Method performed by base station, method performed by ue, base station, and ue

Abstract

To provide a method and a device for transmitting uplink (UL) information, and a method and a device for receiving the UL information.SOLUTION: A method for transmitting UL information includes transmitting a reference signal using a first sequence and transmitting UL control information using a second sequence, where the reference signal and the UL control information are multiplexed in an alternately staggered manner in the frequency domain. The uplink information can be transmitted with reduced uplink symbols to fit a proposed sub-frame structure accompanied by reduced uplink symbols, thus significantly reducing transmission waiting time.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] FIELD Embodiments of the present disclosure relate generally to wireless communication technologies, and more particularly to a method and apparatus for transmitting uplink (UL) information and a method and apparatus for receiving UL information. [Background technology]

[0002] In existing wireless communications, a subframe comprises two slots, each containing seven symbols. As shown in Figure 1, all seven symbols in a slot can be used as UL symbols for Physical Uplink Control Channel (PUCCH) transmission, Demodulation Reference Signal (DMRS) transmission, etc. The PUCCH is a UL channel that carries uplink control information, such as ACK / NACK, Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), (Rank Indicator) RI, etc. As shown in Figure 1, three middle symbols are used to transmit DMRS, and the other symbols are used to transmit PUCCH symbols.

[0003] Typically, after a symbol is transmitted, an ACK / NACK is received on the PUCCH before four more symbols are transmitted, which means substantial latency. To reduce latency, it has been proposed to reduce the number of UL symbols. In future 5th generation (5G) communications, a one-symbol-only frame configuration has been proposed to reduce latency, meaning there is one or more symbols for UL transmission. For illustrative purposes, FIG. 2 shows one possible new subframe configuration, with only one symbol for UL transmission. However, it should be understood that in other possible new subframe configurations, the symbols may be located in different positions and / or may comprise multiple UL symbols.

[0004] Therefore, a new PUCCH channel structure and a new UL information transmission solution are required to accommodate the frame structure with reduced UL symbols. Summary of the Invention [Problem to be solved by the invention]

[0005] In the present disclosure, a new solution for UL information transmission and reception is provided that alleviates or at least mitigates at least some of the problems of the prior art. [Means for solving the problem]

[0006] According to a first aspect of the present disclosure, there is provided a method for transmitting UL information, the method comprising: transmitting a reference signal using a first sequence and transmitting UL control information using a second sequence, wherein the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

[0007] In a second aspect of the present disclosure, there is provided a method for receiving UL information, the method comprising: receiving a reference signal transmitted using a first sequence, receiving control information transmitted using a second sequence, and demodulating the control information using the reference signal, wherein the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

[0008] In a third aspect of the present disclosure, there is also provided an apparatus for transmitting UL information, the apparatus comprising: a reference signal transmitter configured to transmit a reference signal using a first sequence; and a control information transmitter configured to transmit UL control information using a second sequence, wherein the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

[0009] In a fourth aspect of the present disclosure, there is provided an apparatus for receiving UL information, the apparatus comprising: a reference signal receiver configured to receive a reference signal transmitted using a first sequence; a control information receiver configured to receive control information transmitted using a second sequence; and a demodulator configured to demodulate the control information using the reference signal, wherein the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

[0010] According to a fifth aspect of the present disclosure, there is provided a computer-readable storage medium having computer program code embodied thereon, the computer program code being configured, when executed, to cause an apparatus to perform operations in the method according to any of the embodiments of the first aspect.

[0011] According to a sixth aspect of the present disclosure, there is provided a computer-readable storage medium having computer program code embodied thereon, the computer program code being configured, when executed, to cause an apparatus to perform operations in the method according to any of the embodiments of the second aspect.

[0012] According to a seventh aspect of the present disclosure, there is provided a computer program product comprising a computer-readable storage medium according to the fifth aspect.

[0013] According to an eighth aspect of the present disclosure, there is provided a computer program product comprising the computer-readable storage medium according to the sixth aspect.

[0014] Embodiments of the present disclosure provide a new solution for UL transmission and reception, in which the uplink information can be transmitted with reduced uplink symbols to accommodate a reduced uplink symbol subframe structure, and thus the transmission latency can be significantly reduced. [Brief explanation of the drawings]

[0015] The above and other features of the present disclosure will become more apparent through the detailed description of the illustrated embodiments with reference to the accompanying drawings, in which like reference numerals refer to the same or similar elements throughout.

[0016] [Figure 1] Figure 1 shows a schematic of a UL symbol within an existing subframe structure.

[0017] [Figure 2] FIG. 2 shows a schematic diagram of one of the possible UL symbols in the newly proposed subframe structure with reduced UL symbols.

[0018] [Figure 3] FIG. 3 shows a schematic diagram of a PUCCH pattern in an existing communication system.

[0019] [Figure 4] FIG. 4 shows a schematic diagram of a constellation mapping for HARQ ACK / NACK.

[0020] [Figure 5] FIG. 5 shows a schematic diagram of UL information transmission in the existing PUCCH format 1a / 1b.

[0021] [Figure 6] FIG. 6 shows a schematic representation of the basic sequence of UL symbols.

[0022] [Figure 7] FIG. 7 illustrates a schematic diagram of UL information transmission in the existing PUCCH format 2a / 2b.

[0023] [Figure 8] FIG. 8 schematically illustrates a flowchart of a method for transmitting UL information according to an embodiment of the present disclosure.

[0024] [Figure 9]FIG. 9 illustrates a schematic diagram of DMRS and PUCCH information transmission according to one embodiment of the present disclosure.

[0025] [Figure 10] FIG. 10 illustrates a schematic example of a new PUCCH structure according to one embodiment of the present disclosure.

[0026] [Figure 11] FIG. 11 illustrates schematically another base sequence that may be used for DMRS and PUCCH information in accordance with one embodiment of the present disclosure.

[0027] [Figure 12] FIG. 12 illustrates schematically another new PUCCH structure according to another embodiment of the present disclosure.

[0028] [Figure 13] FIG. 13 illustrates schematically a further new PUCCH structure according to a further embodiment of the present disclosure.

[0029] [Figure 14A] FIG. 14A illustrates a schematic diagram of an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure. [Figure 14B] FIG. 14B illustrates a schematic diagram of an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure. [Figure 14C] FIG. 14C illustrates a schematic diagram of an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure. [Figure 14D] FIG. 14D illustrates a schematic diagram of an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure. [Figure 14E] FIG. 14E illustrates a schematic diagram of an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure.

[0030] [Figure 15A] FIG. 15A illustrates a schematic diagram of an example of a resource mapping method according to an embodiment of the present disclosure. [Figure 15B]FIG. 15B illustrates a schematic diagram of an example of a resource mapping method according to an embodiment of the present disclosure. [Figure 15C] FIG. 15C illustrates a schematic example of a resource mapping method according to an embodiment of the present disclosure. [Figure 15D] FIG. 15D illustrates a schematic example of a resource mapping method according to an embodiment of the present disclosure. [Figure 15E] FIG. 15E illustrates a schematic example of a resource mapping method according to an embodiment of the present disclosure. [Figure 15F] FIG. 15F illustrates a schematic diagram of an example resource mapping method according to an embodiment of the present disclosure.

