Terminal device and communication method

Abstract

In the present invention, an uplink grant is received, one or more MAC CEs and data from logical channels are multiplexed into a MAC PDU according to each priority, a MAC CE carrying information relating to HARQ-ACK is determined to have a higher priority than data from logical channels other than a common control channel, and the MAC CE carrying the information relating to HARQ-ACK is multiplexed into the MAC PDU.

Description

Terminal device and communication method

[0001] The present invention relates to a terminal device and a communication method. This application claims priority to Japanese Patent Application No. 2024-165733, filed in Japan on September 25, 2024, the contents of which are incorporated herein by reference.

[0002] The radio access method and radio network for cellular mobile communications (hereinafter referred to as "Long Term Evolution (LTE)" or "EUTRA: Evolved Universal Terrestrial Radio Access") is being standardized under the 3rd Generation Partnership Project (3GPP, registered trademark). In LTE, base station equipment is also called eNodeB (evolved NodeB), and terminal equipment is also called UE (User Equipment). LTE is a cellular communication system in which multiple base station devices are arranged in a cell-like structure to cover different areas. A single base station device may manage multiple serving cells.

[0003] 3GPP is currently considering and standardizing the next-generation standard (NR: New Radio) as the communication method for 5G. NR is required to meet the requirements of three scenarios within a single technological framework: eMBB (enhanced Mobile Broadband), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication).

[0004] 3GPP is planning discussions toward 6G (Non-Patent Document 1). The 6G Workshop is expected to include discussions on wireless access technologies such as access methods, waveforms, modulation schemes, frame structures, parameters such as subcarrier spacing and frequency, channel structures, coding schemes, and connection procedures.

[0005] "Additional Planning Details for 6G Workshop and 5G-Advancedin Rel-20", RP-241647, RAN Chair(Qualcomm), 3GPP TSG RAN Meeting #104, Shanghai, China, June 17th-20th, 2024

[0006] In LTE and NR, a separate physical channel for transmitting and receiving control information is specified for the uplink, in addition to the physical channel for transmitting and receiving data. However, it is desirable to reduce the complexity of implementation, testing, and operation. In this context, one aspect of the present invention provides a terminal device capable of efficiently transmitting and receiving control information, and a communication method used in said terminal device.

[0007] (1) In order to achieve the above objective, one aspect of the present invention employs the following means. Specifically, the first aspect of the present invention is a terminal device comprising a processor and a memory for storing computer program code, which receives an uplink grant and multiplexes data from one or more MAC CEs and logical channels to a MAC PDU according to their respective priorities, wherein the MAC CE carrying information about HARQ-ACK has a higher priority than data from logical channels other than the common control channel.

[0008] (2) Furthermore, the MAC CE that carries information about HARQ-ACK has a higher priority than the MAC CE that carries information about the buffer status report.

[0009] (3) Furthermore, the MAC CE that carries information about HARQ-ACK has a higher priority than the MAC CE that carries information about power headroom reports.

[0010] (4) Furthermore, the MAC CE carrying information about HARQ-ACK has a higher priority than the MAC CE carrying information about CSI.

[0011] (5) Furthermore, the MAC CE that carries information about HARQ-ACK has a lower priority than data from the common control channel.

[0012] (6) A second aspect of the present invention is a communication method used in a terminal device, comprising the steps of receiving an uplink grant and multiplexing one or more MAC CEs and data from logical channels to a MAC PDU according to their respective priorities, wherein the MAC CE carrying information about HARQ-ACK has a higher priority than data from logical channels other than the common control channel.

[0013] (7) Furthermore, the MAC CE that carries information about HARQ-ACK has a higher priority than the MAC CE that carries information about the buffer status report.

[0014] (8) Furthermore, the MAC CE carrying information about HARQ-ACK has a higher priority than the MAC CE carrying information about power headroom reports.

[0015] (9) Furthermore, the MAC CE carrying information about HARQ-ACK has a higher priority than the MAC CE carrying information about CSI.

[0016] (10) Furthermore, the MAC CE that carries information about HARQ-ACK has a lower priority than data from the common control channel.

[0017] According to this invention, information related to HARQ-ACK can be appropriately transmitted and received.

[0018] This is a conceptual diagram of a wireless communication system according to one aspect of this embodiment. This is a schematic diagram showing an example of a resource grid in a subframe according to one aspect of this embodiment. This is a schematic block diagram showing the configuration of a terminal device 1 according to one aspect of this embodiment. This is a schematic block diagram showing the configuration of a base station device 3 according to one aspect of this embodiment. Figure 5 is a diagram showing an example of processing related to MAC CE multiplexing including HARQ-ACK information according to one aspect of this embodiment.

[0019] The following describes this embodiment.

[0020] "A, and / or B" may be a term that includes "A", "B", or "A and B".

[0021] A parameter or piece of information may have one or more values, meaning that the parameter or information may include at least one parameter or piece of information that has those one or more values. A top-level parameter may be a single top-level parameter. A top-level parameter may be an information element (IE) that includes multiple parameters.

[0022] Figure 1 is a conceptual diagram of a wireless communication system according to one embodiment of this model. In Figure 1, the wireless communication system comprises terminal devices 1A to 1B and a base station device 3. Hereinafter, terminal devices 1A to 1B will also be referred to as terminal device 1 (UE).

[0023] The base station device 3 may be configured to include one or both of an MCG (Master Cell Group) and an SCG (Secondary Cell Group). An MCG is a group of serving cells comprising at least a PCell (Primary Cell). An SCG is a group of serving cells comprising at least a PSCell (Primary Secondary Cell). A PCell may be a serving cell given based on the initial connection. An MCG may be configured to include one or more SCells (Secondary Cells). An SCG may be configured to include one or more SCells. A serving cell identity is a short identifier for identifying a serving cell. A serving cell identity may be given by a higher-layer parameter.

[0024] In a wireless communication system, the terminal device 1 and the base station device 3 may use one or more communication methods. For example, in the downlink of the wireless communication system, CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplex) may be used. Also, in the uplink of the wireless communication system, either CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplex) may be used. Here, DFT-s-OFDM is a communication method in which transform precoding is applied prior to signal generation in CP-OFDM. Here, transform precoding is also referred to as DFT precoding.

[0025] As shown in FIG. 1, the base station device 3 may be composed of one transceiver device (or a transmission point, a transmission device, a reception point, a reception device, a transceiver point). On the other hand, in some cases, the base station device 3 may be configured to include a plurality of transceiver devices. When the base station device 3 is composed of a plurality of transceiver devices, each of the plurality of transceiver devices may be arranged at geographically different positions.

