Terminal, base station, communication method, and integrated circuit

Abstract

A terminal of the present invention includes: a circuit that generates uplink control information containing HARQ-ACK for downlink data based on a sequence selection; and a transmitter that transmits the uplink control information using a 1-symbol uplink control channel (PUCCH). The sequence for the uplink control information containing the HARQ-ACK is different from the sequence for the uplink control information containing the HARQ-ACK and a scheduling request.

Description

[0001] This application is a divisional application of Chinese invention patent application filed on April 17, 2018, with application number 201880033607.6, entitled "Terminal and Communication Method", and filed by Panasonic (USA) Intellectual Property Company. Technical Field

[0002] This invention relates to terminals, base stations, communication methods, and integrated circuits. Background Technology

[0003] With the widespread adoption of mobile bandwidth services in recent years, data services in mobile communications have increased exponentially, making the expansion of data transmission capacity a top priority for the future. Furthermore, there is an expectation of a leap forward in the development of the Internet of Things (IoT), where all "things" will be connected via the Internet. To support the diversification of IoT services, significant improvements are required not only in data transmission capacity but also in various other necessary conditions such as low latency and communication coverage. Against this backdrop, the development and standardization of 5G (5th generation mobile communication systems), which offers significantly improved performance and functionality compared to 4G, is underway.

[0004] Within 3GPP (3rd Generation Partnership Project), in the standardization of 5G, there is a push to develop New Radio (RAT) technologies that may not be backward compatible with advanced LTE (Long Term Evolution).

[0005] In NR, the research terminal (UE: User Equipment) uses the uplink control channel (PUCCH: Physical Uplink Control Channel) to send uplink control information (UCI) to the base station (eNG or gNB), including response signals (ACK / NACK: Acknowledgement / Negative Acknowledgement; HARQ-ACK) indicating the error detection results of downlink data, downlink channel state information (CSI: Channel State Information), and uplink radio resource allocation requests (SR: Scheduling Request).

[0006] Furthermore, in NR, research is being conducted on including 1-2 bits of UCI in the PUCCH for transmission.

[0007] Furthermore, NR supports "short PUCCH" which transmits PUCCH using 1 or 2 symbols within 1 time slot, and "long PUCCH" which transmits PUCCH using 3 or more symbols (for example, the minimum number of symbols can also be set to 4 symbols). Hereinafter, short PUCCH which transmits PUCCH using 1 symbol will be referred to as "1-symbol PUCCH".

[0008] Existing technical documents

[0009] Non-patent literature

[0010] Non-patent literature 1: 3GPP TS 36.211V13.4.0, "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation (Release 13)," December 2016.

[0011] Non-patent literature 2: 3GPP TS 36.212V13.4.0, "Evolved Universal Terrestrial Radio Access (E-UTRA); Multiplexing and channel coding (Release 13)," December 2016.

[0012] Non-patent literature 3: 3GPP TS 36.213V13.4.0, "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures (Release 13)," December 2016. Summary of the Invention

[0013] However, methods for sending SRs in a 1-symbol PUCCH have not been sufficiently studied.

[0014] One aspect of the present invention helps to provide a terminal and communication method that can appropriately transmit SR in a 1-symbol PUCCH.

[0015] One embodiment of the present invention includes a terminal comprising: circuitry for generating uplink control information containing HARQ-ACK for downlink data based on sequence selection; and a transmitter for transmitting the uplink control information using a 1-symbol uplink control channel, i.e., PUCCH. The sequence of uplink control information containing the HARQ-ACK differs from the sequence of uplink control information containing both the HARQ-ACK and a scheduling request.

[0016] One aspect of the base station of the present invention includes: a transmitting unit for transmitting downlink data to a terminal; and a receiver for receiving uplink control information, including HARQ-ACK for the downlink data, transmitted from the terminal using a 1-symbol uplink control channel (PUCCH), wherein the uplink control information including the HARQ-ACK is based on sequence selection. The sequence of the uplink control information including the HARQ-ACK differs from the sequence of the uplink control information including the HARQ-ACK and a scheduling request.

[0017] One aspect of the communication method of the present invention includes the steps of: generating uplink control information containing HARQ-ACK for downlink data based on sequence selection; and transmitting the uplink control information using a 1-symbol uplink control channel, i.e., PUCCH. The sequence containing the uplink control information differs from the sequence containing the uplink control information and a scheduling request.

[0018] One aspect of the communication method of the present invention includes the steps of: transmitting downlink data to a terminal; and receiving uplink control information, including HARQ-ACK for the downlink data, transmitted from the terminal using a 1-symbol uplink control channel, i.e., PUCCH. The uplink control information including the HARQ-ACK is sequence-selected, and the sequence for the uplink control information including the HARQ-ACK differs from the sequence for the uplink control information including the HARQ-ACK and a scheduling request.

[0019] One aspect of the integrated circuit control of the present invention involves the following processes: generating uplink control information containing HARQ-ACK for downlink data based on sequence selection; and transmitting the uplink control information using a 1-symbol uplink control channel, i.e., PUCCH. The sequence containing the uplink control information differs from the sequence containing both the HARQ-ACK and a scheduling request.

[0020] One aspect of the integrated circuit control of the present invention involves the following processes: transmitting downlink data to a terminal; and receiving uplink control information, including HARQ-ACK for the downlink data, transmitted from the terminal using a 1-symbol uplink control channel (PUCCH). The uplink control information including the HARQ-ACK is sequence-selected, and the sequence for the uplink control information including the HARQ-ACK differs from the sequence for the uplink control information including the HARQ-ACK and a scheduling request.

[0021] One aspect of the present invention includes a terminal comprising: circuitry that, among multiple modes of channel structure relating to an uplink control channel, allocates uplink control information, containing at least one of a response signal for downlink data and an uplink radio resource allocation request signal, to resources of the uplink control channel based on a mode selected according to the terminal's operating environment; and a transmitter that transmits the uplink control information.

[0022] A terminal according to one aspect of the present invention includes: circuitry that, in the event of simultaneously transmitting a response signal for downlink data and transmitting an uplink radio resource allocation request signal, allocates uplink control information containing at least one of the response signal and the radio resource allocation request signal to resources of the uplink control channel, based on a mode selected according to the terminal's operating environment, among multiple modes of the channel structure relating to the uplink control channel; and a transmitter that transmits the uplink control information.

[0023] A terminal according to one aspect of the present invention includes: circuitry for allocating uplink control information, containing at least one of a response signal for downlink data and an uplink radio resource allocation request signal, to resources of an uplink control channel; and a transmitter for transmitting the uplink control information, wherein, for the terminal, a first resource is allocated for transmitting the response signal, a second resource is allocated for transmitting the radio resource allocation request signal, and a third resource is allocated for transmitting a reference signal frequency multiplexed with the uplink control information; the transmitter uses one of the first resource and the second resource, and the third resource, to transmit the uplink control information and the reference signal, wherein the first resource and the second resource are allocated to the same resource block.

[0024] One aspect of the communication method of the present invention includes the following steps: among multiple modes of the channel structure of the uplink control channel, based on a mode selected according to the operating environment of the terminal, uplink control information containing at least one of a response signal for downlink data and an uplink radio resource allocation request signal is allocated to the resources of the uplink control channel, and the uplink control information is transmitted.

[0025] One aspect of the communication method of the present invention includes the following steps: when a response signal for downlink data and a radio resource allocation request signal for uplink are simultaneously transmitted, among multiple modes of the channel structure of the uplink control channel, based on a mode selected according to the operating environment of the terminal, uplink control information containing at least one of the response signal and the radio resource allocation request signal is allocated to the resources of the uplink control channel, and the uplink control information is transmitted.

[0026] One aspect of the communication method of the present invention includes the following steps: allocating uplink control information containing at least one of a response signal for downlink data and an uplink radio resource allocation request signal to resources of an uplink control channel; transmitting the uplink control channel; for a terminal, allocating a first resource for transmitting the response signal, a second resource for transmitting the radio resource allocation request signal, and a third resource for transmitting a reference signal frequency multiplexed with the uplink control information; using one of the first resource and the second resource, and the third resource, transmitting the uplink control information and the reference signal; wherein the first resource and the second resource are allocated to the same resource block.

[0027] Furthermore, these general or specific methods can be implemented through systems, methods, integrated circuits, computer programs, or storage media, or through any combination of systems, devices, methods, integrated circuits, computer programs, and storage media.

[0028] Invention Effects

[0029] According to one aspect of the invention, the SR can be appropriately transmitted in the 1-symbol PUCCH.

[0030] Further advantages and effects of one aspect of the invention will become clear from the specification and drawings. These advantages and / or effects can be provided separately by several embodiments and the features described in the specification and drawings, without the need to provide all features in order to obtain one or more of the same features. Attached Figure Description

[0031] Figure 1 An example of a channel structure representing a 1-symbol PUCCH with option 1.

[0032] Figure 2 This is an example of a channel structure representing a 1-symbol PUCCH with option 4.

[0033] Figure 3 This is an example of a channel structure that represents a 1-symbol PUCCH with a 1-to-1 selection.

[0034] Figure 4 This is an example of a channel structure representing a 1-symbol PUCCH with selections of 1-2.

[0035] Figure 5 This is an example of a channel structure that selects a 4-1 1-symbol PUCCH.

[0036] Figure 6 This is an example of a channel structure that selects a 4-2 1-symbol PUCCH.

[0037] Figure 7 An example representing the number of sequences transmitted simultaneously and the number of sequences allocated to each UE.

[0038] Figure 8 This represents a portion of the structure of the terminal in Implementation Method 1.

[0039] Figure 9 This shows the structure of the base station in Implementation Method 1.

[0040] Figure 10 This shows the structure of the terminal in Implementation Method 1.

[0041] Figure 11 This indicates the processing of the terminal in Implementation Method 1.

[0042] Figure 12 This illustrates an example of mode switching in the channel structure related to the 1-symbol PUCCH in Implementation 1.

[0043] Figure 13 This illustrates an example of mode switching in the channel structure related to the 1-symbol PUCCH in Implementation 2.

[0044] Figure 14 An example of the channel structure of the 1-symbol PUCCH in Implementation 3.

[0045] Figure 15 An example of a channel structure pattern relating to the 1-symbol PUCCH in Implementation 3.

[0046] Figure 16 This is an example of mode switching of the channel structure related to the 1-symbol PUCCH, representing a variation of Implementation 3.

[0047] Figure 17 An example of a sequence group representing implementation method 4.

[0048] Figure 18 An example of the channel structure of the PUCCH, representing a variation of Implementation 5. Detailed Implementation

[0049] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0050] [Channel structure of 1-symbol PUCCH]

[0051] In the 1-symbol PUCCH, the following two channel structures are studied.

[0052] like Figure 1 As shown, the first channel structure is a method of frequency division multiplexing (FDM) of the UCI and the reference signal (RS) (hereinafter referred to as "Selection 1"). In Selection 1, BPSK or QPSK modulation is performed based on 1-bit or 2-bit UCI. The modulated signal (UCI) and the reference signal are mapped onto subcarriers (REs) via FDM.

[0053] In Option 1, resource utilization efficiency does not depend on the number of UCI bits. For example, when using a CAZAC code sequence as the sequence for transmitting the UCI (hereinafter referred to as the "UCI sequence") and the sequence for transmitting the reference signal (hereinafter referred to as the "RS sequence"), and using cyclic shifting for orthogonal multiplexing between users (UEs), in Figure 1 In the example shown, a maximum of 6 UEs can be multiplexed in 1 PRB (12 RE). On the other hand, option 1 transmits UCI and RS using OFDM (Orthogonal Frequency Division Multiplexing) with FDM, so the maximum transmit power to average power ratio (PAPR) becomes larger.

[0054] like Figure 2 As shown, the second channel structure is a sequence selection method (hereinafter referred to as "Selection 4") based on 1-bit or 2-bit UCI. In Selection 4, for example, Figure 2 As shown, the cyclic shift (CS) of the CAZAC (Constant Amplitude Zero Auto Correlation) code sequence can be used for sequence selection.

[0055] In option 4, resource utilization efficiency varies depending on the number of UCI bits. For example, in Figure 2In the example shown, when transmitting 1 bit of UCI, each UE needs to be allocated 2 sequences, so in option 4, a maximum of 6 UEs can be multiplexed in 1 PRB (12 RE). On the other hand, when transmitting 2 bits of UCI, each UE needs to be allocated 4 sequences, so the maximum number of UEs that can be multiplexed in 1 PRB is 3, which is a degraded resource utilization efficiency compared to the case of transmitting 1 bit of UCI. On the other hand, selecting option 4, which transmits 1 sequence, can achieve single-carrier transmission, thus reducing PAPR.