[0031] [Figure 16A] FIG. 16A illustrates a schematic diagram of an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure. [Figure 16B] FIG. 16B illustrates a schematic diagram of an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure. [Figure 16C] FIG. 16C illustrates a schematic diagram of an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure. [Figure 16D] FIG. 16D illustrates a schematic diagram of an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure.

[0032] [Figure 17A] FIG. 17A illustrates a schematic diagram of an example of a resource mapping method according to one embodiment of the present disclosure. [Figure 17B] FIG. 17B illustrates a schematic example of a resource mapping method according to one embodiment of the present disclosure. [Figure 17C] FIG. 17C illustrates a schematic example of a resource mapping method according to one embodiment of the present disclosure. [Figure 17D] FIG. 17D illustrates a schematic example of a resource mapping method according to one embodiment of the present disclosure.

[0033] [Figure 18A]FIG. 18A illustrates a schematic diagram of an example of a resource mapping method for a common representation according to one embodiment of the present disclosure. [Figure 18B] FIG. 18B illustrates a schematic diagram of an example of a resource mapping method for a common representation according to one embodiment of the present disclosure. [Figure 18C] FIG. 18C illustrates a schematic example of a resource mapping method for a common representation according to one embodiment of the present disclosure. [Figure 18D] FIG. 18D illustrates a schematic example of a resource mapping method for a common representation according to one embodiment of the present disclosure.

[0034] [Figure 19] FIG. 19 illustrates a block diagram of DMRS and PUCCH information transmission according to another embodiment of the present disclosure.

[0035] [Figure 20] FIG. 20 illustrates a schematic diagram of a new PUCCH structure according to another embodiment of the present disclosure.

[0036] [Figure 21] FIG. 21 schematically illustrates a correspondence between modulation symbols and sequence groups according to one embodiment of the present disclosure.

[0037] [Figure 22] FIG. 22 illustrates a schematic diagram of a constellation mapping according to one embodiment of the present disclosure.

[0038] [Figure 23] FIG. 23 illustrates a schematic diagram of cyclic shift grouping according to one embodiment of the present disclosure.

[0039] [Figure 24] FIG. 24 schematically illustrates an ACH / NACK constellation mapping for one of the example cyclic shift groupings shown in FIG. 21, according to one embodiment of the present disclosure.

[0040] [Figure 25] FIG. 25 illustrates schematically a further PUCCH structure according to a further embodiment of the present disclosure.

[0041] [Figure 26A] FIG. 26A illustrates schematically another option for PUCCH design according to one embodiment of the present disclosure. [Figure 26B] FIG. 26B illustrates schematically another option for PUCCH design according to one embodiment of the present disclosure.

[0042] [Figure 27A] FIG. 27A illustrates schematically another possible UL region design according to another embodiment of the present disclosure. [Figure 27B] FIG. 27B schematically illustrates another possible UL region design according to another embodiment of the present disclosure.

[0043] [Figure 28A] FIG. 28A schematically illustrates another DMRS window design according to another embodiment of the present disclosure. [Figure 28B] FIG. 28B schematically illustrates another DMRS window design according to another embodiment of the present disclosure. [Figure 28C] FIG. 28C schematically illustrates another DMRS window design according to another embodiment of the present disclosure.

[0044] [Figure 29] FIG. 29 schematically illustrates a flowchart of a method for receiving UL information according to one embodiment of the present disclosure.

[0045] [Figure 30] FIG. 30 schematically illustrates a block diagram of an apparatus for transmitting UL information according to one embodiment of the present disclosure.

[0046] [Figure 31] FIG. 31 schematically illustrates a block diagram of an apparatus for receiving UL information according to one embodiment of the present disclosure.

[0047] [Figure 32] FIG. 32 further shows a simplified block diagram of an apparatus 3310 that may be embodied as or included in a UE and an apparatus 3320 that may be embodied as or included in a base station of a wireless network described herein. DETAILED DESCRIPTION OF THE INVENTION

[0048]

[0023] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be understood that these embodiments are provided only to enable those skilled in the art to better understand and practice the present disclosure, and are not intended to limit the scope of the present disclosure.

[0049] In the accompanying drawings, various embodiments of the present disclosure are illustrated in block diagrams, flowcharts, and other figures. Each block in a flowchart or block may represent a module, program, or portion of code containing one or more executable instructions for performing a specified logical function, and in this disclosure, dispensable blocks are illustrated with dotted lines. Furthermore, although these blocks are shown in a specific sequence for performing the steps of the method, in reality, they do not have to be performed strictly according to the sequence shown. For example, they may be performed in reverse order or simultaneously depending on the nature of each operation. It should also be noted that the block diagrams of the flowcharts and / or each block and combinations thereof may be realized by a dedicated hardware-based system for performing specific functions / operations, or by a combination of dedicated hardware and computer instructions.

[0050] In general, terms used in the claims are to be interpreted according to their ordinary meaning in the art, unless expressly defined otherwise. References to "a / an / the / said 'element, device, component, means, step, etc.'" are to be openly interpreted as a reference to at least one instance of an element, device, component, means, unit step, etc., without excluding a plurality of such devices, components, means, units, steps, etc., unless expressly stated otherwise. Also, the indefinite article "a / an" as used herein does not exclude a plurality of such steps, units, modules, devices, objects, etc.

[0051] Additionally, in the context of this disclosure, User Equipment (UE) may refer to a terminal, a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a mobile station (MS), or an access terminal (AT), and may include some or all of the functionality of a UE, terminal, MT, SS, PSS, MS, or AT. Further, in the context of this disclosure, the term "BS" may represent, for example, a Node B (Node B or NB), an evolved Node B (eNode B or eNB), a radio header (RH), a remote radio head (RRH), a relay, or a low-power node such as a femto, pico, etc.

[0052] As described above, in the existing subframe, all seven symbols in a slot can be used as UL symbols. Hereinafter, the PUCCH pattern in the existing communication will be described with reference to Figures 3 to 7 for a better understanding of the present disclosure.

[0053] First, refer to Figure 3, which shows the PUCCH pattern in existing communication systems in more detail, where UL subframe k and UL subframe k+8 are shown, and in particular, in each subframe, the PUCCH is transmitted at the edge of the system bandwidth and hops by two slots.

[0054] In existing communications, the PUCCH format includes Format 1a / 1b and Format 2a / 2b. Format 1a / 1b is used to transmit one or two ACK / NACK bits, and Format 2a / 2b is used to transmit uplink CQI and one or two ACK / NACK bits. Typically, PUCCH bits, such as ACK / NACK bits, are modulated onto ACK / NACK symbols through constellation mapping. Different constellation mappings are used for different modulation techniques. Figure 4 illustrates different constellation mappings for HARQ ACK / NACK. As shown in Figures 4 and 5, in the case of BPSK (Binary Phase Shift Keying), ACK=1 and DTX / NACK=0 are mapped to -1 and +1, respectively, and in the case of QPSK (Quadrature Phase Shift Keying), (ACK / NACK)=11, (ACK / NACK)=00, (ACK / NACK)=10, and (ACK / NACK)=01 are mapped to +1, -1, +j, and -j, respectively.

