301 performs a decoding process on a reception sequence that is a convolutional code.
  • the CQI / PMI sequence decoded here is output to scrambling section 205.
  • step S607 the scrambling code identifier conversion unit 201 determines the scrambling code identifier based on a temp (n).
  • step S609 the scrambling code generation unit 203 generates a scrambling code using Equation 7.
  • step S611 the scrambling unit 205
  • step S707 the CRC checking unit 307 determines the connected CQI / PMI sequence candidates.
  • the serving cell information control unit 305 stores a temp (n) as serving cell information b (n) held by the base station, updates b (n), and notifies CQI / PMI. Notify the separation unit 303.
  • the CQI / PMI separation unit 303 based on the updated b (n), the concatenated CQI / PMI sequence candidates
  • CQI / PMI of each serving cell is separated in order of serving cell index, and CQI / PMI of each serving cell is output.
  • the serving cell information control unit 305 determines whether or not all patterns of the serving cell set in advance have been tried. If all patterns have been tried, the correct CQI / PMI cannot be obtained and the CQI / PMI decoding process is terminated. When there is an untried pattern, the serving cell information control unit 305 changes the temporary serving cell information a temp (n) and performs the processing from step S701 again. Examples of changes in a temp (n), include changing temporarily inactive one of the serving cell in the active state at a temp (n).
  • the mobile station 400 adds serving cell information by scrambling the connected CQI / PMI using a scrambling code corresponding to the serving cell information.
  • the base station 500 can grasp the state of each serving cell recognized by the mobile station 400 by restoring the serving cell information, it is possible to correctly separate the connected CQI / PMI for each serving cell. .
  • CQI / PMI that is discarded as indefinite information in the related configuration can be newly used, and communication resources can be used efficiently.
  • the effect that the active state information of each serving cell can be explicitly shared between the base station 500 and the mobile station 400 is obtained. Therefore, the active state control and communication resource allocation by the base station 500 can be efficiently performed based on the correct serving cell state.
  • scrambling is used as a method for adding serving cell information, there is an effect that serving cell information can be added without increasing the CQI / PMI sequence length.
  • Second Embodiment In the first embodiment, scrambling is used as a method for adding serving cell information. However, in this embodiment, a cyclic shift is used.
  • the mobile station 400 After generating the CRC code, the mobile station 400 converts the serving cell information into a cyclic shift amount, and then cyclically shifts the concatenated CQI / PMI according to the cyclic shift amount.
  • the base station 500 performs reverse cyclic shift so that the CRC check result is correct, and obtains the serving cell information of the mobile station 400 from the cyclic shift amount when the CRC check result is correct.
  • FIGS. 8 and 9 are block diagrams showing configurations of the CQI / PMI generating unit 800 and the CQI / PMI decoding unit 900 according to the second embodiment of the present invention, respectively.
  • a CQI / PMI generation unit 800 shown in FIG. 8 is different from the CQI / PMI generation unit 200 of the first embodiment shown in FIG. 2 in that a scrambling code identifier conversion unit 201, a scrambling code generation unit 203, and a scrambling The unit 205 is replaced with a cyclic shift amount conversion unit 801 and a cyclic shift unit 803.
  • the cyclic shift amount conversion unit 801 and the cyclic shift unit 803 constitute an addition unit.
  • the CQI / PMI decoding unit 900 shown in FIG. 9 is different from the CQI / PMI decoding unit 300 of the first embodiment shown in FIG. 3 in the scrambling code identifier conversion unit 201, the scrambling code generation unit 203, and the scrambling.
  • the unit 205 is replaced with a cyclic shift amount conversion unit 801 and a reverse cyclic shift unit 901.
  • the decoding unit 301, the cyclic shift amount conversion unit 801, the reverse cyclic shift unit 901, the serving cell information control unit 305, and the CRC confirmation unit 307 constitute a restoration unit.
  • the CQI / PMI generating unit 800 and the CQI / PMI decoding unit 900 of the present embodiment convert serving cell information as compared with the CQI / PMI generating unit 200 and the CQI / PMI decoding unit 300 of the first embodiment.
