WO2016182052A1 - Terminal utilisateur, station de base sans fil et procédé de communication sans fil - Google Patents

Terminal utilisateur, station de base sans fil et procédé de communication sans fil Download PDF

Info

Publication number
WO2016182052A1
WO2016182052A1 PCT/JP2016/064246 JP2016064246W WO2016182052A1 WO 2016182052 A1 WO2016182052 A1 WO 2016182052A1 JP 2016064246 W JP2016064246 W JP 2016064246W WO 2016182052 A1 WO2016182052 A1 WO 2016182052A1
Authority
WO
WIPO (PCT)
Prior art keywords
dci
signal
user terminal
epdcch
transmission
Prior art date
Application number
PCT/JP2016/064246
Other languages
English (en)
Japanese (ja)
Inventor
和晃 武田
チン ムー
リュー リュー
ホイリン ジャン
Original Assignee
株式会社Ｎｔｔドコモ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Publication of WO2016182052A1 publication Critical patent/WO2016182052A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a user terminal, a radio base station, and a radio communication method in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • Non-Patent Document 1 a successor system of LTE (for example, called LTE-A (LTE-Advanced), FRA (Future Radio Access), etc.) is also being studied.
  • LTE-A LTE-Advanced
  • FRA Full Radio Access
  • inter-device communication M2M: Machine-to-Machine
  • MTC Machine Type Communication
  • 3GPP Third Generation Partnership Project
  • MTC terminals MTC UE (User Equipment)
  • MTC UE User Equipment
  • 3GPP TS 36.300 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2”
  • 3GPP TR 36.888 “Study on provision of low-cost Machine-Type Communications (MTC) User Equipments (UEs) based on LTE (Release 12)”
  • MTC Machine-Type Communications
  • UEs User Equipments
  • the low-cost MTC terminal is realized by limiting the use band of the uplink (UL) and the downlink (DL) to a narrow band that is a part of the system band.
  • the system band corresponds to, for example, an existing LTE band (20 MHz or the like), a component carrier (CC), or the like.
  • the same signal is repeatedly transmitted over a plurality of subframes in the downlink (DL) and / or uplink (UL), so that the received signal-to-interference noise ratio (SINR: Signal) -to-Interference plus Noise Ratio) is considered to apply repetition.
  • SINR Signal-to-interference noise ratio
  • the present invention has been made in view of such a point, and in the communication of a user terminal in which the use band is limited to a narrow band that is a part of the system band, when repeated transmission using a plurality of different repetition numbers is applied. Even so, it is an object to provide a user terminal, a radio base station, and a radio communication method that can suppress a decrease in throughput.
  • a user terminal is a user terminal in which a use band is limited to a narrow part of a system band, and downlink control information (DCI: Downlink Control Information) transmitted repeatedly on a downlink control channel And a receiving unit that receives the downlink shared channel corresponding to the DCI, and a control unit that determines reception timing of the downlink shared channel based on the content of the DCI.
  • DCI Downlink Control Information
  • the present invention it is possible to suppress a decrease in throughput even in the case where repeated transmission is applied in communication of a user terminal in which a use band is limited to a narrow part of the system band.
  • a low-cost MTC terminal it is considered to allow a reduction in processing capability and simplify the hardware configuration.
  • the peak rate is reduced, the transport block size is limited, and resource blocks (RB (Resource Block), PRB (Physical Resource Block)) are compared to existing user terminals (LTE terminals). It is considered to apply the restriction on the reception and the restriction on the reception RF.
  • RB Resource Block
  • PRB Physical Resource Block
  • the low cost MTC terminal may be simply referred to as an MTC terminal.
  • An existing user terminal may be referred to as a normal UE or a non-MTC UE.
  • the upper limit of the use band of the MTC terminal is set to the system band (for example, 20 MHz (100 RB), one component carrier).
  • the upper limit of the use band of the MTC terminal is a predetermined narrow band (for example, 1.4 MHz) (6RB)).
  • the MTC terminal whose bandwidth is limited is considered to operate within the LTE / LTE-A system band.
  • the MTC terminal may be represented as a terminal whose maximum band to be supported is a narrow band that is a part of the system band, or a terminal that has a transmission / reception performance in a narrower band than the LTE / LTE-A system band May be represented.
  • FIG. 1 is a diagram showing an example of arrangement of narrow bands in the system band.
  • a predetermined narrow band for example, 1.4 MHz
  • the LTE system band for example, 20 MHz
  • the narrow band corresponds to a frequency band that can be detected by the MTC terminal.
  • the narrow band frequency position which is the use band of the MTC terminal
  • the MTC terminal preferably performs communication using different frequency resources for each predetermined period (for example, subframe).
  • the MTC terminal preferably has an RF retuning function in consideration of application of frequency hopping and frequency scheduling.
  • the channel used by the MTC terminal may be represented by adding “M” indicating MTC to a conventional channel used for the same application.
  • MTC terminal receives downlink control information (DCI: Downlink Control Information) using a downlink control channel arranged in a narrow band, and the downlink control channel is called EPDCCH (Enhanced Physical Downlink Control Channel). It may be called MPDCCH (MTC PDCCH).
  • DCI Downlink Control Information
  • EPDCCH Enhanced Physical Downlink Control Channel
  • MPDCCH MTC PDCCH
  • the MTC terminal receives downlink data using a downlink shared channel (downlink data channel) arranged in a narrow band, but the downlink shared channel may be called PDSCH (Physical Downlink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • MPDSCH MTC PDSCH
  • EPDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • the present invention is not limited to this.
  • CE coverage enhancement
  • FIG. 2 is a schematic diagram of coverage extension using repetitive transmission.
  • UE # 1 and # 2 are located in the range of eNB's normal coverage (Normal coverage), and UE # 3 and # 4 are located in the range of eNB's extended coverage (Enhanced coverage).
  • a UE under normal coverage receives an EPDCCH adjusted (link adaptation) according to a channel state or the like.
  • a low AL Aggregation Level
  • ECCE Enhanced Control Channel Element
  • the UE channel state is bad, the UE is high.
  • the ECC of AL is set.
  • repeated transmission using a high AL ECCE is set for a UE under extended coverage.
  • the UE preferably supports monitoring of a plurality of different repetition numbers (also referred to as repetition transmission times).
  • information on the correspondence between the AL related to a predetermined signal and the repetition level is sent to the user terminal in higher layer signaling (for example, RRC signaling, MAC signaling, Notification information (MIB (Master Information Block)), system information (SIB (System Information Block))), downlink control information (DCI), or the like may be used.
  • higher layer signaling for example, RRC signaling, MAC signaling, Notification information (MIB (Master Information Block)), system information (SIB (System Information Block))), downlink control information (DCI), or the like may be used.
  • MIB Master Information Block
  • SIB System Information Block
  • DCI downlink control information
  • a table indicating the correspondence between AL and repetition level and a predetermined index may be notified.
  • the information may include information related to a plurality of signals, or information related to a certain signal may be used as information related to another signal.
  • the repetition level is information regarding the number of repetitions, and may be, for example, the number of repetitions itself or predetermined information (for example, an index) associated with the number of repetitions.
  • the radio base station notifies the MTC terminal of information related to the correspondence between the repetition level and the repetition number using higher layer signaling (for example, RRC signaling, broadcast information), downlink control information (DCI), or a combination thereof. can do.
  • higher layer signaling for example, RRC signaling, broadcast information
  • DCI downlink control information
