JP7491438B2 - Method performed by a base station, method performed by a UE, base station and UE - Google Patents

Description

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 communication, 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, etc. The PUCCH is an 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 FIG. 1, the three middle symbols are used to transmit DMRS, and the other symbols are used to transmit PUCCH symbols.

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 frame configuration with only one or more symbols has been proposed for latency reduction, which means there is one symbol or multiple symbols for UL transmission. For illustration purposes, FIG. 2 shows one of the possible new subframe configurations, 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 other positions and/or may comprise multiple UL symbols.

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

The present disclosure provides a new solution for UL information transmission and reception that alleviates or at least mitigates at least some of the problems of the prior art.

According to a first aspect of the present disclosure, a method for transmitting UL information is provided. The method 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 a staggered manner in the frequency domain.

In a second aspect of the present disclosure, a method for receiving UL information is provided. The method includes 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, where the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

In a third aspect of the present disclosure, an apparatus for transmitting UL information is also provided. The apparatus includes 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 the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

In a fourth aspect of the present disclosure, an apparatus for receiving UL information is provided. The apparatus includes a reference signal receiving unit configured to receive a reference signal transmitted using a first sequence, a control information receiving unit configured to receive control information transmitted using a second sequence, and a demodulation unit configured to demodulate the control information using the reference signal, and the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

According to a fifth aspect of the present disclosure, a computer-readable storage medium is provided 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.

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.

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 can be transmitted in reduced uplink symbols to accommodate a reduced uplink symbol subframe configuration, thus significantly reducing the transmission latency.

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

FIG. 1 illustrates a schematic of UL symbols within an existing subframe structure.

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

FIG. 3 illustrates a schematic diagram of a PUCCH pattern in an existing communication system.

FIG. 4 illustrates a schematic diagram of a constellation mapping for HARQ ACK/NACK.

FIG. 5 illustrates a schematic diagram of UL information transmission in existing PUCCH format 1a/1b.

FIG. 6 illustrates a basic sequence of UL symbols.

FIG. 7 illustrates a schematic diagram of UL information transmission in existing PUCCH format 2a/2b.

FIG. 8 illustrates generally a flowchart of a method for transmitting UL information according to one embodiment of the present disclosure.

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

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

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

FIG. 12 illustrates generally another new PUCCH structure according to another embodiment of the present disclosure.

FIG. 13 illustrates a schematic diagram of a further new PUCCH structure according to a further embodiment of the present disclosure.

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

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

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

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

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

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

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

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

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

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

FIG. 24 illustrates a schematic diagram of 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.

FIG. 25 illustrates a schematic diagram of a further PUCCH structure according to a further embodiment of the present disclosure.

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

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

FIG. 28A illustrates generally another DMRS window design according to another embodiment of the present disclosure. FIG. 28B illustrates a schematic diagram of another DMRS window design according to another embodiment of the present disclosure. FIG. 28C illustrates a schematic diagram of another DMRS window design according to another embodiment of the present disclosure.

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

FIG. 30 illustrates generally a block diagram of an apparatus for transmitting UL information according to one embodiment of the present disclosure.

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

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.

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 present disclosure are illustrated in block diagrams, flow charts and other diagrams. Each block in the flow chart or block may represent a module, program or part of code that includes one or more executable instructions for performing a specified logical function, and in this disclosure, the dispensable blocks are illustrated with dotted lines. Furthermore, although these blocks are shown in a specific sequence for performing the steps of the present method, in reality, they need not be performed strictly according to the illustrated sequence. For example, they may be performed in reverse order or simultaneously depending on the nature of the respective operations. It should also be noted that the block diagrams of the flow chart and/or each block and combinations thereof may be realized by a dedicated hardware-based system for performing a specific function/operation, or by a combination of dedicated hardware and computer instructions.

In general, terms used in the claims are to be interpreted according to their ordinary meaning in the art unless expressly defined herein. 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.

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. Furthermore, 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.

