JP7290188B2 - Method performed by base station, method performed by UE, base station and UE - Google Patents

Description

TECHNICAL FIELD Embodiments of the present disclosure relate generally to wireless communication technologies, and more particularly to methods and apparatus for transmitting uplink (UL) information and methods and apparatus for receiving UL information.

In existing wireless communications, a subframe comprises two slots each containing seven symbols. As shown in FIG. 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, and so on. PUCCH is a UL channel that carries uplink control information, eg, ACK/NACK, channel quality indicator (CQI), precoding matrix indicator (PMI), (rank indicator) RI, and so on. As shown in FIG. 1, three intermediate symbols are used to transmit DMRS and the other symbols are used to transmit PUCCH symbols.

Usually, after a symbol is transmitted, ACK/NACK is received on PUCCH before 4 more symbols are transmitted, which means substantial latency. To reduce latency, it is proposed to reduce the number of UL symbols. For future fifth generation (5G) communications, frame structures with only one or more symbols have been proposed for latency reduction, which means that for UL transmission there are either one symbol or multiple symbols. means that For illustration purposes, FIG. 2 shows one of the possible new subframe configurations, with only one symbol for UL transmission. However, it should be appreciated that in other possible new subframe configurations, the symbols may be placed in different positions and/or may comprise multiple UL symbols.

Therefore, new PUCCH channel configurations and new UL information transmission solutions are required to accommodate frame structures with reduced UL symbols.

In the present disclosure, new solutions for UL information transmission and reception are provided that alleviate or at least mitigate some of the problems of the prior art.

According to a first aspect of the present disclosure, a method of transmitting UL information is provided. The method comprises 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: , are staggered and multiplexed in the frequency domain.

In a second aspect of the present disclosure, a method of receiving UL information is provided. The method comprises: receiving a reference signal transmitted using a first sequence; receiving control information transmitted using a second sequence; and demodulating control information, wherein the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

A third aspect of the present disclosure also provides an apparatus for transmitting UL information. The apparatus comprises 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. and , wherein the reference signal and the UL control information are alternately shifted in the frequency domain and multiplexed.

In a fourth aspect of the disclosure, an apparatus for receiving UL information is provided. The apparatus is configured to receive a reference signal receiver configured to receive a reference signal transmitted using a first sequence and a 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 staggered in the frequency domain. are multiplexed.

According to a fifth aspect of the present disclosure, there is provided a computer readable storage medium embodied with computer program code, the computer program code, when executed, performing the steps of any of the first aspects. In the above method according to an embodiment, the device is configured to cause an action to be performed.

According to a sixth aspect of the present disclosure, there is provided a computer readable storage medium embodied with computer program code, wherein the computer program code, when executed, The method according to the embodiment of , configured to cause an apparatus to perform an action.

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.

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

Embodiments of the present disclosure provide a new solution for UL transmission and reception, in which the uplink information is adapted to a subframe configuration of reduced uplink symbols, reduced uplink It can be transmitted in symbols, thus significantly reducing the transmission latency.

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

FIG. 1 schematically shows UL symbols within an existing subframe structure.

FIG. 2 schematically shows one of the possible UL symbols in the newly proposed subframe structure with reduced UL symbols.

FIG. 3 schematically shows PUCCH patterns in existing communication systems.

FIG. 4 schematically shows HARQ ACK/NACK constellation mapping.

FIG. 5 schematically illustrates UL information transmission in existing PUCCH format 1a/1b.

FIG. 6 schematically shows the basic sequence of UL symbols.

FIG. 7 schematically illustrates UL information transmission in existing PUCCH format 2a/2b.

FIG. 8 schematically shows a flowchart of a method for transmitting UL information according to one embodiment of the disclosure.

FIG. 9 shows a schematic diagram of DMRS and PUCCH information transmission according to one embodiment of the present disclosure.

FIG. 10 schematically shows an example of a new PUCCH structure according to one embodiment of the present disclosure.

FIG. 11 schematically shows another base sequence that may be used for DMRS and PUCCH information according to one embodiment of the present disclosure.

FIG. 12 schematically shows another new PUCCH structure according to another embodiment of the disclosure.

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

FIG. 14A schematically illustrates an example PUCCH and DMRS multiplexing scheme according to one embodiment of the present disclosure. FIG. 14B schematically illustrates an example PUCCH and DMRS multiplexing scheme according to one embodiment of the present disclosure. FIG. 14C schematically illustrates an example PUCCH and DMRS multiplexing scheme according to one embodiment of the present disclosure. FIG. 14D schematically illustrates an example PUCCH and DMRS multiplexing scheme according to one embodiment of the present disclosure. FIG. 14E schematically illustrates an example PUCCH and DMRS multiplexing scheme according to one embodiment of the present disclosure.

FIG. 15A schematically illustrates an example resource mapping method according to embodiments of the present disclosure. FIG. 15B schematically illustrates an example resource mapping method according to embodiments of the present disclosure. FIG. 15C schematically illustrates an example resource mapping method according to embodiments of the present disclosure. FIG. 15D schematically illustrates an example resource mapping method according to embodiments of the present disclosure. FIG. 15E schematically illustrates an example resource mapping method according to embodiments of the present disclosure. FIG. 15F schematically illustrates an example resource mapping method according to embodiments of the present disclosure.

FIG. 16A schematically illustrates an example PUCCH and DMRS multiplexing scheme according to one embodiment of the present disclosure. FIG. 16B schematically illustrates an example of a multiplexing scheme for PUCCH and DMRS according to one embodiment of the present disclosure. FIG. 16C schematically illustrates an example PUCCH and DMRS multiplexing scheme according to one embodiment of the present disclosure. FIG. 16D schematically illustrates an example PUCCH and DMRS multiplexing scheme according to one embodiment of the present disclosure.