  • correspondences may be common to all cells or may be specified for each cell. Moreover, the information regarding these correspondences is good also as a structure preset to a wireless base station and a user terminal.
  • Repeated transmission includes data signals (eg, PDSCH, PUSCH (Physical Uplink Shared Channel)), control signals (eg, EPDCCH), synchronization signals (eg, PSS (Primary Synchronization Signal), SSS (Secondary Synchronization Signal)), reference signals (For example, CRS (Cell-specific Reference Signal), CSI-RS (Channel State Information Reference Signal), DMRS (Demodulation Reference Signal), SRS (Sounding Reference Signal)), etc. Good.
  • data signals eg, PDSCH, PUSCH (Physical Uplink Shared Channel)
  • control signals eg, EPDCCH
  • synchronization signals eg, PSS (Primary Synchronization Signal), SSS (Secondary Synchronization Signal)
  • reference signals For example, CRS (Cell-specific Reference Signal), CSI-RS (Channel State Information Reference Signal), DMRS (Demodulation Reference Signal), SRS (Sounding Reference Signal)
  • the MTC terminal can perform blind decoding (BD: Blind Decoding) of EPDCCH corresponding to each repetition number when a plurality of different repetition numbers are set in the EPDCCH.
  • FIG. 3 is a diagram illustrating an example of EPDCCH decoding and a corresponding PDSCH reception scenario when the number of repetitions is different.
  • 3A and 3B show blind decoding candidates # 1 and # 2, respectively.
  • level 1 for example, 4 repetitions
  • PDSCH repetitions 6 are assumed as EPDCCH repetition levels.
  • level 2 for example, 8 repetitions
  • PDSCH repetitions 6 are assumed as EPDCCH repetition levels.
  • PDSCH repetitive transmission is started after k subframes (for example, one subframe) from the last subframe of EPDCCH repetitive transmission. If the MTC terminal succeeds in detecting (decoding) the EPDCCH, the MTC terminal may start receiving the PDSCH after k subframes.
  • the value of k is not limited to this, and may be 0 or a number larger than 1, for example. In addition, the value of k may be different for each candidate. Further, information regarding the value of k may be notified to the MTC terminal or may be defined in advance.
  • EPDCCH blind decoding candidates is not limited to the example in FIG. 3, and candidates corresponding to different repetition levels may be set.
  • the radio base station may repeatedly perform transmission based on a subframe configuration (timing etc.) defined by blind decoding candidates.
  • the radio resource for blind decoding of the EPDCCH may be referred to as an EPDCCH search space.
  • FIG. 4 is a diagram illustrating a problem when the UE has successfully detected the EPDCCH before the repeated transmission of the EPDCCH is completed.
  • the eNB repeatedly transmits the EPDCCH eight times so that the subframe configuration of the candidate # 2 in FIG. 3 is obtained, and repeatedly transmits the PDSCH six times after one subframe in which the EPDCCH transmission is completed. Further, the UE assumes blind decoding candidates # 1 and # 2 shown in FIG. 3 and tries blind decoding. The UE has succeeded in decoding the EPDCCH as a result of blind decoding assuming candidate # 1 at the time of receiving 4 sub-frames of EPDCCH.
  • the UE since the eNB is transmitting with the candidate # 2, the UE tries the PDSCH reception process based on the candidate # 1. Therefore, the UE starts PDSCH reception processing (decoding) on the assumption that PDSCH starts in the sixth subframe from the left in FIG. 4, but uses EPDCCH and a subframe in which nothing is transmitted for reception processing. A correct decoding result cannot be obtained. It is obvious that the same problem can occur even when repetitive transmission is not applied to the PDSCH.
  • the UE determines the PDSCH reception timing based on the timing at which the EPDCCH is successfully detected, there is a possibility that the reception process cannot be performed appropriately. As a result, problems such as a decrease in throughput and an increase in power consumption of the UE occur.
  • the present inventors have conceived that when the UE has successfully detected the EPDCCH, the reception timing of the corresponding PDSCH can be appropriately recognized (determined). According to an embodiment of the present invention, since the DCI included in the EPDCCH detected by the UE is associated with the reception timing of the corresponding PDSCH, even when a plurality of repetitions can be set for EPDCCH transmission. Thus, the corresponding PDSCH can be appropriately decoded.
  • an MTC terminal is illustrated as a user terminal whose use band is limited to a narrow band
  • application of the present invention is not limited to an MTC terminal.
  • the narrow band is described as 6PRB (1.4 MHz)
  • the present invention can be applied based on the present specification even in other narrow bands.
  • the EPDCCH blind decoding candidates are described as being two as illustrated in FIG. 3, the present invention is not limited to this.
  • it demonstrates as what applies repetition transmission also to PDSCH, it is not restricted to this.
  • the UE determines the PDSCH reception start timing according to the maximum number of repetitions of the EPDCCH. Specifically, the UE can determine the subframe corresponding to the maximum number of repetitions among the set number of repetitions regardless of the number of repetitions of EPDCCH actually detected (regardless of the timing at which EPDCCH is successfully detected). Assume that transmission of PDSCH starts after elapse of.
  • FIG. 5 is a diagram illustrating an example of PDSCH reception start timing in the first embodiment.
  • FIG. 5 shows EPDCCH blind decoding candidates # 1 and # 2.
  • the subframe until the PDSCH is transmitted is not after k subframes from the last subframe of the actual repeated transmission of the EPDCCH, but the maximum number of repetitions (in FIG. 5). 8 times) after the last subframe of the EPDCCH.
  • PDSCH corresponding to each number of repetitions of EPDCCH is appropriately decoded without requiring additional additional signaling. be able to.
  • information (specific information) for specifying (determining) reception timing of a downlink data channel (PDSCH) corresponding to a downlink control channel is explicitly set (notified) in the UE.
  • the DCI notified by the EPDCCH is notified including information on the repetition level of the EPDCCH and / or information on the corresponding start subframe of the PDSCH.
  • the UE can determine the PDSCH reception timing based on these pieces of information.
  • the information regarding the repetition level may be an index indicating the repetition level, for example.
  • the information on the PDSCH start subframe may be, for example, the number of subframes (k described above) from the last subframe of the repeated transmission of the EPDCCH to the start subframe of the PDSCH repeated transmission. It may be an index, information on a subframe offset, or the like. Further, the information related to the PDSCH start subframe may be predetermined information (for example, an index) associated with the PDSCH start subframe.
  • the UE may determine the specific information using a predetermined table (for example, a table indicating a correspondence relationship between information on the repetition level and / or information on the start subframe and an index included in the DCI).
  • Information on the table may be notified to the UE using higher layer signaling (for example, RRC signaling, broadcast information), downlink control information (DCI), or a combination thereof, or may be set in advance.
  • FIG. 6 is a diagram illustrating an example of PDSCH reception start timing in the second embodiment.
  • FIG. 6 illustrates an example in which the eNB repeatedly performs transmission with the subframe configuration of candidate # 2 in FIG. Further, the UE assumes blind decoding candidates # 1 and # 2 shown in FIG. 3 and tries blind decoding. The UE has succeeded in decoding the EPDCCH as a result of blind decoding assuming candidate # 1 at the time of receiving 4 sub-frames of EPDCCH.
  • the UE acquires information for specifying the PDSCH start subframe from the DCI obtained by decoding.
  • “RL 2” repetition level 2
  • starting subframe 2 start subframe 2
  • the UE is notified or knows in advance that the start subframe 2 is 9 subframes after the start of transmission of the EPDCCH. For this reason, when the UE recognizes that the PDSCH starts in the start subframe 2 by DCI, the UE determines to start receiving the PDSCH corresponding to the EPDCCH 9 subframes after the transmission start of the EPDCCH.
  • the UE can appropriately perform PDSCH reception processing at the timing of candidate # 2 even though the UE detects EPDCCH at the timing of candidate # 1.
