WO2018012614A1 - Terminal device and method - Google Patents

Abstract

This terminal device comprises: a transmission unit that transmits, on the basis of a first resource pool list and a second resource pool list, a first side-link physical channel and a demodulation reference signal (DMRS) related to the first side-link physical channel; and a resource setting unit that selects the first resource pool list or the second resource pool list on the basis of the rate of the terminal device. The resource setting unit selects a first resource pool from the first resource pool list when the rate of the terminal device does not exceed a first threshold, and selects a second resource pool from the second resource pool list when the rate of the terminal device exceeds the first threshold.

Description

Terminal apparatus and method

Embodiments described herein relate generally to a technology of a terminal device and a method for realizing efficient communication.
This application claims priority on Japanese Patent Application No. 2016-140065 filed in Japan on July 15, 2016, the contents of which are incorporated herein by reference.

In the standardization project 3GPP (3rd General Partnership Project), EUTRA (High-speed communication is realized by adopting OFDM (Orthogonal Frequency Frequency Division) Multiplexing (OFDM) communication method and flexible scheduling of predetermined frequency and time units called resource blocks. Evolved (Universal Terrestrial Radio Access) has been standardized. Note that communication in general that employs standardized technology in EUTRA may be referred to as LTE (Long Term Evolution) communication.

Also, 3GPP is studying A-EUTRA (Advanced） EUTRA), which realizes higher-speed data transmission and has upward compatibility with EUTRA. In EUTRA, a communication system is premised on a network in which base station apparatuses have substantially the same cell configuration (cell size). However, in A-EUTRA, base station apparatuses (cells) having different configurations are mixed in the same area. Communication systems based on existing networks (heterogeneous wireless networks, heterogeneous networks) are being studied.

Furthermore, in 3GPP, a technique for realizing a V2X (Vehicle Everything) service is being studied (Non-Patent Document 1).

In communication devices (terminal devices and / or base station devices), there are cases where efficient communication cannot be performed with conventional transmission control.

The present invention has been made in view of the above points, and an object of the present invention is to provide a terminal device and method capable of performing transmission control for efficient communication.

(1) In order to achieve the above object, the present invention has taken the following measures. That is, the terminal device according to an aspect of the present invention has the following means in order to achieve the above-described object. That is, the terminal device according to an aspect of the present invention provides the first side link physical channel and the first side link physical channel based on the first resource pool list and the second resource pool list. A transmission unit that transmits a related DMRS (Demodulation Reference Signal), and a resource setting unit that selects the first resource pool list or the second resource pool list based on the speed of the terminal device, The resource setting unit selects a first resource pool from the first resource pool list when the speed of the terminal device does not exceed a first threshold, and the speed of the terminal device The second resource pool is selected from the second resource pool list, and the TT of the first resource pool is selected. The mapping of the first side link physical channel in I (Transmission Time Interval) and / or the mapping of the DMRS is the mapping of the first side link physical channel in the TTI of the second resource pool and / or Different from the DMRS mapping.

(2) Moreover, the method according to the aspect of the present invention includes a first side link physical channel and the first side link physical based on the first resource pool list and the second resource pool list. Transmitting a DMRS (Demodulation Reference Signal) related to a channel; selecting the first resource pool list or the second resource pool list based on a speed of the terminal device; and the terminal device If the speed of the terminal device does not exceed the first threshold, the step of selecting the first resource pool from the first resource pool list, and the speed of the terminal device exceeds the first threshold Selecting a second resource pool from the second resource pool list, the TTI of the first resource pool The mapping of the first side link physical channel in (TransmissionＤＭTimeＤＭInterval) and / or the mapping of the DMRS is the mapping of the first side link physical channel in the TTI of the second resource pool and / or the Different from DMRS mapping.

According to the present invention, transmission efficiency can be improved in a wireless communication system in which a base station device and a terminal device communicate.

It is a figure which shows an example of a radio frame structure of the downlink which concerns on 1st Embodiment. It is a figure which shows an example of the radio | wireless frame structure of the uplink and / or side link which concern on 1st Embodiment. It is a figure which shows an example of the mapping pattern of the side link physical channel which concerns on 1st Embodiment, and related DMRS. It is a figure which shows an example of the block configuration of the base station apparatus which concerns on 1st Embodiment. It is a figure which shows an example of the block configuration of the terminal device which concerns on 1st Embodiment.

<First Embodiment>
A first embodiment of the present invention will be described below. A base station apparatus (base station, node B, eNB (EUTRAN NodeB, evolved NodeB)) and a terminal apparatus (terminal, mobile station, user apparatus, UE (User equipment)) will be described using a communication system in a cell. To do.

The main physical channel, physical signal, and frame structure used in this embodiment will be described. A channel means a medium used for signal transmission, and a physical channel means a physical medium used for signal transmission. In this embodiment, a physical channel may be used synonymously with a physical signal. The physical channel may be added in the future in LTE, or its structure / configuration and format may be changed or added. However, even if the physical channel is changed or added, the description of each embodiment of the present invention is not affected.

The frame structure type according to this embodiment will be described.

Frame structure type 1 (FS1) is applied to FDD (Frequency Division Division Duplex). That is, FS1 is applied to cell operations in which FDD is supported. The FS1 can be applied to both FD-FDD (Full Duplex-FDD) and HD-FDD (Half Duplex-FDD).

In FDD, downlink transmission and uplink transmission are separated in the frequency domain. In other words, an operating band is defined for each of downlink transmission and uplink transmission. That is, different carrier frequencies are applied for downlink transmission and uplink transmission. Therefore, in FDD, 10 subframes can be used for each of downlink transmission and uplink transmission. In the HD-FDD operation, the terminal device cannot simultaneously transmit and receive, but in the FD-FDD operation, the terminal device can simultaneously transmit and receive.

In the HD-FDD operation, the terminal device cannot simultaneously transmit and receive, but in the FD-FDD operation, the terminal device can simultaneously transmit and receive.

Furthermore, there are two types of HD-FDD. For Type A HD-FDD operation, the guard period is not received by the terminal device by not receiving the tail part (the last symbol) of the downlink subframe immediately before the uplink subframe from the same terminal device. Generated. For type B HD-FDD operation, the guard period, referred to as the HD guard subframe, is the same by not receiving the downlink subframe immediately before the uplink subframe from the same terminal equipment, and the same It is generated by the terminal device by not receiving the downlink subframe immediately after the uplink subframe from the terminal device. That is, in the HD-FDD operation, the terminal apparatus generates a guard period by controlling the downlink subframe reception process. Note that the symbol may include either an OFDM symbol or an SC-FDMA symbol.

Frame structure type 2 (FS2) is applied to TDD (Time Division Division Duplex). That is, FS2 is applied to cell operations in which TDD is supported. Each radio frame is composed of two half frames. Each half frame is composed of five subframes. The UL-DL configuration in a cell may be changed between radio frames. Control of subframes in uplink or downlink transmission may be performed in the latest radio frame. The terminal device can acquire the UL-DL configuration in the latest radio frame via PDCCH or higher layer signaling. The UL-DL setting indicates the configuration of an uplink subframe, a downlink subframe, and a special subframe in TDD. The special subframe is composed of DwPTS (Downlink Pilot Time Slot) capable of downlink transmission, guard period (GP), and UpPTS (Uplink Pilot Time Slot) capable of uplink transmission. The configurations of DwPTS and UpPTS in the special subframe are managed in a table, and the terminal device can acquire the configurations via higher layer signaling. The special subframe is a switching point from the downlink to the uplink. That is, the terminal device transitions from reception to transmission at the switching point, and the base station device transitions from transmission to reception. Switching points have a 5 ms period and a 10 ms period. If the switching point is a 5 ms period, the special subframe is present in both half frames. When the switching point has a 10 ms period, the special subframe exists only in the first half frame.

When 2 symbols are allocated to UpPTS, SRS (Sounding Reference Signal) and PRACH (Physical Random Access Channel) preamble format 4 can be arranged.

In TDD, eIMTA (TDDTDenhanced Interference Management and Traffic Adaptation) technology that considers the traffic (traffic amount) and interference of each cell is applicable. The eITMA dynamically switches the TDD setting (using the L1 (Layer 1) level or L1 signaling) in consideration of the downlink and / or uplink traffic and interference. This is a technique for performing optimal communication by changing the proportion of downlink subframes and uplink subframes in 10 subframes.

NCP (Normal Cyclic Prefix) and ECP (Extended Cyclic Prefix) are applied to FS1 and FS2.

Frame structure type 3 (FS3) is applied to LAA (Licensed Assisted Access) secondary cell operation. Further, only NCP may be applied to FS3. Ten subframes included in the radio frame are used for downlink transmission. Unless otherwise specified or unless downlink transmission is detected in the subframe, the terminal device does not assume that any signal is present in a subframe and processes the subframe as an empty subframe. A downlink transmission occupies one or more consecutive subframes. The continuous subframe includes a first subframe and a last subframe. The first subframe begins with any symbol or slot (eg, OFDM symbol # 0 or # 7) of that subframe. Also, the last subframe is occupied by the full subframe (ie, 14 OFDM symbols) or the number of OFDM symbols indicated based on one of the DwPTS periods. Whether or not a certain subframe is the last subframe among consecutive subframes is indicated to the terminal device by a certain field included in the DCI format. The field may further indicate the number of OFDM symbols used in the subframe in which the field is detected or the next subframe. In FS3, the base station apparatus performs a channel access procedure related to LBT before performing downlink transmission.

In FS3, only downlink transmission is supported, but uplink transmission may also be supported. At this time, FS3 supporting only downlink transmission may be defined as FS3-1 or FS3-A, and FS3 supporting downlink transmission and uplink transmission may be defined as FS3-2 or FS3-B.

Terminal devices and base station devices that support FS3 may communicate in a frequency band that does not require a license.

The operating band corresponding to the cell of LAA or FS3 may be managed together with the EUTRA operating band table. For example, the EUTRA operating band index may be managed from 1 to 44, and the operating band index corresponding to LAA (or LAA frequency) may be managed at 46. For example, in the index 46, only the downlink frequency band may be defined. Further, in some indexes, an uplink frequency band may be reserved in advance as reserved or specified in the future. Further, the corresponding duplex mode may be a duplex mode different from FDD or TDD, or may be FDD or TDD. The frequency at which the LAA operation is possible is preferably 5 GHz or more, but may be 5 GHz or less. That is, LAA operation communication may be performed at an associated frequency as an operating band corresponding to LAA.

Next, downlink and uplink radio frame configurations according to the present embodiment will be described.

FIG. 1 is a diagram illustrating an example of a downlink radio frame configuration according to the present embodiment. An OFDM access scheme is used for the downlink.

In downlink radio communication from the base station apparatus to the terminal apparatus, the following downlink physical channels may be used. Here, the downlink physical channel may be used to transmit information output from an upper layer.
・ PBCH (Physical Broadcast Channel)
・ PCFICH (Physical Control Format Indicator Channel)
・ PHICH (Physical Hybrid automatic repeat request Indicator Channel)
・ PDCCH (Physical Downlink Control Channel)
・ EPDCCH (Enhanced Physical Downlink Control Channel)
・ SPDCCH (short / shorter / shortened Physical Downlink Control Channel, PDCCH for sTTI)
・ PDSCH (Physical Downlink Shared Channel)
・ SPDSCH (short / shorter / shortened Physical Downlink Shared Channel, PDSCH for sTTI)
・ PMCH (Physical Multicast Channel)

In downlink radio communication, the following downlink physical signals may be used. Here, the downlink physical signal is not used for transmitting information output from the upper layer, but is used by the physical layer.
・ Synchronization signal (SS)
・ Downlink Reference Signal (DL RS)
・ DS (Discovery Signal)

In this embodiment, the following five types of downlink reference signals may be used.
-CRS (Cell-specific Reference Signal)
-URS (UE-specific Reference Signal) related to PDSCH
DMRS (Demodulation Reference Signal) related to EPDCCH
NZP CSI-RS (Non-Zero Power Chanel State Information-Reference Signal)
・ ZP CSI-RS (Zero Power Chanel State Information-Reference Signal)
MBSFN RS (Multimedia Broadcast and Multicast Service over Single Frequency Network Reference signal)
・ PRS (Positioning Reference Signal)

The downlink radio frame is composed of a downlink resource block (RB) pair. This downlink RB pair is a unit such as downlink radio resource allocation, and is based on a predetermined frequency band (RB bandwidth) and time band (2 slots = 1 subframe). Become. One downlink RB pair is composed of two downlink RBs (RB bandwidth × slot) that are continuous in the time domain. One downlink RB is composed of 12 subcarriers in the frequency domain. Further, in the time domain, it is composed of 7 OFDM symbols when NCP is added and 6 OFDM symbols when ECP having a CP length longer than NCP is added. A region defined by one subcarrier in the frequency domain and one OFDM symbol in the time domain is referred to as a resource element (RE). The PDCCH / EPDCCH is a physical channel through which downlink control information (DCI) such as a terminal device identifier, PDSCH scheduling information, PUSCH (Physical-Uplink-Shared-Channel) scheduling information, modulation scheme, coding rate, and retransmission parameter is transmitted. is there. In addition, although the downlink sub-frame in one component carrier (CC) is described here, a downlink sub-frame is prescribed | regulated for every CC, and a downlink sub-frame is substantially synchronized between CC. Here, “almost synchronized between CCs” means that when transmission is performed from a base station apparatus using a plurality of CCs, an error in transmission timing of each CC falls within a predetermined range.

Although not shown here, SS, PBCH, and DLRS may be arranged in the downlink subframe. DLRS includes CRS transmitted on the same antenna port (transmission port) as PDCCH, CSI-RS used for measurement of channel state information (CSI), URS transmitted on the same antenna port as some PDSCHs, EPDCCH, and so on. There is a DMRS transmitted on the same transmission port. Moreover, the carrier in which CRS is not arrange | positioned may be sufficient. At this time, in some subframes (for example, the first and sixth subframes in the radio frame), as a time and / or frequency tracking signal, some antenna ports (for example, antenna port 0 Only) or a signal similar to a signal corresponding to all antenna ports (referred to as an extended synchronization signal) can be inserted. Here, the antenna port may be referred to as a transmission port. Here, “physical channel / physical signal is transmitted through an antenna port” includes the meaning that a physical channel / physical signal is transmitted using a radio resource or layer corresponding to the antenna port. For example, the reception unit means receiving a physical channel or a physical signal from a radio resource or layer corresponding to the antenna port.

FIG. 2 is a diagram illustrating an example of an uplink radio frame configuration according to the present embodiment. The SC-FDMA scheme is used for the uplink.

In uplink wireless communication from the terminal device to the base station device, the following uplink physical channels may be used. Here, the uplink physical channel is used for transmitting information output from an upper layer.
-PUCCH (Physical Uplink Control Channel)
・ SPUCCH (short / shorter / shortened Physical Uplink Control Channel, PUCCH for short TTI)
・ PUSCH (Physical Uplink Shared Channel)
・ SPUSCH (short / shorter / shortened Physical Uplink Shared Channel, PUSCH for short TTI)
・ PRACH (Physical Random Access Channel)
・ SPRACH (short / shorter / shortened Physical Random Access Channel, PRACH for short TTI)

In uplink wireless communication, the following uplink physical signals may be used. Here, the uplink physical signal is not used for transmitting information output from the upper layer, but is used by the physical layer.
・ Uplink Reference Signal (UL RS)

In the present embodiment, the following two types of uplink reference signals may be used.
DMRS (Demodulation Reference Signal)
・ SRS (Sounding Reference Signal)

The parameters used to configure physical channels and / or physical signals for the downlink and / or uplink described above are physical layer signals (eg, PDCCH) and / or higher layer signals (eg, RRC signaling, It may be notified and set from the base station device to the terminal device via MAC CE (system information).