  • the difference is that the value is the cyclic shift amount from the scrambling code identifier and the scrambling process is replaced with the cyclic shift process.
  • the scrambling code identifier c scr in the first embodiment is replaced with the cyclic shift amount c cs .
  • the configurations of the base station 500 and the mobile station 400 are the same as those in the first embodiment (see FIGS. 4 and 5).
  • FIG. 10 is a flowchart illustrating a CQI / PMI generation procedure in the mobile station 400 of the present embodiment. In FIG. 10, the same steps as those in FIG.
  • step S1001 the cyclic shift amount conversion unit 801, a c cs was determined by converting the serving cell information to cyclic shift amount c cs, in step S1003, the cyclic shift unit 803, the cyclic shift amount c Concatenated CQI / PMI sequence according to cs
  • FIG. 11 is a flowchart illustrating a CQI / PMI decoding procedure in base station 500 of the present embodiment. In FIG. 11, the same steps as those in FIG.
  • step S1101 the reverse cyclic shift unit 901 determines the cyclic shift amount.
  • the CQI / PMI sequence candidates are concatenated by performing a reverse cyclic shift as follows.
  • the serving cell information a (n) of the mobile station 400 is
  • FIG. 12 is a block diagram showing a configuration of a base station 1200 according to the third embodiment of the present invention.
  • This embodiment embodies a configuration in which the base station 1200 performs active state control of the mobile station 400 based on serving cell information.
  • a base station 1200 shown in FIG. 12 has a configuration in which a control unit 1201, a transmission unit 1203, a radio control unit 1205, and an antenna 1207 are added to the base station 500 of the first and second embodiments shown in FIG. is there.
  • the control unit 1201 determines whether to activate or deactivate the mobile station 400 based on the serving cell information input from the CQI / PMI decoding unit 300, and outputs the determination result to the transmission unit 1203.
  • the transmission unit 1203 transmits active state control information that instructs activation or deactivation to the mobile station 400 based on the determination result input from the control unit 1201.
  • the active state control information may be transmitted using a MAC Control Element or may be transmitted using a Layer 3 message.
  • the base station 1200 can effectively perform the active state control of the mobile station 400 based on the correct serving cell state.
  • serving cell information is added to the concatenated CQI / PMI sequence by performing scrambling or cyclic shift, but the present invention is not limited to this, and serving cell information is independent information. Bits may be concatenated before or after the CQI / PMI sequence.
  • scrambling or cyclic shifting is performed on the concatenated CQI / PMI sequence, but the present invention is not limited to this, and these processes are performed on the concatenated CQI / PMI sequence. Instead of doing this, you may do it for CRC.
  • serving cell information is added to CQI / PMI.
  • the present invention is not limited to this, and other transmission data to which a CRC code is added, for example, PUSCH (Physical Uplink Shared Channel, physical uplink).
  • Serving cell information may be added to transmission data of a link shared channel) transport block, PDSCH (Physical Downlink Shared Channel, physical downlink shared channel), and PDCCH.
  • the base station or the mobile station may be a transmission device or a reception device. Also in this case, it is clear that the uncertainty of all transmission data for a plurality of serving cells connected can be eliminated.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Communication Control (AREA)
PCT/JP2013/057809 2012-07-02 2013-03-19 送信装置、受信装置、送信方法、受信方法 Ceased WO2014006936A1 (ja)

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JP2014523619A JP5871066B2 (ja) 2012-07-02 2013-03-19 送信装置、受信装置、送信方法、受信方法
US14/407,671 US9713021B2 (en) 2012-07-02 2013-03-19 Transmission device, reception device, transmission method, and reception method
IN10347DEN2014 IN2014DN10347A (https=) 2012-07-02 2013-03-19
EP13813753.4A EP2869651A4 (en) 2012-07-02 2013-03-19 TRANSMISSION DEVICE, RECEIVING DEVICE, TRANSMISSION METHOD AND RECEIVING METHOD

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JPWO2014006936A1 (ja) 2016-06-02
IN2014DN10347A (https=) 2015-08-07
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EP2869651A1 (en) 2015-05-06
US20150172937A1 (en) 2015-06-18
US9713021B2 (en) 2017-07-18

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