WO2011001697A1 - Appareil d'émission radio et procédé d'émission radio - Google Patents

Appareil d'émission radio et procédé d'émission radio Download PDF

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Publication number
WO2011001697A1
WO2011001697A1 PCT/JP2010/004363 JP2010004363W WO2011001697A1 WO 2011001697 A1 WO2011001697 A1 WO 2011001697A1 JP 2010004363 W JP2010004363 W JP 2010004363W WO 2011001697 A1 WO2011001697 A1 WO 2011001697A1
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WIPO (PCT)
Prior art keywords
frame
allocated
subframe
long tti
map
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Application number
PCT/JP2010/004363
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English (en)
Japanese (ja)
Inventor
栗謙一
吉井勇
岸上高明
今村大地
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パナソニック株式会社
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Publication of WO2011001697A1 publication Critical patent/WO2011001697A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the present invention relates to a wireless transmission device and a wireless transmission method.
  • the 3rd generation mobile communication service has been started, and multimedia communication such as data communication and video communication has become very popular. Under these circumstances, it is expected that the area in which communication is possible will expand as the demand for further communication in any environment increases.
  • transmission using long TTI is performed by encoding transmission data by bundling a plurality of sub-frames and transmitting it as one HARQ (Hybrid Automatic Repeat reQuest) process. Since the rate can be set low, it is possible to improve the reception quality of a radio communication mobile station apparatus (hereinafter simply referred to as “mobile station”) located at a cell edge where reception power is not sufficiently obtained.
  • mobile station radio communication mobile station apparatus
  • long-TTI indicator Long-TTI-indicator
  • A-MAP Advanced-MAP
  • FIG. 1 shows the allocation status of long TTIs composed of 6 downlink (DL) subframes in a TDD (Time Division Duplex) frame in which one frame is composed of 8 subframes.
  • FIG. 1A shows a case where one frame is composed of six DL subframes and two uplink (UL) subframes
  • FIG. 1B shows that one frame is composed of three DL subframes. The case where it is comprised with five UL sub-frames is shown.
  • ACID HARQ Channel Identifier
  • the mobile station after receiving the data for three subframes in frame i, the mobile station performs data decoding and error detection as shown in FIG. 2, and reports the ACK / NACK signal to the base station. .
  • the required quality is satisfied in 6 subframes, and decoding and error detection are performed only by receiving 3 subframes. Therefore, the required quality cannot be satisfied, and a NACK signal is reported. That is, useless resources are consumed for reporting the NACK signal.
  • An object of the present invention is to provide a radio transmission apparatus and a radio transmission method capable of suppressing an increase in the amount of signaling even when a long TTI is allocated over a plurality of frames.
  • the radio transmission apparatus of the present invention when arranging a plurality of control channels in the same frame, a control means for arranging one control channel in the last downlink subframe among the downlink subframes constituting the first frame; And a transmission means for transmitting the plurality of control channels arranged by the control means.
  • one control channel is arranged in the last downlink subframe among the downlink subframes constituting the first frame, and the arrangement is performed. To send multiple control channels.
  • an increase in signaling amount can be suppressed even when a long TTI is allocated over a plurality of frames.
  • the figure which shows the allocation status of long TTI comprised by six downlink sub-frames in the TDD frame which one frame comprises eight sub-frames The figure which shows the allocation status of long TTI comprised by six downlink sub-frames in the TDD frame which one frame comprises eight sub-frames
  • the figure which shows a mode that the control signal which notifies that the continuous allocation remains in the following frame remains
  • region corresponding to the long TTI indicator in a TDD frame structure of 3 DL sub-frames and 5 UL sub-frames The figure which shows the allocation area
  • FIG. 4 is a block diagram showing a configuration of a radio communication base station apparatus (hereinafter simply referred to as “base station”) according to Embodiment 1 of the present invention.
  • a CRC unit 101 performs error detection coding on an information bit sequence and control information, and outputs an information bit sequence to which a CRC (Cyclic Redundancy Check) parity bit is added to an encoding unit 102.
  • CRC Cyclic Redundancy Check
  • the encoding unit 102 performs error correction encoding on the information bit sequence to which the CRC parity bits are added and the control information, and outputs a codeword matching the coding rate input from the control unit 110 to the modulation unit 103.