In the uplink, PUSCH (Physical Uplink Shared Channel), PUCCH (Physical Uplink Control Channel), etc. are allocated. Also, ULRS (Uplink Reference Signal) is assigned together with PUSCH and PUCCH. The uplink radio frame is composed of uplink RB pairs. This uplink RB pair is a unit for allocation of uplink radio resources and the like, from a frequency domain (RB bandwidth) and a time domain (2 slots = 1 subframe) having a predetermined width. Become. One uplink RB pair is composed of two uplink RBs (RB bandwidth × slot) that are continuous in the time domain. One uplink RB is composed of 12 subcarriers in the frequency domain. In the time domain, it is composed of 7 SC-FDMA symbols when NCP is added and 6 when ECP is added. In addition, although the uplink sub-frame in one CC is described here, an uplink sub-frame may be defined for each CC.

1 and 2 show examples in which different physical channels / physical signals are frequency division multiplexed (FDM) and / or time division multiplexed (TDM).

When various physical channels and / or physical signals are transmitted for sTTI (short / shorter / shortened Transmission Time Interval), each physical channel and / or physical signal is sPDSCH, sPDCCH, sPUSCH, sPUCCH, respectively. , May be referred to as sPRACH.

When a physical channel is transmitted for sTTI, the number of OFDM symbols and / or SC-FDMA symbols constituting the physical channel is equal to or less than 14 symbols in NCP (12 symbols in ECP). Also good. Also, the number of symbols used for the physical channel for sTTI may be set using DCI and / or DCI format, or may be set using higher layer signaling. In addition to the number of symbols used in sTTI, a start symbol in the time direction may be set.

STTI may also be transmitted within a specific bandwidth within the system bandwidth. The bandwidth set as sTTI may be set using DCI and / or DCI format, or may be set using higher layer signaling (RRC signaling, MAC CE). The bandwidth may be set using a start and end resource block index or frequency position, or may be set using a bandwidth and start resource block index / frequency position. A bandwidth to which sTTI is mapped may be referred to as an sTTI band. A physical channel mapped within the sTTI band may be referred to as a physical channel for sTTI. The physical channel for sTTI may include sPDSCH, sPDCCH, sPUSCH, sPUCCH, and sPRACH.

If the information / parameters used to define the sTTI are set using DCI and / or DCI format, those DCI and / or DCI formats may be scrambled using a specific RNTI, A CRC scrambled by the RNTI may be added to a bit string constituting the DCI format.

Here, the downlink physical channel and the downlink physical signal are collectively referred to as a downlink signal. Also, the uplink physical channel and the uplink physical signal are collectively referred to as an uplink signal. The downlink physical channel and the uplink physical channel are also collectively referred to as a physical channel. The downlink physical signal and the uplink physical signal are collectively referred to as a physical signal.

The PBCH is used to broadcast a master information block (MIB, “Broadcast” Channel: “BCH”) that is commonly used by terminal apparatuses.

PCFICH is used to transmit information indicating a region (number of OFDM symbols) used for transmission of PDCCH to a terminal apparatus (UE) and / or a relay station apparatus (RN). PCFICH is transmitted in all downlink or special subframes.

PHICH transmits a HARQ indicator (HARQ feedback, response information) indicating ACK (ACKnowledgement) or NACK (Negative ACKnowledgement) for uplink data (Uplink Shared Channel: UL-SCH) received by the base station apparatus (eNB). Used for. That is, PHICH is used to transmit HARQ-ACK (ACK / NACK) in response to uplink transmission.

PDCCH, EPDCCH, and / or sPDCCH are used to transmit downlink control information (DCI) and / or side link control information (SCI). In the present embodiment, the PDCCH may include an EPDCCH. Further, the PDCCH may include sPDCCH.

Here, a plurality of DCI formats may be defined for DCI transmitted by PDCCH, EPDCCH, and / or sPDCCH. The field for DCI defined in the DCI format may be mapped to a predetermined information bit.

Here, the DCI format and / or the SCI format may be defined for the SCI transmitted on the PDCCH, EPDCCH, and / or sPDCCH. Also, the field for SCI defined in the DCI format and / or SCI format may be mapped to predetermined information bits.

In a serving cell, that is, in a terminal device and a base station device in a serving cell, when a physical channel for sTTI can be transmitted, the terminal device has a DCI format (defined in the DCI format) including information / parameters for setting sTTI. Field) and / or PCICH / EPDCCH / sPDCCH to which the SCI format (field defined in the SCI format) is mapped may be monitored. That is, the base station apparatus, for a terminal apparatus that supports transmission and / or reception of a physical channel using sTTI, a DCI format including information / parameters for setting sTTI in PDCCH / EPDCCH / sPDCCH And / or SCI format may be mapped and transmitted.

Here, the DCI format for the downlink is also referred to as downlink DCI, downlink grant (DL grant), and / or downlink scheduling grant, and / or downlink assignment. The DCI format for uplink is also referred to as uplink DCI, uplink grant (UL grant), and / or uplink scheduling grant, and / or uplink assignment. The SCI format for the side link is also referred to as a side link grant (SL grant) and / or a side link scheduling grant and / or a side link assignment.

For example, as a downlink assignment, a DCI format (eg, DCI format 1, DCI format 1A, and / or DCI format 1C, or first DL grant used for scheduling of one PDSCH in one cell) ) May be defined.

Also, as an uplink grant, a DCI format (for example, DCI format 0 and / or DCI format 4 or a first UL grant) used for scheduling of one PUSCH in one cell is defined. Also good.

Further, as a side link grant, a DCI format (for example, DCI format 5 or first SL grant) used for scheduling of PSCCH (Physical Sidelink Control Channel) and / or PSSCH (Physical Sidelink Shared Channel) May be defined. The side link grant includes several fields (for example, a frequency hopping flag and a resource block assignment) defined in the SCI format (for example, SCI format 0 or the second SL grant) used for scheduling of the PSSCH. Element, time resource pattern).

When the terminal device and / or the base station device supports the ability to change the mapping pattern of the side link physical channel based on the speed of the terminal device, the field indicating the mapping pattern is provided in the side link grant. May be included, and a field indicating a resource pool included in a specific resource pool list and / or a specific setting may be included. The DCI format including these fields (at least one of these fields) may be referred to as DCI format 5B.

Here, when the PDSCH resource is scheduled using the downlink assignment, the terminal apparatus may receive the downlink data (DL-SCH) on the PDSCH based on the scheduling. In addition, when PUSCH resources are scheduled using the uplink grant, the terminal apparatus uses the PUSCH to transmit uplink data (UL-SCH) and / or uplink control information (UCI) based on the scheduling. You may send it. Moreover, when the resource of sPUSCH is scheduled using an uplink grant, a terminal device may transmit uplink data and / or uplink control information by sPUSCH based on scheduling.

SPDSCH may be scheduled by a first DL grant detected on PDCCH and / or EPDCCH and a second DL grant detected on sPDCCH. Both the first DL grant and the second DL grant may be scrambled using a specific RNTI.

SPDCCH may be configured to monitor sPDCCH (that is, downlink sTTI band) based on DCI included in the first DL grant detected by PDCCH and / or EPDCCH.

The resource of sPUCCH may be determined by DCI included in the second DL grant detected by sPDCCH.

In addition, the terminal device may monitor a set of PDCCH candidates, EPDCCH candidates, and / or sPDCCH candidates. Hereinafter, the PDCCH may include EPDDCH and / or sPDCCH.

Here, the PDCCH candidate may indicate a candidate that the PDCCH may be arranged and / or transmitted by the base station apparatus. In addition, monitoring may mean that the terminal device attempts to decode each PDCCH in the set of PDCCH candidates according to all the DCI formats to be monitored.

Here, the set of PDCCH candidates that the terminal device monitors is also referred to as a search space. The search space may include a common search space (CSS). For example, the CSS may be defined as a common space for a plurality of terminal devices.

Further, the search space may include a user equipment specific search space (USS). For example, the USS may be given based on at least a C-RNTI assigned to the terminal device. The terminal device may monitor the PDCCH and detect the PDCCH addressed to itself in CSS and / or USS.

RNTI assigned by the base station apparatus to the terminal apparatus may be used for DCI transmission (transmission on the PDCCH). Specifically, CRC (Cyclic Redundancy Check) parity bits may be added to the DCI format (which may be downlink control information), and after the CRC parity bits are added, the CRC parity bits may be scrambled by RNTI. Here, the CRC parity bit added to the DCI format may be obtained from the payload of the DCI format.

Here, in this embodiment, the “CRC parity bit”, “CRC bit”, and “CRC” may be the same. Also, “PDCCH in which a DCI format with CRC parity bits added is transmitted”, “PDCCH including CRC parity bits and including DCI format”, “PDCCH including CRC parity bits”, and “DCI format The “including PDCCH” may be the same. Further, “PDCCH including X” and “PDCCH with X” may be the same. The terminal device may monitor the DCI format. The terminal device may monitor DCI. The terminal device may monitor the PDCCH.

The terminal apparatus attempts to decode the DCI format to which the CRC parity bit scrambled by the RNTI is added, and detects the DCI format in which the CRC is successful as the DCI format addressed to itself (also referred to as blind decoding). ). That is, the terminal device may detect a PDCCH with a CRC scrambled by RNTI. Further, the terminal apparatus may detect a PDCCH accompanied by a DCI format to which a CRC parity bit scrambled by RNTI is added.

The RNTI may include a C-RNTI (Cell-Radio Network Temporary Identifier). For example, the C-RNTI may be a unique (unique) identifier for the terminal device used for RRC connection and scheduling identification. C-RNTI may also be used for dynamically scheduled unicast transmissions.

RNTI may include SPS C-RNTI (Semi-Persistent Scheduling C-RNTI). For example, SPS C-RNTI is a unique (unique) identifier for a terminal device used for semi-persistent scheduling. SPS C-RNTI may also be used for semi-persistently scheduled unicast transmissions. Here, semi-persistently scheduled transmission may include the meaning of periodically scheduled transmission.

RNTI may include RA-RNTI (Random Access RNTI). For example, the RA-RNTI may be an identifier used for transmission of a random access response message. That is, RA-RNTI may be used for transmission of a random access response message in a random access procedure. For example, when a random access preamble is transmitted, the terminal apparatus may monitor the PDCCH with a CRC scrambled by RA-RNTI. Further, the terminal apparatus may receive a random access response on the PDSCH based on detection of the PDCCH accompanied by the CRC scrambled by the RA-RNTI.

RNTI may include SL-RNTI (Sidelink RNTI). For example, SL-RNTI may be utilized for sidelink transmissions that are dynamically scheduled, that is, scheduled using L1 signaling (PDCCH, EPDCCH, sPDCCH). For example, the terminal device may monitor the PDCCH with a CRC scrambled by SL-RNTI when performing side link transmission.

If the terminal device is configured to receive a DCI format with a CRC scrambled by SL-RNTI (Sidelink RNTI), the terminal device may use CSS and USS PDCCHs according to C-RNTI and / or C- You may decode the EPDCCH of USS by RNTI.

Here, the PDCCH with CRC scrambled by C-RNTI may be transmitted in USS or CSS. Also, PDCCH with CRC scrambled by SPS C-RNTI may be transmitted in USS or CSS. Also, the PDCCH with CRC scrambled by RA-RNTI may be transmitted only in CSS.

The RNTI that scrambles the CRC includes RA-RNTI, C-RNTI, SPS C-RNTI, temporary C-RNTI, eIMTA-RNTI, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI, M-RNTI, P-RNTI, There are SI-RNTI and SL-RNTI.

RA-RNTI, C-RNTI, SPS C-RNTI, eIMTA-RNTI, TPC-PUCCH-RNTI, and TPC-PUSCH-RNTI are set from the base station apparatus to the terminal apparatus via higher layer signaling.

M-RNTI, P-RNTI and SI-RNTI correspond to one value. For example, P-RNTI corresponds to PCH and PCCH and is used to notify changes in paging and system information. SI-RNTI corresponds to DL-SCH and BCCH and is used for reporting system information. RA-RNTI corresponds to DL-SCH and is used for a random access response.

RA-RNTI, C-RNTI, SPS C-RNTI, temporary C-RNTI, eIMTA-RNTI, TPC-PUCCH-RNTI, and TPC-PUSCH-RNTI are set using higher layer signaling.

Predetermined values are defined for M-RNTI, P-RNTI, and SI-RNTI.

The PDCCH with CRC scrambled by each RNTI may have a different transport channel or logical channel depending on the value of the RNTI. That is, the information shown may differ depending on the value of RNTI.

One SI-RNTI is used to address SIB1, as with all SI messages.

PDSCH is used to transmit downlink data (Downlink Shared Channel: DL-SCH). The PDSCH is used for transmitting a system information message. Here, the system information message may be cell specific information. Further, the system information may be included in RRC signaling. PDSCH may also be used to transmit RRC signaling and MAC control elements.

PMCH is used to transmit multicast data (Multicast Channel: MCH).

The synchronization signal is used for the terminal device to synchronize the downlink frequency domain and time domain. In the TDD scheme, the synchronization signal is arranged in subframes 0, 1, 5, and 6 in the radio frame. In the FDD scheme, the synchronization signal is arranged in subframes 0 and 5 in the radio frame.

The downlink reference signal is used by the terminal device for channel correction of the downlink physical channel. Here, the downlink reference signal is used for the terminal device to calculate downlink channel state information.

DS is used for time-frequency synchronization, cell identification, and RRM (Radio Resource Management) measurement (intra and / or inter frequency measurement) at frequencies for which parameters related to DS are set. The DS is composed of a plurality of signals, and these signals are transmitted in the same cycle. The DS may be configured using PSS / SSS / CRS resources, and may further be configured using CSI-RS resources. In DS, RSRP and RSRQ may be measured using resources to which CRS and CSI-RS are mapped.

BCH, MCH, UL-SCH and DL-SCH are transport channels. A channel used in the medium access control (MAC) layer is called a transport channel. A transport channel unit used in the MAC layer is also referred to as a transport block (TB) or a MAC PDU (Protocol Data Unit). In the MAC layer, HARQ (HybridbrAutomatic Repeat reQuest) is controlled for each transport block. The transport block is a unit of data that the MAC layer delivers to the physical layer. In the physical layer, the transport block is mapped to a code word, and an encoding process is performed for each code word.

PUCCH and / or sPUCCH are used for transmitting (or feeding back) uplink control information (UCI). Hereinafter, PUCCH may include sPUCCH. Here, the UCI may include channel state information (CSI) used to indicate the state of the downlink channel. The UCI may also include a scheduling request (SR) used for requesting UL-SCH resources. The UCI may include HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement).

Here, HARQ-ACK may indicate HARQ-ACK for downlink data (Transport block, Medium access Control, Protocol, Data, Unit: MAC-PDU, Downlink-Shared Channel: DL-SCH, Physical Downlink Shared Channel: PDSCH). . That is, HARQ-ACK may indicate ACK (Acknowledgement, positive-acknowledgment) or NACK (Negative-acknowledgement) for downlink data. The CSI may also be configured with a channel quality indicator (CQI), a precoding matrix indicator (PMI), and / or a rank indication (RI). The HARQ-ACK may be referred to as a HARQ-ACK response.