As described above, in the existing subframe, all seven symbols in a slot can be used as UL symbols. Below, the PUCCH pattern in the existing communication will be described with reference to Figures 3 to 7 in order to better understand the present disclosure.

First, we refer to Figure 3, which shows the PUCCH pattern in an existing communication system in more detail. In Figure 3, 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.

In existing communications, the format for PUCCH includes format 1a/1b and format 2a/2b, where format 1a/1b is used to transmit 1-bit or 2-bit ACK/NACK, and format 2a/2b is used to transmit uplink CQI and 1-bit or 2-bit ACK/NACK. Typically, 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. Figure 4 shows a schematic diagram of 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.

FIG. 5 shows a schematic diagram of UL information transmission in the 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 base sequence of length 12. The base sequence is shown in FIG. 6. The base sequence is shifted by using different cycle shifts and further multiplied with an OCC sequence as shown in FIG. 5. The resulting signal is further processed through an inverse fast Fourier transform (IFFT) to form symbols #0, #1, #5 and #6 of single carrier frequency division multiple access (SC-FDMA). Meanwhile, the base sequence shifted using different cycle shifts is multiplied with an OCC sequence, and the resulting signal is processed by IFFT, thereby forming a DM-RS symbol. In other words, the formation of DMRS and PUCCH is substantially similar, except that the d ₀ of the NACK symbol is not multiplied with the DM-RS symbol.

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 no OCC sequence is used, the coded CSI bits (10 bits) after QPSK modulation are converted to five data d0 to d5 through serial-parallel processing, and the PUCCH symbol and the DMRS symbol have 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 solution for transmitting and receiving UL control information, which will be described with reference to Figures 8 to 32.

Figure 8 shows a schematic flow chart of a method for transmitting UL information according to one embodiment of the present disclosure. As shown in Figure 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, in particular, the reference signal and the UL control information are multiplexed in a staggered manner in the frequency domain.

For better understanding of the present disclosure, FIG. 9 further illustrates 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 having a length of N is first transformed into R′ ₁ through a transformation such as 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 any of the constellation mappings as shown in FIG. 4. Then, the information symbols d _i are further multiplied with, for example, a cyclically shifted sequence R′ ₂ from a base sequence 2 having a length of M. The resultant Y is then mapped to a physical resource.

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, for example, as shown in FIG. 6. To obtain PUCCH symbol d ₀ , 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 symbol is then modulated onto the base sequence, which is also used for DMRS. The PUCCH symbol Y _n modulated onto the base sequence can be expressed as follows:
_Yn = _d0 · _Rn , n = 0, 1, . ． ． , 11

where Y _n denotes the resulting symbol after modulation, d ₀ denotes the PUCCH symbol after constellation mapping, and R _n denotes the base sequence. Thus, for PUCCH, the total number of resource elements is 24.

Figure 11 illustrates another basic sequence that may be used for DMRS and PUCCH information according to an embodiment of the present disclosure. The orthogonal sequence _Rn (i) may be based on an 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 for DMRS and PUCCH are not limited to those shown in Figure 6 or Figure 11, and in practice any suitable sequence may be used as long as frequency orthogonality is guaranteed.

FIG. 12 illustrates another new PUCCH structure according to another embodiment of the present disclosure, which is used with the 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 d ₀ , 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 symbol is then modulated onto the base sequence of length 6. The PUCCH symbol Y _n modulated onto the base sequence can be expressed as follows:
_Yn = _d0 · _Rn (i), i = 0, 1, . ． ． , 5
Here, 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.

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

In a further embodiment of the present disclosure, the DMRS uses a base sequence of length 12, for example as shown in Figure 6. Meanwhile, the PUCCH uses a different sequence, for example as shown in Figure 11. Figure 13 shows a schematic diagram of 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 _n modulated on the base sequence can be expressed as follows:
_Yn = _d0 ·S(i), i = 0, 1, . ． ． , 5
where _Yn denotes the resulting symbol after modulation, _d0 denotes the PUCCH symbol after constellation mapping, and S(i) denotes the base 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.

