Terminal, wireless communication method, base station, and system

Abstract

This application relates to a terminal, a wireless communication method, a base station, and a system. The terminal includes: a receiving unit that receives: system information containing first information related to PUCCH resources, and downlink control information containing second information related to PUCCH resources and used for at least one of a response message to a random access preamble and a contention resolution message during random access; and a control unit that controls the transmission of uplink control information based on the first information and the second information, wherein the first information is information related to PUCCH resources commonly set for the terminal, and the second information is information related to PUCCH resources individually set for the terminal. The first information related to PUCCH resources includes information related to frequency hopping and a cyclic shift index.

Description

[0001] This application is a divisional application of the patent application filed on November 8, 2017, with application number 201780081986.1, entitled "User Terminal and Wireless Communication Method". Technical Field

[0002] This invention relates to terminals, wireless communication methods, base stations, and systems in next-generation mobile communication systems. Background Technology

[0003] In UMTS (Universal Mobile Telecommunications System) networks, Long Term Evolution (LTE) has been standardized with the aim of achieving even higher data rates and lower latency (Non-Patent Document 1). Furthermore, LTE-A (also known as LTE Advanced, LTE Rel.10, 11, or 12) has been standardized with the aim of surpassing LTE (also known as LTE Rel.8 or 9) in terms of wider bandwidth and higher speed. Subsequent systems to LTE (such as FRA (Future Radio Access), 5G (5th generation mobile communication system), NR (New Radio), NX (New Radio Access), FX (Future Generation Radio Access), LTE Rel.13, 14, or 15 and beyond) are also under discussion.

[0004] In LTE Rel.10 / 11, to achieve wideband coverage, carrier aggregation (CA) was introduced, which combines multiple component carriers (CCs). Each CC is constructed using the LTE Rel.8 system band as a unit. Furthermore, in CA, multiple CCs from the same radio base station (eNB) are configured for the user equipment (UE).

[0005] On the other hand, LTE Rel.12 also introduced dual connectivity (DC) for UEs using multiple cell groups (CGs) of different radio base stations. Each cell group consists of at least one cell (CC). Because the DC aggregates multiple CCs from different radio base stations, it is also called inter-eNB CA (Inter-eNB CA), etc.

[0006] Furthermore, in existing LTE systems (e.g., LTE Rel.8-13), UL data can be transmitted from the user terminal once UL synchronization is established between the radio base station and the user terminal. Therefore, existing LTE systems support the Random Access Channel Procedure (RACH procedure, also known as the access procedure) for establishing UL synchronization.

[0007] During random access, the user terminal obtains information related to the transmission timing of UL (Timing Advance (TA)) based on the response (random access response) from the radio base station to the randomly selected preamble (random access preamble), and establishes UL synchronization based on the TA.

[0008] After establishing UL synchronization, the user terminal receives downlink control information (DCI) (UL license) from the wireless base station and then uses the UL resources allocated by the UL license to send UL data.

[0009] Existing technical documents

[0010] Non-patent literature

[0011] Non-patent document 1: 3GPP TS 36.300 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage2" Summary of the Invention

[0012] The problem that the invention aims to solve

[0013] In future wireless communication systems (e.g., 5G, NR, etc.), there is a need to accommodate a variety of services within a single framework, such as high-speed and high-capacity communication (enhanced Mobile Broadband (eMBB), massive connections between machine-to-machine communication (M2M) devices from IoT (Internet of Things) devices or MTC (Machine Type Communication) devices, or low-latency and highly reliable communication (ultra-reliable and low-latency communications (URLLC)).

[0014] In this way, we envision a future wireless communication system that mixes multiple services with different latency reduction requirements. Therefore, it is desirable for future wireless communication systems to accommodate multiple user terminals with different parameter sets (also known as multi-parameter sets, etc.). Here, a parameter set refers to at least one of the following: communication parameters in both the frequency and time directions, or either one (e.g., subcarrier spacing, bandwidth, symbol length, CP (Cyclic Prefix) length, TTI length, number of symbols per TTI, radio frame structure, filtering processing, windowing processing, etc.).

[0015] Furthermore, it is envisioned that future wireless communication systems will support flexible transmit and receive bandwidth based on the capabilities of the user terminal (UE). Therefore, the possibility that the design principles of the uplink and / or downlink control channels in future wireless communication systems will differ from those in existing LTE systems is also considered. For example, the structure of the uplink control channel used in the transmission of uplink control information may be configured differently.

[0016] Furthermore, while the application of communication processes (e.g., random access procedures) used in existing LTE systems is being considered for future wireless communication systems, how to control the random access procedures in future wireless communication systems remains a problem.

[0017] The present invention was made in view of the above-mentioned problems, and one of its objectives is to provide a user terminal and a wireless communication method that can properly implement random access procedures in future wireless communication systems.

[0018] Methods for solving problems

[0019] One aspect of the present invention relates to a user terminal utilizing a random access procedure, characterized in that it comprises: a receiving unit for receiving a contention resolution message during the random access; and a control unit for controlling the transmission of a delivery confirmation signal for the contention resolution message, the control unit controlling the transmission of the delivery confirmation signal using predetermined uplink control channel resources, at least based on the uplink control channel setting information contained in the random access response signal or the contention resolution message.

[0020] Invention Effects

[0021] According to the present invention, random access procedures can be appropriately implemented in future wireless communication systems. Attached Figure Description

[0022] Figure 1 This is a diagram illustrating an example of a contention-based random access procedure.

[0023] Figure 2 This is a diagram illustrating an example of the uplink control channel structure and / or resources.

[0024] Figure 3 This is a diagram illustrating an example of a communication method that includes a random access procedure in the first mode.

[0025] Figure 4 This is a diagram illustrating an example of a communication method that includes a random access procedure in the second approach.

[0026] Figure 5 This is a diagram illustrating an example of a communication method that includes a random access procedure in the third approach.

[0027] Figure 6 This is a diagram illustrating other examples of communication methods that include a random access procedure in the third approach.

[0028] Figure 7 This is a diagram illustrating an example of the content of the uplink control channel configuration information.

[0029] Figure 8 This is a diagram illustrating an example of the general structure of a wireless communication system according to an embodiment of the present invention.

[0030] Figure 9 This is a diagram illustrating an example of the overall structure of a wireless base station according to an embodiment of the present invention.

[0031] Figure 10 This is a diagram illustrating an example of the functional structure of a wireless base station according to an embodiment of the present invention.

[0032] Figure 11This is a diagram illustrating an example of the overall structure of a user terminal according to an embodiment of the present invention.

[0033] Figure 12 This is a diagram illustrating an example of the functional structure of a user terminal according to an embodiment of the present invention.

[0034] Figure 13 This is a diagram illustrating an example of the hardware structure of a wireless base station and a user terminal according to an embodiment of the present invention. Detailed Implementation

[0035] In existing LTE systems (e.g., LTE Rel.8-13), a random access procedure is supported for establishing UL synchronization. This random access procedure includes contention-based random access (also known as CBRA: Contention-Based Random Access, etc.) and non-contention-based random access (also known as Non-CBRA, Contention-Free Random Access (CFRA: Contention-Free Random Access, etc.)).

[0036] In Contention-Based Random Access (CBRA), the user terminal sends a preamble randomly selected from multiple preambles specified for each cell (also known as random access preambles, Physical Random Access channels (PRACH), RACH preambles, etc.). Furthermore, Contention-Based Random Access is a user terminal-driven random access process, which can be used, for example, during initial access, at the start of UL transmission, or at the restart of the process.

[0037] On the other hand, in Non-Contention-Free Random Access (CFRA), the radio base station specifically allocates preambles to user terminals via downlink (DL) control channels (PDCCH, Enhanced PDCCH, etc.), and the user terminal transmits the preamble allocated by the radio base station. Non-Contention-Free Random Access is a network-driven random access process, which can be used, for example, during handover, at the start or restart of DL transmission (when DL transmission begins or restarts in the UL with retransmission indication information), etc.

[0038] Figure 1 This is a diagram illustrating an example of contention-based random access. Figure 1In this process, the user terminal receives information (PRACH structure information) in advance that represents the structure of the random access channel (PRACH) (PRACH configuration, RACH configuration) through system information (e.g., MIB (Master Information Block) and / or SIB (System Information Block)) or higher-layer signaling (e.g., RRC (Radio Resource Control) signaling).

[0039] The PRACH structure information can, for example, represent multiple preambles specified for each cell (e.g., preamble format), time resources used in PRACH transmission (e.g., system frame number, subframe number), and frequency resources (e.g., the offset of the starting position of the 6 resource blocks (PRB: Physical Resource Block) (prach-FrequencyOffset)).

[0040] like Figure 1 As shown, in cases where the user terminal transitions from the idle (RRC_IDLE) state to the RRC connected (RRC_CONNECTED) state (e.g., during initial access), or in cases where the user terminal is in the RRC connected state but has not established UL synchronization (e.g., at the start or restart of UL transmission), the user terminal randomly selects one of the multiple preambles represented by the PRACH structure information and sends the selected preamble (message 1) via PRACH.

[0041] If the preamble is detected, the wireless base station sends a Random Access Response (RAR) as a response (message 2). If, after the preamble is sent, the RAR fails to be received within the specified period (RAR window), the user terminal increases the PRACH transmission power and retransmits (retransmits) the preamble. This increase in transmission power during retransmission is also known as power ramping.

