WO2020059419A1 - Dispositif terminal, dispositif de station de base et procédé de communication - Google Patents

Dispositif terminal, dispositif de station de base et procédé de communication Download PDF

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Publication number
WO2020059419A1
WO2020059419A1 PCT/JP2019/032995 JP2019032995W WO2020059419A1 WO 2020059419 A1 WO2020059419 A1 WO 2020059419A1 JP 2019032995 W JP2019032995 W JP 2019032995W WO 2020059419 A1 WO2020059419 A1 WO 2020059419A1
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WO
WIPO (PCT)
Prior art keywords
slot
control resource
resource set
pdcch
terminal device
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PCT/JP2019/032995
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English (en)
Japanese (ja)
Inventor
中嶋　大一郎
智造 野上
渉 大内
翔一 鈴木
友樹 吉村
李　泰雨
会発 林
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シャープ株式会社
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Publication of WO2020059419A1 publication Critical patent/WO2020059419A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • a third aspect of the present invention is a base station apparatus for transmitting a PDCCH in a slot, and radio resource control for setting a first control resource set and a second control resource set for a terminal apparatus
  • a layer processing unit comprising a transmitting unit that transmits the PDCCH using a PDCCH candidate in the first control resource set or the second control resource set in the slot, wherein the first control resource set is The second control resource set is composed of OFDM symbols of the first half of the slot, and the second control resource set is composed of OFDM symbols of the second half of the slot.
  • Signal transmission to the terminal device starts first after Listen-Before-Talk.
  • a first number of the PDCCH candidates is configured in the second control resource set in a first slot to be performed.
  • FIG. 1 is a conceptual diagram of a wireless communication system according to one aspect of the present embodiment.
  • the wireless communication system includes terminal devices 1A to 1C and a base station device 3 (gNB).
  • the terminal devices 1A to 1C are also referred to as terminal devices 1 (UE).
  • the subcarrier interval used for the wireless communication is determined by a communication method used for the wireless communication between the terminal device 1 and the base station device 3 (for example, OFDM: Orthogonal Frequency Division Multiplex, OFDMA: Orthogonal Frequency Division, Multispectrum, SC).
  • OFDM Orthogonal Frequency Division Multiplex
  • OFDMA Orthogonal Frequency Division, Multispectrum
  • SC SC
  • FDMA Single Carrier-Frequency Division Multiple Access
  • DFT-s-OFDM One of the radio parameters for Discrete Fourier Transform-Spread-OFDM.
  • the subcarrier intervals are 15 kHz, 30 kHz, 60 kHz, and 120 kHz.
  • OFDM In the communication between the terminal device 1 and the base station device 3, when a communication method other than OFDM is used (for example, when SC-FDMA or DFT-s-OFDM is used), the generated SC is used. -FDMA symbols and / or DFT-s-OFDM symbols are also referred to as OFDM symbols. Unless otherwise specified, OFDM includes SC-FDMA or DFT-s-OFDM.
  • the length of the slot may be 0.125 ms, 0.25 ms, 0.5 ms, 1 ms.
  • the length of the slot may be 1 ms.
  • the slot length may be 0.5 ms.
  • the slot length may be 0.125 ms.
  • the length of the slot may be 1 ms.
  • one subframe may be composed of eight slots.
  • the length of the slot is 0.25 ms
  • one subframe may be composed of four slots.
  • the length of the slot is 0.5 ms
  • one subframe may be composed of two slots.
  • one subframe may be composed of one slot.
  • PRACH is used for transmitting and receiving a random access preamble (random access message 1).
  • the PRACH transmits an initial connection establishment (initial connection establishment) procedure, a handover procedure, a connection reestablishment procedure (connection @ re-establishment) procedure, synchronization (timing adjustment) for transmission of uplink data, and a request for a PUSCH (UL-SCH) resource. Used to indicate.
