Base station and first terminal device

Abstract

To send a physical uplink control channel to a base station without causing retuning of a first terminal device regardless of a partial band used by the first terminal device.SOLUTION: A base station 100 of the present invention has a communication processing unit 141 for communicating with a first terminal device (terminal device 200A) in a partial band used by the first terminal device (terminal device 200A) of an uplink system band, and the partial band includes a physical uplink control channel region used by the first terminal device (terminal device 200A).SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The disclosure of this specification relates to a base station, a terminal device, a first terminal device, a method, a program, a recording medium, and a system. [Background technology]

[0002] The 3GPP (3rd Generation Partnership Project) is currently formulating specifications for NR (New Radio), a fifth-generation mobile communication system. NR differs significantly from the current mobile communication system, LTE (Long Term Evolution), in that the transmission and reception bandwidths of each terminal device may differ (see, for example, Non-Patent Documents 1, 2, and 3).

[0003] In a typical mobile communication system, a terminal device transmits, on the uplink, Hybrid Automatic Repeat Request Acknowledgement (HARQ-ACK) information indicating whether data received on the downlink has been correctly decoded. In NR, a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH) is used as a physical channel for transmitting Uplink Control Information (UCI) including this HARQ-ACK information.

[0004] For example, Patent Document 1 discloses that a base station dynamically determines a PUCCH resource from candidates notified to a terminal device in advance, and notifies the terminal device of the PUCCH resource.

[0005] The PUCCH used in NR is expected to have a structure similar to that of PUCCH format 1 / 1a / 1b used in LTE. One specific commonality is that frequency hopping within a slot is supported. When frequency hopping is performed in transmitting such a PUCCH, as described in Non-Patent Document 1, for example, the maximum transmission bandwidth of each terminal device in NR may differ, so it may be necessary to change (retune) the transmission bandwidth within the uplink system band. Specifically, a terminal device whose maximum transmission bandwidth is smaller than the uplink system bandwidth may need to perform frequency hopping using both ends of the uplink system band by performing the above-mentioned retuning.

[0006] Here, as described in Non-Patent Document 4, for example, retuning accompanied by a change in the center frequency requires a time period of 50 to 200 microseconds. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Special Publication No. 2014-504061 [Non-patent literature]

[0008] [Non-Patent Document 1] RAN WG1 “LS on UE RF Bandwidth Adaptation in NR”, 3GPP TSG RAN WG1 Meeting #87. Reno, USA, 14-18 November 2016. R1-1613663 [Non-patent document 2] RAN WG1 NR Ad-Hoc#2 “Bandwidth part configuration and frequency resource allocation”, 3GPP TSG RAN WG1 NR Ad-Hoc#2. Qingdao, PR China 27th - 30th June 2017. R1-1710164 [Non-patent document 3] RAN WG1 “Further views on wider bandwidth operations for NR”, 3GPP TSG RAN WG1 Meeting #89. Hangzhou, PR China 15th - 19th May 2017. R1-1708494 [Non-patent document 4] RAN WG4 “Reply LS on UE RF Bandwidth Adaptation in NR”, 3GPP TSG RAN WG1 Meeting #88bis. Spokane, USA, 3-7 April 2017. R1-1704179 (R4-1702029) Summary of the Invention [Problem to be solved by the invention]

[0009] However, performing retuning requires, for example, inserting a guard interval, which reduces communication resources available for transmitting the PUCCH and may result in a reduction in coverage.

[0010] One of the objectives that the disclosure of this specification aims to achieve is to provide a base station, a terminal device, a first terminal device, a method, a program, a recording medium, and a system that enable the first terminal device to transmit a physical uplink control channel to the base station without retuning, regardless of the partial band used by the first terminal device. [Means for solving the problem]

[0011] According to one aspect of the present invention, a base station includes a communication processing unit that communicates with a first terminal device in an active uplink bandwidth part of an uplink system band used by the first terminal device, and transmits first control information to the first terminal device that identifies relative resources of the physical uplink control channel within the active uplink bandwidth part for the first terminal device to use for transmitting the physical uplink control channel.

[0012] According to one aspect of the present invention, a terminal device includes a communication processing unit that communicates with a base station in an active uplink bandwidth part of an uplink system band, and receives first control information from the base station that identifies relative resources of the physical uplink control channel within the active uplink bandwidth part to be used for transmitting the physical uplink control channel.

[0013] According to one aspect of the present invention, a base station includes a communication processing unit that communicates with a first terminal device within a partial band of an uplink system band used by the first terminal device, the partial band including a physical uplink control channel area used by the first terminal device.

[0014] According to one aspect of the present invention, a first terminal device includes a communication processing unit that communicates with a base station within a partial band of an uplink system band used by the first terminal device, the partial band including a physical uplink control channel region used by the first terminal device.

[0015] According to one aspect of the present invention, a first method includes communicating with a first terminal device within a partial band of an uplink system band used by the first terminal device, the partial band including a physical uplink control channel region used by the first terminal device.

[0016] According to one aspect of the present invention, a second method includes communicating with a base station within a partial band of an uplink system band used by a first terminal device, the partial band including a physical uplink control channel region used by the first terminal device.

[0017] According to one aspect of the present invention, the first program is a program that causes a processor to execute the following: communicating with a first terminal device within a partial band of an uplink system band used by the first terminal device, the partial band including a physical uplink control channel area used by the first terminal device.

[0018] According to one aspect of the present invention, the second program is a program that causes a processor to communicate with a base station within a partial band of an uplink system band used by a first terminal device, the partial band including a physical uplink control channel area used by the first terminal device.

[0019] According to one aspect of the present invention, the first recording medium is a computer-readable non-transitory recording medium having recorded thereon a program that causes a processor to execute the following: communicate with a first terminal device within a partial band of an uplink system band used by the first terminal device, the partial band including a physical uplink control channel area used by the first terminal device.

[0020] According to one aspect of the present invention, the second recording medium is a computer-readable non-transitory recording medium having recorded thereon a program that causes a processor to execute the following: communicate with a base station within a partial band of an uplink system band used by a first terminal device, the partial band including a physical uplink control channel area used by the first terminal device.

[0021] According to one aspect of the present invention, a system includes a base station having a communication processing unit that communicates with a first terminal device within a partial band of an uplink system band used by the first terminal device, and a first terminal device having a communication processing unit that communicates with the base station within the partial band, the partial band including a physical uplink control channel area used by the first terminal device. [Effects of the Invention]

[0022] According to the present invention, it is possible for the first terminal device to transmit a physical uplink control channel to the base station without retuning, regardless of the partial band used by the first terminal device. Note that the present invention may achieve other effects instead of or in addition to the effect described above. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a diagram showing an example of the configuration of a Long PUCCH when one slot is made up of 14 OFDM symbols. [Figure 2] FIG. 2 is a diagram showing an example of the configuration of a Long PUCCH when one slot is made up of seven OFDM symbols. [Figure 3] FIG. 3 is a diagram showing examples of combinations of Δshift, cyclic shift number u, and orthogonal cover code number c. [Figure 4] FIG. 4 is a schematic diagram of a case where one terminal device transmits HARQ-ACK information on a Long PUCCH. [Figure 5] FIG. 5 is a diagram showing a specific example of resource positions where each of terminal devices A to D, whose maximum transmission bandwidth is smaller than the uplink system bandwidth, performs frequency hopping. [Figure 6] FIG. 6 is an explanatory diagram showing an example of a schematic configuration of a system 1 according to an embodiment of the present invention. [Figure 7] FIG. 7 is a block diagram showing an example of a schematic configuration of the base station 100 according to the first embodiment. [Figure 8]FIG. 8 is a block diagram showing an example of a schematic configuration of the terminal device 200 according to the first embodiment. [Figure 9] FIG. 9 is a diagram showing sub-bands according to the first specific example. [Figure 10] FIG. 10 is a diagram showing sub-bands according to the second specific example. [Figure 11] FIG. 11 is a diagram showing a specific example of two or more candidate bands set for terminal group A. In FIG. [Figure 12] FIG. 12 is a diagram showing a specific example of two or more candidate bands set for terminal group B. In FIG. [Figure 13] FIG. 13 is a diagram showing the positions of Long PUCCHs used by terminal group A and terminal group B, respectively. [Figure 14] FIG. 14 is a diagram illustrating a specific example of relative resource numbers for Long PUCCH resources within a subband or a candidate band. [Figure 15] FIG. 15 is a block diagram showing an example of a schematic configuration of a base station 100 according to the second embodiment. [Figure 16] FIG. 16 is a block diagram showing an example of a schematic configuration of a terminal device 200 according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and drawings, elements that can be similarly described will be designated by the same reference numerals, and redundant description will be omitted.