[0042] Upon receiving the RAR, the user terminal adjusts the UL transmission timing based on the Timing Advancement (TA) contained in the RAR and establishes UL synchronization. Furthermore, within the UL resources specified by the UL license contained in the RAR, the user terminal sends a higher-layer (L2 / L3) control message (Message 3). This control message contains the user terminal's identifier (UE-ID). For example, in RRC connected state, the user terminal's identifier could be a C-RNTI (Cell-Radio Network Temporary Identifier), or in idle state, the user terminal's identifier could be a higher-layer UE-ID such as an S-TMSI (System Architecture Evolution-Temporary Mobile Subscriber Identifier).

[0043] The wireless base station sends a contention resolution message (message 4) based on the control messages from higher layers. This contention resolution message is sent based on the destination identifier of the user terminal contained in the aforementioned control message. The user terminal that successfully detects the contention resolution message sends an acknowledgment (ACK) in the HARQ (Hybrid Automatic Repeat reQuest) to the wireless base station. Thus, the idle user terminal transitions to the RRC connected state.

[0044] On the other hand, if a user terminal fails to detect the contention resolution message, it determines that a contention has occurred and selects a preamble again, repeating the random access procedure of messages 1 to 4. If the contention is resolved by an ACK from the user terminal, the wireless base station sends a UL license to the user terminal. The user terminal uses the UL resources allocated by the UL license to transmit UL data.

[0045] Furthermore, in existing LTE systems, HARQ is applied after message 3. For example, the user terminal determines the PUCCH resources based on the uplink control channel resource information commonly notified to the user terminal through system information and the index of the control channel element (CCE) contained in the downlink control channel (PDCCH).

[0046] In the contention-based random access described above, a user terminal can spontaneously initiate a random access process when it desires to send UL data. Furthermore, after establishing UL synchronization, UL data is sent using UL resources specifically allocated to the user terminal through UL licensing, thus enabling highly reliable UL transmission.

[0047] In 5G and / or NR (5G / NR), the use of random access preambles, similar to existing LTE systems, is also considered. However, if existing LTE system transmission and reception methods (e.g., HARQ) are directly applied to the random access procedure in 5G / NR, the random access procedure may no longer be appropriate. The following explains the problems encountered when applying existing LTE system methods to the random access procedure in 5G / NR (e.g., using the uplink control channel).

[0048] In future wireless communication systems (e.g., 5G, NR), it is anticipated that a wide variety of wireless communication services will be implemented to meet diverse requirements (e.g., ultra-high speed, high capacity, ultra-low latency, etc.). Therefore, the introduction of time units with structures different from those in existing LTE systems (before LTE Rel.13) is being explored in future wireless communication systems (e.g., frames, subframes, time slots, mini-time slots, sub-time slots, Transmission Time Interval (TTI)). For example, a subframe is a time unit with a defined duration (e.g., 1 ms) independent of a set of parameters.

[0049] A time slot is a time unit based on a set of parameters (e.g., subcarrier spacing and / or symbol length) and the number of symbols. For example, with subcarrier spacing of 15 kHz or 30 kHz, each time slot can contain 7 or 14 symbols. On the other hand, with subcarrier spacing of 60 kHz or more, each time slot can contain 14 symbols. Furthermore, a time slot can also contain multiple mini (sub)time slots.

[0050] In future wireless communication systems, flexible transmit and / or receive bandwidths will be supported based on the capabilities of the user terminal (UE). In this case, transmit and / or receive bandwidths will be set for each user terminal to control communication. That is, in 5G / NR, it is envisioned that the design principles of the downlink control channel and / or uplink control channel will be defined differently from those of the existing LTE system.

[0051] For example, in existing LTE systems, the entire system bandwidth is used to transmit downlink control channels (or downlink control information). In contrast, in 5G / NR, the downlink control information for a specific UE may not be allocated to the entire system bandwidth for transmission. Instead, a specific frequency domain is set to control the transmission of downlink control information. This specific frequency domain set for the UE is also called the control subband.

[0052] Furthermore, in existing LTE systems, uplink control channels (or uplink control information) are transmitted using both ends of the system band. In contrast, 5G / NR considers a structure that configures channels for downlink (DL) transmission and channels for uplink (UL) transmission within a specific time unit (e.g., a time slot) for communication. The channels for DL ​​transmission correspond to downlink control channels and / or downlink data channels, while the channels for UL transmission correspond to uplink control channels and / or uplink data channels.

[0053] Figure 2 This illustrates an example of the structure of an uplink control channel defined within a specified time unit (e.g., also referred to as a frame, subframe, time slot, mini-time slot, or sub-time slot) to be used in a future wireless communication system. Figure 2 In this configuration, the time slots configured for UL data channels are primarily used for UL communication, and therefore can also be referred to as UL-centric slots, etc. Furthermore, it is also possible to set time intervals for UL-only transmission. Additionally, although in Figure 2 While not shown in the diagram, the configuration of the uplink control channel within the time slot configured for the DL data channel (also known as the DL centric slot, etc.) is also considered.

[0054] like Figure 2 As shown, for the time domain where the uplink control channel is allocated, consider structures such as configuring it in the last symbol of the time slot (or, the last symbol to several symbols), configuring it in the entire time slot, and configuring it in a region other than the first few symbols (e.g., the downlink control channel and the gap interval). Furthermore, consider structures that allocate the uplink control channel to one or more regions within the time slot.

[0055] In situations where multiple uplink control channel structures are supported, it is necessary to determine which uplink control channel structure and / or resources the user terminal will utilize for transmitting uplink control information (e.g., HARQ-ACK). For example, during random access, when using the uplink control channel to transmit a delivery acknowledgment signal for message 4 (also known as HARQ-ACK, A / N), determining which uplink control channel structure and / or resources to apply becomes a problem.

[0056] Once an RRC connection has been established with a user terminal (RRC Connected), the radio base station can use RRC signaling to notify each user terminal of information related to the uplink control channel structure and / or resources. This allows the user terminal to select the appropriate uplink control channel structure and / or resources.

[0057] On the other hand, if an RRC connection is not established between the radio base station and the user terminal (e.g., during initial access by the user terminal, or when transitioning from an idle state to an RRC-connected state), the radio base station cannot use RRC signaling to notify the user terminal of information. In this case, similar to existing LTE systems, a method based on the control channel element (CEE) index constituting the downlink control channel is considered to determine the uplink control channel resources. However, as mentioned above, in 5G / NR, it may be difficult to flexibly support situations where there are user terminals with different operating bandwidths and / or new uplink control channel structures.

[0058] Therefore, the inventors of this invention, considering the possibility of utilizing DL transmissions supported prior to message 4 of the random access procedure even before the RRC connection state, conceived of using at least message 2 or message 4 to notify the user terminal of information related to the uplink control channel (also referred to as uplink control channel structure information and / or resource information).

[0059] The following describes this embodiment in detail. Furthermore, in the following description, message 2 can be used as a response signal from the base station for the random access preamble, and message 4 can be used as a setting information notification signal for RRC connection.

[0060] (Method 1)

[0061] In the first method, the configuration information of the uplink control channel (e.g., PUCCH) configured for use in delivering the acknowledgment signal corresponding to message 4 is included in message 4 and notified to the user terminal. The configuration information of the uplink control channel is only information used for transmitting the uplink control channel; it is also called uplink control channel structure information and / or resource information.

[0062] The wireless base station notifies each user terminal of the uplink control channel configuration information included in message 4 (e.g., downlink control information (DL clearance)). In this case, the wireless base station can notify each user terminal of uplink control channel configuration information specific to the user terminal. Upon receiving a delivery acknowledgment signal (HARQ-ACK) for message 4, the user terminal can determine the structure and / or resources of the uplink control channel based on the uplink control channel configuration information notified from the wireless base station.

[0063] The user terminal controls the sending of a delivery confirmation signal for message 4 at a predetermined time. This predetermined time can be set later than the time of existing LTE systems (e.g., 4ms after receiving message 4). This ensures, to some extent, the period from receiving the uplink control channel setting information contained in message 4 until the uplink control channel structure and / or resources specified by that information are determined, thus reducing the processing load on the user terminal.

[0064] The timing can be defined in advance through specifications, or it can be notified to the user terminal in advance from the wireless base station using message 2 and / or system information.

[0065] Furthermore, if the user terminal determines that the delivery acknowledgment signal for received message 4 is NACK, it is highly likely that it will not be able to fully receive the uplink control channel configuration information contained in message 4. Therefore, if the delivery acknowledgment signal for message 4 is NACK, the user terminal can control the transmission of this acknowledgment signal. This avoids the situation where the user terminal uses an incorrect uplink control channel structure and / or resources to transmit the delivery acknowledgment signal. As a result, it can suppress uplink control channel contention with other user terminals.

[0066] The wireless base station awaits a delivery confirmation signal from the user terminal that received message 4 within the specified period. Furthermore, if no ACK is detected from the user terminal, the wireless base station determines that message 4 was sent as NACK (the user terminal incorrectly detected message 4) and retransmits message 4 (retransmission).

[0067] Figure 3 This illustrates an example of a wireless communication method in the first approach that includes a random access procedure. First, the user terminal receives a broadcast signal and / or broadcast channel (system information) (ST01) transmitted from a wireless base station. The system information consists of a MIB (Master Information Block) and / or a SIB (System Information Block).

[0068] After obtaining information representing the structure of the PRACH based on system information, the user terminal selects a preamble to transmit the random access preamble (PRACH) (ST02). Furthermore, if, after transmitting the PRACH, RAR reception fails within a specified period (RAR window) (e.g., RAR reception fails), the user terminal increases the PRACH transmission power and retransmits the PRACH (ST03). Increasing the transmission power during PRACH retransmission is also known as power ramping.

[0069] If a PRACH is detected from the user terminal, the wireless base station sends a Random Access Response (RAR, also known as message 2) in response to it (ST04).