  • the random access preamble may be used to notify the base station device 3 of an index (random access preamble index) given from an upper layer of the terminal device 1.
  • the random access preamble may be given by cyclically shifting the Zadoff-Chu sequence corresponding to the physical root sequence index u.
  • the Zadoff-Chu sequence may be generated based on the physical root sequence index u.
  • a plurality of random access preambles may be defined in one cell.
  • the random access preamble may be specified based at least on the index of the random access preamble. Different random access preambles corresponding to different indexes of the random access preamble may correspond to different combinations of the physical root sequence index u and the cyclic shift.
  • the physical root sequence index u and the cyclic shift (a value of the cyclic shift) may be given based at least on information included in the system information.
  • the physical root sequence index u may be an index for identifying a sequence included in the random access preamble.
  • the random access preamble may be specified based at least on the physical root sequence index u.
  • the following downlink physical channel is used in downlink wireless communication from the base station device 3 to the terminal device 1.
  • the downlink physical channel is used by the physical layer to transmit and receive information output from the upper layer.
  • ⁇ PBCH Physical Broadcast Channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • the downlink control information may include Unlicensed access common information.
  • the Unlicensed @ access common information is control information on access, transmission, and the like in the unlicensed frequency band.
  • the Unlicensed access common information may be information of a downlink subframe configuration (Subframe configuration for Unlicensed Access).
  • the downlink subframe configuration may be based on the position of the OFDM symbol occupied in the subframe in which the PDCCH including the downlink subframe configuration information is allocated and / or the PDCCH including the downlink subframe configuration information. Indicates the position of the OFDM symbol that is occupied in the next subframe of the subframe to be used. In the occupied OFDM symbol, transmission and reception of a downlink physical channel and a downlink physical signal are performed.
  • PDSCH is used for transmitting and receiving downlink data (DL-SCH, PDSCH).
  • the PDSCH is used at least for transmitting and receiving a random access message 2 (random access response).
  • the PDSCH is used at least for transmitting and receiving system information including parameters used for initial access.
  • the downlink reference signal is used by the terminal device 1 to perform channel correction of the downlink physical channel.
  • the downlink reference signal is used by the terminal device 1 to calculate downlink channel state information.
  • BCH, UL-SCH and DL-SCH are transport channels.
  • a channel used in a medium access control (MAC) layer is called a transport channel.
  • the unit of the transport channel used in the MAC layer is also called a transport block or MAC @ PDU.
  • HARQ Hybrid Automatic Repeat Repeat reQuest
  • the transport block is a unit of data that the MAC layer passes (deliver) to the physical layer. In the physical layer, transport blocks are mapped to codewords, and modulation processing is performed for each codeword.
  • the base station device 3 and the terminal device 1 exchange (transmit and receive) signals in an upper layer (higher layer).
  • the base station apparatus 3 and the terminal apparatus 1 transmit and receive RRC signaling (RRC message: Radio Resource Control message, RRC information: Transmission / Reception also referred to as Radio Resource Control). May be.
  • RRC signaling and / or MAC @ CE are also referred to as higher layer signals (higher layer signaling).
  • control resource set will be described.
  • the unit of mapping of the control resource set may be a resource block.
  • the control resource set may be composed of a plurality of resource blocks.
  • the unit of mapping of the control resource set may be a plurality of resource blocks.
  • the unit of mapping of the control resource set may be an OFDM symbol.
  • the control resource set may be composed of one, two, or three OFDM symbols.
  • the control resource set may be a set of control channels (or control channel candidates) monitored by the terminal device 1.
  • the control resource set may include a set of control channels (or control channel candidates) monitored by the terminal device 1.
  • the control resource set may be configured to include one or a plurality of search areas (search space, SS: Search @ Space).
  • search space, SS: Search @ Space One or a plurality of search areas (search space, SS: Search @ Space) may be configured (set) in the control resource set.
  • the search area is configured to include one or more PDCCH candidates (PDCCH candidate).