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. Also, the base sequence _R1 and the base sequence _R2 can share the base sequence. As another option, the two base sequences may be different. For example, the base sequence _R2 may be a different root sequence of the base sequence _R1 . Also, the two base sequences _R1 and _R2 may have the same length, i.e., M=N, or different lengths, i.e., M≠N. The sequence _R'1 (first sequence) for DMRS is the same as the base sequence _R1 , or the sequence _R'1 can be transformed from the base sequence _R1 through cyclic shift or phase rotation. The sequence _R'2 (second sequence) for modulating the PUCCH symbol is the same as the base sequence _R2 , or the sequence _R'1 can be transformed from the base sequence _R1 through cyclic shift or phase rotation.

In the embodiments of the present disclosure, PUCCH and RS can 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 can be staggered multiplexed on every RE, i.e., one RS for one PUCCH. In Figure 14B, RS and PUCCH can be staggered multiplexed on every k REs, i.e., one RS for k PUCCHs, and c _i and d _m are modulation symbols that can come from the same or different UEs. Figure 14C shows another example of a multiplexing method similar to that in Figure 14B, but in Figure 14C, PUCCH is not continuous in frequency but separated by DMRS. Figure 14D further shows a further exemplary multiplexing method, in which RS and PUCCH use different length sequences and one PUCCH uses one RS. 14E illustrates a further exemplary multiplexing scheme according to further embodiments of the present disclosure, in which the PUCCH is not separated by the DMRS but is contiguous in frequency, which means that the DMRS is also contiguous in frequency.

In the following, for the sake of explanation, we give 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:
_dmi = _dmj , or _din = _djn
Furthermore, the symbols may, for example, have different phase rotations.
d _mi = e ^jkθ * d _mj , or d _in = e ^jkθ * d _jn
The symbols can have different orders, for example one with ascending order and one with descending order, as shown below:
_d00 = _d1n , _d01 = _d1n-1 , ... _d0n = _d10
Also, the symbols may be completely different.

For RS sequences R _mn (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 and may have different phase rotation or cycle shift values.

15A to 15F are schematic diagrams illustrating an exemplary resource mapping method according to an embodiment of the present disclosure. As shown in FIG. 15A, both the DMRS sequence and the modulated PUCCH based on the sequence are mapped in a sequential order, for example. The modulated PUCCH symbols are mapped in the order of _d00 , _d01 ... _d0n , _d10 , _d11 ,... _d1n ,... _dm0 , _dm1 ,... _dmn , and the _DMRS sequence is mapped in the order of _R00 , _R01 ... _R0n , _R10 , _R11 ,... _R1n ,... _dm0 , _dm1 ,...dmn. On the other hand, in FIG. 15B, the sequence-based DMRS sequence and modulated PUCCH are mapped from the edge of the band.

In an embodiment of the present disclosure, the PUCCH with DMRS can be arranged on the physical resource blocks (PRBs) in a predefined order within a predefined RB. For example, different PUCCH symbols can be arranged on different PRBs as shown in FIG. 15C. For frequency diversity, the PUCCH symbols can be mapped to both edges of the system band 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 remaining system band, and so on.

In another embodiment of the present disclosure, copies of the PUCCH and DMRS may be placed on the PRBs. For example, as shown in FIG. 15E, DMRS _R00 , _R10 , through _Rm0 and PUCCH _d0 * _R'00 , _d1 * _R'10 through _dm * _R'm0 are first mapped onto a first edge of the system band, DMRS _R01 , _R11 through _Rm1 and PUCCH _d0 * _R'01 , _d1 * _R'11 through _dm * _R'm1 are then mapped from the second opposite edge of the system band, and so on. Furthermore, Figure 15F also shows another resource mapping scheme, where DMRS _R00 , _R10 to _Rm0 and PUCCH _d0 * _R'00 , _d1 * _R'10 to _dm * _R'm0 are first mapped from on a first edge of the system band, similar to Figure 15E, and DMRS _Rm1 , Rm _-11 to _R01 and PUCCH _d0 * _R'01 , _d1 *R'm _-1 to _dm * _R'01 are then mapped from the second opposite edge of the system band, in a different order than Figure 15E, and so on. Furthermore, the duplication of PUCCH in different PRBSs can also be arranged on PRBs as shown in Figure 15A or 15B.