[0055] Figure 5 illustrates UL information transmission in the existing PUCCH format 1a / 1b. As shown in Figure 5, after being modulated into an ACK / NACK symbol through constellation mapping, the ACK / NACK symbol is multiplied by a length-12 base sequence. The base sequence is shown in Figure 6. The base sequence is shifted using different cyclic shifts and further multiplied by an OCC sequence as shown in Figure 5. The resulting signal is further processed through an inverse fast Fourier transform (IFFT) to form single-carrier frequency-division multiple access (SC-FDMA) symbols #0, #1, #5, and #6. Meanwhile, the shifted base sequence is multiplied by the OCC sequence, and the resulting signal is processed through an IFFT to form a DM-RS symbol. In other words, the formation of DMRS and PUCCH is substantially similar, except that the NACK symbol d0 is not multiplied by the DM-RS symbol.

[0056] Figure 7 shows a schematic diagram of a PUCCH pattern in existing PUCCH format 2a / 2b. The PUCCH pattern in Figure 7 is similar to that shown in Figure 5, except that the OCC sequence is not used, the coded CSI bits (10 bits) after QPSK modulation are converted into five pieces of data d0 to d5 through serial-parallel processing, and the PUCCH symbols and DMRS symbols have different positions.

[0057] As mentioned above, when using reduced UL symbols, existing PUCCH patterns cannot be used, so the present invention provides a new PUCCH design and a new solution for transmitting and receiving UL control information, which will be described with reference to Figures 8 to 32.

[0058] 8 is a schematic flowchart of a method for transmitting UL information according to an embodiment of the present disclosure. As shown in FIG. 8, first, in step 810, a reference signal is transmitted using a first sequence, and in step 820, UL control information is transmitted using a second sequence, and in particular, the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

[0059] For better understanding of the present disclosure, Figure 9 further illustrates a diagram of DMRS and PUCCH information transmission according to one embodiment of the present disclosure. As shown in Figure 9, for DMRS, a base sequence 1 having a length of N is first transformed into R'1 through a transformation such as a cyclic shift or phase rotation, and then mapped to a physical resource. At the same time, PUCCH information bits are first mapped to information symbols through one of the constellation mappings shown in Figure 4. Then, information symbols d i is further multiplied by, for example, a cyclically shifted sequence R'2 from a base sequence 2 having a length of M. The result Y is then mapped to a physical resource.

[0060] PUCCH information is transmitted together with DMRS. When mapping to resources, the reference signal and UL control information are multiplexed in a staggered manner in the frequency domain, as shown in FIG. 10, which illustrates an exemplary new PUCCH configuration according to one embodiment of the present disclosure. As shown in FIG. 10, PUCCH and DMRS share the same base sequence of length 12, as shown in FIG. 6, for example. To obtain PUCCH symbol d0, PUCCH (e.g., ACK / NACK) bits {0,1} are first modulated onto PUCCH symbols after constellation mapping. The constellation mapping may be performed according to that shown in FIG. 4. The PUCCH symbols are then modulated onto a base sequence that is also used for DMRS. The PUCCH symbol Y modulated onto the base sequence n can be expressed as follows: Y n =d0·R n , n=0,1,...,11

[0061] where Y n denotes the resulting symbol after modulation, d0 denotes the PUCCH symbol after constellation mapping, and R n denotes the base sequence. Therefore, for PUCCH, the total number of resource elements is 24.

[0062] 11 illustrates another base sequence that may be used for DMRS and PUCCH information according to an embodiment of the present disclosure. n (i) can be based on an OCC / DFT sequence, which has a length of 6, and there are six orthogonal sequences with indices ranging from 0 to 5. Therefore, it is clear that the DMRS and PUCCH sequences are not limited to those shown in Figure 6 or Figure 11, and in fact, any suitable sequence can be used as long as frequency orthogonality is guaranteed.

[0063] 12 shows another new PUCCH structure according to another embodiment of the present disclosure, which is used with a base sequence as shown in FIG. 11. As shown in FIG. 12, PUCCH and DMRS also share the same base sequence, but the length of the base sequence is 6, for example, as shown in FIG. 11. Similarly, to obtain PUCCH symbol d0, PUCCH (e.g., ACK / NACK) bits {0,1} are first modulated onto PUCCH symbols after constellation mapping. Constellation mapping can also be performed according to that shown in FIG. 4. The PUCCH symbols are then modulated on a base sequence of length 6. The PUCCH symbol Y modulated on the base sequence is n can be expressed as follows: Y n =d0·R n (i), i=0,1,...,5 where Y n denotes the resulting symbol after modulation, d0 denotes the PUCCH symbol after constellation mapping, and R n(i) denotes the sequence with index i.

[0064] The PUCCH symbols are transmitted with the DMRS and are multiplexed in a staggered manner in the frequency domain, as shown in Figure 12. Therefore, for such a PUCCH, the total number of resource elements is 12.

[0065] In a further embodiment of the present disclosure, the DMRS uses a base sequence of length 12, for example as shown in Figure 6, while the PUCCH uses a different sequence, for example as shown in Figure 11. Figure 13 schematically illustrates a further new PUCCH configuration according to a further embodiment of the present disclosure, which can be used in this embodiment where sequences of different lengths are used. In such a case, the PUCCH symbol Y modulated on the base sequence n can be expressed as follows: Y n =d0·S(i), i=0,1,...,5 where Y n denotes the resulting symbol after modulation, d0 denotes the PUCCH symbol after constellation mapping, and S(i) denotes the basic sequence of PUCCH with index i, as shown in Figure 11. For such a PUCCH, two PUCCH symbols are transmitted with DMRS, thereby being staggered multiplexed, and the total number of resource elements is 24.

[0066] Therefore, in FIG. 9, the two base sequences R1 and R2 shown in the figure may be the same sequence. For example, PUCCH can use the base sequence for DMRS as shown in FIG. 6 and FIG. 11. The base sequences R1 and R2 can share the same base sequence. Alternatively, the two base sequences may be different. For example, the base sequence R2 may be a different root sequence of the base sequence R1. The two base sequences R1 and R2 can have the same length, i.e., M=N, or different lengths, i.e., M≠N. The sequence R'1 (first sequence) for DMRS can be the same as the base sequence R1, or the sequence R'1 can be converted from the base sequence R1 through cyclic shift or phase rotation. The sequence R'2 (second sequence) for modulating the PUCCH symbol can be the same as the base sequence R2, or the sequence R'1 can be converted from the base sequence R1 through cyclic shift or phase rotation.