  • different error correction codes for information bit strings and different error correction codes for control information are applied. For example, a turbo code is applied to the information bit string, and a tail-biting convolutional code is applied to the control information.
  • Modulation section 103 modulates each codeword corresponding to the information bit string and control information output from encoding section 102 with the modulation multi-level number input from control section 110 to generate a data symbol, and To 104.
  • Multiplexing section 104 arranges the data symbols output from modulation section 103 in the allocation time and frequency resources instructed from control section 110, and multiplexes the input pilot signals into the data symbols to generate baseband signals. Form. The formed baseband signal is output to transmission RF section 105. Details of the arrangement of the multiplexing unit 104 in time and frequency resources will be described later.
  • the transmission RF unit 105 converts the frequency of the baseband signal output from the multiplexing unit 104 into an RF signal and transmits the RF signal from the antenna 106.
  • the reception RF unit 107 receives control signals (ACK / NACK signal and CQI signal) transmitted from the mobile station via the antenna 106, converts the received control signal into a baseband signal, and outputs it to the demodulation unit 108. To do.
  • control signals ACK / NACK signal and CQI signal
  • Demodulation section 108 demodulates the control signal output from reception RF section 107 and outputs it to decoding section 109, and decoding section 109 decodes the control signal output from demodulation section 108 and outputs it to control section 110. .
  • the control unit 110 identifies the ACK / NACK signal and the CQI signal included in the control information output from the decoding unit 109. Based on the identified CQI signal, the control unit 110 determines transmission parameters such as a coding rate, the number of modulation multi-values, and allocation resources, generates control information to be notified to the mobile station based on the determined transmission parameters, and generates a CRC. Output to the unit 101. In addition, control section 110 outputs the determined coding rate to coding section 102, outputs the modulation multi-level number to modulation section 103, and outputs allocation resources such as allocation time and frequency resources to multiplexing section 104.
  • transmission parameters such as a coding rate, the number of modulation multi-values, and allocation resources
  • control unit 110 determines eight control information values shown in Table 1 based on the CQI signal from the mobile station, generates control information based on the values, and outputs the control information to the CRC unit 101.
  • the long TTI indicator is represented by 1 bit. When the value is 0, it indicates the allocation of a single subframe in which A-MAP is arranged, and when the value is 1, the subframe in which A-MAP is arranged. Shows consecutive assignments to all subsequent DL subframes.
  • FIG. 5A shows a case where the value of the long TTI indicator is 0 (0b0)
  • FIG. 5B shows a case where the value of the long TTI indicator is 1 (0b1).
  • ACID is expressed by 4 bits and indicates the HARQ process number. If the value indicated by this ACID is the same, it is identified as data of the same HARQ process, and if the value is different, it is identified as data of another HARQ process.
  • the multiplexing unit 104 converts the data symbols formed of information bit strings and the data symbols formed of control information into time and frequency resources according to respective LRU (Logical Resource Unit) numbers input from the control unit 110. Deploy.
  • LRU Logical Resource Unit
  • the left side of FIG. 6 shows physical time and frequency resources
  • the right side of FIG. 6 shows logical resources obtained by replacing physical resources with LRU numbers
  • physical resources and logical resources are paired with each other according to replacement rules. 1 corresponds.
  • IEEE 802.16m it is defined that when one subframe is composed of 6 OFDM symbols and there is a 10 MHz frequency band, 48 LRUs are composed. All LRUs are a distributed LRU (Distributed LRU) area for obtaining frequency diversity gain, and a localized LRU (Localized LRU) area for continuously arranging resources with good frequency characteristics. It consists of two. The control channel arrangement area is arranged in a part of the distributed LRU area.
  • control unit 110 may arrange a data symbol configured with control information of a certain mobile station in an LRU No. X3 and arrange a data symbol configured with an information bit string in an LRU No. Y2, Y3. It shows how it is instructed. Further, the LRU numbers (Y2, Y3) in which the data symbols composed of information bit strings are arranged are notified by a parameter called resource allocation (Resource Allocation) shown in Table 1.
  • resource allocation Resource Allocation
  • the A-MAP in which the same ACID value and the same long TTI indicator as the A-MAP in the first DL subframe are set in the third DL subframe which is the last DL subframe in the frame.
  • FIG. 9 is a block diagram showing a configuration of the mobile station according to Embodiment 1 of the present invention.