[0026] For a subcarrier spacing Δf with respect to a subcarrier spacing setting μ, Δf = 2 μ × 15 kHz may be used. For example, the subcarrier spacing setting μ may indicate any one of 0, 1, 2, 3, and 4.

[0027] Time unit (time unit) T ｃ = 1 / (Δf ｍａｘ × N ｆ ) may be used to represent the length in the time domain. Here, Δf ｍａｘ = 480 kHz may be used. Also, N ｆ = 4096 may be used. Also, the constant κ is κ = Δf ｍａｘ × N ｆ / (Δf ｒｅｆ N ｆ，ｒｅｆ) = 64 is also acceptable. Also, Δf ｒｅｆ The frequency may be 15 kHz. ｆ，ｒｅｆ The answer is 2048.

[0028] The transmission of downlink / uplink signals may be organized into radio frames (system frames, frames) of length Tf, where Tf = (Δfmax × Nf / 100) × Ts = 10 ms.

[0029] A wireless frame may consist of 10 subframes. Here, the length of a subframe may be Tsf = (Δfmax × Nf / 1000) × Ts = 1 ms. Also, the number of OFDM symbols per subframe may be Nsubframe, μsymb = Nslotsymb × Nsubframe, μslot.

[0030] OFDM symbols are used as time-domain units for communication methods used in wireless communication systems. For example, OFDM symbols may be used as time-domain units for CP-OFDM. Furthermore, OFDM symbols may be used as time-domain units for DFT-s-OFDM.

[0031] A slot may consist of multiple OFDM symbols. For example, one slot may consist of Nslotsymb consecutive OFDM symbols. For instance, in a normal CP setting, Nslotsymb = 14. In an extended CP setting, Nslotsymb = 12.

[0032] Slots may be indexed in the time domain. For example, slot index nμs may be given in ascending order as integer values ​​in the range of 0 to Nsubframe,μslot-1 in subframes. Also, slot index nμs,f may be given in ascending order as integer values ​​in the range of 0 to Nframe,μslot-1 in wireless frames.

[0033] Figure 2 shows an example of the configuration of a resource grid according to one aspect of this embodiment. In the resource grid of Figure 2, the horizontal axis is the OFDM symbol index lsym, and the vertical axis is the subcarrier index ksc. The resource grid of Figure 2 contains Nsize, μgrid, x × NRBsc subcarriers and Nsubframe, μsymb OFDM symbols. Here, Nsize, μgrid, and x represent the bandwidth of the SCS intrinsic carrier. The units of the values ​​of Nsize, μgrid, and x are resource blocks.

[0034] Within a resource grid, resources identified by the subcarrier index ksc and OFDM symbol index lsym are also referred to as resource elements (RE).

[0035] A Resource Block (RB) contains NRBsc consecutive subcarriers. The term "Resource Block" is a collective term for Common Resource Blocks, Physical Resource Blocks (PRBs), and Virtual Resource Blocks (VRBs). For example, NRBsc may be 12.

[0036] A BandWidth Part (BWP) may be configured as a subset of the resource grid. Here, a BWP configured for a downlink is also called a downlink BWP, and a BWP configured for an uplink is also called an uplink BWP.

[0037] The following describes an example of the configuration of a terminal device 1 according to one aspect of this embodiment.

[0038] Fig. 3 is a schematic block diagram showing the configuration of the terminal device 1 according to an aspect of the present embodiment. As shown in the figure, the terminal device 1 includes a wireless transmission / reception unit 10 and an upper layer processing unit 14. The wireless transmission / reception unit 10 is configured to include at least a part or all of an antenna unit 11, an RF (Radio Frequency) unit 12, and a baseband unit 13. The upper layer processing unit 14 is configured to include at least a part or all of a media access control layer processing unit 15 and a radio resource control layer processing unit 16. The wireless transmission / reception unit 10 is also referred to as a transmission unit, a reception unit, or a physical layer processing unit.

[0039] The wireless transmission / reception unit 10 performs physical layer processing.

[0040] For example, the wireless transmission / reception unit 10 may generate a baseband signal of an uplink physical channel. Here, a transport block delivered from an upper layer on an uplink shared channel may be arranged on the uplink physical channel. For example, the wireless transmission / reception unit 10 may generate a baseband signal of an uplink physical signal.

[0041] For example, the wireless transmission / reception unit 10 may attempt to detect information transmitted by a downlink physical channel. Here, a transport block among the information transmitted by the downlink physical channel may be delivered to an upper layer on a downlink shared channel. For example, the wireless transmission / reception unit 10 may attempt to detect information transmitted by a downlink physical signal.

[0042] The reception unit of the terminal device 1 receives a physical downlink control channel (PDCCH). The reception processing unit of the terminal device 1 performs processing of receiving PDCCH in a downlink frequency band (cell, component carrier, carrier). The reception processing unit of the terminal device 1 performs processing such as demodulation and decoding on the PDCCH. The reception unit processing of the terminal device 1 performs processing of receiving PDCCH and performs processing of detecting downlink control information (DCI format). The reception unit processing of the terminal device 1 decodes the information included in the detected DCI format and outputs the decoding result to each unit.

[0043] The receiving unit (receiving processing unit) of terminal device 1 receives the physical downlink shared channel (PDSCH). The receiving unit of terminal device 1 processes the PDSCH in the downlink frequency band (cell, component carrier, carrier). The receiving unit of terminal device 1 performs demodulation, decoding, and other processing on the PDSCH. The receiving unit of terminal device 1 receives MAC control elements (MAC CE) via the PDSCH. MAC CE refers to control information exchanged at the MAC layer level. The receiving unit of terminal device 1 decodes the information contained in the received MAC CE and outputs the decoded result to each unit. The receiving unit of terminal device 1 receives RRC signaling via the PDSCH. The receiving unit of terminal device 1 outputs the received RRC signaling to the upper layer processing unit 14.

[0044] The transmitting unit (also called the transmitting processing unit) of terminal device 1 transmits a HARQ-ACK (acknowledgment of receipt). The transmitting processing unit of terminal device 1 transmits a HARQ-ACK to the PDSCH. The transmitting processing unit of terminal device 1 transmits a HARQ-ACK in the uplink frequency band (cell, component carrier, carrier).

[0045] The upper layer processing unit 14 outputs the uplink data (transport block) generated by user operations, etc., to the wireless transceiver unit 10. The upper layer processing unit 14 performs processing at the MAC layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and RRC layer.