[0067] In embodiments of the present disclosure, PUCCH and RS may be staggered multiplexed in many different ways. For illustration, Figures 14A to 14E show some exemplary multiplexing schemes in the frequency domain. As shown in Figure 14A, RS and PUCCH may be staggered multiplexed every RE, i.e., one RS for one PUCCH. In Figure 14B, RS and PUCCH may be staggered multiplexed every k REs, i.e., one RS for k PUCCHs, and c i and d mare modulation symbols that can come from the same UE or different UEs. Figure 14C shows another example of a multiplexing method similar to that of Figure 14B, but in Figure 14C, the PUCCHs are separated by DMRSs rather than being contiguous in frequency. Figure 14D shows yet another example multiplexing method, in which the RSs and PUCCHs use sequences of different lengths, and one PUCCH uses one RS. Figure 14E shows a further example multiplexing scheme according to a further embodiment of the present disclosure. In Figure 14E, the PUCCHs are not separated by DMRSs but are contiguous in frequency, which means that the DMRSs are also contiguous in frequency.

[0068] For purposes of illustration, the following provides a common representation of one UL symbol transmission, where d mn (m>=0, n>=0) denotes the modulation symbols of the information bits. For a given m or n, the symbols can be the same, in other words: d mi =d mj , or d in =d jn Furthermore, the symbols may have, for example, different phase rotations. d mi =e jkθ *d mj , or d in =e jkθ *d jn Symbols can have different orders, for example, one has ascending order and one has descending order, as shown below: d 00 =d 1n , d 01 =d 1n-1 , ...d 0n =d 10 Also, the symbols may be completely different.

[0069] RS Sequence R mnFor (m>=0, n>=0), the sequence is also the same for a given m or n. In another embodiment of the present disclosure, the RS sequence R mn can be different for a given m or n. Furthermore, the symbols may be based on the same base sequence but have different phase rotation or cycle shift values.

[0070] 15A to 15F schematically illustrate an exemplary resource mapping method according to an embodiment of the present disclosure. As shown in FIG. 15A, both the sequence-based DMRS sequence and the modulated PUCCH are mapped, for example, in order. The modulated PUCCH symbols are d 00 ,d 01 ...d 0n ,d 10 ,d 11 ,...d 1n ,...d m0 ,d m1 ,...d mn and the DMRS sequence is R 00 ,R 01 ...R 0n ,R 10 ,R 11 ,...R 1n ,...d m0 ,d m1 ,...d mn In contrast, in FIG. 15B, the DMRS sequence and modulated PUCCH based on the sequence are mapped from the edge of the band.

[0071] In an embodiment of the present disclosure, PUCCHs accompanied by DMRSs can be arranged on physical resource blocks (PRBs) in a predetermined order within a predefined RB. For example, as shown in FIG. 15C, different PUCCH symbols can be arranged on different PRBs. For frequency diversity, as shown in FIG. 15D, PUCCH symbols can be mapped to both edges of the system band. In FIG. 15D, DMRS R0 and PUCCH d0*R'1 are mapped to the first edge of the system band. DMRS R1 and PUCCH d1*R'1 are mapped to the second edge of the system band, DMRS R2 and PUCCH d2*R'2 are mapped to the first edge of the remaining system band, DMRS R3 and PUCCH d3*R'3 are mapped to the second edge of the remaining system band, and so on.

[0072] In another embodiment of the present disclosure, a copy of the PUCCH and DMRS can be placed on a PRB. For example, as shown in FIG. 15E, 00 ,R 10 ,~R m0 and PUCCH d0*R' 00 ,d1*R' 10 or d m *R' m0 is first mapped onto the first edge of the system band, and DMRS R 01 ,R 11 ~R m1 and PUCCH d0*R' 01 ,d1*R' 11 or d m *R' m1 is then mapped from the second opposite edge of the system band, and so on. Furthermore, FIG. 15F also shows another resource mapping scheme, where DMRS R 00 ,R 10 ~R m0 and PUCCH d0*R' 00 ,d1*R' 10 or d m *R' m0Similar to FIG. 15E, it is first mapped from the first edge of the system band, and DMRS R m1 ,R m-11 to R 01 and PUCCH d0*R’ 01 ,d1*R’ m-1 to d m *R’ 01 are then mapped from the opposite edge of the second side of the system band in an order different from that in FIG. 15E, and the same applies hereinafter. Further, the replicas of PUCCH in different PRBS can also be arranged on the PRB as shown in FIG. 15A or FIG. 15B.

[0073] It should also be noted that the mapping order (e.g., hopping) can be changed in a predefined order in different symbols / subframes / PRBs.

[0074] Above, the present disclosure is mainly described by referring to one UL symbol design. In fact, it can also be used in the frame design of L UL symbols. This means that a subframe can have a reduced number of UL symbols, but the number of UL symbols is greater than 1.

[0075] For each of the L UL symbols, PUCCH and DMRS can be multiplexed by staggering them in the same way, as shown in FIG. 16A for example. Alternatively, as shown in FIG. 16B, there may be hopping between two symbols. Further, for M (1 <= M <= L) symbols within the L symbols, the sequences of PUCCH and RS can be multiplexed by staggering them at a frequency of one or more REs each, and as shown in FIG. 16C, the other (L - K) symbols can be used for PUCCH.

[0076] In another embodiment of the present disclosure, the PUCCH and RS sequences can be multiplexed in a staggered manner in time. In other words, M (1<=M<=L) symbols can be used for RS (either consecutive or staggered), and others can be used for PUCCH, as shown in Figure 16D.

[0077] Figures 17A and 17B show the mapping of PUCCH and RS within a sequence, and Figures 17C and 17D show the mapping of PUCCH and DMRS from the edge of the system band. From Figures 17A and 17B, it can be seen that for L UL symbols, PUCCH and DMRS are time-multiplexed and placed on PRBs in a predetermined order. For example, PUCCH with DMRS can be mapped sequentially as shown in Figure 17A, or from both edges of the system band as shown in Figure 17C. Furthermore, overlapping PUCCH with DMRS can also be placed on PRBs. As another alternative, PUCCH and DMRS can hop within a symbol as shown in Figures 17B and 17D. Additionally, for illustrative purposes only, Figures 18A through 18D show the mapping of PUCCH and DMRS within a sequence and show the mapping from the edge of the system band for a common representation.

[0078] FIG. 19 is a block diagram illustrating a DMRS and PUCCH information transmission according to another embodiment of the present disclosure. In this embodiment of the present disclosure, the PUCCH information symbols are not modulated based on a second sequence, but are instead indicated by the relationship between the first and second sequences to be transmitted. As shown in FIG. 19, for DMRS, an N-length base sequence 1 is first transformed into R′1 through a transformation such as a cyclic shift or phase rotation, and then mapped to physical resources. At the same time, PUCCH information bits are first mapped to information symbols through one of the constellation mappings shown in FIG. 4. A sequence R′2 is transformed from an M-length base sequence 2, e.g., cyclically shifted or phase rotated from the base sequence 2. The resulting sequence R′2 is then mapped to physical resources. In this solution, information symbols d i is not further multiplied by the sequence R'2 as in Figure 9. Instead, the information symbol d i is implied by the relationship between sequence R'1 and sequence R'2. R'2 is then transmitted along with DMRS sequence R'1.