FIG. 17A schematically illustrates an example resource mapping method according to one embodiment of the present disclosure. FIG. 17B schematically illustrates an example resource mapping method according to one embodiment of the present disclosure. FIG. 17C schematically illustrates an example resource mapping method according to one embodiment of the present disclosure. FIG. 17D schematically illustrates an example resource mapping method according to one embodiment of the present disclosure.

FIG. 18A schematically illustrates an example resource mapping method for common representations according to one embodiment of the present disclosure. FIG. 18B schematically illustrates an example resource mapping method for common representations according to one embodiment of the present disclosure. FIG. 18C schematically illustrates an example resource mapping method for common representations according to one embodiment of the present disclosure. FIG. 18D schematically illustrates an example resource mapping method for common representations according to one embodiment of the present disclosure.

FIG. 19 schematically shows a block diagram of DMRS and PUCCH information transmission according to another embodiment of the disclosure.

FIG. 20 schematically shows a new PUCCH structure according to another embodiment of the present disclosure.

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

FIG. 22 schematically illustrates constellation mapping according to one embodiment of the present disclosure;

FIG. 23 schematically illustrates cyclic shift grouping according to one embodiment of the present disclosure.

FIG. 24 schematically illustrates an ACH/NACK constellation mapping for one of the exemplary cyclic shift groupings shown in FIG. 21, according to one embodiment of the present disclosure;

Figure 25 schematically shows a further PUCCH structure according to a further embodiment of the disclosure.

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

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

FIG. 28A schematically illustrates another DMRS window design according to another embodiment of the disclosure. FIG. 28B schematically illustrates another DMRS window design according to another embodiment of the disclosure. FIG. 28C schematically illustrates another DMRS window design according to another embodiment of the disclosure.

FIG. 29 schematically illustrates a flowchart of a method for receiving UL information according to one embodiment of the disclosure.

FIG. 30 schematically shows a block diagram of an apparatus for transmitting UL information according to one embodiment of the disclosure.

FIG. 31 schematically shows a block diagram of an apparatus for receiving UL information according to one embodiment of the present disclosure;

FIG. 32 further illustrates apparatus 3310, which may be embodied as or included in a UE; apparatus 3320, which may be embodied as or included in a base station of the wireless networks described herein; 1 shows a simplified block diagram of the .

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 presented 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.

In the accompanying drawings, various embodiments of the disclosure are illustrated in block diagrams, flowcharts, and other figures. Each block within the flowchart or blocks may represent a module, program, or portion of code that includes one or more executable instructions for performing the specified logical function, and is referred to in this disclosure as dispensable Blocks are indicated by dotted lines. Moreover, although these blocks are shown in a particular sequence for performing the steps of the method, in practice they need not be performed strictly according to the illustrated sequence. For example, they may be performed in reverse order or concurrently depending on the nature of their respective operations. The block diagrams of the flowcharts and/or each block and combinations thereof may be implemented by dedicated hardware-based systems, or by a combination of dedicated hardware and computer instructions, to perform the specified functions/acts. Also note that

Generally, terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. References to "a/an/the/said 'element, device, component, means, step, etc.'" refer to a plurality of such devices, components, means, units, unless expressly stated otherwise. shall be construed openly as any reference to an instance of at least one element, device, component, means, unit step, etc., without excluding steps, etc. Also, as used herein, the indefinite article "a/an" does not exclude a plurality of such steps, units, modules, devices, objects, and the like.

Additionally, in the context of this disclosure, User Equipment (UE) refers to terminals, mobile terminals (MT), subscriber stations (SS), portable subscriber stations (PSS). ), Mobile Station (MS), or Access Terminal (AT), where some or all functions of a UE, terminal, MT, SS, PSS, MS, or AT can be included. Further, in the context of this disclosure, the term "BS" may be used to refer to, for example, Node B (NodeB or NB), Evolved Node B (eNodeB or eNB), Radio Header (RH), Remote Radio Head (RRH) Head), relays, or low power nodes such as femto, pico, etc.

As mentioned above, in existing subframes, all seven symbols in a slot can be used as UL symbols. In the following, PUCCH patterns in existing communications will be described with reference to FIGS. 3 to 7 for a better understanding of the present disclosure.

Reference is first made to FIG. 3 which shows in more detail the PUCCH pattern in an existing communication system. FIG. 3 shows UL subframe k and UL subframe k+8, specifically in each subframe, the PUCCH is transmitted at the edge of the system bandwidth and hops in two slots.

In existing communication, formats for PUCCH comprise format 1a/1b and format 2a/2b, where format 1a/1b is used to transmit 1-bit or 2-bit ACK/NACK, format 2a/2b are used to transmit uplink CQI and 1-bit or 2-bit ACK/NACK. Generally, PUCCH bits, such as ACK/NACK bits, are modulated into ACK/NACK symbols through constellation mapping. Different constellation mappings are used for different modulation techniques. FIG. 4 schematically shows different constellation mappings for HARQ ACK/NACK. As shown in FIGS. 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 Key), (ACK/NACK)=11, (ACK/NACK)=00, (ACK/NACK)=10, (ACK/NACK)=01 are mapped to +1, −1, +j, −j, respectively.

