RU2763029C1 - Subscriber apparatus, base station and method for wireless communication - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: communication apparatus comprises a circuit converting hybrid automatic repeat request acknowledgement (HARQ-ACK) bits into at least one orthogonal frequency division multiplexing (OFDM) symbol adjacent to at least one OFDM symbol with demodulation reference signals (DMRS), and a transmitting apparatus transmitting HARQ-ACK bits and DMRS demodulation reference signals, wherein the position of the HARQ-ACK bit conversion is different in accordance with the DMRS reference signal conversion pattern.

EFFECT: simplified conversion of uplink control information (UCI) in a physical uplink shared uplink channel (PUSCH) in NR for the purpose of improving the productivity of the channel.

24 cl, 20 dwg

Description

State of the art

1. The field of technology to which the invention relates

The present disclosure relates to the field of wireless communications and, in particular, to a subscriber unit (UE), a base station (advanced Node B), and wireless communication techniques associated with converting uplink control information in uplink physical resources into NR (access technology based on a new radio communication standard).

2. Description of the prior art

As is known, the uplink control information (UCI) may be channel status information (CSI), hybrid automatic retransmission request acknowledgment (HARQ-ACK), or rank indicator (RI). In the long term evolution (LTE) uplink, the UCI can be transmitted (mapped) on a physical uplink control channel (PUCCH) or on a physical uplink shared channel (PUSCH). For example, FIG. 1 schematically shows an example scenario of UCI to PUSCH mapping in LTE.

In particular, in FIG. 1 shows the structure of a physical resource block (PRB) 10. The abscissa axis (T) of PRB 10 represents time (Orthogonal Frequency Division Multiplexing (OFDM) symbols), and its vertical axis (F) represents bandwidth (subcarriers). For PRB 10, the abscissa is divided into 14 sections, each of which forms an OFDM symbol in the vertical axis direction. The vertical axis is divided into 12 sections, each of which forms a subcarrier in the abscissa direction. Each small block in the PRB 10 represents a resource element (RE) and all 12x14 REs of the PRB 10 form a 1 ms subframe that includes slot 1 and slot 2 along the abscissa direction.

It should be noted that the structure of the PRB 10 shown in FIG. 1 is only an example for the convenience of explaining the present disclosure, and the present disclosure is not limited thereto. Alternatively, the PRB can also include a 12 × 7 RE in another example, or can have any other suitable structure depending on the specific requirement.

As shown in FIG. 1, there are two RE columns that are used to transmit demodulation reference signals (DMRS). The fourth OFDM symbol in each of the two slots in the identical subframe is used to transmit the DMRS as shown by the REs filled with slanted lines to the left. Essentially, in LTE, different types of UCIs are allocated at the edges of the allocated PUSCH. As shown in FIG. 1, the CSI is transmitted from above the PRB 10 as shown by the REs filled with lines tilted to the right. In this case, the HARQ-ACK and the RI are transmitted from below the PRB 10, as shown by the REs filled with vertical lines and horizontal lines, respectively. The remainder of the PRB 10 is used to transmit a portion of the data as shown by the blank REs.

In addition, based on priority, HARQ-ACKs are sent on the REs adjacent to the REs in which the DMRSs are mapped, while the RIs are near the HARQ-ACK and slightly further from the DMRS. In addition, PUSCH is fully rate matched with CSI and RE RI, but HARQ-ACK REs are punctured. Thus, the processing is different between CSI / RI and HARQ-ACK.

In LTE, since the DMRS pattern is fixed, the UCI mapping is fixed. In NR / 5G, UCI to PUSCH is still under discussion.

The essence of the invention

One non-limiting and exemplary embodiment simplifies the conversion of UCI to PUSCH to NR to avoid RS collision and improve channel performance.

In a first general aspect of the present disclosure, a subscriber unit is provided, comprising: a circuit configured to convert, in physical resource blocks (PRBs) for a physical uplink shared channel (PUSCH), uplink control information (UCI) into one or more available resource units according to their distances with resource units in which the reference signals are converted in one or more of the time domain, frequency domain, and spatial domain; and a transmitter configured to transmit UCI and reference signals in PUSCH over PRB to the base station.

In a second general aspect of the present disclosure, a base station is provided, comprising: a receiver configured to receive uplink control information (UCI) and physical uplink shared channel (PUSCH) reference signals over physical resource blocks (PRBs) for PUSCH from a subscriber unit; and a circuit configured to inversely transform UCI and reference signals from respective resource elements to PRBs according to an inverse transform rule that indicates that UCIs are mapped, to PRBs, into one or more available resource elements according to their distances with resource elements in which the reference signals are converted in one or more of the time domain, frequency domain, and spatial domain.