Please also note that the mapping order (e.g., hopping) can be changed in a predefined order in different symbols/subframes/PRBs.

The present disclosure has been described above primarily with reference to a single UL symbol design. In practice, a frame design of L UL symbols may also be used. This means that a subframe may have a reduced number of 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, e.g., as shown in FIG. 16A. Alternatively, there may be hopping between the two symbols, as shown in FIG. 16B. Furthermore, for M (1=<M<=L) symbols within the L symbols, the PUCCH and RS sequences can be staggered by one or more REs in frequency, and the other (L-K) symbols can be used for the PUCCH, as shown in FIG. 16C.

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 (which can be consecutive or staggered) and others can be used for PUCCH as shown in FIG. 16D.

17A and 17B show the mapping of PUCCH and RS in a sequence, and 17C and 17D show the mapping of PUCCH and DMRS from the edge of the system band. From 17A and 17B, it can be seen that for L UL symbols, PUCCH and DMRS are multiplexed in time and placed on PRBs in a predefined order. For example, PUCCH with DMRS can be mapped in order as shown in 17A, or from both edges of the system band as shown in 17C. Furthermore, overlapping of PUCCH with DMRS can also be placed on PRBs. As another alternative, PUCCH and DMRS can be hopped within a symbol as shown in 17B and 17D. In addition, for illustrative purposes only, 18A to 18D show the mapping of PUCCH and DMRS in a sequence and from the edge of the system band for a common representation.

FIG. 19 illustrates a block diagram of DMRS and PUCCH information transmission according to another embodiment of the present disclosure. In the embodiment of the present disclosure, the PUCCH information symbols are not modulated based on the second sequence, but are indicated by the relationship between the first and second sequences to be transmitted. As shown in FIG. 19, in the case of DMRS, the N-length base sequence 1 is first transformed to R′ ₁ through a transformation such as a cyclic shift or phase rotation, and then mapped to a physical resource. At the same time, the PUCCH information bits are first mapped to information symbols through any of the constellation mappings as shown in FIG. 4. The sequence R′ ₂ is transformed from the M-length base sequence 2, for example, cyclically shifted or phase rotated from the base sequence 2. Then, the resulting sequence R′ ₂ is mapped to a physical resource. In this solution, the information symbols d _i are not further multiplied by the sequence R′ ₂ similar to FIG. 9. Instead, the information symbols d _i are implicitly indicated by the relationship between the sequence R′ ₁ and the sequence R′ ₂ . Then, _R'2 is transmitted together with the DMRS sequence _R'1 .

FIG. 20 illustrates a schematic diagram of a new PUCCH configuration according to one embodiment of the present disclosure, where information symbols d _i are 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.

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 R ₁ and R ₂ 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, base sequences as 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 may 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 the CS indices of _Rn . If k1-k2=6, it indicates that the information symbol is +1, and if k1-k2=-6, it indicates that the information symbol is -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 transmit is 24 (2N).

PUCCH mapping and multiplexing is similar to the embodiment shown in Figure 9, so for details, please refer to Figures 10 to 18.

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, where the sequence is divided into k different groups and the modulated PUCCH symbols are indicated by predefined groups.

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

Figure 22 further illustrates a schematic diagram of a QPSK constellation mapping according to one embodiment of the present disclosure. As shown in Figure 22, four sequence groups k1 to k4 are mapped to four NACK/ACK symbols.

The Q sequences may be different base sequences, different cyclic shifts of one or more base sequences, or different transformations of one or more base sequences, e.g., through phase rotation ( _R1 = ^ejθ * _R2 ). These sequences may be staggered or continuously mapped in frequency or time domain. The total number of REs for transmitting PUCCH information implicitly is N.