FIG. 5 schematically illustrates UL information transmission in existing PUCCH format 1a/1b. As shown in FIG. 5, after being modulated into ACK/NACK symbols through constellation mapping, the ACK/NACK symbols are multiplied with a length-12 base sequence. A basic sequence is shown in FIG. The base sequence is shifted by using different cycle shifts and then multiplied with the OCC sequence as shown in FIG. The resulting signals are 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 base sequence shifted using different cycle shifts is multiplied with the OCC sequence, and the resulting signal is processed by IFFT, thereby forming DM-RS symbols. In other words, DMRS and PUCCH formation are substantially similar, except that the _d0 of the NACK symbol is not multiplied with the DM-RS symbol.

FIG. 7 schematically shows a PUCCH pattern in existing PUCCH format 2a/2b. The PUCCH pattern in FIG. 7 does not use the OCC sequence, the coded CSI bits (10 bits) after QPSK modulation are converted into five data d0 to d5 through serial-parallel processing, and the PUCCH symbol and the DMRS symbol. is similar to that shown in FIG. 5, except that has different positions.

As mentioned above, when using reduced UL symbols, the existing PUCCH pattern cannot be used, so the present invention provides a new PUCCH design and a new UL control information transmission and reception solution, which is shown in FIG. Description will be made with reference to FIGS.

FIG. 8 schematically shows a flowchart of a method for transmitting UL information according to one embodiment of the disclosure. As shown in FIG. 8, first, in step 810, a first sequence is used to transmit a reference signal, and in step 820, a second sequence is used to transmit UL control information, in particular the reference signal and the UL Control information is alternately shifted in the frequency domain and multiplexed.

To better understand the present disclosure, FIG. 9 further shows a diagram of DMRS and PUCCH information transmission according to one embodiment of the present disclosure. As shown in FIG. 9, for DMRS, a base sequence 1 of length N is first transformed into R′ ₁ through transformations such as cyclic shift or phase rotation, and then mapped onto physical resources. At the same time, PUCCH information bits are first mapped to information symbols via either constellation mapping as shown in FIG. The information symbols d _i are then further multiplied from the base sequence 2 of length M, for example by a cyclically shifted sequence R′ ₂ . The resulting Y is then mapped to a physical resource.

PUCCH information is transmitted with DMRS. When mapping to resources, the reference signal and UL control information are staggered and multiplexed in the frequency domain as shown in FIG. 10, which shows an exemplary new PUCCH configuration according to one embodiment of the present disclosure. As shown in FIG. 10, PUCCH and DMRS share the same basic sequence of length 12, eg, as shown in FIG. To obtain PUCCH symbol _d0 , the PUCCH (eg, ACK/NACK) bits {0,1} are first modulated onto the PUCCH symbol after constellation mapping. Constellation mapping may be performed according to what is shown in FIG. The PUCCH symbols are then modulated on the base sequence that is also used for DMRS. A PUCCH symbol Y _n modulated on the base sequence can be expressed as follows.
_Yn = _d0.Rn , _n =0, 1, . . . , 11

where _Yn denotes the resulting symbol after modulation, _d0 denotes the PUCCH symbol after constellation mapping, and _Rn denotes the base sequence. Therefore, for PUCCH, the total number of resource elements is 24.

FIG. 11 schematically shows another base sequence that may be used for DMRS and PUCCH information according to one embodiment of the present disclosure. The orthogonal sequence R _n (i) can be based on the OCC/DFT sequence, which has a length of 6 and there are 6 orthogonal sequences with indices ranging from 0 to 5. Therefore, it is clear that the sequences of DMRS and PUCCH are not limited to those shown in FIG. 6 or FIG. 11, and in practice any suitable sequence can be used as long as frequency orthogonality is guaranteed. can do.

FIG. 12 shows another new PUCCH structure according to another embodiment of the present disclosure, used with the base sequence as shown in FIG. As shown in FIG. 12, PUCCH and DMRS also share the same basic sequence, but the length of the basic sequence is 6, for example, as shown in FIG. Similarly, to obtain PUCCH symbol _d0 , the PUCCH (eg, ACK/NACK) bits {0,1} are first modulated onto the PUCCH symbol after constellation mapping. Constellation mapping can also be performed according to what is shown in FIG. The PUCCH symbols are then modulated over the length-6 base sequence. A PUCCH symbol Y _n modulated on the base sequence can be expressed as follows.
_Yn = _d0.Rn (i), i=0 _, 1, . . . , 5
where Y _n denotes the resulting symbol after modulation, d ₀ denotes the PUCCH symbol after constellation mapping, and R _n (i) denotes the sequence with index i, as shown in FIG.

PUCCH symbols are transmitted together with DMRS and multiplexed in a staggered manner in the frequency domain, as shown in FIG. Therefore, for such PUCCH, the total number of resource elements is twelve.

In a further embodiment of the present disclosure, DMRS uses base sequences of length 12, eg, as shown in FIG. PUCCH, on the other hand, uses a different sequence, eg as shown in FIG. Figure 13 schematically shows a further new PUCCH configuration according to a further embodiment of the present disclosure, which can be used in this embodiment where different length sequences are used. In such a case, the PUCCH symbol _Yn modulated on the base sequence can be expressed as follows.
Y _n =d ₀ ·S(i), i=0,1, . . . , 5
where Y _n denotes the resulting symbol after modulation, d ₀ denotes the PUCCH symbol after constellation mapping, and S(i) denotes the base sequence of PUCCH with index i, as shown in FIG. . For such PUCCH, two PUCCH symbols are transmitted with DMRS and thereby staggered and multiplexed, the total number of resource elements being 24.