[0079] FIG. 20 illustrates a schematic diagram of a new PUCCH configuration according to one embodiment of the present disclosure, where information symbols d i is implied by the relationship between sequences R'1 and R'2, and reference signals and UL control information such as ACK / NACK are multiplexed in a staggered manner in the frequency domain.

[0080] As shown in FIG. 20, in this embodiment of the present disclosure, base sequences 1 and 2 have the same length N. The two sequences R1 and R2 may be different or may be transformed, cyclically shifted, or phase-rotated from the same base sequence. Base sequences 1 and 2 may be, for example, the base sequence shown in FIG. 6. However, it should be understood that other base sequences are also possible. PUCCH (e.g., ACK / NACK) bits {0, 1} are first modulated onto PUCCH symbols after constellation mapping, for example, BPSK{+1, −1}. Then, the modulated symbols are implicitly indicated by the relationship between sequences R′1 and R′2. This relationship may be reflected in a cyclic shift, which can be expressed, for example, as follows: R' n =e jαn R n ,0≦n≦11 α=2πk / 12,0≦k≦11 For sequences R'1 and R'2, they can use different cycle shifts, which can be expressed as follows: e j2πk1 / 12 R n’ e j2πk1 / 12 R n where k1 and k2 are R n where k1-k2 is the CS index. When k1-k2=6, the information symbol indicates +1, and when k1-k2=-6, the information symbol indicates -1. In this way, the PUCCH information symbol can be implicitly indicated by the relationship between the sequences R'1 and R'2. In such a case, the total number of REs to imply the PUCCH to be transmitted is 24 (2N).

[0081] The PUCCH mapping and multiplexing is similar to the embodiment as shown in FIG. 9, so reference can be made to FIGS. 10 to 18 for details.

[0082] Figures 21 to 22 further illustrate a further possible solution for DMRS and PUCCH information transmission according to a further embodiment of the present disclosure, in which the sequence is divided into k different groups and the modulated PUCCH symbols are indicated by predefined groups.

[0083] The PUCCH information bits are obtained after constellation mapping. i If the modulation order is M, it is completely 2 M symbols. There are Q sequences that can be used. The Q sequences are grouped into K groups (K=Q / M), where each group kj corresponds to one modulation symbol, as shown in Figure 21. Therefore, different sequence groups are used for different modulation symbols.

[0084] 22 further schematically illustrates a constellation mapping of QPSK according to one embodiment of the present disclosure. As shown in FIG. 22, four sequence groups k1 to k4 are mapped to four NACK / ACK symbols.

[0085] The Q-sequences can be different base sequences, different cyclic shifts of one or more base sequences, or different transformations of one or more base sequences, e.g., phase rotation (R1=e jθ *R2). These sequences can be staggered or continuously mapped in frequency or time domain. The total number of REs for implicitly transmitting PUCCH information is N.

[0086] 23-24 illustrate a specific embodiment of cyclic shift grouping according to one embodiment of the present disclosure. Two different cyclic shift groups are shown in FIG. 23. As shown in FIG. 23, the 12 cyclic shifts are divided into four groups indicated by different patterns. The 12 cyclic shifts can be expressed as follows: R' n =e jαn R n,0≦n≦11 α=2πk / 12,0≦k≦11

[0087] In one possible grouping, cyclic shifts 0 to 2 are grouped as a first group, cyclic shifts 3 to 5 are grouped as a second group, cyclic shifts 6 to 8 are grouped as a third group, and cyclic shifts 9 to 11 are grouped as a fourth group. Figure 24 schematically illustrates an ACK / NACK constellation mapping corresponding to the cyclic shift grouping as illustrated in Figure 21 according to one embodiment of the present disclosure. As shown in Figure 24, the four cyclic shift groups are mapped to QPSK {+1, -1, +j, -j}, respectively.

[0088] Furthermore, Figure 23 shows another possible grouping in which cyclic shifts 0, 4, and 8 are divided into a first group, cyclic shifts 1, 5, and 9 are divided into a second group, cyclic shifts 2, 6, and 10 are divided into a third group, and cyclic shifts 3, 7, and 11 are divided into a fourth group. In addition to the example of possible groupings, it should be understood that the cyclic shifts can be divided in other suitable manners. In this manner, different cyclic shift groups can be used to indicate different PUCCH symbols. Furthermore, different UEs may use different cyclic shifts within a cyclic shift group to indicate their own PUCCH symbols. If the base sequence is 12, the total number of REs for transmitting PUCCH is implicitly 12.

[0089] 25 is a schematic diagram of a new PUCCH structure according to one embodiment of the present disclosure. As shown, the PUCCH information symbols are transformed into R' with a predetermined transformation such as phase rotation (PR) or cyclic shift (CS). n R' is implicitly n are mapped to physical resources and transmitted in UL symbols.

[0090] It should be understood that the PUCCH information can be mapped to L symbols (L>=1), where L can be a predefined value. L can be signaled dynamically or semi-statically by a base station such as an eNB, in which case a bit can be provided in a dynamic control region or an RRC message. Furthermore, the PUCCH resource index can also be predefined or signaled dynamically or semi-statically by the eNB. It should be noted that the sequence and / or mapping order can be different or the same across PRBs or symbols. OCC, phase rotation, etc. can be used across PRBs or symbols.

[0091] Furthermore, the subcarrier spacing of the PUCCH can be different from other symbols. New modulations can also be used. To maintain a low PAPR in one or more symbols, a constant coefficient, such as 8PSK, can be used. Furthermore, the sequence length of the PUCCH can be adapted to different payloads. In one embodiment of the present disclosure, PUCCHs are classified into groups, some of which are modulated with ZC / PN sequences or represented with cyclic shifts, while others are represented with different sequences or are not modulated on a sequence, as shown in Figures 26A and 26B. Typically, important PUCCH information is modulated with a DMRS sequence to obtain accurate results. For example, ACK / NACK is more important than CSI, so it may be modulated on a ZC / PN sequence or represented with a cyclic shift. In contrast, CSI is less important, so it is not modulated on a ZC / PN sequence. The ZC / PN sequence for ACK / NACK can be used as a demodulation RS for CSI, which can provide additional benefits for some PUCCHs without an available reference signal. In some cases, UL control information and reference signals may be transmitted at different time intervals, and in other cases, not all UL control information may be transmitted with a reference signal. However, in either of the two cases, there may be a PUCCH without an available reference signal. In such cases, it is possible to use a previous reference signal, such as the reference signal closest to it. As an alternative, the sequence for the previous control information can also be used, since the received sequence itself carries channel information that can be used as an RS for other PUCCHs. In certain embodiments of the present disclosure, a reference signal for UL control information without an available reference signal can be determined depending on the previous reference signal and the time interval from the previous control information to the UL control information without an available reference signal. That is, if the PUCCH has a shorter time interval from the previous PUCCH than from the previous RS, the sequence for the previous PUCCH can be used as the reference signal for the PUCCH. This allows for more accurate PUCCH information to be obtained. This solution can be used together with any of the PUCCH transmission solutions described above to achieve higher accuracy.