[0056] For a 1-symbol PUCCH that transmits 1 or 2 bits of UCI, the above two channel structures (selection 1 and selection 4) are studied. However, these channel structures, as UCI, mainly focus on HARQ-ACK and do not consider the transmission of SR.

[0057] Furthermore, sometimes SR and HARQ-ACK transmissions occur simultaneously in the terminal. In this case, it's also possible for the terminal to not send either HARQ-ACK or SR (discarding them), but this would increase latency. In NR, the 1-symbol PUCCH was originally introduced to reduce latency, so discarding HARQ-ACK or SR would not fully utilize NR's low latency capabilities. Therefore, simultaneous transmission of SR and HARQ-ACK is essential in NR. In 1-symbol PUCCHs that transmit 1 or 2 bits of UCI, the simultaneous transmission of SR and HARQ-ACK needs to be thoroughly studied.

[0058] Therefore, in one aspect of the present invention, a method is described in which, in addition to the transmission of HARQ-ACK, SR is appropriately transmitted, and SR and HARQ-ACK are transmitted simultaneously in a 1-symbol PUCCH.

[0059] [Channel structure for transmitting SR and HARQ-ACK in 1-symbol PUCCH]

[0060] In a 1-symbol PUCCH that transmits 1 or 2 bits of UCI, if SR and HARQ-ACK are transmitted simultaneously, and the terminal transmits HARQ-ACK and SR simultaneously, the following two methods can be used for each of the channel structures of option 1 and option 4 mentioned above.

[0061] The first method is that, in the case where SR and HARQ-ACK are sent simultaneously, the terminal uses the resources allocated for the respective transmission of SR and HARQ-ACK to simultaneously send SR and HARQ-ACK.

[0062] The second method is to send HARQ-ACK using the resources allocated for sending SR when both SR and HARQ-ACK are sent simultaneously.

[0063] The following details the application of the two methods to options 1 and 4 respectively. Furthermore, the application of the first method to option 1 will be referred to as "Option 1-1", and the application of the second method to option 1 will be referred to as "Option 1-2". Similarly, the application of the first method to option 4 will be referred to as "Option 4-1", and the application of the second method to option 4 will be referred to as "Option 4-2".

[0064] [Choose 1-1( Figure 3 )]

[0065] In option 1-1, the PUCCH resources used by the terminal to send HARQ-ACK and SR respectively are guaranteed. Hereinafter, the PUCCH resources used for HARQ-ACK will be referred to as "HARQ-ACK resources", and the PUCCH resources used for SR will be referred to as "SR resources".

[0066] When there is no SR transmission but a HARQ-ACK transmission, the terminal uses the HARQ-ACK resource to send the HARQ-ACK. Furthermore, when there is an SR transmission but no HARQ-ACK transmission, the terminal uses the SR resource to send the SR. Additionally, when both SR and HARQ-ACK transmissions occur simultaneously, the terminal uses both SR and HARQ-ACK resources to send both simultaneously. In this case, the HARQ-ACK resource is used to send the HARQ-ACK, and the SR resource is used to send the SR.

[0067] Figure 3 This represents an example of PUCCH resources (#0 to #23) in option 1-1, where the PUCCH resource size is set to 1 PRB, the CAZAC code sequence is used as the UCI sequence and RS sequence, and orthogonal multiplexing between PUCCH resources is performed using cyclic shift.

[0068] exist Figure 3In this configuration, for a terminal, PUCCH resource #0 (PRB #0, cyclic shift #0) is allocated as the SR resource, and PUCCH resource #12 (PRB #2, cyclic shift #0) is allocated as the HARQ-ACK resource. Therefore, when transmitting without SR but with HARQ-ACK, the terminal uses PUCCH resource #12 (HARQ-ACK resource) to transmit HARQ-ACK; when transmitting with SR but without HARQ-ACK, it uses PUCCH resource #0 (SR resource) to transmit SR; and when transmitting both SR and HARQ-ACK simultaneously, it uses both PUCCH resource #0 (SR resource) and PUCCH resource #12 (HARQ-ACK resource) to transmit SR and HARQ-ACK respectively.

[0069] In option 1-1, the number of PUCCH resources allocated to each UE is 2 (e.g., Figure 3 The values ​​in the image are PUCCH resources #0 and #12. However, when the SR is in either "SR present" or "SR absent" state, SR can be sent via On / Off keying, allowing two UEs to multiplex the same PUCCH resource on both the real and imaginary axes. In this case, the number of PUCCH resources allocated to each UE can be considered as 1.5.

[0070] Furthermore, in the anticipated option 1-1, if SR and HARQ-ACK are sent simultaneously, the terminal needs to use two PUCCH resources to send signals at the same time, so PAPR is very high.

[0071] [Choose 1-2( Figure 4 )]

[0072] In option 1-2, similar to option 1-1, HARQ-ACK resources and SR resources are guaranteed for the terminal.

[0073] When there is no SR transmission but a HARQ-ACK transmission, the terminal uses the HARQ-ACK resources to send the HARQ-ACK. Furthermore, when there is an SR transmission but no HARQ-ACK transmission, the terminal uses the SR resources to send the SR. On the other hand, when both SR and HARQ-ACK transmissions occur simultaneously, unlike option 1-1, the terminal uses the SR resources to send the HARQ-ACK.

[0074] The base station determines whether HARQ-ACK resources have been transmitted using blind detection methods such as power determination. If it is determined that HARQ-ACK was transmitted using SR resources, the base station determines "SR present" and uses the SR resource signal for HARQ-ACK decoding. Conversely, if it is determined that HARQ-ACK was transmitted using HARQ-ACK resources, the base station determines "no SR present" and uses the HARQ-ACK resources for HARQ-ACK decoding.

[0075] Figure 4 This represents an example of PUCCH resources (#0 to #23) in option 1-2, where the PUCCH resource size is set to 1 PRB, the CAZAC code sequence is used as the UCI sequence and RS sequence, and orthogonal multiplexing between PUCCH resources is performed using cyclic shift.

[0076] exist Figure 4 In, with Figure 3 Similarly, for the terminal, PUCCH resource #0 (PRB #0, cyclic shift #0) is allocated as the SR resource, and PUCCH resource #12 (PRB #2, cyclic shift #0) is allocated as the HARQ-ACK resource. When transmitting without SR but with HARQ-ACK, the terminal uses PUCCH resource #12 (HARQ-ACK resource) to send HARQ-ACK; when transmitting with SR but without HARQ-ACK, it uses PUCCH resource #0 (SR resource) to send SR; and when transmitting both SR and HARQ-ACK simultaneously, it uses PUCCH resource #0 (SR resource) to send HARQ-ACK.

[0077] In option 1-2, the number of PUCCH resources allocated to each UE is 2 (e.g., Figure 4 (The middle part contains PUCCH resources #0 and #12).

[0078] [Choose 4-1( Figure 5 )]

[0079] In option 4-1, with 1 bit UCI, the PUCCH resources used by the terminal to send ACK, NACK, and SR respectively are guaranteed. Hereinafter, the PUCCH resources used for ACK will be referred to as "ACK resources", the PUCCH resources used for NACK will be referred to as "NACK resources", and the PUCCH resources used for SR will be referred to as "SR resources".

[0080] When there is no SR transmission but a HARQ-ACK transmission, the terminal uses either the ACK or NACK resource to send the HARQ-ACK (ACK or NACK). Furthermore, when there is an SR transmission but no HARQ-ACK transmission, the terminal uses the SR resource to send the SR. Additionally, when both SR and HARQ-ACK transmissions occur simultaneously, the terminal uses either the ACK or NACK resource and two PUCCH resources of the SR resource to simultaneously send the HARQ-ACK (ACK or NACK) and the SR. In this case, the ACK or NACK resource is used to send the HARQ-ACK, and the SR resource is used to send the SR.

[0081] The base station determines whether HARQ-ACK (ACK or NACK) resources have been transmitted using blind detection methods such as power determination. Specifically, the base station determines ACK if it determines that a signal has been transmitted using ACK resources, and NACK if it determines that a signal has been transmitted using NACK resources. Furthermore, the base station determines SR resources using blind detection methods such as power determination, and determines "SR present" if it determines that a signal has been transmitted using SR resources.

[0082] Figure 5 This represents an example of PUCCH resources (#0 to #47) in option 4-1, where the PUCCH resource size is set to 1 PRB, a CAZAC code sequence is used, and orthogonal multiplexing between PUCCH resources is performed using cyclic shifting.

[0083] exist Figure 5 In this configuration, for a terminal, PUCCH resource #0 (PRB #0, cyclic shift #0) is allocated as the SR resource, PUCCH resource #24 (PRB #2, cyclic shift #0) is allocated as the ACK resource, and PUCCH resource #30 (PRB #2, cyclic shift #6) is allocated as the NACK resource. Therefore, when transmitting without SR but with HARQ-ACK, the terminal uses PUCCH resource #24 (ACK resource) or PUCCH resource #30 (NACK resource) to transmit HARQ-ACK (ACK or NACK). When transmitting with SR but without HARQ-ACK, the terminal uses PUCCH resource #0 (SR resource) to transmit SR. When transmitting SR and HARQ-ACK simultaneously, the terminal uses either PUCCH resource #24 or PUCCH resource #30, along with PUCCH resource #0 (SR resource), to transmit HARQ-ACK (ACK or NACK) and SR, respectively.

[0084] Furthermore, in option 4-1, with 2-bit UCI, the PUCCH resources in the terminal used for sending ACK / ACK, ACK / NACK, NACK / ACK, NACK / NACK, and SR are respectively guaranteed (not shown).

[0085] In other words, in option 4-1, the number of PUCCH resources allocated to each UE is 3 in the case of 1 bit UCI (e.g., Figure 5 The PUCCH resources are #0, #24, and #30, and there are 5 in the case of 2-bit UCI.

[0086] Furthermore, in the anticipated option 4-1, when SR and HARQ-ACK are sent simultaneously, the terminal needs to use two PUCCH resources to send signals simultaneously, thus increasing PAPR.

[0087] [Choose 4-2( Figure 6 )]

[0088] In option 4-2, with 1 bit UCI, the PUCCH resources for the terminal to send ACK without SR, NACK without SR, ACK with SR, and NACK with SR are guaranteed. Hereinafter, the PUCCH resources used for ACK without SR will be referred to as "ACK resources without SR", the PUCCH resources used for NACK without SR will be referred to as "NACK resources without SR", the PUCCH resources used for ACK with SR will be referred to as "ACK resources with SR", and the PUCCH resources used for NACK with SR will be referred to as "NACK resources with SR".

[0089] In the case of sending without SR but with HARQ-ACK, the terminal uses either the ACK resource without SR or the NACK resource without SR to send HARQ-ACK (ACK or NACK). Furthermore, in the case of sending with SR but without HARQ-ACK, the terminal uses the NACK resource with SR (or possibly the ACK resource with SR) to send SR. On the other hand, in the case of simultaneous sending of SR and HARQ-ACK, the terminal uses either the ACK resource with SR or the NACK resource with SR to send HARQ-ACK.

[0090] The base station uses blind detection methods, such as power determination, to determine ACK resources without SR, NACK resources without SR, ACK resources with SR, and NACK resources with SR. Specifically, if it is determined that a signal will be transmitted using ACK resources without SR, the base station determines it as ACK, and thus determines it as "no SR". Similarly, if it is determined that a signal will be transmitted using NACK resources without SR, the base station determines it as NACK, and thus determines it as "no SR". Likewise, if it is determined that a signal will be transmitted using ACK resources with SR, the base station determines it as ACK, and thus determines it as "with SR". Finally, if it is determined that a signal will be transmitted using NACK resources with SR, the base station determines it as NACK, and thus determines it as "with SR".

[0091] Figure 6 This represents an example of PUCCH resources (#0 to #47) in option 4-2, where the PUCCH resource size is set to 1 PRB, a CAZAC code sequence is used, and orthogonality between PUCCH resources is achieved using cyclic shifting.

[0092] exist Figure 6 In this context, for a terminal, PUCCH resource #0 (PRB#0, cyclic shift #0) is allocated as an ACK resource with SR, PUCCH resource #6 (PRB#0, cyclic shift #6) is allocated as a NACK resource with SR, PUCCH resource #24 (PRB#2, cyclic shift #0) is allocated as an ACK resource without SR, and PUCCH resource #30 (PRB#2, cyclic shift #6) is allocated as a NACK resource without SR.

[0093] In other words, Figure 6 In the case of sending HARQ-ACK without SR, the terminal uses PUCCH resource #24 (ACK resource without SR) or PUCCH resource #30 (NACK resource without SR) to send HARQ-ACK (ACK or NACK). When sending SR but without HARQ-ACK, the terminal uses PUCCH resource #6 (NACK resource with SR) (or PUCCH resource #0) to send SR. When sending SR and HARQ-ACK simultaneously, the terminal uses PUCCH resource #0 (ACK resource with SR) or PUCCH resource #6 (NACK resource with SR) to send HARQ-ACK (ACK or NACK).