In a third general aspect of the present disclosure, there is provided a wireless communication method for a subscriber unit, comprising: mapping, in physical resource blocks (PRBs) for a physical uplink shared channel (PUSCH), uplink control information (UCI) into one or more available resource units according to their distances with resource units in which reference signals are converted in one or more of a time domain, a frequency domain, and a spatial domain; and transmitting the UCI and reference signals in PUSCH over PRB to the base station.

In a fourth general aspect of the present disclosure, there is provided a wireless communication method for a base station, comprising: receiving uplink control information (UCI) and reference signals on a physical uplink shared channel (PUSCH) over physical resource blocks (PRBs) for PUSCH from a subscriber device; and inverse mapping of the UCI and reference signals from the respective resource units to the PRB according to the inverse mapping rule, which indicates that the UCI is mapped, to the PRB, to one or more available resource units according to their distances with the resource units in which the reference signals are mapped in one or more of the time domain, frequency domain and spatial domain.

It should be noted that general or specific embodiments may be implemented as a system, method, integrated circuit, computer program, storage medium, or any selective combination of the above.

Additional benefits and advantages of the disclosed embodiments will become apparent from the detailed description and drawings. Benefits and / or advantages may be separately obtained through various embodiments and features of the detailed description and drawings, which need not all be provided in order to obtain one or more such benefits and / or advantages.

Brief Description of Drawings

The foregoing and other features of the present disclosure should become more apparent from the following description and the accompanying claims when taken in conjunction with the accompanying drawings. Given that these drawings illustrate only a few embodiments in accordance with the disclosure and therefore should not be considered as limiting its scope, the disclosure is described with additional specificity and detail through the use of the accompanying drawings, in which:

FIG. 1 schematically shows an example scenario of UCI to PUSCH mapping in LTE;

FIG. 2 (A) - (B) schematically show two possible configurations for DMRS in NR;

FIG. 3 illustrates a block diagram of a portion of a subscriber unit according to an embodiment of the present disclosure;

FIG. 4 (A) - (C) schematically show some example scenarios of UCI mapping to PUSCH to NR according to an embodiment of the present disclosure;

FIG. 5 schematically shows an example scenario of UCI mapping to PUSCH to NR according to an embodiment of the present disclosure;

FIG. 6 schematically shows an example scenario for converting various types of UCI to PUSCH to NR according to an embodiment of the present disclosure;

FIG. 7 schematically shows an example scenario for converting various types of UCI to PUSCH to NR according to an embodiment of the present disclosure;

FIG. 8 schematically shows an exemplary scenario for converting various types of UCI to PUSCH to NR in the case of DMRS with a load at the start and additional DMRSs according to an embodiment of the present disclosure;

FIG. 9 schematically shows an exemplary scenario for converting various types of UCI to PUSCH to NR in the case of DMRS with a load at the start and additional DMRSs according to an embodiment of the present disclosure;

FIG. 10 schematically shows an exemplary scenario for converting various types of UCI to PUSCH to NR in the case of DMRS with a load at the start and additional DMRSs according to an embodiment of the present disclosure;

FIG. 11 schematically shows an example scenario for converting UCI to PUSCH to NR in case PT-RSs are present according to an embodiment of the present disclosure;

FIG. 12 schematically shows an example scenario for converting UCI to PUSCH to NR in case PT-RSs are present according to an embodiment of the present disclosure;

FIG. 13 illustrates a block diagram of a portion of a base station according to an embodiment of the present disclosure;

FIG. 14 illustrates a block diagram of details of a subscriber unit when a CP-OFDM waveform is used for uplink transmission according to an embodiment of the present disclosure;

FIG. 15 illustrates a block diagram of details of a subscriber unit when a DFT-S-OFDM waveform is used for uplink transmission according to an embodiment of the present disclosure;

FIG. 16 illustrates a block diagram of details of a base station when a CP-OFDM waveform is used for uplink transmission according to an embodiment of the present disclosure;

FIG. 17 illustrates a block diagram of details of a base station when a DFT-S-OFDM waveform is used for uplink transmission according to an embodiment of the present disclosure;

FIG. 18 schematically shows an example of a flowchart of a communication method between a base station and a terminal according to an embodiment of the present disclosure;

FIG. 19 illustrates a flow diagram of a wireless communication method for a subscriber unit according to an embodiment of the present disclosure; and

FIG. 20 illustrates a flow diagram of a wireless communication method for a base station according to an embodiment of the present disclosure.

Detailed description of the invention

In the following detailed description, please refer to the accompanying drawings, which are part of it. Throughout the drawings, like reference numerals typically identify like components unless context dictates otherwise. It should be readily understood that aspects of the present disclosure may be assembled, interchanged, combined, and designed in a variety of different configurations, all of which are explicitly contemplated and form part of this disclosure.