[0092] Figure 27A shows one possible UL region design according to an embodiment of the present disclosure. Assume there are N symbols for the UL, M symbols for UL control (PUCCH), and L symbols for DMRS (L >= 0). In one embodiment of the present disclosure, one or more symbols / PRBs can be modulated with a ZC / PN sequence or a cyclic shift of the ZC / PN sequence. As shown in Figure 27A, for an M-symbol PUCCH, K symbols are modulated on the ZC / PN sequence or a cyclic shift of the ZC / PN sequence (K >= 0). The other M K symbols may be any type of control information. Figure 27B also shows another possible UL region design according to an embodiment of the present disclosure, where there is one symbol for DMRS and one symbol for modulated PUCCH. The DMRS and / or PUCCH symbols can be contiguous or staggered. Note that the positions of the DMRS, PUCCH, and data may differ from those shown in Figures 27A and 27B.

[0093] Furthermore, in an embodiment of the present disclosure, one or more DMRSs can be provided within a window time for demodulation, as shown in Figures 28A to 28C. In one embodiment of the present disclosure, the window time may include multiple subframes as shown in Figure 28A, or multiple symbols as shown in Figure 28B, or may be a combination with the previous solution as shown in Figure 28C. The window time value may be predefined or signaled dynamically / semi-statically.

[0094] The above mainly describes a solution for transmitting UL information. The present disclosure also provides a method for receiving UL information, which will be described with reference to FIG.

[0095] As shown in FIG. 29, method 2900 may begin at step 2910, initially receiving a reference signal transmitted using a first sequence. The first sequence of the reference signal may have a base sequence such as that shown in FIG. 6, may be one of the sequences shown in FIG. 11, or may be another sequence having frequency-domain orthogonality. The first reference signal may be a sequence transformed from the base sequence by cyclic shift, phase rotation, or any other transformation. Furthermore, the reference signal may be, for example, a DMRS signal or another reference signal.

[0096] In step 2920, control information transmitted using a second sequence is received. Similarly, the second sequence of the control information may have a base sequence as shown in FIG. 6, may be one of the sequences in FIG. 11, or may be another sequence having frequency-domain orthogonality. The second reference signal may be a sequence transformed from the base sequence by cyclic shift, phase rotation, or other transformation. The first sequence and the second sequence may be identical or may share the same base sequence. Alternatively, the first sequence and the second sequence may have different base sequences with the same or different lengths. For example, the first sequence may have a base sequence as shown in FIG. 6, while the second sequence may be one of the sequences as shown in FIG. 11. The control information may be PUCCH information such as NACK / ACK, CQI, PMI, RI, etc.

[0097] Next, in step S2930, the control information is demodulated using the reference signal. In particular, the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain. In one embodiment of the present disclosure, demodulating the control information further comprises obtaining the UL control information using channel information together with the second sequence, where the channel information is obtained from the reference signal by using the first sequence. That is, the channel information is first obtained from the reference signal based on the first sequence, and then the control information bits can be obtained by demodulating the received control information based on the channel information and the second sequence.

[0098] In another embodiment of the present disclosure, demodulating the control information comprises obtaining a second sequence using channel information, the channel information being obtained from a reference signal using the first sequence, and obtaining the control information based on a relationship between the first sequence and the second sequence. In such a case, after obtaining the channel information based on the reference signal, the second sequence is further obtained based on the channel information, and then a relationship between the first sequence and the second sequence, which relationship implicitly indicates the control information, is further determined. Thus, in this embodiment, the information bits are transmitted implicitly. In other words, the information bits themselves are not multiplexed with the second sequence, but are implicitly indicated by the first sequence and the second sequence.

[0099] In embodiments of the present disclosure, the reference signals and UL control information may be staggered multiplexed in a number of different ways. For example, the reference signals and UL control information may be staggered multiplexed by one resource element, with one reference signal for each UL control information. Alternatively, the reference signals and UL control information may be staggered multiplexed by two or more resource elements, with one reference signal shared by two or more portions of the UL control information.

[0100] In embodiments of the present disclosure, the UL control information and reference signals may be mapped in any suitable manner. For example, the UL control information and reference signals may be mapped to both edges of the system bandwidth. Additionally or alternatively, the UL control information and reference signals may hop over two symbols.

[0101] In embodiments in which the UL control information and the reference signal are transmitted at different time intervals or not all UL control information is transmitted with a reference signal, one of the previous reference signal and the sequence of previous control information is used as a reference signal for demodulating the UL control information without an available reference signal. In such cases, the method may further comprise determining a reference signal for the UL control information without an available reference signal that depends on the previous reference signal and the time interval from the previous control information to the UL control information.

[0102] Some details about PUCCH design, first sequence, second sequence, staggered multiplexing, resource mapping, etc. have already been described in detail with reference to Figures 8 to 28, so these details will not be detailed here. For the sake of brevity and for those details, please refer to the description with reference to Figures 8 to 28.

[0103] In an embodiment of the present disclosure, uplink information is transmitted in reduced uplink symbols, providing a new solution for UL transmission and reception that can adapt to a reduced subframe configuration where the uplink symbols are reduced, and thus transmission latency can be significantly reduced.

[0104] 30 is a block diagram of an apparatus for transmitting UL information according to an embodiment of the present disclosure. As shown in FIG. 30, the apparatus 3000 includes a reference signal transmitter 3010 and a control information transmitter 3020. The reference signal transmitter 3010 can be configured to transmit a reference signal using a first sequence. The control information transmitter 3020 can be configured to transmit UL control information using a second sequence. In particular, the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

[0105] In one embodiment of the present disclosure, the UL control information is modulated based on the second sequence, meaning that the bits of the UL control information are transmitted implicitly. In another embodiment of the present disclosure, the first sequence and the second sequence can have a predetermined relationship that is used to implicitly indicate the UL control information.

[0106] In an embodiment of the present disclosure, the first sequence and the second sequence are identical or share the same base sequence, or the first sequence and the second sequence can have different base sequences.

[0107] In embodiments of the present disclosure, the reference signals and UL control information may be staggered multiplexed in any suitable manner, such as by using one reference signal for one UL control information and staggering the reference signals and UL control information by one resource element, or by using one reference signal shared by more than one portion of the UL control information and staggering the reference signals and UL control information by more than one resource element.

[0108] In embodiments of the present disclosure, the reference signals and UL control information may be mapped in any suitable manner. In one embodiment of the present disclosure, the UL control information and reference signals are mapped to both ends of the system bandwidth. In another embodiment of the present disclosure, the UL control information and reference signals hop by two symbols.

[0109] In one embodiment of the present disclosure, the UL control information and the reference signal can be transmitted at different time periods. In another embodiment of the present disclosure, not all UL control information is transmitted with a reference signal. In either case, this means that there is some UL control information without an available reference signal. In such a case, one of the previous control signals and one of the control signals of the previous control information can be used as a reference signal for the UL control information without an available reference signal. In one embodiment of the present disclosure, the reference signal for the UL control information without an available reference signal depends on the time interval from the previous reference signal and previous control information to the UL control information without an available reference signal.

