Terminal device, base station device, measurement method, and integrated circuit

Abstract

Techniques related to a terminal device, a base station device, a communication system, a measurement method, and an integrated circuit that can efficiently perform cell measurements are provided. The base station device sets a primary cell and one or more secondary cells for the terminal device, notifies the terminal device of a measurement target, a reporting setting including information indicating a threshold value and a reporting interval related to RSSI reporting, and a measurement identifier that links the reporting setting and the measurement target. When the reporting setting associated with each set measurement identifier includes information indicating a threshold value and a reporting interval related to RSSI reporting, the terminal device periodically reports, as measurement results, the average value of RSSIs measured over the interval of the reporting interval and the ratio of RSSIs exceeding the threshold value.

Description

[0001] This application is a divisional application of the PCT national phase application with an application date of July 12, 2016 and a national application number of 2016 80042948.0. Technical Field

[0002] Embodiments of the present invention relate to technologies for a terminal device, a base station device, a communication system, a measurement method, and an integrated circuit that efficiently perform cell measurements.

[0003] This application claims priority based on Japanese Patent Application No. 2015-144725 filed on July 22, 2015, the content of which is incorporated herein by reference. Background Art

[0004] In 3GPP (Third Generation Partnership Project), the standardization of EUTRA (Evolved Universal Terrestrial Radio Access), which enables high-speed communication, has been carried out by adopting an OFDM (Orthogonal Frequency-Division Multiplexing) communication method or flexible scheduling of a predetermined frequency / time unit called a resource block. EUTRA is sometimes also referred to as LTE (Long Term Evolution).

[0005] In 3GPP, research on LTE Advanced (also referred to as LTE-A), which enables higher-speed data transmission and is backward compatible with LTE, has been carried out. In LTE Advanced, technologies for connecting and communicating with multiple cells simultaneously (carrier aggregation technology or dual connectivity technology) are described (Non-Patent Document 1).

[0006] In Non-Patent Document 2, research on Licensed-Assisted Access (LAA) is underway. LAA is a technology that supplementarily uses frequencies in an unlicensed spectrum used by, for example, a wireless LAN (Local Area Network). Specifically, a terminal device and a base station device communicate using a cell (primary cell, described later) having a frequency in a licensed spectrum and a cell (secondary cell) having a frequency in an unlicensed spectrum added by carrier aggregation technology. The frequency for the licensed spectrum is, for example, the ISM (Industry-Science-Medical) band.

[0007] Prior art documents

[0008] Non - Patent Document 1: 3GPP TS 36.300 V12.5.0 (2015 - 03) http: / / www.3gpp.org / DynaReport / 36300.htm

[0009] Non - Patent Document 2: 3GPP TR 36.889 V1.0.1 (2015 - 06) http: / / www.3gpp.org / DynaReport / 36889.htm Summary of the invention

[0010] Technical problem to be solved by the present invention

[0011] In Non - Patent Document 2, in order to solve the interference received by a terminal device from a transmission point (cell, access point) not detected by a base station device, that is, the so - called hidden node problem, the magnitude of the signal measurement ability for each frequency (RSSI measurement) is described. However, the specific RSSI measurement process or reporting process is not disclosed or proposed. In particular, in existing measurement methods, since measurement results are reported for each cell, so far, no effective method for reporting measurement results (such as RSSI) obtained for each frequency has been considered.

[0012] Embodiments of the present invention are made in view of the above problems, and technologies related to a terminal device, a base station device, a communication system, a measurement method, and an integrated circuit that can efficiently perform measurements are provided.

[0013] Means for solving the problem

[0014] In order to achieve the above object, the following measures are taken. That is, in a terminal device according to an embodiment of the present invention, it is characterized in that: a primary cell and one or more secondary cells are set, and when, for each set measurement identifier, information indicating a threshold value and a reporting interval related to RSSI (Received Signal Strength Indicator) reporting is included in an associated reporting setting, the average value of RSSI measured in the interval of the reporting interval and the ratio of RSSI exceeding the threshold value are reported periodically as measurement results.

[0015] In addition, the base station device according to an embodiment of the present invention is characterized in that: a primary cell and one or more secondary cells are set for a terminal device, and by notifying the terminal device of a measurement object, a reporting setting including information indicating a threshold value and a reporting interval related to RSSI (Received Signal Strength Indicator) reporting, and a measurement identifier linking the reporting setting and the measurement object, the terminal device is caused to periodically report, as measurement results, the average value of RSSI measured over the reporting interval and the ratio of RSSI exceeding the threshold value.

[0016] In addition, the measurement method of a terminal device according to an embodiment of the present invention is characterized by at least the following steps: a step of setting a primary cell and one or more secondary cells; and a step of periodically reporting, as measurement results, the average value of RSSI measured over the reporting interval and the ratio of RSSI exceeding the threshold value when, for each set measurement identifier, the associated reporting setting includes information indicating a threshold value and a reporting interval related to RSSI (Received Signal Strength Indicator) reporting.

[0017] In addition, the measurement method of a base station device according to an embodiment of the present invention is characterized by a step of setting a primary cell and one or more secondary cells for a terminal device; and a step of causing the terminal device to periodically report, as measurement results, the average value of RSSI measured over the reporting interval and the ratio of RSSI exceeding the threshold value by notifying the terminal device of a measurement object, a reporting setting including information indicating a threshold value and a reporting interval related to RSSI (Received Signal Strength Indicator) reporting, and a measurement identifier linking the reporting setting and the measurement object.

[0018] In addition, the integrated circuit installed in a terminal device according to an embodiment of the present invention is characterized in that the integrated circuit causes the terminal device to at least perform the following functions: a function of setting a primary cell and one or more secondary cells; and a function of periodically reporting, as measurement results, the average value of RSSI measured over the reporting interval and the ratio of RSSI exceeding the threshold value when, for each set measurement identifier, the associated reporting setting includes information indicating a threshold value and a reporting interval related to RSSI (Received Signal Strength Indicator) reporting.

[0019] In addition, the integrated circuit installed in the base station device according to the embodiment of the present invention is characterized in that it enables the base station device to perform at least the following functions: a function of setting a primary cell and one or more secondary cells for the terminal device; and a function of notifying the terminal device of a measurement object, a report setting including information indicating a threshold value and a reporting interval related to RSSI (Received Signal Strength Indicator) reporting, and a measurement identifier linking the report setting and the measurement object, thereby enabling the terminal device to periodically report the average value of RSSI measured over the reporting interval and the ratio of RSSI exceeding the threshold value as measurement results.

[0020] In this specification, each embodiment discloses technologies related to a terminal device, a base station device, a communication system, a measurement method, and an integrated circuit that can effectively perform measurements. The communication methods applicable to each embodiment are not limited to communication methods compatible with EUTRA such as EU TRA or Advanced EUTRA.

[0021] For example, the technologies in this specification can be used in communication systems using various access methods such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single carrier FDMA (SC-FDMA), and others. In addition, in this specification, systems and networks can be used interchangeably.

[0022] Advantages of the Invention

[0023] According to the embodiment of the present invention, technologies related to a terminal device, a base station device, a communication system, a measurement method, and an integrated circuit that can efficiently perform measurements can be provided. Brief Description of the Drawings

[0024] Figure 1 A block diagram showing an example of the schematic configuration of a terminal device according to an embodiment of the present invention.

[0025] Figure 2 A block diagram showing an example of the schematic configuration of a base station device according to an embodiment of the present invention.

[0026] Figure 3 A diagram for explaining an example of parameters related to a measurement object according to an embodiment of the present invention.

[0027] Figure 4 A diagram for explaining an example of parameters related to a report setting according to an embodiment of the present invention.

[0028] Figure 5 A diagram for explaining an example of an RSSI reporting method according to an embodiment of the present invention.

[0029] Figure 6 This is a diagram for explaining another example of parameters related to report setting according to an embodiment of the present invention.

[0030] Figure 7 This is a diagram for explaining the correspondence of measurement objects according to an embodiment of the present invention.

[0031] Figure 8 This is a diagram for explaining the correspondence between measurement objects and a measurement object list according to an embodiment of the present invention.

[0032] Figure 9 This is a diagram for explaining an example of parameters related to measurement objects according to an embodiment of the present invention.

[0033] Figure 10 This is a diagram for explaining an example of parameters related to measurement objects according to an embodiment of the present invention.

[0034] Figure 11 A diagram showing a protocol stack for processing control data in a terminal device and a base station device according to an embodiment of the present invention.

[0035] Figure 12 A diagram showing a protocol stack for processing user data in a terminal device and a base station device according to an embodiment of the present invention.

[0036] Figure 13 This is a diagram for explaining a discovery signal according to an embodiment of the present invention. Detailed implementation manners

[0037] The following briefly explains the technologies related to each embodiment of the present invention.

[0038] [Channel / Signal]

[0039] LTE (EUTRA) channels are composed of logical channels, transport channels, and physical channels. A channel refers to the medium for transmitting and receiving signals. A logical channel defines the types of data transmission services for transmitting and receiving data in the Medium Access Control (MAC) layer. A transport channel defines the characteristics of the data transmitted in the radio interface and how to transmit the data.

[0040] A physical channel refers to the physical medium for transmitting the data forwarded to the physical layer through a transport channel. In the embodiments of the present invention, a physical channel can be used interchangeably with a signal. Also, in a communication system that has evolved EUTRA (LTE, LTE-A), new channels may be added to the physical channel, or its structure (composition) or format may be changed or added. Even in such cases, it does not affect the description of each embodiment of the present invention.

[0041] Scheduling of physical channels or physical signals using radio frame management in EUTRA. A radio frame is 10 ms, and a radio frame consists of 10 subframes. Further, a subframe consists of two time slots (i.e., a subframe is 1 ms and a time slot is 0.5 ms). In addition, management is performed by using resource blocks as the minimum unit for scheduling the allocation of physical channels. A resource block is defined in a fixed frequency domain consisting of a set of multiple subcarriers (e.g., 12 subcarriers) on the frequency axis and a time domain consisting of a fixed transmission time interval (1 time slot).

[0042] Description of the downlink in EUTRA. The logical channels of the downlink include Broadcast Control Channel BCCH (Broadcast Control Channel), Paging Control Channel PCCH (Paging Control Channel), Common Control Channel CCCH (Common Control Channel), Dedicated Control Channel DCCH (Dedicated Control Channel), and Dedicated Traffic Channel DTCH (Dedicated Traffic Channel).

[0043] The Broadcast Control Channel BCCH is a logical channel for broadcasting system information. The Paging Control Channel PCCH is a logical channel for transmitting paging information and is used when the network calls the terminal device or notifies the update of system information. The Common Control Channel CCCH is a logical channel for transmitting control information between the terminal device and the network, and in the downlink, it is used by the base station device when the state of the terminal device has not been transferred to the state of being connected to the network through Radio Resource Control (RRC: Radio Resource Control) (RRC connected state, RRC_CONNECTED).

[0044] The Dedicated Control Channel DCCH is a point-to-point two-way channel and is a logical channel for transmitting dedicated control information between the terminal device and the network. The Dedicated Control Channel DCCH can be used between the terminal device in the RRC connected state and the base station device. The Dedicated Traffic Channel DTCH is a point-to-point two-way channel, which is a channel dedicated to one terminal device and is a logical channel for forwarding (transmitting) user information (unicast data).

[0045] The downlink transmission channels include Broadcast Channel BCH (Broadcast Channel), Paging Channel PCH (Paging Channel), and Downlink Shared Channel DL-SCH (Downlink Shared Channel).

[0046] The broadcast channel BCH is broadcast to the entire cell in a fixed and predefined format (transport format). The downlink shared channel DL-SCH supports HARQ (Hybrid Automatic Repeat Request), link adaptation control, dynamic or semi-static resource allocation, and discontinuous reception (DRX: Discontinuous Reception). In addition, the paging channel PCH supports discontinuous reception that is broadcast to the entire cell.

[0047] Describe the physical channels and physical signals of the EUTRA downlink.

[0048] The synchronization signal consists of three types of primary synchronization signals (PSS) and secondary synchronization signals (SSS) composed of 31 symbols alternately arranged in the frequency domain. The signal obtained by combining the primary synchronization signal and the secondary synchronization signal represents 504 cell identifiers (Physical Cell Identity; PCI) for identifying the base station device and the frame timing for wireless synchronization. The terminal device determines the physical cell ID of the synchronization signal received through cell search.

[0049] The downlink reference signal is classified into multiple types according to its use. For example, the cell-specific reference signal (CRS) is a pilot signal transmitted at a prescribed power for each cell and is a downlink reference signal that is periodically repeated in the frequency domain and time domain based on a prescribed rule. The terminal device can measure the reception quality of each cell by receiving the cell-specific RS. In addition, the terminal device can use the cell-specific RS as a reference signal for demodulating the physical downlink control channel or the physical downlink shared channel transmitted together with the cell-specific RS.

[0050] As the sequence for the cell-specific RS, a sequence that can be identified for each cell is used. The cell-specific RS can be transmitted in all downlink subframes from the base station device or only in the downlink subframes specified by the base station device. In addition, the terminal device can receive the cell-specific RS in all downlink subframes or can only receive the cell-specific RS in the downlink subframes specified by the base station device.

[0051] In addition, downlink reference signals are also used to estimate changes in the propagation path of the downlink. The downlink reference signal used to estimate changes in the propagation path is called the Channel State Information Reference Signal (CSI-RS, CSI reference signal). In addition, the CSI reference signal may not actually transmit a signal or transmit at zero power. On the other hand, the CSI-RS that actually transmits a signal can be called the Non-Zero Power CSI-RS (NZP CSI-RS: Non Zero Power Channel State Information Reference Signals). In addition, the radio resources of the downlink used to measure the interference component are called the Channel State Information-Interference Measurement Resource (CSI-IMR: Channel State Information-Interference Measurement Resource) or CSI-IM resource.

[0052] In addition, the downlink reference signal set separately for the terminal device is called the UE specific Reference Signal (URS) and the Demodulation Reference Signal (DMRS), and is referred to for the channel propagation path compensation process when demodulating the physical downlink control channel, the extended physical downlink control channel, or the physical downlink shared channel.

[0053] For the purpose of notifying (setting) the master information block (MIB: Master information block) commonly used by the terminal devices in the cell, the physical broadcast channel (PBCH; Physical Broadcast Channel) is transmitted. The base station device notifies (transmits) the master information block message including the MIB through the physical broadcast channel. The information notified (set) to the terminal device in the master information block message, that is, the information notified in the MIB includes the configuration information of the physical channel (PHICH) related to the downlink frequency bandwidth, the system frame number, and Hybrid ARQ, etc.

[0054] The base station device uses System Information Block Type 1 (SIB1) and other types of system information messages (e.g., System Information Block Types 2 to n (n is a natural number)) to send cell common information other than the master information block to the terminal device, where the System Information Block Type 1 has a pre-defined subframe position and period, and the other types of system information messages are dynamically scheduled within a system information window (SI-window) specified in the System Information Block Type 1.

[0055] Here, the master information block message, the System Information Block Type 1 message, and the system information message are layer 3 messages (RRC messages). Also, in this specification, system information (broadcast information) refers to these RRC messages, or the information (information elements) notified by the master information block and each system information block.

[0056] The system information message is notified via the physical downlink shared channel in the radio resources indicated by the physical downlink control channel, and one of the system information classified according to the usage purpose (System Information Block Types 2 to n (SIB 2 to SIBn (n is a natural number))) is sent to the corresponding system information window.

[0057] As system information, the Cell Global Identifier (CGI) indicating the identifier of a single cell, the Tracking Area Identifier (TAI) for managing the paging area to be searched, random access setting (common random access setting) information, timing adjustment information, common radio resource setting information for each cell, neighboring cell list information (Neighboring cell list) of the same frequency (different frequencies, different RATs), uplink access restriction information, etc. are notified.

[0058] The physical downlink control channel (PDCCH) is transmitted at the beginning of each subframe using several OFDM symbols (e.g., 1 to 4 OFDM symbols). The enhanced physical downlink control channel (EPDCCH) is a physical downlink control channel configured in the OFDM symbols of the physical downlink shared channel PDSCH. The PDCCH or EPDCCH is used for the purpose of notifying the terminal device of radio resource allocation information according to the scheduling of the base station device, control information indicating the adjustment amount of the increase or decrease of the transmission power, etc. Hereinafter, when simply referred to as the physical downlink control channel (PDCCH), if not specified otherwise, it means both the PDCCH and the EPDCCH physical channels.