As described above with reference to FIG. 1, in LTE, the DMRS pattern is fixed. However, in NR, based on conventions, the DMRS pattern can vary. FIG. 2 schematically shows two possible configurations for the DMRS in NR.

In particular, FIG. 2 (A) shows a PRB 20A that corresponds, for example, to the case of a comb configuration. As shown in FIG. 2 (A), the Physical Downlink Control Channel (PDCCH) is mapped to the first two symbols in the PRB 20A, i. E. characters 0, 1, as shown by RE, filled with transverse lines. The DMRS are mapped to symbol 2 in the time domain and subcarriers 1, 3, 5, 7, 9, and 11 in the frequency domain, as shown by the REs filled with slanted lines to the left. Here, the symbol number on the abscissa axis (T) and the subcarrier number on the vertical axis (F) are indicated to easily identify the RE positions in the PRB.

In contrast, FIG. 2 (B) shows a PRB 20B that corresponds, for example, to the case of an OCC (Orthogonal Coverage Code) based configuration in an FD (frequency domain) of length 2. As shown in FIG. 2 (B), the PDCCH is mapped to the first two symbols in the PRB 20B, i.e. characters 0, 1, as shown by RE, filled with transverse lines. The DMRS are mapped to symbol 2 in the time domain and consecutive subcarriers 2 and 3, 6 and 7 and 10 and 11 in the frequency domain, as shown by the REs filled with slanted lines to the left.

It can be seen that since the configurations of FIG. 2 (A) and FIG. 2 (B) are different from each other, their DMRS patterns are different from each other, respectively. Thus, the DMRS pattern can vary based on different configurations in the NR, which has an impact on the UCI to NR conversion. It should be noted that the no-signal interval between PDCCH and PUSCH is ignored here for convenience of explanation.

Currently in LTE, the uplink waveform is Discrete Fourier Transform Spread Spectrum (DFT-S-OFDM) orthogonal frequency division multiplexing, while orthogonal frequency division multiplexing based on cyclic prefix (CP-OFDM) is used as the downlink waveform. However, in NR, these two waveforms are supported for the uplink. In addition to various configurations, as shown in FIG. 2, different waveforms also have an impact on the UCI to NR conversion. The principles of DFT-S-OFDM and CP-OFDM are known in the prior art and are therefore not explained in detail herein. The main difference is whether there is an additional DFT operation or not.

In addition, in the NR, the phase tracking reference signal (PT-RS) is adjusted and is a new RS compared to LTE. PT-RS is supported on the uplink and downlink in NR and is used to compensate for the common phase error (CPE). The PT-RS pattern can also vary based on configuration and / or an implicit indicator through some of the fields in the downlink control information (DCI). For example, assuming the UE has to transmit two layers, with layer 1 transmitted through antenna port 1 and layer 2 transmitted through antenna port 2, PT-RSs are transmitted on certain REs at layer 1 only, and REs at layer 2 corresponding to certain RE are blank. Additionally, the PT-RSs are allocated sequentially in the time domain (symbol level), in other words, the RS RTs are mapped to some sequential symbols in the time domain on the same subcarrier. A collision with PT-RS must also be considered for converting UCI to NR.

So the basic problem is how to design the UCI to PUSCH mapping for all different cases (e.g. different waveforms, different DMRS and / or PT-RS patterns, etc.) in NR, specifically with taking into account RS collision and better channel performance.

In an embodiment of the present disclosure, a subscriber unit is provided as shown in FIG. 3. FIG. 3 illustrates a block diagram of a portion of a subscriber unit 300 according to an embodiment of the present disclosure. As shown in FIG. 3, UE 300 may include a circuit 310 and a transmitter 320. Circuit 310 is configured to convert, in physical resource blocks (PRBs) for a physical uplink shared channel (PUSCH), uplink control information (UCI) to one or more available resource units according to their distances with resource units in which reference signals are converted in one or more of a time domain, a frequency domain, and a spatial domain. Transmitter 320 is configured to transmit UCI and reference signals in PUSCH over PRB to a base station.

In particular, circuit 310 implements mapping of UCI to physical resources, i. E. RE to PRB for PUSCH. For example, PRBs are similar to PRBs as shown in FIG. 1 or FIG. 2. Circuit 310 converts UCI to REs according to the distances of these REs with REs for RS transmission (e.g., DMRS and / or PT-RS) in the time domain, according to the distances of these REs with REs for RS transmission in the frequency domain, according to the distances of these REs with REs for RS transmission in the spatial domain or according to the distances of these REs with REs for RS transmission in any combination. Here, the spatial domain, for example, is associated with a multi-layer transmission case, which will be explained in more detail by way of example below.

After resource mapping by circuit 310, transmitter 320 may transmit UCI and RS in PUSCH over PRB to the base station.