[0070] Upon receiving the RAR, the user terminal adjusts the transmission timing of the UL based on the timing advance (TA) contained in the RAR and establishes UL synchronization. Furthermore, the user terminal uses the uplink data channel (e.g., PUSCH) to transmit higher-layer (L2 / L3) control messages (message 3) (ST05) through the UL resources specified by the UL license contained in the RAR.

[0071] The user terminal notifies the radio base station by including its user terminal identifier (UE-ID) in message 3. For example, if it is in an RRC connected state, the user terminal identifier can be C-RNTI (Cell-Radio Network Temporary Identifier), or if it is in an idle state, the user terminal identifier can be a higher-level UE-ID such as S-TMSI (System Architecture Evolution Temporary Mobile Subscriber Identifier).

[0072] Furthermore, the user terminal can also include information related to its operating bandwidth (supported bandwidth, etc.) in message 3 and send it to the wireless base station. Thus, the wireless base station receiving message 3 can flexibly determine the uplink control channel structure and / or resources configured for the user terminal.

[0073] If message 3 is not properly received from the user terminal, the wireless base station resends a UL permission (ST06) to the user terminal instructing the retransmission of message 3. The user terminal, having received the UL permission for retransmission of message 3, retransmits message 3 (ST07).

[0074] The wireless base station sends a contention resolution message (message 4) (ST08) based on message 3 sent from the user terminal. This message 4 can be sent based on the user terminal's identifier destination contained in message 3. Furthermore, the wireless base station notifies the user terminal of the uplink control channel configuration information used by the user terminal in sending the delivery confirmation signal for message 4 (e.g., DL permission) within message 4.

[0075] The wireless base station waits for a delivery confirmation signal from the user terminal that received message 4 within a specified period. If no ACK is detected from the user terminal within this specified period, the wireless base station determines that the user terminal has erroneously detected message 4 (NACK) and retransmits message 4 (ST09). Furthermore, the wireless base station can include the uplink control channel configuration information used by each user terminal in the retransmitted message 4 and notify the user terminal accordingly.

[0076] Furthermore, the uplink control channel configuration information contained in the initial message 4 sent by the user terminal can be the same as, or different from, the uplink control channel configuration information contained in the retransmitted message 4. By enabling the transmission of different content via message 4, the uplink control channel configuration for each user terminal can be flexibly controlled.

[0077] The user terminal that has appropriately received message 4 responds with an ACK (ST10) using the uplink control channel structure and / or resources specified by the uplink control channel configuration information contained in message 4. In this way, by controlling the transmission of the uplink control channel based on the uplink control channel configuration information contained in message 4, the user terminal can select the appropriate uplink control channel structure and / or resources even when multiple uplink control channel structures and / or resources supported by the communication exist.

[0078] Furthermore, if the delivery acknowledgment signal for received message 4 is determined to be NACK, the user terminal will control the system to prevent the transmission of the delivery acknowledgment signal (NACK). This prevents the user terminal from transmitting delivery acknowledgment signals using incorrect uplink control channel structures and / or resources, and from competing with other user terminals for uplink control channels.

[0079] (Method 2)

[0080] In the second method, the configuration information of the uplink control channel, which is set up to be used for the delivery confirmation signal of message 4, is included in message 2 and notified to the user terminal. The configuration information of the uplink control channel is only information used for the transmission of the uplink control channel, and it is also referred to as uplink control channel structure information and / or resource information.

[0081] The wireless base station notifies each user terminal of the uplink control channel configuration information included in message 2 (e.g., downlink control information (UL license)). In this case, the wireless base station can notify each user terminal of uplink control channel configuration information specific to the user terminal. Upon receiving a HARQ-ACK signal in response to message 4, the user terminal can determine the structure and / or resources of the uplink control channel based on the uplink control channel configuration information notified from the wireless base station.

[0082] The user terminal controls the sending of a delivery confirmation signal for message 4 at a predetermined time. The predetermined time can be defined in advance by the specification, or it can be notified to the user terminal in advance from the wireless base station using message 2 and / or system information.

[0083] As an example of a predetermined timing, it can be set in the same way as the timing of existing LTE systems (e.g., 4ms after receiving message 4). When uplink control channel information is obtained via message 2, compared to the case where it is obtained via message 4, a longer processing time can be ensured in the user terminal before the timing of sending the delivery confirmation signal for message 4. Therefore, even when the timing is set in the same way as existing LTE systems, the increase in processing load in the user terminal can be suppressed.

[0084] Furthermore, even if the delivery acknowledgment signal for message 4 is determined to be NACK, it is still highly likely that the user terminal will be able to properly receive the uplink control channel setting information contained in message 2. Therefore, even if the delivery acknowledgment signal for message 4 is NACK, the user terminal can use the prescribed uplink control channel to send NACK feedback to the radio base station, just like with ACK. Thus, even if the user terminal fails to receive message 4, the radio base station can make a judgment based on the notification from the user terminal.

[0085] The wireless base station can use a portion of the resource information (allocation field) for message 3 as uplink control channel setting information (e.g., resource information) in the UL permission included in the RAR (message 2). That is, a portion of the bit field of the UL permission used to specify the resources (e.g., uplink data channel) utilized in the transmission of message 3 can be used to specify the resources for the delivery acknowledgment signal of message 4. This suppresses the increase in bits that would result from setting the uplink control channel setting information.

[0086] In this scenario, the user terminal determines the uplink control channel structure and / or resources based on the specified bit fields contained in the UL permission of message 2. Furthermore, when a UL permission instructing retransmission of message 3 is sent from the radio base station to the user terminal, the user terminal uses the information contained in the latest UL permission (updating the uplink control channel setting information) to control the transmission of the uplink control channel.

[0087] Figure 4 This illustrates an example of a wireless communication method that includes a random access procedure in the second approach. Furthermore, descriptions of parts identical to the first approach described above are omitted.

[0088] First, the user terminal receives a broadcast signal and / or broadcast channel transmitted from the wireless base station (ST01). Next, the user terminal selects a preamble to transmit PRACH (ST02). Furthermore, if RAR is not successfully received within a specified period after transmitting PRACH, the user terminal increases the transmission power of PRACH and retransmits PRACH (ST03). ST01-ST03 can be performed in the same manner as in the first method described above.

[0089] If the wireless base station detects a PRACH sent from the user terminal, it sends a Random Access Response (RAR, also known as message 2) in response (ST04). The wireless base station notifies the user terminal of the uplink control channel configuration information used by the user terminal in sending the delivery confirmation signal for message 4, including this information in message 2. Alternatively, the uplink control channel configuration information can also utilize a portion of the resource information specifying the transmission of message 3 in the existing LTE system.

[0090] Upon receiving the RAR, the user terminal adjusts the UL transmission timing based on the timing advance (TA) contained in the RAR and establishes UL synchronization. Furthermore, the user terminal transmits message 3 (ST05) using an uplink data channel (e.g., PUSCH) through the UL resources specified by the UL license contained in the RAR.

[0091] If message 3 is not properly received from the user terminal, the wireless base station resends a UL permission (ST06) to the user terminal to instruct the transmission of message 3. Upon receiving the UL permission for retransmission of message 3, the user terminal retransmits message 3 (ST07). Furthermore, if the retransmitted UL permission contains uplink control channel configuration information, the user terminal updates itself with the uplink control channel configuration information contained in the most recently received UL permission.

[0092] The wireless base station sends message 4 (ST08) based on message 3 sent from the user terminal. Message 4 can be sent based on the destination of the user terminal identifier contained in message 3.

[0093] Based on the reception status of message 4, the user terminal sends a delivery acknowledgment signal (ACK or NACK) to the radio base station (ST11). The user terminal uses the uplink control channel structure and / or resources specified by the uplink control channel configuration information contained in message 2 to send back the delivery acknowledgment signal. ST11 indicates the user terminal's response of NACK to message 4.

[0094] Even if the delivery acknowledgment signal for message 4 is determined to be NACK, the user terminal is still very likely to be able to properly receive the uplink control channel setting information contained in message 2. Therefore, even if the delivery acknowledgment signal for message 4 is NACK, the user terminal can still use the prescribed uplink control channel to feed back NACK to the radio base station, just like with ACK.

[0095] If a NACK is received from the user terminal, the wireless base station retransmits message 4 based on the NACK (ST09).

[0096] The user terminal that has appropriately received message 4 sends an ACK (ST10) using the uplink control channel configuration information contained in message 2 (or the UL permission for retransmission). In this way, by controlling the transmission of the uplink control channel based on the uplink control channel configuration information contained in message 2, the user terminal can select the appropriate uplink control channel configuration and / or resources even when multiple uplink control channel configurations and / or resources supported by the communication exist.

[0097] Furthermore, in the case of retransmitting message 4, the wireless base station can also notify the user terminal by including the uplink control channel configuration information in the retransmitted message 4, as shown in the first method described above. This allows for flexible control of the uplink control channel structure and / or resources.

[0098] (Method 3)

[0099] In the third method, a portion of the configuration information of the uplink control channel, which is set to be used for the delivery confirmation signal corresponding to message 4, is included in the system information (e.g., SIB), and the remaining portion is included in message 2 and / or message 4 to notify the user terminal.

[0100] The wireless base station notifies (broadcasts) multiple user terminals by including a portion of the uplink control channel configuration information (e.g., common uplink control channel configuration information for user terminals) in system information. Furthermore, the wireless base station notifies each user terminal by including another portion of the uplink control channel configuration information (e.g., user terminal-specific uplink control channel configuration information) in message 2 and / or message 4. As system information, for example, PUCCH-ConfigCommon contained in SIB2 can be utilized.