Thus, in FIG. 9, the two basic sequences R ₁ and R ₂ shown in the figure may be the same sequence. For example, PUCCH may use base sequences for DMRS, as shown in FIG. 6 and FIG. Also, base sequence _R1 and base sequence _R2 can share a base sequence. Alternatively, the two base sequences may be different. For example, base sequence _R2 may be a different root sequence of base sequence _R1 . Also, the two base sequences R ₁ and R ₂ can have the same length, ie M=N, or they can have different lengths, ie M≠N. The sequence R′ ₁ (first sequence) for DMRS is the same as the base sequence R ₁ , or the sequence R′ ₁ can be transformed from the base sequence R ₁ through cyclic shift or phase rotation. The sequence _R'2 (second sequence) for modulating the PUCCH symbols is the same as the base sequence _R2 , or the sequence _R'1 is transformed from the base sequence _R1 through cyclic shift or phase rotation. can be done.

In embodiments of the present disclosure, PUCCH and RS may be staggered multiplexed in many different ways. For illustration purposes, FIGS. 14A-14E show some exemplary multiplexing schemes in the frequency domain. As shown in FIG. 14A, RS and PUCCH can be staggered and multiplexed per RE, ie one RS to one PUCCH. In FIG. 14B, RS and PUCCH can be staggered and multiplexed every k REs, i.e. one RS is for k PUCCHs and c _i and d _m are the same UE or modulation symbols that can come from different UEs. Figure 14C shows another example of a multiplexing method similar to Figure 14B, but in Figure 14C the PUCCH is separated by DMRS instead of being continuous in frequency. FIG. 14D further shows a further exemplary multiplexing method, in which RS and PUCCH use different length sequences, and one PUCCH uses one RS. FIG. 14E shows further exemplary multiplexing schemes according to further embodiments of the present disclosure. In FIG. 14E, PUCCH is not separated by DMRS and is continuous in frequency, which means DMRS is also continuous in frequency.

In the following, for illustration purposes, a common representation of one UL symbol transmission is given, where d _mn (m>=0, n>=0) denote 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 can have different phase rotations, for example.
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 the other has descending order, as shown below.
d ₀₀ =d _1n , d ₀₁ =d _1n−1 , . . . _d0n = _d10
Also, the symbols may be completely different.

For RS sequences R _mn (m>=0, n>=0), the sequences are also the same for a given m or n. In another embodiment of the present disclosure, the RS sequences _Rmn can differ for a given m or n. Furthermore, the symbols may be based on the same base sequence and may have different phase rotation or cycle shift values.

15A-15F schematically illustrate exemplary resource mapping methods according to embodiments of the present disclosure. As shown in FIG. 15A, both the DMRS sequence based sequence and the modulated PUCCH are mapped in order, for example. 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 sequences are R ₀₀ , R ₀₁ . . . R _0n , R ₁₀ , R ₁₁ , . . . R _1n , . . . d _m0 , d _m1 , . . . d _mn order. On the other hand, in FIG. 15B, the sequence-based DMRS sequence and modulated PUCCH are mapped from the edge of the band.

In embodiments of the present disclosure, PUCCH with DMRS may be placed on physical resource blocks (PRBs) in a predetermined order within predefined RBs. For example, different PUCCH symbols can be placed in different PRBs, as shown in FIG. 15C. PUCCH symbols can be mapped to both edges of the system band for frequency diversity, as shown in FIG. 15D. In FIG. 15D, DMRS R ₀ and PUCCH d ₀ *R′ ₁ are mapped to the first edge of the system band. DMRS R ₁ and PUCCH d ₁ *R' ₁ are mapped to the second edge of the system band, DMRS R ₂ and PUCCH d ₂ *R' ₂ are mapped to the first edge of the remaining system band, DMRS R ₃ and PUCCH d ₃ *R' ₃ are mapped to the second edge of the rest of the system, and so on.

In another embodiment of the present disclosure, PUCCH and DMRS duplicates may be placed on the PRB. For example, as shown in FIG. 15E, DMRS R ₀₀ , R ₁₀ , to R _m0 and PUCCH d ₀ *R′ ₀₀ , d ₁ *R′ ₁₀ to d _m *R′ _m0 are first in the first band of the system band. DMRS R ₀₁ , R ₁₁ to R _m1 and PUCCH d ₀ *R′ ₀₁ , d ₁ *R′ ₁₁ to d _m *R′ _m1 are then mapped onto the edge from the second opposite edge of the system band. mapped, and so on. Moreover, FIG. 15F also shows another resource mapping scheme, DMRS R ₀₀ , R ₁₀ to R _m0 and PUCCH d ₀ *R′ ₀₀ , d ₁ *R′ ₁₀ to d _m *R′ _m0 are similar to FIG. 15E , are mapped first from the first edge of the system band, DMRS R _m1 , R _m−11 to R ₀₁ and PUCCH d ₀ *R′ ₀₁ , d ₁ *R′ _m−1 to d _m *R′ ₀₁ are then mapped from the second opposite edge of the system band, in a different order than in FIG. 15E, and so on. In addition, PUCCH duplicates in different PRBSs can also be placed on PRBs, as shown in FIG. 15A or FIG. 15B.

It should also be noted that the mapping order (eg, hopping) can change in a predefined order in different symbols/subframes/PRBs.

Above, the present disclosure is primarily described with reference to one UL symbol design. In fact, it can also be used in a frame design of L UL symbols. This means that a subframe can have reduced UL symbols, but the number of UL symbols is greater than one.

For each of the L UL symbols, the PUCCH and DMRS can be staggered and multiplexed in the same manner, eg, as shown in FIG. 16A. Alternatively, there may be hopping between two symbols, as shown in FIG. 16B. Furthermore, for M (1=<M<=L) symbols in L symbols, the PUCCH and RS sequences may be multiplexed with the frequency staggered for each RE by one or more. Yes, and other (LK) symbols can be used for PUCCH, as shown in FIG. 16C.