[0046] The media access control layer processing unit (MAC layer processing unit) 15, which is part of the upper layer processing unit 14, performs MAC layer processing.

[0047] The wireless resource control layer processing unit 16, located in the upper layer processing unit 14, performs RRC layer processing. The wireless resource control layer processing unit 16 manages various setting information / parameters (RRC parameters) of its own device. The wireless resource control layer processing unit 16 sets various setting information / parameters (RRC parameters) based on the upper layer signals received from the base station device 3. That is, the wireless resource control layer processing unit 16 sets various setting information / parameters (RRC parameters) based on information indicating the various setting information / parameters (RRC parameters) received from the base station device 3. Note that this setting information may include information related to the processing or setting of physical channels and physical signals (i.e., the physical layer), MAC layer, PDCP layer, RLC layer, and RRC layer. These parameters may also be upper layer parameters.

[0048] For example, the wireless resource control layer processing unit 16 may acquire RRC parameters contained in an RRC message on a certain logical channel and set the acquired RRC parameters in the memory area of ​​the terminal device 1. The RRC parameters set in the memory area of ​​the terminal device 1 may be provided to the lower layer.

[0049] The media access control layer processing unit (MAC layer processing unit) 15 performs MAC layer processing such as HARQ operations, MAC CE decoding, and processing based on the decoding results.

[0050] The wireless resource control layer processing unit 16 may include function information generated based on the functions of the terminal device 1 in the RRC message and transmit it to the base station device 3.

[0051] The wireless transceiver 10 performs modulation processing, encoding processing, and transmission processing. The wireless transceiver 10 generates a physical signal by encoding processing, modulation processing, and baseband signal generation processing (conversion to a time-continuous signal) of the data (transport block), and transmits it to the base station device 3 or the terminal device 1.

[0052] The wireless transceiver 10 performs demodulation, decoding, and reception processing. Based on the demodulation and decoding processing of the received physical signal, the wireless transceiver 10 outputs the transport block of the detected information to the upper layer processing unit 14 on the downlink shared channel (DL-SCH).

[0053] The RF unit 12 converts the signal received via the antenna unit 11 into a baseband signal (downconvert) and removes unwanted frequency components. The RF unit 12 outputs the baseband signal to the baseband unit 13.

[0054] The baseband unit 13 converts the analog signal input from the RF unit 12 into a digital signal. The baseband unit 13 removes the portion corresponding to the Cyclic Prefix (CP) from the converted digital signal. The baseband unit 13 performs a Fast Fourier Transform (FFT) on the signal from which the CP has been removed to extract the signal in the frequency domain.

[0055] The baseband unit 13 performs an inverse fast Fourier transform (IFFT) on the physical signal to generate an OFDM symbol. The baseband unit 13 adds a CP to the generated OFDM symbol to generate a baseband digital signal. The baseband unit 13 converts the baseband digital signal into an analog signal. The baseband unit 13 outputs the converted analog signal to the RF unit 12.

[0056] The RF unit 12 uses a low-pass filter to remove extraneous frequency components from the analog signal input from the baseband unit 13, upconverts the analog signal to the carrier frequency, and generates an RF signal. The RF unit 12 transmits the RF signal via the antenna unit 11. The RF unit 12 also amplifies power. The RF unit 12 may also have a function to control the transmission power. The RF unit 12 is also referred to as the transmission power control unit.

[0057] The following describes an example of the configuration of a base station device 3 according to one aspect of this embodiment.

[0058] Figure 4 is a schematic block diagram showing the configuration of a base station device 3 according to one aspect of this embodiment. As shown in the figure, the base station device 3 is composed of a wireless transceiver unit 30 and a higher layer processing unit 34. The wireless transceiver unit 30 is composed of an antenna unit 31, an RF (Radio Frequency) unit 32, and a baseband unit 33. The higher layer processing unit 34 is composed of a media access control layer processing unit 35 and a wireless resource control layer processing unit 36. The wireless transceiver unit 30 is also referred to as the transmitting unit, receiving unit, or physical layer processing unit.

[0059] The upper layer processing unit 34 performs processing for the MAC (Medium Access Control) layer, the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Radio Resource Control (RRC) layer. Here, the MAC layer is also called the MAC sublayer. The PDCP layer is also called the PDCP sublayer. The RLC layer is also called the RLC sublayer. The RRC layer is also called the RRC sublayer.

[0060] The media access control layer processing unit 35, provided in the upper layer processing unit 34, performs MAC layer processing. Here, MAC layer processing may include some or all of the following: mapping between logical channels and transport channels, multiplexing of one or more MAC SDUs (Service Data Units) into transport blocks, decomposition of transport blocks delivered from the physical layer on the UL-SCH into one or more MAC SDUs, application of HARQ (Hybrid Automatic Repeat reQuest) to transport blocks, and processing of scheduling requests.

[0061] The wireless resource control layer processing unit 36, located in the upper layer processing unit 34, performs RRC layer processing. RRC layer processing may include some or all of the following: management of broadcast signals, management of RRC connection / RRC idle status, and RRC reconfiguration. The wireless resource control layer processing unit 36 ​​generates or obtains downlink data (transport blocks), system information, RRC messages, MAC CE, etc., which are placed on the PDSCH, from the upper node, and outputs them to the wireless transceiver unit 30.

[0062] Furthermore, the wireless resource control layer processing unit 36 ​​manages various setting information / parameters (RRC parameters) for each terminal device 1. The wireless resource control layer processing unit 36 ​​may set various setting information / parameters for each terminal device 1 via signals from higher layers. That is, the wireless resource control layer processing unit 36 ​​transmits / announces information indicating various setting information / parameters. This setting information may include information related to the processing or setting of physical channels and physical signals (i.e., the physical layer), MAC layer, PDCP layer, RLC layer, and RRC layer. These parameters may also be higher layer parameters. For example, the wireless resource control layer processing unit 36 ​​may transmit RRC parameters to a terminal device 1 in an RRC message on a certain logical channel. Here, the RRC message may be mapped to one of BCCH (Broadcast Control Channel), CCCH (Common Control Channel), or DCCH (Dedicated Control Channel).

[0063] The wireless resource control layer processing unit 36 ​​may determine the RRC parameters to be transmitted to the terminal device 1 based on the RRC parameters contained in the RRC message transmitted from the terminal device 1. Here, the RRC message transmitted from the terminal device 1 may be related to the functional information report of the terminal device 1.

[0064] The media access control layer processing unit (MAC layer processing unit) 35 performs MAC layer processing such as HARQ operation and MAC CE generation.

