WO2023022164A1 - 端末、無線通信方法及び基地局 - Google Patents
端末、無線通信方法及び基地局 Download PDFInfo
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- H—ELECTRICITY
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Definitions
- one of the objects of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can suitably realize repeated transmission of PUCCH using a transmission time unit shorter than a slot.
- N_PUCCH ⁇ repeat>1 the UE follows rules 1-1 to 1-3 below.
- the UE repeats PUCCH transmission with UCI for N_PUCCH ⁇ repeat slots.
- PUCCH transmissions in each of the N_PUCCH ⁇ repeat slots have the same number of consecutive symbols.
- the number of symbols is specified in the number of symbols information element nrofsymbols in the PUCCH format 1 information element PUCCH-format1 or in the number of symbols information element nrofsymbols in the PUCCH format 3 information element PUCCH-format3 or in the PUCCH format 3 information element PUCCH-format3. provided by the number of symbols information element, nrofsymbols.
- Subslot-based PUCCH repetition (Subslot-based PUCCH repetition) Rel. 17 that subslot-based PUCCH repetition is supported. For example, for subslot-based PUCCH, Rel. Subslot-based PUCCH repetition for HARQ-ACK is supported for 16 slot-based PUCCH procedures, Rel. It is being considered that dynamic repetition indication is also supported for subslot-based PUCCH in V.17, and PUCCH repetition for PUCCH formats 0 and 2 is supported for subslot-based PUCCH repetition.
- the panel identifier (ID) and the panel may be read interchangeably.
- ID and TRP may be read interchangeably.
- ID and index may be read interchangeably.
- the first embodiment describes a case where PUCCH repetition based on transmission time units shorter than a slot is supported for PUCCH resources corresponding to configuration information based on transmission time units shorter than the slot.
- a time unit shorter than a slot may be read as a subslot, a minislot, a predetermined number of symbols, or a symbol set.
- sub-slot-based PUCCH repetition will be described as an example of PUCCH repetition based on a transmission time unit shorter than a slot, but the present invention is not limited to this.
- Subslot-based PUCCH repetition may be supported only for PUCCH resources corresponding to subslot-based PUCCH configuration information.
- the PUCCH resource corresponding to the slot-based PUCCH configuration information may not be applied to the PUCCH repetition corresponding to the sub-slot base.
- PUCCH resources may be configured separately for sub-slot-based PUCCH repetition and other PUCCHs (eg, slot-based PUCCH transmission/sub-slot-based PUCCH transmission).
- Subslot-based PUCCH repetition may be transmitted in each subslot indicated by configuration information about the subslot length of PUCCH (eg, subslotLengthForPUCCH) (see FIG. 2).
- the UE controls to perform PUCCH transmission in each subslot (7 symbols).
- the second embodiment describes a case where sub-slot-based PUCCH repetition is supported for PUCCH resources corresponding to slot-based PUCCH configuration information/sub-slot-based PUCCH configuration information.
- Subslot-based PUCCH setting information For sub-slot based PUCCH configuration information (e.g. sub-slot based PUCCH-Config), PUCCH repetition is per sub-slot indicated/defined by information on sub-slot length (e.g. higher layer parameter subslotLengthForPUCCH) may be done.
- sub-slot based PUCCH configuration information e.g. sub-slot based PUCCH-Config
- PUCCH repetition is per sub-slot indicated/defined by information on sub-slot length (e.g. higher layer parameter subslotLengthForPUCCH) may be done.
- one of the information on the length of the first subslot (eg, subslotLengthForPUCCH) and the information on the length of the second subslot (eg, subslotLengthForPUCCHRepetition-r17) is set in the UE (or , are not set at the same time).
- the UE applies no repetition transmission when the information about the length of the first subslot is configured, and applies subslot-based repetition transmission when the information about the length of the second subslot is configured. may be controlled to
- UE capability information regarding whether to support subslot-based PUCCH repetition may be defined.
- UE capability information regarding whether to support sub-slot-based PUCCH repetition for slot-based PUCCH configuration may be defined.
- the user terminal 20 may connect to at least one of the multiple base stations 10 .