In another embodiment of the present disclosure, the PUCCH and RS sequences may be multiplexed staggered in time. In other words, M (1<=M<=L) symbols can be used for RS (which can be consecutive or staggered) and the rest for PUCCH as shown in FIG. 16D. can be used for

Figures 17A and 17B show the mapping of PUCCH and RS in 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, the PUCCH and DMRS are time multiplexed and placed on the PRBs in a predetermined order. For example, PUCCH with DMRS can be mapped sequentially as shown in FIG. 17A or mapped from both edges of the system band as shown in FIG. 17C. In addition, duplication of PUCCH with DMRS can also be placed in PRBs. As another alternative, the PUCCH and DMRS can hop within symbols as shown in FIGS. 17B and 17D. Additionally, for illustrative purposes only, FIGS. 18A-18D show the mapping of PUCCH and DMRS in sequence and from the edge of the system band for common representation.

FIG. 19 schematically shows a block diagram of DMRS and PUCCH information transmission according to another embodiment of the disclosure. In embodiments of the present disclosure, the PUCCH information symbols are not modulated based on the second sequence, 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 transformations such as cyclic shift or phase rotation, and then mapped onto physical resources. At the same time, PUCCH information bits are first mapped to information symbols through either constellation mapping as shown in FIG. The sequence R′ ₂ is transformed from, eg, cyclically shifted or phase rotated from, the M-length base sequence 2 . The resulting sequence _R'2 is then mapped onto physical resources. In this solution, the information symbols d _i are not further multiplied with the sequence _R'2 similar to FIG. Instead, the information symbols d _i are implied by the relationship between the sequences _R'1 and _R'2 . _R'2 is then transmitted with the DMRS sequence _R'1 .

FIG. 20 schematically illustrates a new PUCCH configuration according to one embodiment of the present disclosure, where information symbols d _i are implicitly indicated by the relationship between sequence _R′1 and sequence _R′2 , and reference signal and UL control information such as ACK/NACK is alternately shifted and multiplexed in the frequency domain.

As shown in FIG. 20, in this embodiment of the disclosure, base sequences 1 and 2 have the same length N. The two sequences R ₁ and R ₂ may be different, transformed, cyclically shifted or phase rotated from the same base sequence. Basic sequences 1 and 2 may be, for example, basic sequences as shown in FIG. However, it should be understood that other base sequences are possible. PUCCH (eg, ACK/NACK) bits {0, 1} are first modulated into PUCCH symbols, eg, BPSK {+1, -1}, after constellation mapping. The modulated symbols are then implied by the relationship between the sequences _R'1 and _R'2 . This relationship may be reflected, for example, in a cyclic shift that can be expressed as:
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 represented by the following equations.
e ^j2πk1/12 R _n′ e ^j2πk1/12 R _n
where k1 and k2 are the CS indices of _Rn . The case of k1-k2=6 indicates that the information symbol is +1, and the case of k1-k2=-6 indicates that the information symbol is -1. In this way, the PUCCH information symbols can be implicitly indicated by the relationship between the sequences _R'1 and _R'2 . In such case, the total number of REs to imply PUCCH to transmit is 24 (2N).

PUCCH mapping and multiplexing are similar to the embodiment as shown in FIG. 9, so reference can be made to FIGS. 10-18 for details.

Figures 21-22 further illustrate further possible solutions for DMRS and PUCCH information transmission, according to further embodiments of the present disclosure, where the sequence is divided into k different groups and the modulated PUCCH symbols are predefined indicated by the marked group.

The PUCCH information bits are denoted by d _i obtained after constellation mapping. If the modulation order is M, it will be completely 2 ^M symbols. There are Q-sequences that can be used. The Q-sequences are grouped into K groups (K=Q/M), with each group kj corresponding to one modulation symbol, as shown in FIG. Therefore, different sequence groups are used for different modulation symbols.

FIG. 22 further schematically illustrates constellation mapping for 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.

The Q-sequences are through different base sequences, different cyclic shifts of one or more base sequences, or different transformations of one or more base sequences, such as phase rotations (R ₁ =e ^jθ *R ₂ ). good. These sequences can be staggered or continuously mapped in the frequency or time domain. The total number of REs for implicitly transmitting PUCCH information is N.

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. As shown in FIG. 23, the 12 cyclic shifts are divided into 4 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

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

Further, FIG. 23 shows that cyclic shifts 0, 4, 8 are divided into a first group, cyclic shifts 1, 5, 9 are divided into a second group, and cyclic shifts 2, 6, 10 are divided into a third group. , and cyclic shifts 3, 7 to 11 are divided into a fourth group. In addition to possible grouping examples, it should be appreciated that the cyclic shifts can be divided in other suitable ways. In this way, different cyclic shift groups can be used to indicate different PUCCH symbols. Furthermore, different UEs may use different cyclic shifts within the cyclic shift group to indicate their PUCCH symbols. If the base sequence is 12, the total number of REs for implicit PUCCH transmission is 12.

Figure 25 schematically illustrates a new PUCCH configuration according to one embodiment of the present disclosure. As shown, the PUCCH information symbols are implicit by _R'n with a predetermined transformation such as phase rotation (PR) or cyclic shift (CS). _R'n are mapped to physical resources and transmitted in UL symbols.

It should be appreciated that the PUCCH information can be mapped to L symbols (L>=1), where L can be a predefined value. L may be signaled dynamically or semi-statically by a base station such as an eNB, and in such cases a bit may be provided in the dynamic control region or RRC message. Additionally, the PUCCH resource index may be predefined by the eNB or signaled dynamically or semi-statically. Note that the sequence and/or mapping order may be different or the same in PRBs or symbols. OCC, phase rotation, etc. can be used with PRBs or symbols.