[0025] The explanation will be given in the following order: 1. Related technologies 2. Overview of the Embodiments of the Present Invention 3. System Configuration 4. First Embodiment 4.1. Base Station Configuration 4.2. Terminal Device Configuration 4.3. Technical Features 4.4.Example 5. Second embodiment 5.1. Base Station Configuration 5.2. Terminal Device Configuration 5.3. Technical Features 6. Other forms

[0026] <<1. Related Technology>> As a technique related to the embodiment of the present invention, a PUCCH (Physical Uplink Control Channel) used in NR will be mainly described.

[0027] In NR, there are two types of PUCCHs with different time lengths: a PUCCH with a short time length (hereinafter referred to as a "Short PUCCH") and a PUCCH with a long time length (hereinafter referred to as a "Long PUCCH").

[0028] Among these, the Long PUCCH is composed of 4 to 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols, and is expected to be used mainly to improve coverage.

[0029] Furthermore, if the number of UCI bits transmitted on Long PUCCH is 2 or less, based on the agreements reached so far, it is expected that the structure will be similar to LTE PUCCH format 1 / 1a / 1b.

[0030] Specific commonalities include support for frequency hopping within a slot, the use of BPSK (Binary Phase Shift Keying) or QPSK (Quadrature Phase Shift Keying) for modulation of HARQ-ACK information, multiplication of a sequence by repeated modulation symbols in the time domain, and the applicability of orthogonal cover codes in the time domain to UCI and RS (Reference Signal).

[0031] In NR, a slot is one of the scheduling units. In the case of Normal Cyclic Prefix (CP), one slot consists of 7 or 14 OFDM symbols.

[0032] One RB (Resource Block) is composed of 12 consecutive subcarriers in the frequency domain. Since the time length of an RB in NR is undefined, in this embodiment, an "RB" is used as the "smallest unit of resource allocation in the frequency domain." Furthermore, what is referred to as an "RB" in this specification may also be referred to as a "PRB (Physical Resource Block)."

[0033] Figure 1 shows an example of the configuration of a Long PUCCH when one slot is composed of 14 OFDM symbols. Specifically, in the example configuration shown in Figure 1(A), 14 OFDM symbols are used to transmit the Long PUCCH. A Long PUCCH with such a configuration is realized when all OFDM symbols in one slot are usable for uplink transmission.

[0034] On the other hand, in the configuration example shown in Fig. 1(B), 10 OFDM symbols are used to transmit the Long PUCCH. This is an example using a slot configuration in TDD (Time Division Duplex). Specifically, after a PDCCH (Physical Downlink Control Channel) is transmitted at the beginning of the slot, a guard interval required when switching from downlink to uplink is inserted. Subsequently, a Short PUCCH and / or an SRS (Sounding Reference Signal) are transmitted after the slot. A total of 4 OFDM symbols are used for these transmissions, and the remaining 10 OFDM symbols are used to transmit the Long PUCCH.

[0035] Figure 2 shows an example of a Long PUCCH configuration where one slot is made up of seven OFDM symbols. In the example configuration shown in Figure 2(A), seven OFDM symbols are used to transmit the Long PUCCH. In the example configuration shown in Figure 2(B), four OFDM symbols are used to transmit the Long PUCCH.

[0036] It is possible to multiplex UCIs for multiple terminal devices into one RB included in the Long PUCCH. This multiplexing is achieved by each terminal device using a combination of a different cyclic shift and an orthogonal cover code. In this embodiment, a multiplexing method in LTE PUCCH format 1 / 1a / 1b is assumed.

[0037] First, multiplexing by cyclic shift is realized by using a CAZAC (Constant Amplitude Zero Auto-Correlation) sequence for transmitting UCI and RS. A CAZAC sequence has a property that the autocorrelation value is 0 when the cyclic shift amount is other than 0. A cyclic shift refers to a shift process that sequentially moves the last element of a sequence to the beginning. An example of a CAZAC sequence is a Zadoff-Chu sequence. In LTE, CGS (Computer Generated Sequences) are used as CAZAC sequences when the sequence length is 12 or 24.

[0038] If the time length of one OFDM symbol excluding the CP portion is divided into 12 equal parts and the time length is ΔT, then by performing a cyclic shift of u × ΔT (u is an integer between 0 and 11), it becomes possible to multiplex up to 12 UCIs and RSs. Here, in order to maintain orthogonality between terminals, the minimum interval of the cyclic shift must be greater than the maximum delay path of the propagation path. In LTE, the parameter Δ shift (Δ shift =1,2,3), the minimum interval of cyclic shift Δ shift×ΔT is adjusted. Therefore, the maximum number of multiplexed signals by cyclic shift is 12 / Δ shift This becomes:

[0039] Multiplexing using an orthogonal cover code is achieved by block spreading the UCI and RS over multiple OFDM symbols. By using an orthogonal cover code, it is possible to block spread and multiplex the same number of complex symbols as the sequence length of the orthogonal cover code. Here, the orthogonal cover code is applied independently to the UCI and RS before and after frequency hopping, and the sequence length is equal to the number of OFDM symbols assigned to each. As a result, the maximum number of multiplexed symbols is the minimum value of the number of OFDM symbols assigned to the UCI and RS before and after frequency hopping.

[0040] The maximum number of multiplexed signals using orthogonal cover codes is 3 in the configuration example shown in Fig. 1(A), and 2 in the configuration example shown in Fig. 1(B). On the other hand, in the configuration examples shown in Fig. 2(A) and Fig. 2(B), the RS is composed of a single OFDM symbol after frequency hopping, so multiplexing using orthogonal cover codes is not performed.

[0041] The number of multiplexed UCIs per RB of the Long PUCCH, N, is expressed as the product of the maximum number of multiplexed UCIs by cyclic shift and the maximum number of multiplexed UCIs by orthogonal cover code. For example, when the maximum number of multiplexed UCIs by cyclic shift is 4 (i.e., Δ shift = 3) and the maximum number of multiplexing by orthogonal cover codes is 3, 4 × 3 = 12 UCIs can be multiplexed per RB.

[0042] Figure 3 shows the Δ shift 3 is a diagram showing an example of a combination of a cyclic shift number u and an orthogonal cover code number c. By referring to the combinations shown in FIG. 3, it is possible to number resources that can be multiplexed into one RB of Long PUCCH. Note that FIG. 3 is just an example, and different numbering may be used for each cell, for example.

[0043] 4 is a schematic diagram of a case where one terminal device transmits HARQ-ACK information on a Long PUCCH. A base station transmits data addressed to the terminal device on a PDSCH (Physical Downlink Shared Channel), and transmits DCI (Downlink Control Information) including allocation information for the data on a PDCCH (Physical Downlink Control Channel). Meanwhile, the terminal device receives DCI addressed to itself on the PDCCH, and then receives data on the PDSCH based on the DCI. Then, the terminal device transmits HARQ-ACK information indicating whether the data has been correctly decoded on a Long PUCCH in an uplink slot.