By converting UCI to REs according to the distances of these REs with REs in which RSs are mapped in one or more of the time domain, frequency domain, and spatial domain, RS collision can be avoided and system performance can be improved in NR.

According to an embodiment of the present disclosure, circuitry 310 is further configured to map UCIs to one or more available resource units whose distances with resource units in which the reference signals are mapped are shortest in one or more of the time domain, frequency domain, and spatial domain. ...

In particular, circuitry 310 may map UCIs to REs whose distances from the REs for RS transmission (eg, DMRS and / or PT-RS) are shortest in the time domain, in the frequency domain, in the spatial domain, or any combination of the above. The following are specific examples of this.

According to an embodiment of the present disclosure, the reference signals comprise DMRS and the UCI is mapped by scheme 310 to identical subcarriers to the DMRS subcarriers.

For convenience of explanation, FIG. 4 schematically shows some example scenarios of UCI mapping to PUSCH to NR according to an embodiment of the present disclosure. By way of example, FIG. 4 corresponds to the case in which the CP-OFDM waveform is used and in which the DMRS pattern is the same as the DMRS pattern shown in FIG. 2 (A) for comb configuration. For example, as shown in FIG. 4 (A) - (C), in PRB 40A / 40B / 40C, the PDCCH is mapped to the first two symbols, i.e. characters 0, 1, as shown by RE, filled with transverse lines. The DMRS are mapped to symbol 2 in the time domain and subcarriers 1, 3, 5, 7, 9, and 11 in the frequency domain, as shown by the REs filled with slanted lines to the left.

FIG. 4 (A), UCI is mapped to subcarriers identical to the DMRS subcarriers, in other words, UCI is mapped to subcarriers 1, 3, 5, 7, 9, and 11 in the frequency domain. In the time domain, the UCI is mapped to two symbols adjacent to the DMRS, i.e. symbols 3, 4. In this case, the REs in which the UCI is converted are two REs whose distances from the REs in which the DMRSs are converted are the shortest in the time domain (symbol level), as shown by the REs filled with sloped lines to the right. Here, the shortest distance with REs in which the DMRS are transformed can be explained as being within two symbols in the time domain. Alternatively, the granularity for the distance, for example, can be two characters.

Advantageously, by converting the UCI to subcarriers identical to the DMRS subcarriers by the scheme 310, the delay can be reduced and better channel performance can be achieved.

The UCI conversion is not limited to the method shown in FIG. 4 (A). As shown in FIG. 4 (B), considering an RE consisting of a symbol 2 in the time domain and a subcarrier 11 in the frequency domain in which the DMRS is mapped to a PRB 40B, as an example, the UCI is mapped to adjacent two REs, i.e. in an RE, consisting of a symbol 3 in the time domain and a subcarrier 11 in the frequency domain, and in an RE, consisting of a symbol 3 in the time domain and a subcarrier 10 in the frequency domain, as shown by the REs filled with slanted lines to the right. In this case, the REs in which the UCI is transformed are two REs whose distances from the REs in which the DMRS are transformed are the shortest in the time domain and in the frequency domain (at the RE layer). Here, the shortest distance with REs in which the DMRSs are converted can be explained as a component within one RE, i.e. one symbol in the time domain and / or one subcarrier in the frequency domain. Alternatively, the granularity for the distance, for example, can be one RE.

FIG. 4 (C) additionally shows another UCI conversion method. As shown in FIG. 4 (C), also considering an RE consisting of a symbol 2 in the time domain and a subcarrier 11 in the frequency domain in which the DMRS is mapped to a PRB 40C, as an example, the UCI is mapped to adjacent two REs, i.e. in an RE, consisting of a symbol 2 in the time domain and a subcarrier 10 in the frequency domain, and in an RE, consisting of a symbol 3 in the time domain and a subcarrier 10 in the frequency domain, as shown by the REs filled with slanted lines to the right. In this case, the REs in which the UCI is transformed are two REs whose distances from the REs in which the DMRS are transformed are the shortest in the time domain and in the frequency domain (at the RE layer). Here, the shortest distance with REs in which the DMRSs are converted can be explained as a component within one RE, i.e. one symbol in the time domain and / or one subcarrier in the frequency domain. Alternatively, the granularity for the distance, for example, can be one RE.

Although both FIG. 4 (B) and FIG. 4 (C) convert UCIs to REs based on their distance from the REs for the DMRS at the RE layer, there is a difference in that FIG. 4 (B) considers the transformation in the frequency domain first, i. E. one of the two UCI REs belongs to the same subcarrier with the DMRS RE, while FIG. 4 (C) looks at the time domain transform first, i. E. one of the two REs for UCI belongs to the same symbol as RE for DMRS. In general, considering frequency domain transforms in the first place can reduce latency and thereby achieve better channel performance.