The format of PUCCH and / or sPUCCH may be defined according to the type and combination of UCI to be transmitted (reported). Hereinafter, sPUCCH may be included in PUCCH.

For example, a PUCCH format for transmitting a positive SR may be defined.

For example, a PUCCH format for transmitting positive SR and / or HARQ-ACK may be defined.

For example, a PUCCH format for transmitting a 1-bit or more HARQ-ACK may be defined.

For example, a PUCCH format for transmitting CSI for one or more serving cells may be defined. Depending on the number of serving cells, the PUCCH format may be different.

For example, a PUCCH format for transmitting HARQ-ACK and / or CSI may be defined.

Depending on the type of PUCCH format, the number of symbols and the number of resource elements (resource blocks) allocated to PUCCH may be different within one subframe and / or within one TTI.

A cyclic shift value may be set for each PUCCH format.

PUSCH and / or sPUSCH is used to transmit uplink data (Uplink-Shared Channel: UL-SCH). Hereinafter, PUSCH may include sPUSCH. The PUSCH may also be used to transmit HARQ-ACK and / or CSI along with uplink data. Also, the PUSCH may be used to transmit only CSI, or only HARQ-ACK and CSI. That is, PUSCH may be used to transmit only UCI.

Here, the base station apparatus and the terminal apparatus may exchange (transmit / receive) signals in a higher layer. For example, the base station apparatus and the terminal apparatus may transmit and receive RRC signaling (also referred to as RRC message or RRC information) in a radio resource control (Radio Resource Control: RRC) layer. Further, the base station apparatus and the terminal apparatus may exchange (transmit / receive) MAC control elements in a MAC (Medium Access Control) layer. Here, the RRC signaling and / or the MAC control element is also referred to as a higher layer signal.

In the present embodiment, “CP is added to OFDM symbol and / or SC-FDMA symbol” means “CP sequence is added to physical channel sequence transmitted by OFDM symbol and / or SC-FDMA symbol”. May be synonymous.

In the present embodiment, the “upper layer parameter”, “upper layer message”, “upper layer signal”, “upper layer information”, and “upper layer information element” are the same. Also good.

Also, PUSCH may be used for transmitting RRC signaling and MAC control element (MAC CE). Here, the RRC signaling transmitted from the base station apparatus may be common signaling for a plurality of terminal apparatuses in the cell. Further, the RRC signaling transmitted from the base station apparatus may be signaling dedicated to a certain terminal apparatus (also referred to as dedicated signaling). That is, the user apparatus specific information may be transmitted to a certain terminal apparatus using dedicated signaling.

PRACH and / or sPRACH are used to transmit a random access preamble. Hereinafter, PRACH may include sPRACH. For example, PRACH (or random access procedure) is used mainly for the terminal device to synchronize the time domain with the base station device. In addition, PRACH (or random access procedure) includes initial connection establishment (initial connection establishment) procedure, handover procedure, connection re-establishment (connection re-establishment) procedure, synchronization for uplink transmission (timing adjustment), and scheduling request. It may also be used for transmission of (PUSCH resource request, UL-SCH resource request).

DMRS relates to transmission of PUSCH, sPUSCH, and / or PUCCH. That is, DMRS may be time-multiplexed with PUSCH, sPUSCH, or PUCCH. For example, the base station apparatus may use DMRS to perform PUSCH, sPUSCH, or PUCCH channel correction. Depending on the type of physical channel to be demodulated, the DMRS may have a different time-multiplexing arrangement or the number of DMRSs to be multiplexed.

SRS is not related to PUSCH or PUCCH transmission. For example, the base station apparatus may use SRS to measure uplink channel conditions or transmission timing. In the SRS, a trigger type 0 SRS to be transmitted when a related parameter is set by an upper layer signal, and a related parameter is set by an upper layer signal, and transmission is performed by an SRS request included in the uplink grant. There is a trigger type 1 SRS to send when requested.

Next, side link transmission and side link reception according to the present embodiment will be described. Since the side link reception can be realized by performing the reverse procedure of the side link transmission, detailed description is omitted. Side link transmission is transmission in a side link. Side link reception is reception in a side link. A side link is a link (interface) between terminal devices.

Side link transmission may be defined for side link discovery and side link communication between terminal devices (for example, between a first terminal device and a second terminal device). That is, the side link transmission may include at least one of side link discovery and side link communication. The side link transmission uses the same frame structure as that defined for the uplink and the downlink when the terminal apparatus (terminal apparatus capable of performing the side link transmission) is within the coverage of the network. However, side link transmission is limited to a subset of uplink resources in the time and frequency domains. That is, side link transmission is performed using resources for uplink transmission. Note that the fact that a terminal device capable of side link transmission is within the coverage of the network is referred to as in-coverage. The fact that a terminal device capable of side link transmission is not within the coverage of the network is called out-of-coverage. For example, when the terminal device can detect the network (cell), the terminal device may determine that it is in-coverage. For example, if the terminal device cannot detect a network (cell), the terminal device may determine that it is out of coverage. The side link transmission may be referred to as a side link.

Side link transmission may use the same transmission scheme as uplink transmission. In the side link, transmission of all side link physical channels may be limited to one cluster transmission. In side link transmission, one symbol gap may be used at the end of each side link subframe (that is, the last symbol). The last symbol of each side link subframe is not used for side link transmission.

In the side link wireless communication between the terminal device and another terminal device, the following side link physical channel may be used. Here, the side link physical channel is used to transmit information output from an upper layer.
・ PSSCH (Physical Sidelink Shared Channel)
・ PSCCH (Physical Sidelink Control Channel)
-PSDCH (Physical Sidelink Discovery Channel)
・ PSBCH (Physical Sidelink Broadcast Channel)

In the side link wireless communication between the terminal device and another terminal device, the following side link physical signal may be used. Here, the side link physical signal does not transmit information output from the upper layer.
・ Synchronization signal ・ DMRS (Demodulation Reference Signal)

Here, the side link physical channel and the side link physical signal are collectively referred to as a side link signal.

The parameters used for setting the physical channel and / or physical signal for the side link described above are physical layer signals (eg, PDCCH, PSCCH, PSBCH) and / or higher layer signals (eg, RRC signaling, MAC It may be notified and set from the base station apparatus and / or the terminal apparatus to other terminal apparatuses via CE (system information).

The resource elements in the last SC-FDMA symbol in the subframe are counted in the mapping process for each of PSSCH, PSCCH, PSDCH, and PSBCH. However, PSSCH, PSCCH, PSDCH, and PSBCH are not transmitted.

PSSCH is used to transmit data (data information, SL-SCH (Sidelink Shared Channel)) from a terminal device for side link communication.

The PSCCH is used to transmit control (control information, SCI) from the terminal device for side link communication. The PSCCH is used to indicate the resources used by the terminal apparatus for the PSSCH and other transmission parameters for the PSSCH. The PSCCH is mapped to the side link control resource.

SCI is used to transport side link scheduling information for one DST-ID (Destination ID). The fields for SCI are defined in the SCI format. The SCI is mapped to predetermined information bits.

SCI format 0 is used for scheduling of PSSCH. By using SCI format 0, frequency hopping, resource block assignment and hopping resource allocation, time resource pattern, MCS (Modulation Coding Scheme), TAI (Timing Advance Indication), G-DST-ID (Group Destination ID) are Sent.

If the terminal device supports the ability to change the mapping pattern in the resource pool based on the speed of the terminal device, the SCI format may include a field indicating the mapping pattern. The SCI format including this field may be referred to as SCI format 0B.

The SCI format 0B and / or the DCI format 5B may be accompanied by a CRC scrambled by an RNTI set for an in-vehicle terminal device.

DCI format 5 (5B) and / or if the terminal device, the other terminal device, and / or the base station device supports the ability to change the mapping pattern in the resource pool based on the speed of the terminal device The mapping pattern indicated by the field indicating the mapping pattern included in the SCI format 0 (0B) may correspond to system information and / or higher layer signaling including settings related to the resource pool. For example, the field for designating the mapping pattern may be a field for switching a resource pool for system information for pedestrian side link transmission and reception and a resource pool for system information for in-vehicle side link transmission and reception.

For the side link transmission mode 1, a terminal device that detects SCI format 0 using PSCCH can decode PSSCH corresponding to the detected SCI format 0. The terminal device in side link transmission mode 1 may use the PSCCH and / or the PSCCH based on the DCI format (for example, DCI format 5 or the first SL grant) used for scheduling of the PSSCH. , PSSCH transmission processing may be performed. Here, the PSCCH and / or PSSCH transmission processing may include PSCCH and / or PSSCH mapping processing and resource (resource pool) selection.

For the side link transmission mode 2, the terminal apparatus that detects SCI format 0 on the PSCCH decodes the related PSSCH resource setting set by the higher layer and the PSSCH corresponding to the detected SCI format 0. Can do. The terminal device in the side link transmission mode 2 may use the PSCCH and / or the PSCCH and / or regardless of the DCI format (for example, the DCI format 5 or the first SL grant) used for scheduling of the PSSCH. Alternatively, PSSCH transmission processing may be performed. Here, the PSCCH and / or PSSCH transmission processing may include PSCCH and / or PSSCH mapping processing and resource (resource pool) selection.

PSDCH is used to transmit a side link discovery message from a terminal device.

PSBCH is used to transmit information related to the system and synchronization transmitted from the terminal device. The PSBCH may include information on the speed of the terminal device that is transmitting the PSBCH.

When transmission and / or reception using sTTI is applied (supported) to each of PSSCH, PSCCH, PSDCH, and PSBCH, PSSCH, PSCCH, PSDCH, and PSBCH for sTTI are respectively sPSSCH, sPSSCCH, It may be referred to as sPSDCH or sPSBCH. Hereinafter, PSSCH, PSCCH, PSDCH, and PSBCH may include sPSSCH, sPSCCH, sPSDCH, and sPSBCH, respectively.

In the side link, there are PSSS (Primary Side Link Synchronization Signal) and SSSS (Secondary Side Link Synchronization Signal). By detecting PSSS and SSSS, the SL-ID may be indicated.

PSSS may be transmitted in two adjacent SC-FDMA symbols in the same subframe.

Each of the two sequences used for PSSS in two SC-FDMA symbols may be given by a certain root index. If the side link ID (SL-ID) is 167 or less, the route index is 26; otherwise, the route index is 37.

The sequence for PSSS is mapped to the resource element in the antenna port 1020 of the first slot of a certain subframe. In the case of NCP, the sequence for PSSS is mapped to symbol 1 and symbol 2 (the second symbol and the third symbol in the slot) of a first subframe in a certain subframe, and in the case of ECP, a certain subframe. Are mapped to symbols 0 and 1 (first and second symbols in the first slot) of the first slot.

SSSS is transmitted in two adjacent SC-FDMA symbols in the same subframe.

Each of the two sequences used for SSSS is given assuming a first ID (n ⁽¹⁾ _ID ), a second ID (n ⁽²⁾ _ID ), and subframe 0. The first ID is given by the remainder of the SL-ID divided by 168. The second ID is given by the floor function of SL-ID / 168 (applying the floor function to the solution of SL-ID divided by 168).

A sequence for SSSS is mapped to a resource element in antenna port 1020 of the second slot of a certain subframe. In the case of NCP, the sequence for SSSS is mapped to symbol 4 and symbol 5 in the second slot of a subframe, and in the case of ECP, the sequence is mapped to symbol 3 and symbol 4 in the second slot of a subframe. The

The side link synchronization signal (that is, PSSS and SSSS) may be transmitted by a terminal device and / or a base station device that supports side link transmission. The terminal device may receive the data on the assumption that it is transmitted from another terminal device and / or a base station device.

The terminal device is not expected to blindly detect the CP length of the side link synchronization signal transmitted by another terminal device.

The side link synchronization signal is transmitted in the same subframe and / or TTI as PSBCH.

The in-coverage terminal apparatus may transmit PSSS / SSSS corresponding to the SL-ID having the same value as the cell ID of the cell. The out-of-coverage terminal apparatus may transmit PSSS / SSSS corresponding to the SL-ID having a value different from the cell ID of the cell. The SL-ID having a value different from the cell ID of the cell may be a known value defined in advance by a specification or the like.

The terminal device may determine the SL-ID based on the speed of the terminal device. The terminal device may determine a PSSS / SSSS mapping processing method based on the speed of the terminal device. The terminal apparatus may determine the index of the symbol mapping PSSS / SSSS and the number of symbols based on the speed of the terminal apparatus.

In this embodiment, “TTI” may include sTTI. That is, in this embodiment, “TTI” may include at least one TTI length. For example, “TTI” may include a TTI composed of two symbols, may include a TTI composed of 14 symbols, or may include a TTI having a length other than this.

DMRS (S-DMRS) in the side link is used to demodulate PSDCH, PSCCH, and PSSCH. S-DMRS is similar to DMRS, which is one of uplink reference signals. In the case of NCP, the S-DMRS is transmitted by the fourth symbol in the slot, and in the case of ECP, the S-DMRS is transmitted by the third symbol in the slot. The sequence length for S-DMRS is the same as the allocated resource size (that is, the number of subcarriers).

The set of physical resource blocks used for the mapping process for PSDCH / PSCCH / PSSCH / PSBCH transmission has the same definition as the set of physical resource blocks used for the mapping process for PUSCH. That is, the mapping for PSDCH / PSCCH / PSSCH / PSBCH transmission may be the same mapping as the mapping of the PUSCH region in FIG. 2 and / or the mapping without the PUCCH region.

The index k (frequency direction index) in the mapping process of S-DMRS for PSDCH / PSCCH / PSSCH / PSBCH transmission has the same definition as the index k in the mapping process of DMRS for PUSCH.

The pseudo random sequence generator is initialized at the beginning of each slot where the slot number of PSSCH satisfies 0.

For PSDCH and PSCCH, S-DMRS is generated based on a fixed reference sequence, cyclic shift, and orthogonal cover code (OCC).

For the in-coverage operation, the power spectrum density of the side link transmission may be set by the base station apparatus. That is, in the in-coverage operation, the base station apparatus may set the power control parameter related to the side link transmission to the terminal apparatus that supports the side link transmission and transmit the power control parameter via the higher layer signaling.

For side link measurements, S-RSRP (Sidelink Signal Received Power) and / or SD-RSRP (Sidelink Discovery RSRP) may be supported as a measurement amount on the terminal device side.

S-RSRP is a linear average (or linear average value) of power values (Power Contribution expressed in [W]) of resource elements that transmit DMRS related to PSBCH within 6 PRBs in the center of applicable subframes. Is defined as That is, S-RSRP may be the average received power of DMRS related to PSBCH.

SD-RSRP is defined as a linear average (or linear average value) in the power value (Power Contribution expressed in [W]) of a resource element that transmits a DMRS related to PSDCH for which CRC is valid. That is, SD-RSRP may be the average received power of DMRS related to PSDCH.

A resource pool list is set for each of the side link communication and the side link discovery, and the terminal device selects a resource pool (that is, a setting related to the resource pool) from the corresponding resource pool list and transmits it. To do.

The SIB corresponding to side link communication (for example, SIB 18 (System Information Block Type 18)) may include settings related to side link communication.

The SIB 18 provides resource information for side link synchronization signals and SBCCH transmission.

Settings related to side link communication include resource pool list used for reception, resource pool list used for transmission under normal conditions, resource pool list used for transmission under exceptional conditions, and settings related to synchronization for side link communication. May be.