[0044] In NR, a partial band (Bandwidth part) consisting of consecutive RBs is set for a terminal device separately for the uplink and downlink. The number of RBs set for a partial band is equal to or less than the maximum bandwidth supported by each terminal device. One or more partial bands are set for each terminal device. The terminal device receives downlink signals using an active downlink partial band among the set partial bands, and transmits uplink signals using an active uplink partial band.

[0045] <<2. Overview of the Embodiments of the Present Invention>> First, an outline of the embodiment of the present invention will be described.

[0046] (1)Technical issues As described above, in NR, the maximum transmission bandwidth of each terminal device may be different, and therefore, when frequency hopping is performed in transmitting the Long PUCCH, the hopping interval in the frequency domain may also be different for each terminal device. For example, a terminal device whose maximum transmission bandwidth is smaller than the uplink system bandwidth may perform frequency hopping to a location other than the edge of the uplink system band for transmitting the Long PUCCH.

[0047] Fig. 5 is a diagram showing a specific example of resource positions where each of terminal devices A to D, whose maximum transmission bandwidth is smaller than the uplink system bandwidth, performs frequency hopping. As shown in Fig. 5, fragmented resources may occur. The existence of such fragmented resources reduces the degree of freedom in PUSCH resource allocation.

[0048] In addition, in NR, it has been agreed that both CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) and DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing) can be used as uplink transmission waveforms. Furthermore, when DFT-s-OFDM is used as the transmission waveform for PUSCH, it is assumed that only contiguous RB allocation is supported.

[0049] Here, considering the existence of fragmented RBs as shown in Fig. 5 above, in the case of DFT-s-OFDM, the number of consecutive RBs that can be allocated to one terminal device is limited. Also, in the case of CP-OFDM, although non-contiguous RBs can be allocated, considering the overhead of resource allocation information, it is difficult to allocate resources that utilize all of the fragmented RBs. Therefore, there is a possibility that unused RBs will increase and the utilization efficiency of radio resources will decrease.

[0050] As a method for preventing the occurrence of the aforementioned fragmented resources, it has been proposed to transmit PUCCH on resources located at the edges of the subbands by setting up multiple subbands within the uplink system band, as disclosed in the following reference document, for example. [Reference] CMCC “Discussion on subband-based PUCCH resource allocation and indication”, 3GPP TSG RAN WG1 Meeting NR Ad-Hoc#2. Qingdao, China, 27-30 June 2017. R1-1710782

[0051] However, the above reference does not disclose any restrictions on the number of RBs of a subband and its starting position in the frequency domain. Therefore, if it is possible to arrange subbands with any number of RBs at any position in the frequency domain, the overhead of notifying information about the subbands to a terminal device will be large.

[0052] Here, by performing retuning to change the transmission band within the uplink system band, a terminal device whose maximum transmission bandwidth is smaller than the uplink system bandwidth can perform frequency hopping using both ends of the uplink system band. However, retuning, which involves changing the center frequency, requires, for example, 50 to 200 microseconds. To perform such retuning, for example, it is necessary to insert a guard interval, which reduces the number of OFDM symbols available for transmitting Long PUCCH, and may result in a reduction in coverage.

[0053] (2) Technical Features In an embodiment of the present invention, for example, a base station includes a communication processing unit that communicates with a first terminal device within a partial band of an uplink system band used by the first terminal device, and the partial band includes a physical uplink control channel area used by the first terminal device.

[0054] Also, in an embodiment of the present invention, for example, a first terminal device includes a communication processing unit that communicates with a base station within a partial band of an uplink system band used by the first terminal device, and the partial band includes a physical uplink control channel area used by the first terminal device.

[0055] According to the above embodiment, for example, regardless of the partial band used by the first terminal device, the first terminal device can transmit the physical uplink control channel to the base station without retuning. More specifically, even if the partial band of the first terminal device is smaller than the uplink system band, the first terminal device can transmit the physical uplink control channel to the base station without retuning.

[0056] The above-described technical features are specific examples of embodiments of the present invention, and it goes without saying that the embodiments of the present invention are not limited to the above-described technical features.

[0057] <<3. System Configuration>> An example of the configuration of a system 1 according to an embodiment of the present invention will be described with reference to Fig. 6. Fig. 6 is an explanatory diagram showing an example of a schematic configuration of a system 1 according to an embodiment of the present invention. Referring to Fig. 6, the system 1 includes a base station 100, a terminal device 200A, and a terminal device 200B. Hereinafter, the terminal device 200A and the terminal device 200B will be collectively referred to as the terminal device 200.

[0058] For example, system 1 is a system that complies with the standards / specifications of 3GPP (Third Generation Partnership Project). More specifically, system 1 may be a system that complies with the standards / specifications of LTE / LTE-Advanced / LTE-Advanced Pro and / or SAE (System Architecture Evolution). Alternatively, system 1 may be a system that complies with the standards / specifications of 5th generation (5G) / NR (New Radio). Naturally, system 1 is not limited to these examples.

[0059] (1)Base station 100 The base station 100 is a node of a radio access network (RAN), and performs wireless communication with terminal devices (for example, terminal device 200A and terminal device 200B) located within its coverage area.

[0060] For example, the base station 100 may be an evolved Node B (eNB), a generation Node B (gNB) in 5G, or a Transmission Reception Point (TRP). The base station 100 may include a plurality of units (or a plurality of nodes). The plurality of units (or a plurality of nodes) may include a first unit (or a first node) that processes a higher protocol layer and a second unit (or a second node) that processes a lower protocol layer. As an example, the first unit may be called a center / central unit (CU), and the second unit may be called a distributed unit (DU) or an access unit (AU). As another example, the first unit may be called a digital unit (DU), and the second unit may be called a radio unit (RU) or a remote unit (RU). The DU (Digital Unit) may be a BBU (Base Band Unit), and the RU may be an RRH (Remote Radio Head) or an RRU (Remote Radio Unit). Naturally, the names of the first unit (or first node) and the second unit (or second node) are not limited to this example. Alternatively, the base station 100 may be a single unit (or a single node). In this case, the base station 100 may be one of the multiple units (e.g., one of the first unit and the second unit) or may be connected to another unit of the multiple units (e.g., the other of the first unit and the second unit).

[0061] (2) Terminal Device 200 The terminal device 200 performs wireless communication with a base station. For example, when the terminal device 200 is located within the coverage area of ​​the base station 100, the terminal device 200 performs wireless communication with the base station 100. For example, the terminal device 200 is User Equipment (UE). The terminal device 200 may be called a "wireless communication device," "wireless communication terminal," "user device," "user terminal," "mobile station," or the like, instead of a "terminal device."

[0062] In this embodiment, the terminal device 200A has, for example, a different maximum reception bandwidth and a different maximum transmission bandwidth from the terminal device 200B. More specifically, the terminal device 200A has a smaller maximum reception bandwidth and a smaller maximum transmission bandwidth than the terminal device 200B. In this way, the system 1 includes a mixture of terminal devices having different maximum reception bandwidths / maximum transmission bandwidths.

[0063] <<4. First Embodiment>> A first embodiment of the present invention will be described with reference to FIGS.

[0064] 4.1. Base station configuration An example of the configuration of the base station 100 according to the first embodiment will be described with reference to Fig. 7. Fig. 7 is a block diagram showing an example of a schematic configuration of the base station 100 according to the first embodiment. Referring to Fig. 7, the base station 100 includes a radio communication unit 110, a network communication unit 120, a storage unit 130, and a processing unit 140.

[0065] (1) Wireless Communication Unit 110 The wireless communication unit 110 transmits and receives signals wirelessly. For example, the wireless communication unit 110 receives signals from a terminal device and transmits signals to the terminal device.

[0066] (2) Network communication unit 120 The network communication unit 120 receives signals from the network and transmits signals to the network.

[0067] (3) Storage section 130 The storage unit 130 temporarily or permanently stores programs (instructions), parameters, and various data for the operation of the base station 100. The programs include one or more instructions for the operation of the base station 100.