It should be noted that FIG. 4 is for explanation only, and the present disclosure is not limited thereto. As described above, the UCI mapping in any other suitable technique may be based on RE distances for the RS in one or more of the time domain, frequency domain, and spatial domain. In addition, it should be noted that the granularity of the distance can be configured by the gNB (base station) through radio resource control (RRC) signaling.

According to an embodiment of the present disclosure, the UCI mapping by the circuit 310 varies depending on the reference signal patterns.

FIG. 5 schematically shows an example scenario of UCI mapping to PUSCH to NR according to an embodiment of the present disclosure. FIG. 5 corresponds to the case in which the CP-OFDM waveform is used and in which the DMRS pattern is the same as the DMRS pattern shown in FIG. 2 (B) for a length 2 FD OCC based configuration. For example, as shown in FIG. 5 to PRB 50, the PDCCH is mapped to the first two symbols, i. E. characters 0, 1, as shown by RE, filled with transverse lines. The DMRS are mapped to symbol 2 in the time domain and consecutive subcarriers 2 and 3, 6 and 7 and 10 and 11 in the frequency domain, as shown by the REs filled with slanted lines to the left.

When comparing FIG. 5 with FIG. 4 (A) because the DMRS pattern changes from FIG. 4 (A) to FIG. 5, the UCI conversion should be varied accordingly. In particular, as shown in FIG. 5, to keep the UCI in the same subcarriers with the DMRS, the UCI is mapped to subcarriers 2 and 3, 6 and 7 and 10 and 11 in the frequency domain. In the time domain, the UCI is mapped to two symbols adjacent to the DMRS, i.e. symbols 3, 4, which are identical with FIG. 4 (A). In this case, similar to FIG. 4 (A), the REs in which the UCI is mapped are two REs whose distances from the REs in which the DMRSs are mapped are the shortest in the time domain (symbol level) as shown by the REs filled with right-sloped lines.

As described above, unlike LTE, the RS pattern can vary according to different configurations and different waveforms in the NR. Thus, the best channel performance can be achieved due to UCI conversion varying with reference patterns.

According to an embodiment of the present disclosure, a UCI contains a plurality of UCI types, and the plurality of UCI types are prioritized, respectively, and the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the UCI type is mapped, with resource elements in which the reference signals are converted.

In particular, although FIG. 4 and 5 explain UCI mapping by considering UCI as general information, in practice, UCI can be classified into several types. Additionally, by prioritizing different UCI types, the conversion of these different UCI types can also reflect their priorities. As such, the priority of the different types of UCI can be guaranteed.

More specifically, for convenience of explanation, the plurality of UCI types are assumed to comprise a hybrid automatic retransmission request (HARQ-ACK) acknowledgment, a rank indicator (RI), beam steering / recovery, and prioritized channel state information (CSI). respectively, in descending order of priority. In other words, the priority order of this UCI is as follows: HARQ-ACK -> RI -> Beam steering / recovery -> CSI. Here, beam steering / recovery is a new type of UCI designed for NR. CSI is associated with CSI, eg CQI / PMI.

According to an embodiment of the present disclosure, all of the plurality of UCI types are mapped to identical subcarriers, and the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the UCI type is mapped, with resource elements in which the reference signals are transformed into the time domain.

FIG. 6 schematically shows an example scenario for converting various types of UCI to PUSCH to NR according to an embodiment of the present disclosure. FIG. 6 corresponds to the case in which the CP-OFDM waveform is used and in which the DMRS pattern is the same as the DMRS pattern shown in FIG. 2 (B) for a length 2 FD OCC based configuration. For example, as shown in FIG. 6 to PRB 60, the PDCCH is mapped to the first two symbols, i. E. characters 0, 1, as shown by RE, filled with transverse lines. The DMRS are mapped to symbol 2 in the time domain and consecutive subcarriers 2 and 3, 6 and 7 and 10 and 11 in the frequency domain, as shown by the REs filled with slanted lines to the left.

Similarly to FIG. 5, the entire UCI is mapped to identical subcarriers with DMRS, that is, subcarriers 2 and 3, 6 and 7 and 10 and 11 in the frequency domain. Additionally, the priority order of these four UCI types is reflected by their distances from the DMRS in the time domain (symbol level). In particular, as shown in FIG. 6, since HARQ-ACK has the highest priority, it is mapped to symbol 3 in the time domain as shown by REs filled with vertical bars. Then, the RI having the second highest priority is mapped to a symbol 4 in the time domain as shown by the REs filled with horizontal lines. The third highest priority beam steering / recovery is then mapped to symbol 5 in the time domain, as shown by the dot-filled REs. Finally, the CSI (eg, CQI / PMI) having the lowest priority is mapped to symbol 6 as shown by the REs filled with right-sloped lines. From FIG. 6, it can be seen that the HARQ-ACK is closest to the DMRS in the time domain (at the symbol level), while the CSI is farthest in the DMRS in the time domain (at the symbol level).