The SIB corresponding to side link discovery (for example, SIB19 (System Information BlockType 19)) may include settings related to side link discovery.

The setting related to side link discovery may include a resource pool list used for reception, a resource pool list used for transmission, information about transmission power, and settings related to synchronization for side link discovery.

The resource pool list may include settings related to one or more resource pools.

The settings related to the resource pool are used for the CP length, the period in which resources are allocated to the side links, the settings related to time frequency resources, the CP length for data, the hopping settings for data, the resource settings selected by the terminal device, and reception Parameters may be included.

The setting related to the time frequency resource may include the number of physical resource blocks (PRB), the PRB start index, the PRB end index, the offset indicator, and the subframe bitmap.

The setting related to synchronization may include a CP length used for the side link synchronization signal, a side link synchronization signal ID, a parameter used for transmission, and a parameter used for reception. The parameter used for transmission may be a parameter used for setting transmission power. The parameter used for reception may be a parameter indicating a reception window.

Also, the settings related to side link communication and / or settings related to side link discovery may be transmitted via higher layer signaling and set in a terminal device that supports side link communication and / or side link discovery. The setting related to the side link communication may include a setting similar to the setting included in the SIB corresponding to the side link communication. Settings related to side link discovery may include settings included in the SIB corresponding to side link discovery and settings with similar contents.

When the terminal device is out-of-coverage, side link transmission may be performed using parameters preset in the terminal device. When the terminal device is in-coverage, side link transmission may be performed using parameters set through SIB or higher layer signaling.

To synchronize with the out-of-coverage operation, the terminal device acts as a synchronization source by transmitting a PSBCH including a SBCCH (Sidelink Broadcast Control Channel) and a side link synchronization signal. The SBCCH transmits system information necessary for receiving signals from other side link channels. The SBCCH with a side link synchronization signal is transmitted with a fixed period of 40 ms. SBCCH is a logical channel. “Transmit SBCCH” may be synonymous with “transmit PSBCH including SBCCH”.

There are two preset subframes every 40 ms for out-of-coverage operations. The terminal apparatus receives the side link synchronization signal and the SBCCH in a certain subframe. If the terminal device is a synchronization source, the terminal device transmits a side link synchronization signal and SBCCH in another subframe.

The terminal device receives the side link synchronization signal and SBCCH (PSBCH including SBCCH) in one subframe.

When the terminal device is within the network coverage, the SBCCH content transmitted by the terminal device within the network coverage may be acquired from the parameter signaled by the base station device. When the terminal device is out-of-coverage and another terminal device is selected as the synchronization source, the SBCCH content transmitted by the out-of-coverage terminal device may be acquired from the SBCCH received from the other terminal device. . Otherwise (when the terminal device is out-of-coverage and no other terminal device is selected as the synchronization source), the content of the SBCCH transmitted by the out-of-coverage terminal device is set to a parameter set in advance by the terminal device. Given on the basis.

The terminal device performs side link communication in the subframe defined in the side link control period. The side link control period is a period in which resources arranged in a cell for side link control information (that is, PSCCH including side link control information) and side link data transmission (that is, PSSCH including side link data) are generated. Within the side link control cycle, the terminal device transmits side link control information following the side link data. The side link control information indicates L1-ID and transmission characteristics (for example, MCS, resource allocation within the side link control period, timing adjustment). Note that L1-ID may be DST-ID or G-DST-ID.

In the terminal device, one or more resource settings for the PSSCH may be set by an upper layer. The resource setting for PSSCH may be used for reception of PSSCH or transmission of PSSCH.

Note that the resource settings may be referred to as resource pool settings.

In the terminal device, resource settings for one or more PSCCHs may be set by an upper layer. The resource setting for PSCCH may be used for reception of PSCCH or transmission of PSCCH. Further, the resource configuration for the PSCCH may be related to either the side link transmission mode 1 or the side link transmission mode 2.

For the side link transmission mode 1, the terminal device that detects the SCI format 0 in the PSCCH may decode the PSSCH corresponding to the detected SCI format 0.

For the side link transmission mode 2, the terminal device that detects SCI format 0 on the PSCCH can decode the detected SCI format 0 and the PSSCH corresponding to the resource setting for the related PSSCH set by the higher layer. Good.

For each resource setting for PSCCH related to side link transmission mode 1 and / or side link transmission mode 2, the terminal device configured by the upper layer to detect SCI format 0 in PSCCH is determined by the upper layer. The indicated G-DST-ID may be used to attempt to decode the PSSCH according to the resource settings for the PSCCH.

In the terminal device, resource settings for one or more PSDCHs may be set by an upper layer. The resource setting for PSDCH may be used for receiving PSDCH or transmitting PSDCH. Moreover, transmission of PDSCH corresponding to the resource setting for PSCCH may be related to either side link discovery type 1 or side link discovery type 2B.

For side link discovery type 1 and / or side link discovery type 2B, the upper layer is configured to detect transport blocks in PSDCH for each resource configuration for PSDCH related to reception of PSDCH. The terminal device may decode the PSDCH according to the resource setting for the PSDCH.

Except for SSSS transmission, the side link transmission power does not change within the side link subframe. The transmission power of the side link physical channel and the associated DMRS transmitted in the same subframe is the same. Also, the transmission power of PSSS and PSBCH transmitted in the same subframe is the same.

The terminal device does not expect the resource setting for the PSCCH such that the number of resource blocks in the resource block pool indicated by the resource setting for the PSCCH exceeds 50 in a specific subframe.

The LTE time unit T _s is based on the subcarrier spacing (eg, 15 kHz) and the FFT size (eg, 2048). That is, T _s is 1 / (15000 × 2048) seconds. The time length of one slot is 15360 · T _s (that is, 0.5 ms). 1 time length of the subframe is 30720 · _{T s} (i.e., 1 ms). The time length of one radio frame is 307200 · T _s (that is, 10 ms).

Management of physical channel or physical signal scheduling using radio frames. The time length of one radio frame may be 10 milliseconds (ms). One radio frame may be composed of 10 subframes. Furthermore, one subframe may be composed of two slots. That is, the time length of one subframe may be 1 ms, and the time length of one slot may be 0.5 ms. Further, management may be performed using resource blocks as a minimum scheduling unit in which physical channels are arranged. A resource block is a constant frequency region composed of a set of a plurality of subcarriers (for example, 12 subcarriers) on a frequency axis and a region composed of a constant transmission time interval (TTI, slot, symbol) (time region) ) May be defined. One subframe may be referred to as one resource block pair.

Also, one TTI may be defined as one subframe or the number of symbols constituting one subframe. For example, in the case of NCP (Normal Cyclic Prefix), one TTI may be composed of 14 symbols. Further, in the case of ECP (Extended CP), one TTI may be composed of 12 symbols. Note that TTI may be defined as a reception time interval on the reception side. The TTI may be defined as a transmission unit or a reception unit of a physical channel or a physical signal. That is, the time length of the physical channel or physical signal may be defined based on the length of TTI. The symbol may include an SC-FDMA symbol and / or an OFDM symbol. Also, the length of TTI (TTI length) may be expressed by the number of symbols. Further, the TTI length may be expressed by a time length such as millisecond (ms) or microsecond (μs).

∙ Each symbol is mapped with a sequence related to a physical channel and / or a physical signal. In order to improve the detection accuracy of the sequence, the CP is added to the sequence related to the physical channel and / or the physical signal. CP includes NCP and ECP, and ECP adds a longer sequence length than NCP. The sequence length related to the CP may be referred to as the CP length.

When the terminal device and the base station device support a function related to LR (Latency Reduction), one TTI may be configured with a number less than 14 symbols in NCP (12 symbols in ECP). For example, the TTI length of one TTI may be configured with any number of symbols of 2, 3, and 7. A TTI composed of fewer symbols than 14 symbols in NCP (12 symbols in ECP) may be referred to as sTTI (short TTI, shorter TTI, shortened TTI).

TTI with a TTI length of NCP and 14 symbols (12 symbols with ECP) may be simply referred to as TTI.

As the TTI length of sTTI (DL-sTTI) for downlink transmission, either 2 symbols or 7 symbols may be set. The TTI length of sTTI (UL-sTTI) for uplink transmission may be set to 2 symbols, 3 symbols, 4 symbols, or 7 symbols. SPDCCH and sPDSCH may be arranged in DL-sTTI. Note that the TTI lengths of sPUSCH, sPUCCH, and sPRACH may be set individually. The sPDSCH TTI length may include an sPDCCH symbol or a PDCCH symbol. Also, the TTI length of sPUSCH and / or sPUCCH may include a DMRS symbol or an SRS symbol.

The subcarrier intervals of the various physical channels and / or physical signals described above may be individually defined / set for each physical channel and / or physical signal. Also, the time length of one symbol of various physical channels and / or physical signals may be individually defined / set for each physical channel and / or physical signal. That is, the TTI lengths of various physical channels and / or physical signals may be individually defined / set for each physical channel and / or physical signal.

In this embodiment, CA (Carrier Aggregation) in which communication is performed using a plurality of cells (component carriers corresponding to the cells) may be performed. In CA, there are a primary cell (PCell) as a cell for establishing initial access and RRC connection, and a secondary cell that is added / changed / deleted / activated / deactivated using the primary cell.

In this embodiment, DC (Dual Connectivity) that performs communication using a plurality of cells (component carriers corresponding to the cells) may be performed. In DC, a group is comprised with the cell which belongs to each of two base station apparatuses (MeNB (Master | eNB), SeNB (Secondary | eNB)). The cell group that belongs to the MeNB and includes the primary cell is defined as MCG (Master Cell Group), and the cell group that belongs to the SeNB and includes the primary secondary cell (PSCell) is defined as SCG (Secondary Cell Group). The primary secondary cell is a cell group that does not include the primary cell when a plurality of cell groups are set, that is, a cell having the same function as the primary cell (secondary cell, serving cell other than the primary cell) in the SCG. It is.

The primary cell and the primary secondary cell play the role of a ply cell in each CG. Here, the primary cell may be a cell to which a control channel corresponding to PUCCH and / or PUCCH can be transmitted and / or allocated, and is related to an initial access procedure / RRC connection procedure / initial connection establishment procedure. May be a cell that can trigger a random access procedure in L1 signaling, a cell that monitors a radio link, and semi-persistent scheduling supports May be a cell to be detected, a cell to detect / determine RLF, or a cell that is always activated. In the present embodiment, a cell having functions of a primary cell and / or a primary secondary cell may be referred to as a special cell. For the LR cell, the primary cell / primary secondary cell / secondary cell may be defined similarly to the LTE.

In the present invention, the time domain may be represented by a time length or the number of symbols. Further, the frequency domain may be represented by a bandwidth, the number of subcarriers, the number of resource elements in the frequency direction, and the number of resource blocks.

In the LR cell, the TTI size (TTI length) may be changeable based on the subframe type, higher layer setting information, and control information included in L1 signaling.

In the LR cell, access without grant may be possible. An access that does not require a grant is an access that does not use control information (DCI format, downlink grant, uplink grant) that indicates the schedule of PDSCH or PUSCH (a downlink or uplink shared channel / data channel). That is. That is, in the LR cell, an access method using PDCCH (downlink control channel) that does not perform dynamic resource allocation or transmission instruction may be applied.

In the LR cell, the terminal device performs the same HARQ-ACK and / or CSI feedback corresponding to the downlink resource (signal, channel) based on the function (performance, capability) of the terminal device and the setting from the base station device. You may perform using the uplink resource (a signal, a channel) mapped by the sub-frame. In this subframe, the reference resource related to CSI for the CSI measurement result in a certain subframe may be CRS or CSI-RS of the same subframe. Such a subframe may be referred to as a self-contained subframe.

Note that a self-contained subframe may be composed of one or more consecutive subframes. That is, the self-contained subframe may be composed of a plurality of subframes, or may be one transmission burst composed of a plurality of subframes. The last subframe (the rear subframe including the last) constituting the self-contained subframe is preferably an uplink subframe or a special subframe. That is, it is preferable that an uplink signal / channel is transmitted in the last subframe.

When the self-contained subframe includes a plurality of downlink subframes and one uplink subframe or special subframe, the HARQ-ACK for each of the plurality of downlink subframes is the one uplink subframe. It may be transmitted in UpPTS of a link subframe or special subframe.

The communication device determines ACK or NACK for the signal based on whether or not the signal has been received (demodulated and decoded). ACK indicates that the communication device has received a signal, and NACK indicates that the communication device has not received a signal. The communication apparatus to which NACK is fed back may retransmit a signal that is NACK. The terminal apparatus determines whether to retransmit the PUSCH based on the content of HARQ-ACK for the PUSCH transmitted from the base station apparatus. The base station apparatus determines whether to retransmit the PDSCH based on the content of the HARQ-ACK for the PDSCH or PDCCH / EPDCCH transmitted from the terminal apparatus. The ACK / NACK for the PUSCH transmitted by the terminal device is fed back to the terminal device using PDCCH or PHICH. ACK / NACK for PDSCH or PDCCH / EPDCCH transmitted by the base station apparatus is fed back to the base station apparatus using PUCCH or PUSCH.

In the present embodiment, the subframe indicates a transmission unit and / or a reception unit of the base station device and / or the terminal device. Moreover, in this embodiment, TTI has shown the transmission unit and / or reception unit of the base station apparatus and / or the terminal device.

The base station apparatus determines that the terminal apparatus is an LR (Latency Reduction) device based on LCID (Logical Channel ID) for CCCH (Common Control Channel) and capability information (performance information, function information) of the terminal device. Also good.

The base station apparatus may determine that the terminal apparatus is an NR (Next Generation) device based on the LCID for the CCCH and the capability information of the terminal apparatus.

When the terminal device and / or the base station device supports the capability regarding LR and / or NR, the processing time is based on the length (number of symbols) of the TTI used for the received signal and / or the transmitted signal. (Processing delay, latency) may be determined. That is, the processing time of the terminal device and / or the base station device supporting the LR and / or NR capability may be variable based on the TTI length for the received signal and / or the transmitted signal.

S1 signaling has been expanded to include terminal radio capability information for paging. When this paging-specific capability information is provided to the MME (Mobility Management Entity) by the base station device, the MME uses this information to instruct the base station device that the paging request from the MME relates to the LR terminal. May be. The identifier may be referred to as ID (Identity, Identifier).

The terminal device capability information (UE radio access capability, UE UEEU capability) starts the procedure for the terminal device in the connection mode when the base station device (EUTRAN) needs the terminal device capability information. The base station apparatus inquires about the capability information of the terminal apparatus. In response to the inquiry, the terminal device transmits capability information of the terminal device. The base station apparatus determines whether or not it corresponds to the capability information, and when it corresponds, transmits the setting information corresponding to the capability information to the terminal apparatus using higher layer signaling or the like. When the setting information corresponding to the capability information is set, the terminal device determines that transmission / reception based on the function is possible.

Parameters relating to physical channel and / or physical signal settings may be set in the terminal device via higher layer signaling as higher layer parameters. In addition, parameters related to the configuration of some physical channels and / or physical signals may be set in the terminal device via L1 signaling (physical layer signaling, for example, PDCCH / EPDCCH) such as DCI format and grant. Also, default parameters or default values for parameters related to physical channel and / or physical signal settings may be preset in the terminal device. Further, the terminal device may update the default value when parameters related to the settings are notified using higher layer signaling. Also, depending on the corresponding setting, the type of higher layer signaling / message used to notify the setting may be different. For example, the upper layer signaling / message may include an RRC message, broadcast information, system information, and the like.