[0094] Furthermore, in option 4-2, with 2-bit UCI, the PUCCH resources in the terminal frame used to send ACK / ACK without SR, ACK / NACK without SR, NACK / ACK without SR, NACK / NACK without SR, and ACK / ACK with SR, ACK / NACK with SR, NACK / ACK with SR, and NACK / NACK with SR are guaranteed (not shown).

[0095] In other words, in option 4-2, the number of PUCCH resources allocated to each UE is 4 in the case of 1 bit UCI. Figure 6 The PUCCH resources are #0, #6, #24, and #30, which are 8 in the case of 2-bit UCI.

[0096] Furthermore, in option 4-2, when both SR and HARQ-ACK are sent, one PUCCH resource is used to send the signal, so there is no increase in PAPR.

[0097] The above explains options 1-1, 1-2, 4-1, and 4-2.

[0098] [Noise power-limited environment and interference power-limited environment]

[0099] Generally, in cellular systems, it is assumed that the system is used under two scenarios: "noise power limited environment" and "interference power limited environment".

[0100] In noise-power-constrained environments, such as those at the edge of a cell, the transmission power is strictly limited, so a transmission method that avoids increasing PAPR is required.

[0101] On the other hand, interference power limiting environments are a solution where resource utilization efficiency takes precedence over transmit power limiting.

[0102] [The relationship between PAPR and resource utilization efficiency]

[0103] In Option 1 (including Option 1-1 and Option 1-2) mentioned above, CAZAC code sequences are used as the UCI sequence and RS sequence, respectively. If we consider that the UCI sequence is modulated by BPSK or QPSK through UCI, it can be regarded as two sequences being allocated in one PUCCH resource. That is, both Option 1 and Option 4 can be considered from the perspective of sequence selection and sequence transmission.

[0104] If we consider selection 1 and selection 4 from the perspective of sequence selection and sequence transmission, then the number of transmission sequences for selection 1-1, selection 1-2, selection 4-1, and selection 4-2, and the number of sequences allocated to each UE, are as follows: Figure 7 The data shown is summarized below.

[0105] As mentioned above, in option 1-1, HARQ-ACK and SR resources are guaranteed. In this case, each resource in the HARQ-ACK and SR pools contains two sequences: a UCI sequence and an RS sequence. Therefore, in option 1-1, the required number of sequences per UE is 4 (refer to...). Figure 7 However, in the two states of "SR present" and "SR absent", on / off keying can be used to send SR, allowing two UEs to multiplex the same SR sequence on both the real and imaginary axes. In this case, in selection 1-1, the number of sequences allocated to each UE can be considered as 3.5 (see reference). Figure 7 ).

[0106] Furthermore, in option 1-1, in the case of no SR transmission and HARQ-ACK transmission (HARQ-ACK only), the terminal uses the HARQ-ACK resource to transmit HARQ-ACK, thus simultaneously transmitting two sequences: the UCI sequence and the RS sequence (see reference). Figure 7 Furthermore, in the case of SR transmission without HARQ-ACK transmission (SR only), the terminal uses SR resources to transmit SR, thus simultaneously transmitting two sequences: the SR sequence and the RS sequence (see [reference]). Figure 7 Furthermore, in the case of simultaneous SR and HARQ-ACK transmission (HARQ+SR), the terminal uses both HARQ-ACK and SR resources to send HARQ-ACK and SR respectively. Therefore, a total of four sequences are sent simultaneously: the UCI sequence, the RS sequence used for HARQ-ACK, the SR sequence, and the RS sequence used for SR (see reference). Figure 7 ).

[0107] In option 1-2, HARQ-ACK and SR resources are secured. In this case, each of the HARQ-ACK and SR resources contains two sequences: a UCI sequence and an RS sequence. Therefore, in option 1-2, the number of sequences allocated to each UE is 4 (refer to...). Figure 7 ).

[0108] Furthermore, in options 1-2, when there is no SR transmission but HARQ-ACK transmission, the terminal uses HARQ-ACK resources to transmit HARQ-ACK, thus simultaneously transmitting two sequences: the UCI sequence and the RS sequence (see reference). Figure 7 Furthermore, in the case of SR transmission without HARQ-ACK transmission, the terminal uses SR resources to transmit SR, thus simultaneously transmitting two sequences: the SR sequence and the RS sequence (see reference). Figure 7 Furthermore, in the case of simultaneous SR and HARQ-ACK transmission, the terminal uses SR resources to transmit HARQ-ACK, thus simultaneously transmitting two sequences: the UCI sequence and the RS sequence (see [reference]). Figure 7 ).

[0109] In option 4-1, with a 1-bit UCI, ACK, NACK, and SR resources are guaranteed. Furthermore, with a 2-bit UCI, ACK / ACK, ACK / NACK, NACK / ACK, NACK / NACK, and the PUCCH resource used for sending SR are guaranteed. In this case, each resource contains one sequence. Therefore, in option 4-1, with a 1-bit UCI, the number of sequences allocated to each UE is 3, and with a 2-bit UCI, the number of sequences allocated to each UE is 5 (see reference). Figure 7 ).

[0110] Furthermore, in option 4-1, when there is no SR transmission but HARQ-ACK transmission, the terminal uses either ACK or NACK resources to send HARQ-ACK, so one sequence is sent (see reference). Figure 7 Furthermore, in the case of SR transmission without HARQ-ACK, the terminal uses SR resources to transmit SR, thus transmitting one sequence (see [reference]). Figure 7 Furthermore, in the case of simultaneous SR and HARQ-ACK transmission, the terminal uses either the ACK or NACK resource and the two PUCCH resources of the SR resource to simultaneously transmit HARQ-ACK and SR, thus transmitting two sequences: the ACK or NACK sequence and the SR sequence (see reference). Figure 7 ).

[0111] In option 4-2, with a 1-bit UCI, ACK resources without SR, NACK resources without SR, ACK resources with SR, and NACK resources with SR are guaranteed. Furthermore, with a 2-bit UCI, PUCCH resources in the terminal for transmitting ACK / ACK without SR, ACK / NACK without SR, NACK / ACK without SR, NACK / NACK without SR, ACK / ACK with SR, ACK / NACK with SR, NACK / ACK with SR, and NACK / NACK with SR are guaranteed. Therefore, in option 4-2, with a 1-bit UCI, the number of sequences allocated to each UE is 4, and with a 2-bit UCI, the number of sequences allocated to each UE is 8 (see reference). Figure 7 ).

[0112] Furthermore, in option 4-2, when transmitting without SR and transmitting with HARQ-ACK, the terminal uses either the ACK resource without SR or the NACK resource without SR to transmit HARQ-ACK, thus transmitting one sequence (see reference). Figure 7 Furthermore, in the case of sending SR but not HARQ-ACK, the terminal uses the NACK resource with SR (or it can also use the ACK resource with SR) to send SR, so it sends one sequence (see [reference]). Figure 7 Furthermore, in the case of simultaneous SR and HARQ-ACK transmission, the terminal uses either the ACK resource with SR or the NACK resource with SR to send the HARQ-ACK, thus sending one sequence (see reference). Figure 7 ).

[0113] exist Figure 7 In this context, comparing options 1-1, 1-2, 4-1, and 4-2, it can be said that the more sequences transmitted simultaneously, the higher the PAPR. Conversely, regarding resource utilization efficiency (the number of sequences allocated to each UE), the more sequences transmitted simultaneously, the better the resource utilization efficiency. For example, in option 1-1, compared to other options, although resource utilization efficiency is good, PAPR is higher. On the other hand, in option 4-2, compared to other options, although PAPR is lower, resource utilization efficiency is worse.

[0114] Thus, from the perspective of the number of sequences sent simultaneously, there is a trade-off between PAPR and resource utilization efficiency.

[0115] In one aspect of the invention, considering the preferred features (PAPR or resource utilization efficiency) in the above-mentioned cellular system schemes (noise power limited environment or interference power limited environment), and Figure 7 The trade-off between PAPR and resource utilization efficiency is shown, and the channel structure of 1-symbol PUCCH is set.

[0116] The following describes each implementation method in detail.

[0117] (Implementation Method 1)

[0118] [Overview of Communication Systems]

[0119] The communication system of various embodiments of the present invention includes a base station 100 and a terminal 200.

[0120] Figure 8 This is a block diagram illustrating the structure of a portion of the terminal 200 according to various embodiments of the present invention. Figure 8In the terminal 200 shown, the signal allocation unit 215 allocates uplink control information (UCI) containing at least one of a downlink data response signal (HARQ-ACK) and an uplink radio resource allocation request signal (SR) to the uplink control channel resources (PUCCH resources) based on a mode selected according to the operating environment of the terminal 200 among multiple modes (selections) of the channel structure of the uplink control channel (1-symbol PUCCH), and the transmission unit 217 transmits the uplink control information.

[0121] [Base station structure]

[0122] Figure 9 This is a block diagram illustrating the structure of the base station 100 according to Embodiment 1 of the present invention. Figure 9 In this system, base station 100 includes: control unit 101, data generation unit 102, encoding unit 103, retransmission control unit 104, modulation unit 105, high-order control signal generation unit 106, encoding unit 107, modulation unit 108, downlink control signal generation unit 109, encoding unit 110, modulation unit 111, signal distribution unit 112, IFFT (Inverse Fast Fourier Transform) unit 113, transmission unit 114, antenna 115, reception unit 116, FFT (Fast Fourier Transform) unit 117, extraction unit 118, SR detection unit 119, PUCCH demodulation and decoding unit 120, and decision unit 121.

[0123] Control unit 101 determines the radio resource allocation for downlink signals (e.g., PDSCH: Physical Downlink Shared Channel) and outputs downlink resource allocation information indicating the resource allocation of downlink signals to downlink control signal generation unit 109 and signal allocation unit 112.

[0124] In addition, the control unit 101 determines the allocation of PUCCH resources (time, frequency, sequence, etc.) for transmitting the HARQ-ACK signal to the downlink signal, and outputs the PUCCH resource allocation information indicating the allocation of PUCCH resources for HARQ-ACK to the downlink control signal generation unit 109 and the extraction unit 118.

[0125] In addition, the control unit 101 determines the allocation of PUCCH resources (time (including periodicity), frequency, sequence, etc.) for transmitting SR, and outputs the PUCCH resource allocation information indicating the allocation of PUCCH resources for SR to the high-level control signal generation unit 106 and the extraction unit 118.

[0126] At this time, when using the above-mentioned PUCCH channel structure, the control unit 101 determines the PUCCH resources (sequence) for transmitting RS, the PUCCH resources (sequence) for transmitting HARQ-ACK signals, or the PUCCH resources (sequence) for transmitting SR, and outputs the determined PUCCH resource information to the high-order control signal generation unit 106 or the downlink control signal generation unit 109.

[0127] Furthermore, the control unit 101 determines information regarding the PUCCH channel structure mode (e.g., selection 1-1, 1-2, 4-1, 4-2) and outputs the determined PUCCH mode information to the high-order control signal generation unit 106 or the downlink control signal generation unit 109. Moreover, if the information regarding the PUCCH mode is not explicitly communicated to the terminal 200, the determined PUCCH mode information is not output to the high-order control signal generation unit 106 or the downlink control signal generation unit 109.

[0128] The data generation unit 102 generates downlink data for the terminal 200 and outputs it to the encoding unit 103.

[0129] The encoding unit 103 performs error correction encoding on the downlink data input from the data generation unit 102 and outputs the encoded data signal to the retransmission control unit 104.

[0130] During the initial transmission, the retransmission control unit 104 retains the encoded data signal input from the encoding unit 103 and outputs it to the modulation unit 105. Furthermore, if a NACK for the transmitted data signal is input from the determination unit 121 (described later), the retransmission control unit 104 outputs the corresponding retained data to the modulation unit 105. Conversely, if an ACK for the transmitted data signal is input from the determination unit 121, the retransmission control unit 104 deletes the corresponding retained data.

[0131] The modulation unit 105 modulates the data signal input from the retransmission control unit 104 and outputs the data modulation signal to the signal distribution unit 112.

[0132] The high-level control signal generation unit 106 uses the control information (PUCCH resource allocation information or PUCCH mode information, etc.) input from the control unit 101 to generate a control information bit string, and outputs the generated control information bit string to the encoding unit 107.

[0133] The encoding unit 107 performs error correction encoding on the control information bit string input from the high-bit control signal generation unit 106, and outputs the encoded control signal to the modulation unit 108.