23-24 show 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 shown 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 to 2 are grouped into a first group, cyclic shifts 3 to 5 into a second group, cyclic shifts 6 to 8 into a third group, and cyclic shifts 9 to 11 into a fourth group. Figure 24 illustrates a schematic of 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 respectively mapped to QPSK {+1, -1, +j, -j}.

Furthermore, FIG. 23 shows another possible grouping in which cyclic shifts 0, 4, 8 are divided into a first group, cyclic shifts 1, 5, 9 are divided into a second group, 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 the example of possible groupings, it should be understood 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 in a cyclic shift group to indicate their PUCCH symbols. If the base sequence is 12, the total number of REs for transmitting PUCCH is implicitly 12.

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

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 dynamically or semi-statically signaled 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 dynamically or semi-statically signaled 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.

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 factor 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 are modulated with ZC/PN sequences or represented with cyclic shifts, others are represented with different sequences or are not modulated on sequences, as shown in Figures 26A and 26B. Usually, important PUCCH information is modulated with DMRS sequences to obtain accurate results. For example, ACK/NACK is more important than CSI, so it may be modulated on ZC/PN sequences or represented with cyclic shifts. In contrast, CSI is less important, so CSI is not modulated with ZC/PN sequences. The ZC/PN sequence for ACK/NACK can be used as a demodulation RS for CSI, which can obtain the additional advantage of some PUCCHs without available reference signals. 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 reference signals. However, in either of the two cases, there may be PUCCHs without available reference signals. In such a case, it is possible to use a previous reference signal, e.g., the closest reference signal. As an alternative option, the sequence for the previous control information can also be used, since the received sequence itself carries channel information that can be used as RS for other PUCCHs. In certain embodiments of the present disclosure, the reference signal for the 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 a 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 as described above to achieve higher accuracy.

Figure 27A shows one possible UL region design according to an embodiment of the present disclosure. Assume 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 can be modulated with a ZC/PN sequence or modulated with a cyclic shift of the ZC/PN sequence. As shown in Figure 27A, for an M symbol PUCCH, K symbols are modulated on a ZC/PN sequence or modulated with 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. Please note that the locations of the DMRS, PUCCH and data may differ from those shown in Figures 27A and 27B.

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-28C. In an embodiment of the present disclosure, in the window time, there may be 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.

The above mainly describes a solution for transmitting UL information. This disclosure also provides a method for receiving UL information, which is described with reference to FIG. 29.

As shown in FIG. 29, the method 2900 may begin with step 2910 of initially 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 may be other sequences with 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 other reference signal.

In step 2920, the control information transmitted using the 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 of FIG. 11, or may be other sequences with 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 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.

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, 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 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 is further determined, the relationship being implicitly indicative of the control information. 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.

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

In embodiments of the present disclosure, the UL control information and reference signals are 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 in two symbols.

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, the reference signal being dependent on the previous reference signal and the time interval from the previous control information to the UL control information.

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 simplicity and for those details, please refer to the description with reference to Figures 8 to 28.

In an embodiment of the present disclosure, uplink information is transmitted in reduced uplink symbols to provide a new solution for UL transmission and reception that can accommodate a reduced subframe configuration of uplink symbols, thus significantly reducing transmission latency.

Figure 30 illustrates a block diagram of an apparatus for transmitting UL information according to one embodiment of the present disclosure. As shown in Figure 30, the apparatus 3000 includes a reference signal transmitting unit 3010 and a control information transmitting unit 3020. The reference signal transmitting unit 3010 can be configured to transmit a reference signal using a first sequence. The control information transmitting unit 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.

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 may have a predetermined relationship that is used to implicitly indicate the UL control information.

In embodiments of the present disclosure, the first sequence and the second sequence are identical or share 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 the UL control information may be staggered and multiplexed in any suitable manner. For example, the reference signal and the UL control information may be staggered and multiplexed by one resource element using one reference signal for one UL control information, or the reference signal and the UL control information may be staggered and multiplexed by more than one resource element using one reference signal shared by more than one portion of the UL control information.