[0068] (4) Processing unit 140 The processing unit 140 provides various functions of the base station 100. The processing unit 140 includes a communication processing unit 141 and an information acquisition unit 143. The processing unit 140 may further include other components in addition to these components. That is, the processing unit 140 may also perform operations other than those of these components. The specific operations of the communication processing unit 141 and the information acquisition unit 143 will be described in detail later.

[0069] For example, the processing unit 140 (communication processing unit 141) communicates with a terminal device (for example, the terminal device 200) via the wireless communication unit 110.

[0070] (5) Implementation example The wireless communication unit 110 may be implemented by an antenna and a radio frequency (RF) circuit, etc., and the antenna may be a directional antenna. The network communication unit 120 may be implemented by a network adapter and / or a network interface card, etc. The storage unit 130 may be implemented by a memory (e.g., non-volatile memory and / or volatile memory) and / or a hard disk, etc. The processing unit 140 may be implemented by one or more processors, such as a baseband (BB) processor and / or other types of processors. The communication processing unit 141 and the information acquisition unit 143 may be implemented by the same processor or may be implemented separately by different processors. The memory (storage unit 130) may be included in the one or more processors or may be external to the one or more processors.

[0071] Base station 100 may include a memory that stores a program (instructions) and one or more processors that can execute the program (instructions). The one or more processors may execute the program to perform the operation of processing unit 140 (the operation of communication processing unit 141 and / or information acquisition unit 143). The program may be a program that causes a processor to perform the operation of processing unit 140 (the operation of communication processing unit 141 and / or information acquisition unit 143).

[0072] The base station 100 may be virtualized. That is, the base station 100 may be implemented as a virtual machine. In this case, the base station 100 (virtual machine) may operate as a virtual machine on a physical machine (hardware) including a processor, a memory, etc., and a hypervisor.

[0073] <4.2. Terminal Device Configuration> An example of the configuration of the terminal device 200 according to the first embodiment will be described with reference to Fig. 8. Fig. 8 is a block diagram showing an example of a schematic configuration of the terminal device 200 according to the first embodiment. Referring to Fig. 8, the terminal device 200 includes a wireless communication unit 210, a storage unit 220, and a processing unit 230.

[0074] (1) Wireless Communication Unit 210 The wireless communication unit 210 transmits and receives signals wirelessly. For example, the wireless communication unit 210 receives signals from a base station and transmits signals to the base station.

[0075] (2) Storage section 220 The storage unit 220 temporarily or permanently stores programs (instructions), parameters, and various data for the operation of the terminal device 200. The programs include one or more instructions for the operation of the terminal device 200.

[0076] (3) Processing unit 230 The processing unit 230 provides various functions of the terminal device 200. The processing unit 230 includes a communication processing unit 231. The processing unit 230 may further include other components in addition to these components. That is, the processing unit 230 may also perform operations other than those of these components. The specific operation of the communication processing unit 231 will be described in detail later.

[0077] For example, the processing unit 230 (communication processing unit 231) communicates with a base station (for example, the base station 100) via the wireless communication unit 210.

[0078] (4) Implementation example The wireless communication unit 210 may be implemented by an antenna and a radio frequency (RF) circuit, etc. The storage unit 220 may be implemented by a memory (e.g., a non-volatile memory and / or a volatile memory) and / or a hard disk, etc. The processing unit 230 may be implemented by one or more processors, such as a baseband (BB) processor and / or other types of processors. The communication processing unit 231 may be implemented by the same processor, or may be implemented separately by a different processor. The memory (storage unit 220) may be included in the one or more processors, or may be located outside the one or more processors. As an example, the processing unit 230 may be implemented in an SoC (System on Chip).

[0079] The terminal device 200 may include a memory that stores a program (instructions) and one or more processors that can execute the program (instructions). The one or more processors may execute the program to perform the operation of the processing unit 230 (the operation of the communication processing unit 231). The program may be a program that causes the processor to perform the operation of the processing unit 230 (the operation of the communication processing unit 231).

[0080] 4.3. Technical Features Next, the technical features of the first embodiment will be described.

[0081] The base station 100 (communication processing unit 141) communicates with a first terminal device (terminal device 200A) within a partial band used by the first terminal device (terminal device 200A) of the uplink system band, and the first terminal device (communication processing unit 231 of the terminal device 200A) communicates with the base station 100 within the partial band. The partial band includes a physical uplink control channel region used by the first terminal device (terminal device 200A).

[0082] With this configuration, for example, regardless of the partial band used by the first terminal device (terminal device 200A), the first terminal device (terminal device 200A) can transmit the physical uplink control channel to the base station 100 without retuning. More specifically, even if the partial band of the first terminal device (terminal device 200A) is smaller than the uplink system band, the first terminal device (terminal device 200A) can transmit the physical uplink control channel to the base station 100 without retuning.

[0083] (1) Partial Band The partial band may include a plurality of physical uplink control channel regions used by the first terminal device (terminal device 200A), where the plurality of physical uplink control channel regions may be separated from each other in the frequency direction.

[0084] For example, when frequency hopping is performed for transmitting a physical uplink control channel, one of the plurality of physical uplink control channel regions may be a region for transmitting the physical uplink control channel before frequency hopping, and another one of the physical uplink control channel regions may be a region for transmitting the physical uplink control channel after frequency hopping.

[0085] Furthermore, the uplink system band includes a plurality of sub-bands, each of which includes a plurality of resource blocks that are contiguous in the frequency direction. In the uplink system band configured as above, the partial band includes one or more of the plurality of sub-bands.

[0086] Furthermore, the partial band may be one or more of the plurality of sub-bands, that is, the size and location of the partial band may be determined by one or more sub-bands.

[0087] Furthermore, the partial bands may be configured to correspond to a specific numerology. The specific numerology may be a parameter based on at least one of a subcarrier spacing, a TTI (Transmission Time Interval), and a CP (Cyclic Prefix) Type. Furthermore, one or more partial bands may be semi-statically configured for a terminal device for each CC (Component Carrier).

[0088] When multiple partial bands are set for one terminal device, different numerologies may be set for each of the multiple partial bands. For example, the different numerologies may be set such that the reference subcarrier spacing f0 is 15 kHz and the other subcarrier spacings are f sc =2 n × f0, or a scalable value. That is, the subcarrier spacing may be a scalable value that is a power of 2. Also, a different CP Type may be set for each of the plurality of partial bands. That is, either a normal CP or an extended CP may be set for each partial band.

[0089] Furthermore, the partial band used by the first terminal device (terminal device 200A) may include one or more of the sub-bands included in the partial band used by a second terminal device (terminal device 200B) different from the first terminal device (terminal device 200A).

[0090] A specific example of the sub-band configuration will be described later.

[0091] (2) Physical uplink control channel area The physical uplink control channel region is located within a sub-band included in the partial band.

[0092] For example, if the partial band includes two or more sub-bands, the physical uplink control channel region is located within one of the two or more sub-bands included in the partial band.

[0093] The physical uplink control channel region may be located in an edge sub-band of the two or more sub-bands, where the edge sub-band is the lowest sub-band in the frequency direction or the highest sub-band in the frequency direction of the two or more sub-bands.

[0094] Here, when the partial band includes a plurality of physical uplink control channel areas spaced apart from each other in the frequency direction as described above, the respective physical uplink control channel areas are, for example, first and second physical uplink control channel areas. In this case, the first and second physical uplink control channel areas are located in different sub-bands from each other, for example. That is, the first physical uplink control channel area is located in one of the two or more sub-bands included in the partial band, and the second physical uplink control channel area is located in a sub-band different from the sub-band in which the first physical uplink control channel area is located, among the two or more sub-bands included in the partial band. Note that the first and second physical uplink control channel areas are not limited to the above case, and may be included in positions spaced apart from each other in the frequency direction within the same sub-band.