[0101] In other words, the uplink control channel configuration information is publicly notified to the user terminal in advance, and specific uplink control channel configuration information is notified to the user terminal in an appended manner using message 2 (e.g., within downlink control information (UL license)) and / or message 4 (e.g., within downlink control information (DL license)). This suppresses the increase in the amount of information (number of bits) appended to message 2 and / or message 4.

[0102] For example, a wireless base station uses system information (e.g., SIB) to notify multiple user terminals of multiple uplink control channel structure and / or resource candidates. The wireless base station then transmits information (bit values) specifying a candidate (index) from the multiple uplink control channel structure and / or resource candidates (indexes) set for the user terminals, including this information in messages 2 and / or 4.

[0103] Alternatively, the wireless base station uses system information (e.g., SIB) to notify multiple user terminals of the basic uplink control channel structure and / or resources (also known as the basic structure or default structure). The wireless base station then transmits messages 2 and / or 4, including offsets of some or all of the parameters relative to the uplink control channel structure and / or resources (default structure) set for the user terminals.

[0104] The user terminal determines the uplink control channel structure and / or resources to be used during transmission based on the uplink control channel configuration information notified by the system information and the additional uplink control channel configuration information (specification information) notified by message 2 and / or message 4.

[0105] <Using System Information + Message 2>

[0106] Figure 5 This illustrates an example of a wireless communication method that includes a random access procedure in the third approach. Furthermore, descriptions of parts identical to those in the first or second approach described above are omitted.

[0107] First, the user terminal receives broadcast signals and / or broadcast channels (system information) (ST01) transmitted from the wireless base station. The system information includes a portion of uplink control channel configuration information (e.g., common uplink control channel configuration information for user terminals). For example, the user terminal obtains candidates for multiple uplink control channel structures and / or resources configured for multiple user terminals from the system information. Alternatively, the user terminal obtains the basic structure (or default structure) of the uplink control channel structures and / or resources configured for multiple user terminals from the system information.

[0108] Next, the user terminal selects the specified preamble to send the PRACH (ST02). Furthermore, if the RAR is not successfully received within a specified period after sending the PRACH, the user terminal increases the transmission power of the PRACH and retransmits it (ST03).

[0109] If the wireless base station detects a PRACH sent from the user terminal, it sends a Random Access Response (RAR, also known as message 2) as a response (ST04). The wireless base station can inform the user terminal by including a portion of the uplink control channel configuration information used by the user terminal in sending the delivery confirmation signal for message 4 in message 2.

[0110] A portion of the uplink control channel configuration information can be set to information that determines the uplink control channel configuration information notified via system information for each user (e.g., information specifying a candidate from multiple candidates, or information notifying the offset relative to the basic structure, etc.). Additionally, a portion of the uplink control channel configuration information can also utilize a portion of the resource information specifying the transmission of message 3 in the existing LTE system.

[0111] Upon receiving the RAR, the user terminal adjusts the UL transmission timing based on the timing advance (TA) contained in the RAR and establishes UL synchronization. Furthermore, the user terminal transmits message 3 (ST05) using an uplink data channel (e.g., PUSCH) through the UL resources specified by the UL license contained in the RAR.

[0112] If message 3 is not properly received from the user terminal, the wireless base station resends a UL permission (ST06) to the user terminal to instruct the transmission of message 3. The user terminal, having received the UL permission for retransmission of message 3, retransmits message 3 (ST07). Furthermore, if the retransmitted UL permission contains a portion of uplink control channel configuration information (e.g., specification information), the user terminal updates to the uplink control channel configuration information contained in the most recently received UL permission.

[0113] The wireless base station sends message 4 (ST08) based on message 3 sent from the user terminal.

[0114] Based on the reception status of message 4, the user terminal sends a delivery acknowledgment signal (ACK or NACK) to the radio base station (ST11). The user terminal uses the uplink control channel structure and / or resources specified by the system information and the uplink control channel setting information contained in message 2 to send back the delivery acknowledgment signal. ST11 indicates whether the user terminal sends back NACK for message 4.

[0115] Even if the delivery acknowledgment signal for message 4 is determined to be NACK, the user terminal is still very likely to receive the system information and the uplink control channel setting information contained in message 2 appropriately. Therefore, even if the delivery acknowledgment signal for message 4 is NACK, the user terminal can still use the prescribed uplink control channel to send the NACK back to the radio base station, just like with ACK.

[0116] Upon receiving a NACK from the user terminal, the radio base station retransmits message 4 based on the NACK (ST09). The user terminal that appropriately received message 4 responds with an ACK using the uplink control channel structure and / or resources specified by the uplink control channel setting information contained in system information and message 2 (or, the UL permission for retransmission) (ST10). In this way, by controlling the transmission of the uplink control channel based on the uplink control channel setting information contained in system information and message 2, the user terminal can select the appropriate uplink control channel structure and / or resources even when multiple communication-supported uplink control channel structures and / or resources exist.

[0117] Furthermore, in the case of retransmitting message 4, the wireless base station can also include the uplink control channel configuration information (additional information) in the retransmitted message 4 to notify the user terminal. This allows for flexible control of the uplink control channel structure and / or resources.

[0118] <Using System Information + Message 4>

[0119] Figure 6 This represents another example of a wireless communication method including a random access procedure in the third method. Furthermore, descriptions of parts identical to the first or second method described above are omitted.

[0120] First, the user terminal receives broadcast signals and / or broadcast channels (system information) (ST01) transmitted from the wireless base station. The system information includes a portion of uplink control channel configuration information (e.g., common uplink control channel configuration information for user terminals). For example, the user terminal obtains candidates for multiple uplink control channel structures and / or resources configured for multiple user terminals from the system information. Alternatively, the user terminal obtains the basic structure (or default structure) of the uplink control channel structures and / or resources configured for multiple user terminals from the system information.

[0121] Next, the user terminal selects the specified preamble to send the PRACH (ST02). Furthermore, if the RAR is not successfully received within a specified period after sending the PRACH, the user terminal increases the transmission power of the PRACH and retransmits it (ST03).

[0122] If a PRACH message is detected from the user terminal, the wireless base station sends message 2 as a response (ST04).

[0123] Upon receiving the RAR, the user terminal adjusts the UL transmission timing based on the timing advance (TA) contained in the RAR and establishes UL synchronization. Furthermore, the user terminal transmits message 3 (ST05) using an uplink data channel (e.g., PUSCH) through the UL resources specified by the UL license contained in the RAR.

[0124] If message 3 is not properly received from the user terminal, the wireless base station resends a UL permission (ST06) to the user terminal to instruct the retransmission of message 3. The user terminal, having received the UL permission for retransmission of message 3, retransmits message 3 (ST07).

[0125] The wireless base station transmits message 4 (ST08) based on message 3 sent from the user terminal. Furthermore, the wireless base station notifies the user terminal by including a portion of the uplink control channel configuration information used by the user terminal in sending the delivery confirmation signal for message 4 (e.g., within the DL license) in message 4. This uplink control channel configuration information can be set to information that determines the uplink control channel configuration information notified via system information for each user (e.g., information specifying a candidate from multiple candidates, or information notifying the offset relative to the basic structure, etc.).

[0126] The wireless base station waits for a delivery confirmation signal from the user terminal that received message 4 within a specified period. If no ACK is detected from the user terminal within this specified period, the wireless base station determines that the user terminal has erroneously detected message 4 (NACK) and retransmits message 4 (ST09). Furthermore, the wireless base station can include the uplink control channel configuration information used by each user terminal in the retransmitted message 4 and notify the user terminal accordingly.

[0127] In addition, the uplink control channel configuration information contained in the initial message 4 sent by the user terminal and the uplink control channel configuration information contained in the retransmitted message 4 may be the same or different.

[0128] The user terminal that has appropriately received message 4 responds with an ACK (ST10) using the uplink control channel structure and / or resources specified by the system information and the uplink control channel configuration information contained in message 4. In this way, by controlling the transmission of the uplink control channel based on the system information and the uplink control channel configuration information contained in message 4, the user terminal can select the appropriate uplink control channel structure and / or resources even when multiple uplink control channel structures and / or resources supported by the communication exist.

[0129] (Method 4)

[0130] In the fourth method, an example of uplink control channel configuration information (uplink control channel structure and / or resources) will be described. Although UL-centric and UL-only uplink control channels are shown in the following description, this embodiment can also be applied to DL-centric uplink control channels.

[0131] The uplink control channel configuration information includes information related to the presence or absence of frequency hopping for the uplink control channel and / or its configuration position. Information related to the configuration position includes the RB index (the start position of the uplink control channel and / or the number of configured RBs) and / or the configuration position in the time domain (e.g., the start symbol index within a time slot).

[0132] In addition, if the number of RBs configured is predetermined (e.g., 1 RB) and frequency hopping is applied, the RB frequency hopping interval can be included in the uplink control channel setting information instead of the configured number of RBs.

[0133] Alternatively, the uplink control channel configuration information can include an index for the combination of cyclic shift (CS) and orthogonal codes applied to the uplink control channel. For example, a table specifying multiple candidate combinations of cyclic shift and orthogonal codes can be predefined, and information (index) specifying the candidate from the multiple candidate combinations can be included in the uplink control channel configuration information.

[0134] Alternatively, information for specifying the transmission timing (specifying time slots) of the uplink control channel from DL reception (e.g., receiving symbols from the downlink control channel) and / or the number of time slots used in transmission can be included in the uplink control channel setting information.