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

In one embodiment of the present disclosure, the UL control information and the reference signal can be transmitted in different time periods. In another embodiment of the present disclosure, not all UL control information is transmitted with a reference signal. In both cases, it 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.

FIG. 31 further illustrates an apparatus for receiving UL information. As shown in FIG. 31, the apparatus 3100 includes a reference signal receiving unit 3110, a control information receiving unit 3120, and a demodulation unit 3130. The reference signal receiving unit 3110 may be configured to receive a reference signal transmitted using a first sequence. The control information receiving unit 3120 may be configured to receive control information transmitted using a second sequence. The demodulation unit 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 channel information together with the second sequence, the channel information being obtained from the reference signal by using the first sequence.

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.

In one embodiment of the present disclosure, the first sequence and the second sequence may be identical or may share the same base sequence. In another embodiment of the present 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 multiplexed in a staggered manner on a resource element basis with one reference signal for one UL control information. In another embodiment of the present disclosure, the reference signal and UL control information are multiplexed in a staggered manner on two or more resource elements basis with one reference signal shared by two or more portions of the UL control information.

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.

In one embodiment of the present disclosure, one of the previous reference signal and the subsequent sequence of 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 comprises 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.

The above briefly describes the devices 3000 and 3100 with reference to Figs. 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 Figs. 8 to 29. Therefore, for details on the operation of the modules in these devices, reference may be made to the description of each step of the method described with reference to Figs. 8 to 29.

Furthermore, it should be noted that the 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 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 illustration only and not limitation.

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, semiconductor memory devices such as RAM, ROM, EPROM, EEPROM, flash memory devices, etc. 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 an embodiment, the computer-executable instructions may be configured to cause the devices 3000 and 3100, using the at least one processor, to perform operations according to the methods described with reference to each of Figures 8-29.

FIG. 32 further illustrates 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, in a wireless network, and apparatus 3220 is a base station, such as a NB or eNB, as described herein.

The device 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 device 3210 may further comprise a transmitter TX and a receiver RX 3213 coupled to the processor 3211, which may be communicatively connected to the device 3220 for operation. The MEM 3212 stores a program (PROG) 3214. The PROG 3214 may include instructions that, when executed on an associated processor 3211, enable the device 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.

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, which may be operable to wirelessly communicate with the device 3210. The MEM 3222 stores PROG 3224. The PROG 3224 may include instructions that, when executed on an associated processor 3221, enable the device 3220 to operate in accordance with embodiments of the present disclosure, such as instructions for performing the 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.

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

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, 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 the following: general purpose computers, special purpose computers, microprocessors, digital signal processors DSPs and processors based on multi-core processor architectures, as non-limiting examples.

The present disclosure may further provide a carrier containing such a computer program, where the carrier is one of an electronic signal, an optical signal, a radio signal, or a 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 tape, CD-ROM, DVD, Blu-ray disc, etc.

The techniques described herein are means for an apparatus implementing one or more functions of a corresponding apparatus described in one embodiment, as well as means of the prior art, to implement the corresponding one or more functions, and 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 apparatuses), firmware (one or more apparatuses), software (one or more modules), or a combination thereof. In the case of firmware or software, the implementation may be via modules (e.g., procedures, functions, etc.) that perform the functions described herein.

The exemplary embodiments herein are described above with reference to block diagrams and flowchart diagrams of methods and apparatus. It will be understood that each block of the block diagrams and flowchart diagrams, and combinations of blocks in the block diagrams and flowchart diagrams, 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.

While the specification contains many specific implementation details, these should not be construed as limitations on the scope of the implementation or scope of what can be claimed, but rather as descriptions 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 carved out of the combination or may include variations of the subcombination.

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-mentioned embodiments are given to illustrate, not to 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 readily understand. Such modifications and variations are considered to be within the scope of the disclosure and the appended claims. The scope of protection of the present disclosure is defined by the appended claims.