Furthermore, the subcarrier spacing of PUCCH can be different from other symbols. New modulations can also be used. A constant factor, such as 8PSK, can be used to maintain a low PAPR on one or more symbols. Furthermore, the PUCCH sequence length can be adapted to different payloads.
In one embodiment of the present disclosure, the PUCCH is grouped into groups, some modulated with ZC/PN sequences or represented by cyclic shifts, others represented by different sequences, or 26B is not modulated on the sequence. Important PUCCH information is usually 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 not modulated with the ZC/PN sequence, as it is of lesser importance. The ZC/PN sequences for ACK/NACK can be used as demodulation RSs for CSI, which can obtain some additional benefits of PUCCH without reference signals available. In some cases, the UL control information and the reference signal may be transmitted at different time intervals, and in other cases not all UL control information may be transmitted with the 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 the previous reference signal, eg the closest reference signal to it. Alternatively, the received sequence itself carries channel information that can be used as RSs for other PUCCHs, so the sequence for the previous control information can be used. In certain embodiments of the present disclosure, the reference signal for UL control information without available reference signal is changed from previous reference signal and previous control information to UL control information without available reference signal. It can be determined depending on the time interval. 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 makes it possible to obtain highly accurate PUCCH information. This solution can be used with any of the PUCCH transmission solutions as described above to achieve higher accuracy.

FIG. 27A shows one possible UL region design according to embodiments of the present disclosure. Assume that there are N symbols for 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 may be modulated with a ZC/PN sequence or modulated with a cyclic shift of a ZC/PN sequence. As shown in FIG. 27A, for M-symbol PUCCH, K symbols are modulated on a ZC/PN sequence or modulated with a cyclic shift of a ZC/PN sequence (K>=0). be. Other MK symbols may be any kind of control information. FIG. 27B also shows another possible UL region design according to embodiments of the present disclosure, where there is one symbol for DMRS and one symbol for modulated PUCCH. DMRS and/or PUCCH symbols can be contiguous or staggered. Note that the DMRS, PUCCH and data locations may differ from those shown in FIGS. 27A and 27B.

Additionally, embodiments of the present disclosure may provide one or more DMRSs within a window time for demodulation, as shown in FIGS. 28A-28C. In one embodiment of the present disclosure, in a window time there may be multiple subframes as shown in FIG. 28A or multiple symbols as shown in FIG. may be combined with the solution of The window time value may be predefined or dynamically/semi-statically signaled.

So far, the solution to the UL information transmission has been mainly described. This disclosure also provides a method of receiving UL information, which is described with reference to FIG.

As shown in FIG. 29, method 2900 may begin at step 2910 with first receiving a reference signal transmitted using a first sequence. The first sequence of reference signals may have a base sequence as shown in FIG. 6, may be one of the sequences shown in FIG. 11, or other sequences with orthogonality in the frequency domain. may be The first reference signal may be a sequence transformed from the base sequence by cyclic shifting, phase rotation or any other transformation. Additionally, the reference signal may be, for example, a DMRS signal or other reference signal.

In step 2920, receive control information sent using the second sequence. Similarly, the second sequence of control information may have a base sequence as shown in FIG. 6, may be one of the sequences of FIG. may be a sequence of 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 have different base sequences with the same or different lengths. For example, the first sequence can have a base sequence as shown in FIG. 6, while the second sequence can be one of the sequences as shown in FIG. The control information may be PUCCH information such as NACK/ACK, CQI, PMI, RI.

Next, in step S2930, the control information is demodulated using the reference signal. In particular, the reference signal and the UL control information are alternately shifted and multiplexed in the frequency domain. In one embodiment of the present disclosure, demodulating the control information further comprises obtaining UL control information using the channel information with the second sequence, the channel information using the first sequence obtained from the reference signal by That is, first, the channel information is 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. .

In another embodiment of the disclosure, demodulating the control information comprises obtaining the second sequence using the channel information, the channel information obtained from the reference signal using the first sequence. and obtaining control information based on a relationship between the first sequence and the second sequence. In such a case, after obtaining channel information based on the reference signal, further obtaining a second sequence based on the channel information, and then determining the relationship between the first sequence and the second sequence as control information. further determine the relationship that implies . Therefore, in this embodiment, information bits are implicitly transmitted. In other words, the information bits themselves are not multiplexed with the second sequence and are implied by the first and second sequences.

In embodiments of the present disclosure, the reference signal and UL control information are staggered and multiplexed in a number of different ways. For example, the reference signal and the UL control information can be multiplexed by staggering by one resource element using one reference signal for one UL control information. Alternatively, the reference signal and UL control information are staggered and multiplexed with one reference signal shared by two or more portions of the UL control information for every two or more resource elements. can be done.

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

In embodiments in which the UL control information and the reference signal are transmitted at different time intervals or not all the UL control information is transmitted with the reference signal, one of the sequences of previous reference signals and previous control information is: Used as a reference signal to demodulate the UL control information without a reference signal available. In such a case, the method provides a reference for the UL control information without an available reference signal and without an available reference signal that depends on the time interval from the previous reference signal and the previous control information to the UL control information. It can further comprise determining a signal.

Some details about PUCCH design, first sequence, second sequence, staggered multiplexing, resource mapping, etc. have already been described in detail with reference to FIGS. are not detailed here. For simplification purposes and for details thereof, refer to the description with reference to FIGS.

In embodiments of the present disclosure, uplink information is transmitted in reduced uplink symbols to provide a new solution for UL transmission and reception that can adapt to subframe configurations with reduced uplink symbols; Therefore, the transmission waiting time can be greatly reduced.