  • the terminal device 1 receives a PDCCH candidate included in the search area and tries to receive the PDCCH (monitors the PDCCH).
  • the PDCCH candidate is also referred to as a blind detection candidate (blind @ detection @ candidate).
  • the PDCCH and / or DCI included in the CSS does not include CIF (Carrier ⁇ Indicator ⁇ Field) indicating which PDCCH / DCI schedules the PDSCH or PUSCH for which serving cell (or which component carrier). You may.
  • CIF Carrier ⁇ Indicator ⁇ Field
  • the PDCCH and / or DCI included in the USS includes any of the serving cells and / or Alternatively, the CIF indicating which component carrier PDSCH or PUSCH is scheduled may not be included.
  • the number of times of blind detection for one control resource set in one serving cell and / or one component carrier is determined based on the type of search area for PDCCH included in the control resource set, the type of aggregation level, and the number of PDCCH candidates. May be done.
  • the type of the search region may include at least one of CSS and / or USS and / or UGSS (UE @ Group @ SS) and / or GCSS (Group @ CSS).
  • the type of the aggregation level indicates the maximum aggregation level supported for the CCEs constituting the search area, and at least one of ⁇ 1, 2, 4, 8, ..., X ⁇ (X is a predetermined value) It may be defined / set from one.
  • the setting regarding the control resource set may include the REG bundle size.
  • RRC signaling may be used for transmitting and receiving a message indicating a setting related to a control resource set.
  • the SIB may be used for transmitting and receiving a message indicating a setting related to the control resource set.
  • the MIB may be used for transmitting and receiving a message indicating a setting related to the control resource set.
  • FIG. 7 is a diagram illustrating a configuration example of a CCE according to an aspect of the present embodiment.
  • the CCE may be composed of six REGs.
  • the CCE (CCE # 0) may be configured by REGs that are continuously mapped (such mapping may be referred to as Localized @ mapping) (such mapping May be referred to as non-interleaved @ CCE-to-REG @ mapping) (such a mapping may be referred to as non-interleaved @ mapping). Note that not all REGs constituting the CCE need be continuous in the frequency domain.
  • the $ CCE may be configured to include one or a plurality of REG groups.
  • REG groups are also referred to as REG bundles.
  • the number of REGs that make up one REG group is called Bundle @ size.
  • the Bundle size of the REG may be any one of 1, 2, 3, and 6.
  • an interleaver may be applied for each REG bundle.
  • the terminal device 1 may assume that the same precoder is applied to the REs in the REG group.
  • the terminal device 1 can perform channel estimation on the assumption that the precoder applied to the REs in the REG group is the same.
  • the terminal device 1 may assume that the precoders applied to the REs between the REG groups are not the same.
  • the group of REGs in the frequency domain contributes to an improvement in channel estimation accuracy.
  • the number of REGs forming a group of REGs in the frequency domain may be two, three, or a multiple of at least two, or a multiple of at least three. Is also good.
  • the number of REGs forming the REG group in the frequency domain may be given based at least on the number of PRBs of the control resource set. Further, the number of REGs forming the REG group in the frequency domain may be the same as the number of PRBs included in the control resource set.
  • the method of mapping the REGs constituting the CCE may be either interleaved @ mapping or non-interleaved @ mapping.
  • the mapping method of the REGs constituting the CCE may be either a continuous mapping method (Localized @ transmission) or a discontinuous mapping method (Distributed @ transmission).
  • the number of REGs forming a group of REGs in the frequency domain may be given based at least on the number of OFDM symbols to which one CCE is mapped.
  • the number of REGs forming a group of REGs in the frequency domain may be set individually for the number of OFDM symbols to which one CCE is mapped.
  • the radio resource control layer processing unit 16 included in the upper layer processing unit 14 performs processing of the RRC layer.
  • the radio resource control layer processing unit 16 manages various setting information / parameters of the own device.