[0059] Before transmitting and receiving layer 2 messages (MAC-CE) and layer 3 messages (paging, system information, etc.), the terminal device monitors the physical downlink control channel sent to the device itself and receives the physical downlink control channel sent to the device itself. Therefore, it is necessary to obtain from the physical downlink control channel the radio resource allocation information that is called downlink grant during transmission and downlink grant (also called downlink allocation) during reception. In addition to being transmitted by the above-mentioned OFDM symbols, the physical downlink control channel can also be configured to be transmitted within the area of resource blocks separately (dedicated) allocated by the base station device for the terminal device.

[0060] In the physical downlink shared channel (PDSCH; Physical Downlink Shared Channel), in addition to being used to transmit downlink data, it is also used to notify the terminal device of layer 3 messages such as paging and system information. The radio resource allocation information of the physical downlink shared channel is indicated (notified) through the physical downlink control channel. The physical downlink shared channel is configured to be transmitted in OFDM symbols other than the OFDM symbols transmitting the physical downlink control channel. That is, the physical downlink shared channel and the physical downlink control channel are time-division multiplexed within one subframe.

[0061] The broadcast channel BCH is mapped to the physical broadcast channel PBCH. The paging channel PCH and the downlink shared channel DL-SCH are mapped to the physical downlink shared channel PDSCH. The physical downlink control channel PDCCH is used separately by the physical channel.

[0062] In addition, in the downlink, the paging control channel PCCH is mapped to the paging channel PCH. The broadcast control channel BCCH is mapped to the broadcast channel BCH and the downlink shared channel DL-SCH. The common control channel CCCH, the dedicated control channel DCCH, and the dedicated traffic channel DTCH are mapped to the downlink shared channel DL-SCH.

[0063] Hereinafter, the uplink in EUTRA will be described. The logical channels of the uplink include the common control channel CCCH (Common Control Channel), the dedicated control channel DCCH (Dedicated Control Channel), and the dedicated traffic channel DTCH (Dedicated Traffic Channel).

[0064] The common control channel CCCH is a logical channel used to transmit control information between a terminal device and a network. In the uplink, it is used by the terminal device when the state of the terminal device has not been transferred to the state of being connected to the network via Radio Resource Control (RRC) (RRC connected state, RRC_CONNECTED), i.e., in the RRC idle state, RRC_IDLE.

[0065] The dedicated control channel DCCH is a point-to-point two-way channel and is a logical channel used to transmit dedicated control information between a terminal device and a network. The dedicated control channel DCCH can be used between a terminal device in the RRC connected state and a base station device. The dedicated traffic channel DTCH is a point-to-point two-way channel, which is a channel dedicated to one terminal device and is a logical channel for forwarding user information (unicast data).

[0066] The uplink transmission channels include the uplink shared channel UL-SCH (Uplink Shared Channel) and the random access channel RACH (Random Access Channel).

[0067] The uplink shared channel UL-SCH supports Hybrid Automatic Repeat Request (HARQ), dynamic adaptive modulation control, dynamic or semi-static resource allocation, and discontinuous transmission (DTX: Discontinuous Transmission). In the random access channel RACH, limited control information is transmitted.

[0068] Describe the physical channels and physical signals of the EUTRA uplink.

[0069] The Physical Uplink Control Channel (PUCCH; Physical Uplink Control Channel) is used to perform the reception acknowledgement (ACK / NACK; Acknowledgement / Negative Acknowledgement) of downlink data transmitted by the Physical Downlink Shared Channel and downlink propagation path (channel state) information (CSI; Channel State Information), and the uplink radio resource allocation request (radio resource request, scheduling request (SR; Scheduling Request)).

[0070] CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), PTI (Precoding Type Indicator), and RI (Rank Indicator). Each Indicator can be expressed as Indication.

[0071] The Physical Uplink Shared Channel (PUSCH) mainly transmits uplink data and uplink control data, and can also include control data such as CSI and ACK / NACK. In addition, it is used to transmit uplink data and is also used to notify the base station device of uplink control information as a layer 2 message and a layer 3 message from the terminal device. In addition, the radio resource allocation information of the physical uplink shared channel is indicated by the physical downlink control channel in the same way as the downlink.

[0072] The uplink reference signal (also known as the uplink pilot signal, uplink pilot channel) includes the demodulation reference signal (DMRS; Demodulation Reference Signal) that the base station device uses to demodulate the physical uplink control channel PUCCH and / or the physical uplink shared channel PUSCH, and the sounding reference signal (SRS; Sounding Reference Signal) that the base station device mainly uses to estimate the uplink channel state. In addition, the sounding reference signal includes a periodic sounding reference signal (Periodic SRS) that is transmitted periodically and an aperiodic sounding reference signal (Aperiodic SRS) that is transmitted when indicated by the base station device.

[0073] The Physical Random Access Channel (PRACH) is a channel for notifying (setting) the preamble sequence and has a guard time. The preamble sequence is configured to notify information to the base station device through multiple sequences. For example, when 64 sequences are prepared, 6-bit information can be indicated to the base station device. The physical random access channel is used as a method for the terminal device to access the base station device.

[0074] The terminal device uses the physical random access channel for a radio resource request for the uplink when the physical uplink control channel is not configured, or for requesting from the base station device the timing adjustment information (also referred to as Timing Advance; TA) required to adjust the uplink transmission timing to the reception timing window of the base station device. In addition, the base station device can use the physical downlink control channel to request the start of a random access procedure from the terminal device.

[0075] In the uplink, the common control channel CCCH, dedicated control channel DCCH, and dedicated traffic channel DTCH are mapped to the uplink shared channel UL-SCH.

[0076] The uplink shared channel UL-SCH is mapped to the physical uplink shared channel PUSCH. The random access channel RACH is mapped to the physical random access channel PRACH. The physical uplink control channel PUCCH is used separately by the physical channel.

[0077] Moreover, since other physical channels or physical signals have little relevance to the embodiments of the present invention, their detailed descriptions will be omitted. Physical channels or physical signals for which the description is omitted include the physical control format indicator channel (PCFICH), physical hybrid ARQ indicator channel (PHICH), physical multicast channel (PMCH), etc.

[0078] In addition, logical channels, transport channels, physical channels, or physical signals used for direct communication (Device to Device, D2D) between terminal devices in EUTRA (these are also collectively referred to as side link channels) are also omitted from the description.

[0079] [Protocol stack]

[0080] As Figure 11 shown, the protocol stack for processing control data of the terminal device and the base station device is at least divided into a physical (PHY) layer, MAC layer, RLC layer, PDCP layer, and RRC layer. In addition, as Figure 12 shown, the protocol stack for processing user data of the terminal device and the base station device is at least divided into a physical (PHY) layer, MAC layer, RLC layer, and PDCP layer. The terminal device and / or the base station device has an entity for performing functions / roles in each layer at each layer.

[0081] Figure 11 and Figure 12 The order of the layers in Figure 12 indicates the upper / lower relationship between the layers. For example, the RRC layer is the upper layer of the PDCP layer, RLC layer, MAC layer, and PHY layer. In addition, the MAC layer is the lower layer of the RRC layer, PDCP layer, and RLC layer, and is the upper layer of the PHY layer.

[0082] The physical layer (Physical layer: PHY layer) provides a transmission service to the upper layer using physical channels (Physical Channel). The PHY layer is connected to the Medium Access Control layer (Medium Access Control layer: MAC layer) through a transport channel. Data is moved between the layers (layer: layer) in the MAC layer and PHY layer through the transport channel. Data is exchanged between the physical layers of the terminal device and the base station device through the physical channel.

[0083] The MAC layer is connected to the Radio Link Control layer (RLC layer) via a logical channel. The logical channels are distinguished according to the type of information to be transmitted and are divided into a control channel for transmitting control information and a traffic channel for transmitting user information.

[0084] The functions in the MAC layer include the mapping between logical channels and transport channels, the control of the PHY layer for performing discontinuous reception (DRX) and discontinuous transmission (DTX), the information for notifying the transmission power, HARQ (error correction) control, the processing of priorities between terminal devices through timing scheduling, the processing of priorities of logical channels, the selection of transmission formats, etc. These functions of the MAC layer are executed by the MAC entity.

[0085] The functions of the RLC layer include the forwarding of data (Protocol Data Unit: PDU) from the upper layer, the ARQ (error correction) function, the segmentation (Segmentation) and concatenation (Concatenation) of RLC data, the re-segmentation of PDU, the re-ordering of PDU sequence, the detection of duplicate data, the detection of protocol errors, the discarding of RLC data, etc. These functions of the RLC layer are executed by the RLC entity.

[0086] The functions of the Packet Data Convergence Protocol layer (PDCP layer) include the transfer of user data or control data, header compression for efficiently transmitting user data, i.e., IP packets, over the radio section, sequence number management, encryption and decryption of user data or control data, integrity protection of control data to prevent tampering, duplicate detection, and discarding of data, etc. These functions of the PDCP layer are executed by PDCP entities.

[0087] In the Radio Resource Control layer (RRC layer), only control information is defined. The functions of the RRC layer include broadcasting system information (including NAS public information, cell selection parameters, neighboring cell information, setting of common channels, ETWS (Earthquake Tsunami Warning System) / CMAS (Commercial Mobile Alert System)), RRC connection control (paging, establishment / change / release of RRC connections, anti-tampering setting, encryption setting, mobility control, setting / change / release of Radio Bearers (RB), radio setting control (allocation / change of ARQ setting, HARQ setting, DRX setting, etc.), addition / change / release of secondary cells, QoS control, return from radio link failure, etc.

[0088] In addition, the functions of the RRC layer include inter-RAT (inter-Radio Access Technology) mobility, general protocol error handling, measurement setting and reporting, storage and reporting of terminal device logs, etc. These functions of the RRC layer are executed by RRC entities.

[0089] There are two types of RBs: Signaling Radio Bearer (SRB) and Data Radio Bearer (DRB). The SRB is used as a path for transmitting layer 3 messages as control information. The DRB is used as a path for transmitting user information. The setting (addition, change, release) of each RB is performed between the RRC entities of the base station device and the terminal device.

[0090] The Layer 3 message is a message processed in the protocol of the control plane (CP (Control - plane, C - Plane)) exchanged between the RRC (Radio Resource Control) entities of the terminal device and the base station device, and can be used interchangeably with RRC signaling or RRC messages. Also, with respect to the control plane, the protocol for processing user data is called the user plane (UP (User - plane, U - Plane)).

[0091] [Discovery Signal]

[0092] The base station device can send a discovery signal (DS: Discovery Signal) to the terminal device. The discovery signal is also referred to as a discovery reference signal (DRS: Discovery Reference Signal). The discovery signal can be sent in a discovery signal measurement timing configuration opportunity (DMTC Occasion (hereinafter referred to as the discovery signal transmission opportunity)) determined by the discovery signal measurement timing configuration (DMT C).

[0093] The discovery signal in the discovery signal transmission opportunity (DMTC Occasion) can be sent from a base station device that has turned off downlink transmission (stopped downlink transmission). In other words, a base station device that has turned off downlink transmission can send only the discovery signal in the measurement interval based on the discovery signal measurement timing configuration (i.e., the discovery signal transmission opportunity) and stop sending downlink transmission in other intervals.

[0094] The base station device uses RRC signaling to notify the terminal device of the discovery signal measurement timing configuration. The terminal device notified of the discovery signal measurement timing configuration applies the discovery signal measurement timing configuration to the frequency to be measured and performs measurement. That is, the terminal device performs measurement of the discovery signal in the measurement interval based on the discovery signal measurement timing configuration (i.e., the discovery signal transmission opportunity). Also, the terminal device notified of the discovery signal measurement timing configuration can assume that the discovery signal will not be sent in sub - frames other than the discovery signal transmission opportunity.

[0095] The discovery signal can be composed of a combination of one or more physical signals. For example, the discovery signal can be composed of PSS, SSS, and CRS. The terminal device can use the CRS as the discovery signal to perform measurements of RSRP and RSRQ. In addition, in addition to including PSS, SSS, and CRS, the discovery signal can also include CSI - RS. The terminal device can use the CSI - RS as the discovery signal to measure RSRP and RSRQ.

[0096] The number of subframes of a discovery signal transmission opportunity (DMTC Occasion) in a certain cell is 1 to 5 in FDD (Frame structure type 1), and 2 to 5 in TDD (Frame structure type 2). The number of subframes is indicated during the discovery signal period (ds - OccasionDuration) and is notified by the base station device through RRC signaling. The terminal device can assume that there is one discovery signal transmission opportunity in each period (discovery signal measurement timing configuration period or DMTC period (dmtcPeriodicity)) set by the RRC signaling.

[0097] Each physical signal can be assumed as follows respectively. In all downlink subframes during the discovery signal period, and in the downlink time slots (DwPTS: downlink Pilot time slot) of all special subframes (subframes where uplink and downlink are switched in TDD), CRS is transmitted from antenna port 0. PSS is transmitted in the first subframe during the discovery signal period in FDD. Or, in the second subframe during the discovery signal period in TDD, PSS is transmitted. SSS is transmitted in the first subframe during the discovery signal period. During the discovery signal period, CSI - RS is transmitted in 0 or one or more subframes, and its power is transmitted with non - zero (i.e., non - zero power CSI - RS).

[0098] Figure 13 It is a diagram for explaining the discovery signal according to an embodiment of the present invention. Figure 13 (a) A diagram showing the transmission timing of the existing discovery signal and parameters related to the discovery signal. A discovery signal transmission opportunity (DMTC occasion) exists at intervals of the DMTC period (dmtcPeriodicity). In addition, the discovery signal transmission opportunity (DMTC occasion) starts from the timing that is only delayed by the DMTC offset (dmtcOffset) from the first frame of the DMTC period (dmtcPeriodicity). The discovery signal (DS) is transmitted during the discovery signal period (ds - OccasionDuration).

[0099] Figure 13 (b) A diagram showing the transmission timing of the discovery signal applied to the unlicensed band and parameters related to the discovery signal. The relationship between the discovery signal transmission opportunity (DMTC occasion), the DMTC period (dmtcPeriodicity), and the DMTC offset (DmtcOffset) is the same as that in the prior art ( Figure 13is the same as (a)). In the unlicensed band (LAA cell), a busy state occurs where the base station device cannot send a signal based on LBT. When this busy state occurs during the discovery of a signal transmission opportunity (DMTC occasion), as Figure 13 (b) shows, the transmission timing of the discovered signal may sometimes shift after the busy state is eliminated.

[0100] That is, when the busy state (based on LBT) is released in the discovery of a signal transmission opportunity (DMTC occasion) by the base station device, the base station device re - transmits the discovery signal in the remaining discovery signal transmission opportunities (DMTC occasion). When the terminal device fails to detect the discovery signal at the specified timing, considering the case where the discovery signal was not sent due to the busy state, the terminal device attempts to detect the discovery signal in the remaining discovery signal transmission opportunities (DMT occasion). That is, at this time, the terminal device attempts to detect the discovery signal at a timing different from the prior art.

[0101] [Wireless network]

[0102] The communicable range (communication area) of each frequency controlled by the base station device is regarded as a cell. At this time, the communication area covered by the base station device can have different sizes and different shapes for each frequency. Moreover, the area to be covered may be different for each frequency. A wireless network that co - exists with cells having different types of base station devices and cell radius sizes in the same frequency or different frequency regions to form a communication system is called a heterogeneous network.

[0103] The terminal device operates by regarding the inside of the cell as the communication area. When the terminal device moves from one cell to another, it moves to another suitable cell through the cell reselection process when not in a wireless connection (not communicating), and through the handover process when in a wireless connection (communicating). A suitable cell is generally a cell that is judged, based on the information specified by the base station device, not to be prohibited from accessing by the terminal device, and whose downlink reception quality satisfies the specified conditions.

[0104] The base station device manages, for each frequency, the cell that is the area where the terminal device can communicate with the base station device. One base station device can manage multiple cells. According to the size of the area where it can communicate with the terminal device (cell size), cells are classified into multiple types. For example, a cell is classified into a macro cell and a small cell. A small cell is generally a cell that covers a radius of several meters to dozens of meters. Small cells can also be divided into femto cells, pico cells, nano cells, etc. according to the area size.

[0105] When a terminal device can communicate with a certain base station device, the cell in the base station device that is used to communicate with the terminal device is the serving cell, and other cells that are not used for communication are called neighboring cells.