[0135] Figure 7 This indicates that the presence or absence of frequency hopping, the RB start index, the RB hopping interval (or the number of RBs), and the start symbol index are included in the uplink control channel configuration information as information for determining multiple uplink control channel structures and / or resources. The wireless base station notifies the user terminal of these parameters, and the user terminal determines the uplink control channel structure and / or resources based on the notified parameters.

[0136] exist Figure 7In this configuration, when frequency hopping is applied, the RB hopping interval is included in the uplink control channel configuration information; when frequency hopping is not applied, the number of RBs used in the uplink control channel is included in the uplink control channel configuration information. In this case, the RB hopping interval and the number of RBs can be set to the same bit field, and the user terminal can determine whether frequency hopping is present by reading the bit value of this bit field. Therefore, even in uplink control channel structures that support frequency hopping and those that do not, the increase in the amount of information (bits) contained in the uplink control channel configuration information can be suppressed.

[0137] In addition, the configuration information for the uplink control channel is not limited to... Figure 7 The example shown can be modified appropriately.

[0138] (Wireless Communication System)

[0139] The structure of a wireless communication system according to one embodiment of the present invention will be described below. In this wireless communication system, communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present invention.

[0140] Figure 8 This is a diagram illustrating an example of the general structure of a wireless communication system according to an embodiment of the present invention. In the wireless communication system 1, carrier aggregation (CA) and / or dual connectivity (DC) can be applied, which integrates multiple basic frequency blocks (component carriers) in units of the system bandwidth of an LTE system (e.g., 20MHz).

[0141] In addition, wireless communication system 1 can also be called LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., and can also be called the system that implements these.

[0142] The wireless communication system 1 includes a wireless base station 11 and wireless base stations 12 (12a-12c). The wireless base station 11 forms a macro cell C1 with a relatively wide coverage area, while the wireless base station 12 is configured within the macro cell C1 to form a small cell C2 with a narrower coverage area than the macro cell C1. In addition, user terminals 20 are configured in the macro cell C1 and each small cell C2.

[0143] User terminal 20 can connect to both wireless base station 11 and wireless base station 12. It is envisioned that user terminal 20 simultaneously uses macro cell C1 and small cell C2 via CA or DC. Furthermore, user terminal 20 can use multiple cells (CCs) (e.g., fewer than 5 CCs, more than 6 CCs) to apply CA or DC.

[0144] User terminal 20 and wireless base station 11 can communicate using a narrow-bandwidth carrier (also referred to as a legacy carrier, etc.) in a relatively low frequency band (e.g., 2 GHz). On the other hand, user terminal 20 and wireless base station 12 can communicate using a wide-bandwidth carrier in a relatively high frequency band (e.g., 3.5 GHz, 5 GHz, etc.), or they can use the same carrier as with wireless base station 11. Furthermore, the frequency band structure utilized by each wireless base station is not limited to this.

[0145] Wireless base station 11 and wireless base station 12 (or two wireless base stations 12) can be configured to establish a wired connection (e.g., fiber optic cable, X2 interface, etc., conforming to CPRI (Common Public Radio Interface)) or a wireless connection.

[0146] Wireless base station 11 and each wireless base station 12 are connected to the host station device 30, and are connected to the core network 40 via the host station device 30. The host station device 30 may include, for example, an access gateway device, a radio network controller (RNC), and a mobility management entity (MME), but is not limited to these. Furthermore, each wireless base station 12 may be connected to the host station device 30 via wireless base station 11.

[0147] Additionally, wireless base station 11 is a wireless base station with a relatively wide coverage area, and can also be called a macro base station, aggregation node, eNB (eNodeB), or transmit / receive point. Furthermore, wireless base station 12 is a wireless base station with a localized coverage area, and can also be called a small base station, micro base station, pico base station, femtocell base station, HeNB (Home eNodeB), RRH (Remote Radio Head), or transmit / receive point. Hereinafter, without distinguishing between wireless base stations 11 and 12, they will be collectively referred to as wireless base station 10.

[0148] Each user terminal 20 is a terminal that supports various communication methods such as LTE and LTE-A, including not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).

[0149] In wireless communication system 1, as a wireless access method, Orthogonal Frequency Division Multiple Access (OFDMA) is used in the downlink and Single Carrier Frequency Division Multiple Access (SC-FDMA) is used in the uplink.

[0150] OFDMA is a multi-carrier transmission method that divides the frequency band into multiple narrow frequency bands (subcarriers) and maps data to each subcarrier for communication. SD-FDMA is a single-carrier transmission method that divides the system bandwidth into bands consisting of one or more consecutive resource blocks for each terminal, and multiple terminals reduce inter-terminal interference by using different bands. Furthermore, the uplink and downlink wireless access methods are not limited to combinations of these; other wireless access methods can also be used.

[0151] In the wireless communication system 1, the downlink channels utilize shared downlink channels (Physical Downlink Shared Channel (PDSCH)), broadcast channels (Physical Broadcast Channel (PBCH)), and downlink L1 / L2 control channels shared by all user terminals 20. User data, higher-layer control information, and SIBs (System Information Blocks) are transmitted via the PDSCH. Furthermore, the MIB (Master Information Block) is transmitted via the PBCH.

[0152] Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), and PHICH (Physical Hybrid-ARQ Indicator Channel). PDCCH transmits downlink control information (DCI: Downlink Control Information) containing scheduling information for PDSCH and PUSCH. PCFICH transmits the number of OFDM symbols used in PDCCH. PHICH transmits delivery confirmation information (e.g., also called retransmission control information, HARQ-ACK, ACK / NACK, etc.) for HARQ (Hybrid Automatic Repeat reQuest) requests to PUSCH. EPDCCH is frequency-division multiplexed with PDSCH (Downlink Shared Data Channel) and is used for transmission of DCI, etc., just like PDCCH.

[0153] In the wireless communication system 1, the uplink channels utilize shared uplink channels (Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), and Physical Random Access Channel (PRACH)) shared by all user terminals 20. User data or higher-layer control information is transmitted via the PUSCH. Furthermore, downlink radio quality information (Channel Quality Indicator (CQI)) and delivery confirmation information are transmitted via the PUCCH. The random access preamble used to establish a connection with the cell is transmitted via the PRACH.

[0154] In wireless communication system 1, cell-specific reference signals (CRS), channel state information-reference signals (CSI-RS), demodulation reference signals (DMRS), and positioning reference signals (PRS) are transmitted as downlink reference signals. Furthermore, in wireless communication system 1, measurement reference signals (sounding reference signals (SRS)) and demodulation reference signals (DMRS) are transmitted as uplink reference signals. Additionally, DMRS can also be referred to as user terminal-specific reference signals (UE-specific reference signals). Moreover, the transmitted reference signals are not limited to these.

[0155] (Wireless base station)

[0156] Figure 9 This diagram illustrates an example of the overall structure of a wireless base station according to an embodiment of the present invention. The wireless base station 10 includes multiple transmit / receive antennas 101, an amplifier unit 102, a transmit / receive unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106. Furthermore, the transmit / receive antennas 101, the amplifier unit 102, and the transmit / receive unit 103 may each be configured to include one or more.

[0157] Regarding user data transmitted from wireless base station 10 to user terminal 20 via downlink, it is input from host device 30 to baseband signal processing unit 104 via transmission path interface 106.

[0158] In the baseband signal processing unit 104, user data undergoes various processing steps, including PDCP (Packet Data Convergence Protocol) layer processing, user data segmentation / combination, RLC (Radio Link Control) retransmission control, MAC (Medium Access Control) retransmission control (e.g., HARQ transmission processing), scheduling, transmission format selection, channel coding, Inverse Fast Fourier Transform (IFFT) processing, and precoding, before being forwarded to the transmit / receive unit 103. Similarly, downlink control signals also undergo channel coding or IFFT processing before being forwarded to the transmit / receive unit 103.

[0159] The transmit / receive unit 103 converts the baseband signal output from the baseband signal processing unit 104, which is pre-coded for each antenna, into a wireless frequency band and transmits it. The wireless frequency signal, after frequency conversion in the transmit / receive unit 103, is amplified by the amplifier unit 102 and transmitted from the transmit / receive antenna 101. The transmit / receive unit 103 can be constructed from a transmitter / receiver, a transmit / receive circuit, or a transmit / receive device, as described in the art in question. Alternatively, the transmit / receive unit 103 can be configured as a single unit or as a separate unit comprising a transmit unit and a receive unit.

[0160] On the other hand, regarding the uplink signal, the radio frequency signal received in the transmit / receive antenna 101 is amplified in the amplifier unit 102. The transmit / receive unit 103 receives the uplink signal amplified in the amplifier unit 102. The transmit / receive unit 103 converts the received signal frequency into a baseband signal and outputs it to the baseband signal processing unit 104.

[0161] In the baseband signal processing unit 104, the user data contained in the input uplink signal undergoes Fast Fourier Transform (FFT), Inverse Discrete Fourier Transform (IDFT), error correction decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing, and is forwarded to the host device 30 via the transmission path interface 106. The call processing unit 105 performs call processing such as setting or releasing communication channels, or status management or radio resource management of the wireless base station 10.

[0162] The transmission path interface 106 transmits and receives signals with the host station device 30 via a designated interface. Furthermore, the transmission path interface 106 can transmit and receive signals (backhaul signaling) with other wireless base stations 10 via an inter-base station interface (e.g., a fiber optic or X2 interface conforming to CPRI (Common Public Radio Interface)).