[0095] Furthermore, the physical uplink control channel region is located at a predetermined location within the subband, where the predetermined location is at an edge of the subband or a predetermined distance from the edge of the subband. For example, the physical uplink control channel region may be located between the edge of the subband and a location that is 20%, 25%, or 50% of the width of the subband from the edge.

[0096] -Candidate bands The physical uplink control channel region may be located in one of two or more candidate bands within the partial band, where each of the two or more candidate bands is one sub-band within the partial band or two or more sub-bands that are consecutive in frequency direction within the partial band.

[0097] For example, specific locations of the first and second physical uplink control channel areas are as follows: For example, when the candidate band in which the physical uplink control channel area is located is composed of one subband, the first physical uplink control channel area is located at one end of the subband, and the second physical uplink control channel area is located at the other end of the subband; and when the candidate band in which the physical uplink control channel area is located is composed of two or more subbands consecutive in the frequency direction, the first physical uplink control channel area is located in the subband located at one end of the candidate band, and the second physical uplink control channel area is located in the subband located at the other end of the candidate band.

[0098] (3) Control information The base station 100 (information acquisition unit 143) acquires first control information for identifying the physical uplink control channel region, and the base station 100 (communication processing unit 141) transmits the first control information to the first terminal device (terminal device 200A).

[0099] As described above, when the physical uplink control channel area is located within a sub-band included in the partial band, the first control information is control information for identifying the sub-band in which the physical uplink control channel area is located.

[0100] Also, as described above, when the physical uplink control channel area is located in one of the two or more candidate bands in the partial band, the first control information is control information for identifying the candidate band in which the physical uplink control channel area is located.

[0101] Specifically, for example, the following two types of indexes are used as the first control information: One index is an index (hereinafter referred to as an absolute index) for identifying a candidate band in which the physical uplink control channel region is located from among a plurality of candidate bands in the uplink system band; and the other index is an index (hereinafter referred to as a relative index) for identifying a candidate band in which the physical uplink control channel region is located from among the two or more candidate bands in the partial band.

[0102] For example, if there is an agreement between a base station and a terminal device that the physical uplink control channel area is located in a sub-band located at the edge of a candidate band, the first terminal device (terminal device 200A) can identify the candidate band based on the index and thereby specify the sub-band in which the physical uplink control channel area is located.

[0103] Also, for example, the base station 100 (communication processing unit 141) may transmit DCI (Downlink Control Information) including the index to the first terminal device (terminal device 200A). Also, the base station 100 (communication processing unit 141) may transmit a MAC (Media Access Control) control element including the index to the first terminal device (terminal device 200A).

[0104] In this way, when the candidate band in which the physical uplink control channel region is located is identified by the first control information, the base station 100 (information acquisition unit 143) may acquire second control information for identifying the two or more candidate bands. Then, the base station 100 (communication processing unit 141) may transmit the second control information to the first terminal device (terminal device 200A).

[0105] Specifically, the base station 100 (communication processing unit 141) transmits a MAC control element including the second control information to the first terminal device (terminal device 200A). Note that the base station 100 (communication processing unit 141) may transmit an RRC (Radio Resource Control) message including the second control information to the first terminal device (terminal device 200A).

[0106] <4.4. Specific Examples> Next, a specific example of the processing performed by the system 1 will be described.

[0107] (1) Specific examples of sub-bands -First specific example 9 is a diagram illustrating subbands according to a first specific example. In the first specific example, as shown in FIG. 9, the uplink system band is divided into subbands N sb The sub-bands are set by dividing the uplink system band equally into the number of RBs N UL RB N sb If the difference in the number of RBs between subbands is not divisible by, for example, the following formula can be used to make the difference in the number of RBs between subbands equal to or less than 1.

number

[0108] As an example, the number of RBs in the uplink system band is N UL RBis 275 and the number of sub-bands is N sb If is 10, then P=5 according to the above formula. That is, the 0th to 4th subbands are made up of 28 RBs, and the 5th to 9th subbands are made up of 27 RBs.

[0109] Also, the number of RBs per subband, N RB Here, the number of RBs in the uplink system band N UL RB N RB When the number of RBs in the subbands located at either end of the uplink system band is not divisible by N, for example, UL RB mod N RB It may also be possible to use the following.

[0110] -Second specific example Fig. 10 is a diagram showing sub-bands according to a second specific example. In the second specific example, as shown in Fig. 10, a reserved region is provided.

[0111] Here, the reserved region is a region for securing Long PUCCH resources for each terminal device in a fixed manner. Specifically, the reserved region is used as Long PUCCH resources for a terminal device to transmit some kind of request to a base station, such as an SR (Scheduling Request) and a Beam failure recovery request, and as Long PUCCH resources for transmitting periodic CSI (Channel State Information). It is desirable that the reserved region uses RBs at both ends of the uplink system band as such Long PUCCH resources. This is to avoid a decrease in the number of consecutive RBs that can be dynamically allocated due to the uplink system band being divided by fixedly allocated resources.

[0112] Therefore, in the second specific example, as shown in FIG. 9, a total of N rsv RBIn the second example, N RBs are reserved from the uplink system band. rsv RB Number of RBs N' excluding RBs UL RB is the number of sub-bands N sb It is divided equally into N' UL RB N sb When it is not divisible by, for example, the difference in the number of RBs between subbands can be set to 1 or less by the following formula:

number

[0113] As an example, the number of RBs in the uplink system band is N UL RB is 275 and the number of sub-bands N sb is 10, and a total of 8 RBs, 4 RBs from each band edge, are reserved. In this case, according to the above formula, P' = 7. In other words, the 0th to 6th subbands are made up of 27 RBs, and the 7th to 9th subbands are made up of 26 RBs.

[0114] Also, the number of RBs per subband, N RB Here, N rsv RB Number of RBs N' excluding RBs UL RB N RB When it is not divisible by, for example, rsv RB The number of RBs in the sub-bands located at either end of the band excluding the RBs is defined as N' UL RB mod N RB It may also be possible to use the following.

[0115] - Sub-band configuration notification The number of sub-bands above, N sb or the number of RBs per subband, NRB may be notified for each cell, for each terminal device, or for each group to which the terminal device belongs. sb or the number of RBs per subband, N RB may be included in RMSI (Remaining Minimum System Information) or in an RRC message.

[0116] Furthermore, if an increase in overhead is acceptable, the starting RB position and the number of consecutive RBs may be set for each subband.

[0117] (2) Specific examples of candidate bands For example, when setting the partial band in the first terminal device (terminal device 200A), base station 100 sets the two or more candidate bands from two or more sub-bands included in the partial band. Thereafter, when the partial band set in the first terminal device (terminal device 200A) becomes active, base station 100 identifies one candidate band from the two or more candidate bands and notifies the first terminal device (terminal device 200A) of information indicating the identified candidate band as the first control information. Thereafter, the first terminal device (terminal device 200A) transmits Long PUCCH using RBs in sub-bands located on both ends of the candidate band notified by base station 100.

[0118] For example, the candidate band is the sub-band starting position SB start , and the number of consecutive sub-bands L CSBs The set value X that uniquely identifies this combination can be calculated using the following formula:

number

number

[0119] The base station 100 may notify the first terminal device (terminal device 200A) of the setting value X directly using a MAC control element and / or DCI without setting the candidate bands. In such a notification method, for example, sb When X is 10, 6 bits are required to transmit the setting value X. In particular, when the setting value X is notified using DCI, these 6 bits become a large overhead.

[0120] Therefore, the base station 100 notifies the first terminal device (terminal device 200A) in advance of the second control information for identifying the two or more candidate bands. Then, the base station 100 transmits only an index (the first control information) for identifying one candidate band from the two or more candidate bands to the first terminal device (terminal device 200A) using MAC CE and / or DCI. This makes it possible to reduce the number of bits for identifying the candidate band in which the physical uplink control channel region is located.