[0106] [Carrier Aggregation]

[0107] In addition, the terminal device and the base station device can apply carrier aggregation to aggregate (aggregate) frequencies (component carriers or frequency bands) of multiple different frequency bands to generate one frequency (frequency band). In carrier aggregation, as component carriers, there are uplink component carriers corresponding to the uplink and downlink component carriers corresponding to the downlink. In this specification, frequency and frequency band can be used interchangeably.

[0108] For example, when aggregating 5 component carriers with a frequency bandwidth of 20 MHz through carrier aggregation, a terminal device with carrier aggregation capability regards these as a frequency bandwidth of 100 MHz. And the component carriers to be aggregated can be continuous frequencies, or frequencies where all or some of the component carriers are discontinuous. For example, when the available frequency bands are the 800 MHz band, the 2 GHz band, and the 3.5 GHz band, one component carrier can be in the 800 MHz band, another component carrier can be in the 2 GHz band, and another component carrier can be in the 3.5 GHz band for transmission.

[0109] In addition, it is also possible to aggregate multiple continuous or discontinuous component carriers in the same frequency band. The frequency bandwidth of each component carrier can be a frequency bandwidth (e.g., 5 MHz or 10 MHz) narrower than the frequency bandwidth that the terminal device can receive (e.g., 20 MHz), and the aggregated frequency bandwidths can be different. Considering compatibility, the frequency bandwidth is preferably the same as any one of the frequency bandwidths of the existing cells, but it can also have a frequency bandwidth different from that of the existing cells.

[0110] Moreover, the number of uplink component carriers assigned (set, added) by the base station device to the terminal device is preferably the same as or less than the number of downlink component carriers.

[0111] The terminal device and the base station device manage a cell composed of a certain uplink component carrier and a downlink component carrier fixedly connected to the uplink component carrier by the cell as the primary cell (PCell: Primary cell). In addition, the terminal device and the base station device manage a cell composed of component carriers other than the primary cell as a secondary cell (SCell: Secondary cell). The frequency of the primary cell is called the primary frequency, and the frequency of the secondary cell is called the secondary frequency.

[0112] The terminal device receives paging messages, detects updates of broadcast information, performs initial access procedures, sets security information, etc. in the primary cell, and these may not be performed in the secondary cell. The primary cell and the secondary cell are collectively referred to as the serving cell (Serving cell).

[0113] Moreover, one or more LAA cells can be aggregated through carrier aggregation. In this case, it is preferable to add the LAA cell as a secondary cell.

[0114] The primary cell is outside the scope of activation and deactivation control (i.e., the primary cell is considered to be always active), while the secondary cell has a cell state (state) based on activation and deactivation. Regarding the cell state, the state in which the cell is activated (activation state) is called the Activated state (activation state), and the state in which the cell is deactivated (deactivation state) is called the Deactivate d state (inactive state).

[0115] The state of the cell (secondary cell) may change due to a clear designation (notification, indication) of the state by the base station device, or may change based on timer information (secondary cell deactivation timer; deactivation timer) for timing by the terminal device for each component carrier (secondary cell).

[0116] Moreover, carrier aggregation is communication using multiple component carriers (frequency bands) of multiple cells, and is also called cell aggregation. Moreover, the terminal device can be wirelessly connected to the base station device via a relay station device (or repeater) for each frequency. That is, the base station device according to each embodiment of the present invention can be replaced by a relay station device.

[0117] [LAA]

[0118] The unauthorized area is called the unlicensed band. A cell that uses the frequencies of the unlicensed band and is set as an additional resource for the cell using the frequencies of the licensed band is called an LAA cell. The frequencies used by the LAA cell can be shared with other communication systems and / or other operators. When the frequencies of the LAA cell are shared, it is necessary to consider fairness with other communication systems and / or other operators. That is, it is desirable to apply a fair frequency sharing technique (method) in the communication in the LAA cell.

[0119] An example of a fair frequency sharing technique is LBT (Listen-Before-Talk). LBT is that before the base station device or the terminal device transmits a signal at the frequency of the unlicensed band, it measures (detects) the power (interference signal, received power, received signal, noise power, noise signal, etc.) of the frequency, thereby identifying (detecting, assuming, determining) whether the frequency is idle (idle state) or busy (non-idle state). The state of the frequency being idle is also called the silent period.

[0120] When the base station device or the terminal device identifies that the frequency is in the idle state based on LBT, it can transmit a signal in the LAA cell at a specified timing. When the base station device or the terminal device identifies that the frequency is in the busy state based on LBT, it should avoid transmitting a signal in the LAA cell at a specified timing. In this way, by using LBT, it can be controlled not to interfere with the signals transmitted by other base station devices and / or terminal devices including other communication systems and / or other LTE operators.

[0121] The LBT process is defined as a mechanism in which a certain base station device or terminal device applies CCA (Clear Channel Assessment) before using the frequency (channel). CCA means that in the transmission timing, in order to determine whether the relevant frequency is busy or idle, the presence or absence of a signal is detected at the frequency using an appropriate threshold level. And, in this embodiment, the definition of CCA can be equivalent to the definition of LBT.

[0122] In CCA, various methods can be used as the method for detecting the presence or absence of other signals. For example, CCA can be performed based on whether the interference power at a certain frequency exceeds a certain threshold. In addition, for example, CCA can be performed based on whether the received power of a specified signal or channel at a certain frequency exceeds a certain threshold. The threshold can be predefined, and if it is a terminal device, it can also be notified from the system information of the base station device or a separate radio resource control message, and if it is a base station device, it can also be notified by the upper wireless station device (for example, the MME entity).

[0123] For example, a terminal device or a base station device can perform CCA by measuring the RSSI (Received Signal Strength Indicator) of a frequency. RSSI is the total received power including the power from a serving cell or an adjacent cell in the same channel, the interference power from an adjacent channel, the thermal noise power, etc., and is an indicator representing the signal strength (received strength).

[0124] An LAA cell can be defined as a cell different from an existing secondary cell in an authorized band. For example, a setting different from the setting of a secondary cell using an authorized band can be notified to the LAA cell. An LAA cell can be defined as a form of a secondary cell. In addition, an existing secondary cell is also referred to as a first secondary cell, and an LAA cell is also referred to as a second secondary cell. In addition, an existing primary cell and a secondary cell are also referred to as a first serving cell, and an LAA cell is also referred to as a second serving cell.

[0125] An unlicensed band is a frequency different from an authorized band allocated as a dedicated frequency to a specified operator. For example, an unlicensed band is a frequency of a band that can be freely used by non-operators such as wireless LAN. In addition, for example, an unlicensed band is a frequency not set in dual connectivity or stand-alone operation. That is, the frequency of the unlicensed band is a frequency that cannot be set in a primary cell (or a secondary primary cell), and is a frequency that can only be set in a secondary cell.

[0126] Moreover, with the progress of technology, the frequency set in an LAA cell is not limited to an unlicensed band, and can also be set in dual connectivity or stand-alone operation. That is, in the future, unlicensed frequencies can also be used in a primary cell (or a primary-secondary cell).

[0127] An LAA cell can be a cell that is composed of a radio frame, physical signals, and / or physical channels in LTE, and uses a different method from the existing method for L1 processes, L3 processes (RRC processes, measurement methods), etc.

[0128] For example, in an LAA cell, a specified signal and / or channel set (transmitted) in a part of an existing primary cell and / or secondary cell may not be set. The specified signal and / or channel includes CRS, DS, PDCCH, EPDCCH, PDSCH, PSS, SSS, PBCH, PHICH, PCFICH, CSI-RS, etc.

[0129] For example, the signals and / or channels that are not set in the LAA cell are as follows. And the signals and / or channels described below can be used in combination. And, in this embodiment, the signals and / or channels that are not set in the LAA cell can also be understood as the terminal does not expect the signals and / or channels sent from the LAA cell.

[0130] (1) In an LAA cell, physical layer control information may not be sent on the PDC CH but may be sent only on the EPDCCH.

[0131] (2) In an LAA cell, CRS, DMRS, URS, PDCCH, ePDCCH and / or PDSCH may not be transmitted in all subframes, and a terminal device may not be assumed to transmit in all subframes.

[0132] (3) In the LAA cell, the terminal device is assumed to send DRS, PSS and / or SSS in a designated subframe interval.

[0133] In addition, for example, in the LAA cell, only downlink component carriers or subframes are defined, and only downlink signals and / or channels are transmitted. That is, no uplink component carriers or subframes are defined in the LAA cell, and no uplink signals and / or channels are transmitted.

[0134] [Measurement]

[0135] The measurement results measured in the physical layer include RSRP (Reference Signal Received Power), RSSI (Received Signal Strength Indicator), RSRQ (Reference Signal Received Quality) and the like.

[0136] RSRP is defined as the received power of the downlink reference signal. RSRQ is defined as the received quality of the downlink reference signal. RSRQ is defined as the ratio of RSRP to RSSI, which can be obtained from the calculation formula N×RSRQ / RSSI. Here, N is the number of resource blocks corresponding to the measurement bandwidth of RSSI, and the numerator and denominator of RSRQ are composed of the same number of resource blocks.

[0137] The RSSI (E-UTRA carrier RSSI) in ETURA consists of the average value (linear average) of the total received power observed only in one or more OFDM symbols in one or more measurement subframes. In other words, RSSI is the linear average of the total received power of the OFDM symbols including the CRS (radio resources mapped to antenna port 0) of antenna port 0. RSSI is measured using a measurement bandwidth of N resource blocks. Also, when the upper layer is notified (indicated, set) to use all OFDM symbols for RSRQ measurement, RSSI is measured using all OFDM symbols (including OFDM symbols with CRS and OFDM symbols without CRS).

[0138] Hereinafter, a measurement control method (measurement method, measurement process) in a terminal device will be described. The base station device notifies the measurement setting to the terminal device using a Radio Resource Control Connection Reconfiguration message as an RRC message.

[0139] The terminal device sets the measurement parameters (information elements) included in the received measurement setting, and measures, evaluates event of measurement time, and reports measurement for the serving cell and neighboring cells (including listed cells and / or detected cells) according to the notified measurement parameters. A listed cell is a cell notified as included in the neighboring cell list of the measurement object (Measurement object(s)), and a detected cell is a cell detected by the terminal device in the frequency indicated by the measurement object but not listed in the measurement object (the cell detected by the terminal itself).

[0140] Measurements include intra-frequency measurements, inter-frequency measurements, and inter-RAT measurements. Intra-frequency measurements are measurements in the downlink frequency of the serving cell. Inter-frequency measurements are measurements in a frequency different from the downlink frequency of the serving cell. Inter-RAT measurements are measurements performed using a radio access technology (RAT: Radio Access Technology) different from the radio technology of the serving cell (e.g., EUTRA).

[0141] In the measurement settings, measurement parameters include a measurement identifier (measID), measurement object(s), reporting configuration(s), quantity configuration (quantityConfig), measurement gap configuration (measGapConfig), serving cell quality threshold (s-Measure), RSRQ measurement on all symbols (measRSRQ-OnAllSymbols), etc.

[0142] In the case where the related measurement object is EUTRA, the quantity configuration (quantityConfig) specifies the layer 3 filtering coefficient. The layer 3 filtering coefficient sets the filtering ratio (rate) between the latest measurement result and the past measurement result. The filtered result is used for event evaluation in the terminal device. Event evaluation refers to determining whether the trigger criteria of the measurement event indicated in the reporting configuration executed in the terminal device are met. The layer 3 filtering coefficient is notified separately for each quantity to be measured (i.e., for each RSRP, RSRQ, RSSI).

[0143] In the case where RSRQ measurement (measRSRQ-OnAllSymbols) is set on all symbols, the terminal device measures RSRQ in all OFDM symbols. That is, in the RSSI measurement for obtaining RSRQ, all OFDM symbols are used to measure RSSI.

[0144] Here, the measurement identifier (measID) is used to link (associate) the measurement object and the reporting configuration. The connection reporting configuration is specifically used to, in the measurement settings, set the measurement identifier (measID), a linked measurement object identifier (measObjectId), and a reporting configuration identifier (reportConfigId) by the base station device and notify them to the terminal device. That is, the measurement identifier links a measurement object and a reporting configuration. The correspondence (link) between the measurement identifier, the measurement object, and the reporting configuration can be added, changed, or deleted in the measurement settings respectively.

[0145] For each radio access technology (RAT) (e.g., UTRA-FDD, UTRA-TDD, GERAN, cdma2000, etc.), or for each frequency, the measurement object is set. In addition, the reporting configuration includes settings for EUTRA and settings for RATs other than EUTRA.

[0146] The measurement object includes a measurement object EUTRA (MeasObjectEUTRA) associated with a measurement object identifier. The measurement object identifier is a set identifier used to identify the measurement object. As described above, the setting of the measurement object is set for each radio access technology (RAT) or each frequency. The measurement object EUTRA setting for the EUTRA measurement object is applied to information on the associated EUTRA frequency and the cells of the associated EUTRA frequency. In addition, measurement object EUTRAs with different frequencies are regarded as different measurement objects and are assigned different measurement object identifiers respectively.

[0147] The measurement object EUTRA (MeasObjectEUTRA) may include a carrier frequency (carrierFreq), an allowed measurement bandwidth (AllowedMeasBandwidth), an offset frequency (offsetFreq), information related to the neighboring cell list (neighbou r cell list), information related to the black list (black list), wideband RSRQ measurement (widebandRSRQ-Meas), etc. And other parameters may be included in the measurement object EUTRA.

[0148] Hereinafter, the information included in the measurement object EUTRA will be described. The carrier frequency of the EUTRA represents the frequency of the measurement object. The allowed measurement bandwidth (AllowedMeasBandwidth) represents the maximum allowed measurement bandwidth when measuring RSRP and RSRQ at the carrier frequency of the measurement object, and is represented by the number of resource blocks. The offset frequency (offsetFreq) represents the offset value applied to the frequency of the measurement object.

[0149] When the allowed measurement bandwidth (AllowedMeasBandwidth) is 50 resource blocks (i.e., 10 MHz) or more, wideband RSRQ measurement (widebandRSRQ-Meas) is set. The wideband RSRQ measurement is notified by a boolean value (true / false value). If it is true (TRUE), the terminal device is required to measure RSRQ with a bandwidth wider than 6 resource blocks, which is the minimum value of the allowed measurement bandwidth. That is, at this time, the terminal device performs RSSI measurement with a bandwidth wider than 6 resource blocks.

[0150] In addition, the measurement target EUTRA may also include a discovery signal measurement configuration (measDS-Config). The discovery signal measurement configuration (measDS-Config) may further include setting information related to CSI-RS resource measurement (CSI-RS resource measurement configuration (MeasCSI-RS-Config)), and a discovery signal measurement timing configuration. Multiple CSI-RS resource measurement configurations may be set for each CSI-RS resource. A CSI-RS resource represents a resource unit where a CSI-RS can be transmitted.

[0151] Moreover, hereinafter, the measurement target EUTRA or the measurement target corresponding to a RAT other than EUTRA may sometimes be simply referred to as the measurement target.

[0152] The discovery signal measurement timing configuration consists of information representing the period and time offset of the discovery signal transmission opportunity (DMT C occasion) (discovery signal measurement timing configuration period offset or DMTC period offset (dmtcPeriodOffset)), and information representing the length of the discovery signal transmission opportunity (discovery signal period (ds-Occasion Duration)). The first subframe of the discovery signal transmission opportunity is generated in the system frame number and subframe number of the eligible primary cell.

[0153] dmtcPeriodOffset represents the time period of DMTC (DMTC period (d mtcPeriodicity)) and the time offset within the DMTC period (DMTC offset (d mtcOffset)). Moreover, it is preferable to set dmtcPeriodOffset for each carrier frequency. The value of the D MTC period (dmtcPeriodicity) represents a time such as 40 milliseconds, 80 milliseconds, 160 milliseconds, etc. In addition, the DMTC offset (dmtcOffset) is given according to the number of subframes less than the DMT C period. For example, when the period DMTC is 40 ms, any value from 0 - 3 9 subframes indicates the DMTC offset value.

[0154] At this time, the terminal device uses the following defined formula (1) to calculate the system frame number (SFN) of the discovery signal transmission opportunity (DMTCoccasion).

[0155] SFN mod T=FLOOR(dmtcOffset / 10) (1)

[0156] In addition, the terminal device uses the following formula (2) to calculate the subframe number respectively. And the value of T in formula (2) is defined by the following formula (3).