[0163] The transmitting / receiving unit 103 transmits broadcast signals and / or broadcast channels (e.g., system information), RAR in random access (e.g., message 2), and contention resolution messages (e.g., message 4). Furthermore, the transmitting / receiving unit 103 transmits uplink control channel configuration information. Additionally, the transmitting / receiving unit 103 receives PRACH (message 1) and message 3 in random access. Furthermore, the transmitting / receiving unit 103 receives a delivery acknowledgment signal for message 4.

[0164] Figure 10 This diagram illustrates an example of the functional structure of a wireless base station according to an embodiment of the present invention. Furthermore, in this example, only the functional blocks of the characteristic portions of this embodiment are shown; however, the wireless base station 10 may also have other functional blocks necessary for wireless communication.

[0165] The baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmit signal generation unit 302, a mapping unit 303, a receive signal processing unit 304, and a measurement unit 305. Furthermore, these structures only need to be included in the wireless base station 10, or some or all of the structures may not be included in the baseband signal processing unit 104.

[0166] The control unit (dispatcher) 301 implements overall control of the wireless base station 10. The control unit 301 can be constructed from a controller, control circuit, or control device based on common knowledge in the technical field of this invention.

[0167] Control unit 301 controls, for example, the generation of signals by signal generation unit 302 or the distribution of signals by mapping unit 303. Furthermore, control unit 301 controls the reception and processing of signals by signal processing unit 304 or the measurement of signals by measurement unit 305.

[0168] Control unit 301 controls the scheduling (e.g., resource allocation) of system information, downlink data signals transmitted in PDSCH, and downlink control signals transmitted in PDCCH and / or EPDCCH. Furthermore, control unit 301 controls the generation of downlink control signals (e.g., delivery confirmation messages) or downlink data signals based on a determination of whether retransmission control of uplink data signals is required. Additionally, control unit 301 controls the scheduling of synchronization signals (e.g., PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)) or downlink reference signals such as CRS, CSI-RS, and DMRS.

[0169] In addition, the control unit 301 controls the scheduling of uplink data signals transmitted in the PUSCH, uplink control signals (e.g., delivery confirmation messages) transmitted in the PUCCH and / or PUSCH, RACH preambles or uplink reference signals transmitted in the PRACH, etc.

[0170] Control unit 301 controls the random access process described in methods 1 to 4 above. Control unit 301 performs control to notify the user terminal of the uplink control channel configuration information, for example, using message 2 or message 4.

[0171] The transmit signal generation unit 302 generates downlink signals (downlink control signals, downlink data signals, downlink reference signals, etc.) based on instructions from the control unit 301 and outputs them to the mapping unit 303. The transmit signal generation unit 302 can be configured as a signal generator, signal generation circuit, or signal generation device based on common knowledge in the art to which this invention relates.

[0172] The transmitting signal generation unit 302 generates, for example, a DL allocation for notifying downlink signal allocation information and a UL permission for notifying uplink signal allocation information based on instructions from the control unit 301. Furthermore, it performs encoding and modulation processing on the downlink data signal according to the coding rate and modulation scheme determined based on channel state information (CSI) from each user terminal 20.

[0173] The mapping unit 303, based on instructions from the control unit 301, maps the downlink signal generated in the transmission signal generation unit 302 to a specified radio resource and outputs it to the transmission and reception unit 103. The mapping unit 303 can be configured as a mapper, mapping circuit, or mapping device based on common knowledge in the art to which this invention relates.

[0174] The receive signal processing unit 304 performs receive processing (e.g., demapping, demodulation, decoding, etc.) on the received signal input from the transmit / receive unit 103. Here, the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20. The receive signal processing unit 304 can be configured as a signal processor, signal processing circuit, or signal processing apparatus based on common knowledge in the art to which this invention relates.

[0175] The receiving signal processing unit 304 outputs the information decoded through receiving processing to the control unit 301. For example, if a PUCCH containing HARQ-ACK is received, the HARQ-ACK is output to the control unit 301. Furthermore, the receiving signal processing unit 304 outputs the received signal or the received processed signal to the measurement unit 305.

[0176] The measurement unit 305 performs measurements related to the received signal. The measurement unit 305 can be configured as a measuring instrument, measuring circuit, or measuring device based on common knowledge in the technical field of this invention.

[0177] The measurement unit 305 can perform measurements based on, for example, the received power of the received signal (e.g., RSRP (Reference Signal Received Power)), the received quality (e.g., RSRQ (Reference Signal Received Quality)), SINR (Signal to Interference Plus Noise Ratio)), or the channel state. The measurement results can be output to the control unit 301.

[0178] (User terminal)

[0179] Figure 11 This diagram illustrates an example of the overall structure of a user terminal according to an embodiment of the present invention. The user terminal 20 includes multiple transmit / receive antennas 201, an amplifier unit 202, a transmit / receive unit 203, a baseband signal processing unit 204, and an application unit 205. Furthermore, the transmit / receive antennas 201, the amplifier unit 202, and the transmit / receive unit 203 can each be configured to include one or more.

[0180] The radio frequency signal received in the transmit / receive antenna 201 is amplified in the amplifier unit 202. The transmit / receive unit 203 receives the downlink signal amplified in the amplifier unit 202. The transmit / receive unit 203 converts the received signal frequency into a baseband signal and outputs it to the baseband signal processing unit 204. The transmit / receive unit 203 can be configured as a transmitter / receiver, transmit / receive circuit, or transmit / receive device based on common knowledge in the art field of this invention. Alternatively, the transmit / receive unit 203 can be configured as a single unit or as a combination of a transmit unit and a receive unit.

[0181] The baseband signal processing unit 204 performs FFT processing, error correction decoding, and retransmission control on the input baseband signal. Downlink user data is forwarded to the application unit 205. The application unit 205 performs processing related to layers higher than the physical or MAC layers. Furthermore, broadcast information in the downlink data is also forwarded to the application unit 205.

[0182] On the other hand, regarding uplink user data, it is input from application unit 205 to baseband signal processing unit 204. In baseband signal processing unit 204, retransmission control (e.g., HARQ transmission processing) or channel coding, precoding, Discrete Fourier Transform (DFT), IFFT processing, etc., are performed, and the data is then forwarded to transmit / receive unit 203. Transmit / receive unit 203 converts the baseband signal output from baseband signal processing unit 204 into a radio frequency band and transmits it. The radio frequency signal frequency-converted in transmit / receive unit 203 is amplified by amplifier unit 202 and transmitted from transmit / receive antenna 201.

[0183] Additionally, the transmitting / receiving unit 203 transmits PRACH (message 1) and message 3 in random access. Furthermore, the transmitting / receiving unit 103 transmits a delivery confirmation signal for message 4. Additionally, the transmitting / receiving unit 203 receives broadcast signals and / or broadcast channels (e.g., system information), RAR (message 2) in random access, and message 4. Furthermore, the transmitting / receiving unit 203 can receive uplink control channel configuration information commonly configured for the user terminal via system information, and receive uplink control channel configuration information individually configured for the user terminal via message 2 or message 4 (see reference). Figure 5 ).

[0184] Figure 12 This diagram illustrates an example of the functional structure of a user terminal according to an embodiment of the present invention. Furthermore, in this example, only the functional blocks of the characteristic portions of this embodiment are shown; however, the user terminal 20 may also have other functional blocks required for wireless communication.

[0185] The baseband signal processing unit 204 of the user terminal 20 includes at least a control unit 401, a transmit signal generation unit 402, a mapping unit 403, a receive signal processing unit 404, and a measurement unit 405. Furthermore, these structures only need to be included in the user terminal 20, or some or all of their structures may not be included in the baseband signal processing unit 204.

[0186] The control unit 401 performs overall control of the user terminal 20. The control unit 401 can be composed of a controller, control circuit, or control device based on common knowledge in the technical field of this invention.

[0187] The control unit 401 controls, for example, the generation of signals by the transmitting signal generation unit 402 or the distribution of signals by the mapping unit 403. Furthermore, the control unit 401 controls the receiving and processing of signals by the receiving signal processing unit 404 or the measurement of signals by the measurement unit 405.

[0188] The control unit 401 obtains downlink control signals (signals transmitted in the PDCCH / EPDCCH) and downlink data signals (signals transmitted in the PDSCH) transmitted from the wireless base station 10 from the receiving signal processing unit 404. Based on the downlink control signals or the result of determining whether retransmission control of the downlink data signals is required, the control unit 401 controls the generation of uplink control signals (e.g., delivery confirmation information, etc.) or uplink data signals.

[0189] Control unit 401 controls the transmission of a delivery acknowledgment signal for a contention resolution message (e.g., message 4). For example, control unit 401 controls the transmission of the delivery acknowledgment signal using specified uplink control channel resources, based at least on the uplink control channel configuration information contained in the response signal to the random access preamble (e.g., message 2) or message 4 (see reference). Figure 3 , Figure 4 Furthermore, when uplink control channel setting information is supported via message 4, control unit 401 can control the transmission so that the delivery acknowledgment signal is not transmitted when the delivery acknowledgment signal is NACK.

[0190] Furthermore, when uplink control channel configuration information is supported via message 2, control unit 401 can control the transmission of a delivery confirmation signal based on uplink control channel configuration information configured for at least a portion of the UL-permitted resource information contained in message 2. Additionally, the uplink control channel configuration information can be configured to include information related to the presence or absence of frequency hopping and / or allocation position of the uplink control channel (see [reference]). Figure 7 ).

[0191] The transmitting signal generation unit 402 generates uplink signals (uplink control signals, uplink data signals, uplink reference signals, etc.) based on instructions from the control unit 401, and outputs them to the mapping unit 403. The transmitting signal generation unit 402 can be composed of a signal generator, signal generation circuit, or signal generation device, as described based on common knowledge in the art to which this invention relates.