- the user terminal 20 may utilize at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).
- CA carrier aggregation
- CC component carriers
- DC dual connectivity
- the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the control unit 110 may control signal generation, scheduling (eg, resource allocation, mapping), and the like.
- the control unit 110 may control transmission/reception, measurement, etc. using the transmission/reception unit 120 , the transmission/reception antenna 130 and the transmission line interface 140 .
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer them to the transmission/reception unit 120 .
- the control unit 110 may perform call processing (setup, release, etc.) of communication channels, state management of the base station 10, management of radio resources, and the like.
- the transmitting/receiving section 120 may include a baseband section 121 , a radio frequency (RF) section 122 and a measuring section 123 .
- the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212 .
- the transmitting/receiving unit 120 is configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure. be able to.
- the transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission section may be composed of the transmission processing section 1211 and the RF section 122 .
- the receiving section may be composed of a reception processing section 1212 , an RF section 122 and a measurement section 123 .
- the transmitting/receiving unit 120 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
- digital beamforming eg, precoding
- analog beamforming eg, phase rotation
- the transmission/reception unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control for example, HARQ retransmission control
- this example mainly shows the functional blocks of the features of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
- the control unit 210 controls the user terminal 20 as a whole.
- the control unit 210 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
- the transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (error correction) on the acquired baseband signal. decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmitting/receiving unit 220 sets configuration information related to a first uplink control channel corresponding to the first transmission period unit and a second uplink control channel corresponding to a second transmission period unit shorter than the first transmission period unit. may receive at least one of:
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be similarly implemented.
- the memory 1002 is a computer-readable recording medium, such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or at least any other suitable storage medium. may be configured by one.
- the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
- the memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (PUSCH) Mapping Type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.
- the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
- the short TTI e.g., shortened TTI, etc.
- a TTI having the above TTI length may be read instead.
- a Bandwidth Part (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier.
- the common RB may be identified by an RB index based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP for UL
- BWP for DL DL BWP
- One or multiple BWPs may be configured for a UE within one carrier.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indicated by a predetermined index.
- information, signals, etc. can be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
- Information, signals, etc. may be input and output through multiple network nodes.
- Uplink Control Information (UCI) Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- SIB System Information Block
- MAC Medium Access Control
- Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
- a “network” may refer to devices (eg, base stations) included in a network.
- base station BS
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission Point (TP)”, “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
- the base station in the present disclosure may be read as a user terminal.
- communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
- the user terminal 20 may have the functions of the base station 10 described above.
- words such as "uplink” and “downlink” may be replaced with words corresponding to communication between terminals (for example, "sidelink”).
- uplink channels, downlink channels, etc. may be read as sidelink channels.
- each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.
- determining includes judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry ( For example, looking up in a table, database, or another data structure), ascertaining, etc. may be considered to be “determining.”
- determining (deciding) includes receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access ( accessing (e.g., accessing data in memory), etc.
- Maximum transmit power described in this disclosure may mean the maximum value of transmit power, may mean the nominal maximum transmit power (the nominal UE maximum transmit power), or may mean the rated maximum transmit power (the rated UE maximum transmit power).
- connection refers to any connection or coupling, direct or indirect, between two or more elements. and can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other. Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
- radio frequency domain when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, radio frequency domain, microwave They can be considered to be “connected” or “coupled” together using the domain, electromagnetic energy having wavelengths in the optical (both visible and invisible) domain, and the like.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean that "A and B are different from C”.
- Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
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Abstract
Description
Rel.15/16のPUCCHフォーマット1/3/4において、スロットベース(slot based)PUCCH繰り返し(repetition)がサポートされている。
[規定1-1]
UEは、N_PUCCH^repeat個のスロットにわたってUCIを伴うPUCCH送信を繰り返す。
[規定1-2]
N_PUCCH^repeat個のスロットのそれぞれにおけるPUCCH送信は、同じ数の連続シンボルを有する。そのシンボル数は、PUCCHフォーマット1情報要素PUCCH-format1内のシンボル数情報要素nrofsymbols、又は、PUCCHフォーマット3情報要素PUCCH-format3内のシンボル数情報要素nrofsymbols、又は、PUCCHフォーマット3情報要素PUCCH-format3内のシンボル数情報要素nrofsymbols、によって提供される。
[規定1-3]
N_PUCCH^repeat個のスロットのそれぞれにおけるPUCCH送信は、同じ最初のシンボル(開始シンボルインデックス)を有する。その最初のシンボルは、PUCCHフォーマット1情報要素PUCCH-format1内の開始シンボルインデックス情報要素startingSymbolIndex、又は、PUCCHフォーマット3情報要素PUCCH-format3内の開始シンボルインデックス情報要素startingSymbolIndex、又は、PUCCHフォーマット3情報要素PUCCH-format3内の開始シンボルインデックス情報要素startingSymbolIndex、によって提供される。
Rel.16において、サブスロットベース(sub-slot based)HARQ-ACK PUCCHがサポートされている。サブスロットの長さ(例えば、シンボル長/シンボル数)は、PUCCHの設定情報(例えば、上位レイヤパラメータPUCCH-config)に含まれるサブスロット長に関する情報(例えば、subslotLengthForPUCCH)により指示されてもよい。サブスロット長として、例えば、2シンボル又は7シンボルが設定されてもよい。もちろんシンボル数はこれに限られない。
[規定2-1]
もしUEが、第1のPUCCH-Config内においてサブスロット長subslotLengthForPUCCHを提供された場合、優先度(priority)インデックス0を伴う任意のscheduling request(SR)設定、又は、任意のPUCCH-Config内のchannel state information(CSI)報告設定、のためのPUCCHリソースは、その第1のPUCCH-Config内のsubslotLengthForPUCCH内にある。
[規定2-2]
もしUEが、第2のPUCCH-Config内においてサブスロット長subslotLengthForPUCCHを提供された場合、優先度(priority)インデックス1を伴う任意のscheduling request(SR)設定、又は、任意のPUCCH-Config内のchannel state information(CSI)報告設定、のためのPUCCHリソースは、その第2のPUCCH-Config内のsubslotLengthForPUCCH内にある。
Rel.17において、サブスロットベースPUCCH繰り返しがサポートされることが検討されている。例えば、サブスロットベースPUCCHについて、Rel.16のスロットベースPUCCH手順に基ついてHARQ-ACK用のサブスロットベースPUCCH繰り返しがサポートされること、Rel.17におけるサブスロットベースPUCCHに対しても動的繰り返し指示がサポートされること、サブスロットベースPUCCH繰り返しに対してPUCCHフォーマット0及び2に対するPUCCH繰り返しがサポートされること、が検討されている。
<第1の実施形態>
第1の実施形態では、スロットより短い送信時間単位をベースとしたPUCCH繰り返しが、当該スロットより短い送信時間単位をベースとする設定情報に対応するPUCCHリソースに対してサポートされる場合について説明する。
第2の実施形態では、サブスロットベースのPUCCHの繰り返しが、スロットベースのPUCCH設定情報/サブスロットベースのPUCCH設定情報に対応するPUCCHリソースに対してサポートされる場合について説明する。
サブスロットベースのPUCCH設定情報(例えば、sub-slot based PUCCH-Config)に対して、PUCCH繰り返しは、サブスロット長さに関する情報(例えば、上位レイヤパラメータsubslotLengthForPUCCH)により指示/定義されたサブスロット毎に行われてもよい。