[0121] Next, candidate bands set for two types of terminal groups with different partial bands will be described. First, a partial band with the same bandwidth as the uplink system band is set for terminal group A, and a partial band with a bandwidth smaller than the uplink system band is set for terminal group B. As an example, when the uplink system bandwidth is 50 MHz, terminal group A is made up of multiple terminal devices with a maximum transmission bandwidth of 50 MHz, and terminal group B is made up of multiple terminal devices with a maximum transmission bandwidth of 25 MHz. For example, the first terminal device (terminal device 200A) is included in terminal group B, and the second terminal device (terminal device 200B) is included in terminal group A. Note that the partial bandwidth is equal to or less than the maximum transmission bandwidth of the terminal device, so terminal group B may include terminal devices with a maximum transmission bandwidth of 50 MHz.

[0122] Fig. 11 is a diagram showing a specific example of two or more candidate bands set for terminal group A. When eight candidate bands are set for terminal group A as shown in Fig. 11, the setting value table in Table 1 below is provided and notified as the second control information. As a method for notifying the setting value table, for example, an RRC message and / or MAC CE can be used.

[0123] [Table 1]

[0124] Base station 100 uses MAC CE and / or DCI to notify terminal group A of the index m of the candidate band in which the physical uplink control channel region is located from among these candidate bands. Since the number of bits required for this notification is 3, it is possible to reduce the number of bits compared to the case where setting value X is directly notified using 6 bits as described above.

[0125] Fig. 12 is a diagram showing a specific example of two or more candidate bands set for terminal group B. As shown in Fig. 12, when four candidate bands are set for terminal group B, for example, the setting value X can be specified by the above absolute index or the above relative index.

[0126] 12, the absolute index can identify each candidate band based on, for example, an absolute subband number that uniquely identifies each of subbands #0 to #9 included in the uplink system band, and the relative index can identify each candidate band based on, for example, a relative subband number that uniquely identifies each of subbands (#0) to (#3) included in the partial band.

[0127] When the absolute index is used, the setting value table in Table 2 below is given and notified as the second control information. start" indicates the start position based on the absolute subband number. The setting value table can be notified using, for example, an RRC message and / or MAC CE.

[0128] [Table 2]

[0129] When the relative index is used, the setting value table in Table 3 below is given and notified as the second control information. start " indicates the start position based on the relative subband number. The setting value table can be notified using, for example, an RRC message and / or MAC CE.

[0130] [Table 3]

[0131] As is clear from Tables 2 and 3, the number of bits required to notify the setting value table is 6 x 4 = 24 when using absolute indexes and 4 x 4 = 16 when using relative indexes. Therefore, when the number of bits is variable, the number of bits can be reduced by using relative indexes. On the other hand, when absolute indexes are used, there is an advantage that partial band setting and notification of the setting value table can be performed independently.

[0132] -Example of notification of candidate bands in which the physical uplink control channel area is located After the above setting value table is notified to each of the terminal groups A and B, the base station 100 notifies the terminal device of the index m of the candidate band used to transmit the HARQ-ACK information, i.e., the index m of the candidate band in which the physical uplink control channel region is located.

[0133] As a method of reporting this index m, DCI for scheduling a PDSCH corresponding to the HARQ-ACK information can be used. This allows index m to be dynamically reported for each PDSCH transmission, i.e., each HARQ-ACK information transmission, enabling flexible uplink scheduling.

[0134] Furthermore, when the DCI includes a repetition number, the system may be configured to dynamically switch index m for each number of subframes corresponding to the repetition number. Furthermore, the DCI may include control information indicating that index m is dynamically switched for each number of subframes corresponding to the repetition number. Note that index m may be different for each subframe that is repeatedly transmitted, and control information indicating this may be included in the DCI.

[0135] If dynamic control is not required, the index m may be notified using an RRC message and / or MAC CE.

[0136] Fig. 13 is a diagram showing the positions of Long PUCCHs used by terminal group A and terminal group B. In the example of notification shown in Fig. 13, it is assumed that indexes m=2, 3, and 6 are notified to terminal group A, and index m=3 is notified to terminal group B. In each of the bands with sub-band numbers (absolute sub-band numbers in the example of Fig. 13) #0 to #2, the bands with sub-band numbers #3 to #6, and the bands with sub-band numbers #7 to #9, portions other than the Long PUCCH can be used as consecutive bands that can be allocated to transmitting PUSCHs.

[0137] In this way, although terminal group A and terminal group B have different active partial bands, by using the physical uplink control channel region located in the common sub-band, all Long PUCCHs can be concentrated and allocated near the boundary of the common sub-band, which makes it possible to efficiently multiplex Long PUCCHs and suppress fragmentation of radio resources.

[0138] -Example of arrangement of physical uplink control channel regions within a sub-band or candidate band The terminal device needs to identify a subband or candidate band in which a physical uplink control channel region for transmitting HARQ-ACK information is located, as well as a relative resource number for the Long PUCCH resource within the subband or candidate band. The relative resource number may identify a relative RB number within the subband or candidate band and a resource number within the RB. The resource number within the RB may identify a cyclic shift number and / or an orthogonal cover code number applied to the Long PUCCH.

[0139] In addition, when frequency hopping is performed, the relative resource number may specify at least one of a relative position within a sub-band or candidate band of the physical uplink control channel region before frequency hopping and a relative position within a sub-band or candidate band of the physical uplink control channel region after frequency hopping.

[0140] FIG. 14 is a diagram illustrating a specific example of relative resource numbers for Long PUCCH resources within a subband or a candidate band.

[0141] This relative resource number may be implicitly determined based on information about the resource on which the PDSCH corresponding to the HARQ-ACK information is transmitted, such as the first OFDM symbol number or RB number on which the PDSCH is scheduled, the last OFDM symbol number or RB number, or any combination thereof.

[0142] Furthermore, the relative resource number may be implicitly determined based on information about the resource of the PDCCH on which the DCI for scheduling the PDSCH is transmitted. Examples of this information include the first OFDM symbol number or RB number on which the PDCCH is transmitted, the last OFDM symbol number or RB number, the first or last index of a Resource Element Group (REG), the first or last index of a Control Channel Element (CCE), or any combination thereof.

[0143] Alternatively, the relative resource number may be specified directly in the MAC CE and / or DCI.

[0144] Furthermore, some of the relative resource numbers may be directly specified in the MAC CE and / or DCI, and the remaining part may be determined by the implicit method described above.

[0145] The on / off of frequency hopping during transmission of the Long PUCCH may be specified semi-statically for each terminal, for each subband configured in the terminal, or for each candidate band, or may be specified dynamically by including a flag in the DCI indicating whether frequency hopping is on or off.

[0146] <<5. Second Embodiment>> Next, a second embodiment of the present invention will be described with reference to Figures 15 and 16. The first embodiment described above is a specific embodiment, but the second embodiment is a more generalized embodiment.

[0147] 5.1. Base station configuration An example of the configuration of the base station 100 according to the second embodiment will be described with reference to Fig. 15. Fig. 15 is a block diagram showing an example of a schematic configuration of the base station 100 according to the second embodiment. Referring to Fig. 15, the base station 100 includes a communication processing unit 150. The specific operation of the communication processing unit 150 will be described later.

[0148] The communication processing unit 150 may be implemented by one or more processors (such as a BB processor and / or other types of processors) and memory, which may be included within the one or more processors or may be external to the one or more processors.

[0149] The base station 100 may include a memory that stores a program (instructions) and one or more processors that can execute the program (instructions). The one or more processors may execute the program to perform the operations of the communication processing unit 150. The program may be a program that causes a processor to perform the operations of the communication processing unit 150.

[0150] The base station 100 may be virtualized. That is, the base station 100 may be implemented as a virtual machine. In this case, the base station 100 (virtual machine) may operate as a virtual machine on a physical machine (hardware) including a processor, a memory, etc., and a hypervisor.