FIG. 30 schematically shows a block diagram of an apparatus for transmitting UL information according to one embodiment of the disclosure. As shown in FIG. 30 , device 3000 includes reference signal transmitter 3010 and control information transmitter 3020 . The reference signal transmitter 3010 can be configured to transmit the reference signal using the first sequence. The control information transmitter 3020 can be configured to transmit UL control information using the second sequence. In particular, the reference signal and the UL control information are alternately shifted and multiplexed in the frequency domain.

In one embodiment of the present disclosure, the UL control information is modulated based on the second sequence, meaning that bits of UL control information are implicitly transmitted. In another embodiment of the present disclosure, the first sequence and the second sequence may have a pre-determined relationship used to implicitly indicate UL control information.

In embodiments of the present disclosure, the first sequence and the second sequence share the same or the same base sequence. Alternatively, the first sequence and the second sequence can have different base sequences.

In embodiments of the present disclosure, the reference signal and UL control information may be staggered and multiplexed in any suitable manner. For example, one reference signal may be used for one UL control information, and the reference signal and the UL control information may be alternately shifted and multiplexed for each resource element, or the reference signal and the UL control information may be multiplexed. can be staggered and multiplexed by more than one resource element using one reference signal shared by more than one portion of UL control information.

In embodiments of the present disclosure, reference signals and UL control information may be mapped in any suitable manner. In one embodiment of the present disclosure, 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 signal hop in two symbols.

In one embodiment of the present disclosure, UL control information and reference signals may be transmitted in different time periods. In another embodiment of the present disclosure, not all UL control information is transmitted with the reference signal. In both cases it means that there is some UL control information without reference signals available. In such cases, one of the previous control signals and one of the previous control information can be used as reference signals for the UL control information without available reference signals. In one embodiment of the present disclosure, the reference signal for UL control information without available reference signal is from previous reference signal and previous control information to UL control information without available reference signal. Time interval dependent.

FIG. 31 further shows an apparatus for receiving UL information. As shown in FIG. 31, device 3100 includes reference signal receiver 3110 , control information receiver 3120 , and demodulator 3130 . The reference signal receiver 3110 may be configured to receive the reference signal transmitted using the first sequence. The control information receiver 3120 may be configured to receive control information transmitted using the 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.

In one embodiment of the present disclosure, the demodulator 3130 is further configured to obtain UL control information using the channel information with the second sequence, the channel information being referenced by using the first sequence. Taken from the signal.

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

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

In one embodiment of the present disclosure, the reference signal and UL control information are staggered and multiplexed for each resource element with one reference signal for one UL control information. In another embodiment of the present disclosure, the reference signal and UL control information are staggered with one reference signal shared by two or more portions of UL control information for every two or more resource elements. Multiplexed.

In one embodiment of the present disclosure, UL control information and reference signals are mapped to both edges of the system bandwidth. In another embodiment of the disclosure, the UL control information and reference signal may hop in two symbols.

In one embodiment of the present disclosure, one of the previous reference signal and subsequent previous control information sequence may be used as the reference signal for demodulating the UL control information without an available reference signal. . In such a case, the apparatus 3100 is configured to determine a reference signal for UL control information without an available reference signal that depends on the time interval from the previous reference signal to the previous control information. A signal determination unit 3140 is further provided. The time interval is the time interval for UL control information without reference signal available.

The devices 3000 and 3100 have been briefly described above with reference to FIGS. Note that devices 3000 and 3100 may be configured to implement functionality such as described with reference to Figures 8-29. Therefore, for details on the operation of the modules in these devices, reference can be made to the descriptions of the method steps described with reference to Figures 8-29.

Further, it should be noted that components of devices 3000 and 3100 may be embodied in hardware, software, firmware, and/or any combination thereof. For example, the components of devices 3000 and 3100 may each be implemented by a circuit, processor or any other suitable selection device. Those skilled in the art will appreciate that the above examples are illustrative rather than limiting.

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

FIG. 32 also shows a simplified block diagram of apparatus 3210, which may be embodied as or included in a terminal such as a UE for a wireless network within a wireless network; A base station such as a NB or eNB as described herein.

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

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

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

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

Processors 3211 and 3321 may be of any type suitable for the local technology environment and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processor DSPs and processors based on multi-core processor architectures. is a non-limiting example.

Further, the present disclosure may also provide a carrier containing a computer program as described above, wherein the carrier is one of an electronic signal, optical signal, radio signal, or computer readable storage medium. Computer readable storage media include, for example, optical compact discs or electronic memory devices such as RAM (random access memory), ROM (read only memory), flash memory, magnetic tapes, CD-ROMs, DVDs, Blu-ray discs, and the like.

The technology described herein is such that a device that implements one or more functions of the corresponding device described in one embodiment implements the corresponding one or more functions as well as prior art means. The apparatus may comprise separate means for each separate function, or means that may be configured to perform more than one function. 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 can be through modules (eg, procedures, functions, and so on) that perform the functions described herein.

Exemplary embodiments herein are described above with reference to block diagrams and flowchart illustrations of methods and apparatus. 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 may be used on a general purpose computer, special purpose computer, or other programmable computer, such that the instructions, executed on a computer or other programmable data processing apparatus, create the means for performing the specified functions. loaded into the data processing apparatus and within one or more blocks of the flowchart.

Although this specification contains many specific implementation details, these should not be construed as limitations on the scope of implementation or the scope of claims, but rather features specific to particular embodiments of particular implementations. should be interpreted as a description of Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination. Further, features are described above as working in particular combinations, and even if originally claimed as such, in some cases one or more features from the claimed combination can be cut out of combinations, or can include variations of subcombinations.