[0065] The functions of the wireless transceiver 30 are the same as those of the wireless transceiver 10, so their explanation will be omitted as appropriate. The wireless transceiver 30 performs physical layer processing. Here, the physical layer processing may include some or all of the generation of baseband signals for physical channels, generation of baseband signals for physical signals, and detection of information transmitted by physical channels and detection of information transmitted by physical signals. The physical layer processing may also include mapping of transport channels to physical channels. Here, the baseband signal is also referred to as a time-continuous signal.

[0066] The wireless transceiver 30 may perform demodulation processing and / or decoding processing. The wireless transceiver 30 may deliver the transport block from the information detected based on the demodulation and decoding processing of the received physical signal to the upper layer on the UL-SCH. For example, the wireless transceiver 30 may generate the baseband signal of the downlink physical channel. Here, the transport block delivered from the upper layer on the DL-SCH may be placed on the downlink physical channel. For example, the wireless transceiver 30 may generate the baseband signal of the downlink physical signal.

[0067] The wireless transceiver 30 may perform some or all of the modulation, coding, and transmission processes. The wireless transceiver 30 may generate a physical signal based on some or all of the coding, modulation, and baseband signal generation processes for the transport block. The wireless transceiver 30 may place the physical signal on a BWP. The wireless transceiver 30 may transmit the generated physical signal. For example, the wireless transceiver 30 may attempt to detect information transmitted by the uplink physical channel. Here, the transport block of the information transmitted by the uplink physical channel may be delivered to a higher layer on the UL-SCH. For example, the wireless transceiver 30 may attempt to detect information transmitted by the uplink physical signal.

[0068] The receiving unit (also referred to as the receiving processing unit) of base station device 3 receives HARQ-ACKs. The receiving processing unit of base station device 3 receives HARQ-ACKs for PDSCHs. The receiving processing unit of base station device 3 receives HARQ-ACKs in the uplink frequency band (cell, component carrier, carrier). The receiving processing unit of base station device 3 receives HARQ-ACKs for PDSCHs in the downlink frequency band (cell, component carrier, carrier) managed by base station device 3.

[0069] The RF unit 32 may convert the signal received via the antenna unit 31 into a baseband signal and remove unwanted frequency components. The RF unit 32 outputs the baseband signal to the baseband unit 33.

[0070] The baseband unit 33 may digitize the baseband signal input from the RF unit 32. The baseband unit 33 may remove the portion corresponding to the Cyclic Prefix (CP) from the digitized baseband signal. The baseband unit 33 may perform a Fast Fourier Transform (FFT) on the baseband signal from which the CP has been removed to extract the signal in the frequency domain.

[0071] The baseband unit 33 may generate a baseband signal by performing an inverse fast Fourier transform (IFFT) on the physical signal. The baseband unit 33 may add a CP to the generated baseband signal. The baseband unit 33 may convert the baseband signal with the CP added into an analog. The baseband unit 33 may output the analogized baseband signal to the RF unit 32.

[0072] The RF unit 32 may remove extraneous frequency components from the baseband signal input from the baseband unit 33. The RF unit 32 may upconvert the baseband signal to the carrier frequency to generate an RF signal. The RF unit 32 may transmit the RF signal via the antenna unit 31. The RF unit 32 may also be equipped with a function to control the transmission power.

[0073] Each of the parts designated by reference numerals 10 to 16 in the terminal device 1 may be configured as a circuit. Each of the parts designated by reference numerals 30 to 36 in the base station device 3 may be configured as a circuit.

[0074] The following describes the physical channels and physical signals (physical signals) according to various aspects of this embodiment. A physical signal is a general term for downlink physical channels, downlink physical signals, uplink physical channels, and uplink physical channels. A physical channel is a general term for downlink physical channels and uplink physical channels. A physical signal is a general term for downlink physical signals and uplink physical signals.

[0075] An uplink physical channel may correspond to a set of resource elements that carry information generated in the upper layer. An uplink physical channel is a physical channel used in the uplink component carrier. An uplink physical channel may be transmitted by the wireless transceiver 10. An uplink physical channel may be received by the wireless transceiver 30. In a wireless communication system according to one aspect of this embodiment, at least some or all of the following uplink physical channels are used: • Physical uplink shared channel PUSCH • Physical random access channel PRACH

[0076] A physical uplink shared channel PUSCH may be transmitted to transmit uplink control information and / or a transport block. A PUSCH may be used to transmit uplink control information and / or a transport block. A PUSCH may be used to transmit at least some or all of a transport block, HARQ-ACK, and channel status information. A PUSCH may be used to transmit information not described above. Terminal device 1 may transmit a PUSCH containing uplink control information and / or a transport block. Base station device 3 may receive a PUSCH containing uplink control information and / or a transport block.

[0077] Uplink control information (uplink control information bits, uplink control information sequence, uplink control information type) includes some or all of the channel state information (CSI) and HARQ-ACK (Hybrid Automatic Repeat Request ACKnowledgement) information. Note that uplink control information may also include information not listed above.

[0078] Channel status information is also referred to as channel status information bits or channel status information sequences. HARQ-ACK information is also referred to as HARQ-ACK information bits or HARQ-ACK information sequences.

[0079] HARQ-ACK information may consist of HARQ-ACK bits corresponding to a single transport block (TB). HARQ-ACK bits may indicate an ACK (acknowledgement) or a NACK (negative-acknowledgement) corresponding to the transport block. An ACK may indicate that the transport block has been decoded successfully. A NACK may indicate that the transport block has not been decoded successfully. HARQ-ACK information may contain one or more HARQ-ACK bits.

[0080] HARQ-ACK for transport blocks is also referred to as HARQ-ACK for PDSCH. Here, "HARQ-ACK for PDSCH" may refer to HARQ-ACK for transport blocks included in PDSCH.

[0081] Channel status information may include some or all of the Channel Quality Indicator (CQI), Precoder Matrix Indicator (PMI), and Rank Indicator (RI). CQI is an indicator related to the quality of the propagation path (e.g., propagation intensity) or the quality of the physical channel, PMI is an indicator related to the precoder, and RI is an indicator related to the transmit rank (or transmit layer number).

[0082] Channel status information is an indicator of the reception status of the physical signal (e.g., CSI-RS) used for channel measurement. The value of the channel status information may be determined by terminal device 1 based on the reception status assumed by the physical signal used for channel measurement. Channel measurement may include interference measurement.