  • the radio resource control layer processing unit 16 sets various setting information / parameters based on the upper layer signal received from the base station device 3. That is, the radio resource control layer processing unit 16 sets various setting information / parameters based on information indicating various setting information / parameters received from the base station device 3.
  • the radio resource control layer processing unit 16 sets a control resource set based on the RRC signaling received from the base station device 3.
  • the radio resource control layer processing unit 16 sets a first control resource set and a second control resource set based on the RRC signaling received from the base station device 3.
  • the radio resource control layer processing unit 16 sets an OFDM symbol constituting the first control resource set based on the RRC signaling received from the base station device.
  • the radio resource control layer processing unit 16 sets an OFDM symbol constituting the first control resource set to an OFDM symbol in the first half of the slot.
  • the radio resource control layer processing unit 16 sets an OFDM symbol constituting the second control resource set based on the RRC signaling received from the base station device.
  • the radio resource control layer processing unit 16 sets the OFDM symbols constituting the second control resource set to the latter half of the slot.
  • the RF unit 12 removes an extra frequency component from the analog signal input from the baseband unit 13 using a low-pass filter, up-converts the analog signal to a carrier frequency (up convert), and transmits the analog signal via the antenna unit 11. I do. Further, the RF unit 12 amplifies the power. Further, the RF unit 12 may have a function of controlling transmission power. The RF unit 12 is also called a transmission power control unit.
  • the wireless transmission / reception unit 30 includes an SS grasping unit, and the SS grasping unit grasps the SS configured in the terminal device 1.
  • the SS grasping unit grasps one or more PDCCH candidates in the control resource set configured as Search @ space of the terminal device.
  • the SS grasping unit grasps PDCCH candidates (the number of PDCCH candidates and the number of PDCCH candidates) configured in the search area in the first control resource set and the second control resource set of the terminal device 1.
  • the base station device 3 has a communicable range (or communication area) controlled by the base station device 3.
  • the communicable range is divided into one or more cells (or serving cells, subcells, beams, and the like), and communication with the terminal device 1 can be managed for each cell.
  • the terminal device 1 selects at least one cell from a plurality of cells and attempts to establish a connection with the base station device 3.
  • the first state in which the connection between the terminal device 1 and at least one cell of the base station device 3 is established is also referred to as an RRC connection (RRC Connection).
  • RRC Connection The second state in which the terminal device 1 has not established a connection with any cell of the base station device 3 is also referred to as RRC idle.
  • Step 5101 is a step in which the terminal device 1 requests a response for initial connection to the target cell via a physical channel.
  • step 5101 is a step in which the terminal device 1 performs the first transmission to the target cell via the physical channel.
  • the physical channel may be, for example, a PRACH.
  • the physical channel may be a channel exclusively used to request a response for an initial connection.
  • the message transmitted from the terminal device 1 via the physical channel in Step 5101 is also referred to as a random access message 1.
  • the signal of the random access message 1 may be generated based on a random access preamble index u given from an upper layer of the terminal device 1.
  • the RNTI includes SI-RNTI (System Information-RNTI), P-RNTI (Paging-RNTI), C-RNTI (Common-RNTI), Temporary C-RNTI (TC-RNTI), and RA-RNTI (RANDOS-RNTA). , CC-RNTI (Common Control-RNTI) and INT-RNTI (Interruption-RNTI).
  • SI-RNTI System Information-RNTI
  • P-RNTI Paging-RNTI
  • C-RNTI Common-RNTI
  • TC-RNTI Temporary C-RNTI
  • RANDOS-RNTA RA-RNTI
  • CC-RNTI Common Control-RNTI
  • INT-RNTI Interruption-RNTI
  • the SI-RNTI is used at least for scheduling a PDSCH transmitted including system information.
  • the P-RNTI is used at least for scheduling of a PDSCH transmitted including information such as paging information and / or system information change notification.