[0151] Naturally, the base station 100 may further include components other than the communication processing unit 150. For example, the base station 100 may further include a wireless communication unit 110, a network communication unit 120, and / or a storage unit 130, as in the first embodiment, and / or may further include other components.

[0152] <5.2. Terminal Device Configuration> An example of the configuration of the terminal device 200 according to the second embodiment will be described with reference to Fig. 16. Fig. 16 is a block diagram showing an example of a schematic configuration of the terminal device 200 according to the second embodiment. Referring to Fig. 16, the terminal device 200 includes a communication processing unit 240. The specific operation of the communication processing unit 240 will be described later.

[0153] The communication processing unit 240 may be implemented by one or more processors (such as a BB processor and / or other types of processors) and memory. The memory may be included within the one or more processors or may be external to the one or more processors. As an example, the communication processing unit 240 may be implemented within an SoC.

[0154] The terminal device 200 may include a memory that stores a program (instructions) and one or more processors that can execute the program (instructions). The one or more processors may execute the program to perform the operations of the communication processing unit 240. The program may be a program that causes a processor to perform the operations of the communication processing unit 240.

[0155] Naturally, the terminal device 200 may further include components other than the communication processing unit 240. For example, similar to the first embodiment, the terminal device 200 may further include a wireless communication unit 210 and / or a storage unit 220, and / or may further include other components.

[0156] 5.3. Technical Features The technical features of the second embodiment will be described.

[0157] The base station 100 (communication processing unit 150) communicates with a first terminal device (terminal device 200) within a partial band used by the first terminal device (terminal device 200A) of the uplink system band, and the first terminal device (communication processing unit 240 of the terminal device 200) communicates with the base station 100 within the partial band. The partial band includes a physical uplink control channel region used by the first terminal device (terminal device 200).

[0158] This allows the first terminal device to transmit the physical uplink control channel to the base station without retuning, even if the partial bands differ depending on the terminal device. More specifically, even if the maximum transmission bandwidth of the first terminal device is small, the first terminal device can transmit the physical uplink control channel to the base station without retuning.

[0159] As an example, the description of the partial band, the physical uplink control channel region, and / or the control information is the same as that in the first embodiment. Therefore, the duplicated description will be omitted here. In this case, the communication processing unit 150 may operate in the same manner as the communication processing unit 141 in the first embodiment, and the communication processing unit 240 may operate in the same manner as the communication processing unit 231 in the first embodiment.

[0160] Naturally, the second embodiment is not limited to this example.

[0161] <<6. Other Forms>> Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. It will be understood by those skilled in the art that these embodiments are merely examples and that various modifications are possible without departing from the scope and spirit of the present invention.

[0162] For example, a device (e.g., one or more devices (or units) of a plurality of devices (or units) constituting a base station, or a module for one of the plurality of devices (or units)) may be provided that includes components of a base station described in this specification (e.g., a communication processing unit and / or an information acquisition unit). A device (e.g., a module for a terminal device) may be provided that includes components of a terminal device described in this specification (e.g., a communication processing unit). Also, a method including processing of the components may be provided, or a program for causing a processor to execute the processing of the components may be provided. Also, a non-transitory computer-readable medium on which the program is recorded may be provided. Naturally, such devices, modules, methods, programs, and non-transitory computer-readable mediums are also included in the present invention.

[0163] A part or all of the above-described embodiments can be described as, but not limited to, the following supplementary notes.

[0164] (Appendix 1) a communication processing unit that communicates with a first terminal device within a partial band used by the first terminal device of an uplink system band; A base station, wherein the partial band includes a physical uplink control channel region used by the first terminal device.

[0165] (Appendix 2) the partial band includes a plurality of physical uplink control channel regions used by the first terminal device; 2. The base station of claim 1, wherein the plurality of physical uplink control channel regions are spaced apart from one another in the frequency direction.

[0166] (Appendix 3) the uplink system band includes a plurality of sub-bands; 3. The base station according to claim 1, wherein the partial band includes one or more of the plurality of sub-bands.

[0167] (Appendix 4) 4. The base station according to claim 3, wherein each of the plurality of subbands includes a plurality of resource blocks that are contiguous in the frequency direction.

[0168] (Appendix 5) 5. The base station according to claim 3, wherein the partial band is one or more of the plurality of sub-bands.

[0169] (Appendix 6) 6. The base station according to any one of Supplementary Notes 3 to 5, wherein the physical uplink control channel region is located within a sub-band included in the partial band.

[0170] (Appendix 7) the partial band includes two or more sub-bands of the plurality of sub-bands, 7. The base station of claim 6, wherein the physical uplink control channel region is located within one of the two or more sub-bands included in the partial band.

[0171] (Appendix 8) 8. The base station of claim 7, wherein the physical uplink control channel region is located within a sub-band at an edge of the two or more sub-bands.

[0172] (Appendix 9) the partial band includes a plurality of physical uplink control channel regions used by the first terminal device; the plurality of physical uplink control channel regions include a first physical uplink control channel region and a second physical uplink control channel region separated in a frequency direction from the first physical uplink control channel region; the first physical uplink control channel region is located within one of the two or more sub-bands included in the partial band; The base station according to claim 7 or 8, wherein the second physical uplink control channel region is located in one sub-band different from the sub-band in which the first physical uplink control channel region is located among the two or more sub-bands included in the partial band.

[0173] (Appendix 10) the physical uplink control channel region is located in one of two or more candidate bands within the partial band; 8. The base station of claim 7, wherein each of the two or more candidate bands is a sub-band within the partial band, or two or more sub-bands that are consecutive in the frequency direction within the partial band.

[0174] (Appendix 11) 11. The base station of claim 7, wherein the physical uplink control channel region is located at a predetermined location within the sub-band.

[0175] (Appendix 12) 12. The base station of claim 11, wherein the predetermined location is a location at an edge of the sub-band.

[0176] (Appendix 13) 12. The base station according to claim 11, wherein the predetermined location is a predetermined distance away from an edge of the subband.

[0177] (Appendix 14) A base station as described in any one of Supplementary Notes 5 to 13, wherein the partial band used by the first terminal device includes one or more of the sub-bands included in the partial band used by a second terminal device different from the first terminal device.

[0178] (Appendix 15) The base station according to any one of Supplementary Notes 1 to 14, wherein the communication processing unit transmits first control information for identifying the physical uplink control channel region to the first terminal device.

[0179] (Appendix 16) the uplink system band includes a plurality of sub-bands; the partial band includes one or more of the plurality of sub-bands; the physical uplink control channel region is located within a sub-band included in the partial band; 16. The base station according to claim 15, wherein the first control information is control information for identifying a sub-band in which the physical uplink control channel region is located.

[0180] (Appendix 17) the partial band includes two or more of the plurality of sub-bands; the physical uplink control channel region is located in one of two or more candidate bands within the partial band; each of the two or more candidate bands is one sub-band within the partial band, or two or more sub-bands that are consecutive in a frequency direction within the partial band; the first control information is control information for identifying a candidate band in which the physical uplink control channel region is located, 17. The base station according to claim 16, wherein the communication processing unit transmits second control information for identifying the two or more candidate bands to the first terminal device.

[0181] (Appendix 18) The base station according to claim 17, wherein the communication processing unit transmits a MAC (Media Access Control) control element including the second control information to the first terminal device.

[0182] (Appendix 19) The base station according to claim 17, wherein the communication processing unit transmits an RRC (Radio Resource Control) message including the second control information to the first terminal device.

[0183] (Appendix 20) 20. A base station as claimed in any one of Supplementary Notes 17 to 19, wherein the first control information is an index for identifying a candidate band in which the physical uplink control channel region is located from among a plurality of candidate bands within the uplink system band.