  • a reception RF unit 202 receives a signal transmitted from a base station via an antenna 201, converts the frequency of the received signal into a baseband signal, and outputs the baseband signal to the separation unit 203.
  • Separating section 203 separates the received data signal into a control signal (including information such as allocation time, frequency resource, number of modulation multi-values, coding rate, information sequence length, etc.), received data symbol, and received pilot signal.
  • control information processing section 204 receives received data symbols from demodulation section 205
  • received pilot signals are output to channel quality estimation section 208.
  • the control information processing unit 204 demodulates and decodes the received control signal, specifies control information (allocation time, frequency resource, number of modulation multi-values, coding rate, information sequence length), and allocates time, frequency resource, and modulation
  • control information allocation time, frequency resource, number of modulation multi-values, coding rate, information sequence length
  • the multi-value number is output to demodulation section 205, and the coding rate and information sequence length are output to decoding section 206. Details of the control information processing in the control information processing unit 204 will be described later.
  • Demodulation section 205 demodulates the received data symbol output from demultiplexing section 203 according to the allocation time, frequency resource, and modulation multilevel number output from control information processing section 204, and decoding section 206 receives control information processing section 204 from Based on the output coding rate and information sequence length, likelihood information for each bit output from the demodulator 205 is stored in the reception buffer, error correction decoding is performed, and a decoded bit string is obtained. The decoded bit string is output to the error detection unit 207. Decoding section 206 discards the received data stored in the reception buffer in the decoder only when an ACK signal is input from error detection section 207.
  • the error detection unit 207 performs error detection (CRC-check) on the decoded bit string output from the decoding unit 206. As a result of error detection, if there is an error in the decoded bit, a NACK signal is generated as a response signal. If there is no error in the decoded bit, an ACK signal is generated as a response signal, and the decoding unit 206 and the control signal generation unit 209 Output to. Also, the error detection unit 207 outputs the decoded bit string as a received bit string when there is no error in the decoded bit string.
  • CRC-check error detection
  • Channel quality estimation section 208 estimates the channel quality (SINR) from the received pilot signal and outputs the SINR estimated value to control signal generation section 209.
  • SINR channel quality
  • Control signal generation section 209 generates feedback information by combining the ACK / NACK signal output from error detection section 207 and the SINR estimation value output from channel quality estimation section 208, and outputs the feedback information to encoding section 210. .
  • the encoding unit 210 and the modulation unit 211 encode and modulate the feedback information output from the control signal generation unit 209 and output it to the transmission RF unit 212.
  • the transmission RF unit 212 converts the feedback information output from the encoding unit 210 into an RF signal, and transmits the RF signal from the antenna 201.
  • the mobile station receives the A-MAP arranged in the first DL subframe of the frame i shown in FIG. 7, and the control information processing unit 204 is the control information addressed to itself through decoding and error detection.
  • the control information processing unit 204 is the control information addressed to itself through decoding and error detection.
  • the mobile station receives the A-MAP arranged in the third DL subframe of the frame i shown in FIG. 7 and recognizes it as control information addressed to itself through decoding and error detection, Similarly, the resource allocation, long TTI indicator, and ACID parameter values are confirmed.
  • the control information processing unit 204 determines that (1) ACID of the third A-MAP is the same as that of the first DL subframe, and (2) that the long TTI indicator is “1”. Is received, the demodulator 205 is instructed to continue the continuous long TTI reception of 3 subframes in the frame i + 1.
  • the A-MAP in which the same ACID value and the same long TTI indicator as the A-MAP in the same frame are arranged in the last DL subframe in the frame By providing a rule that continuously assigns long TTIs to other DL subframes, it is possible to assign long TTIs over a plurality of frames without adding control information.
  • control channel such as A-MAP
  • the present invention is not limited to this, and for example, FIG. As shown in FIG. 5, a control channel such as A-MAP may be arranged in the second DL subframe of the first frame, and a long TTI of 5 subframes may be allocated over 2 frames.
  • the configuration of the base station according to the second embodiment of the present invention is the same as the configuration shown in FIG. 4 of the first embodiment, and only some functions are different. To do.