[0157] Subframe = dmtcOffset mod 10 (2)

[0158] T = dmtc Periodicity / 10 (3)

[0159] When the terminal device supports CRS-based discovery signal measurement, the terminal device applies DMTC to the measurement of each secondary cell in the deactivated state according to the discovery signal measurement setting (measDS-Config). In addition, the terminal device applies DMTC to the measurement of adjacent cells of the frequency of each secondary cell in the deactivated state according to the discovery signal measurement setting (measDS-Config). And preferably, DMTC is applied when it is set within the measurement object (measObject) corresponding to the frequency of the secondary cell.

[0160] When the discovery signal measurement setting (measDS-config) is set in the relevant measurement object (measObject), if the terminal device supports the measurement of the discovery signal based on CSI-RS, and the event identifier (eventId) of the relevant report setting (reportConfig) is set with an event related to CSI-RS reporting (event C1 (eventC1) or event C2 (eventC2)), then the terminal device applies DMTC to the measurement of the CSI-RS resource on the frequency indicated by the relevant measurement object (measObject) according to the discovery signal measurement setting (measDS-Config). And preferably, DMTC is applied according to the discovery signal measurement setting (measDS-Config) in the relevant measurement object (measObject).

[0161] In addition, when the discovery signal measurement setting (measDS-config) is set in the relevant measurement object (measObject), if the terminal device supports the measurement of the discovery signal based on CSI-RS, and the relevant report setting (reportConfig) includes measurement parameters related to the surrounding report of CSI-RS reporting (for example, reportStrongestCSI-RS), the terminal device applies DMTC to the measurement of the CSI-RS resource corresponding to the frequency represented by the measurement object (MeasObject) according to the discovery signal measurement setting (measDS-Config).

[0162] The report settings include report configuration EUTRA (reportConfigEUTRA) associated with a report configuration identifier (reportConfigId), etc. Hereinafter, the report configuration EUTRA may sometimes be simply referred to as the report configuration.

[0163] The report configuration identifier (reportConfigId) is an identifier for identifying a report configuration related to measurements. The report configuration EUTRA (reportConfigEUTRA) for the report configuration of EUTRA sets (establishes) the triggering criteria for measurement events reported in the measurement report cells of EUTRA.

[0164] In addition, the report configuration EUTRA (reportConfigEUTRA) may include an event identifier (eventId), a trigger quantity (triggerQuantity), a hysteresis (hysteresis), a time to trigger (timeToTrigger), a report quantity (reportQuantity), a maximum number of report cells (maxReportCells), a report interval (ReportInterval), a report amount (reportAmount), etc.

[0165] Hereinafter, the report configuration EUTRA (reportConfigEUTRA) will be described. The event identifier (eventId) is information for selecting criteria related to event triggered reporting. Here, event triggered reporting means that when the reception quality (measurement result) of a cell continuously satisfies the triggering criteria of the measurement event described below within the time to trigger, the measurement result is reported to the base station device. In addition, when the triggering criteria of the measurement event are continuously satisfied within the time to trigger, the method of reporting the measurement result a certain number of times at fixed intervals is called event triggered periodic reporting.

[0166] When the terminal device determines that the triggering criteria of a certain measurement event are continuously met within the triggering time, it can determine that the transmission process of the measurement report (triggered measurement report process) message has been triggered. During the measurement report process, the terminal device starts the transmission process of the measurement report message and sends the measurement report message including the measurement result to the base station device. The trigger quantity represents the quantity used to evaluate the triggering criteria of the measurement event and is specified by the reference signal received power (RSRP: Reference Signal Received Power) or the reference signal received quality (RSRQ: Reference Signal Received Quality). That is, the terminal device uses the quantity specified by the trigger quantity as the measurement result of the downlink reference signal (CRS or CSI-RS) and determines whether the measurement result of the measurement event specified by the event identifier (eventId) is met.

[0167] As the triggering criteria for the measurement time, for example, for the cells of EUTRA, the following A1 to A6 events are used, each including an entering condition and a leaving condition. When the terminal device determines that the entering condition of the measurement time specified by the base station device is continuously met within the triggering time, it determines that the measurement report has been triggered (the measurement report process has been triggered), and starts the transmission process of the measurement report message during the measurement report process. On the other hand, when the terminal device determines that the leaving condition of the measurement event for which the entering condition has been met is continuously met within the triggering time, it stops the transmission process related to the measurement report message.

[0168] Moreover, when report OnLeave is set for the reported measurement event, when the entering condition for the measurement event specified by the base station device is met and the leaving condition is also met, the terminal device will determine that the measurement report has been triggered (the measurement report process has been triggered).

[0169] <Event A1>

[0170] Event A1 entering condition: Ms - Hys > a1_Threshold

[0171] Event A1 leaving condition: Ms + Hys < a1_Threshold

[0172] <Event A2>

[0173] Condition for Event A2 to occur: Ms-Hys < a2_Threshold

[0174] Condition for Event A2 to end: Ms+Hys > a2_Threshold

[0175] <Event A3>

[0176] Condition for Event A3 to occur: Mn+Ofn+Ocn-Hys > Mp+Ofp+Ocp+a3_Offset

[0177] Condition for Event A3 to end: Mn+Ofn+Ocn+Hys < Mp+Ofp+Ocp+a3_Offset

[0178] <Event A4>

[0179] Condition for Event A4 to occur: Mn+Ofn+Ocn-Hys > a4_Threshold

[0180] Condition for Event A4 to end: Mn+Ofn+Ocn+Hys < a4_Threshold

[0181] <Event A5>

[0182] Condition for Event A5 to occur 1: Mp-Hys < a5_Threshold1

[0183] Condition for Event A5 to occur 2: Mn+Ofn+Ocn-Hys > a5_Threshold2

[0184] Condition for Event A5 to end 1: Mp+Hys > a5_Threshold1

[0185] Condition for Event A5 to end 2: Mn+Ofn+Ocn+Hys < a5_Threshold2

[0186] <Event A6>

[0187] Condition for Event A6 to occur: Mn+Ocn-Hys > Ms+Ocs+a6_Offset

[0188] Condition for Event A6 to end: MN+Ocn+Hys < Ms+Ocs+a6_Offset

[0189] Here, Ms is the measurement result for the serving cell (primary cell or secondary cell). Mp is the measurement result for the primary cell. Mn is the measurement result for the neighbouring cell. The terminal device evaluates each event using the measurement result Ms of the serving cell, the measurement result Mp of the primary cell, or the measurement result Mn of the neighbouring cell.

[0190] Hys refers to the hysteresis parameter for the measurement time in question. Ofn refers to the frequency-specific measurement offset value for the frequency of the neighbouring cell. Ocn refers to the cell-specific offset value for the neighbouring cell. And, in the case where Ocn is not set, the terminal device sets the offset value to 0 (zero).

[0191] Ofs is the frequency-specific offset value for the frequency of the serving cell. Ocs is the cell-specific measurement offset value for the serving cell.

[0192] Ofp is the frequency-specific offset value for the frequency of the primary cell. Ocp is the cell-specific offset value for the primary cell.

[0193] a1_Threshold refers to the threshold parameter applied to Event A1. A2_Threshold refers to the threshold parameter applied to Event A2. A3_Offset refers to the offset parameter applied to Event A3. A4_Threshold refers to the threshold parameter applied to Event A4. a5_Threshold1 and a5_Threshold2 are the threshold parameters applied to Event A5, respectively. a6_Offset is the offset parameter applied to Event A6.

[0194] In addition, similarly, Events C1 and C2 for CSI-RS resources are used as the trigger criteria for measurement events, and each includes an entering condition and a leaving condition. In the case where it is determined that the entering condition for the measurement event specified by the base station device is continuously satisfied within the trigger time, the terminal device determines that the measurement report has been triggered (the measurement report process has been triggered), and starts the transmission process of the measurement report message. On the other hand, in the case where the terminal device determines that the leaving condition of the measurement event for which the entering condition has been satisfied is continuously satisfied within the trigger time, the transmission process related to the measurement report message is stopped.

[0195] <Event C1>

[0196] Event C1 entering condition: Mcr + Ocr - Hys > c1_Threshold

[0197] Event C1 detachment condition: Mcr + Ocr + Hys < c1_Threshold

[0198] <Event C2>

[0199] Event C2 addition condition: Mcr + Ocr - Hys > Mref + Oref + c2_Offset

[0200] Event C2 detachment condition: Mcr + Ocr + Hys < Mref + Oref + c2_Offset

[0201] Here, Mcr refers to the measurement result of the CSI-RS resource (i.e., the measurement result of the CSI-RS received by the specified CSI-RS resource). Mref refers to the measurement result of the reference CSI-RS resource (the measurement result of the CSI-RS of the CSI-RS resource designated by the base station device as the reference CSI-RS resource).

[0202] Hys refers to the hysteresis parameter for the measurement event to be targeted. Ocr is the measurement offset value specific to the CSI-RS resource. Oref refers to the offset value specific to the reference CSI-RS resource.

[0203] C1_Threshold is the threshold parameter applied to Event C1. C2_Offset is the measurement offset value applied to Event C2.

[0204] Considering the above, the appropriate embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in the description of the embodiments of the present invention, in the case where the specific description of well-known functions and configurations related to the embodiments of the present invention is judged to make the gist of the embodiments of the present invention unclear, the detailed description thereof is omitted.

[0205] <First Embodiment>

[0206] The first embodiment of the present invention will be described below.

[0207] Figure 1 FIG. is a block diagram showing an example of the terminal device 1 according to the first embodiment of the present invention. The terminal device 1 is at least composed of a receiving antenna unit R01, a receiving unit 101, a demodulating unit 102, a decoding unit 103, a received data control unit 104, a physical layer control unit 105, a transmitted data control unit 106, an encoding unit 107, a modulating unit 108, a transmitting unit 109, a transmitting antenna unit T01, and a radio resource control unit 110. The "unit" in the figure is an element that realizes the functions and various processes of the terminal device 1, expressed by terms such as part, circuit, constituting device, equipment, unit, etc.

[0208] The radio resource control unit 110 is a block that executes various functions of the RRC (Radio Resource Control) layer, such as the state control, measurement control, and reporting control of the terminal device 1, the control of common control information and dedicated control information, connection control, mobility control, and radio resource control. In addition, the received data control unit 104 and the transmitted data control unit 106 are blocks that execute various functions of the MAC (Medium Access Control) layer, RLC (Radio Link Control) layer, and PDCP (Packet Data Convergence Protocol) layer for managing the data link layer.

[0209] Moreover, the terminal device 1 may be configured to include blocks with multiple receiving systems (receiver 101, demodulator 102, decoder 103) for supporting simultaneous reception of multiple frequencies (frequency bands, frequency bandwidths) or cells based on carrier aggregation and / or dual connectivity, and blocks with multiple transmitting systems (encoder 107, modulator 108, transmitter 109) for supporting simultaneous transmission of multiple frequencies (frequency bands, bandwidths) or cells. In addition, the terminal device 1 may also be configured to include multiple received data control units 104, physical layer control units 105, transmitted data control units 106, and radio resource control units 110.

[0210] Regarding the reception processing of the terminal device 1, received data control information is input from the radio resource control unit 110 to the received data control unit 104, and physical layer control information, which is control parameters for controlling each block, is input to the physical layer control unit 105. The physical layer control information is information that includes parameter settings required for the radio communication control of the terminal device 1 and is composed of reception control information and transmission control information.

[0211] The physical layer control information is set by wireless connection resource settings sent dedicatedly from the base station device 2 to the terminal device 1, cell-specific broadcast information, or system parameters, etc., and the radio resource control unit 110 inputs it to the physical layer control unit 105 as needed. The physical layer control unit 105 appropriately inputs reception control information, which is control information related to reception, to the receiver 101, demodulator 102, and decoder 103.

[0212] The received control information includes, as downlink scheduling information: information on the reception frequency band, reception timing related to physical channels and physical signaling, multiplexing methods, radio resource configuration information, and other information. In addition, the received data control information is downlink control information including secondary cell deactivation timer information, DRX (Discontinuous Reception) control information, multicast data reception information, downlink retransmission control information, etc., and includes control information related to each downlink in the MAC layer, RLC layer, and PDCP layer.

[0213] The received signal is received by the receiving antenna unit R01 and input to the receiving unit 101. The receiving unit 101 receives the signal from the base station device 2 according to the frequency and frequency band specified by the received control information. The receiving unit 101 may also include an RF circuit. The received signal is input to the demodulating unit 102. The demodulating unit 102 demodulates the signal. The demodulating unit 102 inputs the demodulated signal to the decoding unit 103. The decoding unit 103 decodes the input signal and inputs the decoded data (downlink data and downlink control data) to the received data control unit 104. In addition, the MAC control elements sent from the base station device 2 together with the respective data are also decoded by the decoding unit 103 and input to the received data control unit 104.

[0214] The received data control unit 104 performs control of the physical layer control unit 105 based on the received MAC control elements, buffer control of the decoded data, error correction control (HARQ) of the retransmitted data, etc. The respective data input to the received data control unit 104 are input (forwarded) to the radio resource control unit 110.

[0215] In addition, regarding the transmission processing of the terminal device 1, transmission data control information is input from the radio resource control unit 110 to the transmission data control unit 106, and physical layer control information, which is a control parameter for controlling each block, is input to the physical layer control unit 105. The physical layer control unit 105 appropriately inputs transmission control information, which is control information related to transmission, to the encoding unit 107, the modulating unit 108, and the transmitting unit 109. The transmission control information includes, as uplink scheduling information: encoding information, modulating information, information on the transmission frequency band, transmission timing related to physical channels and physical signaling, multiplexing methods, radio resource configuration information, and other information.

[0216] In addition, the transmission data control information is uplink control information including DTX (Discontinuous Transmission) control information, random access setting information, uplink shared channel information, logical channel priority information, resource request setting information, cell group information, uplink retransmission control information, etc. The radio resource control unit 110 may also set multiple random access setting information corresponding to multiple cells to the transmission data control unit 106 respectively. In addition, the radio resource control unit 110 manages transmission timing adjustment information and a transmission timing timer for adjusting the uplink transmission timing, and manages the state of the uplink transmission timing (transmission timing adjustment state or transmission timing non-adjustment state) for each cell (or each cell group, each TA group). The transmission timing adjustment information and the transmission timing timer are included in the transmission data control information.

[0217] Moreover, in the case where it is necessary to manage the states of multiple uplink transmission timings, the transmission data control unit 106 manages the transmission timing adjustment information corresponding to the uplink transmission timing of each cell (or cell group, TA group) among the multiple ones. The resource request setting information includes at least maximum transmission counter setting information and radio resource request prohibition timer information. The radio resource control unit 110 may also set multiple resource request setting information corresponding to multiple cells to the transmission data control unit 106 respectively.

[0218] The transmission data (uplink data and uplink control data) generated by the terminal device 1 is input from the radio resource control unit 110 to the transmission data control unit 106 at an arbitrary timing. At this time, the transmission data control unit 106 calculates the amount of the input transmission data (uplink buffer amount). In addition, the transmission data control unit 106 has a function of discriminating whether the input transmission data belongs to the data of the control plane or the data of the user plane.

[0219] In addition, when the transmission data is input to the transmission data control unit 106, the transmission data control unit 106 stores the transmission data in an uplink buffer (not shown) in the transmission data control unit 106. And the transmission data control unit 106 determines whether the radio resources required for transmitting the input transmission data are allocated to the terminal device 1. The transmission data control unit 106 selects any one of a radio resource request (scheduling request (SR)) using the physical uplink shared channel PUSCH, the physical uplink control channel PUCCH, or a radio resource request using the physical random access channel based on the radio resource allocation, and requests the physical layer control unit 105 for control processing for transmitting the selected channel.

[0220] That is, when radio resources have been allocated and the device is in a state where it can transmit data using the Physical Uplink Shared Channel (PUSCH), the encoding unit 107 obtains the transmission data corresponding to the allocated radio resources from the uplink buffer according to the instruction of the radio resource control unit 110, encodes the data, and inputs the encoded data to the modulation unit 108. Alternatively, when radio resources have not been allocated and a radio resource request based on the Physical Uplink Control Channel is possible, the encoding unit 107 encodes the control data required for transmitting the radio resource request based on the Physical Uplink Control Channel according to the instruction of the radio resource control unit 110, and inputs the encoded data to the modulation unit 108.