Here, when considering all four types of UCI as a whole, the shortest distance with REs in which the DMRS are mapped can be explained as being within four symbols in the time domain. Alternatively, the granularity for the distance, for example, can be four characters. More specifically, of these four UCI types, the UCI with the highest priority is mapped to a RE whose distance is within one symbol of the DMRS RE, i.e. has the shortest distance with the DMRS RE in the time domain (at the symbol level), and the UCI with the second highest priority is mapped to a RE whose distance is within two symbols of the DMRS RE, i.e. has the second shortest distance with DMRS RE in the time domain (symbol level), etc.

As described above, by converting the entire UCI to identical DMRS subcarriers, i. E. taking into account the transformation in the frequency domain in the first place, the delay can be reduced. Meanwhile, the priority of different types of UCI can be guaranteed.

According to an embodiment of the present disclosure, the higher the priority assigned to a UCI type, the shorter the distances of one or more available resource units in which the UCI type is mapped to resource units in which reference signals are mapped in the frequency domain and in the time domain.

FIG. 7 schematically shows an example scenario for converting various types of UCI to PUSCH to NR according to an embodiment of the present disclosure. FIG. 7 corresponds to the case in which the CP-OFDM waveform is used and in which the DMRS pattern is the same as the DMRS pattern shown in FIG. 2 (A) for comb configuration. For example, as shown in FIG. 7 to PRB 70, the PDCCH is mapped to the first two symbols, i. E. characters 0, 1, as shown by RE, filled with transverse lines. The DMRS are mapped to symbol 2 in the time domain and subcarriers 1, 3, 5, 7, 9, and 11 in the frequency domain, as shown by the REs filled with slanted lines to the left.

As described above, the HARQ-ACK priority is higher than the RI priority. Thus, the HARQ-ACK is mapped to an identical subcarrier with the DMRS in the frequency domain and to a symbol adjacent to the DMRS in the time domain, as shown by the REs filled with vertical bars. The RI is then mapped to a subcarrier adjacent to the DMRS in the frequency domain and to an identical symbol with HARQ-ACK in the time domain, as shown by the REs filled with horizontal lines.

When considering HARQ-ACK and RI in general, the UCI mapping method in FIG. 7 is identical to that of FIG. 4 (B), in which the REs in which the UCI is mapped are two REs whose distances from the REs in which the DMRS are mapped are shortest in the time domain and in the frequency domain (at the RE layer). Here, the shortest distance with REs in which the DMRSs are converted can be explained as a component within one RE, i.e. one symbol in the time domain and / or one subcarrier in the frequency domain. Alternatively, the granularity for the distance, for example, can be one RE.

FIG. 7, the priority order of the two UCI types is reflected by their distances from the DMRS in the time domain and in the frequency domain (RE layer), which is different from FIG. 6. Additionally, the conversion in the frequency domain is considered first, in other words, the HARQ-ACK having a higher priority is mapped to the same subcarrier with the DMRS, the delay therefore can be reduced while the priority of the other UCI is guaranteed. In other words, of the two types of UCIs, the UCI with the higher priority is mapped to a RE whose distance is within 0 subcarriers in the frequency domain and one symbol in the time domain, i.e. has the shortest distance with a DMRS RE in the frequency domain and in the time domain (at the RE layer), while the UCI with a lower priority is converted to an RE, the distance of which is within one subcarrier in the frequency domain and one symbol in the time domain, those. has the second shortest distance with the DMRS RE in the frequency domain and in the time domain (at the RE level).

It should be noted that although only two types of the UCI shown in FIG. 7, the present disclosure is not limited thereto. Likewise, when more UCI types are provided, their order of priority can also be reflected by their distances from the DMRS in the time domain and in the frequency domain (at the RE layer).

Although the above is related to cases in which only loaded DMRSs are provided, converted to PRBs, the present disclosure can also be applied to cases in which only loaded DMRSs and additional DMRSs are provided.

According to an embodiment of the present disclosure, the reference signals comprise demodulation reference signals (DMRS) with a load at the beginning and additional DMRSs, and the UCI mapping for the DMRS with a load at the beginning is the same or different from the UCI mapping for the additional DMRSs.

FIG. 8 schematically shows an exemplary scenario for converting various types of UCI to PUSCH to NR in the case of DMRS with a load at the start and additional DMRSs according to an embodiment of the present disclosure. FIG. 8, it is assumed that the first three symbols in the PRB 80 are used for the control area as shown by the REs filled with transverse lines. The loaded DMRSs are initially mapped to symbols 3, 4 in the time domain and to subcarriers 5, 11 in the frequency domain, and additional DMRSs are mapped to symbols 9, 10 in the time domain and subcarriers 5, 11 in the frequency domain, as shown by RE filled with lines tilted to the left.