  • the specific information can be notified to the user terminal through a part or all of a predetermined field of DCI.
  • the information may be notified using a new bit field that is not defined in the conventional LTE / LTE-A system, or may be notified by replacing an existing DCI bit field.
  • an existing bit field any one of resource allocation (RA) field, MCS (Modulation and Coding Scheme) field, HPN (HARQ Process Number) field, or a combination thereof can be used. Note that other fields may be read and used.
  • the RA field only needs to be able to specify a predetermined narrow band (for example, 6 RB) resource, and the bit amount can be reduced compared to the RA field in the existing system. For this reason, a part or all of the RA field of the existing system can be used as the specific information.
  • a predetermined narrow band for example, 6 RB
  • the coverage extension mode when used in the MTC terminal (repetitive signal transmission is performed), it is considered that a part of the MCS (for example, a relatively high MCS) in the existing system is not selected. For this reason, a part or all of the MCS field of the existing system can be used as the specific information.
  • the normal terminal using FDD Frequency Division Duplex
  • the normal terminal using TDD Time Division Duplex
  • TDD Time Division Duplex
  • information regarding which field of DCI indicates information for specifying the PDSCH start subframe may be notified to the user terminal by higher layer signaling (for example, RRC signaling, broadcast information) or the like.
  • the second embodiment uses the repetition level not defined by the correspondence in the EPDCCH. Transmission may be performed.
  • the UE can determine the repetition level of the EPDCCH based on the information regarding the repetition level of the EPDCCH included in the DCI.
  • the AL of EPDCCH may be determined based on the correspondence relationship.
  • information (specific information) for specifying the start subframe of the PDSCH can be explicitly notified to the UE, so that the UE process is prevented from becoming complicated. be able to. Further, by notifying the information using a part or all of the existing DCI field, an increase in communication overhead can be suppressed.
  • a different identifier (RNTI: Radio Network Temporary Identifier) is applied to the EPDCCH according to the repetition level.
  • RNTI Radio Network Temporary Identifier
  • a CRC Cyclic Redundancy Check
  • the RNTI is, for example, C-RNTI (Cell-RNTI), but is not limited thereto.
  • the RNTI used for scrambling may be called M-RNTI (MTC-RNTI) or the like.
  • FIG. 7 is a diagram illustrating an example of a correspondence relationship between the repetition level and the RNTI in the third embodiment.
  • RNTI-1 is associated with repetition level 1
  • RNTI-2 is associated with repetition level 2.
  • the radio base station notifies the user terminal of information regarding the correspondence relationship between the repetition level and the RNTI, using either upper layer signaling (for example, RRC signaling, broadcast information), downlink control information, or a combination thereof. be able to.
  • the information on the correspondence relationship may be notified by being included in an RAR (Random Access Response) in the random access procedure, or may be notified along with the setting of the EPDCCH.
  • the information on the correspondence relationship may be configured in advance in the radio base station and the user terminal.
  • the RNTI itself associated with the repetition level may be notified by various methods in the same manner as the information on the correspondence relationship, or may be set in advance.
  • FIG. 8 is a diagram illustrating an example of eNB transmission processing according to the third embodiment.
  • FIG. 8 shows an example in which the eNB repeatedly performs transmission with the subframe configuration of candidate # 2 in FIG. It is assumed that the EPDCCH repetition level is determined in advance.
  • the eNB selects an RNTI to be used for DCI masking based on the EPDCCH repetition level. In the case of FIG. 8, since the repetition level is 2, RNTI-2 is selected.
  • the eNB transmits the EPDCCH with a predetermined number of repetitions based on the repetition level. Thereafter, PDSCH transmission is started after k subframes from the last subframe of EPDCCH repeated transmission.
  • the UE reception process in the third embodiment will be described with reference to FIGS. 9 and 10 as an example. In either figure, processing corresponding to the transmission in FIG. 8 is shown.
  • the following processing is performed.
  • the UE blindly decodes the EPDCCH assuming a certain repetition level for each subframe. That is, the CRC is descrambled (demasked) using only the RNTI corresponding to the currently assumed repetition level.
  • the repetition level corresponding to the RNTI used for the decoding can be specified, and the PDSCH reception process is started k subframes after the last subframe of the EPDCCH repeated transmission.
  • the EPDCCH decoding is not successful at the current repetition level, if there is a next repetition level, the blind decoding of the EPDCCH is attempted on the assumption.
  • FIG. 9 is a diagram illustrating an example of UE reception processing in the third embodiment.
  • the UE for the EPDCCH received in each subframe, the UE first attempts to descramble CRC using only RNTI-1 assuming a repetition level 1 (1 to 4 subframes). When 4 subframes have elapsed, decoding using RNTI-1 has not been successful.
  • the following processing is performed.
  • the UE blindly decodes the EPDCCH assuming a certain repetition level for each subframe.
  • the RNTI corresponding to the currently assumed repetition level and the RNTI corresponding to the repetition level larger than the current level are set. Used to descramble (demask) the CRC.
  • PDSCH reception processing is started k subframes after the last subframe of the EPDCCH repetitive transmission corresponding to the RNTI used for decoding. If EPDCCH can be detected by RNTI corresponding to a larger repetition level among a plurality of repetition levels, blind decoding of EPDCCH is stopped for a predetermined period (for example, period until PDSCH reception processing is started). Also good.
  • EPDCCH can be detected in a short time, and the amount of processing is increased by not performing blind decoding after detecting EPDCCH. Can be suitably suppressed.
  • FIG. 10 is a diagram illustrating another example of UE reception processing in the third embodiment.
  • the UE for example, for the EPDCCH received in each subframe, the UE first assumes repetition levels 1 and 2, and attempts to descramble CRC in each of RNTI-1 and RNTI-2 (subframes 1 to 4). ). When 4 subframes passed, decoding using RNTI-1 was not successful, but decoding using RNTI-2 was successful.
  • the PDSCH corresponding to each number of repetitions of EPDCCH can be appropriately decoded without increasing the size of DCI. Can do.
  • the table of FIG. 7 may prescribe the correspondence between the information related to the PDSCH start subframe as shown in the second embodiment and the RNTI.
  • the blind decoding process of the EPDCCH is tried for each subframe, but the present invention is not limited to this.
  • the blind decoding process may be tried every time a plurality of subframes (2 subframes, 4 subframes, etc.) are received.
  • wireless communication system Wireless communication system
  • wireless communication method which concerns on said each embodiment may each be applied independently, and may be applied in combination.
  • an MTC terminal is illustrated as a user terminal whose use band is limited to a narrow band, but is not limited to an MTC terminal.
  • FIG. 11 is a schematic configuration diagram of a wireless communication system according to an embodiment of the present invention.
  • a wireless communication system 1 shown in FIG. 11 is an example in which an LTE system is adopted in a network domain of a machine communication system.
  • carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) having the system bandwidth of the LTE system as one unit can be applied.
  • the LTE system is assumed to be set to a maximum system bandwidth of 20 MHz for both downlink and uplink, but is not limited to this configuration.
  • the wireless communication system 1 may be referred to as SUPER 3G, LTE-A (LTE-Advanced), IMT-Advanced, 4G, 5G, FRA (Future Radio Access), or the like.
  • the wireless communication system 1 includes a wireless base station 10 and a plurality of user terminals 20A, 20B, and 20C that are wirelessly connected to the wireless base station 10.