  • the group assignment is a DL group configuration A-MAP (hereinafter referred to as “GC A-MAP (Group Configuration A-MAP)”) that indicates a group configuration composed of a plurality of mobile stations. ) And DL group resource allocation A-MAP (hereinafter referred to as “GRA A-MAP (DL Group Resource Allocation A-MAP)”) indicating the allocated resource. Further, the long TTI indicator and the ACID parameter are notified by GCGA-MAP and set in common to all mobile stations in the group.
  • GC A-MAP Group Configuration A-MAP
  • GRA A-MAP DL Group Resource Allocation A-MAP
  • the control unit 110 is provided with a rule that the same ACID value and the same long TTI indicator as GRAGA-MAP are interpreted, and the long TTI is continuously assigned to the DL subframe of the immediately following frame. Thereby, long TTI allocation for 6 subframes can be realized over 2 frames without adding control information.
  • the GRA A-MAP in the same frame is arranged in the last DL subframe in the frame, and the same ACID value and the same as the previous GRA A-MAP in the same frame.
  • the configuration of the base station according to Embodiment 3 of the present invention is the same as the configuration shown in FIG. 4 of Embodiment 1, and only some of the functions are different. To do.
  • a long TTI is continuously allocated for two frames (frames i and i + 1), and the last DL subframe of the rear frame (frame i + 1) is assigned to the GRA A-MAP in the immediately preceding frame (frame i).
  • the control unit 110 is provided with a rule that the arrangement of the GRAMA-MAP in which the same ACID value and the same long TTI indicator are set assigns a long TTI to the DL subframe of the immediately following frame (frame i + 2). .
  • a long TTI of 9 subframes over 3 frames can be allocated to a group of a plurality of mobile stations without adding control information.
  • the long TTI is allocated to the third frame by arranging GRA A-MAP in the last DL subframe of the second frame, but as shown in FIG.
  • GRA A-MAP is arranged, and notification that the long TTI is assigned to the second frame, and GRA A-MAP is assigned to the third DL subframe of the first frame. It may be arranged to notify that a long TTI is assigned to the third frame.
  • Embodiment 4 In Embodiments 2 and 3, a case has been described in which long TTIs having the same number of subframes are allocated to mobile stations in the same group. However, in Embodiment 4 of the present invention, each mobile station in the same group differs. A case where a long TTI having the number of subframes is allocated will be described.
  • the configuration of the base station according to the fourth embodiment of the present invention is the same as the configuration shown in FIG. 4 of the first embodiment, and only some functions are different. To do.
  • the mobile station having the assignment notification in the last DL subframe is provided with a rule that all subframes of the immediately following frame are continuously allocated.
  • the user bitmap in GRA A-MAP in the first DL subframe of frame i indicates that long TTIs are assigned to users # 1, # 4, and # 5. Is assigned a long TTI of 3 subframes in frame i. Also, the user bitmap in GRA-A-MAP in the third DL subframe of frame i indicates that long TTIs are assigned to users # 1 to # 4, and these users are assigned 3 in frame i + 1. A long TTI of the subframe is assigned.
  • users # 1 and # 4 can be assigned a long TTI of 6 subframes over 2 frames (frames i and i + 1), and users # 2 and # 3 can be assigned a rear frame (frame i + 1). Can be assigned a long TTI for three subframes, and user # 5 can be assigned a long TTI for three subframes in the preceding frame (frame i).
  • a mobile station that is notified by GRA-A-MAP and has an allocation notification in the last DL subframe in the frame by the user bitmap indicating the allocation status of each mobile station in the group
  • Embodiment 5 In Embodiment 4, a case has been described in which all subframes of the immediately following frame are continuously allocated to a mobile station that has been notified of allocation in the last DL subframe in the frame, but in Embodiment 5 of the present invention, A case will be described in which one subframe is allocated to a mobile station that has been notified of allocation in the last DL subframe in the frame.
  • the configuration of the base station according to Embodiment 5 of the present invention is the same as the configuration shown in FIG. 4 of Embodiment 1, and only some of the functions are different. To do.
  • a mobile station that has been notified of assignment only in the last DL subframe has a single sub-location in which this GRA A-MAP is arranged.
  • a rule for assigning a frame is provided in the control unit 110.