[0221] Alternatively, when radio resources have not been allocated and a radio resource request based on the Physical Uplink Control Channel is not possible, the encoding unit 107 instructs the transmission data control unit 106 to start a random access procedure. At this time, the encoding unit 107 generates a preamble sequence transmitted by the Physical Random Access Channel based on the random access setting information input from the transmission data control unit 106. In addition, the encoding unit 107 appropriately encodes each data according to the transmission control information and inputs the encoded data to the modulation unit 108.

[0222] The modulation unit 108 performs appropriate modulation processing based on the channel structure for transmitting each encoded data. The transmission unit 109 maps each modulated data to the frequency domain, transforms the signal in the frequency domain into a time-domain signal, amplifies the power, and transmits the signal on a carrier wave with a predetermined frequency. In addition, the transmission unit 109 adjusts the uplink transmission timing according to the transmission timing adjustment information for each cell (or each cell group, each TA group) input from the radio resource control unit 110. The transmission unit 109 may include an RF circuit. The transmission signal output from the transmission unit 109 is transmitted by the transmission antenna unit T01. The Physical Uplink Shared Channel configured with uplink control data can include, in addition to user data, for example, layer 3 messages (radio resource control messages; RRC messages).

[0223] In Figure 1 the descriptions of the other components of the terminal device 1 and the data (control information) transmission paths between components are omitted, but it is obvious that as components, there are multiple blocks with other functions required for the operation of the terminal device 1. For example, above the radio resource control unit 110, there are a NAS layer unit and an application layer unit that execute control with the core network.

[0224] In addition, the receiving antenna unit R01 or the transmitting antenna unit T01 is typically a planar multi-band antenna, but any antenna suitable for the capabilities, shape, purpose, etc. of the mobile station device of the terminal device 1 can be used. For example, it can be composed of multiple antenna units, can have directivity, or the receiving antenna unit R01 and the transmitting antenna unit T01 can be integrally formed. The receiving antenna unit R01 and the transmitting antenna unit T01 can also be composed of multiple antennas that are physically different or logically separated.

[0225] Figure 2 FIG. is a block diagram showing an example of the base station device 2 according to the first embodiment of the present invention. This base station device includes at least a receiving antenna unit R02, a receiving unit 201, a demodulating unit 202, a decoding unit 203, a received data control unit 204, a physical layer control unit 205, a transmitted data control unit 206, an encoding unit 207, a modulating unit 208, a transmitting unit 209, a transmitting antenna unit T02, a radio resource control unit 210, and a network signal transmitting / receiving unit 211. The "unit" in the figure is an element that realizes the functions and various processes of the base station device 2, expressed by terms such as part, circuit, constituting device, equipment, unit, etc.

[0226] The radio resource control unit 210 is a block that executes the various functions of the RRC (Radio Resource Control) layer for radio resource control of the base station device 2. In addition, the received data control unit 204 and the transmitted data control unit 206 are blocks that execute the various functions in the MAC (Medium Access Control; medium access control) layer, RLC (Radio Link Control; radio link control) layer, and PDCP (Packet Data Convergence Protocol; packet data convergence protocol) layer for managing the data link layer.

[0227] Moreover, the base station device 2 can be configured to include multiple receiving system blocks (receiving unit 201, demodulating unit 202, decoding unit 203) and transmitting system blocks (encoding unit 207, modulating unit 208, transmitting unit 209) to support multiple frequencies (frequency bands, frequency bandwidths) based on carrier aggregation and / or dual connectivity. In addition, it can also be configured to include multiple received data control units 204, physical layer control units 205, transmitted data control units 206, radio resource control units 210, and network signal transmitting / receiving units 211.

[0228] The radio resource control unit 210 inputs downlink data and downlink control data to the transmission data control unit 206. When there is a MAC control element to be sent to the terminal device 1, the transmission data control unit 206 inputs the MAC control element and each data (downlink data or downlink control data) to the encoding unit 207. The encoding unit 207 encodes the input MAC control element and each data, and inputs them to the modulation unit 208. The modulation unit 208 modulates the encoded signal.

[0229] In addition, the signal modulated by the modulation unit 208 is input to the transmission unit 209. The transmission unit 209 maps the input signal to the frequency domain, then transforms the signal in the frequency domain into a signal in the time domain, amplifies the power while carrying it on a carrier wave of a predetermined frequency. The transmission unit 209 may also include an RF circuit. The transmission signal output from the transmission unit 209 is transmitted by the transmission antenna unit T02. The physical downlink shared channel configured with downlink control data typically constitutes a layer 3 message (RRC message).

[0230] In addition, the received signal is received by the reception antenna unit R02 and input to the reception unit 201. The reception unit 201 transforms the signal received from the terminal device 1 into a baseband digital signal. In the case of a cell in which a plurality of different transmission timings are set for the terminal device 1, the reception unit 201 receives the signal at different timings for each cell (or each cell group, each TA group). The digital signal transformed by the reception unit 201 is input to the demodulation unit 202 for demodulation.

[0231] The signal demodulated by the demodulation unit 202 is then input to the decoding unit 203. The decoding unit 203 decodes the input signal, and inputs each decoded data (uplink data and uplink control data) to the reception data control unit 204. In addition, the MAC control element sent from the terminal device 1 together with each data is also decoded by the decoding unit 203 and input to the reception data control unit 204.

[0232] The reception data control unit 204 performs control of the physical layer control unit 205 based on the received MAC control element, buffering of each decoded data, and error correction control (HARQ) of the retransmitted data. Each data input to the reception data control unit 204 is input (forwarded) to the radio resource control unit 210.

[0233] The physical layer control information required for the control of these respective blocks is information including parameter settings required for the radio communication control of the base station device 2, which is composed of reception control information and transmission control information. The physical layer control information is set by an upper network device (MME, gateway device (SGW), OAM, etc.), system parameters, and the radio resource control unit 210 inputs it to the control unit 204 as needed.

[0234] The physical layer control unit 205 appropriately inputs the physical layer control information associated with transmission as transmission control information to each block of the encoding unit 207, modulation unit 208, and transmission unit 209, and appropriately inputs the physical layer control information associated with reception as reception control information to each block of the reception unit 201, demodulation unit 202, and decoding unit 203.

[0235] The received data control information includes control information related to the uplink of the terminal device 1 for each of the MAC layer, RLC layer, and PDCP layer of the base station device 2. In addition, the transmitted data control information includes control information related to the downlink of the terminal device 1 for each of the MAC layer, RLC layer, and PDCP layer of the base station device 2. That is, the received data control information and the transmitted data control information are set for each terminal device 1.

[0236] The network signal transmission / reception unit 211 transmits (forwards) or receives control messages or user data between base station devices 2 or between a higher-level network device (MME, SGW) and base station device 2. In Figure 2 this, the components of other base station devices 2 and the transmission paths of data (control information) between components are omitted, but it is clearly equipped with multiple blocks having other functions required for the operation of the base station device 2 as components. For example, there are a radio resource management (Radio Resource Management) unit and an application layer unit above the radio resource control unit 210.

[0237] In addition, the receiving antenna unit R02 or the transmitting antenna unit T02 is typically a planar multi-band antenna, but any antenna suitable for the transmission capabilities, shape, purpose, etc. of the base station device 2 can be used for construction. For example, it can be composed of multiple antenna units, can have directivity, or can integrate the receiving antenna unit R02 and the transmitting antenna unit T02. Furthermore, the receiving antenna unit R02 and the transmitting antenna unit T02 (which may include the receiving unit 201 and the transmitting unit 209) can be configured as a single unit (Remote Radio Head: RRH, remote radio head) independent of the base station device 2 and arranged at a position different from the base station device 2.

[0238] Figure 3 To illustrate the parameters (information elements) related to the measurement object(s) included in the measurement configuration notified (set) by the base station device 2 to the terminal device 1.

[0239] The base station device 2 can notify a list of one or more measurement objects (MeasObject-List). An associated measurement object identifier is set for each measurement object. In Figure 3 's example, two measurement objects EUTRA (MeasObjectEUTRA#1 and MeasObjectEUTRA#2) are set, and different measurement object identifiers (measObjId#1, measObjId#2) are set for each measurement object EUTRA. The base station device 2 uses the measurement object identifier to notify the terminal device 1 of the added, deleted, or changed measurement objects. And, in Figure 3 , the measurement objects included in the list are not limited to the measurement object EUTRA, and may also include measurement objects corresponding to other radio access technologies (for example, the measurement object UTRA (measObject UTRA) and the measurement object GERAN (measObjectGERAN)).

[0240] The measurement object EUTRA may further include a carrier frequency (carrierFreq), an RSSI measurement bandwidth (RSSI-MeasBandwidth), an allowed measurement bandwidth (AllowedMeasBandwidth), an offset frequency (offsetFreq), information related to a neighbor cell list, information related to a blacklist, a wideband RSRQ measurement (widebandRSRQ-Meas), a discovery signal measurement setting (measDS-Config), etc.

[0241] The carrier frequency (carrierFreq) refers to a parameter used to uniquely represent a frequency band and a frequency. Specifically, it is an integer value of one of the variables notified for a predetermined calculation formula. For example, when indicating the frequency band of EUTRA, any value from 0 to 65535 is set. When specifying an unlicensed frequency band as the carrier frequency (carrierFreq), a new value in a different range from the prior art may be set, or a different calculation formula may be used.

[0242] The RSSI measurement bandwidth refers to a new parameter related to RSSI measurement, which indicates the maximum permitted measurement bandwidth applied during RSSI measurement in terms of the number of resource blocks. Moreover, it is preferable to set the newly added parameter in an additional field (extended field) in the RRC message. As the RSSI measurement bandwidth, the base station device 2 designates (notifies) any value of the number of resource blocks, such as 6, 15, 25, 50, 75, 100, to the terminal device 1. When performing RSSI measurement in the EUTRA measurement object associated with the RSSI measurement bandwidth, the terminal device 1 can use the designated number of resource blocks as the maximum permitted measurement bandwidth. In other words, when performing RSSI measurement on the frequency related to the EUTRA measurement object including the RSSI measurement bandwidth, the terminal device 1 can use the number of resource blocks designated by the RSSI measurement bandwidth as the upper limit of the measurement bandwidth to perform RSSI measurement.

[0243] Alternatively, the RSSI measurement bandwidth refers to the minimum required measurement bandwidth applied during RSSI measurement in terms of the number of resource blocks. When performing RSSI measurement in the EUTRA measurement object related to the RSSI measurement bandwidth, the terminal device 1 can use the designated number of resource blocks as the minimum required measurement bandwidth. In other words, when performing RSSI measurement on the frequency related to the EUTRA measurement object including the RSSI measurement bandwidth, the terminal device 1 can use the number of resource blocks designated by the RSSI measurement bandwidth as the lower limit of the measurement bandwidth to perform RSSI measurement.

[0244] Moreover, when the wideband RSRQ measurement (widebandRSRQ-Meas) regarding RSRQ measurement is notified as TRUE, the terminal device 1 can use the measurement bandwidth applied to the RSRQ measurement (i.e., a measurement bandwidth of six resource blocks or more) as the measurement bandwidth during RSSI measurement.

[0245] The discovery signal measurement setting (measDS-Config) may further include information indicating the period and time offset of the discovery signal transmission opportunity (DMTC occasion) (DMTC period offset (dmtcPeriodOffset)), information indicating the length of the discovery signal transmission opportunity (discovery signal period (ds-OccasionDuration)), CSI-RS resource measurement setting (MeasCSI-RS-Config), etc. Also, multiple CSI-RS resource measurement settings (MeasCSI-RS-Config#1 to MeasCSI-RS-config#n) may be included in the discovery signal measurement setting. In this case, the base station device may include an identifier for identifying the multiple CSI-RS resource measurement settings (measurement CSI-RS resource identifier (MeasCSI-RS-Id)).

[0246] In addition, it is found that the signal measurement setting may include a measurement RSSI setting (MeasRSSI-Config). The above-mentioned RSSI measurement bandwidth may be included in the measurement RSSI setting. Also, other parameters may be included in the discovery signal measurement setting. The discovery signal measurement setting (measDS-Config) may be a second discovery signal measurement setting (measDS-Config2) corresponding to different discovery signals for the unlicensed band.

[0247] Figure 4 It is a diagram for explaining parameters (information elements) related to reporting configurations included in the measurement configuration notified (set) from the base station device 2 to the terminal device 1.

[0248] The base station device 2 may notify a reporting configuration list (ReportingCconfig-List) including one or more. A related reporting configuration identifier (reportConfigId) is set in each reporting configuration. In Figure 4 In the example, two EUTRA reporting configurations (reportConfigEUTRA#1, reportConfigEUTRA#2) are set, and different reporting configuration identifiers (reportConfigId#1, reportConfigId#2) are set in each EUTRA reporting configuration. The base station device 2 notifies the terminal device 1 of the added, deleted, or changed reporting configuration using the reporting configuration identifier. Also, in Figure 4 the reporting configurations included in the list are not limited to EUTRA reporting configurations, and may also be reporting configurations corresponding to other radio access technologies (e.g., Inter-RAT reporting configuration (reportConfigInterRAT)).

[0249] The EUTRA reporting configuration may further include a trigger type (triggerType), a reporting interval (reportInterval), a reporting amount (reportAmount), a reporting RSSI measurement (reportRSSI-Meas), multiple RSSI thresholds (RSSIthreshold), a measurement RSSI interval (RSSI-duration), etc. Also, other parameters may be included in the EUTRA reporting configuration. For example, when the trigger type (triggerType) is an event, parameters corresponding to each event (such as the above-mentioned hysteresis parameter Hys, etc.) may be included.

[0250] The trigger type (triggerType) indicates whether the trigger of the report defined by the reporting configured EUTRA is an event report type (event) period or a periodic report type (periodical). For the event report type, when the trigger criteria defined by Events A1 to A6 and Events C1 to C2 are met, the measurement report process is executed. On the other hand, for the periodic report type, the measurement results are reported periodically after a certain measurement time. The report interval (reportInterval) and the report amount (reportAmount) are parameters for the reports of the periodic report type.

[0251] The time indicated in the report interval is applied as a periodic reporting timer to each measurement identifier. When the periodic reporting timer expires, the terminal device 1 increments the number of reports sent (numberOfReportsSent), which is an internal variable. The terminal 1 starts the periodic reporting timer when the number of reports sent is less than the report amount, and deletes (removes) the associated measurement identifier when the number of reports sent has exceeded the report amount. When the periodic reporting timer expires, the terminal device 1 determines that the measurement report has been triggered (the measurement report process has been triggered).

[0252] The report RSSI measurement (reportRSSI-Meas) is a parameter indicating whether to periodically report the RSSI of the frequency of the relevant measurement object. In other words, the report RSSI measurement is a parameter indicating whether a periodic RSSI measurement report is performed in the terminal device 1. The base station device 2 can also set the report RSSI measurement only when the discovery signal measurement setting (measDS-Config) is included in the associated measurement object. When specified by a boolean value, the base station device 2 can set (notify) the report RSSI measurement value to true (TRUE) only when the discovery signal measurement setting (measDS-Config) is included in the associated measurement object (the measurement object of the measurement object identifier linked to the report setting identifier).

[0253] The base station device 2 can always specify the trigger type for setting the RSSI measurement report as the periodical type. The base station device 2 can also always specify the number of reports (reportAmount) for setting the RSSI measurement report as one. If there are RSSI results (rssiResults) that can be reported when some measurement reports are triggered, the terminal device can include the RSSI results as measurement results in the measurement report message and report them. Alternatively, when a periodical or event-based measurement report for RSSI is triggered, if there are RSSI results that can be reported, the terminal device can include the RSSI results as measurement results in the measurement report message and report them. At this time, when the RSSI result is the first reportable result, the terminal device 1 can set the value of the number of reports sent (numberOfReportsSent), which is an internal variable, to 0 (zero).

[0254] The RSSI threshold is a parameter required for, for example, RSSI reporting to hide terminal problems. Also, the RSSI threshold can be an explicit value (e.g., dBm), or a value of an index mapped to a predefined threshold, or a value of a variable specifying a formula introduced for calculating the threshold. Multiple RSSI thresholds can be set. The terminal device 1 compares the measured RSSI with the threshold.

[0255] For example, when notified of threshold 1 and threshold 2 (threshold 1 < threshold 2) from the base station device 2, the terminal device 1 can calculate the number of times the RSSI is below threshold 1, the number of times the RSSI is above threshold 1 and below threshold 2, and the number of times the RSSI is above threshold 2, respectively. Alternatively, the terminal device 1 can represent the time when the RSSI is below threshold 1, the time when the RSSI is above threshold 1 and below threshold 2, and the time when the RSSI is above threshold 2 as ratios (percentages), respectively.