  • the radio base station 10 is connected to the higher station apparatus 30 and is connected to the core network 40 via the higher station apparatus 30.
  • the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
  • the plurality of user terminals 20 ⁇ / b> A, 20 ⁇ / b> B, and 20 ⁇ / b> C can communicate with the radio base station 10 in the cell 50.
  • the user terminal 20A is a user terminal (hereinafter, LTE terminal) that supports LTE (up to Rel-10) or LTE-Advanced (including Rel-10 and later), and the other user terminals 20B and 20C are machine
  • the MTC terminal is a communication device in the communication system.
  • the user terminals 20 ⁇ / b> A, 20 ⁇ / b> B, and 20 ⁇ / b> C are simply referred to as the user terminal 20 unless it is necessary to distinguish between them.
  • the MTC terminals 20B and 20C are terminals compatible with various communication systems such as LTE and LTE-A, and are not limited to fixed communication terminals such as electric meters, gas meters, and vending machines, but also mobile communication terminals such as vehicles. Good. Further, the user terminal 20 may communicate directly with another user terminal 20 or may communicate via the radio base station 10.
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
  • SC-FDMA is a single-carrier transmission scheme that reduces interference between terminals by dividing the system bandwidth into bands consisting of one or continuous resource blocks for each terminal and using a plurality of terminals with mutually different bands. is there.
  • the uplink and downlink radio access methods are not limited to these combinations.
  • downlink channels include a downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like. Used. User data, higher layer control information, and predetermined SIB (System Information Block) are transmitted by PDSCH. Also, MIB (Master Information Block) is transmitted by PBCH.
  • PDSCH downlink shared channel
  • PBCH Physical Broadcast Channel
  • SIB System Information Block
  • Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like.
  • Downlink control information (DCI: Downlink Control Information) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH.
  • the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
  • the HAICH transmission confirmation signal (ACK / NACK) for PUSCH is transmitted by PHICH.
  • the EPDCCH is frequency-division multiplexed with the PDSCH, and is used for transmission of DCI and the like as with the PDCCH.
  • an uplink shared channel (PUSCH: Physical Uplink Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), and a random access channel (PRACH) shared by each user terminal 20 are used. Physical Random Access Channel) is used.
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PRACH random access channel
  • Physical Random Access Channel Physical Random Access Channel
  • User data and higher layer control information are transmitted by PUSCH.
  • downlink radio quality information (CQI: Channel Quality Indicator), a delivery confirmation signal, and the like are transmitted by PUCCH.
  • a random access preamble for establishing connection with a cell is transmitted by the PRACH.
  • the channel for the MTC terminal may be represented with “M”.
  • EPDCCH, PDSCH, PUCCH, and PUSCH for the MTC terminal are called MPDCCH, MPDSCH, MPUCCH, MPUSCH, and the like, respectively. Also good.
  • FIG. 12 is a diagram illustrating an example of the overall configuration of a radio base station according to an embodiment of the present invention.
  • the radio base station 10 includes at least a plurality of transmission / reception antennas 101, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access
  • Retransmission control for example, HARQ (Hybrid Automatic Repeat reQuest) transmission processing
  • HARQ Hybrid Automatic Repeat reQuest
  • the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and transferred to each transmitting / receiving unit 103.
  • Each transmission / reception unit 103 converts the baseband signal output by precoding from the baseband signal processing unit 104 for each antenna to a radio frequency band and transmits the converted signal.
  • the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device which is described based on common recognition in the technical field according to the present invention.
  • the transmission / reception part 103 may be comprised as an integral transmission / reception part, and may be comprised from a transmission part and a receiving part.
  • the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
  • the transmission / reception unit 103 can transmit and receive various signals with a narrow bandwidth (for example, 1.4 MHz) limited by the system bandwidth (for example, one component carrier).
  • the radio frequency signal received by each transmitting / receiving antenna 101 is amplified by the amplifier unit 102.
  • Each transmitting / receiving unit 103 receives the upstream signal amplified by the amplifier unit 102.
  • the transmission / reception unit 103 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.
  • the baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT: Inverse Discrete Fourier Transform) processing, and error correction on user data included in the input upstream signal.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • Decoding, MAC retransmission control reception processing, RLC layer, and PDCP layer reception processing are performed and transferred to the upper station apparatus 30 via the transmission path interface 106.
  • the call processing unit 105 performs call processing such as communication channel setting and release, state management of the radio base station 10, and radio resource management.
  • the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface.
  • the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from other radio base stations 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface). May be.
  • CPRI Common Public Radio Interface
  • X2 interface May be.
  • FIG. 13 is a diagram illustrating an example of a functional configuration of the radio base station according to the present embodiment. Note that FIG. 13 mainly shows functional blocks of characteristic portions in the present embodiment, and the wireless base station 10 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 104 includes a control unit (scheduler) 301, a transmission signal generation unit (generation unit) 302, a mapping unit 303, a reception signal processing unit 304, a measurement unit 305, , At least.
  • the control unit (scheduler) 301 controls the entire radio base station 10.
  • the control part 301 can be comprised from the controller, the control circuit, or control apparatus demonstrated based on the common recognition in the technical field which concerns on this invention.
  • the control unit 301 controls signal generation by the transmission signal generation unit 302 and signal allocation by the mapping unit 303, for example.
  • the control unit 301 also controls signal reception processing by the reception signal processing unit 304 and signal measurement by the measurement unit 305.
  • the control unit 301 controls scheduling (for example, resource allocation) of system information, a downlink data signal transmitted by PDSCH, and a downlink control signal transmitted by PDCCH and / or EPDCCH (MPDCCH). It also controls scheduling of synchronization signals and downlink reference signals such as CRS (Cell-specific Reference Signal), CSI-RS (Channel State Information Reference Signal), DM-RS (Demodulation Reference Signal).
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • DM-RS Demodulation Reference Signal
  • the control unit 301 also transmits an uplink data signal transmitted on the PUSCH, an uplink control signal transmitted on the PUCCH and / or PUSCH (for example, a delivery confirmation signal (HARQ-ACK)), a random access preamble transmitted on the PRACH, Controls scheduling of uplink reference signals and the like.
  • an uplink data signal transmitted on the PUSCH for example, an uplink control signal transmitted on the PUCCH and / or PUSCH (for example, a delivery confirmation signal (HARQ-ACK)), a random access preamble transmitted on the PRACH, Controls scheduling of uplink reference signals and the like.
  • HARQ-ACK delivery confirmation signal
  • the control unit 301 controls the transmission signal generation unit 302 and the mapping unit 303 so that various signals are allocated to a narrow band and transmitted to the user terminal 20.
  • the control unit 301 performs control so that downlink broadcast information (MIB, SIB), EPDCCH, PDSCH, and the like are transmitted in a narrow band.