[0134] The modulation unit 108 modulates the control signal input from the encoding unit 107 and outputs the modulated control signal to the signal distribution unit 112.

[0135] The downlink control signal generation unit 109 uses the control information (downlink resource allocation information, PUCCH resource allocation information, or PUCCH mode information, etc.) input from the control unit 101 to generate a downlink control information bit string, and outputs the generated control information bit string to the encoding unit 110. Furthermore, control information is sometimes sent to multiple terminals, so the downlink control signal generation unit 109 can also include the terminal ID of each terminal in the control information for each terminal and generate a bit string therein.

[0136] The encoding unit 110 performs error correction encoding on the control information bit string input from the downlink control signal generation unit 109 and outputs the encoded control signal to the modulation unit 111.

[0137] The modulation unit 111 modulates the control signal input from the encoding unit 110 and outputs the modulated control signal to the signal distribution unit 112.

[0138] Signal allocation unit 112 maps the data signal input from modulation unit 105 to the radio resources shown in the downlink resource allocation information input from control unit 101. Furthermore, signal allocation unit 112 maps the control signal input from modulation unit 108 or modulation unit 111 to the radio resources. Signal allocation unit 112 then outputs the mapped downlink signal to IFFT unit 113.

[0139] The IFFT unit 113 applies OFDM or similar transmission waveform generation processing to the signal input from the signal distribution unit 112. In the case of OFDM transmission with an added CP (Cyclic Prefix), the IFFT unit 113 adds the CP (not shown). The IFFT unit 113 outputs the generated transmission waveform to the transmission unit 114.

[0140] The transmitting unit 114 performs RF (Radio Frequency) processing, such as D / A (Digital-to-Analog) conversion and up-conversion, on the signal input from the IFFT unit 113, and transmits the wireless signal to the terminal 200 through the antenna 115.

[0141] The receiving unit 116 performs RF processing such as down-conversion or A / D (Analog-to-Digital) conversion on the uplink signal waveform received from the terminal 200 through the antenna 115, and outputs the received and processed uplink signal waveform to the FFT unit 117.

[0142] FFT unit 117 applies FFT processing to the uplink signal waveform input from receiving unit 116, converting the time-domain signal into a frequency-domain signal. FFT unit 117 then outputs the frequency-domain signal obtained through FFT processing to extraction unit 118.

[0143] Based on the information received from the control unit 101 (PUCCH resource allocation information, etc.), the extraction unit 118 extracts the radio resource portion of the PUCCH relative to SR or HARQ-ACK from the signal input to the FFT unit 117, and outputs the extracted radio resource components to the SR detection unit 119 and the PUCCH demodulation and decoding unit 120, respectively.

[0144] The SR detection unit 119 performs power detection on the signal input from the extraction unit 118 to detect whether there is an SR. In addition, if the SR detection unit 119 detects the presence of an SR and the HARQ-ACK is sent by the SR resource, the SR detection unit 119 outputs the signal input from the extraction unit 118 to the PUCCH demodulation and decoding unit 120.

[0145] The PUCCH demodulation and decoding unit 120 performs equalization, demodulation, decoding, or power detection on the PUCCH signal input from the extraction unit 118 or the SR detection unit 119, and outputs the decoded bit sequence or the power-detected signal to the determination unit 121.

[0146] The determination unit 121 determines, based on the bit sequence or power-detected signal input from the PUCCH demodulation and decoding unit 120, whether the HARQ-ACK signal sent from the terminal 200 represents ACK or NACK relative to the sent data signal. The determination unit 121 outputs the determination result to the retransmission control unit 104.

[0147] [Terminal Structure]

[0148] Figure 10 This is a block diagram illustrating the structure of the terminal 200 according to Embodiment 1 of the present invention. Figure 10 In the terminal 200, there are: antenna 201, receiving unit 202, FFT unit 203, extraction unit 204, downlink control signal demodulation unit 205, high-order control signal demodulation unit 206, downlink data signal demodulation unit 207, error detection unit 208, control unit 209, SR generation unit 210, modulation unit 211, HARQ-ACK generation unit 212, encoding unit 213, modulation unit 214, signal distribution unit 215, IFFT unit 216, and transmission unit 217.

[0149] The receiving unit 202 performs RF processing such as down-conversion or A / D (Analog-to-Digital) conversion on the signal waveform of the downlink signal (data signal and control signal) received from the base station 100 through the antenna 201, and outputs the obtained received signal (baseband signal) to the FFT unit 203.

[0150] FFT unit 203 applies FFT processing to the signal (time-domain signal) input from receiving unit 202, converting the time-domain signal into a frequency-domain signal. FFT unit 203 then outputs the frequency-domain signal obtained through FFT processing to extraction unit 204.

[0151] Based on the control information input from the control unit 209, the extraction unit 204 extracts the downlink control signal from the signal input from the FFT unit 203 and outputs it to the downlink control signal demodulation unit 205. Furthermore, based on the control information input from the control unit 209, the extraction unit 204 extracts the high-level control signal and the downlink data signal, outputting the high-level control signal to the high-level control signal demodulation unit 206 and the downlink data signal to the downlink data signal demodulation unit 207.

[0152] The downlink control signal demodulation unit 205 performs blind decoding on the downlink control signal input from the extraction unit 204. If it determines that the signal is a control signal destined for the local unit, it demodulates the signal and outputs it to the control unit 209.

[0153] The high-level control signal demodulation unit 206 demodulates the high-level control signal input from the extraction unit 204 and outputs the demodulated high-level control signal to the control unit 209.

[0154] The downlink data signal demodulation unit 207 demodulates and decodes the downlink data signal input from the extraction unit 204, and outputs the decoded downlink data to the error detection unit 208.

[0155] Error detection unit 208 performs error detection on the downlink data input from downlink data signal demodulation unit 207 and outputs the error detection result to HARQ-ACK generation unit 212. Furthermore, error detection unit 208 outputs downlink data that is determined to be error-free as received data.

[0156] The control unit 209 calculates the radio resource allocation for the downlink data signal based on the downlink resource allocation information shown by the control signal input from the downlink control signal demodulation unit 205, and outputs the information representing the calculated radio resource allocation to the extraction unit 204.

[0157] Furthermore, the control unit 209 uses the high-level control signal input from the high-level control signal demodulation unit 206 and the control signal input from the downlink control signal demodulation unit 205 to calculate the PUCCH resources (SR resources) for transmitting SR and the CCH resources (HARQ-ACK resources) for transmitting HARQ-ACKPU, based on PUCCH resource allocation information regarding the resource allocation of PUCCH for SR and HARQ-ACK. Then, the control unit 209 outputs the information regarding the calculated PUCCH resources to the signal allocation unit 215.

[0158] Furthermore, the control unit 209 determines the mode, time, frequency resources, and sequence of the SR and the PUCCH that the terminal 200 actually sends HARQ-ACK to according to the method described later, and outputs the determined information to the signal distribution unit 215 and the transmission unit 217.

[0159] When the terminal 200 requests the base station 100 to allocate radio resources for uplink transmission, the SR generation unit 210 generates an SR and outputs the generated SR signal to the modulation unit 211.

[0160] The modulation unit 211 modulates the SR signal input from the SR generation unit 210 and outputs the modulated SR signal to the signal distribution unit 215. Alternatively, the modulation unit 211 may not perform modulation processing when only a 1-sequence is transmitted.

[0161] HARQ-ACK generation unit 212 generates a HARQ-ACK signal (ACK or NACK) for the received downlink data based on the error detection result input from error detection unit 208. HARQ-ACK generation unit 212 outputs the generated HARQ-ACK signal (bit sequence) to encoding unit 213.

[0162] The encoding unit 213 performs error correction encoding on the bit sequence input from the HARQ-ACK generation unit 212 and outputs the encoded bit sequence (HARQ-ACK signal) to the modulation unit 214.

[0163] The modulation unit 214 modulates the HARQ-ACK signal input from the encoding unit 213 and outputs the modulated HARQ-ACK signal to the signal distribution unit 215. Alternatively, the modulation unit 214 may not perform modulation processing when only a sequence of 1s is transmitted.

[0164] Signal allocation unit 215 maps the SR signal input from modulation unit 211 or the HARQ-ACK signal input from modulation unit 214 to the radio resources indicated by control unit 209. Signal allocation unit 215 outputs the mapped uplink signal (e.g., uplink control information (UCI)) to IFFT unit 216.

[0165] The IFFT unit 216 applies OFDM or similar transmission waveform generation processing to the signal input from the signal distribution unit 215. In the case of OFDM transmission with an added CP (Cyclic Prefix), the IFFT unit 216 adds the CP (not shown). Alternatively, if the IFFT unit 216 generates a single-carrier waveform, a DFT (Discrete Fourier Transform) unit (not shown) can be added before the signal distribution unit 215. The IFFT unit 216 outputs the generated transmission waveform to the transmission unit 217.

[0166] The transmitting unit 217 performs RF (Radio Frequency) processing on the signal input from the IFFT unit 216, based on the information input from the control unit 209, including transmission power control, D / A (Digital-to-Analog) conversion, up-conversion, etc., and transmits the wireless signal to the base station 100 through the antenna 201.

[0167] [Operations of base station 100 and terminal 200]

[0168] The operation of the base station 100 and terminal 200 with the above structure is explained in detail.

[0169] Figure 11 This describes the processing flow of the terminal 200 in this embodiment.

[0170] In this embodiment, the terminal 200 specifies the PUCCH resource (ST101) for transmitting uplink control information (UCI) based on one of the multiple modes (selections) of the channel structure for transmitting 1-symbol PUCCH of 1-symbol UCI with respect to transmitting 1-bit or 2-bit UCI, according to the operating environment of the terminal 200.

[0171] The following describes the scenario where the terminal 200 can be configured with two modes, as multiple modes (selections) of the channel structure related to the 1-symbol PUCCH. For example, as Figure 12As shown, as an example of two modes, terminal 200 can also be configured to select 1-1 and 4-2. As mentioned above, selection 4-2 is a mode with a lower PAPR than selection 1-1. On the other hand, selection 1-1 is a mode with higher PUCCH resource utilization efficiency than selection 4-2.

[0172] In this scenario, for example, base station 100 selects one mode from multiple modes (selection 1-1 and selection 4-2) of the channel structure related to the 1-symbol PUCCH, based on the operating environment of terminal 200. For instance, if terminal 200 is assumed to be in an interference power-limited environment (e.g., near the cell center), selection 1-1, which offers the best resource utilization efficiency (i.e., suitable for interference power-limited environments), is selected. On the other hand, if terminal 200 is assumed to be in a noise power-limited environment (e.g., near the cell edge), selection 4-2, which best reduces PAPR (i.e., suitable for noise power-limited environments), is selected.

[0173] Furthermore, whether terminal 200 is in an interference power-limited environment or a noise power-limited environment can be determined by the base station based on parameters (reception quality, reception power, etc.) reported by terminal 200. Additionally, the mode used by terminal 200 can be selected by base station 100 as described above, or it can be selected by terminal 200 itself.

[0174] Based on the channel structure mode set in the terminal, terminal 200 allocates a UCI (Uniform Interference Code) containing at least one HARQ-ACK and SR for downlink data to the PUCCH resource (ST102) allocated to terminal 200. That is, in an interference-limited environment, terminal 200 allocates a UCI (containing at least one HARQ-ACK and SR) to the PUCCH resource based on selection 1-1 (e.g., referring to...). Figure 3 On the other hand, when the operating environment of the machine is a noise power-limited environment, the terminal 200 allocates UCI to PUCCH resources based on selection 4-2 (for example, refer to...). Figure 6 ).

[0175] Then, terminal 200 sends UCI (ST103) using 1-symbol PUCCH.

[0176] In this way, terminal 200 can configure a PUCCH channel structure suitable for its operating environment based on the operating environment setting mode of terminal 200 within the cell. Therefore, it can improve the transmission power efficiency of terminal 200 or the resource utilization efficiency of the network.

[0177] [Terminal mode determination method]

[0178] As an example of how the terminal 200 determines which of the two modes to use, methods 1 to 4 are explained below.

[0179] <Method 1>

[0180] The mode can also be notified to the terminal 200 via signaling from the base station 100 (e.g., group-specific higher-layer notification, group-specific dynamic signaling (group shared PDCCH), terminal-specific higher-layer notification, or terminal-specific dynamic signaling (DCI: Downlink Control Information)). Based on the mode information notified from the base station 100, the terminal 200 specifies which of the two modes to operate in.

[0181] <Method 2>

[0182] Alternatively, terminal 200 may determine which of the two modes to use without relying on explicit signaling from base station 200. For example, in the case where two modes, selection 1-1 and selection 4-2, can be set, terminal 200 determines the mode based on whether or not an RS to be transmitted is available. This is because, for example, as... Figure 1 and Figure 2 As shown, in 1-symbol PUCCH transmission, there is a transmission with RS in selection 1-1 (selection 1), but no transmission without RS in selection 4-2 (selection 4). That is, terminal 200 performs an action based on selection 1-1 when RS is present, and performs an action based on selection 4-2 when RS is absent.