[0083] The physical random access channel PRACH may be transmitted to transmit the index of the random access preamble (random access message 1). Terminal device 1 may transmit PRACH. Base station device 3 may receive PRACH. Terminal device 1 may transmit the random access preamble over PRACH. Base station device 3 may receive the random access preamble over PRACH.

[0084] PRACH is used at least to send a random access preamble (random access message 1). PRACH may also be used at least to indicate some or all of the initial connection establishment procedure, handover procedure, connection re-establishment procedure, synchronization (timing adjustment) for sending PUSCH, and resource requests for PUSCH.

[0085] Uplink physical signals may correspond to a set of resource elements. Uplink physical signals do not necessarily have to be used to transmit information generated in higher layers. However, uplink physical signals may be used to transmit information generated in the physical layer. Uplink physical signals may also be physical signals used in the uplink component carrier. Wireless transceiver 10 may transmit uplink physical signals. Wireless transceiver 30 may receive uplink physical signals. In the uplink of a wireless communication system according to one aspect of this embodiment, some or all of the following uplink physical signals may be used: Uplink Demodulation Reference Signal (UL DMRS), Sounding Reference Signal (SRS), and Uplink Phase Tracking Reference Signal (UL PTRS).

[0086] The uplink demodulation reference signal UL DMRS is a general term for DMRS for PUSCH.

[0087] The set of antenna ports for a DMRS for a PUSCH (DMRS associated with a PUSCH, DMRS included in a PUSCH, and DMRS corresponding to a PUSCH) may be given based on the set of antenna ports for the PUSCH. For example, the set of antenna ports for a DMRS for a PUSCH may be the same as the set of antenna ports for the PUSCH.

[0088] The propagation path of a pusher may be estimated from the DMRS for that pusher.

[0089] A downlink physical channel may correspond to a set of resource elements that transmit information generated in the upper layer. A downlink physical channel may also be a physical channel used in a downlink component carrier. The wireless transceiver 30 may transmit a downlink physical channel. The wireless transceiver 10 may receive a downlink physical channel. In the downlink of a wireless communication system according to one aspect of this embodiment, some or all of the following downlink physical channels may be used: • Physical Broadcast Channel (PBCH) • Physical Downlink Control Channel (PDCCH) • Physical Downlink Shared Channel (PDSCH)

[0090] The physical broadcast channel (PBCH) transmits either or both the Master Information Block (MIB) and / or physical layer control information. Here, physical layer control information is information generated at the physical layer. The MIB is an RRC message delivered from a higher layer over the Broadcast Control Channel (BCCH).

[0091] A PDCCH is used at least for transmitting Downlink Control Information (DCI). Downlink Control Information may be placed on the PDCCH. Terminal device 1 may receive a PDCCH containing Downlink Control Information. Base station device 3 may transmit a PDCCH containing Downlink Control Information.

[0092] Downlink control information may be transmitted in DCI format. The DCI format may be interpreted as the format of the downlink control information. Alternatively, the DCI format may be interpreted as a set of downlink control information set in a specific downlink control information format.

[0093] The base station device 3 may notify the terminal device 1 of downlink control information using a PDCCH with DCI format. Here, the terminal device 1 may monitor the PDCCH to obtain downlink control information. Unless otherwise specified, the DCI format and downlink control information may be described as equivalent. For example, the base station device 3 may transmit the downlink control information to the terminal device 1 in DCI format. Alternatively, the terminal device 1 may control the wireless transceiver 10 using the downlink control information contained in the detected DCI format.

[0094] Downlink control information may include at least one of either a downlink grant (DL grant) or an uplink grant (UL grant). The DCI format used for scheduling PDSCH is also called the downlink DCI format. The DCI format used for scheduling PUSCH is also called the uplink DCI format. Downlink grants are also called downlink assignments (DL assignments) or downlink allocations (DL allocations).

[0095] Multiple DCI formats are used. For example, one DCI format is used for scheduling PUSCHs placed in a particular cell. For example, another DCI format is used for scheduling PDSCHs placed in a particular cell.

[0096] The DCI format may include a field indicating whether it is an uplink DCI format or a downlink DCI format. The DCI format may include a field indicating the frequency domain resource allocation. The DCI format may include a field indicating the time domain resource allocation. The DCI format may include a field indicating whether frequency hopping is applied. The DCI format may include a field indicating either or both of the channel modulation scheme and target coding rate. The DCI format may include a field indicating instructions for CSI reporting. Note that various DCI formats may include additional fields other than those described above.

[0097] A downlink grant may be used for scheduling at least one PDSCH within a serving cell. A downlink grant may be used for scheduling at least one PDSCH in the same slot from which the downlink grant was transmitted. A downlink grant may be used for scheduling a PDSCH in a different slot from the one from which the downlink grant was transmitted. An uplink grant may be used for scheduling at least one PUSCH within a serving cell.

[0098] A PDSCH may be transmitted to transmit a transport block. A PDSCH may be used to transmit a transport block. A transport block may be placed on a PDSCH. Base station device 3 may transmit a PDSCH on which a transport block is placed. Terminal device 1 may receive a PDSCH on which a transport block is placed.

[0099] Downlink physical signals may correspond to a set of resource elements. Downlink physical signals do not necessarily have to be used to transmit information generated in the upper layers. However, downlink physical signals may be used to transmit information generated in the physical layer. Downlink physical signals may also be physical signals used in the downlink component carrier. Wireless transceiver 10 may receive downlink physical signals. Wireless transceiver 30 may transmit downlink physical signals. In the downlink of a wireless communication system according to one aspect of this embodiment, at least some or all of the following downlink physical signals may be used: Synchronization signal (SS) Downlink demodulation reference signal (DMRS) Channel state information-reference signal (CSI-RS) Downlink phase tracking reference signal (PTRS)

[0100] The synchronization signal is used by terminal device 1 to synchronize the downlink in the frequency domain and / or time domain. The synchronization signal is a general term for PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal).

[0101] An SS block (SS / PBCH block) may be configured that includes at least some or all of the PSS, SSS, and PBCH.

[0102] The antenna ports for PSS, SSS, PBCH, and DMRS for PBCH may be the same.

[0103] The PBCH whose symbol is transmitted at a given antenna port may be estimated by a DMRS for the PBCH located in the slot to which the PBCH is mapped, and which is included in the SS / PBCH block containing the PBCH.

[0104] DL DMRS is a general term for DMRS for PBCH, DMRS for PDSCH, and DMRS for PDCCH.