  • MIB downlink broadcast information
  • SIB downlink broadcast information
  • control unit 301 dynamically controls (sets, etc.) the number of repetitions applied to the transmission signal and / or reception signal of a predetermined user terminal 20.
  • the control unit 301 can use a plurality of different values as the number of repetitions. Then, the control unit 301 controls transmission / reception timing for a predetermined signal in consideration of the number of repetitions.
  • control unit 301 controls the interval between the last subframe for transmitting EPDCCH and the transmission start subframe for PDSCH corresponding to the EPDCCH (first implementation). Form).
  • control unit 301 performs control so that transmission of the PDSCH corresponding to the EPDCCH is started after k subframes (for example, one subframe) from the last subframe of the repeated transmission of the EPDCCH (second and third).
  • control unit 301 includes information for specifying the reception timing of the corresponding PDSCH in the DCI transmitted using the EPDCCH (second embodiment) or is associated with the repetition level for the CRC field. Control is performed so that scrambling processing is applied with an identifier (for example, C-RNTI) (third embodiment).
  • the control unit 301 determines the correspondence between the repetition level and the number of repetitions, the correspondence between the AL related to a predetermined signal and the repetition level, information for specifying the reception timing of the downlink data channel (for example, information on the repetition level of the EPDCCH, Information on the PDSCH start subframe) and the index included in the DCI, and at least a part of the correspondence between the repetition level and the RNTI. Further, the control unit 301 can perform control so as to notify the user terminal 20 of information related to these correspondences.
  • the transmission signal generation unit (generation unit) 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from the control unit 301, and outputs it to the mapping unit 303.
  • the transmission signal generation unit 302 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
  • the transmission signal generation unit 302 generates, for example, a DL assignment that notifies downlink signal allocation information and a UL grant that notifies uplink signal allocation information based on an instruction from the control unit 301. Further, the downlink data signal is subjected to coding processing and modulation processing according to a coding rate, a modulation scheme, and the like determined based on channel state information (CSI) from each user terminal 20.
  • CSI channel state information
  • the transmission signal generation unit 302 generates the same downlink signal over a plurality of subframes and outputs it to the mapping unit 303 when downlink signal repetition transmission (for example, EPDCCH and PDSCH repetition transmission) is set. To do.
  • downlink signal repetition transmission for example, EPDCCH and PDSCH repetition transmission
  • the transmission signal generation unit 302 Based on an instruction from the control unit 301, the transmission signal generation unit 302 generates a downlink signal (EPDCCH signal, MPDCCH signal) including DCI having identification information of the corresponding PDSCH reception timing, and sends it to the mapping unit 303. Output (second embodiment). Further, based on an instruction from the control unit 301, the transmission signal generation unit 302 generates a downlink signal including DCI obtained by applying scrambling processing with an identifier associated with the repetition level for the CRC field, and sends it to the mapping unit 303. Output (third embodiment).
  • the mapping unit 303 maps the downlink signal generated by the transmission signal generation unit 302 to a predetermined narrowband radio resource (for example, a maximum of 6 resource blocks) based on an instruction from the control unit 301, and transmits and receives To 103.
  • the mapping unit 303 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 103.
  • the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
  • the reception signal processing unit 304 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 304 applies reception processing for the repetitive signal to the reception signal from the user terminal 20 that transmits the repetitive signal.
  • Reception signal processing section 304 outputs information decoded by the reception processing to control section 301.
  • the reception signal processing unit 304 outputs the reception signal and the signal after reception processing to the measurement unit 305.
  • the measurement unit 305 performs measurement on the received signal.
  • the measurement part 305 can be comprised from the measuring device, measurement circuit, or measurement apparatus demonstrated based on common recognition in the technical field which concerns on this invention.
  • the measurement unit 305 may measure signal reception power (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality)), channel state, and the like.
  • the measurement result may be output to the control unit 301.
  • FIG. 14 is a diagram illustrating an example of the overall configuration of the user terminal according to the present embodiment.
  • the user terminal 20 includes at least a transmission / reception antenna 201, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the user terminal 20 may include a plurality of transmission / reception antennas 201, an amplifier unit 202, a transmission / reception unit 203, and the like.
  • the radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202.
  • the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
  • the transmission / reception unit 203 receives DCI including information on the repetition level of EPDCCH.
  • the transmission / reception unit 203 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 204.
  • the transmission / reception unit 203 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present invention.
  • the transmission / reception unit 203 may be configured as an integral transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • the baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, and the like on the input baseband signal.
  • the downlink user data is transferred to the application unit 205.
  • the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer.
  • broadcast information in the downlink data is also transferred to the application unit 205.
  • uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs transmission / reception by performing retransmission control transmission processing (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like. Is transferred to the unit 203.
  • the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
  • the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
  • FIG. 15 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment. Note that FIG. 15 mainly shows functional blocks of characteristic portions in the present embodiment, and the user terminal 20 also has other functional blocks necessary for wireless communication. As illustrated in FIG. 15, the baseband signal processing unit 204 included in the user terminal 20 includes a control unit 401, a transmission signal generation unit (generation unit) 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit. 405.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 can be composed of a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
  • the control unit 401 controls, for example, signal generation by the transmission signal generation unit 402 and signal allocation by the mapping unit 403.
  • the control unit 401 controls signal reception processing by the reception signal processing unit 404 and signal measurement by the measurement unit 405.
  • the control unit 401 obtains, from the received signal processing unit 404, a downlink control signal (a signal transmitted by PDCCH / EPDCCH) and a downlink data signal (a signal transmitted by PDSCH) transmitted from the radio base station 10.
  • the control unit 401 generates an uplink control signal (for example, an acknowledgment signal (HARQ-ACK)) or an uplink data signal based on a downlink control signal, a result of determining whether retransmission control is necessary for the downlink data signal, or the like.
  • HARQ-ACK acknowledgment signal
  • control unit 401 when the user terminal 20 is set with the number of repetitions of the uplink signal (for example, PUCCH and / or PUSCH), the control unit 401 includes the same information based on information on the repetition level of a predetermined signal. Control can be performed so that the signal is repeatedly transmitted over a plurality of subframes.