When transmitting a DS at the LAA frequency, the base station apparatus may map data information and / or control information in the DS occasion. The data information and / or control information may include information regarding the LAA cell. For example, the data information and / or control information may include the frequency to which the LAA cell belongs, the cell ID, the load and congestion status, the interference / transmission power, the channel exclusive time, and the buffer status regarding transmission data.

When the DS is measured at the LAA frequency, the resources used for each signal included in the DS may be extended. For example, CRS may use not only the antenna port 0 but also resources corresponding to the antenna ports 2 and 3. In addition, for CSI-RS, not only the antenna port 15 but also resources corresponding to the antenna ports 16 and 17 may be used.

In the LR cell, when resources related to DS are set in the terminal device using higher layer signals (RRC signaling) or system information, L1 signaling (control information corresponding to a field having a PDCCH or DCI format) or L2 signaling Using the (control information corresponding to MAC CE), that is, the lower layer signal (the signal below the RRC layer), the terminal device may be dynamically instructed whether or not to receive the DS.

In the LR cell, the RS for demodulation / decoding and the RS for CSI measurement may be a common resource or may be different resources when individually defined.

Next, cell search according to the present embodiment will be described.

In LTE, a cell search is a procedure for performing time-frequency synchronization of a cell in which a terminal device is located and detecting a cell ID of the cell. EUTRA cell search supports a full scalable transmission bandwidth corresponding to 72 subcarriers or more. EUTRA cell search is performed on the downlink based on PSS and SSS. The PSS and SSS are transmitted using 72 subcarriers at the center of the bandwidth of the first subframe and the sixth subframe of each radio frame. The adjacent cell search is performed based on the same downlink signal as the initial cell search.

In the LR, when communication is performed in a stand-alone manner, a cell search similar to the above may be performed.

Next, measurement of the physical layer according to this embodiment will be described.

In LTE, physical layer measurements include intra-frequency and inter-frequency EUTRAN measurements (RSRP / RSRQ), terminal device reception and transmission time differences, and reference signal time differences used for terminal device positioning (RSTD) There are measurements related to between RATs (EUTRAN-GERAN / UTRAN) and measurements between systems (EUTRAN-non-3GPP RAT). The physical layer measurement is performed in order to support mobility. In addition, the EUTRAN measurement includes a measurement performed by an idle mode terminal device and a measurement performed by a connection mode terminal device. The terminal device performs EUTRAN measurement in an appropriate measurement gap and is synchronized with the cell in which the EUTRAN measurement is performed. Since these measurements are performed by the terminal device, they may be referred to as terminal device measurements.

The terminal device may support at least two physical quantities (RSRP, RSRQ) for measurement in EUTRAN. Further, the terminal device may support a physical quantity related to RSSI. The terminal device may perform a corresponding measurement based on a parameter relating to a physical quantity set as an upper layer parameter.

The physical layer measurement is performed to support mobility. For example, intra-frequency and inter-frequency measurement in EUTRAN (RSRP / RSRQ), time difference between reception and transmission of terminal device, measurement of reference signal time difference used for positioning of terminal device (RSTD), and inter-RAT (EUTRAN) -Measurement related to GERAN / UTRAN and measurement related to inter-system (EUTRAN-non-3GPP RAT). For example, physical layer measurements include measurements for intra and inter frequency handovers, measurements for inter RAT handovers, timing measurements, measurements for RRM, and measurements for positioning if positioning is supported. Note that the measurement for inter-RAT handover is defined in support of handover to GSM (registered trademark), UTRA FDD, UTRA TDD, CDMA2000, 1xRTT, CDMA2000 HRPD, IEEE 802.11. EUTRAN measurements are also used to support mobility. In addition, the EUTRAN measurement includes a measurement performed by an idle mode terminal device and a measurement performed by a connection mode terminal device. For example, RSRP and RSRQ may be measured regardless of whether the terminal device is in an idle mode or a connected mode for each of intra and inter frequencies. The terminal device performs EUTRAN measurement in an appropriate measurement gap and is synchronized with the cell in which the EUTRAN measurement is performed.

The measurement of the physical layer includes that the radio characteristics are measured by the terminal device and the base station device and reported to the upper layer of the network.

Next, an example of a procedure for mapping a reference signal related to a certain physical channel to a physical resource according to the present embodiment will be described.

The terminal device generates a sequence for the first reference signal using at least the first parameter. At least the first parameter may be set based on the speed of the terminal device. For example, when the speed of the terminal device does not exceed a first threshold (predetermined threshold), the first parameter may be set to the first value. When the speed of the terminal device exceeds the first threshold, the first parameter may be set to the second value. The terminal apparatus generates a sequence for the second reference signal in the same subframe and / or in the same TTI based on the sequence for the first reference signal. The mapping of the sequence for the second reference signal to the physical resource may be performed based on the sequence for the first reference signal. For example, when the sequence for the first reference signal is generated using the first value, the first mapping may be applied to the mapping of the sequence for the second reference signal to the physical resource. When the sequence for the first reference signal is generated using the second value, the second mapping may be applied to the mapping of the sequence for the second reference signal to the physical resource. The first mapping is a fixed and / or unique and / or specific mapping regardless of the speed of the terminal device, and the second mapping is based on the speed of the terminal device and / or the first mapping. This mapping is variable based on one series.

When the terminal device exceeds the second threshold (for example, first threshold <second threshold), the first parameter may be set to the third value.

Note that the range in which the first parameter can be selected or switched (may be a value set as an option) may be set via upper layer signaling or system information.

When the first reference signal is used for demodulating the side link physical channel, the terminal apparatus determines that the second sequence for the second reference signal is the same based on the first sequence for the first reference signal. It may be determined whether to map to a physical resource within a subframe and / or within the same TTI. For example, when the first sequence is the third sequence, the second sequence may not be mapped to the physical resource within the same subframe and / or within the same TTI. When the first sequence is the fourth sequence, the second sequence may be mapped to the physical resource within the same subframe and / or within the same TTI. The TTI may include sTTI. That is, the TTI may include TTIs having different lengths (number of symbols).

Also, the symbol to which the first sequence is mapped and the symbol to which the second sequence is mapped may be different. Also, the physical resource (resource element, symbol) to which the first sequence is mapped may be different from the physical resource to which the second sequence is mapped. The number of resource elements and / or symbols to which the first sequence is mapped may be different from the number of resource elements and / or symbols to which the second sequence is mapped. The physical resource may be a physical resource in a subframe and / or in a TTI. Further, the physical resource may be a specific resource element of a specific symbol.

In the same subframe based on the first sequence for the first reference signal included in the side link transmission, the terminal device transmits the side link transmission (transmission of the side link physical channel) from the other terminal device, In addition, assuming that the second reference signal in the same TTI is mapped to the second sequence of physical resources, the reception processing of the side link physical channel is performed. For example, if the first sequence for the received first reference signal is the third sequence, the terminal apparatus may respond to the second reference signal transmitted in the same subframe and / or in the same TTI. Assuming that the mapping to the physical resource of the second sequence is the first mapping, reception processing of the side link physical channel is performed. In addition, if the first sequence for the received first reference signal is the fourth sequence, the terminal apparatus may be configured for the second reference signal transmitted in the same subframe and / or in the same TTI. Assuming that the mapping to the physical resource of the second sequence is the second mapping, reception processing of the side link physical channel is performed. Note that the reception processing may include demodulation processing. The reception process may include a decoding process. The reception process may include a process for extracting information (data information (user data), control information (control data)) from the received signal.

Also, the terminal device, for the side link transmission (transmission of the side link physical channel) from the other terminal device, uses the same subframe based on the first sequence for the first reference signal included in the side link transmission It may be assumed whether a second sequence of physical resources is mapped to a second reference signal within and / or within the same TTI.

FIG. 3 is a diagram illustrating an example of mapping of the side link physical channel and / or related DMRS to physical resources based on the speed of the terminal device according to the present embodiment. FIG. 3 (a) is an example of mapping of the side link physical channel and / or the associated DMRS when the speed of the terminal device is the first speed (eg, low speed). FIG. 3B is an example of the mapping of the side link physical channel and / or the associated DMRS when the speed of the terminal device is the second speed (for example, medium speed). FIG.3 (c) is an example of the mapping of the side link physical channel and / or related DMRS when the speed of the terminal device is the third speed (for example, high speed). Based on the speed of the terminal device, resources in the time direction may be increased. When the preamble arranged at the head in the subframe and / or TTI is used for demodulation of the side link physical channel, the DMRS shown in FIG. 3A may not be arranged. That is, the side link physical channel may be arranged in the symbol in which the DMRS shown in FIG. The first mapping described above may be the mapping shown in FIG. The second mapping described above may be the mapping shown in FIG. The first mapping and the second mapping may be mappings other than the mapping of FIG.

The first reference signal may be at least one or all of the following elements A1 to A19.
Element A1: PSSS
Element A2: SSSS
Element A3: DMRS related to PSBCH and / or sPSBCH
Element A4: DMRS associated with PSDCH and / or sPSDCH
Element A5: DMRS related to PSSCH arranged in specific subframe and / or specific symbol
Element A6: DMRS related to PSCCH arranged in specific subframe and / or specific symbol
Element A7: PSS
Element A8: SSS
Element A9: PBCH
Element A10: CRS arranged in a specific subframe and / or a specific symbol
Element A11: URS or DMRS arranged in a specific subframe and / or a specific symbol
Element A12: CSI-RS arranged in a specific subframe and / or a specific symbol
Element A13: PRS arranged in a specific subframe and / or a specific symbol
Element A14: PRACH and / or sPRACH
-Element A15: TTI (sTTI) and / or PRACH and / or sPRACH and / or preamble signal / sequence (PRACH) arranged at the head (first symbol) in a subframe Signal with preamble sequence)
Element A16: SRS
Element A17: TTI (sTTI) or SRS arranged at the head (first symbol) in the subframe
Element A18: DMRS related to PUSCH arranged in specific subframe and / or specific symbol
Element A19: DMRS related to PUCCH arranged in specific subframe and / or specific symbol

Note that the specific subframe may include a specific TTI in the specific subframe.

Note that the specific symbol may include a specific symbol in a specific subframe and / or a specific symbol in a specific TTI.

The first parameter may be at least one or all of the following elements B1 to B15. Note that default values may be preset for the following elements. Some elements may be provided via higher layer signaling or may be provided via DCI format or SCI format.
Element B1: ID uniquely set for the physical channel / physical signal used for sequence generation
Element B2: Cyclic shift Element B3: Type of RNTI Element B4: Value of RNTI corresponding to element B3 Element B5: Type of CP to be added and value corresponding to CP Element B6: Subframe Number / index element B7: Slot number / index element B8: Symbol number / index element B9: TTI (sTTI) number / index or TTI (sTTI) number / index element B10 included in a certain subframe: Antenna port number / element B11: offset value based on sequence shift pattern / element B12: ID set by DCI
Element B13: ID set by SCI
-Element B14: Value calculated / selected based on the speed of the terminal device-Element B15: There is a terminal device when the whole world or a specific area is divided by a specific zone (the terminal device is in-coverage) ID indicating a zone (coverage) for performing measurement and / or communication (zone ID)

Next, an example of sequence generation for the first reference signal and / or the second reference signal will be described.

The sequence for the first reference signal and / or the second reference signal may be defined by a cyclic shift and a reference sequence. The length of the sequence and the reference sequence may be based on the physical channel and / or the number of subcarriers (that is, the number of resource elements in the frequency direction) constituting the bandwidth to which the physical signal is mapped.

That is, the series may be defined based on the above-described element B2.

The series and the reference series may be generated corresponding to the group number (series group number) and the reference series number (reference series number within the group). There may be one case and two cases for the reference series in the group for each series length. The definition of the reference sequence may be based on the sequence length. For example, the definition may be different when the sequence length of the reference sequence is longer than 36 (may include 36) and shorter. When the sequence length of the reference sequence is longer than 36, the reference sequence may be given based on a ZC (Zadoff-Chu) sequence. When the sequence length of the reference sequence is shorter than 36, a predefined sequence may be used. This predefined sequence may be referred to as CGS (ComputerCompGenerated Sequence). For example, when the sequence lengths used for the first reference signal and the second reference signal are different, the first reference signal is CGS, and the second reference signal is a ZC sequence. Good.

A group number of a certain slot (a certain TTI) may be defined based on a group hopping pattern (sequence group hopping pattern) and a sequence shift pattern. For example, there may be 17 types of group hopping patterns and 30 types of sequence shift patterns. The group hopping pattern is a pattern defined for each cell (that is, common to terminal devices in a cell) for a certain slot (a certain TTI). The sequence shift pattern is a pattern defined for each cell regardless of whether group hopping is effective and regardless of the slot (TTI). Group hopping patterns and sequence shift patterns may be used to reduce inter-cell interference.

The group hopping pattern may be different for each physical channel and / or physical signal.

The group hopping pattern may be defined based on a slot number (TTI number), whether to enable group hopping, and / or a pseudo-random sequence. The pseudo-random sequence generator may be initialized based on a predetermined initial value at the beginning of each radio frame. The initial value may be an ID set for a physical channel and / or a physical signal, or may be a physical cell ID.

The group hopping pattern and / or sequence hopping pattern may be used to reduce inter-cell interference between slots.

The hopping pattern and the sequence shift pattern are common among the terminal devices in the cell, but the sequence value for a certain resource element may be defined for each terminal device.

In this embodiment, the pseudo-random sequence may be defined based on the gold sequence and / or the M sequence.

That is, the group hopping pattern may be given based on a part or all of the above-described elements B1, B6 to B9, B15.

A sequence shift pattern may be defined for each physical channel and / or physical signal. For example, the sequence shift pattern for a certain physical channel may be given based on higher layer parameters related to the physical cell ID and the sequence shift pattern. Further, the sequence shift pattern for another physical channel may be given based on an ID set for the physical channel.

That is, the series shift pattern may be given based on a part or all of the above-described elements B1, B11, and B15.

Sequence hopping may be applied to a physical channel and / or physical signal having a predetermined sequence length. For physical channels and / or physical signals that are less than a predetermined sequence length, the reference sequence number in the reference sequence group may be zero. When the length is longer than the predetermined sequence length, the reference sequence number in the reference sequence group in a certain slot (a certain TTI) may be defined based on a pseudo-random sequence for the slot number (TTI number). The sequence hopping pattern is defined when group hopping is disabled and sequence hopping is enabled. In other cases, sequence hopping may not be performed. That is, sequence hopping may be used to hop sequences between slots (or between TTIs) instead of group hopping. The pseudo-random sequence generator for the pseudo-random sequence for sequence hopping may be initialized based on a predetermined initial value at the beginning of the radio frame. The predetermined initial value may be given based on an offset value for ID and / or sequence shift set for the physical channel and / or physical signal.

That is, the sequence hopping pattern may be given based on part or all of the elements B1, B11, and B15 described above.

A group hopping pattern, sequence shift pattern, and / or sequence hopping pattern may further be provided if the terminal device supports the ability to change the physical channel and / or physical signal mapping pattern based on the speed of the terminal device. , Based on element B14.

The initialization of the pseudo-random sequence generator may be performed not only in the radio frame but also at the beginning of a subframe, at the beginning of a slot, at the beginning of a symbol, or may be performed at the TTI. It may be done first.