[0183] <Method 3>

[0184] Furthermore, when multiple Random Access Channel (RACH) resources are configured, terminal 200 can determine which of the two modes to use based on the RACH resources. Base station 100 notifies terminal 200 of the multiple RACH resources through cell-specific or group-specific higher-layer notifications.

[0185] Here, each RACH resource is associated with the RSRP (Reference Signal Received Power) / RSRQ (Reference Signal Received Quality) measured by the terminal 200. Furthermore, two configurable modes of the terminal 200 are associated with the RACH resources. That is, the two configurable modes of the terminal 200 are also associated with the RSRP / RSRQ of the associated RACH resources.

[0186] Therefore, terminal 200 measures its own RSRP / RSRQ, selects the RACH resource corresponding to the measured RSRP / RSRQ, and determines the mode of the 1-symbol PUCCH channel structure with 1 bit or 2 bit UCI used by the transmitting terminal 200 based on the selected RACH resource.

[0187] <Method 4>

[0188] In NR, operation based on multiple subcarrier intervals (e.g., 15kHz, 30kHz, 60kHz, etc.) is supported. For example, in the case where two modes, select 1-1 and select 4-2, can be set, the terminal 200 can also determine the mode based on the subcarrier interval when transmitting the PUCCH.

[0189] For example, when two modes, Selection 1-1 and Selection 4-2, can be set, the terminal 200 can also set Selection 1-1 in a 15kHz subcarrier spacing and Selection 4-2 in a 30kHz or 60kHz subcarrier spacing. This is because as the subcarrier spacing increases, the symbol length decreases, and the coverage area reduces. Therefore, when the subcarrier spacing is larger, a mode with a smaller PAPR (Proportional Aspect Ratio) can be set to ensure better coverage (here, Selection 4-2).

[0190] Methods 2 to 4 described above, which determine the mode without relying on explicit signaling, have the advantage of reducing signaling overhead.

[0191] Thus, in this embodiment, the terminal 200 selects from multiple modes ( Figure 12 Among the two modes, the appropriate mode is set according to the working environment (assumed environment (scheme)) of the terminal 200, and 1-symbol PUCCH is sent based on the set mode.

[0192] Therefore, depending on the conditions of the terminal 200 (e.g., a noise power-limited environment or an interference power-limited environment), the reduction of PAPR or the improvement of resource utilization efficiency can be prioritized. Thus, the transmission of HARQ-ACK, SR, or simultaneous transmission of SR and HARQ-ACK in the 1-symbol PUCCH can be appropriately performed. In other words, according to this embodiment, in the 1-symbol PUCCH, SR can be appropriately transmitted in addition to HARQ-ACK.

[0193] [Number of patterns]

[0194] Furthermore, the number of configurable modes for the 1-symbol PUCCH channel structure, which transmits 1 or 2 bits of UCI, is not limited to... Figure 12The two modes shown can be configured, but more than three modes can also be set. The increased number of configurable modes allows for more detailed PUCCH channel structure settings to suit the operating environment of the terminal 200.

[0195] [Match of patterns]

[0196] Furthermore, the PUCCH channel structure mode that can be set in terminal 200 is not currently fixed. Figure 12 The combination of options 1-1 and 4-2 shown can also be any combination of options 1-1, 1-2, 4-1, and 4-2. In other words, it can be a combination of different modes with PAPR or resource utilization efficiency set.

[0197] For example, options 1-1 and 4-1, 1-2 and 4-1, 1-2 and 4-2, etc., can also be used in combination with any of options 1 (1-1, 1-2) or any of options 4 (4-1, 4-2). Specifically, it can be said that the combination of options 1-1 and 4-1, and the combination of options 1-2 and 4-1, are combinations that place greater emphasis on resource utilization efficiency. On the other hand, it can be said that the combination of options 1-2 and 4-1 is a combination that places greater emphasis on reducing PAPR.

[0198] Alternatively, you can choose a combination of 1-1 and 1-2, or a combination of 4-1 and 4-2. It can be said that the combination of 1-1 and 1-2 focuses more on resource utilization efficiency, while the combination of 4-1 and 4-2 focuses more on reducing PAPR.

[0199] [Select a variation of 1-1]

[0200] Furthermore, in option 1-1, the RS sequence used for HARQ-ACK and the RS sequence used for SR can also be the same sequence. In this case, when SR and HARQ are transmitted simultaneously, the terminal 200 simultaneously transmits a total of three sequences: the HARQ-ACK sequence, the SR sequence, and the shared RS sequence. That is, in this case, HARQ resources and SR resources are allocated to the same PRB. Thus, the RS used in the 1-symbol PUCCH transmission is shared, which simplifies the received signal processing in the base station 100.

[0201] (Implementation Method 2)

[0202] The base station and terminal in this embodiment share the same basic structure as the base station 100 and terminal 200 in Embodiment 1, therefore the reference is... Figure 9 and Figure 10 illustrate.

[0203] In this embodiment, when both HARQ-ACK and SR are transmitted simultaneously, similar to Embodiment 1, the terminal 200 allocates at least one UCI containing HARQ-ACK and SR to the PUCCH resource and transmits it based on a mode selected according to the operating environment of the terminal 200 among multiple modes (selections) of the channel structure related to the 1-symbol PUCCH.

[0204] On the other hand, in the event of either the transmission of HARQ-ACK or the transmission of SR, terminal 200 allocates UCI to PUCCH resources and transmits it based on a common mode in any working environment of terminal 200.

[0205] The following, such as Figure 13 As shown, the mode (selection) set when both HARQ-ACK and SR transmissions occur simultaneously is the same as in Implementation 1. Figure 12 Similarly, the two modes of setting selection 1-1 and selection 4-2 are explained, and the common mode mentioned above is set to selection 4 (for example, selecting either 4-1 or 4-2).

[0206] In other words, such as Figure 13 As shown, when SR and HARQ-ACK are transmitted simultaneously, under the assumption that terminal 200 is in an interference power-limited environment, terminal 200 performs 1-symbol PUCCH transmission based on the most resource-efficient option 1-1. Under the assumption that terminal 200 is in a noise power-limited environment, it performs 1-symbol PUCCH transmission based on the option 4-2 that best reduces PAPR.

[0207] In this way, when simultaneously transmitting SR and HARQ-ACK, as in Implementation Method 1, the terminal 200 can configure a PUCCH channel structure suitable for its operating environment based on the terminal 200's operating environment setting mode within the cell. Therefore, the transmission power efficiency of the terminal 200 or the resource utilization efficiency of the network can be improved.

[0208] On the other hand, such as Figure 13 As shown, in the event of either HARQ-ACK transmission or SR transmission, terminal 200 will select setting 4 as the common mode and perform 1-symbol PUCCH transmission.

[0209] Here, scheduling in base station 100 can, to some extent, prevent the simultaneous transmission of HARQ-ACK and SR in terminal 200. In other words, the frequency of simultaneous transmission of HARQ-ACK and SR in terminal 200 can be suppressed to a low level. Conversely, the frequency of either HARQ-ACK transmission or SR transmission in terminal 200 is increased. Therefore, by setting the mode of either HARQ-ACK transmission or SR transmission to be common regardless of the operating environment of terminal 200, terminal 200 can use the common mode PUCCH channel structure as much as possible, thus simplifying the processing of terminal 200.

[0210] [Terminal mode determination method]

[0211] When both SR and HARQ-ACK are sent simultaneously, the following methods 1 to 3 are described as an example of how to determine which of the two modes the terminal 200 uses.

[0212] <Method 1>

[0213] The terminal 200 may also be notified of the mode based on signaling from base station 100 (e.g., group-specific higher-layer notification, group-specific dynamic signaling (group shared PDCCH), terminal-specific higher-layer notification, or terminal-specific dynamic signaling (DCI)). Based on the mode information notified by base station 100, terminal 200 specifies which of the two modes to operate in.

[0214] <Method 2>

[0215] Alternatively, terminal 200 may determine which of the two modes to use without relying on explicit signaling from base station 200. For example, in the case where two modes, selection 1-1 and selection 4-2, can be set, terminal 200 determines the mode based on whether an RS should be transmitted. This is because, for example, as... Figure 1 and Figure 2 As shown, in 1-symbol PUCCH transmission, there is a transmission with RS in selection 1-1 (selection 1), but no transmission without RS in selection 4-2 (selection 4). That is, terminal 200 performs an action based on selection 1-1 when RS is present, and performs an action based on selection 4-2 when RS is absent.

[0216] <Method 3>

[0217] Furthermore, when multiple RACH resources are configured, terminal 200 can also determine which of the two modes to use based on the RACH resources. Base station 100 notifies terminal 200 of the multiple RACH resources through cell-specific or group-specific higher-layer notifications.

[0218] Here, each RACH resource is associated with the RSRP / RSRQ measured by terminal 200. Furthermore, two configurable modes of terminal 200 are associated with RACH resources. That is, the two configurable modes of terminal 200 are also associated with the RSRP / RSRQ associated with the RACH resources.

[0219] Therefore, terminal 200 measures its own RSRP / RSRQ, selects the RACH resource corresponding to the measured RSRP / RSRQ, and determines the mode of the 1-symbol PUCCH channel structure used by terminal 200 to transmit 1 bit or 2 bits of UCI based on the selected RACH resource.

[0220] <Method 4>

[0221] In NR, operation based on multiple subcarrier intervals (e.g., 15kHz, 30kHz, 60kHz, etc.) is supported. For example, in the case where two modes, select 1-1 and select 4-2, can be set, the terminal 200 can also determine the mode based on the subcarrier interval when transmitting the PUCCH.

[0222] Methods 2 to 4 described above, which determine the mode without relying on explicit signaling, have the advantage of reducing signaling overhead.

[0223] Thus, in this embodiment, when simultaneously sending HARQ-ACK and SR, similar to embodiment 1, terminal 200 operates in multiple modes ( Figure 13 In the two modes, an appropriate mode is set according to the working environment (assumed environment (scheme)) of the terminal 200, and 1-symbol PUCCH is transmitted based on the set mode. Thus, similar to implementation method 1, the reduction of PAPR or the improvement of resource utilization efficiency can be prioritized according to the condition of the terminal 200, so SR and HARQ-ACK can be transmitted simultaneously in the 1-symbol PUCCH appropriately.

[0224] Furthermore, in this embodiment, in the event of either HARQ-ACK transmission or SR transmission, the terminal 200 sets a common mode in any operating environment of the terminal 200. Therefore, the channel structure of the 1-symbol PUCCH in the terminal 200 can be made as common as possible, thus simplifying the 1-symbol PUCCH transmission process.

[0225] [Number of patterns]

[0226] Furthermore, when simultaneously transmitting SR and HARQ-ACK, the number of configurable modes for the 1-symbol PUCCH channel structure, which transmits 1 or 2 bits of UCI, is not limited to [specific modes]. Figure 13 The two shown can also be set to three or more modes. By increasing the number of configurable modes, a more detailed PUCCH channel structure can be set to suit the working environment of the terminal 200.

[0227] [Match of patterns]

[0228] Furthermore, when simultaneously transmitting SR and HARQ-ACK, the PUCCH channel structure mode that can be set in terminal 200 is not limited to... Figure 13 The combination of options 1-1 and 4-2 shown can also be any combination of options 1-1, 1-2, 4-1, and 4-2. In other words, it can be any combination of different PAPR or resource utilization efficiency modes.

[0229] For example, just as with choices 1-1 and 4-1, 1-2 and 4-1, and 1-2 and 4-2, one can also use any combination of choice 1 (choose 1-1, 1-2) and any combination of choice 4 (choose 4-1, 4-2). Specifically, it can be said that the combination of choice 1-1 and 4-1, and the combination of choice 1-2 and 4-1, are combinations that prioritize resource utilization efficiency. On the other hand, it can be said that the combination of choice 1-2 and 4-1 is a combination that prioritizes reducing PAPR.

[0230] Alternatively, it could be a combination of option 1-1 and option 1-2, or a combination of option 4-1 and option 4-2. It can be said that the combination of option 1-1 and option 1-2 focuses more on resource utilization efficiency, while the combination of option 4-1 and option 4-2 focuses more on reducing PAPR.

[0231] [Common Pattern]

[0232] Furthermore, the common mode set up when only HARQ-ACK or SR is sent is not currently defined. Figure 13 Option 4 shown can be, for example, option 1 or the method described in implementation 3 (proposal 3). When option 1 is set as the common mode, it can be said that a method that focuses more on resource utilization efficiency is used. On the other hand, when option 4 is set as the common mode, it can be said that a method that focuses more on reducing PAPR is used.