[0105] The set of antenna ports for a DMRS for a PDSCH (DMRS associated with a PDSCH, DMRS included in a PDSCH, and DMRS corresponding to a PDSCH) may be given based on the set of antenna ports for the PDSCH. For example, the set of antenna ports for a DMRS for a PDSCH may be the same as the set of antenna ports for the PDSCH.

[0106] The propagation path of a PDSCH may be estimated from the DMRS for that PDSCH. If the set of resource elements on which a PDSCH symbol is transmitted and the set of resource elements on which the DMRS symbol for that PDSCH is transmitted belong to the same Precoding Resource Group (PRG), then the PDSCH on which the PDSCH symbol is transmitted at a given antenna port may be estimated from the DMRS for that PDSCH.

[0107] The antenna port for the DMRS for PDCCH (DMRS associated with PDCCH, DMRS included in PDCCH, DMRS corresponding to PDCCH) may be the same as the antenna port for PDCCH.

[0108] The propagation path of a PDCCH may be inferred from the DMRS for that PDCCH. If the same precoder is applied (or assumed to be applied) to the set of resource elements on which the symbol of a PDCCH is transmitted and to the set of resource elements on which the symbol of the DMRS for that PDCCH is transmitted, then the PDCCH on which the symbol of that PDCCH is transmitted at a given antenna port may be inferred from the DMRS for that PDCCH.

[0109] BCH (Broadcast Channel), UL-SCH (Uplink-Shared Channel), and DL-SCH (Downlink-Shared Channel) are transport channels.

[0110] The BCH in the transport layer may be mapped to the PBCH in the physical layer. That is, transport blocks delivered from higher layers on the BCH in the transport layer may be placed on the PBCH in the physical layer. Also, the UL-SCH in the transport layer may be mapped to the PUSCH in the physical layer.

[0111] The transport layer may apply HARQ (Hybrid Automatic Repeat reQuest) to the transport block.

[0112] BCCH (Broadcast Control Channel), CCCH (Common Control Channel), and DCCH (Dedicated Control Channel) are logical channels. For example, BCCH may be used to deliver RRC messages containing MIBs or RRC messages containing system information. CCCH may be used to transmit RRC messages containing common RRC parameters to multiple terminal devices 1. Here, CCCH may be used, for example, for terminal devices 1 that are not RRC connected. DCCH may be used to transmit RRC messages dedicated to a particular terminal device 1. Here, DCCH may be used, for example, for terminal devices 1 that are RRC connected.

[0113] BCCH may be mapped to BCH or DL-SCH. That is, RRC messages containing MIB information may be delivered to BCH. Also, RRC messages containing system information other than MIB may be delivered to DL-SCH. CCCH is mapped to DL-SCH or UL-SCH. That is, RRC messages mapped to CCCH may be delivered to DL-SCH or UL-SCH. Also, DCCH may be mapped to DL-SCH or UL-SCH. That is, RRC messages mapped to DCCH may be delivered to DL-SCH or UL-SCH.

[0114] UL-SCH may be mapped to PUSCH. DL-SCH may be mapped to PDSCH. BCH may be mapped to PBCH.

[0115] For example, downlink control information, including downlink grants or uplink grants, is transmitted and received via the PDCCH, including the C-RNTI (Cell-Radio Network Temporary Identifier).

[0116] A single physical channel may be mapped to a single serving cell. A single physical channel may be mapped to a single BWP configured on a single carrier contained within a single serving cell.

[0117] Terminal device 1 may be configured with one or more control resource sets (CORESET). A control resource set is the frequency domain in which PDCCH monitoring takes place. Terminal device 1 monitors PDCCH in one or more control resource sets. Here, monitoring PDCCH in one or more control resource sets may include monitoring one or more PDCCHs corresponding to each of the one or more control resource sets. Note that a PDCCH may include one or more PDCCH candidates and / or a set of PDCCH candidates. A PDCCH candidate is a logical resource unit in which blind decoding of a PDCCH is performed. Furthermore, monitoring PDCCH may include monitoring and detecting the PDCCH and / or the DCI format transmitted through the PDCCH.

[0118] Multiple control resource sets may be configured in terminal device 1, and each control resource set may be assigned an index (control resource set index). One or more control channel elements (CCEs) may be configured within a control resource set, and each CCE may be assigned an index (CCE index). A control channel element is a logical resource unit that constitutes a PDCCH.

[0119] The set of PDCCH candidates monitored by terminal device 1 is defined in terms of the search space. In other words, the set of PDCCH candidates monitored by terminal device 1 is given by the search space.

[0120] The search region may consist of one or more PDCCH candidates at one or more aggregation levels. The aggregation level of a PDCCH candidate may indicate the number of CCEs that constitute the PDCCH. A PDDCH candidate may be mapped to one or more CCEs.

[0121] A set of search regions may consist of at least one or more search regions. Each search region may be assigned an index (search region index).

[0122] Each of the search area sets may be associated with at least one control resource set. Each of the search area sets may be contained within one control resource set. Each of the search area sets may be given an index of the control resource set associated with that search area set.

[0123] The terminal device 1 can detect the PDCCH and / or DCI for itself by blindly detecting PDCCH candidates included in the search area within the control resource set.

[0124] In various embodiments of this embodiment, unless otherwise specified, the number of resource blocks indicates the number of resource blocks in the frequency domain.

[0125] Terminal device 1 transmits uplink control information (UCI) to base station device 3. Terminal device 1 transmits the UCI by multiplexing it with PUSCH. Terminal device 1 transmits the UCI as MAC data. Terminal device 1 may also transmit the UCI as MAC CE. The UCI may include at least one of the following: downlink channel state information (CSI), or HARQ-ACK (Hybrid Automatic Repeat request ACKnowledgement) information for downlink data (Transport block, Medium Access Control Protocol Data Unit: MAC PDU, Downlink-Shared Channel: DL-SCH, Physical Downlink Shared Channel: PDSCH).

[0126] HARQ-ACK may also be referred to as ACK / NACK, HARQ feedback, HARQ-ACK feedback, HARQ response, HARQ-ACK response, HARQ information, HARQ-ACK information, HARQ control information, and HARQ-ACK control information.

[0127] If the data is successfully decoded, an ACK is generated for the data. If the data is not successfully decoded, a NACK is generated for the data. A HARQ-ACK may include at least HARQ-ACK bits corresponding to at least one transport block. HARQ-ACK bits may indicate an ACK (ACKnowledgement) or a NACK (Negative-ACKnowledgement) corresponding to one or more transport blocks. A HARQ-ACK may include at least a HARQ-ACK codebook containing one or more HARQ-ACK bits. The correspondence of one or more transport blocks by HARQ-ACK bits may correspond to a PDSCH containing the one or more transport blocks.