  • the C-RNTI is used at least for scheduling user
  • FIG. 14 is a diagram illustrating an example of a first control resource set and a second control resource set set in the terminal device 1 according to an aspect of the present embodiment.
  • the symbol is an OFDM symbol in the first half of the slot.
  • a plurality of OFDM symbols in a slot are divided into halves, and OFDM symbols earlier than half in the time domain are OFDM symbols in the first half of the slot, and OFDM symbols later than half in the time domain. Is the OFDM symbol in the latter half of the slot, but the half of the slot may not be a boundary.
  • the terminal apparatus 1 searches for the second number of PDCCH candidates in the search area of the first control resource set.
  • Monitor In slot 2 the terminal device 1 does not monitor PDCCH candidates in the search area for the second control resource set.
  • the number of PDCCH candidates in the search area of the second control resource set is zero.
  • the terminal device 1 need not set the PDCCH search area in the second control resource set.
  • the terminal device 1 monitors a third number of PDCCH candidates in a search area for the first control resource set in a slot 3 (third slot) next to the slot 2, and uses a PDCCH candidate in the second control resource set.
  • terminal apparatus 1 monitors a third number of PDCCH candidates in the search area for the first control resource set, and does not monitor PDCCH candidates in the second control resource set.
  • terminal apparatus 1 monitors a third number of PDCCH candidates in the search area for the first control resource set, and does not monitor PDCCH candidates in the second control resource set.
  • the channel occupation section may have a different value.
  • the value of the channel occupied section may be determined in advance by the country, or may be determined in advance for each frequency band.
  • the base station device 3 may notify the terminal device 1 of the channel occupied section.
  • the terminal device 1 recognizes the length of the channel occupied section and can grasp the timing at which the channel occupied section ends.
  • the value obtained by subtracting the first number from the third number is the second number.
  • the PDCCH candidate is monitored in the first control resource set configured using the OFDM symbol in the first half of the slot. / PDCCH candidates are not monitored / configured in the second control resource set configured using OFDM symbols in the latter half of the slot, and are monitored in the first control resource set in the next slot / There is no need to adjust the configured PDCCH candidates, and the PDSCH can be scheduled using many OFDM symbols in the slot while securing the flexibility of PDCCH scheduling.
  • a second number of PDCCH candidates are monitored / configured in the first control resource set, PDCCH candidates are not monitored / configured in the second control resource set, and a third control resource PDCCH candidates are not monitored / configured in the set.
  • a third slot a second number of PDCCH candidates are monitored / configured in the first control resource set, PDCCH candidates are not monitored / configured in the second control resource set, and a third control resource PDCCH candidates are not monitored / configured in the set.
  • the present invention is applicable to a case where different search regions in the same control resource set are composed of different OFDM symbols in a slot, and a case where search regions in different control resource sets are composed of different OFDM symbols in a slot. The invention can be applied.
  • the terminal device 1 receives a PDCCH in a slot from the base station device 3, sets a first search region and a second region, monitors PDCCH candidates in the first search region and the second search region, The PDCCH candidate is decoded, the first search area is configured in the first half of the slot, and the second search area is configured in the second half of the slot. Monitoring a first number of said PDCCH candidates in a second search area in a first slot determined to be present and a second number in said first search area in a second slot next to said first slot. , And monitor the third number of PDCCH candidates in the first search area in the third slot next to the second slot. The value obtained by subtracting the first number from the third number is the second number.
  • the reception processing unit of the terminal device 1 monitors a second number of PDCCH candidates in the first search area in the second slot.
  • the second number is a value obtained by subtracting the first number from the third number. Further, the second number may be a value smaller than a value obtained by subtracting the first number from the third number.
  • the second number may be a value obtained by equally dividing the third number based on the number of the plurality of search areas within a predetermined time.
  • the second number may be determined based on the third number and the first number.
  • the second number may be determined based on the third number based on the number of the plurality of search areas within a predetermined time.