[0233] (Implementation Method 3)

[0234] The base station and terminal in this embodiment share the same basic structure as the base station 100 and terminal 200 in Embodiment 1, therefore the reference is... Figure 9 and Figure 10 illustrate.

[0235] In this embodiment, terminal 200 supports one mode as a channel structure for transmitting 1-symbol PUCCH of 1 bit or 2 bits of UCI. This 1-symbol PUCCH channel structure in one mode is assumed to be a trade-off between resource utilization efficiency and PAPR. Compared with selections 1-1, 1-2, 4-1, and 4-2, it can balance the improvement of resource utilization efficiency and the reduction of PAPR.

[0236] Specifically, in this embodiment, for 1 UE (terminal 200), three sequences are ensured: the sequence for RS (RS sequence), the sequence for modulating and transmitting HARQ-ACK (HARQ-ACK sequence), and the sequence for transmitting SR (SR sequence). That is, for terminal 200, RS resources, HARQ-ACK resources, and SR resources are allocated.

[0237] In the case of transmission without SR but with HARQ-ACK, terminal 200 transmits HARQ-ACK using both the RS sequence (RS resource) and the HARQ-ACK sequence (HARQ-ACK resource). At this time, the HARQ-ACK sequence is modulated using BPSK or QPSK via UCI. That is, terminal 200 simultaneously transmits both the UCI sequence and the RS sequence.

[0238] Furthermore, when there is SR transmission but no HARQ-ACK transmission, terminal 200 uses both RS sequence (RS resource) and SR sequence (SR resource) to transmit SR. That is, terminal 200 transmits both the SR sequence and the RS sequence simultaneously.

[0239] Furthermore, when both SR and HARQ-ACK transmissions occur simultaneously, terminal 200 transmits HARQ-ACK using both the RS sequence (RS resource) and the SR sequence (SR resource). In this case, the SR sequence is modulated using BPSK or QPSK through HARQ-ACK. That is, terminal 200 transmits both the SR and RS sequences simultaneously.

[0240] In other words, the terminal 200 uses one of the HARQ-ACK resources and SR resources and RS resources to send UCI (HARQ-ACK or SR) and RS based on the transmission status of SR and HARQ-ACK.

[0241] Figure 14This represents an example of a PUCCH resource where the PUCCH resource size is set to 1 PRB, a CAZAC code sequence is used, and orthogonal multiplexing between sequences is performed using cyclic shifting.

[0242] exist Figure 14 In the process, for terminal 200 (UE), PUCCH resource #0 (PRB#0, cyclic shift #0) is allocated as RS resource, PUCCH resource #4 (PRB#0, cyclic shift #4) is allocated as SR resource, and PUCCH resource #8 (PRB#0, cyclic shift #8) is allocated as HARQ-ACK resource.

[0243] In other words, Figure 14 In the case of no SR transmission but HARQ-ACK transmission, terminal 200 uses PUCCH resource #0 (RS resource) and PUCCH resource #8 (HARQ-ACK resource) to send HARQ-ACK (ACK or NACK) and RS. In the case of SR transmission but no HARQ-ACK transmission, PUCCH resource #0 (RS resource) and PUCCH resource #4 (SR resource) are used to send SR and RS. When SR and HARQ-ACK are transmitted simultaneously, PUCCH resource #0 (RS resource) and PUCCH resource #4 (SR resource) are used to send HARQ-ACK (ACK or NACK) and RS.

[0244] Thus, in this embodiment, in any of the transmissions of HARQ-ACK, SR, and simultaneous transmissions of HARQ-ACK and SR, the HARQ-ACK sequence or SR sequence and the simultaneously transmitted RS sequence are common. That is, in LTE, where different RS sequences are used when only HARQ-ACK is transmitted and when HARQ-ACK and SR are transmitted simultaneously, this embodiment uses a common RS sequence in the cases of transmission without SR, transmission with HARQ-ACK, and simultaneous transmissions of SR and HARQ-ACK. Therefore, as... Figure 14 As shown, SR resources and HARQ-ACK resources are allocated to the same PRB.

[0245] If we compare the number of transmission sequences and the number of sequences allocated to each UE in the channel structures described in Implementation 3 (referred to as Proposal 3), Selection 1-1, Selection 1-2, Selection 4-1, and Selection 4-2 respectively, then we can see that... Figure 15 That's how it's summarized.

[0246] In Proposal 3, HARQ-ACK resources, SR resources, and RS resources are guaranteed for each UE. Therefore, in Proposal 3, the number of sequences allocated to each UE is 3 (refer to...). Figure 15).

[0247] Furthermore, in Proposal 3, in the case of transmission without SR but with HARQ-ACK, terminal 200 uses HARQ-ACK resources and RS resources to transmit HARQ-ACK and RS, thus simultaneously transmitting two sequences: the UCI sequence and the RS sequence (see reference). Figure 15 Furthermore, in the case of SR transmission without HARQ-ACK transmission, terminal 200 uses SR and RS resources to transmit SR and RS, thus simultaneously transmitting two sequences: the SR sequence and the RS sequence (see reference). Figure 15 Furthermore, in the case where SR and HARQ-ACK are transmitted simultaneously, terminal 200 uses both SR and RS resources to transmit HARQ-ACK, thus simultaneously transmitting two sequences: the SR sequence and the RS sequence (see reference). Figure 15 ).

[0248] Therefore, as Figure 15 As shown, in the channel structure of this embodiment (Proposal 3), compared with selection 1-1 (4 sequences), it can be said that the number of sequences transmitted simultaneously is reduced (2 sequences), thus reducing PAPR. On the other hand, as Figure 15 As shown, in the channel structure of this embodiment (Proposal 3), compared with Selection 4-1 (1 or 2 sequences) or Selection 4-2 (1 sequence), it can be said that the number of sequences transmitted simultaneously (2 sequences) increases, and resource utilization efficiency is improved. Furthermore, as... Figure 15 As shown, in options 1-2, compared to the need to ensure 4 sequences for each UE, in the channel structure of this embodiment (Proposal 3), the RS sequences in SR and HARQ-ACK are common, so it can be said that only 3 sequences need to be ensured, thus improving resource utilization efficiency.

[0249] Thus, according to this embodiment, the PUCCH channel structure can be common regardless of the operating environment (scheme) of the terminal 200 or the transmission status of HARQ-ACK and SR. Therefore, complex PUCCH design (resource allocation or signaling methods) can be avoided.

[0250] Furthermore, in this embodiment, the RS used in 1-symbol PUCCH transmission is common regardless of whether HARQ-ACK is transmitted, SR is transmitted, or either SR or HARQ-ACK is transmitted simultaneously. Therefore, it also has the advantage of simplifying the received signal processing in base station 100. Moreover, by suppressing the number of sequences transmitted simultaneously to 2 in either HARQ-ACK or SR transmission, compared to selecting 1-1, the increase in PAPR can be suppressed, and higher resource utilization efficiency can be achieved.

[0251] [Modification of Implementation Method 3]

[0252] In Implementation 3, a mode (Proposal 3) is supported as the channel structure of 1-symbol PUCCH. Furthermore, in Implementation 3, it is explained that in one mode, the channel structure of 1-symbol PUCCH considers the trade-off between resource utilization efficiency and PAPR, even when both sequences are transmitted in any transmission situation of HARQ-ACK and SR, so that both resource utilization efficiency and PAPR can be improved to some extent.

[0253] On the other hand, in the above mode, even in any transmission condition of HARQ-ACK and SR, two sequences are transmitted, so PAPR increases compared to the case of transmitting one sequence. Therefore, there is a risk of coverage degradation in environments with very strict transmission power limitations.

[0254] Therefore, in a variation of Embodiment 3, in an environment where the transmission power is strictly limited, the terminal 200 transmits only a sequence of 1s during the transmission of the 1-symbol PUCCH, suppressing the increase of PAPR. That is, in a variation of Embodiment 3, as... Figure 16 As shown, in addition to the above-mentioned mode (Proposal 3), a mode (Appendix mode) can be set to send only the 1-sequence selection 4-2 used in environments where the transmission power is very limited.

[0255] However, in option 4-2, especially when transmitting 2 bits of UCI, the degradation in resource utilization efficiency becomes very significant (e.g., refer to...). Figure 15 Therefore, the 4-2 mode can be used only when sending 1 bit of UCI.

[0256] Furthermore, for the terminal 200 to determine which mode to use among the two modes (Proposal 3 and Option 4-2), for example, the following methods 1 to 3 can also be used.

[0257] <Method 1>

[0258] The mode can also be notified to the terminal 200 via signaling from the base station 100 (e.g., group-specific higher-layer notification, group-specific dynamic signaling (group shared PDCCH), terminal-specific higher-layer notification, or terminal-specific dynamic signaling (DCI), etc.). Based on the mode information notified from the base station 100, the terminal 200 specifies which mode to operate in among the two modes.

[0259] <Method 2>

[0260] Alternatively, terminal 200 may determine which of the two modes to use without relying on explicit signaling from base station 200. For example, in the case where two modes, proposal 3 and selection 4-2, can be set, terminal 200 determines the mode based on whether an RS should be transmitted. This is because, for example, as Figure 14 As shown, in the 1-symbol PUCCH transmission, there is a transmission with RS in proposal 3, but no transmission with RS in selection 4-2. That is, terminal 200 performs an action based on proposal 3 when RS is present, and performs an action based on selection 4-2 when RS is absent.

[0261] <Method 3>

[0262] Furthermore, when multiple RACH resources are configured, terminal 200 can determine which of the two modes to use based on the RACH resources. Base station 100 notifies terminal 200 of the multiple RACH resources through cell-specific or group-specific higher-layer notifications.

[0263] Here, each RACH resource is associated with the RSRP / RSRQ measured by terminal 200. Furthermore, two configurable modes of terminal 200 are associated with RACH resources. That is, the two configurable modes of terminal 200 are also associated with the RSRP / RSRQ associated with the RACH resources.

[0264] Therefore, terminal 200 measures its own RSRP / RSRQ, selects the RACH resource corresponding to the measured RSRP / RSRQ, and determines the mode related to the 1-symbol PUCCH channel structure used by terminal 200 to transmit 1 bit or 2 bits of UCI based on the selected RACH resource.

[0265] <Method 4>

[0266] In NR, operation with multiple subcarrier intervals (e.g., 15kHz, 30kHz, 60kHz, etc.) is supported. For example, in the case where two modes, select 1-1 and select 4-2, can be set, the terminal 200 can also determine the mode based on the subcarrier interval when transmitting the PUCCH.

[0267] Methods 2 to 4 described above, which determine the mode without relying on explicit signaling, have the advantage of reducing signaling overhead.

[0268] (Implementation Method 4)

[0269] The base station and terminal in this embodiment share the same basic structure as the base station 100 and terminal 200 in Embodiment 1, therefore the reference is... Figure 9 and Figure 10 illustrate.

[0270] In embodiments 1 to 3, when the terminal 200 transmits multiple sequences simultaneously, the PAPR value may increase or decrease due to the combination of the simultaneously transmitted sequences. For example, when multiple sequences are generated by cyclic shifting the same CAZAC sequence, the PAPR value tends to increase in combinations of consecutively cyclically shifted sequences and tends to decrease in combinations of discontinuously cyclically shifted sequences.

[0271] Therefore, in this embodiment, the sequence used in the transmission of the 1-symbol PUCCH is divided into multiple groups. That is, multiple sequences used in the PUCCH resource are divided into multiple groups based on the PAPR of the sequence combination within the same group. Then, sequences within the same group are assigned to the same UE.

[0272] For example, multiple groups can also be divided into sequence groups containing sequences with a smaller PAPR when transmitted simultaneously (i.e., groups suitable for interference power-limited environments) and sequence groups containing sequences with a larger PAPR (i.e., groups that can be used even in noise power-limited environments), etc.

[0273] For example, in terminal 200, multiple sequence groups are assigned (e.g., Figure 17 The sequence group shown in group 0 and group 1 is suitable for the working environment of terminal 200. Then, terminal 200 simultaneously sends multiple sequences contained in the same sequence group.

[0274] Thus, in this embodiment, by setting multiple sequence groups based on the PAPR value when multiple sequences are transmitted simultaneously, it is possible to allocate sequences suitable for the working environment of the terminal 200 within the cell, thereby improving the transmission power efficiency of the terminal 200.

[0275] Furthermore, to achieve the goal of randomly generating inter-cell sequence interference, it can be applied to cause sequence jumps with different sequence numbers at specified time intervals. In this case, sequence jumps occur between sequences within the same sequence group. Thus, for example, even when performing sequence jumps in a sequence group containing sequences whose PAPR decreases due to simultaneous transmission, it can prevent the PAPR value from increasing in simultaneously transmitted sequences.