Claims (23)

A base station,
A means for transmitting a parameter indicating the number of symbols of a first type of 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 of PUCCH;
The first sequence is defined as 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 values of two-bit pairs of Hybrid Automatic Repeat Request Acknowledgement (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 indicating a Negative Acknowledgement (NACK) or 1 indicating an Acknowledgement (ACK);
base station. means for interpreting at least one of the NACK or the ACK from the first sequence from the four sets;
The base station according to claim 1 . The base sequence is defined as 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.
The base station according to claim 1 . the first sequence is mapped to resource elements without being multiplied by symbols modulated from the HARQ-ACK information bits;
The base station according to claim 1 . The first type PUCCH is received without being frequency-division multiplexed with a Demodulation Reference Signal (DMRS);
The base station according to claim 1 . The first type PUCCH is received without being time-division multiplexed with the DMRS.
The base station according to claim 5. a value of k that is one of {0, 1, 2} based on a first set of the four sets;
a value of k in the range {3, 4, 5} based on a second set of the four sets;
a value of k in the range {6, 7, 8} based on a third set of the four sets;
The value of k is one of {9, 10, 11} based on a fourth of the four sets.
The base station according to claim 1 . 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 with the second value of k based on the value of the pair of two bits of the HARQ-ACK information bits indicated by two bits different from 00 is
It is a multiple of 3.
The base station according to claim 1 . The value of k based on the value of the two-bit pair of HARQ-ACK information bits is UE-specific in the one symbol in the time domain.
A base station according to any one of claims 1 to 8. 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. The α is a cyclic shift.
The base station according to claim 1 . A UE (User Equipment),
A means for receiving a parameter indicating a number of symbols of 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 of PUCCH to the base station;
The first sequence is defined as 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 values of two-bit pairs of Hybrid Automatic Repeat Request Acknowledgement (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 indicating a Negative Acknowledgement (NACK) or 1 indicating an Acknowledgement (ACK);
U.E. The base sequence is defined as 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.
The UE of claim 12. the first sequence is mapped to resource elements without being multiplied by symbols modulated from the HARQ-ACK information bits;
The UE of claim 12. The first type PUCCH is transmitted without being frequency-division multiplexed with a Demodulation Reference Signal (DMRS);
The UE of claim 12. The first type PUCCH is transmitted without being time-division multiplexed with the DMRS.
The UE of claim 15. a value of k that is one of {0, 1, 2} based on a first set of the four sets;
a value of k in the range {3, 4, 5} based on a second set of the four sets;
a value of k in the range {6, 7, 8} based on a third set of the four sets;
The value of k is one of {9, 10, 11} based on a fourth of the four sets.
The UE of claim 12. 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 based on the value of the pair of two bits of the HARQ-ACK information bit value represented by two bits different from 00 is
It is a multiple of 3.
The UE of claim 12. The value of k based on the value of the two-bit pair of HARQ-ACK information bits is UE-specific in the one symbol in the time domain.
The UE of claim 12. The first type PUCCH is transmitted with a time length of one symbol.
The UE of claim 12. The α is a cyclic shift.
The UE of claim 12. 1. A method performed by a base station, comprising:
Transmitting a parameter indicating the number of symbols of a first type of PUCCH (Physical Uplink Control Channel) to a UE (User Equipment) by RRC (Radio Resource Control) signaling;
receiving a first sequence for the first type of PUCCH from the UE;
The first sequence is defined as 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 values of two-bit pairs of Hybrid Automatic Repeat Request Acknowledgement (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 indicating a Negative Acknowledgement (NACK) or 1 indicating an Acknowledgement (ACK);
Method. A method performed by a User Equipment (UE), comprising:
receiving a parameter indicating the number of symbols of a first type of PUCCH (Physical Uplink Control Channel) from a base station by RRC (Radio Resource Control) signaling;
Transmitting a first sequence for the first type of PUCCH to the base station;
The first sequence is defined as 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 values of two-bit pairs of Hybrid Automatic Repeat Request Acknowledgement (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 indicating a Negative Acknowledgement (NACK) or 1 indicating an Acknowledgement (ACK);
Method.

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