[0256] The measurement RSSI interval (RSSI-duration) is another parameter required for RSSI reporting, for example, to address the hidden terminal problem, and represents the length of the interval for performing RSSI measurements. The interval length can represent continuous time or the sum of discontinuous time. Also, the measurement RSSI interval can be an explicit value such as a frame, subframe, ms (millisecond), etc., can use the number of specified discovery signal transmission opportunities (DMTC Occasion), can be a numerical value representing the number of RSSI measurements, can be a value representing a subframe interval within a discovery signal transmission opportunity (DMTC Occasion), or can be a value representing the subframes for which RSSI measurements are to be made in bitmap format. The measurement RSSI interval can also be specified as an RRC timer. When the measurement identifier and the reporting setting are associated, the terminal device 1 can start the RRC timer representing the measurement RSSI interval. The RRC timer is, for example, timer T322.

[0257] That is, when increasing (changing) the measurement identifier, for each measurement identifier, if the trigger type of the associated reporting setting is the periodic reporting type and the associated reporting setting includes RSSI measurement, the terminal device 1 can start the RRC timer indicated by the measurement RSSI part.

[0258] The RSSI threshold (RSSI threshold) and report RSSI measurement (reportRSSI-Meas) can be notified (set) as a set of parameters listed in the reporting setting. For example, the base station device 2 can add, change, or delete a set of parameters (including the RSSI threshold and report RSSI measurement) for the terminal device 1 by notifying (setting) the measurement RSSI identifier (reportRSSI-Id) associated with each set of parameters.

[0259] When there is a change in the correspondence of the held measurement identifiers or when the held measurement identifiers are removed, the terminal device 1 can stop the running RRC timer. A change in the correspondence means, for example, setting different measurement setting identifiers or different reporting identifiers for the same measurement identifier (i.e., replacement).

[0260] The measurement RSSI interval can be specified to clearly measure the start timing (e.g., the system frame and / or sub-frame at which measurement starts). Alternatively, a predefined value can be set as the RRC timer without explicitly indicating the measurement RSSI interval. When the measurement identifier and the reporting setting are associated, the terminal device 1 can start the associated RRC timer. In addition, the measurement RSSI interval can be notified through system information. In addition, it can be set to switch multiple predefined values based on RRC parameters, or a specified value can be set based on the relevant measurement object.

[0261] Hereinafter, an RSSI measurement method using Figure 3 and Figure 4 the parameters shown will be described. Figure 3 The measurement object in Figure 4 and the reporting setting in Figure 3 are associated one-to-one through the measurement identifier (measId). In other words, the base station device 2 notifies (sets) a measurement identifier (measId) to the terminal device 1, and this measurement identifier is used to associate (link) Figure 4 one measurement object identifier (measObjectId) in

[0262] the terminal device 1 is at least in the RRC connected state (RRC_CONNECTED, communication in progress state), and one or more unlicensed band frequencies are set as the measurement object (measObject). In addition to the primary cell, the base station device 2 can also set one or more unlicensed band frequencies of secondary cells (LAA cells) to the terminal device 1. In other words, the terminal device 1 measures the unlicensed band frequency as the serving frequency (intra-frequency) or the non-serving frequency (inter-frequency).

[0263] In the terminal device 1, for each measurement identifier (measId), a discovery signal measurement setting (measDS-Config) is set in the associated measurement object, and when the associated measurement object contains information (measurement parameters) related to RSSI measurement, RSSI measurement can be performed. In addition, in the terminal device 1, when a discovery signal measurement setting (measDS-Config) is set for each measurement identifier (measId) in the associated measurement object and the associated reporting setting contains information (measurement parameters) related to RSSI measurement (or when a measurement event is set), the discovery signal measurement timing configuration can be applied to the frequency of the associated measurement object to perform RSSI measurement.

[0264] For each measurement identifier (measId), when the associated measurement object is a measurement object EUTRA and the associated measurement object contains information related to RSSI measurement (measurement parameters), the terminal device 1 can determine (estimate) the frequency of the associated measurement object as a frequency suitable for RSSI measurement (RSSI reporting). That is, the terminal device 1 can determine the frequency of the associated measurement object as the frequency to be the object of RSSI measurement (RSSI reporting) or the frequency required for RSSI measurement (RSSI reporting). For example, for each measurement identifier (measId), when an RSSI measurement bandwidth (RSSI-MeasBandwidth) is set in the associated RSSI measurement object, the terminal device 1 can determine the frequency of the associated measurement object as a suitable frequency (applicable frequency) for performing RSSI measurement. The suitable frequency for performing RSSI measurement (RSSI reporting) can also be referred to as a suitable resource (applicable resource) for performing RSSI measurement (RSSI reporting).

[0265] In addition, for example, for each measurement identifier (measId), when a measurement RSSI setting (MeasRSSI-Config) is set in the discovery signal measurement setting (measDS-Config) of the associated measurement object, the terminal device 1 can determine the frequency of the associated measurement object as a suitable frequency (applicable frequency) for performing RSSI measurement. In addition, for example, for each measurement identifier (measId), when the frequency band corresponding to the carrier frequency (carrierFreq) indicated by the associated measurement object is an unlicensed frequency band, the terminal device 1 can determine the frequency of the associated measurement object as a suitable frequency (applicable frequency) for performing RSSI measurement.

[0266] In addition, for each measurement identifier (measId), when the relevant measurement object is the measurement object EUTRA and the associated reporting setting includes information (measurement parameters) related to RSSI measurement, the terminal device 1 may determine the frequency of the measurement object associated with the associated reporting setting as the applicable frequency for performing RSSI measurement. For example, for each measurement identifier (measId), when the associated reporting setting is set with the reported RSSI measurement (reportRSSI-Meas), the terminal device 1 may determine the frequency of the associated measurement object as the applicable frequency for performing RSSI measurement. In addition, for example, for each measurement identifier (measId), when the associated reporting setting is set with a measurement event related to RSSI, the terminal device 1 may determine the frequency of the associated measurement object as the applicable frequency for performing RSSI measurement.

[0267] In addition, in addition to the above, when a discovery signal measurement setting (measDS-config) is set in the associated measurement object, the terminal device 1 may determine the frequency of the associated measurement object as the applicable frequency for performing RSSI measurement. And the applicable frequency for performing RSSI measurement may be referred to as the frequency that is the object of the measurement report (measurement report trigger), and may also be referred to as the frequency that is the reporting object in the measurement report message. And the measurement object is not limited to the measurement object EUTRA, but may be an inter-RAT measurement object, or a measurement object added for LAA (for example, the measurement object LAA).

[0268] When the applicable frequency for performing RSSI measurement is the frequency of the secondary cell, if the associated secondary cell is in the active state, the terminal device 1 does not apply the discovery signal measurement timing configuration included in the associated measurement object and performs RSRP and RSRP measurement of the CRS. If the associated secondary cell is in the deactivated state, the terminal device 1 applies the discovery signal measurement timing configuration included in the associated measurement object and performs RSRP and RSRP measurement of the CRS during the discovery signal period. And when the terminal device 1 supports the measurement of the discovery signal based on the CRS and the associated secondary cell is deactivated, the terminal device 1 may apply the discovery signal measurement timing configuration when measuring the RSRP and RSRQ of the CRS of the secondary cell (performing CRS measurement).

[0269] In addition, when the terminal device 1 supports the measurement of the discovery signal based on CSI-RS, the terminal device 1 can also apply the discovery signal measurement timing configuration when measuring the RSRP and RSRQ of the CSI-RS resource. In addition, when the frequency suitable for RSSI measurement is the frequency of the secondary cell, regardless of the state (active state, deactivated state) of the associated secondary cell, the terminal device 1 can always apply the discovery signal measurement timing configuration included in the associated measurement object and measure the RSSI during the discovery signal period.

[0270] In addition, when the frequency suitable for RSSI measurement is a non-serving frequency (i.e., inter-frequency), the terminal device 1 can apply the discovery signal measurement timing configuration included in the associated measurement object and measure the RSSI during the discovery signal period. And, if the terminal device 1 supports the measurement of the discovery signal based on CRS and the associated frequency is a non-serving frequency, the terminal device 1 can apply the discovery signal measurement timing configuration when measuring the RSRP and RSRQ of the CRS of the neighboring cell (performing CRS measurement).

[0271] Moreover, in the above process, when the discovery signal measurement timing configuration is not included in the associated measurement object, the terminal device 1 can not perform the process of applying the discovery signal measurement timing configuration.

[0272] The terminal device 1 can measure the RSSI in units of OFDM symbols. The terminal device 1 can measure the RSSI only with the OFDM symbols including CRS or the OFDM symbols detecting CRS. The terminal device 1 can also measure the RSSI with all the OFDM symbols. The terminal device 1 can use the discovery signal period (ds-Occasion Duration) as the measurement subframe and average the RSSI measured during the discovery signal period (ds-Occasion Duration) as the measurement result. The terminal device 1 can measure the RSSI with all or part of the OFDM symbols during the discovery signal period (ds-Occasion Duration) and average the measured RSSI as the measurement result. In addition, the terminal device 1 can also measure the RSSI during the discovery signal period (ds-Occasion Duration) periodically at a specified time interval and average the measured RSSI as the measurement result. That is, the terminal device 1 can divide the discovery signal period (ds-Occasion Duration) at a specified time (e.g., in units of a certain specified subframe), measure the RSSI in all or part of the OFDM symbols within the divided time, and average the measured RSSI as the measurement result.

[0273] The terminal device 1 can use the discovery signal transmission opportunity (DMTC occasion) as a measurement subframe, and average the measured RSSI in the discovery signal transmission opportunity (DMTC occasion) as the measurement result. The terminal device 1 can measure the RSSI using all or part of the OFDM symbols in the discovery signal transmission opportunity (DMTC occasion), and average the measured RSSI as the measurement result. In addition, the terminal device 1 can also periodically measure the RSSI in the discovery signal transmission opportunity (DMTC occasion) at a specified time interval, and average the measured RSSI as the measurement result. That is, the terminal device 1 can divide the discovery signal transmission opportunity (DMTC occasion) at a specified time (for example, a specified subframe unit), measure the RSSI in all or part of the OFDM symbols within the divided time, and average the measured RSSI as the measurement result.

[0274] In addition, the terminal device 1 can, during the discovery signal period (ds-OccasionDuration) or the discovery signal transmission opportunity (DMTC occasion), based on the information specified by the base station device 2, measure the RSSI using only a specific OFDM symbol, or measure the RSSI using the CSI-RS resources specified in the CSI-RS resource measurement setting (MeasCSI-RS-Config), or measure the RSSI using only a specific subframe. In addition, the terminal device 1 does not have to measure the RSSI at the frequency of the secondary cell in the active state.

[0275] The terminal device 1 sets the RSSI result in the measurement result (measResults) for the measurement identifier associated with the measurement report triggered based on the report setting, and includes the measurement result in the measurement report message and sends it to the base station device 2. More specifically, when there is at least one applicable frequency for RSSI measurement for reporting for the measurement identifier associated with the triggered measurement report, before reaching the specified maximum number (maxReportFrequency), the RSSI results of multiple applicable frequencies can be included in the measurement report message. The multiple applicable frequencies can be multiple frequencies associated with the measurement identifier. When including the measurement results of multiple frequencies, they are included in the order of the best RSSI (i.e., in descending order). For example, in the case where the trigger type is the periodic report type, for the new measurement results that become available (reportable) after the latest periodic report, the RSSI results of the applicable frequency are included in at least one RSSI measurement. The RSSI results (of the applicable frequency) obtained from the RSSI measurement can be reported in different forms based on the report setting. If the RSSI result is based on a certain specific setting, the identifier corresponding to the setting is reported simultaneously. For example, if the RSSI measurement is based on the measurement setting of the CSI-RS resource, the terminal device 1 can include the measured CSI-RS resource identifier (Meas CSI-RS-ID) together with the RSSI result in the measurement result.

[0276] The terminal device 1 can include, as the RSSI result, the value obtained by averaging the measured value of RSSI (layer 3 filtering) in the measurement result. By averaging the measurement results of RSSI, the value of RSSI that eliminates the influence of temporary RSSI fluctuations can be reported. In addition, even when the RSRP or RSRQ cannot be measured due to the busy state in the unlicensed band, the terminal device 1 can report the received strength of the signal in the unlicensed bandwidth by measuring RSSI.

[0277] In addition, the terminal device 1 can include the comparison result of each RSSI measurement value with the RSSI threshold in the measurement result for reporting. For example, the terminal device 1 can compare the measured RSSI measurement results with the notified RSSI threshold respectively, aggregate the values corresponding to the data (frequencies) in the histogram or frequency distribution table, and include the aggregation result in the measurement result for reporting. That is, the RSSI threshold defines the number of bins (bin width) in the histogram. In other words, the RSSI threshold defines the number of classes in the frequency distribution table. For example, when two values are notified as the RSSI threshold, if it is a histogram, the number of bins is 3, and if it is a frequency distribution table, the number of classes is 3.

[0278] In addition, the base station device 2 can explicitly include the histogram report RSSI measurement in the reporting setting as a measurement parameter indicating that the measured RSSI is reported in the form of a histogram (or frequency distribution table). It can be configured such that when the histogram report RSSI measurement is set (notified) (for example, when the value is set to "TRUE"), the RSSI threshold and the measured RSSI interval are valid. Or, it can be configured such that only when the histogram report RSSI measurement is set, the RSSI threshold and the measured RSSI interval are set (notified).

[0279] It can also be configured such that when the histogram report RSSI measurement is set (notified), the terminal device 1 does not perform layer 3 filtering on the RSSI result reported in the form of a histogram. For example, when the histogram report RSSI measurement is set (notified), the terminal device 1 can regard the layer 3 filtering coefficient as 0 (zero). That is, the layer 3 filtering coefficient can be ignored. Or, in the case where the histogram report RSSI measurement is set, the terminal device 1 does not need to apply the layer 3 filtering coefficient to the RSSI result.

[0280] The terminal device 1 can perform a conventional RSSI report (first RSSI report) to which layer 3 filtering can be applied when no measurement report in the form of a histogram (frequency distribution form) is requested (set), and perform a report in the form of a histogram (frequency distribution form) (second RSSI report) when a measurement report in the form of a histogram (frequency distribution form) is requested (set). When performing the second RSSI report, the terminal device 1 can include the second RSSI report and the first RSSI report in the measurement report message for reporting.

[0281] In the case of performing a regular RSSI report (first RSSI report), when the measured RSSI becomes reportable among the frequencies of the associated measurement objects, the terminal device 1 can determine that the measurement report of the associated measurement identifier has been triggered. Alternatively, in the case of performing a regular RSSI report (first RSSI report), when the measurement result of the primary cell is valid and the best cell (strongest cell) is determined among the neighboring cells detected at the frequencies of the associated measurement objects, the terminal device 1 can determine that the measurement report of the associated measurement identifier has been triggered.

[0282] In addition, in the case of performing an RSSI report in histogram form (second RSSI report), when the time indicated by the measurement RSSI interval has elapsed among the frequencies of the associated measurement objects, the terminal device 1 can determine that the measurement report of the associated measurement identifier has been triggered. In addition, in the case of performing an RSSI report in histogram form (second RSSI report), when the RRC timer indicated by the measurement RSSI interval has expired among the frequencies of the associated measurement objects, the terminal device 1 can determine that the measurement report of the associated measurement identifier has been triggered.

[0283] More specifically, the report in histogram form (frequency distribution form) is described. For example, as Figure 5 shown, an example of the case where the RSSI result is obtained in each measurement and the threshold values 1 and 2 are notified is described. Figure 5 In the example of, the number of RSSI measurement values less than the threshold value 1 is 2, the number of RSSI measurement values that are equal to or greater than the threshold value 1 and less than the threshold value 2 is 3, and the number of RSSI measurement values that are equal to or greater than the threshold value 2 is 1. At this time, when the terminal device 1 is requested (set) to perform a measurement report in histogram form (frequency distribution form), as a measurement result, the following information elements (fields) are included in the measurement report message and sent to the base station device 2.