[0192] The transmit signal generation unit 402 generates, for example, an uplink control signal related to delivery confirmation information or channel state information (CSI) based on instructions from the control unit 401. Furthermore, the transmit signal generation unit 402 generates an uplink data signal based on instructions from the control unit 401. For example, if the downlink control signal notified from the wireless base station 10 includes a UL license, the transmit signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal.

[0193] The mapping unit 403 maps the uplink signal generated in the transmission signal generation unit 402 to radio resources based on instructions from the control unit 401, and then outputs it to the transmission and reception unit 203. The mapping unit 403 can be configured as a mapper, mapping circuit, or mapping device based on common knowledge in the art to which this invention relates.

[0194] The receiving signal processing unit 404 performs receiving processing (e.g., demapping, demodulation, decoding, etc.) on the received signal input from the transmitting / receiving unit 203. Here, the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the wireless base station 10. The receiving signal processing unit 404 can be configured as a signal processor, signal processing circuit, or signal processing apparatus based on common knowledge in the art to which this invention relates. Furthermore, the receiving signal processing unit 404 can constitute the receiving unit of this invention.

[0195] The receiving signal processing unit 404 outputs the information decoded through receiving processing to the control unit 401. For example, the receiving signal processing unit 404 outputs broadcast information, system information, RRC signaling, DCI, etc., to the control unit 401. Furthermore, the receiving signal processing unit 404 outputs the received signal or the received processed signal to the measurement unit 405.

[0196] The measurement unit 405 performs measurements related to the received signal. The measurement unit 405 can be composed of a measuring instrument, measuring circuit, or measuring device described based on common knowledge in the technical field of this invention.

[0197] The measurement unit 405 can measure, for example, the received power (e.g., RSRP), received quality (e.g., RSRQ, received SINR), or channel state of the received signal. The measurement results can be output to the control unit 401.

[0198] (Hardware Structure)

[0199] Furthermore, the block diagrams used in the above description of the embodiments represent functional units. These functional blocks (structural parts) are implemented through any combination of hardware and / or software. Moreover, the means of implementing each functional block are not particularly limited. That is, each functional block can be implemented by a single device that is physically and / or logically combined, or by directly and / or indirectly (e.g., wired and / or wirelessly) connecting two or more physically and / or logically separate devices, and implemented by these multiple devices.

[0200] For example, in one embodiment of the present invention, the wireless base station, user terminal, etc., can function as a computer for processing the wireless communication method of the present invention. Figure 13 This is a diagram illustrating an example of the hardware structure of a wireless base station and a user terminal according to an embodiment of the present invention. The wireless base station 10 and the user terminal 20 described above can be configured as a computer device that physically includes a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0201] Additionally, in the following description, the term "device" can be read as circuit, device, unit, etc. The hardware structure of the wireless base station 10 and the user terminal 20 may include one or more of the devices shown in the figures, or it may not include some of the devices.

[0202] For example, although only one processor 1001 is illustrated, multiple processors may exist. Furthermore, processing can be executed on one processor, simultaneously, sequentially, or through other methods on more than one processor. Additionally, processor 1001 can be implemented using more than one chip.

[0203] The functions of the wireless base station 10 and the user terminal 20 are implemented, for example, by reading the prescribed software (program) on the hardware such as the processor 1001 and the memory 1002, the processor 1001 performing calculations and controlling the communication of the communication device 1004, or reading and / or writing data in the memory 1002 and the storage device 1003.

[0204] The processor 1001 enables the operating system to operate and control the computer as a whole. The processor 1001 may be composed of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic devices, registers, etc. For example, the baseband signal processing unit 104 (204) and call processing unit 105 described above can be implemented by the processor 1001.

[0205] Furthermore, the processor 1001 reads programs (program code), software modules, data, etc., from the storage 1003 and / or the communication device 1004 into the memory 1002, and performs various processes accordingly. As a program, a program is used that causes the computer to perform at least a portion of the operations described in the above embodiments. For example, the control unit 401 of the user terminal 20 can be implemented by a control program stored in the memory 1002 and operated in the processor 1001; other functional blocks can also be implemented similarly.

[0206] The memory 1002 is a computer-readable recording medium, and may be constituted by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronic EPROM), RAM (Random Access Memory), or other suitable storage media. The memory 1002 may also be referred to as a register, cache, main memory (main storage device), etc. The memory 1002 can store executable programs (program code), software modules, etc., for implementing the wireless communication method according to an embodiment of the present invention.

[0207] Storage 1003 is a computer-readable recording medium, which may be constituted by at least one of the following: flexible disk, floppy disk (registered trademark), optical disk (e.g., compact disc (CD-ROM), digital multifunction disk, Blu-ray disc (registered trademark)), removable disk, hard disk, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. Storage 1003 may also be referred to as an auxiliary storage device.

[0208] The communication device 1004 is hardware (transmitting and receiving device) used for communication between computers via wired and / or wireless networks. It may be referred to as a network device, network controller, network interface card (NIC), communication module, etc. For example, to implement Frequency Division Duplex (FDD) and / or Time Division Duplex (TDD), the communication device 1004 may be configured to include a high-frequency switch, duplexer, filter, frequency synthesizer, etc. For example, the aforementioned transmit / receive antenna 101 (201), amplifier unit 102 (202), transmit / receive unit 103 (203), transmission path interface 106, etc., can be implemented using the communication device 1004.

[0209] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED (light-emitting diode) lamp, etc.). Alternatively, input device 1005 and output device 1006 can also be an integrated structure (e.g., touch screen).

[0210] Furthermore, the processor 1001, memory 1002, and other devices are connected via a bus 1007 for communicating information. The bus 1007 can consist of a single bus or different buses between devices.

[0211] Furthermore, the wireless base station 10 and the user terminal 20 can be configured as hardware including microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays), etc., and can also implement some or all of the functional blocks through such hardware. For example, the processor 1001 can be implemented using at least one of these hardware components.

[0212] (Modified Example)

[0213] Furthermore, the terms used in this specification and / or those necessary for understanding this specification may be replaced with terms having the same or similar meanings. For example, a channel and / or symbol may be a signal (signaling). Additionally, a signal may also be a message. A reference signal can be simply referred to as RS (Reference Signal), and depending on the applied standard, it may also be called a pilot, pilot signal, etc. Furthermore, a component carrier (CC) may also be referred to as a cell, frequency carrier, carrier frequency, etc.

[0214] Furthermore, a radio frame can be composed of one or more periods (frames) in the time domain. Each of these periods (frames) constituting a radio frame can be called a subframe. Further, a subframe can be composed of one or more time slots in the time domain. A subframe can also be a fixed time length (e.g., 1 ms) independent of the parameter set.

[0215] Furthermore, a time slot in the time domain can consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbols, etc.). Additionally, a time slot can be a time unit based on a parameter set. Furthermore, a time slot can contain multiple mini-time slots. Each mini-time slot in the time domain can also consist of one or more symbols. Moreover, a mini-time slot can also be called a sub-time slot.

[0216] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can also use other names corresponding to their respective components. For example, a subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is, a subframe and / or TTI can be a subframe in existing LTE (1ms), a period shorter than 1ms (e.g., symbols 1-13), or a period longer than 1ms. In addition to subframes, units representing TTI can also be called time slots, mini-time slots, etc.

[0217] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules the allocation of radio resources (frequency bandwidth, transmit power, etc. available to each user terminal) in TTI units to each user terminal. However, the definition of TTI is not limited to this.

[0218] TTI can also be the transmission time unit for channel-coded data packets (transmission blocks), code blocks, and / or codewords, or it can be a processing unit for scheduling, link adaptation, etc. Furthermore, when a TTI is provided, the actual time interval (e.g., the number of symbols) for mapping transmission blocks, code blocks, and / or codewords can be shorter than the TTI.

[0219] Additionally, where a time slot or a mini-time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini-time slot) can be the minimum time unit for scheduling. Furthermore, the number of time slots (the number of mini-time slots) constituting the minimum time unit of the schedule can also be controlled.

[0220] A TTI with a duration of 1ms can be called a normal TTI (TTI in LTE Rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, or a long subframe, etc. A TTI shorter than a normal TTI can be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini slot, or a sub-slot, etc.

[0221] In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) can be read as a TTI with a duration of more than 1 ms, and a short TTI (e.g., a shortened TTI, etc.) can be read as a TTI with a duration of less than a long TTI but more than 1 ms.

[0222] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. Furthermore, in the time domain, an RB can also contain one or more symbols, and can be the length of a time slot, a mini-time slot, a subframe, or a TTI (Time Interval). A TTI and a subframe can each be composed of one or more resource blocks. Additionally, one or more RBs can be referred to as a Physical Resource Block (PRB), a Sub-Carrier Group (SCG), a Resource Element Group (REG), a PRB pair, an RB pair, etc.

[0223] Furthermore, a resource block can consist of one or more resource elements (REs). For example, an RE can be a radio resource area consisting of a subcarrier and a symbol.

[0224] Furthermore, the structures of radio frames, subframes, time slots, mini-time slots, and symbols described above are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc., can be varied in many ways.

[0225] Furthermore, the information and parameters described in this specification may be represented by absolute values, relative values ​​to specified values, or other corresponding information. For example, wireless resources may be indicated by specified indexes. Moreover, the mathematical formulas used for these parameters may differ from those explicitly stated in this specification.

[0226] The names used for parameters, etc., in this specification are not limiting in any way. For example, since various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are not limiting in any way.

[0227] The information, signals, etc., described in this specification can be represented using any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc., mentioned in the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination thereof.