[0276] Furthermore, the specified time interval for sequence transitions can be, for example, a time unit such as a symbol, a time slot, a time slot, a subframe, or a frame.

[0277] (Implementation Method 5)

[0278] The base station and terminal in this embodiment share the same basic structure as the base station 100 and terminal 200 in Embodiment 1, therefore the reference is... Figure 9 and Figure 10 illustrate.

[0279] In Implementation 5, it is assumed that the sequences assigned to the same UE in Implementations 1 to 3 are within the same PRB or coherent bandwidth.

[0280] Furthermore, in Implementation 5, it is assumed that the transmission power difference between sequences is known. For example, the transmission power of each sequence can also be the same (i.e., the transmission power difference between sequences is 0).

[0281] If two sequences for the same UE are allocated outside the coherent bandwidth, the power detection performance will degrade due to the frequency selectivity of the channel during power detection at the base station. Furthermore, the power detection performance at the base station will also degrade when the difference in transmission power between sequences is not known.

[0282] In contrast, in this embodiment, sequences used in the PUCCH resource, sequences within the same PRB, or sequences within the coherent bandwidth are assigned to the same UE (terminal 200). Therefore, power detection can be performed with high accuracy, unaffected by the frequency selectivity of the channel during power detection performed in the base station 100. Furthermore, since the transmission power difference between sequences is known, power detection performed in the base station 100 can be performed with high accuracy.

[0283] Thus, in this embodiment, by setting the sequence allocation within the same PRB or coherent bandwidth, or the transmission power difference between sequences, to be known, the degradation of the power detection characteristics required in any of embodiments 1 to 3 can be prevented.

[0284] Furthermore, coherent bandwidth can also be referred to as proximity bandwidth (PRB) or adjacent bandwidth (PRB).

[0285] [Modification of Implementation Method 5]

[0286] In a variation of Implementation 5, the case where different PRB sequences are assigned in the same UE is described.

[0287] When different PRB sequences are assigned in the same UE, for SR resources and ACK / NACK resources respectively, for example, in the method of allocating PRBs for any one of the system bandwidth, although the flexibility of resource allocation can be maximized, the signaling overhead for allocating PRBs increases.

[0288] Therefore, in a variation of implementation 5, where sequences of different PRBs are assigned in the same UE (here, sequences of two sequences), it is assumed that the two sequences are adjacent PRBs or adjacent PRBs. The sequences of adjacent PRBs or adjacent PRBs can, for example, be sequences within the coherent bandwidth.

[0289] For example, by setting neighboring or adjacent PRBs allocated to the same UE, it is not necessary to independently allocate PRBs for either SR resource or ACK / NACK resource relative to the same UE. Furthermore, for any resource that is either an SR resource or an ACK / NACK resource, only the relative PRB position with other resources needs to be notified. For example, base station 100 can also use the offset from the PRB allocated for ACK / NACK resource to notify terminal 200 of the PRB allocated for SR resource. Conversely, base station 100 can also use the offset from the PRB allocated for SR resource to notify terminal 200 of the PRB allocated for ACK / NACK resource. Moreover, in order to treat sequences of different PRBs allocated to the same UE as neighboring or adjacent PRBs, the range of the offset value can be up to a few PRBs.

[0290] Thus, in a variation of Implementation 5, when different PRB sequences are assigned to the same UE among multiple sequences used in PUCCH resources, the position of at least one PRB corresponding to the sequence assigned to the same UE is represented by an offset value indicating its relative position to the positions of other PRBs. Therefore, compared to notifying one PRB from all PRBs in the system bandwidth, the signaling overhead can be reduced when notifying the offset value of a PRB.

[0291] For example, when the system bandwidth consists of 100 PRBs, the signaling overhead is ceil(log2(100)) = 7 bits when any PRB within the system bandwidth is allocated. In contrast, in a variation of implementation 5, when the offset is set to... Figure 18 In the case of the four modes shown (-2, -1, 0, 1), the signaling overhead can be 2 bits.

[0292] Furthermore, Figure 18 This example illustrates using the PRB of the SR resource as a reference to offset the notification of the PRB of the ACK / NACK resource. However, it is not limited to this; the base station 100 may also use the PRB of the ACK / NACK resource as a reference to offset the notification of the PRB of the SR resource. Furthermore, Figure 18 The offset values ​​shown (-2, -1, 0, 1) are examples, and the offset values ​​are not limited to these.

[0293] Furthermore, the offset value can be a value defined in the standard or a value set in the RRC signaling. Additionally, when sequences of the same PRB are assigned to the same UR, the offset value of the aforementioned PRB can also be set as the offset of the cyclic shift.

[0294] The above describes various embodiments of the present invention.

[0295] [Other Implementation Methods]

[0296] (1) In the above embodiments, the case of generating multiple sequences by cyclic shifting the same CAZAC sequence was described. However, the method for generating multiple sequences is not limited to the above method. For example, multiple sequences can also be generated from CAZAC sequences with different sequence numbers. In addition, multiple sequences can also be generated from the same sequence in different PRBs. Moreover, multiple sequences can also be generated from a Comb within the same PRB. Furthermore, multiple sequences can also be defined by combining these methods.

[0297] For example, when the PUCCH resource size is X[RE], in the method of generating multiple sequences based on the cyclic shift of a CAZAC sequence of sequence length X, X sequences with different cyclic shift values ​​can be generated. Furthermore, when generating multiple sequences from Combs within the same PRB, by cyclic shifting a CAZAC sequence of sequence length X / 2, a total of X sequences can be generated from X / 2 different cyclically shifted sequences and 2 Combs.

[0298] (2) In the above embodiment, SR and HARQ-ACK are described as uplink control information (UCI) sent by terminal 200. However, the uplink control information sent by terminal 200 is not limited to SR and HARQ-ACK, and may also be other uplink control information (e.g., CSI).

[0299] (3) This invention can be implemented by software, hardware, or software in conjunction with hardware. The functional blocks used in the above embodiments can be implemented partially or entirely as integrated circuits, i.e., LSIs, and the processes described in the above embodiments can be controlled partially or entirely by an LSI or a combination of LSIs. An LSI can be composed of individual chips or a single chip, containing some or all of the functional blocks. An LSI can also include data input and output. Due to different levels of integration, LSIs are sometimes referred to as ICs, system LSIs, Super LSIs, or Ultra LSIs. The integrated circuit approach is not limited to LSIs; it can also be implemented using dedicated circuits, general-purpose processors, or special-purpose processors. Furthermore, FPGAs (Field Programmable Gate Arrays) that can be programmable after LSI manufacturing can be used, or reconfigurable processors that can connect and configure the circuitry within a reconfigurable LSI can be used. This invention can also be implemented as digital or analog processing. Furthermore, with advancements in semiconductor technology and the emergence of other derivative technologies, if an integrated circuit technology emerges that can replace LSI, it can certainly be used for the integration of functional blocks. There are also possibilities for its application in biotechnology and other fields.

[0300] The terminal of the present invention includes: a circuit that generates uplink control information containing HARQ-ACK for downlink data based on sequence selection; and a transmitter that transmits the uplink control information using a 1-symbol uplink control channel, i.e., PUCCH, wherein the sequence of the uplink control information containing the HARQ-ACK is different from the sequence of the uplink control information containing the HARQ-ACK and a scheduling request.

[0301] In the terminal of this invention, the HARQ-ACK is 1 bit or 2 bits.

[0302] In the terminal of this invention, for a 1-bit HARQ-ACK, the maximum number of terminals that can be reused in the same physical resource block is 6.

[0303] In the terminal of this invention, the sequence is a sequence that includes cyclic shifts, or a sequence defined by cyclic shifts.

[0304] In the terminal of the present invention, the sequence of uplink control information containing ACK as HARQ-ACK is different from the sequence of uplink control information containing NACK as HARQ-ACK.

[0305] In the terminal of the present invention, the physical resource block that is sent with the uplink control information containing the HARQ-ACK and the scheduling request is the same as the physical resource block that is sent with the uplink control information containing the HARQ-ACK.

[0306] In the terminal of the present invention, for a 1-bit HARQ-ACK, the number of sequences allocated to a terminal is 4, and for a 2-bit HARQ-ACK, the number of sequences allocated to a terminal is 8.

[0307] In the terminal of the present invention, when sending HARQ-ACK and scheduling request, the uplink control information is generated using one of the following modes: using a mode for the sequence of uplink control information containing HARQ-ACK and scheduling request; and using a mode for the sequence of uplink control information containing HARQ-ACK and a mode for the sequence of uplink control information containing scheduling request.

[0308] The terminal of the present invention further includes: a receiver, which receives information related to the resources of the PUCCH, and the terminal generates and sends the uplink control information based on the information.

[0309] In the terminal of this invention, the information related to the resources of the PUCCH includes information related to the cyclic shifting of the sequence.

[0310] The base station of the present invention includes: a transmitting unit for transmitting downlink data to a terminal; and a receiver for receiving uplink control information containing HARQ-ACK for the downlink data transmitted from the terminal using a 1-symbol uplink control channel, i.e., PUCCH, wherein the uplink control information containing the HARQ-ACK is based on sequence selection, and the sequence of the uplink control information containing the HARQ-ACK is different from the sequence of the uplink control information containing the HARQ-ACK and a scheduling request.

[0311] In the base station of the present invention, the HARQ-ACK is 1 bit or 2 bits.

[0312] In the base station of the present invention, for a 1-bit HARQ-ACK, the maximum number of terminals that can be reused in the same physical resource block is 6.

[0313] In the base station of the present invention, the sequence is a sequence that includes cyclic shifts, or a sequence defined by cyclic shifts.

[0314] In the base station of the present invention, the sequence of uplink control information containing ACK as HARQ-ACK is different from the sequence of uplink control information containing NACK as HARQ-ACK.

[0315] In the base station of the present invention, the physical resource block that is sent containing the uplink control information including the HARQ-ACK and the scheduling request is the same as the physical resource block that is sent containing the uplink control information including the HARQ-ACK.

[0316] In the base station of the present invention, for a 1-bit HARQ-ACK, the number of sequences allocated to a terminal is 4, and for a 2-bit HARQ-ACK, the number of sequences allocated to a terminal is 8.

[0317] In the base station of the present invention, when HARQ-ACK and scheduling request are simultaneously sent from the terminal, the uplink control information is received through one of the following modes: using the mode of the sequence of uplink control information containing the HARQ-ACK and the scheduling request; and using the mode of the sequence of uplink control information containing the HARQ-ACK and the mode of the sequence of uplink control information containing the scheduling request.

[0318] In the base station of the present invention, the transmitter sends information related to the resources of the PUCCH to the terminal, and the receiver receives the uplink control information generated and transmitted based on the information.

[0319] In the base station of the present invention, the information related to the resources of the PUCCH includes information related to the cyclic shifting of the sequence.

[0320] The communication method of the present invention includes the steps of: generating uplink control information containing HARQ-ACK for downlink data based on sequence selection; and transmitting the uplink control information using a 1-symbol uplink control channel, i.e., PUCCH, wherein the sequence of the uplink control information containing the HARQ-ACK is different from the sequence of the uplink control information containing the HARQ-ACK and a scheduling request.

[0321] The communication method of the present invention includes the steps of: sending downlink data to a terminal; and receiving uplink control information containing HARQ-ACK for the downlink data, which is sent from the terminal using a 1-symbol uplink control channel, i.e., PUCCH, wherein the uplink control information containing the HARQ-ACK is based on sequence selection, and the sequence of the uplink control information containing the HARQ-ACK is different from the sequence of the uplink control information containing the HARQ-ACK and a scheduling request.

[0322] The integrated circuit control of the present invention includes the following processes: generating uplink control information containing HARQ-ACK for downlink data based on sequence selection; and transmitting the uplink control information using a 1-symbol uplink control channel, i.e., PUCCH, for a sequence of uplink control information containing the HARQ-ACK, which is different from the sequence of uplink control information containing the HARQ-ACK and a scheduling request.

[0323] The integrated circuit control of the present invention performs the following processes: processing of sending downlink data to a terminal; and processing of receiving uplink control information containing HARQ-ACK for the downlink data sent from the terminal using a 1-symbol uplink control channel, i.e., PUCCH, wherein the uplink control information containing the HARQ-ACK is based on sequence selection, and the sequence of the uplink control information containing the HARQ-ACK is different from the sequence of the uplink control information containing the HARQ-ACK and a scheduling request.

[0324] The terminal of the present invention includes: a circuit that, among multiple modes of the channel structure relating to the uplink control channel, allocates uplink control information containing at least one of a response signal for downlink data and an uplink radio resource allocation request signal to resources of the uplink control channel based on a mode selected according to the operating environment of the terminal; and a transmitter that transmits the uplink control information.