  • the control unit 401 can determine the mode of the own terminal based on the information. Further, the control unit 401 may determine the mode based on information regarding the repetition level.
  • the control unit 401 can assume a plurality of different values as the number of repetitions.
  • the control unit 401 controls transmission / reception timing for a predetermined signal in consideration of the number of repetitions. For example, the control unit 401 determines the PDSCH reception timing in consideration of the number of EPDCCH repetitions.
  • the control unit 401 determines the PDSCH reception timing corresponding to the detected EPDCCH (DCI) based on the DCI.
  • the PDSCH reception timing corresponding to the detected EPDCCH (DCI) is determined based on the maximum number of repetitions of EPDCCH (DCI) and / or the reception timing specifying information included in the decoded DCI (first Embodiment, second embodiment).
  • the reception timing may be a reception start timing (for example, reception start subframe), a transmission start timing (for example, transmission start subframe), or the like.
  • control unit 401 determines the PDSCH reception timing corresponding to the DCI based on the identifier (C-RNTI) that has successfully decoded the DCI (third embodiment).
  • the control unit 401 may instruct the received signal processing unit 404 to perform a DCI decoding process using one identifier for each subframe, or a plurality of identifiers for each subframe. Each may be used to perform DCI decoding processing, and if decoding succeeds with an identifier corresponding to a larger repetition level, it may be instructed not to perform DCI decoding processing for a predetermined period.
  • the control unit 401 correlates the repetition level and the number of repetitions, the correspondence between the AL and the repetition level for a predetermined signal, information for specifying the reception timing of the downlink data channel (for example, information regarding the repetition level of the EPDCCH, Information on the PDSCH start subframe) and the index included in the DCI, and at least a part of the correspondence between the repetition level and the RNTI.
  • the control unit 401 can determine the PDSCH reception timing using these correspondences. Note that the control unit 401 may update the correspondence relationship when information regarding the correspondence relationship is input from the reception signal processing unit 404.
  • the transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from the control unit 401 and outputs the uplink signal to the mapping unit 403.
  • the transmission signal generation unit 402 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
  • the transmission signal generation unit 402 generates an uplink control signal related to a delivery confirmation signal (HARQ-ACK) or channel state information (CSI) based on an instruction from the control unit 401, for example.
  • the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401.
  • the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
  • the transmission signal generation unit 402 generates the same uplink signal over a plurality of subframes and outputs it to the mapping unit 403 when the user terminal 20 is configured to repeatedly transmit a predetermined uplink signal.
  • the number of repetitions may be set based on an instruction from the control unit 401.
  • the mapping unit 403 Based on an instruction from the control unit 401, the mapping unit 403 maps the uplink signal generated by the transmission signal generation unit 402 to a radio resource (for example, a maximum of 6 resource blocks) and outputs the radio signal to the transmission / reception unit 203.
  • the mapping unit 403 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 203.
  • the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10.
  • the reception signal processing unit 404 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 404 applies reception processing for the repetitive signal to the reception signal from the radio base station 10 that transmits the repetitive signal.
  • the received signal processing unit 404 may perform a DCI (EPDCCH) decoding process using a predetermined identifier based on an instruction from the control unit 401.
  • DCI EPDCCH
  • the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
  • the reception signal processing unit 404 outputs broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401, for example.
  • the reception signal processing unit 404 outputs the reception signal and the signal after reception processing to the measurement unit 405.
  • the measurement unit 405 performs measurement on the received signal.
  • the measurement part 405 can be comprised from the measuring device, measurement circuit, or measurement apparatus demonstrated based on common recognition in the technical field which concerns on this invention.
  • the measurement unit 405 may measure, for example, the received power (for example, RSRP), reception quality (for example, RSRQ), channel state, and the like of the received signal.
  • the measurement result may be output to the control unit 401.
  • each functional block is realized by one physically coupled device, or may be realized by two or more physically separated devices connected by wire or wirelessly and by a plurality of these devices. Good.
  • the radio base station 10 and the user terminal 20 are realized using hardware such as ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), and FPGA (Field Programmable Gate Array). May be.
  • the radio base station 10 and the user terminal 20 are each a computer device including a processor (CPU: Central Processing Unit), a communication interface for network connection, a memory, and a computer-readable storage medium holding a program. It may be realized. That is, the radio base station, user terminal, and the like according to an embodiment of the present invention may function as a computer that performs processing of the radio communication method according to the present invention.
  • Computer-readable recording media include, for example, flexible disks, magneto-optical disks, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), CD-ROM (Compact Disc-ROM), RAM (Random Access Memory), A storage medium such as a hard disk.
  • the program may be transmitted from a network via a telecommunication line.
  • the radio base station 10 and the user terminal 20 may include an input device such as an input key and an output device such as a display.
  • the functional configurations of the radio base station 10 and the user terminal 20 may be realized by the hardware described above, may be realized by a software module executed by a processor, or may be realized by a combination of both.
  • the processor controls the entire user terminal by operating an operating system. Further, the processor reads programs, software modules and data from the storage medium into the memory, and executes various processes according to these.
  • the program may be a program that causes a computer to execute the operations described in the above embodiments.
  • the control unit 401 of the user terminal 20 may be realized by a control program stored in a memory and operated by a processor, and may be realized similarly for other functional blocks.
  • software, instructions, etc. may be transmitted / received via a transmission medium.
  • software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • DSL digital subscriber line
  • wireless technology such as infrared, wireless and microwave.
  • the radio resource may be indicated by an index.
  • the channel and / or symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell, or the like.
  • notification of predetermined information is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.
  • notification of information is not limited to the aspect / embodiment shown in this specification, and may be performed by other methods.
  • notification of information includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
  • the RRC signaling may be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • the information, signals, etc. shown in this specification may be represented using any of a variety of different technologies.
  • data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of
  • Each aspect / embodiment shown in this specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 5G
  • FRA Full Radio Access
  • CDMA2000 Code Division Multiple Access 2000
  • UMB User Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 UWB (Ultra-WideBand)
  • Bluetooth registered trademark