[0184] (Appendix 21) A base station as described in any one of Supplementary Notes 17 to 19, wherein the first control information is an index for identifying a candidate band in which the physical uplink control channel region is located from among the two or more candidate bands within the partial band.

[0185] (Appendix 22) 22. The base station according to claim 20, wherein the communication processing unit transmits DCI (Downlink Control Information) including the index to the first terminal device.

[0186] (Appendix 23) 22. The base station according to claim 20, wherein the communication processing unit transmits a MAC (Media Access Control) control element including the index to the first terminal device.

[0187] (Appendix 24) a first terminal device, a communication processing unit that communicates with a base station within a partial band used by the first terminal device within an uplink system band; A first terminal device, wherein the partial band includes a physical uplink control channel region used by the first terminal device.

[0188] (Appendix 25) communicating with a first terminal device within a sub-band of an uplink system band used by the first terminal device; A method in which the partial band includes a physical uplink control channel region used by the first terminal device.

[0189] (Appendix 26) communicating with a base station within a sub-band of an uplink system band used by a first terminal device; A method in which the partial band includes a physical uplink control channel region used by the first terminal device.

[0190] (Appendix 27) a program that causes a processor to execute the following steps: A program, wherein the partial band includes a physical uplink control channel area used by the first terminal device.

[0191] (Appendix 28) a program that causes a processor to execute the following: communicating with a base station within a partial band used by a first terminal device within an uplink system band; A program, wherein the partial band includes a physical uplink control channel area used by the first terminal device.

[0192] (Appendix 29) a computer-readable non-transitory recording medium having a program recorded thereon that causes a processor to execute the following steps: A non-transitory recording medium, wherein the partial band includes a physical uplink control channel area used by the first terminal device.

[0193] (Appendix 30) a non-transitory computer-readable recording medium having a program recorded thereon that causes a processor to execute the following steps: A non-transitory recording medium, wherein the partial band includes a physical uplink control channel area used by the first terminal device.

[0194] (Appendix 31) a base station having a communication processing unit that communicates with a first terminal device within a partial band used by the first terminal device of an uplink system band; a first terminal device having a communication processing unit that communicates with the base station within the partial band; A system in which the partial band includes a physical uplink control channel region used by the first terminal device.

[0195] This application claims priority based on Japanese Patent Application No. 2017-149247, filed August 1, 2017, the disclosure of which is incorporated herein by reference in its entirety. [Industrial Applicability]

[0196] In a mobile communication system, regardless of the partial band used by a first terminal device, the first terminal device can transmit a physical uplink control channel to a base station without retuning. [Explanation of symbols]

[0197] 1 System 100 base stations 200 Terminal Device 141, 150, 231, 240 Communication processing unit 143 Information Acquisition Department

Claims

1. means configured to receive, via Radio Resource Control (RRC) signaling from a base station, first control information identifying a first index that is associated with a first offset according to a table from among a plurality of candidate offsets; means configured to receive a Physical Downlink Control Channel (PDCCH) carrying Downlink Control Information (DCI) from the base station; means configured to determine a second distance based on the DCI; means configured to determine a first position of a resource block for a Physical Uplink Control Channel (PUCCH) transmission based on the first offset and the second distance; means configured to perform the PUCCH transmission including Hybrid Automatic Repeat Request (HARQ)-Acknowledgement (ACK) information corresponding to the DCI at the first position of the resource block; the first position is located within an uplink bandwidth part; the first offset is independent of the DCI; the first offset indicates a first distance between a start position of the uplink Bandwidth Part and a second position; the second distance is the distance between the second position and the first position. User equipment.

2. The user equipment (10) according to claim 1, wherein the uplink bandwidth part (12) is set in the frequency domain.

3. The user equipment according to claim 1 or 2, wherein the first position is determined by adding the first offset and the second distance to the starting position of the uplink Bandwidth Part.

4. the first offset is based on a first unit of resources in the frequency domain; the resources in the first unit are defined within the uplink Bandwidth Part and are numbered from 0 to a first value minus 1; The user equipment according to claim 1 , wherein the first value is a size of the uplink Bandwidth Part.

5. The user equipment of claim 1 , wherein the plurality of candidate offset values ​​include discrete integer values.

6. The user equipment (10) according to claim 1 , wherein the starting position of the uplink Bandwidth Part corresponds to a second offset from a boundary of an uplink system band.

7. The user equipment (10) according to claim 1, wherein the uplink bandwidth part (12) is located within an uplink system band.

8. 8. The user equipment of claim 1, wherein the PUCCH transmission is performed using frequency hopping.

9. means configured to transmit, by Radio Resource Control (RRC) signaling to a user equipment, first control information identifying a first index that is associated with a first offset according to a table from among a plurality of candidate offsets; means configured to transmit a Physical Downlink Control Channel (PDCCH) carrying Downlink Control Information (DCI) to the user equipment; means configured to receive, from the user equipment, a Physical Uplink Control Channel (PUCCH) including Hybrid Automatic Repeat Request (HARQ)-Acknowledgement (ACK) information corresponding to the DCI at a first position of a resource block; the first position is located within an uplink bandwidth part; the first position is based on the first offset and a second distance; the second distance is based on the DCI; the first offset is independent of the DCI; the first offset indicates a first distance between a start position of the uplink Bandwidth Part and a second position; the second distance is the distance between the second position and the first position. Base station.

10. The base station according to claim 9 , wherein the uplink bandwidth part is set in a frequency domain.

11. The base station according to claim 9 or 10, wherein the first position is determined by adding the first offset and the second distance to the starting position of the uplink Bandwidth Part.

12. the first offset is based on a first unit of resources in the frequency domain; the resources in the first unit are defined within the uplink Bandwidth Part and are numbered from 0 to a first value minus 1; The base station according to claim 9 , wherein the first value is a size of the uplink Bandwidth Part.

13. The base station according to claim 9 , wherein the plurality of candidate offset values ​​include discrete integer values.

14. The base station according to claim 9 , wherein the starting position of the uplink Bandwidth Part corresponds to a second offset from a boundary of an uplink system band.

15. The base station according to claim 9 , wherein the uplink bandwidth part is located within an uplink system band.

16. The base station according to any one of claims 9 to 15, wherein the PUCCH is received using frequency hopping.

17. 1. A method performed by a user device, comprising: receiving, via Radio Resource Control (RRC) signaling from a base station, first control information identifying a first index associated with a first offset according to a table from among a plurality of candidate offsets; receiving a Physical Downlink Control Channel (PDCCH) carrying Downlink Control Information (DCI) from the base station; determining a second distance based on the DCI; determining a first position of a resource block for a Physical Uplink Control Channel (PUCCH) transmission based on the first offset and the second distance; performing the PUCCH transmission including Hybrid Automatic Repeat Request (HARQ)-Acknowledgement (ACK) information corresponding to the DCI at the first position of the resource block; the first position is located within an uplink bandwidth part; the first offset is independent of the DCI; the first offset indicates a first distance between a start position of the uplink Bandwidth Part and a second position; the second distance is the distance between the second position and the first position. method.

18. 1. A method performed by a base station, comprising: transmitting, by Radio Resource Control (RRC) signaling to the user equipment, first control information identifying a first index associated with a first offset according to the table from among a plurality of candidate offsets; Transmitting a Physical Downlink Control Channel (PDCCH) carrying Downlink Control Information (DCI) to the user equipment; receiving, from the user equipment, a Physical Uplink Control Channel (PUCCH) at a first position of a resource block, the Physical Uplink Control Channel (PUCCH) including Hybrid Automatic Repeat Request (HARQ)-Acknowledgement (ACK) information corresponding to the DCI; the first position is located within an uplink bandwidth part; the first position is based on the first offset and a second distance; the second distance is based on the DCI; the first offset is independent of the DCI; the first offset indicates a first distance between a start position of the uplink Bandwidth Part and a second position; the second distance is the distance between the second position and the first position. method.

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