[0128] HARQ control over a single transport block may be called a HARQ process. Each HARQ process may be assigned a unique HARQ process identifier. The DCI format includes a field indicating the HARQ process identifier (HARQ process number).

[0129] A New Data Indicator (NDI) is represented in DCI format for each HARQ process. For example, the DCI format (DL assignment) containing the scheduling information of a PDSCH includes an NDI field. The NDI field is 1 bit. Terminal device 1 stores (remembers) the NDI value for each HARQ process. Base station device 3 stores (remembers) the NDI value for each HARQ process for each terminal device 1. Terminal device 1 updates the stored NDI value using the detected NDI field in DCI format. Base station device 3 sets the updated NDI value, or the NDI value that has not been updated, in the NDI field in DCI format and transmits it to terminal device 1. Terminal device 1 updates the stored NDI value using the detected NDI field in DCI format for the HARQ process corresponding to the value of the detected HARQ process identifier field in DCI format.

[0130] Terminal device 1 determines whether a received transport block is a new transmission or a retransmission based on the value of the NDI field in the DCI format (DL assignment). Terminal device 1 compares the value of the NDI field in the DCI format that was previously received for a transport block of a certain HARQ process, and if the detected value of the NDI field in the DCI format has been toggled, it determines that the received transport block is a new transmission. When base station device 3 transmits a transport block for a new transmission in a certain HARQ process, it toggles the value of the NDI stored for that HARQ process and sends the toggled NDI to terminal device 1. When base station device 3 transmits a transport block for a retransmission in a certain HARQ process, it does not toggle the value of the NDI stored for that HARQ process and sends the untoggled NDI to terminal device 1. When terminal device 1 compares the value of the NDI field in the DCI format that was previously received for a transport block of a certain HARQ process, it determines that the received transport block is a retransmission if the detected value of the NDI field in the DCI format has not been toggled (if they are the same). Note that "toggle" here means switching to a different value.

[0131] Terminal device 1 may report HARQ-ACK information for PDSCH reception of slot n using PUSCH transmissions from slot n+k onwards. Here, k may be a predefined value. Alternatively, k may be given by a higher-layer parameter.

[0132] Upper-layer parameters are parameters included in the upper-layer signal. The upper-layer signal may be RRC (Radio Resource Control) signaling or MAC CE (Medium Access Control Control Element). Here, the upper-layer signal may be the signal of the RRC layer or the signal of the MAC layer.

[0133] Information related to the reception of a PDCCH may include information related to an ID indicating the destination of the PDCCH. The ID indicating the destination of the PDCCH may be an ID used for scrambling the CRC bits attached to the PDCCH. The ID indicating the destination of the PDCCH is also called an RNTI (Radio Network Temporary Identifier). Information related to the reception of a PDCCH may include information related to an ID used for scrambling the CRC bits attached to the PDCCH. Terminal device 1 can attempt to receive the PDCCH based at least on the information related to the ID contained in the PBCH.

[0134] A MAC CE containing HARQ-ACK information includes HARQ-ACK information for one or more transport blocks. A MAC CE containing HARQ-ACK information indicates the HARQ-ACK status (ACK or NACK) for each of one or more transport blocks. A MAC CE containing a buffer status report includes information indicating the total amount of data available. A MAC CE containing a buffer status report includes information indicating the logical channel showing the total amount of data available. A MAC CE containing a buffer status report may also include information indicating the total amount of data available for each of multiple logical channels. A MAC CE containing a buffer status report may be organized by logical channel group rather than by logical channel. A MAC CE containing a power headroom report includes information indicating the power headroom level. A MAC CE containing C-RNTI includes information indicating C-RNTI. A MAC CE containing CSI includes information indicating CQI (Channel Quality Indicator). A MAC CE containing CSI may also include information indicating RI (Rank Indicator). MAC CEs, including CSIs, may also include information indicating the PMI (Precoding Matrix Indicator).

[0135] The media access control layer processing unit 15 of terminal device 1 collects data from different logical channels into the MAC PDU. The media access control layer processing unit 15 of terminal device 1 collects MAC CEs into the MAC PDU. When terminal device 1 receives an uplink grant, it generates a MAC PDU according to the size of the resources allocated in the uplink grant.

[0136] The logical channel prioritization procedure is applied in terminal device 1. The logical channel prioritization procedure is executed at the MAC layer. The media access control layer processing unit (MAC layer processing unit) 15 executes the logical channel prioritization procedure. The logical channel prioritization procedure is applied when a new transmission is performed. The media access control layer processing unit 15 allocates resources to the logical channels according to their priority. The media access control layer processing unit 15 allocates resources to the MAC CE according to its priority. The media access control layer processing unit 15 multiplexes the data from the logical channels and the MAC CE into the MAC PDU according to their priority.

[0137] MAC CEs containing data from logical channels and C-RNTI information are given higher priority than MAC CEs containing HARQ-ACK information. MAC CEs containing HARQ-ACK information are given higher priority than MAC CEs containing buffer status report information. MAC CEs containing HARQ-ACK information are given higher priority than MAC CEs containing power headroom report information. MAC CEs containing HARQ-ACK information are given higher priority than MAC CEs containing CSI. Logical channel data whose type is a common control channel is given higher priority than MAC CEs containing HARQ-ACK information. MAC CEs containing HARQ-ACK information are given higher priority than logical channel data whose type is not a common control channel (dedicated control channels, dedicated traffic channels).

[0138] The common control channel is a logical channel used to transfer control information between terminal device 1 and the network when there is no RRC connection. The dedicated control channel is a logical channel used to transfer control information between terminal device 1 and the network when there is an RRC connection. The dedicated traffic channel is a logical channel used to transfer user information.