Landscapes

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

Abstract

La présente invention concerne la suppression des réductions de débit dans une communication par un terminal utilisateur pour lequel la bande d'utilisation est limitée à une bande étroite qui fait partie d'une bande de système, même dans les cas dans lesquels la répétition qui utilise une pluralité de différents nombres de répétition est appliquée. Un terminal d'utilisateur, selon un aspect de la présente invention, présente une bande d'utilisation de ce dernier limitée à une bande étroite qui fait partie d'une bande de système et est pourvue d'une unité de réception destinée à recevoir des informations de commande de liaison descendante (DCI) transmises de manière répétée sur un canal de commande de liaison descendante et un canal partagé de liaison descendante correspondant à la DCI mentionnée ci-dessus et une unité de commande destinée à déterminer la temporisation de réception du canal partagé de liaison descendante mentionné ci-dessus sur la base des détails dans la DCI mentionnée ci-dessus.
PCT/JP2016/064246 2015-05-14 2016-05-13 Terminal utilisateur, station de base sans fil et procédé de communication sans fil WO2016182052A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015099524A JP2016219896A (ja) 2015-05-14 2015-05-14 ユーザ端末、無線基地局及び無線通信方法
JP2015-099524 2015-05-14

Publications (1)

Publication Number Publication Date
WO2016182052A1 true WO2016182052A1 (fr) 2016-11-17

Family

ID=57249212

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/064246 WO2016182052A1 (fr) 2015-05-14 2016-05-13 Terminal utilisateur, station de base sans fil et procédé de communication sans fil

Country Status (2)

Country Link
JP (1) JP2016219896A (fr)
WO (1) WO2016182052A1 (fr)

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018173225A1 (fr) * 2017-03-23 2018-09-27 富士通株式会社 Dispositif terminal, dispositif station de base, système de communication sans fil, et procédé de communication sans fil
WO2020003523A1 (fr) * 2018-06-29 2020-01-02 株式会社Ｎｔｔドコモ Terminal utilisateur
CN110856256A (zh) * 2017-02-07 2020-02-28 上海朗帛通信技术有限公司 一种用于无线通信中的方法和装置
CN110999484A (zh) * 2017-06-08 2020-04-10 株式会社Ntt都科摩 用户终端以及无线通信方法
US10623169B2 (en) * 2018-04-27 2020-04-14 Lg Electronics Inc. Method of transmitting and receiving downlink data and apparatus therefor
CN111052694A (zh) * 2017-07-13 2020-04-21 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111164920A (zh) * 2017-08-09 2020-05-15 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111434162A (zh) * 2017-11-16 2020-07-17 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111567111A (zh) * 2017-12-27 2020-08-21 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111684847A (zh) * 2017-12-04 2020-09-18 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111742590A (zh) * 2017-12-27 2020-10-02 株式会社Ntt都科摩 基站以及无线通信方法
CN111771389A (zh) * 2017-12-27 2020-10-13 株式会社Ntt都科摩 无线基站以及无线通信方法
CN111788855A (zh) * 2018-01-05 2020-10-16 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111801972A (zh) * 2018-01-12 2020-10-20 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111869284A (zh) * 2017-12-27 2020-10-30 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111937453A (zh) * 2018-04-02 2020-11-13 株式会社Ntt都科摩 用户装置
CN112262603A (zh) * 2018-04-05 2021-01-22 株式会社Ntt都科摩 用户终端以及无线基站
CN112400351A (zh) * 2018-07-05 2021-02-23 株式会社Ntt都科摩 终端以及无线通信方法
CN112514476A (zh) * 2018-05-11 2021-03-16 株式会社Ntt都科摩 用户终端以及无线通信方法基站
CN112567792A (zh) * 2018-08-10 2021-03-26 株式会社Ntt都科摩 用户终端以及无线通信方法
CN112586051A (zh) * 2018-06-18 2021-03-30 株式会社Ntt都科摩 用户终端
CN112703794A (zh) * 2018-07-20 2021-04-23 株式会社Ntt都科摩 基站
CN112740770A (zh) * 2018-07-20 2021-04-30 株式会社Ntt都科摩 基站以及用户终端
WO2021127840A1 (fr) 2019-12-23 2021-07-01 Nec Corporation Procédé, dispositif et support de stockage informatique de communication
CN113170481A (zh) * 2018-09-28 2021-07-23 株式会社Ntt都科摩 发送装置以及接收装置
CN113170429A (zh) * 2018-09-25 2021-07-23 株式会社Ntt都科摩 用户终端
CN113170482A (zh) * 2018-09-28 2021-07-23 株式会社Ntt都科摩 用户终端
CN113169946A (zh) * 2018-09-28 2021-07-23 株式会社Ntt都科摩 用户终端以及基站
CN113785512A (zh) * 2019-02-14 2021-12-10 株式会社Ntt都科摩 用户终端以及无线通信方法
CN113906778A (zh) * 2019-04-11 2022-01-07 株式会社Ntt都科摩 用户终端以及无线通信方法
CN114041302A (zh) * 2019-04-26 2022-02-11 株式会社Ntt都科摩 用户终端以及无线通信方法
CN114041316A (zh) * 2019-05-09 2022-02-11 株式会社Ntt都科摩 用户终端以及无线通信方法
CN114208246A (zh) * 2019-08-14 2022-03-18 株式会社Ntt都科摩 用户装置、基站装置以及通信方法
US12028908B2 (en) 2018-10-15 2024-07-02 Ipcom Gmbh & Co. Kg Random access in a satellite communication system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11212813B2 (en) * 2017-01-13 2021-12-28 Qualcomm Incorporated Configuration of control resources
EP3817429B1 (fr) * 2018-06-28 2022-06-08 Ntt Docomo, Inc. Terminal d'utilisateur

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
LG ELECTRONICS: "Downlink control channel related issues for MTC", 3GPP TSG-RAN WG1#80, R1-150199, 3GPP, 13 February 2015 (2015-02-13), XP050933413 *
MEDIATEK INC.: "Discussion on potential solutions for physical channels for Rel-13 MTC UE", 3GPP TSG-RAN WG1#78BIS, R1-144122, 3GPP, XP050869770 *

Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110856256B (zh) * 2017-02-07 2022-11-25 上海朗帛通信技术有限公司 一种用于无线通信中的方法和装置
CN110856256A (zh) * 2017-02-07 2020-02-28 上海朗帛通信技术有限公司 一种用于无线通信中的方法和装置
US11877317B2 (en) 2017-02-07 2024-01-16 Honor Device Co., Ltd. Method and device used for wireless communication
WO2018173225A1 (fr) * 2017-03-23 2018-09-27 富士通株式会社 Dispositif terminal, dispositif station de base, système de communication sans fil, et procédé de communication sans fil
CN110999484A (zh) * 2017-06-08 2020-04-10 株式会社Ntt都科摩 用户终端以及无线通信方法
CN110999484B (zh) * 2017-06-08 2024-03-12 株式会社Ntt都科摩 终端、无线通信方法、基站以及系统
CN111052694A (zh) * 2017-07-13 2020-04-21 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111164920A (zh) * 2017-08-09 2020-05-15 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111434162A (zh) * 2017-11-16 2020-07-17 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111684847B (zh) * 2017-12-04 2024-04-30 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111684847A (zh) * 2017-12-04 2020-09-18 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111771389B (zh) * 2017-12-27 2024-05-14 株式会社Ntt都科摩 终端、系统以及无线通信方法
CN111742590B (zh) * 2017-12-27 2024-05-17 株式会社Ntt都科摩 基站以及无线通信方法
CN111869284A (zh) * 2017-12-27 2020-10-30 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111567111A (zh) * 2017-12-27 2020-08-21 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111742590A (zh) * 2017-12-27 2020-10-02 株式会社Ntt都科摩 基站以及无线通信方法
CN111869284B (zh) * 2017-12-27 2024-05-14 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111771389A (zh) * 2017-12-27 2020-10-13 株式会社Ntt都科摩 无线基站以及无线通信方法
CN111567111B (zh) * 2017-12-27 2024-05-14 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111788855B (zh) * 2018-01-05 2024-05-14 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111788855A (zh) * 2018-01-05 2020-10-16 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111801972A (zh) * 2018-01-12 2020-10-20 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111801972B (zh) * 2018-01-12 2024-05-17 株式会社Ntt都科摩 终端、无线通信方法、基站以及系统
CN111937453A (zh) * 2018-04-02 2020-11-13 株式会社Ntt都科摩 用户装置
CN111937453B (zh) * 2018-04-02 2024-03-15 株式会社Ntt都科摩 用户装置
CN112262603B (zh) * 2018-04-05 2024-04-02 株式会社Ntt都科摩 用户终端以及无线基站
CN112262603A (zh) * 2018-04-05 2021-01-22 株式会社Ntt都科摩 用户终端以及无线基站
US11743015B2 (en) 2018-04-27 2023-08-29 Lg Electronics Inc. Method of transmitting and receiving downlink data and apparatus therefor
US11139943B2 (en) 2018-04-27 2021-10-05 Lg Electronics Inc. Method of transmitting and receiving downlink data and apparatus therefor
US11251927B2 (en) 2018-04-27 2022-02-15 Lg Electronics Inc. Method of transmitting and receiving downlink data and apparatus therefor
US10623169B2 (en) * 2018-04-27 2020-04-14 Lg Electronics Inc. Method of transmitting and receiving downlink data and apparatus therefor
CN112514476A (zh) * 2018-05-11 2021-03-16 株式会社Ntt都科摩 用户终端以及无线通信方法基站
CN112586051A (zh) * 2018-06-18 2021-03-30 株式会社Ntt都科摩 用户终端
WO2020003523A1 (fr) * 2018-06-29 2020-01-02 株式会社Ｎｔｔドコモ Terminal utilisateur
CN112400351A (zh) * 2018-07-05 2021-02-23 株式会社Ntt都科摩 终端以及无线通信方法
CN112400351B (zh) * 2018-07-05 2023-12-19 株式会社Ntt都科摩 终端以及无线通信方法
CN112740770A (zh) * 2018-07-20 2021-04-30 株式会社Ntt都科摩 基站以及用户终端
CN112703794A (zh) * 2018-07-20 2021-04-23 株式会社Ntt都科摩 基站
CN112567792B (zh) * 2018-08-10 2024-02-23 株式会社Ntt都科摩 用户终端以及无线通信方法
CN112567792A (zh) * 2018-08-10 2021-03-26 株式会社Ntt都科摩 用户终端以及无线通信方法
CN113170429A (zh) * 2018-09-25 2021-07-23 株式会社Ntt都科摩 用户终端
CN113169946A (zh) * 2018-09-28 2021-07-23 株式会社Ntt都科摩 用户终端以及基站
CN113170482A (zh) * 2018-09-28 2021-07-23 株式会社Ntt都科摩 用户终端
CN113170482B (zh) * 2018-09-28 2024-03-01 株式会社Ntt都科摩 终端、基站、系统以及无线通信方法
CN113169946B (zh) * 2018-09-28 2024-03-12 株式会社Ntt都科摩 终端、基站、系统以及基站
CN113170481A (zh) * 2018-09-28 2021-07-23 株式会社Ntt都科摩 发送装置以及接收装置
CN113170481B (zh) * 2018-09-28 2024-03-12 株式会社Ntt都科摩 发送装置以及接收装置
US12028908B2 (en) 2018-10-15 2024-07-02 Ipcom Gmbh & Co. Kg Random access in a satellite communication system
CN113785512A (zh) * 2019-02-14 2021-12-10 株式会社Ntt都科摩 用户终端以及无线通信方法
CN113906778A (zh) * 2019-04-11 2022-01-07 株式会社Ntt都科摩 用户终端以及无线通信方法
CN113906778B (zh) * 2019-04-11 2024-01-09 株式会社Ntt都科摩 终端、系统以及无线通信方法
CN114041302A (zh) * 2019-04-26 2022-02-11 株式会社Ntt都科摩 用户终端以及无线通信方法
CN114041316B (zh) * 2019-05-09 2023-08-15 株式会社Ntt都科摩 用户终端以及无线通信方法
CN114041316A (zh) * 2019-05-09 2022-02-11 株式会社Ntt都科摩 用户终端以及无线通信方法
CN114208246B (zh) * 2019-08-14 2024-01-09 株式会社Ntt都科摩 用户装置、基站装置以及通信方法
CN114208246A (zh) * 2019-08-14 2022-03-18 株式会社Ntt都科摩 用户装置、基站装置以及通信方法
EP4082133A4 (fr) * 2019-12-23 2022-11-23 NEC Corporation Procédé, dispositif et support de stockage informatique de communication
WO2021127840A1 (fr) 2019-12-23 2021-07-01 Nec Corporation Procédé, dispositif et support de stockage informatique de communication

Also Published As

Publication number Publication date
JP2016219896A (ja) 2016-12-22

Similar Documents

Publication Publication Date Title
WO2016182052A1 (fr) Terminal utilisateur, station de base sans fil et procédé de communication sans fil
JP6093827B1 (ja) ユーザ端末、無線基地局及び無線通信方法
US10555280B2 (en) User terminal, radio base station and radio communication method
WO2017135345A1 (fr) Terminal d'utilisateur, station de base sans fil et procédé de communication sans fil
WO2017170889A1 (fr) Terminal utilisateur et procédé de communication sans fil
JP6779212B2 (ja) ユーザ端末、無線基地局及び無線通信方法
JP2021029057A (ja) 端末、基地局、無線通信方法及びシステム
JP7182876B2 (ja) 端末、無線通信方法、基地局及びシステム
JP2018133821A (ja) ユーザ端末、無線基地局及び無線通信方法
JP6325693B2 (ja) ユーザ端末、無線基地局及び無線通信方法
WO2016072257A1 (fr) Terminal utilisateur, station de base sans fil et procédé de communication sans fil
WO2017135419A1 (fr) Terminal utilisateur, station de base sans fil et procédé de communication sans fil
WO2017033841A1 (fr) Terminal utilisateur, station de base sans fil et procédé de communication sans fil
US10638502B2 (en) User terminal, radio base station and radio communication method
WO2017026513A1 (fr) Terminal utilisateur, station de base sans fil, procédé de communication sans fil et système de communication sans fil
CN108702629B (zh) 用户终端、无线基站以及无线通信方法
JPWO2017150451A1 (ja) ユーザ端末、無線基地局及び無線通信方法
JP6844854B2 (ja) 端末、基地局及び無線通信方法
WO2017051712A1 (fr) Terminal d'utilisateur, station de base radio, et procédé de radiocommunication
WO2017026514A1 (fr) Terminal d'utilisateur, station de base sans fil, procédé de communication sans fil et système de communication sans fil
WO2017135418A1 (fr) Terminal utilisateur, station de base sans fil, et procédé de communication sans fil
JP2018046589A (ja) ユーザ端末、無線基地局及び無線通信方法
JP2017038321A (ja) ユーザ端末、無線基地局及び無線通信方法
CN107211396B (zh) 用户终端及无线通信方法
JP7010696B2 (ja) 端末及び無線通信方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16792776

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16792776

Country of ref document: EP

Kind code of ref document: A1