[0325] The terminal of the present invention includes: a circuit that, when both a response signal for downlink data transmission and a radio resource allocation request signal for uplink transmission occur simultaneously, allocates uplink control information containing at least one of the response signal and the radio resource allocation request signal to resources of the uplink control channel, based on a mode selected according to the terminal's operating environment, among multiple modes of the channel structure relating to the uplink control channel; and a transmitter that transmits the uplink control information.

[0326] The terminal of the present invention includes: a circuit that allocates uplink control information, containing at least one of a response signal for downlink data and an uplink radio resource allocation request signal, to resources of an uplink control channel; and a transmitter that transmits the uplink control channel, for the terminal, a first resource allocated for transmitting the response signal, a second resource allocated for transmitting the radio resource allocation request signal, and a third resource allocated for transmitting a reference signal frequency multiplexed with the uplink control information, wherein the transmitter uses one of the first resource and the second resource, and the third resource, to transmit the uplink control information and the reference signal, wherein the first resource and the second resource are allocated to the same resource block.

[0327] In the terminal of the present invention, when either the response signal or the radio resource allocation request signal is transmitted, the circuit allocates the uplink control information to the resources of the uplink control channel based on a mode related to the channel structure that is common in any operating environment of the terminal.

[0328] In the terminal of the present invention, the plurality of modes include at least a first mode and a second mode in which the maximum transmit power to average power ratio (PAPR) is lower than that of the first mode. When the operating environment of the terminal is an interference-limited environment, the circuit allocates the uplink control information to the uplink resources based on the first mode, and when the operating environment of the terminal is a power-limited environment, the circuit allocates the uplink control information to the uplink resources based on the second mode.

[0329] In the terminal of the present invention, the plurality of modes include at least a first mode and a second mode in which the utilization efficiency of uplink resources is lower than that of the first mode. When the working environment of the terminal is an interference-limited environment, the circuit allocates the uplink control information to the uplink resources based on the first mode. When the working environment of the terminal is a power-limited environment, the circuit allocates the uplink control information to the uplink resources based on the second mode.

[0330] In the terminal of the present invention, multiple sequences used in the resources of the uplink control channel are divided into multiple groups, and sequences within the same group are allocated to the same terminal.

[0331] In the terminal of the present invention, among the multiple sequences used in the resources of the uplink control channel, sequences within the same resource block, or sequences within the coherent bandwidth are allocated to the same terminal.

[0332] In the terminal of the present invention, among the multiple sequences used in the resources of the uplink control channel, sequences of different resource blocks are allocated to the same terminal, and in the different resource blocks, the position of at least one resource block is represented by an offset value indicating the position relative to the position of other resource blocks.

[0333] The communication method of the present invention includes the following steps: among multiple modes of the channel structure of the uplink control channel, based on a mode selected according to the operating environment of the terminal, uplink control information containing at least one of a response signal for downlink data and an uplink radio resource allocation request signal is allocated to the resources of the uplink control channel, and the uplink control information is transmitted.

[0334] The communication method of the present invention includes the following steps: when a response signal for downlink data and a radio resource allocation request signal for uplink are simultaneously transmitted, among multiple modes of the channel structure of the uplink control channel, based on a mode selected according to the operating environment of the terminal, uplink control information containing at least one of the response signal and the radio resource allocation request signal is allocated to the resources of the uplink control channel, and the uplink control information is transmitted.

[0335] The communication method of the present invention includes the following steps: allocating uplink control information containing at least one of a response signal for downlink data and an uplink radio resource allocation request signal to resources of an uplink control channel; transmitting the uplink control channel; for a terminal, allocating a first resource for transmitting the response signal, a second resource for transmitting the radio resource allocation request signal, and a third resource for transmitting a reference signal frequency multiplexed with the uplink control information; using one of the first resource and the second resource, and the third resource, transmitting the uplink control information and the reference signal; wherein the first resource and the second resource are allocated to the same resource block.

[0336] One aspect of the present invention is useful for mobile communication systems.

[0337] Label Explanation

[0338] 100 base stations

[0339] 101, 209 control units

[0340] 102 Data Generation Unit

[0341] 103, 107, 110, 213 coding units

[0342] 104 Retransmission Control Unit

[0343] 105, 108, 111, 211, 214 modulation units

[0344] 106 High-level control signal generation unit

[0345] 109 Downlink Control Signal Generation Unit

[0346] 112, 215 signal distribution units

[0347] 113,216 IFFT cells

[0348] Transmitting units 114 and 217

[0349] 115, 201 antennas

[0350] 116, 202 receiving units

[0351] 117,203 FFT cells

[0352] 118,204 extraction units

[0353] 119SR Detection Unit

[0354] 120PUCCH demodulation and decoding unit

[0355] 121 Decision Unit

[0356] 200 terminals

[0357] 205 Downlink Control Signal Demodulation Unit

[0358] 206 High-level control signal demodulation unit

[0359] 207 Downlink Data Signal Demodulation Unit

[0360] 208 Error Detection Unit

[0361] 210SR generation unit

[0362] 212HARQ-ACK generation unit

Claims

1. A terminal, comprising: The circuit generates uplink control information containing HARQ-ACK for downlink data based on sequence selection; as well as The transmitter uses a 1-symbol uplink control channel, i.e., PUCCH, to send the uplink control information. The sequence containing the uplink control information of the HARQ-ACK differs from the sequence containing the uplink control information of the HARQ-ACK and the scheduling request. When sending HARQ-ACK and scheduling requests, the uplink control information is generated based on one of the following modes according to the terminal's operating environment: Use the pattern for the sequence of uplink control information that includes the HARQ-ACK and the scheduling request; as well as The patterns used are those for the sequence containing the HARQ-ACK uplink control information and the sequence containing the scheduling request uplink control information. The physical resource block in which the uplink control information containing the HARQ-ACK and scheduling request is sent is the same as the physical resource block in which the uplink control information containing the HARQ-ACK is sent.

2. The terminal according to claim 1, wherein, The HARQ-ACK is 1 bit or 2 bits.

3. The terminal according to claim 1 or 2, wherein, For a 1-bit HARQ-ACK, the maximum number of terminals that can be reused in the same physical resource block is 6.

4. The terminal according to claim 1, wherein, The sequence is a sequence that includes cyclic shifts, or a sequence defined by cyclic shifts.

5. The terminal according to claim 1, wherein, The sequence of uplink control information containing ACK as the HARQ-ACK is different from the sequence of uplink control information containing NACK as the HARQ-ACK.

6. The terminal according to claim 2, wherein, For a 1-bit HARQ-ACK, the number of sequences assigned to a terminal is 4. For the 2-bit HARQ-ACK, the number of sequences assigned to a terminal is 8.

7. The terminal according to claim 1, wherein, It also includes: a receiver that receives information related to the resources of the PUCCH. Based on the information, the terminal generates and sends the uplink control information.

8. The terminal according to claim 7, wherein, The information related to the resources of the PUCCH includes information related to the cyclic shifting of the sequence.

9. A base station, comprising: The transmitting unit sends downlink data to the terminal; as well as The receiver receives uplink control information, including HARQ-ACK for the downlink data, transmitted from the terminal using a 1-symbol uplink control channel, i.e., PUCCH. The uplink control information including the HARQ-ACK is based on sequence selection. The sequence containing the uplink control information of the HARQ-ACK differs from the sequence containing the uplink control information of the HARQ-ACK and the scheduling request. When both a HARQ-ACK and a scheduling request are sent from the terminal, the uplink control information is received based on one of the following modes according to the terminal's operating environment: Use the pattern for the sequence of uplink control information that includes the HARQ-ACK and the scheduling request; as well as The patterns used are those for the sequence containing the HARQ-ACK uplink control information and the sequence containing the scheduling request uplink control information. The physical resource block in which the uplink control information containing the HARQ-ACK and scheduling request is sent is the same as the physical resource block in which the uplink control information containing the HARQ-ACK is sent.

10. The base station according to claim 9, wherein, The HARQ-ACK is 1 bit or 2 bits.

11. The base station according to claim 9 or 10, wherein, For a 1-bit HARQ-ACK, the maximum number of terminals that can be reused in the same physical resource block is 6.

12. The base station according to claim 9, wherein, The sequence is a sequence that includes cyclic shifts, or a sequence defined by cyclic shifts.

13. The base station according to claim 9, wherein, The sequence of uplink control information containing ACK as the HARQ-ACK is different from the sequence of uplink control information containing NACK as the HARQ-ACK.

14. The base station according to claim 10, wherein, For a 1-bit HARQ-ACK, the number of sequences assigned to a terminal is 4. For the 2-bit HARQ-ACK, the number of sequences assigned to a terminal is 8.

15. The base station according to claim 9, wherein, The transmitter sends information related to the resources of the PUCCH to the terminal. The receiver receives the uplink control information generated and transmitted based on the information.

16. The base station according to claim 15, wherein, The information related to the resources of the PUCCH includes information related to the cyclic shifting of the sequence.

17. A communication method, comprising: The step of the terminal generating uplink control information containing HARQ-ACK for downlink data based on sequence selection; as well as The step of the terminal using a 1-symbol uplink control channel, i.e., PUCCH, to transmit the uplink control information. The sequence containing the uplink control information of the HARQ-ACK differs from the sequence containing the uplink control information of the HARQ-ACK and the scheduling request. When the terminal sends a HARQ-ACK and scheduling request, it generates the uplink control information based on one of the following modes according to the terminal's operating environment: Use the pattern for the sequence of uplink control information that includes the HARQ-ACK and the scheduling request; as well as The patterns used are those for the sequence containing the HARQ-ACK uplink control information and the sequence containing the scheduling request uplink control information. The physical resource block in which the uplink control information containing the HARQ-ACK and scheduling request is sent is the same as the physical resource block in which the uplink control information containing the HARQ-ACK is sent.

18. A communication method, comprising: The steps by which a base station sends downlink data to a terminal; as well as The step of the base station receiving uplink control information containing HARQ-ACK for the downlink data transmitted from the terminal using a 1-symbol uplink control channel, i.e., PUCCH. The uplink control information including the HARQ-ACK is based on sequence selection. The sequence containing the uplink control information of the HARQ-ACK differs from the sequence containing the uplink control information of the HARQ-ACK and the scheduling request. When the base station receives both a HARQ-ACK and a scheduling request from the terminal, it receives the uplink control information based on one of the following modes according to the terminal's operating environment: Use the pattern for the sequence of uplink control information that includes the HARQ-ACK and the scheduling request; as well as The patterns used are those for the sequence containing the HARQ-ACK uplink control information and the sequence containing the scheduling request uplink control information. The physical resource block in which the uplink control information containing the HARQ-ACK and scheduling request is sent is the same as the physical resource block in which the uplink control information containing the HARQ-ACK is sent.

19. An integrated circuit, comprising: The circuit generates uplink control information containing HARQ-ACK for downlink data based on sequence selection. as well as The transmitter uses a 1-symbol uplink control channel, i.e., PUCCH, to transmit the processing of the uplink control information. The sequence containing the uplink control information of the HARQ-ACK differs from the sequence containing the uplink control information of the HARQ-ACK and the scheduling request. When sending HARQ-ACK and scheduling requests, the uplink control information is generated based on one of the following modes according to the terminal's operating environment: Use the pattern for the sequence of uplink control information that includes the HARQ-ACK and the scheduling request; as well as The patterns used are those for the sequence containing the HARQ-ACK uplink control information and the sequence containing the scheduling request uplink control information. The physical resource block in which the uplink control information containing the HARQ-ACK and scheduling request is sent is the same as the physical resource block in which the uplink control information containing the HARQ-ACK is sent.

20. An integrated circuit, comprising: The transmitting unit processes downlink data sent to the terminal. as well as The receiver receives and processes uplink control information, including HARQ-ACK for the downlink data, transmitted from the terminal using a 1-symbol uplink control channel (PUCCH). The uplink control information including the HARQ-ACK is based on sequence selection. The sequence containing the uplink control information of the HARQ-ACK differs from the sequence containing the uplink control information of the HARQ-ACK and the scheduling request. When both a HARQ-ACK and a scheduling request are sent from the terminal, the uplink control information is received based on one of the following modes according to the terminal's operating environment: Use the pattern for the sequence of uplink control information that includes the HARQ-ACK and the scheduling request; as well as The patterns used are those for the sequence containing the HARQ-ACK uplink control information and the sequence containing the scheduling request uplink control information. The physical resource block in which the uplink control information containing the HARQ-ACK and scheduling request is sent is the same as the physical resource block in which the uplink control information containing the HARQ-ACK is sent.

Images