[0284] {bin1, bin2, bin3} = {2, 3, 1}

[0285] When the terminal device 1 is requested (set) to perform a histogram (frequency distribution form) measurement report, when the actual measurement time (or the number of measurements) is less than the total time for performing RSSI measurement (measurement RSSI interval), the terminal device 1 may not perform an RSSI report in histogram form. That is, before the time (or the number of measurements) indicated by the measurement RSSI interval is satisfied, the terminal device 1 regards that there is no applicable frequency for performing RSSI measurement, or there is no reportable RSSI result.

[0286] In addition, when the terminal device 1 measures RSSI in the form of a histogram, if it cannot measure other frequencies simultaneously, it may not perform the measurement of other frequencies (inter-frequency measurement). In other words, when the terminal device 1 measures RSSI in the form of a histogram and in other cases, different measurement requirements can be applied. The terminal device 1 can implicitly relax the measurement requirements for the frequencies that need to measure RSSI in the form of a histogram, or can relax the measurement requirements only for the frequencies with parameters (ReducedMeasPerformanc) that are set to clearly indicate that the measurement requirements can be relaxed. For example, the terminal device 1 can only relax (extend) the time for measuring RSSI in the form of a histogram for the measurement requirements. Or, the terminal device 1 can preferentially measure the frequencies that need to measure RSSI in the form of a histogram and can relax the measurement requirements for other frequencies.

[0287] Figure 6 It is another diagram for explaining another example of the parameters related to the reporting setting according to the embodiment of the present invention. The base station device 2 can also send (notify) to the terminal device 1 by including the report RSSI frequency list (reportRSSI-FreqList) in the reporting setting.

[0288] The report RSSI frequency list (reportRSSI-Freqlist) can include one or more (1 to m (m is an integer)) carrier frequencies (carrierFreq). When the measurement object is the measurement object EUTRA and the measurement parameters related to the report RSSI frequency list are included in the reporting setting, the terminal device 1 can determine the carrier frequencies indicated by the report RSSI frequency list as the applicable frequencies for performing RSSI measurement. That is, the terminal device 1 determines each carrier frequency (carrierFreq) included in the report RSSI frequency list (reportRSSI-Freqlist) of the reporting setting as the applicable frequency for performing RSSI measurement.

[0289] When the terminal device 1 is configured with a reporting RSSI frequency list, it can report the RSSI of the frequencies indicated by the reporting RSSI frequency list when triggered by a certain measurement report. Alternatively, when the terminal device 1 is configured with a reporting RSSI frequency list, it can report the RSSI of the frequencies indicated by the reporting RSSI frequency list when triggered by a measurement report related to RSSI. At this time, the terminal device 1 can report the reported RSSI in descending order (i.e., in descending order of the dBm of the RSSI). The terminal device 1 can limit the RSSI report to a specific number (e.g., three frequencies) among the measured RSSIs. The number (maxReportFrequencies) of RSSIs (frequencies) to be reported can be notified as another parameter set for reporting in the RRC message from the base station device 2.

[0290] In addition, when the frequency indicated by the reporting RSSI frequency list is the frequency of a secondary cell, if the associated secondary cell is in the active state, the terminal device does not measure the RSRP and RSRQ of the CRS by applying the discovery signal measurement timing configuration included in the associated measurement object. If the associated secondary cell is in the deactivated state, the terminal device 1 applies the discovery signal measurement timing configuration included in the associated measurement object and measures the RSRP and RSRQ of the CRS during the discovery signal period. Also, when the terminal device 1 supports the measurement of the discovery signal based on the CRS and the associated secondary cell is deactivated, the terminal device 1 can apply the discovery signal measurement timing configuration when measuring the RSRP and RSRQ of the CRS (CRS measurement) of the secondary cell.

[0291] In addition, when the frequency indicated by the reporting RSSI frequency list is the frequency of a secondary cell, the terminal device 1 can always apply the discovery signal measurement timing configuration included in the associated measurement object regardless of the state (active state, deactivated state) of the associated secondary cell and measure the RSSI during the discovery signal period. In addition, when the frequency indicated by the reporting RSSI frequency list is a non-serving frequency, the terminal device 1 can apply the discovery signal measurement timing configuration included in the associated measurement object and measure the RSSI during the discovery signal period. Also, when the discovery signal measurement timing configuration is not included in the associated measurement object, the terminal device 1 does not need to perform the above process.

[0292] Regarding the frequency for measuring RSSI and the measurement time (measurement interval) of the RSSI measurement at that frequency, the terminal device 1 of the present embodiment can appropriately determine (ascertain, estimate) based on the measurement parameters related to RSSI measurement notified (set) by the base station device 2 through an RRC message. In addition, the terminal device can measure the RSSI of one or more frequencies based on the measurement parameters related to RSSI measurement, and include the measurement results thereof in a measurement report message for transmission. Thus, even when it is not possible to measure RSRP or RSRQ due to a busy state, the terminal device 1 can effectively perform the RSSI measurement of one or more frequencies based on the measurement parameters related to RSSI indicated by the measurement object or report setting.

[0293] The base station device 2 of the present embodiment can notify the terminal device 1 of the measurement parameters related to RSSI measurement through an RRC message. The measurement parameters related to RSSI measurement are for uniquely determining (ascertaining, estimating) the frequency for measuring RSSI and the measurement time (measurement interval) of the RSSI measurement at that frequency. In addition, the base station device 2 can receive a measurement report message containing appropriate RSSI measurement results from the terminal device 1. In addition, even when it is not possible to measure RSRP or RSRQ due to a busy state, the base station device 2 can cause the terminal device 1 to determine the frequency required for RSSI reporting and perform an RSSI measurement at that frequency by sending the measurement parameters related to RSSI indicated by the measurement object or report setting to the terminal device 1. Therefore, an effective measurement method can be provided to the terminal device 1.

[0294] <Second Embodiment>

[0295] The second embodiment of the present invention will be described below.

[0296] In the first embodiment, an example is shown in which, in order to include multiple RSSI reports in a measurement report, a report RSSI frequency list (reportRSSI-FreqList) is included in the report setting. However, in EUTRA, considering the setting method in which one measurement object corresponds to one frequency, it is preferably extended so that one measurement identifier (measId) can handle multiple frequencies (i.e., measurement objects). An example of such an extension method will be described below. The configurations of the terminal device 1 and the base station device 2 used in the present embodiment can be the same as those of Figure 1 and Figure 2 respectively, and their descriptions are omitted.

[0297] Figure 7 One report configuration identifier (reportConfigId#1) and multiple measurement object identifiers (measObjectId#1 #n) Linked by a measurement identifier (MeasID#1). The correspondence (link) between the reporting setting and the measurement object is notified (set) individually by the base station device 2.

[0298] If the correspondence between the identifiers shown in Figure 7 has been obtained, when a certain measurement object identifier (e.g., measObjectId#1) is deleted, if there are other measurement object identifiers (measObjectId#2) connected to the associated measurement identifier (e.g., measId#1), the terminal device 1 does not have to delete (remove) the associated measurement identifier (measId#1).

[0299] At this time, for each measurement identifier (measId), when each associated measurement object is a measurement object EUTRA and the associated reporting setting includes parameters related to RSSI measurement, the terminal device 1 can determine the frequency of one or more measurement objects associated with the associated reporting setting as the applicable frequency (applicable set of frequencies) for performing RSSI measurement.

[0300] For example, for each measurement identifier (MeasID), if report RSSI measurement (reportRSSI-Meas) is set in the associated reporting setting, the terminal device 1 can determine the frequency of one or more associated measurement objects as the applicable frequency (applicable set of frequencies) for performing RSSI measurement. In addition, for example, for each measurement identifier (MeasID), if a measurement event related to RSSI is set in the associated measurement report setting, the terminal device 1 can determine the frequency of one or more associated measurement objects as the applicable frequency (applicable set of frequencies) for performing RSSI measurement.

[0301] Figure 8 Shows an example of the measurement setting when adding a measurement object list identifier (measObjectList-Id) as a new parameter. The measurement object list identifier (measObjectList-Id) may include one or more measurement object identifiers ( Figure 8 measObjectId#1 to #n) in the example). Figure 8It shows that a report setting identifier (reportConfigId#1) and a measurement object list identifier (measObjectList-ID#1) are linked by a measurement identifier (MeasID#1). The correspondence (link) between the report setting and the measurement object list is notified (set) separately by the base station device 2.

[0302] At this time, for each measurement identifier (MeasID), when the measurement objects included in the associated measurement object list are measurement object EUTRA and the associated report setting includes measurement parameters related to RSSI measurement, the terminal device 1 can determine that the frequencies of one or more measurement objects included in the measurement object list associated with the associated report setting are suitable frequencies (applicable frequency (applicable set of frequencies)) for performing RSSI measurement.

[0303] For example, for each measurement identifier (MeasID), if the associated report setting is set to report RSSI measurement (reportRSSI-Meas), the terminal device 1 can determine that the frequencies of one or more measurement objects included in the associated measurement object list are frequencies (applicable frequency (applicable set of frequencies)) suitable for RSSI measurement. In addition, for example, for each measurement identifier (MeasID), if a measurement event is set in the associated RSSI report setting, the terminal device 1 can determine that the frequencies of one or more measurement objects included in the associated measurement object list are suitable frequencies (applicable frequency (applicable set of frequencies)) for performing RSSI measurement.

[0304] Figure 9 It shows an example of a measurement object in which the measurement object identifier (measObjectId) indicating other measurement objects is extended to be included. One or more measurement object identifiers (MeasObjectId#1 to #n in the example) can be included in the measurement object. A report setting and a measurement object are linked by a measurement identifier (Measurement #1). The correspondence (link) between the report setting and the EUTRA band of the measurement object is notified (set) separately by the base station device 2. Figure 9 The correspondence (link) between the report setting and the EUTRA band of the measurement object is notified (set) separately by the base station device 2.

[0305] At this time, for each measurement identifier (MeasID), when the measurement object included in the associated measurement object list is the measurement object EUTRA and the associated reporting setting includes measurement parameters related to RSSI measurement, the terminal device 1 may determine the frequency of the associated measurement object and the frequency of one or more measurement objects included in the measurement object list related to the associated reporting setting as an applicable frequency (applicable set of frequencies) for performing RSSI measurement.

[0306] For example, for each measurement identifier (MeasID), when report RSSI measurement (reportRSSI-Meas) is set in the associated reporting setting, the terminal device 1 may determine the frequency of the associated measurement object and the frequency of the measurement object associated with one or more measurement object identifiers included in the associated measurement object as an applicable frequency (applicable set of frequencies) for performing RSSI measurement. Further, for example, for each measurement identifier (MeasID), when a measurement event is set in the associated reporting setting, the terminal device may determine the frequency of the associated measurement object and the frequency of the measurement object associated with one or more measurement object identifiers included in the associated measurement object as an applicable frequency (applicable set of frequencies) for performing RSSI measurement.

[0307] Figure 10 An example of a measurement object is shown in which the measurement object EUTRA band (MeasObjectEUTRA-Band), which means the EUTRA band (frequency bandwidth) as a measurement object, is added as a new parameter. The measurement object EUTRA band (MeasObjectEUTRA-Band) may include one or more measurement objects EUTRA ( Figure 10 in the example, MeasObjectEUTRA#3 to #n). One reporting setting and one measurement object EUTRA band are linked by one measurement identifier (measId #1). The correspondence (link) between the reporting setting and the EUTRA band of the measurement object is separately notified (set) by the base station device 2.

[0308] At this time, for each measurement identifier (MeasID), when the measurement object included in the associated measurement object EUTRA band is the measurement object EUTRA and the measurement parameters related to the RSSI measurement are included in the associated reporting setting, the terminal device 1 can determine the frequency of one or more measurement objects included in the associated measurement object EUTRA band related to the reporting setting as the applicable frequency (applicable set of frequencies) for performing the RSSI measurement.

[0309] For example, for each measurement identifier (measId), when the reporting setting associated therewith is set to report the RSSI measurement (reportRSSI-Meas), the terminal device 1 can determine the frequency of one or more measurement objects included in the measurement object EUTRA band as the applicable frequency (applicable set of frequencies) for performing the RSSI measurement. Further, for example, for each measurement identifier (measId), when the measurement event related to the RSSI is set in the associated reporting setting, the terminal device 1 can determine the frequency of one or more measurement objects included in the measurement object EUTRA band as the applicable frequency (applicable set of frequencies) for performing the RSSI measurement.

[0310] The terminal device 1 of the present embodiment can appropriately determine (decide, estimate) one or more applicable frequencies for performing the RSSI measurement based on the measurement parameters related to the RSSI measurement notified (set) by the base station device 2 through the RRC message. Further, the terminal device 1 can measure the RSSI of one or more frequencies for one measurement identifier and include the measurement result in the measurement report message for transmission. Thus, even when it is not possible to measure the RSRP or RSRQ due to being busy, the terminal device 1 can effectively perform the RSSI measurement of one or more frequencies based on the measurement parameters related to the RSSI indicated by the measurement object or the reporting setting.

[0311] The base station device 2 of this embodiment can notify the terminal device 1 of measurement parameters related to RSSI measurement through an RRC message. The measurement parameters related to RSSI measurement are used to uniquely determine (ascertain, estimate) one or more suitable frequencies for performing RSSI measurement. In addition, the base station device 2 can receive a measurement report message containing RSSI measurement results for one or more frequencies measured for one measurement identifier. Further, even when it is not possible to measure RSRP or RSRQ due to a busy state, the base station device 2 can cause the terminal device 1 to determine the frequencies required for RSSI reporting and perform RSSI measurement at those frequencies by sending the measurement parameters related to RSSI indicated by the measurement object or report setting to the terminal device 1. Therefore, an effective measurement method can be provided to the terminal device 1.

[0312] Moreover, the embodiments described above are merely examples, and can be implemented by using various modification examples and substitution examples. For example, the transmission mode used can be an FDD (Frequency Division Duplex) mode, a TDD (Time Division Duplex) mode, or a communication system that uses these two transmission modes for each frequency. In addition, the names of various parameters and various operations shown in the embodiments are names used for convenience of explanation. Even if the actual names used are different from the names of the embodiments of the present invention, this does not affect the gist of the invention claimed in the embodiments of the present invention.

[0313] In addition, the "connection" used in each embodiment is not limited to a configuration in which a certain device and another device are directly connected by a physical line, and also includes a logical connection configuration, and a configuration wirelessly connected by the same or different wireless technologies.

[0314] In addition, the content described using specific numerical values is merely an example of numerical values used for convenience of explanation, and any suitable values can be applied.

[0315] In addition, the entity used in each embodiment can be used interchangeably with the sublayer. That is, the RRC entity, PDCP entity, RLC entity, and MAC entity can be replaced with the RRC sublayer, PDCP sublayer, RLC sublayer, and MAC sublayer respectively for explanation.

[0316] In addition, the terminal device 1 includes not only portable or mobile station devices, but also fixed or non-mobile electronic devices indoors and outdoors, such as AV devices, kitchen appliances, cleaning and washing equipment, air conditioning equipment, office equipment, vending machines, other household equipment and measuring equipment, vehicle-mounted equipment, as well as wearable devices or medical devices with communication functions. In addition, the terminal device 1 can be applied not only to device-to-device communication (Machine Type Communication), but also to communication between person-to-person, person-to-device, vehicle-to-person, vehicle-to-vehicle, and road building-to-vehicle (road and vehicle).

[0317] In addition, the terminal device 1 is also referred to as a user terminal, mobile station device, communication terminal, mobile device, terminal, UE (User Equipment), and MS (Mobile Station). The base station device 2 is also referred to as a radio base station device, base station, radio base station, fixed station, NB (NodeB), eNB (evolved NodeB), BTS (Base Transceiver Station), and BS (Base Station).

[0318] In addition, the base station device 2 is called NB in UMTS defined by 3GPP, and eNB in EUTRA and Advanced EUTRA. And the terminal device 1 in UMTS, EUTRA, and Advanced EUTRA defined by 3GPP is called UE.

[0319] In addition, for ease of explanation, functional block diagrams are used to illustrate, by specific combinations, the methods, units, or algorithm steps for implementing the functions of each part of the terminal device 1 and the base station device 2 or a part of these functions. However, they can be directly embodied by hardware, software modules executed by a processor, or a combination thereof.

[0320] If implemented by hardware, in addition to the block diagram configuration, the terminal device 1 and the base station device 2 may further include a power supply device or battery that supplies power to the terminal device 1 and the base station device 2, a liquid crystal device such as a display, a display driving device, a memory, an input / output interface and input / output terminals, a speaker, and other peripheral devices.