Taking a DMRS with a load at the start (eg, RE consisting of symbol 4 and subcarrier 11) as an example, the mapping of the various UCI types regarding it is based on distances from it in the frequency domain (at the subcarrier level). Specifically, as described above, the priority order of this UCI is: HARQ-ACK -> RI -> Beam steering / recovery -> CSI. Thus, the HARQ-ACK having the highest priority is mapped to an identical DMRS subcarrier with a load at the beginning in the frequency domain and to a symbol adjacent to a DMRS with a load at the beginning in the time domain, as shown by the RE filled with vertical bars. Then, the RI having the second highest priority is mapped to the same symbol with the HARQ-ACK in the time domain and to a subcarrier adjacent to the HARQ-ACK in the frequency domain, as shown by the RE filled with horizontal lines. Then, the beam steering / recovery having the third highest priority is mapped to an identical symbol with HARQ-ACK in the time domain and to a subcarrier adjacent to the RI in the frequency domain, as shown by the dot-filled RE. Finally, the CSI having the lowest priority is mapped to the same symbol with the HARQ-ACK in the time domain and to a subcarrier adjacent to the beam steering / recovery in the frequency domain, as shown by the RE filled with slanted lines to the right.

Thus, the priority order of these four UCI types is reflected by their distances from the DMRS with a load at the start in the frequency domain (at the subcarrier level). More specifically, the higher the priority of the UCI type, the shorter the distance of the UCI type with DMRS with loading at the beginning in the frequency domain (at the subcarrier level). As described above, the transformation in the frequency domain is considered first to reduce the delay.

As shown in FIG. 8, with respect to supplemental DMRSs, the UCI mapping is symmetric with respect to supplementary DMRSs themselves. But, the UCI mapping for supplemental DMRS is not the same as the UCI mapping for DMRS with start-up. Specifically, for an additional DMRS mapped to a RE consisting of a 9 symbol in the time domain and a subcarrier 11 in a frequency domain, the four UCI types are mapped to an 8 symbol in the time domain, while for an additional DMRS mapped to an RE consisting of symbol 10 in the time domain and subcarrier 11 in the frequency domain, the four UCI types are mapped to symbol 11 in the time domain.

FIG. 9 schematically shows an exemplary scenario for converting various types of UCI to PUSCH to NR in the case of DMRS with a load at the start and additional DMRSs according to an embodiment of the present disclosure. Similarly to FIG. 8, it is assumed that the first three symbols in the PRB 90 are used for the control area as shown by the REs filled with transverse lines. The loaded DMRSs are initially mapped to symbols 3, 4 in the time domain and to subcarriers 5, 11 in the frequency domain, and additional DMRSs are mapped to symbols 9, 10 in the time domain and subcarriers 5, 11 in the frequency domain, as shown by RE filled with lines tilted to the left.

Taking a DMRS with a load at the start (eg, a RE consisting of symbol 4 and subcarrier 11) as an example, the mapping of the various UCI types regarding it is based on the distances therewith in the frequency domain and in the time domain (at the RE layer). Specifically, as described above, the priority order of this UCI is: HARQ-ACK -> RI -> Beam steering / recovery -> CSI. Thus, the HARQ-ACK having the highest priority is mapped to an identical DMRS subcarrier with a load at the beginning in the frequency domain and to a symbol adjacent to a DMRS with a load at the beginning in the time domain, as shown by the RE filled with vertical bars. Then, the RI having the second highest priority is mapped to the same symbol with the HARQ-ACK in the time domain and to a subcarrier adjacent to the HARQ-ACK in the frequency domain, as shown by the RE filled with horizontal lines. Then, the beam steering / recovery having the third highest priority is mapped to the same HARQ-ACK subcarrier in the frequency domain and to a subcarrier adjacent to the HARQ-ACK in the frequency domain, as shown by the dot-filled RE. Finally, the CSI having the lowest priority is mapped to an identical beam steering / recovery symbol in the time domain and to a subcarrier adjacent to the beam steering / recovery in the frequency domain as shown by the RE filled with slanted lines to the right.

The UCI conversion principle in FIG. 9 is identical in principle to FIG. 7. Thus, the order of priority of these four UCI types is reflected by their distance from the DMRS with loading at the beginning in the frequency domain and in the time domain (at the RE level). As described above, the transformation in the frequency domain is considered first to reduce the delay.

Similarly to FIG. 8, FIG. 9, regarding the supplemental DMRSs, the UCI mapping is symmetric with respect to the supplemental DMRSs themselves. But, the UCI mapping for supplemental DMRS is not the same as the UCI mapping for DMRS with start-up.