[0110] FIG. 31 further shows an apparatus for receiving UL information. As shown in FIG. 31, the apparatus 3100 includes a reference signal receiver 3110, a control information receiver 3120, and a demodulator 3130. The reference signal receiver 3110 may be configured to receive a reference signal transmitted using a first sequence. The control information receiver 3120 may be configured to receive control information transmitted using a second sequence. The demodulator 3130 may be configured to demodulate the control information using the reference signal. In particular, the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

[0111] In one embodiment of the present disclosure, the demodulator 3130 is further configured to obtain UL control information using channel information together with the second sequence, and the channel information is obtained from the reference signal by using the first sequence.

[0112] In another embodiment of the present disclosure, the demodulator 3130 is further configured to obtain a second sequence using channel information obtained from a reference signal using the first sequence, and to obtain control information based on a relationship between the first sequence and the second sequence.

[0113] In one embodiment of the present disclosure, the first sequence and the second sequence may be identical or may share the same base sequence, while in another embodiment of the present disclosure, the first sequence and the second sequence may have different base sequences.

[0114] In one embodiment of the present disclosure, the reference signals and UL control information are multiplexed in a staggered manner by one resource element with one reference signal for one UL control information. In another embodiment of the present disclosure, the reference signals and UL control information are multiplexed in a staggered manner by two or more resource elements with one reference signal shared by two or more portions of the UL control information.

[0115] In one embodiment of the present disclosure, the UL control information and reference signals are mapped to both edges of the system bandwidth. In another embodiment of the present disclosure, the UL control information and reference signals can hop by two symbols.

[0116] In one embodiment of the present disclosure, one of the sequence of the previous reference signal and the subsequent previous control information can be used as a reference signal for demodulating the UL control information without an available reference signal. In such a case, the apparatus 3100 further includes a reference signal determiner 3140 configured to determine a reference signal for the UL control information without an available reference signal depending on a time interval from the previous reference signal to the previous control information. The time interval is the time interval for the UL control information without an available reference signal.

[0117] The devices 3000 and 3100 have been briefly described above with reference to Figures 30 and 31. It should be noted that the devices 3000 and 3100 may be configured to implement the functions as described with reference to Figures 8 to 29. Therefore, for details on the operation of the modules in these devices, reference may be made to the descriptions of the steps of the methods described with reference to Figures 8 to 29.

[0118] Furthermore, it should be noted that the components of the devices 3000 and 3100 may be embodied in hardware, software, firmware, and / or any combination thereof. For example, the components of the devices 3000 and 3100 may each be realized by a circuit, a processor, or any other suitable selection of devices. Those skilled in the art will appreciate that the above examples are for illustrative purposes and not limiting.

[0119] In some embodiments of the present disclosure, the devices 3000 and 3100 may include at least one processor. At least one processor suitable for use in embodiments of the present disclosure may include, for example, both general-purpose and special-purpose processors known or developed in the future. The devices 3000 and 3100 may further include at least one memory. The at least one memory may include, for example, a semiconductor memory device such as RAM, ROM, EPROM, EEPROM, or a flash memory device. The at least one memory may be used to store a program of computer-executable instructions. The program may be written in any high-level and / or low-level, adaptable, or interpretable programming language. According to embodiments, the computer-executable instructions may be configured, using the at least one processor, to cause the devices 3000 and 3100 to perform at least the operations described with reference to each of FIGS. 8 through 29.

[0120] FIG. 32 further shows a simplified block diagram of an apparatus 3210 that may be embodied as or included in a terminal device such as a UE for a wireless network within a wireless network, and apparatus 3220 is a base station such as a NB or eNB as described herein.

[0121] The apparatus 3210 comprises at least one processor 3211, such as a data processor (DP) and at least one memory (MEM) 3212 coupled to the processor 3211. The apparatus 3210 may further comprise a transmitter TX and a receiver RX 3213 coupled to the processor 3211, which may be communicatively connected to and operatively connected to the apparatus 3220. The MEM 3212 stores a program (PROG) 3214. The PROG 3214 may include instructions that, when executed on an associated processor 3211, enable the apparatus 3210 to operate according to embodiments of the present disclosure, for example, to perform the method 800. The combination of the at least one processor 3211 and the at least one MEM 3212 may form a processing means 3215 adapted to implement various embodiments of the present disclosure.

[0122] The device 3220 comprises at least one processor 3221, such as a DP, and at least one MEM 3222 coupled to the processor 3221. The device 3220 may further comprise a suitable TX / RX 3223 coupled to the processor 3221, the TX / RX 3223 operable to wirelessly communicate with the device 3210. The MEM 3222 stores PROG 3224. The PROG 3224 may include instructions, when executed on an associated processor 3221, that enable the device 3220 to operate in accordance with embodiments of the present disclosure, e.g., instructions for performing method 2900. The combination of the at least one processor 3221 and the at least one MEM 3222 may form a processing means 3225 adapted to implement various embodiments of the present disclosure.

[0123] Various embodiments of the present disclosure may be performed by computer programs executable by one or more of the processors 3211, 3221, software, firmware, hardware, or combinations thereof.

[0124] MEMs 3212 and 3222 may be of any type suitable for the local technology environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, and including, but not limited to, memory, and removable memory.

[0125] The processors 3211 and 3321 may be of any type suitable for the local technology environment and may include one or more of a general purpose computer, a special purpose computer, a microprocessor, a digital signal processor DSP and a processor based on a multi-core processor architecture, as non-limiting examples.

[0126] Furthermore, the present disclosure may provide a carrier containing such a computer program, wherein the carrier is one of an electronic signal, an optical signal, a radio signal, or a computer-readable storage medium, including, for example, an optical compact disc or electronic memory devices such as RAM (random access memory), ROM (read only memory), flash memory, magnetic tape, CD-ROM, DVD, Blu-ray disc, etc.

[0127] The techniques described herein may be implemented in a manner that allows an apparatus implementing one or more functions of a corresponding apparatus described in one embodiment to implement the corresponding one or more functions in addition to conventional means, and an apparatus may comprise separate means for each separate function, or means that can be configured to perform two or more functions. For example, these techniques may be implemented in hardware (one or more devices), firmware (one or more devices), software (one or more modules), or a combination thereof. In the case of firmware or software, implementation may be via modules (e.g., procedures, functions, etc.) that perform the functions described herein.

[0128] The exemplary embodiments herein have been described above with reference to block diagrams and flowchart illustrations of methods and apparatuses. It will be understood that each block of the block diagrams and flowchart illustrations, and combinations of blocks in the block diagrams and flowchart illustrations, respectively, can be implemented by various means, including computer program instructions. These computer program instructions are loaded into a general-purpose computer, special-purpose computer, or other programmable data processing apparatus such that the instructions, which execute on the computer or other programmable data processing apparatus, create means for performing the specified functions within one or more blocks of the flowchart.