Note that the initial value used for initialization of the pseudo-random sequence generator may be given based on part or all of the above-described elements B1, B3 to B9, B12, and B13. Further, if the terminal device supports the ability to change the physical channel and / or physical signal mapping pattern based on the speed of the terminal device, the initial value is one of the elements B1, B3-B9, B12, B13. In addition to part or all, it may be given based on the above-described elements B14 and B15.

A sequence for the first reference signal and / or the second reference signal may be given to the antenna port. That is, each series may be given based on the parameter corresponding to the above-described element B10.

Note that the cyclic shift for each antenna port may be given based on a value set via higher layer signaling and the antenna port number. It should be noted that the value regarding the cyclic shift is the amount of phase rotation for at least one of the sequence and / or the resource element to which the sequence is mapped and / or the resource element to which the sequence corresponding to the antenna port is mapped. May be used to set That is, the phase rotation amount based on the cyclic shift may be set individually for each sequence, each resource element, each antenna port, each physical channel and / or physical signal, and each terminal device.

The antenna port (antenna port number) used for transmitting the first reference signal and / or the resource element corresponding to the antenna port may change based on the speed of the terminal device. That is, the terminal device may transmit a physical channel and / or a physical signal using a corresponding antenna port based on the speed of the terminal device. For example, if the speed of the terminal device does not exceed the first threshold, the terminal device may transmit the first reference signal using the first antenna port. If the speed of the terminal device exceeds the first threshold, the terminal device may transmit the first reference signal using the second antenna port. Here, the mapping pattern for the first antenna port and the mapping pattern for the second antenna port may be different. Further, the cyclic shift for the first antenna port may be different from the cyclic shift for the second antenna port.

Also, the antenna port (antenna port number) used for transmitting the first reference signal and / or the resource element corresponding to the antenna port may be added based on the speed of the terminal device. For example, when transmitting using the 1st antenna port with respect to the 1st reference signal, if the speed of a terminal unit exceeds the 1st threshold, a terminal unit will be the 1st antenna port and the 2nd antenna port. May be used to transmit the first reference signal. Depending on the speed of the terminal device, the number of antenna ports to be added (total number) and / or the number of resource elements for the antenna port (total number) may be determined.

The second reference signal may be at least one or all of the following elements C1 to C8.
Element C1: DMRS related to PSSCH and / or sPSSCH excluding physical resources (resource elements) for element A5
Element C2: DMRS related to PSCCH and / or sPSCCH excluding physical resources (resource elements) for element A6
Element C3: URS and / or DMRS related to PDCCH / EPDCCH / sPDCCH
Element C4: URS and / or DMRS related to PDSCH / sPDSCH
Element C5: CRS excluding physical resources (resource elements) for element A10
Element C6: URS and / or DMRS excluding physical resource (resource element) for element A11
Element C7: DMRS related to PUCCH and / or sPUCCH
Element C8: DMRS related to PUSCH and / or sPUSCH

Note that there may be as many predetermined thresholds as the number of thresholds. Also, the predetermined threshold may be addable and / or changed and / or deleted via higher layer signaling. Further, the number of values that can be set for the first parameter may be set corresponding to the number of predetermined thresholds.

Next, an example of a setting procedure related to the resource pool according to this embodiment will be described.

In the terminal device, one or more resource pool lists including settings related to one or more resource pools are set. The terminal device selects a corresponding resource pool list from a plurality of resource pool lists based on the speed of the terminal device. For example, when the speed of the terminal device does not exceed the first threshold (predetermined threshold), the terminal device includes the first resource pool included in the first resource pool list from among the plurality of resource pool lists. May be selected. When the speed of the terminal device exceeds the first threshold, the terminal device may select the second resource pool included in the second resource pool list from the plurality of resource pool lists. .

If the speed of the terminal device exceeds a second threshold value (for example, the first threshold value <the second threshold value), the third resource pool list is included in the third resource pool list from among the plurality of resource pool lists. Select a resource pool.

The number of source pool lists to be selected may be determined based on the number of corresponding thresholds.

The terminal device may transmit the corresponding side link physical channel using the selected resource pool. That is, a resource pool may be set for each side link physical channel.

The mapping of the reference signal (DMRS) in different resource pools included in the same resource pool list may be the same mapping.

A plurality of resource pool lists corresponding to the speed of the terminal device is given based on the terminal device pre-setting when the terminal device is out-of-coverage, and when the terminal device is in-coverage, It may be provided based on SIB related to the received side link or higher layer signaling from the base station apparatus.

Also, the terminal device may select a resource pool corresponding to the speed of the terminal device from one resource pool list based on the speed of the terminal device. For example, when the speed of the terminal device does not exceed the first threshold (predetermined threshold), the terminal device may select the first resource pool from a specific resource pool list. When the speed of the terminal device exceeds the first threshold, the terminal device may select the second resource pool from the specific resource pool list.

If the speed of the terminal device exceeds the second threshold (for example, the first threshold <the second threshold), the third resource pool may be selected from the specific resource pool list.

The reference signal mapping from the first resource pool to the n-th resource pool (n is a predetermined value) includes at least the first parameter and / or the second parameter included in the setting for each resource pool. It may be determined based on the parameters.

Further, the resource pool and / or resource pool list may be included for at least one or all of the following elements D1 to D3.
Element D1: Setting for side link communication (in a pedestrian terminal device) Element D2: Setting for side link discovery (in a pedestrian terminal device) Element D3: V2X communication excluding pedestrian terminal device (That is, for side link communication and / or side link discovery in an in-vehicle terminal device)

Further, the mapping of the side link physical channel and / or related DMRS to the physical resource transmitted in the resource pool is determined based on at least one or all of the following elements E1 to E4: May be.
Element E1: Setting type (release, version) including resource pool and / or resource pool list
Element E2: Type of resource pool list (release, version) that contains settings related to resource pools
Element E3: Setting type (release, version) related to the resource pool
Element E4: Parameter indicating the mapping pattern included in the settings related to the resource pool

In addition, the second parameter may be at least one or all of the following elements F1 to F6.
Element F1: Number of symbols in one subframe and / or TTI used for mapping sidelink physical channel to physical resource. Element F2: Used for mapping DMRS related to sidelink physical channel to physical resource. Number of symbols in one subframe and / or TTI, element F3: Resources in one subframe and / or one symbol in TTI used for mapping to DMRS physical resources related to the side link physical channel Number of elements or arrangement interval of resource elements used for DMRS (value related to comb-shaped frequency arrangement)
Element F4: parameter indicating whether or not the first reference signal is included in the resource pool. Element F5: the second reference signal is included based on the first reference signal. Parameter F6 indicating whether or not the above-mentioned second reference signal is included in the resource pool

The terminal device receives the side link physical channel based on the setting related to the resource pool for reception of a certain side link physical channel. The terminal apparatus may perform reception processing on the received side link physical channel and / or related DMRS based on a mapping pattern corresponding to the setting related to the resource pool. If the setting related to the first reference signal is included in the setting related to the resource pool, the terminal apparatus performs reception processing based on the first sequence for the first reference signal. May be.

If the number of symbols and / or the number of resource elements used for the DMRS associated with the side link physical channel and / or the side link physical channel changes based on the speed of the terminal device, the number of symbols and / or the resource element The TBS (Transport Block Size) and / or the MCS (Modulation Coding Scheme) may be limited corresponding to the number of. In other words, if TBS and / or MCS is limited, the number of symbols and / or the number of resource elements used for the DMRS associated with the sidelink physical channel and / or the sidelink physical channel may be limited. Good.

Note that the physical channel and the physical signal according to the present embodiment may be a physical channel and a physical signal having the same configuration as the physical channel and / or the physical signal, respectively.

The communicable range (communication area) of each frequency controlled by the base station apparatus is regarded as a cell. At this time, the communication area covered by the base station apparatus may have a different width and a different shape for each frequency. Moreover, the area to cover may differ for every frequency. A wireless network in which cells having different types of base station apparatuses and different cell radii are mixed in areas of the same frequency and / or different frequencies to form one communication system is referred to as a heterogeneous network. .

The terminal device is not connected to any network, such as immediately after the power is turned on (for example, at startup). Such a disconnected state is referred to as an idle mode (RRC idle). The terminal device in the idle mode needs to be connected to one of the networks in order to perform communication. That is, the terminal device needs to be in a connection mode (RRC connection). Here, the network may include a base station device, an access point, a network server, a modem, and the like belonging to the network.

A technology in which the terminal device and the base station device aggregate (aggregate) frequencies (component carriers or frequency bands) of a plurality of different frequency bands (frequency bands) according to CA and treat them as one frequency (frequency band). May be applied. The component carrier includes an uplink component carrier corresponding to the uplink (uplink cell) and a downlink component carrier corresponding to the downlink (downlink cell). In each embodiment of the present invention, frequency and frequency band may be used synonymously.

For example, when five component carriers having a frequency bandwidth of 20 MHz are aggregated by CA, a terminal device capable of CA may perform transmission and reception by regarding these as a frequency bandwidth of 100 MHz. Note that the component carriers to be aggregated may be continuous frequencies, or may be frequencies at which all or part of them are discontinuous. For example, when the usable frequency band is 800 MHz band, 2 GHz band, and 3.5 GHz band, one component carrier is transmitted in the 800 MHz band, another component carrier is transmitted in the 2 GHz band, and another component carrier is transmitted in the 3.5 GHz band. It may be. The terminal device and / or the base station device may perform transmission and / or reception at the same time using component carriers (component carriers corresponding to cells) belonging to their operating bands.

Also, it is possible to aggregate a plurality of continuous or discontinuous component carriers in the same frequency band. The frequency bandwidth of each component carrier may be a frequency bandwidth (for example, 5 MHz or 10 MHz) narrower than the receivable frequency bandwidth (for example, 20 MHz) of the terminal device, and the aggregated frequency bandwidth is different. Also good. The terminal device and / or base station device having the NR function may support both a cell having backward compatibility with the LTE cell and a cell having no backward compatibility.

Also, a terminal device and / or a base station device having an LR function may aggregate a plurality of component carriers (carrier types, cells) that are not backward compatible with LTE. Note that the number of uplink component carriers assigned (set or added) by the base station apparatus to the terminal apparatus may be the same as or less than the number of downlink component carriers.

A cell composed of an uplink component carrier in which an uplink control channel is set for requesting a radio resource and a downlink component carrier that is cell-specifically connected to the uplink component carrier is referred to as a PCell. Moreover, the cell comprised from component carriers other than PCell is called SCell. The terminal device performs reception of a paging message, detection of update of broadcast information, initial access procedure, setting of security information, and the like in the PCell, but does not have to be performed in the SCell.

PCell is not subject to activation and deactivation control (that is, it is considered to be always activated), but SCell has a state of activation and deactivation, These state changes are explicitly specified by the base station apparatus, and the state is changed based on a timer set in the terminal apparatus for each component carrier. PCell and SCell are collectively referred to as a serving cell.

When the terminal device and / or base station device supporting both the LTE cell and the LR cell perform communication using both the LTE cell and the LR cell, the terminal device and the base station device configure a cell group related to the LTE cell and a cell group related to the LR cell. May be. That is, a cell corresponding to the PCell may be included in each of the cell group related to the LTE cell and the cell group related to the LR cell.

When a terminal device and / or a base station device supporting both the LTE cell and the NR cell perform communication using both the LTE cell and the NR cell, the terminal device and the base station device configure a cell group related to the LTE cell and a cell group related to the NR cell. May be. That is, a cell corresponding to the PCell may be included in each of the cell group related to the LTE cell and the cell group related to the NR cell.

Note that CA is communication by a plurality of cells using a plurality of component carriers (frequency bands), and is also referred to as cell aggregation. The terminal device may be wirelessly connected (RRC connection) to the base station device via a relay station device (or repeater) for each frequency. That is, the base station apparatus of this embodiment may be replaced with a relay station apparatus.

The base station apparatus manages a cell, which is an area in which the terminal apparatus can communicate with the base station apparatus, for each frequency. One base station apparatus may manage a plurality of cells. The cells are classified into a plurality of types according to the size (cell size) of the area communicable with the terminal device. For example, the cell is classified into a macro cell and a small cell. Further, small cells are classified into femtocells, picocells, and nanocells according to the size of the area. In addition, when the terminal device can communicate with a certain base station device, the cell set to be used for communication with the terminal device among the cells of the base station device is a serving cell, and for other communication Cells that are not used are called peripheral cells.

In other words, in CA, a plurality of configured serving cells include one PCell and one or a plurality of SCells.

PCell is a serving cell in which an initial connection establishment procedure (RRC connection procedure procedure) has been performed, a serving cell that has started a connection re-establishment procedure (RRC connection reestablishment procedure), or a cell designated as PCell in a handover procedure. PCell operates at the primary frequency. The SCell may be set when the connection is (re-) established or afterwards. The SCell operates at a secondary frequency. The connection may be referred to as an RRC connection. A terminal device supporting CA may be aggregated by one PCell and one or more SCells.

If more than one serving cell is configured or a secondary cell group is configured, the terminal apparatus may code transport block codes for at least a predetermined number of transport blocks for each serving cell. In response to block decoding failure, the received soft channel bits corresponding to at least a predetermined range are retained.

The LAA terminal may support a function corresponding to two or more radio access technologies (RAT).

LAA terminal supports two or more operating bands. That is, the LAA terminal supports functions related to CA.

The LAA terminal may support TDD (Time Division Duplex) and HD-FDD (Half Duplex Frequency Division Division). Also, the LAA terminal may support FD-FDD (Full Duplex FDD). The LAA terminal may indicate which duplex mode / frame structure type is supported via higher layer signaling such as capability information.

Further, the LAA terminal may be an LTE terminal of category X1 (X1 is a predetermined value). In other words, the maximum number of bits of the transport block that can be transmitted / received by one TTI may be expanded in the LAA terminal.

Further, the LR terminal may be an LTE terminal of category X2 (X2 is a predetermined value). That is, the maximum number of bits of the transport block that can be transmitted / received in one TTI may be extended or reduced in the LR terminal.

Further, the NR terminal may be an LTE terminal of category X3 (X3 is a predetermined value). That is, the maximum number of bits of a transport block that can be transmitted / received in one TTI may be extended or reduced in the NR terminal.

In each embodiment of the present invention, the TTI and the subframe may be individually defined.

Also, the LAA terminal may support multiple duplex mode / frame structure types.

Frame structure type 1 can be applied to both FD-FDD and HD-FDD. In FDD, 10 subframes can be used for each of downlink transmission and uplink transmission at intervals of 10 ms. Also, uplink transmission and downlink transmission are divided in the frequency domain. In the HD-FDD operation, the terminal device cannot transmit and receive at the same time, but there is no restriction in the FD-FDD operation.

Re-tuning time (time required for tuning (number of subframes or number of symbols)) when frequency hopping or usage frequency is changed may be set by higher layer signaling.

For example, in the LAA terminal, the number of supported downlink transmission modes (PDSCH transmission modes) may be reduced. That is, the base station apparatus, based on the capability information when the number of downlink transmission modes or the downlink transmission mode supported by the LAA terminal is indicated as capability information from the LAA terminal, Sets the downlink transmission mode. Note that, when a parameter for a downlink transmission mode that is not supported by the LAA terminal is set, the LAA terminal may ignore the setting. That is, the LAA terminal does not have to perform processing for the downlink transmission mode that is not supported. Here, the downlink transmission mode is used to indicate a PDSCH transmission scheme corresponding to PDCCH / EPDCCH based on the set downlink transmission mode, RNTI type, DCI format, and search space. Based on these pieces of information, the terminal device can know whether PDSCH is transmitted at antenna port 0, transmitted at transmission diversity, or transmitted at a plurality of antenna ports. The terminal device can appropriately perform reception processing based on the information. Even if DCI related to PDSCH resource allocation is detected from the same type of DCI format, if the downlink transmission mode or RNTI type is different, the PDSCH is not always transmitted in the same transmission scheme.