[0228] Furthermore, information and signals can be output from higher layers to lower layers, and / or from lower layers to higher layers. Information and signals can also be input and output via multiple network nodes.

[0229] Input and output information, signals, etc., can be stored in a specific location (e.g., memory) or managed through a management table. Input and output information, signals, etc., can be overwritten, updated, or supplemented. Output information, signals, etc., can also be deleted. Input information, signals, etc., can also be sent to other devices.

[0230] The notification of information is not limited to the methods / implementations described in this specification, and may also be carried out by other methods. For example, the notification of information may be implemented through physical layer signaling (e.g., downlink control information (DCI), uplink control information (UCI)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling), other signals, or combinations thereof.

[0231] In addition, physical layer signaling can also be referred to as L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signals), L1 control information (L1 control signals), etc. Furthermore, RRC signaling can be referred to as RRC messages, or for example, RRC connection setup messages (RRCConnectionSetup) messages, RRC connection reconfiguration messages (RRCConnectionReconfiguration), etc. Additionally, MAC signaling can be communicated through, for example, MAC control elements (MAC CE (Control Element)).

[0232] Furthermore, the notification of the prescribed information (such as a "is X" notification) is not limited to being explicit, but can also be implicit (e.g., by not notifying the prescribed information or by notifying the information through other means).

[0233] The determination can be made based on a value represented by 1 bit (0, 1), or based on a boolean value representing true or false, or by comparing numerical values ​​(e.g., comparing with a specified value).

[0234] Regardless of whether software is called software, firmware, middleware, microcode, hardware description language, or any other name, it should be broadly interpreted as representing instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0235] Furthermore, software, commands, and information can be sent and received via transmission media. For example, when using wired technologies (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) etc.) and / or wireless technologies (infrared, microwave, etc.) to send software from a website, server, or other remote source, these wired and / or wireless technologies are included within the definition of transmission media.

[0236] The terms “system” and “network” are used interchangeably in this specification.

[0237] In this manual, the terms "base station (BS)," "wireless base station," "eNB," "gNB," "cell," "sector," "cell group," "carrier," and "component carrier" are used interchangeably. Base stations are also referred to by terms such as fixed station, NodeB, eNodeB (eNB), access point, transmitting point, receiving point, femtocell, and small cell.

[0238] A base station can accommodate one or more (e.g., three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The terms "cell" or "sector" refer to a portion or the entire coverage area of ​​the base station and / or base station subsystem providing communication services within that coverage area.

[0239] In this specification, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" are used interchangeably. Base stations are also referred to as fixed stations, NodeBs, eNodeBs (eNBs), access points, transmitting points, receiving points, femtocells, small cells, etc.

[0240] Mobile stations are also referred to by those skilled in the art as subscriber stations, mobile units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, mobile phones, user agents, mobile clients, clients, or other appropriate terms.

[0241] Furthermore, the term "wireless base station" in this specification can be replaced with "user terminal." For example, various methods / implementations of the present invention can be applied in a structure where communication between the wireless base station and the user terminal is replaced with communication between multiple user terminals (D2D: Device-to-Device). In this case, the user terminal 20 can be configured to have the functions of the wireless base station 10 described above. Additionally, terms such as "uplink" and "downlink" can be replaced with "side." For example, "uplink channel" can be replaced with "side channel."

[0242] Similarly, the user terminal in this specification can be replaced with a wireless base station. In this case, the wireless base station 10 can be configured to have the functions of the user terminal 20 described above.

[0243] In this specification, it is assumed that certain operations performed by a base station may also be performed by its upper node, depending on the circumstances. In a network consisting of one or more network nodes having a base station, it is obvious that various operations for communication with a terminal can be performed through the base station, one or more network nodes other than the base station (e.g., consider MME (Mobility Management Entity), S-GW (Serving-Gateway), etc., but are not limited to these), or combinations thereof.

[0244] The various methods / implementations described in this specification can be used individually, in combination, or switched as needed during execution. Furthermore, the processing procedures, timing sequences, flowcharts, etc., of the various methods / implementations described in this specification can be rearranged if there are no contradictions. For example, regarding the methods described in this specification, although various elements of the steps are shown in the illustrated order, the order is not limited to the specific order shown.

[0245] The methods / implementations described in this specification can be applied to the following systems: LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (Fourth Generation Mobile Communication System), 5G (Fifth Generation Mobile Communication System), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New Radio Access), FX (Next Generation Radio Access), GSM (Global System for Mobile Communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (Registered Trademark)), IEEE 802.16 (WiMAX (Registered Trademark)), IEEE 802.20, UWB (Ultra-Wideband), Bluetooth (Registered Trademark), systems utilizing other suitable wireless communication methods, and / or next-generation systems extended therefrom.

[0246] The use of the word "based on" in this specification, unless otherwise stated, does not mean "based on only". In other words, the use of the word "based on" means "based on only" and "based on at least".

[0247] Any reference to elements using the designations "first," "second," etc., as used in this specification does not entirely limit the quantity or order of these elements. These designations are used in this specification as a convenient way to distinguish between two or more elements. Therefore, references to the first and second elements do not imply that only two elements can be used, or that the first element must precede the second element in some form.

[0248] The term "determining" as used in this specification encompasses a wide variety of operations. For example, "determining" can refer to calculation, computation, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), and ascertaining. Furthermore, "determining" can also refer to receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, and accessing (e.g., accessing data in memory). Additionally, "determining" can refer to resolving, selecting, choosing, establishing, and comparing. In other words, "determining" can refer to various operations.

[0249] As used in this specification, the terms "connected," "coupled," or any variations thereof, mean any direct or indirect connection or coupling between two or more elements, including cases where there is one or more intermediate elements between the two mutually "connected" or "coupled" elements. The coupling or connection between elements can be physical, logical, or a combination of these. For example, "connected" can also be interpreted as "accessed." In the context of this specification, two elements can be considered as being "connected" or "coupled" to each other through the use of one or more wires, cables, and / or printed electrical connections. Furthermore, as non-limiting and non-exclusive examples, two elements can be considered as being "connected" or "coupled" to each other through the use of electromagnetic energy with wavelengths in the wireless frequency domain, microwave domain, and / or optical (both visible and invisible) domains.

[0250] Where the terms “including,” “comprising,” and variations thereof are used in this specification or claims, these terms, like the term “having,” indicate an inclusive meaning. Furthermore, the term “or” as used in this specification or claims does not imply a logical XOR.

[0251] The present invention has been described in detail above. It will be apparent to those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented with modifications and variations without departing from the spirit and scope defined by the claims. Therefore, the description in this specification is for illustrative purposes only and is not intended to be restrictive in any way.

[0252] This application is based on Japan Patent Application No. 2016-219019, filed on November 9, 2016. All of its contents are contained herein.

Claims

1. A terminal, characterized by comprising: have: The receiving unit receives: system information containing first information related to PUCCH resources, and downlink control information containing second information related to PUCCH resources and used for responding to random access preambles and for contention resolution during random access procedures. as well as The control unit, based on the first information related to PUCCH resources and the second information related to PUCCH resources, controls the transmission of uplink control information. The first information related to PUCCH resources is information concerning PUCCH resources commonly configured for the terminal, while the second information related to PUCCH resources is information concerning PUCCH resources individually configured for the terminal. The first information relating to PUCCH resources is the following: information related to frequency hopping and cyclic shift index.

2. The terminal according to claim 1, characterized in that, The downlink control information includes timing from the downlink shared channel until the acknowledgment signal is delivered.

3. The terminal according to claim 1 or claim 2, characterized in that, The uplink control information is HARQ-ACK information.

4. A wireless communication method of a terminal, the method comprising: have: The step of receiving system information containing first information related to PUCCH resources; The steps of receiving downlink control information containing second information related to PUCCH resources and used for at least one of a response message to a random access preamble and a contention resolution message during the random access procedure; and The steps for controlling the transmission of uplink control information based on the first information related to PUCCH resources and the second information related to PUCCH resources. The first information related to PUCCH resources is information concerning PUCCH resources commonly configured for the terminal, while the second information related to PUCCH resources is information concerning PUCCH resources individually configured for the terminal. The first information relating to PUCCH resources is the following: information related to frequency hopping and cyclic shift index.

5. A base station, characterized by have: The transmitting unit transmits at least one of system information containing first information related to PUCCH resources, and downlink control information containing second information related to PUCCH resources and used for responding to random access preambles and for contention resolution during random access procedures. as well as The control unit, based on the first information related to PUCCH resources and the second information related to PUCCH resources, instructs the terminal to transmit uplink control information. The first information related to PUCCH resources is information concerning PUCCH resources commonly configured for the terminal, while the second information related to PUCCH resources is information concerning PUCCH resources individually configured for the terminal. The first information relating to PUCCH resources is the following: information related to frequency hopping and cyclic shift index.

6. A system comprising a base station and a terminal, characterized in that, The base station has a transmitting unit that transmits system information containing first information related to PUCCH resources, and downlink control information containing second information related to PUCCH resources and used for at least one of a response message to a random access preamble and a contention resolution message during the random access process. The terminal has: The receiving unit receives system information containing the first information related to PUCCH resources, and downlink control information containing the second information related to PUCCH resources and used for at least one of a response message to a random access preamble and a contention resolution message during the random access process. as well as The control unit, based on the first information related to PUCCH resources and the second information related to PUCCH resources, controls the transmission of uplink control information. The first information related to PUCCH resources is information concerning PUCCH resources commonly configured for the terminal, while the second information related to PUCCH resources is information concerning PUCCH resources individually configured for the terminal. The first information relating to PUCCH resources is the following: information related to frequency hopping and cyclic shift index.

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