[0129] While the specification contains many specific implementation details, these should not be construed as limiting the scope of the implementation or the scope of what can be claimed, but rather as a description of features specific to particular embodiments of a particular implementation. Certain features described herein in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable subcombination. Furthermore, even if features are described above as acting in a particular combination and are initially claimed as such, in some cases one or more features from the claimed combination may be separated from the combination or include variations of the subcombination.

[0130] It will be obvious to those skilled in the art that, as technology advances, the concept of the present invention can be implemented in various ways. The above-described embodiments are given to illustrate, not limit, the present disclosure, and it should be understood that modifications and variations are possible without departing from the spirit and scope of the present disclosure, as those skilled in the art will easily understand. Such modifications and variations are considered to be within the scope of the disclosure and the appended claims. The protective scope of the present disclosure is defined by the appended claims.

Claims

1. A base station, means for transmitting, to a UE (User Equipment), by RRC (Radio Resource Control) signaling, a parameter indicating the number of symbols to which a first type PUCCH (Physical Uplink Control Channel) is mapped; means for receiving the first type PUCCH from the UE using a first sequence; The first sequence is e ｊαｎ R(n) (where 0≦n≦11), R(n) is the base sequence, α is defined as α=2πk / 12 (where 0≦k≦11), The value of k corresponds to the value of a pair of two HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgement) information bits, Each of the HARQ-ACK information bits is either 0 indicating a NACK (Negative Acknowledgement) or 1 indicating an ACK (Acknowledgement); The value of the two-bit pair of the HARQ-ACK information bits is either 00, 01, 10, or 11. Base station.

2. means for interpreting at least one of the NACK or the ACK from the first sequence from four sets of two-bit pair values ​​of the HARQ-ACK information bits; The base station of claim 1 .

3. The base sequence is R(n)=e ｊφ（ｎ）π／４ is defined as The value of φ(n) varies between −1, 1, −3, or 3 depending on the value of n. The base station of claim 1 .

4. the first sequence is mapped to resource elements without being multiplied by symbols modulated from the HARQ-ACK information bits; The base station of claim 1 .

5. The first type PUCCH is received without being frequency-division multiplexed with a Demodulation Reference Signal (DMRS), The base station of claim 1 .

6. The first type PUCCH is received without being time-division multiplexed with the DMRS. The base station of claim 5.

7. The value of k is one of {0, 1, 2} based on a first set of four sets of two-bit pair values ​​of the HARQ-ACK information bit; the value of k being one of {3, 4, 5} based on the second of the four sets; the value of k being one of {6, 7, 8} based on the third set of the four sets; The value of k is one of {9, 10, 11} based on the fourth set of the four sets. The base station of claim 1 .

8. a first value of k based on the value of the pair of two bits of the HARQ-ACK information bits indicated by two bits 00; The difference between the second value of k and the value of the pair of two bits of the HARQ-ACK information bits indicated by two bits different from 00 is: is a multiple of 3, The base station of claim 1 .

9. a value of k based on the value of the two-bit pair of HARQ-ACK information bits is UE-specific for one symbol in the time domain; A base station according to any one of claims 1 to 8.

10. The first type PUCCH is received with a time length of one symbol. A base station according to any one of claims 1 to 9.

11. The α is a cyclic shift. The base station of claim 1 .

12. A UE (User Equipment), means for receiving, from a base station, a parameter indicating the number of symbols to which a first type PUCCH (Physical Uplink Control Channel) is mapped by RRC (Radio Resource Control) signaling; means for transmitting the first type PUCCH to the base station using a first sequence; The first sequence is e ｊαｎ R(n) (where 0≦n≦11), R(n) is the base sequence, α is defined as α=2πk / 12 (where 0≦k≦11), The value of k corresponds to the value of a pair of two HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgement) information bits, Each of the HARQ-ACK information bits is either 0 indicating a NACK (Negative Acknowledgement) or 1 indicating an ACK (Acknowledgement); The value of the two-bit pair of the HARQ-ACK information bits is either 00, 01, 10, or 11. UE.

13. The base sequence is R(n)=e ｊφ（ｎ）π／４ is defined as The value of φ(n) varies between −1, 1, −3, or 3 depending on the value of n.

13. The UE of claim 12.

14. the first sequence is mapped to resource elements without being multiplied by symbols modulated from the HARQ-ACK information bits; 13. The UE of claim 12.

15. The first type PUCCH is transmitted without being frequency-division multiplexed with a Demodulation Reference Signal (DMRS), 13. The UE of claim 12.

16. The first type PUCCH is transmitted without being time-division multiplexed with the DMRS.

16. The UE of claim 15.

17. The value of k is one of {0, 1, 2} based on a first set of four sets of two-bit pair values ​​of the HARQ-ACK information bit; the value of k being one of {3, 4, 5} based on the second of the four sets; the value of k being one of {6, 7, 8} based on the third set of the four sets; The value of k is one of {9, 10, 11} based on the fourth set of the four sets.

13. The UE of claim 12.

18. a first value of k based on the value of the pair of two bits of the HARQ-ACK information bits indicated by two bits 00; The difference between the value of the HARQ-ACK information bit indicated by two bits different from 00 and the second value of k based on the value of the pair of two bits is: is a multiple of 3, 13. The UE of claim 12.

19. a value of k based on the value of the two-bit pair of HARQ-ACK information bits is UE-specific for one symbol in the time domain; 13. The UE of claim 12.

20. The first type PUCCH is transmitted with a time length of one symbol.

13. The UE of claim 12.

21. The α is a cyclic shift.

13. The UE of claim 12.

22. 1. A method performed by a base station, comprising: Transmitting a parameter indicating the number of symbols to which a first type PUCCH (Physical Uplink Control Channel) is mapped to a UE (User Equipment) by RRC (Radio Resource Control) signaling; receiving the first type PUCCH from the UE using a first sequence; The first sequence is e ｊαｎ R(n) (where 0≦n≦11), R(n) is the base sequence, α is defined as α=2πk / 12 (where 0≦k≦11), The value of k corresponds to the value of a pair of two HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgement) information bits, Each of the HARQ-ACK information bits is either 0 indicating a NACK (Negative Acknowledgement) or 1 indicating an ACK (Acknowledgement); The value of the two-bit pair of the HARQ-ACK information bits is either 00, 01, 10, or 11. method.

23. A method performed by a UE (User Equipment), comprising: receiving, from a base station by RRC (Radio Resource Control) signaling, a parameter indicating the number of symbols to which a first type PUCCH (Physical Uplink Control Channel) is mapped; Transmitting the first type PUCCH to the base station using a first sequence; The first sequence is e ｊαｎ R(n) (where 0≦n≦11), R(n) is the base sequence, α is defined as α=2πk / 12 (where 0≦k≦11), The value of k corresponds to the value of a pair of two HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgement) information bits, Each of the HARQ-ACK information bits is either 0 indicating a NACK (Negative Acknowledgement) or 1 indicating an ACK (Acknowledgement); The value of the two-bit pair of the HARQ-ACK information bits is either 00, 01, 10, or 11. method.

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