When the terminal device supports a function related to simultaneous transmission of PUCCH and PUSCH, and supports a function related to repeated transmission of PUSCH and / or PUCCH, the timing at which PUSCH transmission occurs Alternatively, PUCCH and PUSCH may be repeatedly transmitted a predetermined number of times at the timing when PUCCH transmission occurs. That is, PUCCH and PUSCH may be transmitted simultaneously at the same timing (that is, the same subframe).

In such a case, the PUCCH may include a CSI report, HARQ-ACK, and SR.

In PCell, all signals can be transmitted / received, but in SCell, there may be signals that cannot be transmitted / received. For example, PUCCH is transmitted only by PCell. Moreover, PRACH is transmitted only by PCell unless a plurality of TAGs (TimingTiAdvance Group) are set between cells. Moreover, PBCH is transmitted only by PCell. Moreover, MIB is transmitted only by PCell. However, when the terminal device supports the function of transmitting PUCCH or MIB by SCell, the base station device transmits PUCCH or MIB to the terminal device by SCell (frequency corresponding to SCell). You may instruct it to do. That is, when the terminal device supports the function, the base station device may set a parameter for transmitting PUCCH or MIB by SCell to the terminal device.

In PCell, RLF (Radio Link Failure) is detected. The SCell does not recognize that RLF is detected even if the condition for detecting RLF is satisfied. When the RLF condition is satisfied in the lower layer of the PCell, the lower layer of the PCell notifies the upper layer of the PCell that the RLF condition is satisfied. In the PCell, SPS (Semi-Persistent Scheduling) or DRX (Discontinuous Transmission) may be performed. In SCell, you may perform DRX same as PCell. In the SCell, information / parameters related to MAC settings are basically shared with PCells in the same cell group. Some parameters (for example, sTAG-Id) may be set for each SCell. Some timers and counters may be applied only to the PCell. Only applicable timers and counters may be set for the SCell.

FIG. 4 is a schematic diagram illustrating an example of a block configuration of the base station apparatus 2 according to the present embodiment. The base station apparatus 2 includes an upper layer (upper layer control information notification unit) 501, a control unit (base station control unit) 502, a codeword generation unit 503, a downlink subframe generation unit 504, and an OFDM signal transmission unit (downlink transmission). Unit) 506, transmission antenna (base station transmission antenna) 507, reception antenna (base station reception antenna) 508, SC-FDMA signal reception unit (channel state measurement unit and / or CSI reception unit) 509, uplink subframe processing unit 510. The downlink subframe generation unit 504 includes a downlink reference signal generation unit 505. Further, the uplink subframe processing unit 510 includes an uplink control information extraction unit (CSI acquisition unit / HARQ-ACK acquisition unit / SR acquisition unit) 511. The SC-FDMA signal receiving unit 509 also serves as a measurement unit for received signals, CCA, and interference noise power. Note that the SC-FDMA signal receiving unit may be an OFDM signal receiving unit or may include an OFDM signal receiving unit when the terminal apparatus supports transmission of OFDM signals. Note that the downlink subframe generation unit 504 may be a downlink TTI generation unit or may include a downlink TTI generation unit. The downlink TTI generation unit may be a physical channel and / or physical signal generation unit constituting the downlink TTI. That is, the downlink subframe generation unit 504 including a downlink TTI generation unit may include a unit that generates a sequence for a physical channel and / or physical signal to be transmitted. Further, the downlink subframe generation unit 504 including the downlink TTI generation unit may include a unit that maps the generated sequence to a physical resource. The same applies to the uplink. Although not shown, the base station apparatus may include a transmission unit that transmits a TA command. The base station apparatus may include a receiving unit that receives a measurement result related to a time difference between reception and transmission reported from the terminal apparatus. In addition, when the base station apparatus supports the side link, the side link transmission unit for generating and transmitting the side link subframe and / or the side link TTI (that is, the side link signal) is transmitted. And a side link receiving unit that receives the side link signal and performs demodulation and decoding.

FIG. 5 is a schematic diagram illustrating an example of a block configuration of the terminal device 1 according to the present embodiment. The terminal device 1 includes a reception antenna (terminal reception antenna) 601, an OFDM signal reception unit (downlink reception unit) 602, a downlink subframe processing unit 603, a transport block extraction unit (data extraction unit) 605, a control unit (terminal) Control unit) 606, upper layer (upper layer control information acquisition unit) 607, channel state measurement unit (CSI generation unit) 608, uplink subframe generation unit 609, SC-FDMA signal transmission unit (UCI transmission unit) 611 and 612 And transmission antennas (terminal transmission antennas) 613 and 614. The downlink subframe processing unit 603 includes a downlink reference signal extraction unit 604. Note that the downlink subframe processing unit 603 may be a downlink TTI processing unit. Also, the uplink subframe generation unit 609 includes an uplink control information generation unit (UCI generation unit) 610. Note that the OFDM signal receiving unit 602 also serves as a reception signal, CCA, and interference noise power measurement unit. That is, RRM measurement may be performed in the OFDM signal receiving unit 602. When the terminal apparatus supports transmission of OFDM signals, the SC-FDMA signal transmission unit may be an OFDM signal transmission unit or may include an OFDM signal transmission unit. Note that the uplink subframe generation unit 609 may be an uplink TTI generation unit or may include an uplink TTI generation unit. The uplink TTI generator may be a physical channel and / or physical signal generator that constitutes the uplink TTI. That is, the uplink subframe generation unit 609 including the uplink TTI generation unit may include a unit that generates a sequence for a physical channel and / or physical signal to be transmitted. Further, the uplink subframe generation unit 609 including the uplink TTI generation unit may include a unit that maps the generated sequence to a physical resource. Further, the terminal device may include a power control unit for controlling / setting the transmission power of the uplink signal. Although not shown, the terminal device may include a measurement unit for measuring a time difference between reception and transmission of the terminal device. The terminal device may include a transmission unit that reports the measurement result of the time difference.

Further, when the terminal device supports the capability for side link communication and / or side link discovery, the downlink subframe processing unit 603 includes the side link subframe processing unit and / or the side link. A TTI processing unit may be included. Further, the downlink subframe processing unit 603 may have a capability of processing a sidelink subframe and / or a sidelink TTI. That is, the ability to receive the side link TTI may be provided.

Further, when the terminal device supports the capability regarding side link communication and / or side link discovery, the uplink subframe generation unit 609 includes the sidelink subframe generation unit and / or the sidelink. A TTI generator may be included. Further, the uplink subframe generation unit 609 may have a capability of generating a sidelink subframe and / or a sidelink TTI. Here, the ability to generate the side link subframe and / or the side link TTI may include the ability to generate a sequence for the side link physical channel and / or the side link physical signal, or the generated sequence. May include the ability to map to physical resources.

4 and 5, each upper layer may include a MAC (Medium Access Control) layer, an RLC (Radio Link Control) layer, a PDCP (Packet Data Convergence Protocol) layer, and an RRC (Radio Resource Control) layer.

The RLC layer includes AM (Acknowledged Mode) data including an indication indicating that transmission of TM (Transparent Mode) data, UM (Unacknowledged Mode) data, and upper layer PDU (Packet Data Unit) has been successfully transmitted to the upper layer. Perform transmission. Further, the transmission opportunity is notified to the lower layer together with the data transmission and the total size of the RLC PDU transmitted at the transmission opportunity.

The RLC layer is a function related to the transmission of higher layer PDUs (only for AM data transmission), a function related to error correction via ARQ (Automatic Repeat reQuest), and (only for UM and AM data transmission) RLC SDU (Service Data Unit) function for combining / dividing / reconstructing (for AM data transmission) function for RLC data PDU re-segmentation (for AM data transmission only) function for reordering RLC data PDUs (UM) Functions for duplicate detection only (for UM and AM data transmission), functions for discarding RLC SDU (only for UM and AM data transmission), functions for re-establishing RLC, protocol error (only for AM data transmission) Supports detection-related functions.

First, the flow of downlink data transmission / reception will be described using FIG. 4 and FIG. In the base station apparatus 2, the control unit 502 includes MCS (Modulation & Coding Scheme) indicating the modulation scheme and coding rate in the downlink, downlink resource allocation indicating RB used for data transmission, and information used for HARQ control ( The redundancy version, HARQ process number, and NDI (New Data Indicator) are held, and the codeword generation unit 503 and the downlink subframe generation unit 504 are controlled based on these. Downlink data (also referred to as a downlink transport block, DL-SCH data, or DL-SCH transport block) sent from the higher layer 501 is controlled by the control unit 502 in the codeword generation unit 503. Processing such as error correction coding and rate matching processing is performed to generate a code word. A maximum of two codewords are transmitted simultaneously in one subframe in one cell. The downlink subframe generation unit 504 generates a downlink subframe according to an instruction from the control unit 502. First, the codeword generated in the codeword generation unit 503 is converted into a modulation symbol sequence by a modulation process such as PSK (Phase Shift Keying) modulation or QAM (Quadrature Amplitude Modulation) modulation. Also, the modulation symbol sequence is mapped to REs in some RBs, and a downlink subframe for each antenna port is generated by precoding processing. At this time, the transmission data sequence transmitted from the upper layer 501 includes upper layer control information which is control information (for example, dedicated (individual) RRC (Radio Resource Control) signaling) in the upper layer. Also, the downlink reference signal generation section 505 generates a downlink reference signal. The downlink subframe generation unit 504 maps the downlink reference signal to the RE in the downlink subframe according to an instruction from the control unit 502. The downlink subframe generated by the downlink subframe generation unit 504 is modulated into an OFDM signal by the OFDM signal transmission unit 506 and transmitted via the transmission antenna 507. Here, a configuration having one OFDM signal transmission unit 506 and one transmission antenna 507 is illustrated here, but when transmitting a downlink subframe using a plurality of antenna ports, transmission is performed with the OFDM signal transmission unit 506. A configuration including a plurality of antennas 507 may be employed. Further, the downlink subframe generation unit 504 generates a physical layer downlink control channel such as a control channel / shared channel corresponding to PDCCH, EPDCCH, PDCCH, or EPDCCH, and maps it to an RE in the downlink subframe. Can also have. Each of the plurality of base station apparatuses transmits an individual downlink subframe.

In the terminal device 1, the OFDM signal is received by the OFDM signal receiving unit 602 via the receiving antenna 601 and subjected to OFDM demodulation processing.

The downlink subframe processing unit 603 first detects a physical layer downlink control channel such as a control channel corresponding to PDCCH, EPDCCH, PDCCH, or EPDCCH. More specifically, the downlink subframe processing unit 603 transmits a control channel corresponding to PDCCH, EPDCCH, PDCCH, or EPDCCH in an area to which a control channel / shared channel corresponding to PDCCH, EPDCCH, PDCCH, or EPDCCH is allocated. And CRC (Cyclic Redundancy Check) bits added in advance are checked (blind decoding). That is, the downlink subframe processing unit 603 monitors a control channel / shared channel corresponding to PDCCH, EPDCCH, PDCCH, or EPDCCH. One CRC bit is assigned to one terminal such as an ID (C-RNTI (Cell-Radio Network Temporary Identifier), SPS-C-RNTI (Semi-Persistent Scheduling-C-RNTI)) assigned in advance by the base station apparatus. The downlink subframe processing unit 603 recognizes that the control channel / shared channel corresponding to the PDCCH, EPDCCH, PDCCH, or EPDCCH has been detected when the received UE-specific identifier (UEID) or Temporary C-RNTI) matches. Then, a data channel / shared channel corresponding to PDSCH or PDSCH is taken out using control information included in the detected control channel corresponding to PDCCH, EPDCCH, PDCCH, or EPDCCH.

The control unit 606 holds MCS indicating the modulation scheme and coding rate in the downlink based on the control information, downlink resource allocation indicating the RB used for downlink data transmission, and information used for HARQ control, based on these And controls the downlink subframe processing unit 603, the transport block extraction unit 605, and the like. More specifically, the control unit 606 performs control so as to perform RE demapping processing and demodulation processing corresponding to the RE mapping processing and modulation processing in the downlink subframe generation unit 504. The PDSCH extracted from the received downlink subframe is sent to the transport block extraction unit 605. Also, the downlink reference signal extraction unit 604 in the downlink subframe processing unit 603 extracts DLRS from the downlink subframe.

The transport block extraction unit 605 performs rate matching processing in the codeword generation unit 503, rate matching processing corresponding to error correction coding, error correction decoding, and the like, extracts transport blocks, and sends them to the upper layer 607. It is done. The transport block includes upper layer control information, and the upper layer 607 informs the control unit 606 of necessary physical layer parameters based on the upper layer control information. Note that the plurality of base station apparatuses 2 transmit individual downlink subframes, and the terminal apparatus 1 receives these, so that the above processing is performed on the downlink subframes for each of the plurality of base station apparatuses 2. On the other hand, each may be performed. At this time, the terminal device 1 may or may not recognize that a plurality of downlink subframes are transmitted from the plurality of base station devices 2. When not recognizing, the terminal device 1 may simply recognize that a plurality of downlink subframes are transmitted in a plurality of cells. Further, the transport block extraction unit 605 determines whether or not the transport block has been correctly detected, and the determination result is sent to the control unit 606.

Here, the transport block extraction unit 605 may include a buffer unit (soft buffer unit). In the buffer unit, the extracted transport block information can be temporarily stored. For example, when the transport block extraction unit 605 receives the same transport block (retransmitted transport block), if the decoding of the data for this transport block is not successful, the transport block extraction unit 605 temporarily stores it in the buffer unit. The stored data for the transport block and the newly received data are combined (synthesized), and an attempt is made to decode the combined data. The buffer unit flushes the data when the temporarily stored data is no longer needed or when a predetermined condition is satisfied. The condition of data to be flushed differs depending on the type of transport block corresponding to the data. A buffer unit may be prepared for each type of data. For example, a message 3 buffer or a HARQ buffer may be prepared as the buffer unit, or may be prepared for each layer such as L1 / L2 / L3. Note that flushing information / data includes flushing a buffer storing information and data.

Next, the flow of uplink signal transmission / reception will be described. In the terminal apparatus 1, the downlink reference signal extracted by the downlink reference signal extraction unit 604 is sent to the channel state measurement unit 608 under the instruction of the control unit 606, and the channel state measurement unit 608 performs channel state and / or interference. And CSI is calculated based on the measured channel conditions and / or interference. Further, the control unit 606 sends the HARQ-ACK (DTX (untransmitted), ACK (successful detection), or NACK () to the uplink control information generation unit 610 based on the determination result of whether or not the transport block has been correctly detected. Detection failure)) and mapping to downlink subframes. The terminal device 1 performs these processes on the downlink subframes for each of a plurality of cells. Uplink control information generation section 610 generates a PUCCH including the calculated CSI and / or HARQ-ACK or a control channel / shared channel corresponding to PUCCH. In the uplink subframe generation unit 609, a data channel / shared channel corresponding to PUSCH or PUSCH including uplink data sent from the higher layer 607 and a PUCCH or control channel generated in the uplink control information generation unit 610 are provided. An uplink subframe is generated by mapping to the RB in the uplink subframe.