  • the second number is a value obtained by subtracting the first number from the third number. Further, the second number may be a value smaller than a value obtained by subtracting the first number from the third number. The second number may be a value obtained by equally dividing the third number based on the number of the plurality of search areas within a predetermined time. The second number may be determined based on the third number and the first number. The second number may be determined based on the third number based on the number of the plurality of search areas within a predetermined time.
  • the wireless transmission / reception unit 30 grasps a first search area configured in the terminal device 1 and a second search area configured in the terminal device 1.
  • the radio transmitting / receiving unit 30 grasps a PDCCH candidate monitored by the terminal device 1 and grasps a search area.
  • the wireless transmission / reception unit 30 includes an SS grasping unit, and the SS grasping unit grasps the SS configured in the terminal device 1.
  • the SS grasping unit grasps one or more PDCCH candidates in the control resource set configured as Search @ space of the terminal device.
  • the SS grasping unit grasps PDCCH candidates (the number of PDCCH candidates and the number of PDCCH candidates) configured in the first search area and the second search area of the terminal device 1.
  • the SS grasping unit configures a third number of PDCCH candidates in the first search region. You may understand that.
  • the SS grasping unit determines whether the PDCCH candidate in the second search region is in the first slot for the terminal device 1. You may know that a PDCCH candidate is not configured.
  • the PDCCH candidate is monitored in the first search area configured using the OFDM symbol in the first half of the slot.
  • the PDCCH candidate is not monitored / configured in the second search region configured using the OFDM symbol in the latter half of the slot, so that it is monitored / configured in the first search region of the next slot.
  • the first aspect of the present invention is further characterized in that a value obtained by subtracting the first number from the third number is the second number.
  • the eighth aspect of the present invention is further characterized in that a value obtained by subtracting the first number from the third number is the second number.
  • the base station device 3 in the above-described embodiment may be an EUTRAN (Evolved Universal Terrestrial Radio Access Network). Further, the base station device 3 in the above-described embodiment may have some or all of the functions of the upper node for the eNodeB.
  • EUTRAN Evolved Universal Terrestrial Radio Access Network

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

Abstract

La présente invention réalise une communication de manière efficace sans provoquer une augmentation de la charge de traitement d'un dispositif terminal. L'invention concerne un dispositif terminal pourvu d'une unité de traitement de couche de commande de ressources sans fil pour régler un premier ensemble de ressources de commande et un second ensemble de ressources de commande, et une unité de réception pour surveiller un candidat PDCCH dans chacun des ensembles de ressources de commande. Le premier ensemble de ressources de commande est configuré à partir d'un symbole OFDM dans la première demi-partie d'un intervalle, et le second ensemble de ressources de commande est configuré à partir d'un symbole OFDM dans la seconde demi-partie d'un intervalle. Un premier nombre de candidats PDCCH dans le second ensemble de ressources de commande est surveillé dans un premier intervalle dans lequel il est déterminé qu'un dispositif de station de base transmet un signal, un deuxième nombre de candidats PDCCH dans le premier ensemble de ressources de commande sont surveillés dans un deuxième intervalle à côté du premier intervalle, et un troisième nombre de candidats PDCCH dans le premier ensemble de ressources de commande sont surveillés dans un troisième intervalle à côté du deuxième intervalle.
PCT/JP2019/032995 2018-09-20 2019-08-23 Dispositif terminal, dispositif de station de base et procédé de communication WO2020059419A1 (fr)

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Publication number Priority date Publication date Assignee Title
US20220407649A1 (en) * 2019-11-05 2022-12-22 Telefonaktiebolaget Lm Ericsson (Publ) Coreset search area optimization
US11695527B2 (en) * 2019-11-05 2023-07-04 Telefonaktiebolaget Lm Ericsson (Publ) Coreset search area optimization
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CN113543218B (zh) * 2021-07-20 2023-06-16 四川安迪科技实业有限公司 一种tdma信令报文超长的拆分方法及装置

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