  • the user bitmap in GRA A-MAP in the first DL subframe of frame i indicates that long TTIs are assigned to users # 1, # 4, and # 5. Is assigned a long TTI of 3 subframes in frame i. Also, the user bitmap in GRA-A-MAP in the third DL subframe of frame i indicates that long TTIs are assigned to users # 1 and # 4, and these users are assigned 3 in frame i + 1. A long TTI of the subframe is assigned. Furthermore, the user bitmap in GRA A-MAP in the third DL subframe of frame i shows that only the last DL subframe is allocated to users # 2 and # 3. One subframe is allocated in frame i.
  • a long TTI of 6 subframes can be allocated to users # 1 and # 4 over 2 frames (frames i and i + 1), and a forward frame (frame i) is assigned to users # 2 and # 3.
  • 1 sub-frames can be allocated to user # 5
  • a long TTI of 3 sub-frames can be allocated to user # 5 in the front frame (frame i).
  • this GRA A-MAP is allocated to a mobile station that has been notified of allocation in the last DL subframe in the frame by the user bitmap notified by GRA A-MAP.
  • GRA A-MAP is mainly arranged in the first DL subframe and the third DL subframe of the first frame, and the long TTI of 6 subframes is divided into two frames.
  • the present invention is not limited to this.
  • GRA A-MAP is assigned to the second DL subframe and the third DL subframe of the first frame.
  • the long TTI of 4 subframes may be allocated to 2 frames every 2 subframes.
  • a frame configuration including three DL subframes and five UL subframes has been described as an example.
  • the present invention is not limited to this, and the number of DL subframes and UL subframes are not limited thereto.
  • the DL transmission has been described as an example.
  • the present invention is not limited to this, and can be applied to UL transmission as shown in FIG.
  • the TDD system has been described as an example.
  • the present invention is not limited to this, and is applicable to an FDD (Frequency Division Multiplex) system.
  • each functional block used in the description of each of the above embodiments is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them. Although referred to as LSI here, it may be referred to as IC, system LSI, super LSI, or ultra LSI depending on the degree of integration.
  • the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • An FPGA Field Programmable Gate Array
  • a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
  • this invention is applicable similarly also with an antenna port (antenna port).
  • Antenna port refers to a logical antenna composed of one or more physical antennas. That is, the antenna port does not necessarily indicate one physical antenna, but may indicate an array antenna composed of a plurality of antennas.
  • 3GPP LTE it is not specified how many physical antennas an antenna port is composed of, but it is specified as a minimum unit in which a base station can transmit different reference signals (Reference signal).
  • the antenna port may be defined as a minimum unit for multiplying the weight of a precoding vector (Precoding vector).
  • the radio transmission apparatus and radio transmission method according to the present invention can be applied to, for example, a mobile communication system.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un appareil d'émission radio et un procédé d'émission radio grâce auxquels, même si un intervalle TTI long a été alloué sur une pluralité de trames, il est possible de supprimer l'augmentation de la quantité de signalisation. Il est fourni une règle selon laquelle le fait de placer dans la dernière (troisième) sous-trame de liaison descendante une A-MAP dans laquelle se trouvent la même valeur ACID et le même indicateur de TTI long que dans une A-MAP placée dans la première sous-trame de liaison descendante d'une trame (trame i), alloue en continu également un TTI long aux sous-trames de liaison descendante de la trame immédiatement suivante (trame i + 1).
PCT/JP2010/004363 2009-07-03 2010-07-02 Appareil d'émission radio et procédé d'émission radio WO2011001697A1 (fr)

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JP2009-159211 2009-07-03

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JP2018521531A (ja) * 2015-05-01 2018-08-02 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． ミリメートル波通信における復号遅延をスケジューリングすることに基づいてデータ伝送を受信するための装置、ネットワーク、及び方法

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018521531A (ja) * 2015-05-01 2018-08-02 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． ミリメートル波通信における復号遅延をスケジューリングすることに基づいてデータ伝送を受信するための装置、ネットワーク、及び方法
JP2019216454A (ja) * 2015-05-01 2019-12-19 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． ミリメートル波通信における復号遅延をスケジューリングすることに基づいてデータ伝送を受信するための装置、ネットワーク、及び方法
US10873377B2 (en) 2015-05-01 2020-12-22 Futurewei Technologies, Inc. Device, network, and method for receiving data transmission under scheduling decoding delay in mmWave communication
US11909476B2 (en) 2015-05-01 2024-02-20 Futurewei Technologies, Inc. Device, network, and method for receiving data transmission under scheduling decoding delay in mmWave communication

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