It will be apparent to those skilled in the art that as technology advances, the inventive concept can be implemented in various ways. The above-described embodiments are provided to illustrate rather than limit the disclosure, and modifications and variations are possible without departing from the spirit and scope of the disclosure, as those skilled in the art will readily appreciate. It should be understood that there is Such modifications and variations are considered to fall within the scope of the disclosure and appended claims. The protection scope of the present disclosure is defined by the attached claims.

Claims (23)

a base station,
means for transmitting parameters corresponding to a first type PUCCH (Physical Uplink Control Channel) to a UE (User Equipment) by RRC (Radio Resource Control) signaling;
means for receiving from the UE a first sequence for the first type PUCCH;
The first sequence is defined by 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 is based on one of four sets of two-bit pair values of Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information bits;
each value of k in one symbol in the time domain is different for each of the four sets;
each of the HARQ-ACK information bits is either 0 to indicate NACK or 1 to indicate ACK;
base station. means for interpreting at least one of said NACKs or said ACKs from said first sequence from said four sets;
A base station according to claim 1. the base sequence is defined by R(n)=e ^jφ(n)π/4 ;
the value of φ(n) varies between −1, 1, −3, or 3 depending on the value of n;
A base station according to claim 1. the first sequence is mapped to resource elements without being multiplied with symbols modulated from the HARQ-ACK information bits;
A base station according to claim 1. The first type PUCCH is received without frequency division multiplexing with DMRS (Demodulation Reference Signal),
A base station according to claim 1. The first type PUCCH is received without time division multiplexing with the DMRS,
A base station according to claim 5 . a value of k any of {0, 1, 2} based on the first of the four sets;
any value of k among {3, 4, 5} based on the second set of the four sets;
any value of k among {6, 7, 8} based on the third set of the four sets,
any of {9, 10, 11} values of k based on the fourth set of the four sets;
A base station according to claim 1. a first value of k based on a 2-bit pair value of the HARQ-ACK information bits indicated by 2 bits 00;
a second value of k based on the value of the 2-bit pair of said HARQ-ACK information bits indicated by 2 bits different from 00,
is a multiple of 3,
A base station according to claim 1. the value of k based on the 2-bit pair values of the HARQ-ACK information bits is UE-specific in one symbol in the time domain;
A base station according to any one of claims 1-8. The first type PUCCH is received with a time length of 1 symbol,
A base station according to any one of claims 1-9. The α is a cyclic shift,
A base station according to claim 1. UE (User Equipment),
means for receiving parameters corresponding to a first type PUCCH (Physical Uplink Control Channel) from a base station by RRC (Radio Resource Control) signaling;
means for transmitting a first sequence for the first type PUCCH to the base station;
The first sequence is defined by 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 is based on one of four sets of two-bit pair values of Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information bits;
each value of k in one symbol in the time domain is different for each of the four sets;
each of the HARQ-ACK information bits is either 0 to indicate NACK or 1 to indicate ACK;
U.E. the base sequence is defined by R(n)=e ^jφ(n)π/4 ;
the value of φ(n) varies between −1, 1, −3, or 3 depending on the value of n;
13. The UE of claim 12. the first sequence is mapped to resource elements without being multiplied with symbols modulated from the HARQ-ACK information bits;
13. The UE of claim 12. The first type of PUCCH is transmitted without frequency division multiplexing with DMRS (Demodulation Reference Signal),
13. The UE of claim 12. The first type PUCCH is transmitted without being time division multiplexed with the DMRS,
16. The UE of claim 15. a value of k any of {0, 1, 2} based on the first of the four sets;
any value of k among {3, 4, 5} based on the second set of the four sets;
any value of k among {6, 7, 8} based on the third set of the four sets,
any of {9, 10, 11} values of k based on the fourth set of the four sets;
13. The UE of claim 12. a first value of k based on a 2-bit pair value of the HARQ-ACK information bits indicated by 2 bits 00;
The difference between the value of the HARQ-ACK information bits indicated by two bits different from 00 and a second value of k based on the value of the two-bit pair is
is a multiple of 3,
13. The UE of claim 12. the value of k based on the 2-bit pair values of the HARQ-ACK information bits is UE-specific in one symbol in the time domain;
13. The UE of claim 12. The first type PUCCH is transmitted with a time length of 1 symbol,
13. The UE of claim 12. The α is a cyclic shift,
13. The UE of claim 12. A method performed by a base station, comprising:
To the UE (User Equipment), RRC (Radio Resource Control) signaling, by transmitting the parameters corresponding to the first type PUCCH (Physical Uplink Control Channel),
receive a first sequence for the first type of PUCCH from the UE;
The first sequence is defined by 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 is based on one of four sets of two-bit pair values of Hybrid Automatic Repeat Request Acknowledgment (HARQ-ACK) information bits;
each value of k in one symbol in the time domain is different for each of the four sets;
each of the HARQ-ACK information bits is either 0 to indicate NACK or 1 to indicate ACK;
Method. A method performed by a UE (User Equipment),
From the base station, receive parameters corresponding to the first type PUCCH (Physical Uplink Control Channel) by RRC (Radio Resource Control) signaling,
transmitting a first sequence for the first type PUCCH to the base station;
The first sequence is defined by 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 is based on one of four sets of two-bit pair values of HARQ-ACK (Hybrid Automatic Repeat Request Acknowledgment) information bits;
each value of k in one symbol in the time domain is different for each of the four sets;
each of the HARQ-ACK information bits is either 0 to indicate NACK or 1 to indicate ACK;
Method.

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