[0139] Figure 5 is a diagram illustrating an example of the processing related to the multiplexing of MAC CEs containing HARQ-ACK information according to one aspect of this embodiment. Here, we will describe the case where terminal device 1 is in a state where it is transmitting MAC CEs containing at least HARQ-ACK information. Terminal device 1 receives an uplink grant from base station device 3 (step S201). Terminal device 1 determines whether there is a MAC CE or data with a higher priority than the MAC CE containing HARQ-ACK information (step S202). If terminal device 1 determines that there is a MAC CE or data with a higher priority than the MAC CE containing HARQ-ACK information (step S202: YES), it multiplexes the MAC CE or data with a higher priority than the MAC CE containing HARQ-ACK information to the MAC PDU (step S203). Next, terminal device determines whether there are resources remaining to multiplex the MAC CE or data (step S204). If terminal device 1 determines that there are resources remaining to multiplex MAC CEs or data (step S204: YES), it returns to step S202 and determines if there are MAC CEs or data with a higher priority than the MAC CE containing HARQ-ACK information. If terminal device 1 determines that there are no resources remaining to multiplex MAC CEs or data (step S204: NO), it terminates the process related to multiplexing MAC CEs containing HARQ-ACK information. If terminal device 1 determines that there are no MAC CEs or data with a higher priority than the MAC CE containing HARQ-ACK information (step S202: NO), it multiplexes the MAC CE containing HARQ-ACK information onto the MAC PDU (step S205). Then, terminal device 1 terminates the process related to multiplexing MAC CEs containing HARQ-ACK information.

[0140] As described above, embodiments of the present invention can set priorities for MAC CEs containing HARQ-ACK information so that resources are allocated to MAC CEs containing HARQ-ACK information in a preferred priority order.

[0141] The programs that run on the base station device 3 and terminal device 1 in this embodiment may be programs that control the CPU (Central Processing Unit) and the like (programs that make the computer function) in order to realize the functions of the above embodiment in this embodiment. The information handled by these devices is temporarily stored in RAM (Random Access Memory) during processing, and then stored in various ROMs such as Flash ROM (Read Only Memory) or HDD (Hard Disk Drive), and read, modified, and written by the CPU as needed.

[0142] Furthermore, the terminal device 1 and a part of the base station device 3 in the above-described embodiment may be implemented using a computer. In that case, the program for implementing this control function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read by a computer system and executed.

[0143] Furthermore, the term "computer system" as used herein refers to a computer system built into terminal device 1 or base station device 3, and includes hardware such as the OS and peripheral devices. In addition, "computer-readable recording medium" refers to portable media such as flexible disks, magneto-optical disks, ROMs, CD-ROMs, and storage devices such as hard disks built into computer systems.

[0144] Furthermore, "computer-readable recording media" may include those that dynamically hold programs for a short period of time, such as communication lines used when transmitting programs via networks such as the Internet or communication lines such as telephone lines, as well as those that hold programs for a certain period of time, such as volatile memory within a computer system that acts as a server or client in such cases. In addition, the above-mentioned program may be for the purpose of realizing some of the functions described above, and may also be a program that can realize the above-mentioned functions in combination with a program already recorded in the computer system.

[0145] Terminal device 1 may consist of at least one processor and at least one memory containing computer program instructions (computer program). The memory and computer program instructions (computer program) may be configured to cause terminal device 1 to perform the operations and processing described in the above embodiment using the processor. Base station device 3 may consist of at least one processor and at least one memory containing computer program instructions (computer program). The memory and computer program instructions (computer program) may be configured to cause base station device 3 to perform the operations and processing described in the above embodiment using the processor.

[0146] Furthermore, the base station device 3 in the above-described embodiment can also be realized as an assembly (device group) composed of multiple devices. Each device constituting the device group may have some or all of the functions or functional blocks of the base station device 3 related to the above-described embodiment. The device group only needs to have a complete set of the functions or functional blocks of the base station device 3. In addition, the terminal device 1 related to the above-described embodiment can also communicate with the base station device as an assembly.

[0147] Furthermore, the base station device 3 in the above-described embodiment may be EUTRAN (Evolved Universal Terrestrial Radio Access Network) and / or NG-RAN (NextGen RAN, NR RAN). Also, the base station device 3 in the above-described embodiment may have some or all of the functions of a higher-level node for eNodeB and / or gNB.

[0148] Furthermore, some or all of the terminal device 1 and base station device 3 in the above-described embodiment may be implemented as LSIs, which are typically integrated circuits, or as chipsets. Each functional block of the terminal device 1 and base station device 3 may be individually chipped, or some or all of them may be integrated into a single chip. In addition, the method of implementing the integrated circuit is not limited to LSIs; it may also be implemented using dedicated circuits or general-purpose processors. Moreover, if advances in semiconductor technology lead to the emergence of integrated circuit technologies that can replace LSIs, it is also possible to use integrated circuits based on those technologies.

[0149] Furthermore, although the above-described embodiment mentions a terminal device as an example of a communication device, the present invention is not limited to this and can also be applied to stationary or non-movable electronic devices installed indoors or outdoors, such as AV equipment, kitchen equipment, cleaning and washing machines, air conditioning equipment, office equipment, vending machines, and other household appliances, as well as terminal devices or communication devices.

[0150] While embodiments of this invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and design modifications and the like that do not depart from the gist of this invention are also included. Furthermore, the present invention can be modified in various ways within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of this invention. In addition, configurations in which elements described in each of the above embodiments that produce similar effects are substituted for each other are also included.

[0151] The present invention can be used, for example, in communication systems, communication equipment (e.g., mobile phone devices, base station devices, wireless LAN devices, or sensor devices), integrated circuits (e.g., communication chips), or programs.

[0152] 1 (1A, 1B, 1C) Terminal device 3 Base station device 10, 30 Wireless transceiver unit 11, 31 Antenna unit 12, 32 RF unit 13, 33 Baseband unit 14, 34 Upper layer processing unit 15, 35 Media access control layer processing unit 16, 36 Wireless resource control layer processing unit

Claims

1. A terminal device comprising a processor and memory for storing computer program code, wherein the terminal device receives uplink grants, multiplexes data from one or more MAC CEs and logical channels to a MAC PDU according to their respective priorities, and the MAC CE carrying information about HARQ-ACKs has a higher priority than data from logical channels other than the common control channel.

2. The terminal device according to claim 1, wherein the MAC CE carrying information about HARQ-ACK has a higher priority than the MAC CE carrying information about the buffer status report.

3. The terminal device according to claim 1, wherein the MAC CE carrying information about HARQ-ACK has a higher priority than the MAC CE carrying information about power headroom reports.

4. The terminal device according to claim 1, wherein the MAC CE carrying information about HARQ-ACK has a higher priority than the MAC CE carrying information about CSI.

5. The terminal device according to claim 1, wherein the MAC CE carrying information related to HARQ-ACK has a lower priority than data from the common control channel.

6. A communication method used in a terminal device, comprising the steps of receiving an uplink grant and multiplexing data from one or more MAC CEs and logical channels into a MAC PDU according to their respective priorities, wherein a MAC CE carrying information about HARQ-ACK has a higher priority than data from logical channels other than the common control channel.

Images