スロットベースのPUCCH設定情報(例えば、slot based PUCCH-Config)に対して、PUCCH繰り返しは、所定の繰り返しサブスロット(repetition sub-slot)毎に行われてもよい。スロットベースのPUCCH設定情報に対応するPUCCHリソース(又は、サブスロット)の決定は、PUCCH設定情報にサブスロット長さに関する情報(例えば、上位レイヤパラメータsubslotLengthForPUCCH)が含まれない場合に行われてもよい。
所定の繰り返しサブスロット(repetition sub-slot)は、PUCCH設定情報(例えば、PUCCH-Config)におけるRRCの設定に含まれてもよい。例えば、サブスロット長さを指定する所定の上位レイヤパラメータ(例えば、新規の上位レイヤパラメータsubslotLengthForPUCCHRepetition-r17)として、PUCCH設定情報に含まれてもよい。
所定の繰り返しサブスロット(repetition sub-slot)は、PUCCHの長さ(例えば、PUCCHの割当てシンボル数)に基づいて決定されてもよい(例えば、back-to-back PUCCH repetition)。PUCCHの長さは、上位レイヤとDCIで指定されるPUCCHリソース(例えば、PUCCHリソースに含まれるPUCCHフォーマットに対応するPUCCHシンボル数)に基づいて決定されてもよい。この場合、各サブスロットベースのPUCCH繰り返しは、連続するシンボルで行われてもよい(図3B参照)。
上記第1の実施形態~第2の実施形態において、以下のUE能力(UE capability)が設定されてもよい。なお、以下のUE能力は、ネットワーク(例えば、基地局)からUEに設定するパラメータ(例えば、上位レイヤパラメータ)と読み替えられてもよい。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図5は、一実施形態に係る基地局の構成の一例を示す図である。基地局10は、制御部110、送受信部120、送受信アンテナ130及び伝送路インターフェース(transmission line interface)140を備えている。なお、制御部110、送受信部120及び送受信アンテナ130及び伝送路インターフェース140は、それぞれ1つ以上が備えられてもよい。
図6は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号(reference signal)は、RSと略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(Component Carrier(CC))は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- 第1の送信期間単位に対応する第1の上りリンク制御チャネルに関する設定情報と、前記第1の送信期間単位より短い第2の送信期間単位に対応する第2の上りリンク制御チャネルに関する設定情報と、の少なくとも一つを受信する受信部と、
前記第2の上りリンク制御チャネルの繰り返し送信を行う場合、前記第1の上りリンク制御チャネルに関する設定情報と、前記第2の上りリンク制御チャネルに関する設定情報と、の少なくとも一つに基づいて、前記繰り返し送信に利用する上りリンク制御チャネルリソースを判断する制御部と、を有する端末。 - 前記第2の上りリンク制御チャネルの繰り返し送信に利用する前記上りリンク制御チャネルリソースに関する情報は、前記第2の送信期間単位を指示する情報に関連づけて設定される請求項1に記載の端末。
- 前記制御部は、前記第2の送信期間単位を指示する情報とは別に設定される繰り返し送信用の前記第2の送信期間単位を指示する情報に基いて、前記第2の上りリンク制御チャネルの繰り返し送信を制御する請求項1に記載の端末。
- 前記制御部は、前記繰り返し送信を行う前記第2の上りリンク制御チャネルの長さに基づいて、前記繰り返し送信に利用する上りリンク制御チャネルリソースを判断する請求項1に記載の端末。
- 第1の送信期間単位に対応する第1の上りリンク制御チャネルに関する設定情報と、前記第1の送信期間単位より短い第2の送信期間単位に対応する第2の上りリンク制御チャネルに関する設定情報と、の少なくとも一つを受信する工程と、
前記第2の上りリンク制御チャネルの繰り返し送信を行う場合、前記第1の上りリンク制御チャネルに関する設定情報と、前記第2の上りリンク制御チャネルに関する設定情報と、の少なくとも一つに基づいて、前記繰り返し送信に利用する上りリンク制御チャネルリソースを判断する工程と、を有する端末の無線通信方法。 - 第1の送信期間単位に対応する第1の上りリンク制御チャネルに関する設定情報と、前記第1の送信期間単位より短い第2の送信期間単位に対応する第2の上りリンク制御チャネルに関する設定情報と、の少なくとも一つを端末に送信する送信部と、
前記端末において前記第2の上りリンク制御チャネルの繰り返し送信が行われる場合、前記第1の上りリンク制御チャネルに関する設定情報と、前記第2の上りリンク制御チャネルに関する設定情報と、の少なくとも一つに基づいて決定される上りリンク制御チャネルリソースに基づいて、前記繰り返し送信の受信を制御する制御部と、を有する基地局。
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