[0321] If implemented by software, the function can be retained or transmitted as one or more instructions or codes on a computer-readable medium. The computer-readable medium includes a communication medium and a computer recording medium, both of which are media that can carry a computer program from one place to another.

[0322] Furthermore, one or more instructions or codes are recorded on a computer-readable recording medium, and the computer system reads and executes one or more instructions or codes recorded in the recording medium, thereby controlling the terminal device 1 and the base station device 2. Furthermore, the "computer system" referred to here includes hardware such as an OS and peripheral devices.

[0323] The operations described in the embodiments of the present invention can be implemented by programs. The programs operated in the terminal device 1 and the base station device 2 according to the embodiments of the present invention are programs for controlling the CPU and the like (programs for operating the computer), thereby implementing the functions of the above-mentioned embodiments of the embodiments of the present invention. In addition, the information processed by these devices is temporarily stored in the RAM when it is processed, and then stored in various ROMs and HDDs, and read, modified, and written by the CPU as needed.

[0324] Furthermore, by executing the program, not only the functions of the above-described embodiments are realized, but also by cooperative processing with an operating system or another application program or the like based on instructions of the program, the functions of the various embodiments can be realized in some cases.

[0325] In addition, "computer-readable recording medium" refers to removable media such as semiconductor media (e.g., RAM, non-volatile memory card, etc.), optical recording media (e.g., DVD, MO, MD, CD, BD, etc.), magnetic recording media (e.g., magnetic tape, floppy disk, etc.), and storage devices such as magnetic disk units built into computer systems. Furthermore, "computer-readable recording medium" includes: media that dynamically retain programs for a short period of time, such as communication lines when sending programs via networks such as the Internet or communication lines such as telephone lines; and media that retain programs for a certain period of time, such as volatile memories inside computer systems that become servers or clients at this time.

[0326] Furthermore, the above-mentioned program may be used to realize a part of the above-mentioned functions, and further, the above-mentioned functions may be realized by combining with a program already recorded in the computer system.

[0327] In addition, part or all of the functional blocks or features of the terminal device 1 and the base station device 2 used in the above-mentioned embodiments can be implemented by a general-purpose processor, a digital signal processor (DSP), an integrated circuit for specific purposes (ASIC) or any integrated circuit (IC) for general purposes, a field programmable gate array signal (FPGA), or other programmable logic devices, discrete gate circuits or transistor logic circuits, discrete hardware components, or components that are combined together, which are designed to perform at least the functions described in this specification.

[0328] In addition, some or all of the functional blocks or features of the terminal device 1 and the base station device 2 used in the above-described embodiments can be implemented (executed) by a circuit designed to at least execute the functions described in this specification. Typically, it is an LSI as an integrated circuit, and can also be implemented (executed) as a chip set. Moreover, the chip set can be configured to include other components such as antennas and passive components. The functional blocks of the terminal device 1 and the base station device 2 can be formed into chips individually, or some or all of them can be integrated into a chip. Additionally, the method for forming an integrated circuit is not limited to LSI, and can be implemented by a dedicated circuit or a general-purpose processor. Furthermore, when an integrated circuit technology that replaces LSI appears due to the progress of semiconductor technology, an integrated circuit according to this technology can also be used.

[0329] The general-purpose processor can be a microprocessor, but the processor can also be an existing type of processor, controller, microcontroller, or state machine. The general-purpose processor or each of the above circuits can be composed of a digital circuit, an analog circuit, or both.

[0330] The processor can also be installed by combining computing devices. For example, a DSP and a microprocessor, multiple microprocessors, one or more microprocessors connected to a DSP core, or other such configurations can be combined.

[0331] As described above, although the embodiments of the present invention have been described in detail based on specific examples, the gist of each embodiment of the present invention and the scope of the claims are clearly not limited to these specific examples, and also include design changes and the like that do not deviate from the gist of the present invention. That is, the purpose of the description in this specification is to illustrate and not to impose any restrictions on each embodiment of the present invention.

[0332] In addition, the present invention can be variously modified within the scope shown in the claims, and embodiments obtained by appropriately combining different embodiments with each disclosed technical means are also included in the technical scope of the present invention. Moreover, a configuration in which elements having the same effect are replaced among the elements described in the above embodiments is also included in the technical scope of the present invention.

[0333] (Additional Explanation)

[0334] In addition, the present invention can be expressed as follows.

[0335] That is, in the terminal device according to the embodiment of the present invention, when the main cell and one or more secondary cells are set, and the discovery signal measurement timing configuration indicating the transmission timing of the discovery signal is included in the measurement object associated with the frequency of the deactivated secondary cell, the RSRP (Reference Signal Received Power) and RSRQ (Received Signal Strength Indicator) measurements for the deactivated secondary cell apply the discovery signal measurement timing configuration. When, for each set measurement identifier, information related to the RSSI (Received Signal Strength Indicator) report is included in the associated report setting, the discovery signal measurement timing configuration included in the measurement object associated with the report setting is applied, and the RSSI is measured at the frequency indicated by the measurement object.

[0336] In addition, the terminal device in the embodiment of the present invention performs RSSI measurement at the frequency indicated by the measurement object in the measurement interval based on the discovery signal measurement timing configuration.

[0337] In addition, when the terminal device in the embodiment of the present invention supports discovery signal measurement based on the CRS (Cell - Specific Reference Signal), the discovery signal measurement timing configuration is applied, and CRS measurement of the secondary cell is performed in the measurement interval based on the discovery signal measurement timing configuration.

[0338] In addition, the terminal device in the embodiment of the present invention performs either one, or both, of the measurement related to the first RSSI report and the measurement related to the second RSSI report in the measurement interval based on the discovery signal measurement timing configuration according to the report setting.

[0339] In addition, the base station device according to the embodiment of the present invention sets the main cell and one or more secondary cells for the terminal device. By notifying the terminal device of the measurement object including the discovery signal measurement timing configuration indicating the transmission timing of the discovery signal, the report setting including information related to the RSSI (Received Signal Strength Indicator) report, and the measurement identifier linking the report setting and the measurement object, the terminal device is caused to perform RSSI measurement at the frequency indicated by the measurement object in the measurement interval based on the discovery signal measurement timing configuration.

[0340] In addition, the base station device according to the embodiment of the present invention performs either one, or both, of the measurement related to the first RSSI report and the measurement related to the second RSSI report in the measurement interval based on the discovery signal measurement timing configuration according to the report setting.

[0341] In addition, in a communication system according to an embodiment of the present invention, a base station device sets a primary cell and one or more secondary cells for a terminal device, and notifies the terminal device of a measurement object including a discovery signal measurement timing configuration indicating a transmission timing of a discovery signal, a report setting including information related to an RSSI (Received Signal Strength Indicator) report, a link report setting, and a measurement identifier for the measurement object. When the discovery signal measurement timing configuration is included in the measurement object associated with the frequency of a deactivated secondary cell, the terminal device applies the discovery signal measurement timing configuration to the measurement of the RSRP (Reference Signal Received Power) and RSRQ (Reference Signal Received Quality) of the deactivated secondary cell. When the report setting associated with each set measurement identifier includes information related to the RSSI report, the terminal device applies the discovery signal measurement timing configuration included in the measurement object associated with the report setting, and performs an RSSI measurement at the frequency indicated by the measurement object.

[0342] In addition, a measurement method of a terminal device according to an embodiment of the present invention at least includes: a step of setting a primary cell and one or more secondary cells; a step of applying a discovery signal measurement timing configuration to the measurement of the RSRP (Reference Signal Received Power) and RSRQ (Reference Signal Received Quality) of a deactivated secondary cell when a setting of a discovery signal measurement timing configuration indicating a transmission timing of a discovery signal is included in the measurement object associated with the frequency of the deactivated secondary cell; a step of applying the discovery signal measurement timing configuration included in the measurement object associated with the report setting when the report setting associated with each set measurement identifier includes information related to an RSSI (Received Signal Strength Indicator) report; and a step of performing an RSSI measurement at the frequency indicated by the measurement object.

[0343] In addition, a measurement method of a terminal device according to an embodiment of the present invention includes: a step of performing an RSSI measurement of the frequency indicated by a measurement object in a measurement interval based on a discovery signal measurement timing configuration.

[0344] In addition, the measurement method of the terminal device according to the embodiment of the present invention includes: when the terminal device supports the measurement of the discovery signal based on CRS (Cell-specific reference signals), the step of applying the discovery signal measurement timing configuration; and the step of performing CRS measurement of the secondary cell in the measurement interval based on the discovery signal measurement timing configuration.

[0345] In addition, the measurement method of the terminal device according to the embodiment of the present invention includes: based on the report setting, performing any one or both of the measurement related to the first RSSI report and the measurement related to the second RSSI report in the measurement interval based on the discovery signal measurement timing configuration.

[0346] In addition, in the measurement method of the base station device according to the embodiment of the present invention, based on the steps of setting the primary cell and one or more secondary cells for the terminal device, and notifying the terminal device of the measurement object including the discovery signal measurement timing configuration indicating the transmission timing of the discovery signal, the report setting including the information related to the RSSI (Received Signal Strength Indicator) report, and the measurement identifier linking the report setting and the measurement object, the terminal device performs RSSI measurement of the frequency indicated by the measurement object in the measurement interval based on the discovery signal measurement timing configuration.

[0347] In addition, in the measurement method of the base station device according to the embodiment of the present invention, the terminal device performs any one or both of the measurement related to the first RSSI report and the measurement related to the second RSSI report in the measurement interval based on the discovery signal measurement timing configuration according to the report setting.

[0348] In addition, the integrated circuit installed in the terminal device according to the embodiment of the present invention enables the terminal device to perform at least the following functions: the function of setting a primary cell and one or more secondary cells; when the discovery signal measurement timing configuration indicating the transmission timing of the discovery signal is included in the measurement object associated with the frequency of the deactivated secondary cell, the function of applying the discovery signal measurement timing configuration to the measurement of the RSRP (Reference Signal Received Power) and RSRQ (Reference Signal Received Quality) of the deactivated secondary cell; when the associated report setting includes information related to the RSSI (Received Signal Strength Indicator) report for each set measurement identifier, the function of applying the discovery signal measurement timing configuration included in the measurement object associated with the report setting; and the function of performing RSSI measurement on the frequency indicated by the measurement object.

[0349] In addition, the integrated circuit installed in the base station device according to the embodiment of the present invention enables the base station device to perform at least the following functions: the function of setting a primary cell and one or more secondary cells for the terminal device; the function of notifying the terminal device of a measurement object including a discovery signal measurement timing configuration indicating the transmission timing of the discovery signal, a report setting including information related to the RSSI (Received Signal Strength Indicator) report, and a measurement identifier linking the report setting and the measurement object, whereby the terminal device performs RSSI measurement on the frequency indicated by the measurement object in the measurement interval based on the discovery signal measurement timing configuration.

[0350] Industrial Applicability

[0351] Embodiments of the present invention can be applied to at least mobile phones, personal computers, tablet computers, etc.

[0352] Reference Numeral Explanation

[0353] 1... Terminal device

[0354] 2, 2-1, 2-2... Base station device

[0355] 101, 201... Receiving unit

[0356] 102, 202... Demodulating unit

[0357] 103, 203... Decoding unit

[0358] 104, 204... Received data control unit

[0359] 105, 205... Physical layer control unit

[0360] 106, 206... Transmitted data control unit

[0361] 107, 207... Encoding unit

[0362] 108, 208... Modulation unit

[0363] 109, 209... Transmission unit

[0364] 110, 210... Radio resource control unit

[0365] 211... Network signal transmission / reception unit

[0366] R01, R02... Receiving antenna unit

[0367] T01, T02... Transmitting antenna unit.

Claims

1. A terminal device (1) for evolved universal terrestrial radio access (EUTRA), licensed assisted access (LAA), characterized in that, The terminal device (1) includes a processor and a memory. The memory stores one or more instructions or codes executable by the processor. When the one or more instructions or codes are executed by the processor, the terminal device (1) is caused to: Be configured to receive information for configuring reports for a primary cell and one or more secondary cells of the terminal device (1), wherein the information includes a report configuration identifier associated with each report configuration, and each report configuration includes information indicating a reporting interval, a measurement RSSI range, and a first threshold and a second threshold associated with RSSI reporting; and Be configured to periodically report, as a measurement result, a histogram representing the number of RSSI measurement values less than the first threshold, the number of RSSI measurement values equal to or greater than the first threshold and less than the second threshold, and the number of RSSI measurement values equal to or greater than the second threshold, Wherein, when the actual measurement time is less than the measurement RSSI range, the terminal device (1) is configured not to perform RSSI reporting in the form of a histogram.

2. A communication system for evolved universal terrestrial radio access (EUTRA), licensed assisted access (LAA), and including a terminal device (1) and a base station device (2, 2-1, 2-2), characterized in that: The base station device (2, 2-1, 2-2) is configured to send information for configuring reports for a primary cell and one or more secondary cells of the terminal device (1), wherein the information includes a report configuration identifier associated with each report configuration, and each report configuration includes information indicating a reporting interval, a measurement RSSI range, and a first threshold and a second threshold associated with RSSI reporting, and The terminal device (1) is configured to periodically report, as a measurement result, a histogram representing the number of RSSI measurement values less than the first threshold, the number of RSSI measurement values equal to or greater than the first threshold and less than the second threshold, and the number of RSSI measurement values equal to or greater than the second threshold, Wherein, when the actual measurement time is less than the measurement RSSI range, the terminal device (1) is configured not to perform RSSI reporting in the form of a histogram.

3. A measurement method for a terminal device (1), applicable to Evolved Universal Terrestrial Radio Access (EUTRA) and Licensed-Assisted Access (LAA), characterized in that, At least includes the following steps: Be configured to receive information for configuring reports for a primary cell and one or more secondary cells of the terminal device (1), wherein the information includes a report configuration identifier associated with each report configuration, and each report configuration includes information indicating a reporting interval, a measurement RSSI range, and a first threshold and a second threshold associated with RSSI reporting; and Periodically report, as a measurement result, a histogram representing the number of RSSI measurement values less than the first threshold, the number of RSSI measurement values equal to or greater than the first threshold and less than the second threshold, and the number of RSSI measurement values equal to or greater than the second threshold, Among them, in the case where the actual measurement time is less than the measurement RSSI interval, the terminal device (1) is set not to perform RSSI reporting in the form of a histogram.

4. The method according to claim 3, wherein The method further includes: Receiving a measurement setting sent by the base station device (2, 2-1, 2-2), where the measurement setting includes measurement parameters; Measuring the serving cell, adjacent cells, and / or detected cells according to the measurement parameters.

5. The method according to claim 4, wherein The measurement includes at least one of the following at least: Intra-frequency measurement, inter-frequency measurement, or inter-radio access technology measurement.

6. The method according to claim 4 or 5, wherein, The measurement parameters include a measurement identifier, a measurement object, a reporting setting, a quantity setting, a measurement gap setting, or a serving cell quality threshold.

7. A measurement method for a communication system including a terminal device (1) and base station devices (2, 2-1, 2-2) for evolved universal terrestrial radio access (EUTRA), licensed assisted access (LAA), characterized in that, At least includes the following steps: Sending, by the base station device (2, 2-1, 2-2), information for setting reports for the primary cell and one or more secondary cells for the terminal device (1), where the information includes a reporting setting identifier associated with each reporting setting, and each reporting setting includes information indicating a reporting interval, a measurement RSSI interval, and a first threshold and a second threshold associated with the RSSI reporting; and Periodically reporting a histogram as a measurement result, the histogram representing the number of RSSI measurement values less than the first threshold, the number of RSSI measurement values equal to or greater than the first threshold and less than the second threshold, and the number of RSSI measurement values equal to or greater than the second threshold, Among them, in the case where the actual measurement time is less than the measurement RSSI interval, the terminal device (1) is set not to perform RSSI reporting in the form of a histogram.

8. The method according to claim 7, wherein The method further includes: Sending a measurement setting by the base station device (2, 2-1, 2-2), where the measurement setting includes measurement parameters, and the measurement parameters are used to measure the serving cell, adjacent cells, and / or detected cells.

9. The method according to claim 8, wherein The measurement includes at least one of the following at least: Intra-frequency measurement, inter-frequency measurement, or inter-radio access technology measurement.

10. The method according to claim 8 or 9, wherein, The measurement parameters include a measurement identifier, a measurement object, a reporting setting, a quantity setting, a measurement gap setting, or a serving cell quality threshold.

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