The SC-FDMA signal is received by the SC-FDMA signal receiving unit 509 via the receiving antenna 508, and SC-FDMA demodulation processing is performed. Uplink subframe processing section 510 extracts an RB to which PUCCH is mapped in accordance with an instruction from control section 502, and uplink control information extraction section 511 extracts CSI included in PUCCH. The extracted CSI is sent to the control unit 502. CSI is used for control of downlink transmission parameters (MCS, downlink resource allocation, HARQ, etc.) by the control unit 502. The SC-FDMA signal receiving unit may be an OFDM signal receiving unit. Further, the SC-FDMA signal receiving unit may include an OFDM signal receiving unit.

From the power headroom report, the base station apparatus assumes the maximum output power P _CMAX set by the terminal apparatus, and assumes an upper limit value of power for each physical uplink channel based on the physical uplink channel received from the terminal apparatus. To do. Based on these assumptions, the base station apparatus determines the value of the transmission power control command for the physical uplink channel, and transmits it to the terminal apparatus using the PDCCH with the downlink control information format. By doing so, power adjustment of the transmission power of the physical uplink channel / signal (or uplink physical channel / physical signal) transmitted from the terminal device is performed.

When a base station apparatus transmits PDCCH (EPDCCH) / PDSCH (or a shared channel / control channel of an LR cell corresponding to these) to a terminal apparatus, the base station apparatus allocates the resource to PBCH (or a broadcast channel corresponding to PBCH). PDCCH / PDSCH resource allocation is performed so as not to occur.

PDSCH may be used to transmit messages / information related to SIB / RAR / paging / unicast for terminal devices.

The frequency hopping for PUSCH may be individually set according to the type of grant. For example, the parameter values used for PUSCH frequency hopping corresponding to each of the dynamic schedule grant, semi-persistent grant, and RAR grant may be set individually. Those parameters may not be indicated in the uplink grant. These parameters may also be set via higher layer signaling including system information.

The various parameters described above may be set for each physical channel. Moreover, the various parameters described above may be set for each terminal device. Further, the parameters described above may be set in common between terminal devices. Here, the various parameters described above may be set using system information. The various parameters described above may be set using higher layer signaling (RRC signaling, MAC CE). The various parameters described above may be set using PDCCH / EPDCCH. The various parameters described above may be set as broadcast information. The various parameters described above may be set as unicast information.

In the above-described embodiment, the power value required for each PUSCH transmission includes parameters set by higher layers, adjustment values determined by the number of PRBs assigned to the PUSCH transmission by resource assignment, downlink path loss, and In the above description, the calculation is based on a coefficient to be multiplied, an adjustment value determined by a parameter indicating an MCS offset applied to UCI, a correction value obtained by a TPC command, and the like. The power value required for each PUCCH transmission is used for parameters set by higher layers, downlink path loss, adjustment values determined by UCI transmitted on the PUCCH, adjustment values determined by PUCCH format, and transmission of the PUCCH. In the above description, it is calculated based on an adjustment value determined by the number of antenna ports to be obtained, a value based on a TPC command, and the like. However, the present invention is not limited to this. An upper limit is set for the required power value, and the minimum value between the value based on the above parameter and the upper limit value (for example, P _{CMAX, c} which is the maximum output power value in the serving cell _c ) is set to the required power. It can also be used as a value.

The program that operates in the base station apparatus and the terminal apparatus according to the present invention is a program (a program that causes a computer to function) that controls a CPU (Central Processing Unit) so as to realize the functions of the above-described embodiments according to the present invention. There may be. Information handled by these devices is temporarily stored in RAM (Random Access Memory) during processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) and HDD (Hard Disk Drive). Reading, correction, and writing are performed by the CPU as necessary.

In addition, you may make it implement | achieve a part of terminal device and / or base station apparatus in embodiment mentioned above with a computer. In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.

The “computer system” is a computer system built in a terminal device or a base station device, and includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” may include a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in the computer system.

Further, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory inside a computer system that serves as a server or a client may also include a program that holds a program for a certain period of time. The “computer-readable recording medium” may be an external memory. Further, the program may be for realizing a part of the above-described functions, and may be capable of realizing the above-described functions in combination with a program already recorded in the computer system. .

Further, the base station apparatus in the above-described embodiment can be realized as an aggregate (apparatus group) composed of a plurality of apparatuses. Each of the devices constituting the device group may include some or all of the functions or functional blocks of the base station device according to the above-described embodiment. As a device group, it is only necessary to have each function or each functional block of the base station device. Further, the terminal apparatus according to the above-described embodiment can communicate with the base station apparatus as an aggregate.

Further, the base station apparatus in the above-described embodiment may be EUTRAN (Evolved Universal Terrestrial Radio Access Network). Moreover, the base station apparatus 2 in the above-described embodiment may have a part or all of the functions of the upper node for the eNodeB.

Further, part or all of the terminal device and the base station device in the above-described embodiment may be realized as an LSI that is typically an integrated circuit, or may be realized as a chip set. Each functional block of the terminal device and the base station device may be individually chipped, or a part or all of them may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

In the above-described embodiment, a cellular mobile station device (a mobile phone or a mobile terminal) is described as an example of a terminal device or a communication device. However, the present invention is not limited to this and is installed indoors and outdoors. On-board installation of stationary or non-movable electronic devices such as AV equipment, kitchen equipment (for example, refrigerators and microwave ovens), cleaning / washing equipment, air conditioning equipment, office equipment, vending machines, car navigation systems, etc. The present invention can also be applied to a terminal device or a communication device such as a machine or other daily equipment.

From the above, the present invention has the following features.

(1) A terminal apparatus according to an aspect of the present invention generates a first sequence for a first reference signal based on a first parameter, and generates a second sequence for a second reference signal. And a mapping unit that maps the sequence to a physical resource, and the sequence generation unit sets the first parameter to the first parameter when the speed of the terminal device does not exceed the first threshold value. And when the speed of the terminal device exceeds the first threshold, the first parameter is set to a second value, and the mapping unit is a sequence for the first reference signal. Based on the above, mapping to the physical resource of the second sequence is performed.

(2) A terminal device according to an aspect of the present invention is the terminal device described above, wherein the sequence generation unit generates the second sequence based on a sequence for the first reference signal.

(3) A terminal device according to an aspect of the present invention is the above-described terminal device, wherein the sequence generation unit determines whether to generate the second sequence based on a sequence for the first reference signal. decide.

(4) The method according to an aspect of the present invention is the terminal device described above, and does not generate the second sequence when the speed of the terminal device does not exceed the first threshold, When the speed of the terminal device exceeds the first threshold, the second sequence is generated.

(5) A terminal device according to an aspect of the present invention is the terminal device described above, wherein the mapping unit is configured such that the first sequence with respect to the first reference signal is a third sequence. When the first mapping is applied to the mapping of two sequences to physical resources, and the first sequence for the first reference signal is a fourth sequence, the physical resources of the second sequence A second mapping is applied to the mapping.

(6) The terminal device according to an aspect of the present invention is the terminal device described above, wherein the sequence generation unit is configured such that the speed of the terminal device exceeds a second threshold value that is higher than the first threshold value. Sets the first parameter to a third value, and when the sequence for the first reference signal is a fifth sequence, the mapping unit maps the second sequence to a physical resource. A third mapping is applied to.

(7) A terminal device according to an aspect of the present invention is the terminal device described above, wherein the first threshold value, the first value, the second value, the first mapping, and / or the The second mapping is indicated by information (parameters) included in the system information block.

(8) A terminal device according to an aspect of the present invention is the terminal device described above, wherein the first threshold value, the first value, the second value, and the first mapping are included in the system information block. And / or if the second mapping parameter is not included, the first threshold, the first value, the second value, the first mapping, and / or the second Mapping is performed using values set in the terminal device or external memory, and the system information block includes the first threshold, the first value, the second value, the first mapping, and / or Or if the parameter for the second mapping is included, the first threshold, the first value, the second value, the first mapping, and / or Serial second mapping is given by the parameter.

(9) A terminal device according to an aspect of the present invention is the above-described terminal device, wherein the first reference signal is arranged at a head in TTI (Transmission Time Interval) in the time domain.

(10) A terminal device according to an aspect of the present invention is the above-described terminal device, wherein the first reference signal is PSSS (Primary Sidelink Synchronization Signal) and SSSS (Secondary Sidelink Synchronization Signal). The reference signal is DMRS (Demodulation Reference Signal).

(11) A terminal device according to an aspect of the present invention is the terminal device described above, wherein the first reference signal is a DMRS (Demodulation Reference Signal) related to PSBCH, and the second reference signal is DMRS associated with PSCCH and / or PSSCH.

(12) A terminal device according to an aspect of the present invention is the terminal device described above, wherein the first reference signal is a PRACH (Physical Random Access Channel), and the second reference signal is a DMRS (Demodulation). Reference Signal).

(13) A method according to an aspect of the present invention includes generating a first sequence for a first reference signal based on a first parameter and generating a second sequence for a second reference signal. Mapping the sequence to a physical resource; setting the first parameter to a first value if the speed of the terminal device does not exceed a first threshold; and If the speed exceeds the first threshold, the physical resource of the second sequence based on the step of setting the first parameter to a second value and the sequence for the first reference signal Mapping to.

(14) The terminal device according to one aspect of the present invention includes a first side link physical channel and the first side link physical channel based on the first resource pool list and the second resource pool list. A transmission unit that transmits a DMRS (Demodulation Reference Signal) related to a resource setting unit that selects the first resource pool list or the second resource pool list based on the speed of the terminal device, The resource setting unit selects a first resource pool from the first resource pool list when the speed of the terminal device does not exceed a first threshold, and the speed of the terminal device If the threshold value of 1 is exceeded, a second resource pool is selected from the second resource pool list, and the TT of the first resource pool is selected. The mapping of the first side link physical channel in I (Transmission Time Interval) and / or the mapping of the DMRS is the mapping of the first side link physical channel in the TTI of the second resource pool and / or Different from the DMRS mapping.

(15) A terminal device according to an aspect of the present invention is the terminal device described above, and when the terminal device is out-of-coverage, the first resource pool list and the second resource pool list are , Based on the presetting of the terminal device.

(16) A terminal device according to an aspect of the present invention is the above terminal device, and when the terminal device is in-coverage, the first resource pool list and the second resource pool list are: It is given based on the received SIB (System Information Block).

(17) A terminal device according to an aspect of the present invention is the terminal device described above, wherein the first side link physical channel and the third resource pool list are based on a third resource pool list and a fourth resource pool list, and A receiving unit that receives the DMRS, and when the terminal device is out-of-coverage, the receiving unit includes the third resource pool list included in the presetting of the terminal device, and Receiving the first side link physical channel and the DMRS based on the fourth resource pool list, and a first side link physical channel and associated in a third resource pool included in the third resource pool list DMRS mapping to be performed and a fourth resource pool included in the fourth resource pool list. That mapping of the first side link physical channels and associated DMRS is different.

(18) A terminal device according to an aspect of the present invention is the terminal device described above, and when the terminal device is in-coverage, based on a parameter included in a received SIB (System Information Block), A mapping of the first side link physical channel and associated DMRS in the third resource pool and a mapping of the first side link physical channel and associated DMRS in the third resource pool are determined.

(19) A method according to an aspect of the present invention provides a first side link physical channel and a first side link physical channel based on a first resource pool list and a second resource pool list. Transmitting a related DMRS (Demodulation Reference Signal), selecting the first resource pool list or the second resource pool list based on the speed of the terminal apparatus, and the speed of the terminal apparatus However, if it does not exceed the first threshold, the step of selecting the first resource pool from the first resource pool list, and the speed of the terminal device exceeds the first threshold, Selecting a second resource pool from the second resource pool list, and including a TTI (Tra) of the first resource pool The mapping of the first side link physical channel and / or the mapping of the DMRS in nsmission Time Interval) is the mapping of the first side link physical channel and / or the DMRS in the TTI of the second resource pool. Different from the mapping.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like without departing from the gist of the present invention. The present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the technical scope of the present invention. It is. Moreover, it is the element described in each said embodiment, and the structure which substituted the element which has the same effect is also contained.

The present invention can be used in, for example, a communication system, a communication device (for example, a mobile phone device, a base station device, a wireless LAN device, or a sensor device), an integrated circuit (for example, a communication chip), or a program. .

501 Upper layer 502 Control unit 503 Codeword generation unit 504 Downlink subframe generation unit 505 Downlink reference signal generation unit 506 OFDM signal transmission unit 507 Transmission antenna 508 Reception antenna 509 SC-FDMA signal reception unit 510 Uplink subframe processing unit 511 Uplink control information extraction unit 601 Reception antenna 602 OFDM signal reception unit 603 Downlink subframe processing unit 604 Downlink reference signal extraction unit 605 Transport block extraction unit 606 Control unit 607 Upper layer 608 Channel state measurement unit 609 Uplink sub Frame generation unit 610 Uplink control information generation units 611 and 612 SC-FDMA signal transmission units 613 and 614 Transmission antenna

Claims (6)

1. Transmission for transmitting a first side link physical channel and a DMRS (Demodulation Reference Signal) related to the first side link physical channel based on the first resource pool list and the second resource pool list And
   A resource setting unit for selecting the first resource pool list or the second resource pool list based on the speed of the terminal device;
   The resource setting unit
   If the speed of the terminal device does not exceed a first threshold, select a first resource pool from the first resource pool list;
   If the speed of the terminal device exceeds the first threshold, select a second resource pool from the second resource pool list;
   The mapping of the first side link physical channel and / or the DMRS within the TTI (Transmission Time Interval) of the first resource pool is the first side link within the TTI of the second resource pool. A terminal device different from physical channel mapping and / or DMRS mapping.
2. The terminal device according to claim 1, wherein, when the terminal device is out-of-coverage, the first resource pool list and the second resource pool list are given based on a pre-configuration of the terminal device.
3. The terminal device according to claim 1, wherein when the terminal device is in-coverage, the first resource pool list and the second resource pool list are given based on a received SIB (System Information Block).
4. A receiving unit for receiving the first side link physical channel and the DMRS based on a third resource pool list and a fourth resource pool list,
   The receiver is
   When the terminal device is out-of-coverage, the first side link physical channel based on the third resource pool list and the fourth resource pool list included in the preconfiguration of the terminal device And receiving the DMRS,
   The mapping of the first side link physical channel and the associated DMRS in the third resource pool included in the third resource pool list, and the first in the fourth resource pool included in the fourth resource pool list. The terminal device according to claim 1, wherein mapping of the side link physical channel and the associated DMRS is different.
5. When the terminal device is in-coverage, mapping of the first side link physical channel and the associated DMRS in the third resource pool based on parameters included in the received SIB (System Information Block), and The terminal device according to claim 4, wherein mapping of the first side link physical channel and the associated DMRS in the third resource pool is determined.
6. Transmitting a first side link physical channel and a DMRS (Demodulation Reference Signal) related to the first side link physical channel based on the first resource pool list and the second resource pool list When,
   Selecting the first resource pool list or the second resource pool list based on the speed of the terminal device;
   When the speed of the terminal device does not exceed a first threshold, selecting a first resource pool from the first resource pool list;
   If the speed of the terminal device exceeds the first threshold, selecting a second resource pool from the second resource pool list,
   The mapping of the first side link physical channel and / or the DMRS within the TTI (Transmission Time Interval) of the first resource pool is the first side link within the TTI of the second resource pool. A method different from physical channel mapping and / or DMRS mapping.

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