FIG. 10 schematically shows an exemplary scenario for converting various types of UCI to PUSCH to NR in the case of DMRS with a load at the start and additional DMRSs according to an embodiment of the present disclosure. FIG. 10 corresponds to the case in which the CP-OFDM waveform is used and in which the loaded DMRS pattern at the beginning is similar to the loaded DMRS pattern shown in FIG. 2 (B) for a length 2 FD OCC based configuration. For example, as shown in FIG. 10 to PRB 100, the PDCCH is mapped to the first two symbols, i. E. characters 0, 1, as shown by RE, filled with transverse lines. The loaded DMRS are initially mapped to symbol 2 in the time domain and successive subcarriers 2 and 3, 6 and 7 and 10 and 11 in the frequency domain, as shown by the REs filled with slanted lines to the left. In addition, there are additional DMRS mapped to symbol 9 in the time domain and consecutive subcarriers 2 and 3, 6 and 7 and 10 and 11 in the frequency domain in PRB 100.

With respect to the DMRS with load at the beginning, since the mapping of the various UCI types is identical to the mapping in FIG. 6, its details are no longer provided to avoid redundancy. In contrast to FIG. 8 and 9, in FIG. 10, the UCI mapping for supplemental DMRS is identical to the UCI mapping for DMRS with start-up.

Although the examples described above only show the DMRS as the RS, the present disclosure is not limited thereto. Usually, both DMRS and PT-RS are present in the NR. It should be noted that what kinds of RSs are present can be configured at the base station.

According to an embodiment of the present disclosure, the reference signals comprise demodulation reference signals (DMRS) and phase tracking reference signals (PT-RS), and the UCI is converted by the circuit 310 only at the layer transmitting the PT-RS in the case of multilayer transmission.

FIG. 11 schematically shows an example scenario for converting UCI to PUSCH to NR in case PT-RSs are present according to an embodiment of the present disclosure. FIG. 11 corresponds to multi-layer transmission. As described above, PT-RSs do not need to be transmitted at all layers in multilayer transmission. Here, it is assumed that the UE 300 transmits two layers in total, as shown in FIG. 11. For each layer, the PDCCH and DMRS configurations are identical to those in FIG. 2 (A), whereby their details are not explained here to avoid redundancy.

It is also assumed that only layer 1 transmits the PT-RS as shown by the REs filled with dots in FIG. 11. In this case, the UCI is only converted at level 1 to obtain better phase error compensation. Here, several levels represent a spatial area. This example shows that the UCI mapping is also distance based with the PT-RS in the spatial domain (at the level of the layers).

It should be noted that although UCI is mapped to REs that are closer to REs in which DMRSs are mapped than to REs in which PT-RSs are mapped in time domain and / or frequency domain as shown at layer 1 in FIG. 11, the present disclosure is not limited thereto. UCI can also be mapped to REs that are closer to REs in which PT-RSs are mapped than to REs in which DMRSs are mapped in time domain and / or frequency domain. The UCI conversion must be determined taking into account both delay and phase error compensation.

According to an embodiment of the present disclosure, UCI is mapped by scheme 310 only to PRBs having PT-RSs.

FIG. 12 schematically shows an example scenario for converting UCI to PUSCH to NR in case PT-RSs are present according to an embodiment of the present disclosure. FIG. 12, the PDCCH and DMRS configurations are identical to those in FIG. 2 (A), whereby their details are not explained here to avoid redundancy.

As is known, PT-RSs may not be transmitted in all PRBs. Here, it is assumed that the UE 300 transmits the PT-RS in PRB 1 but not in PRB 2 as shown in FIG. 12. Thus, UCI is converted only to PRB 1 and not to PRB 2 in order to obtain better phase error compensation.

According to an embodiment of the present disclosure, in the cases of FIGS. 11 and 12, Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) or Discrete Fourier Transform Spread Spectrum Spread Spectrum (DFT-S-OFDM) orthogonal frequency division multiplexing (CP-OFDM), in which the PT-RSs are type "before DFT", used in PUSCH.

Specifically, as is known, when DFT-S-OFDM in which PT-RSs are of post-DFT type is used in PUSCH, DMRS and PT-RS are inserted after DFT processing, whereby the operations of FIG. 11 and 12 are not applicable. In contrast, when the DFT-S-OFDM in which the PT-RSs are of the pre-DFT type is used in the PUSCH, the PT-RS is inserted before the DFT processing, whereby the operations of FIG. 11 and 12 are applicable.

According to an embodiment of the present disclosure, in the frequency domain, the UCI is evenly distributed across the PRB for PUSCH, or is top and bottom centralized with respect to the PRB for PUSCH.

In particular, FIG. 4-12 show cases in which the UCI is evenly distributed across the PRB in the frequency domain; however, the present disclosure is not limited to this. The UCI can also be top and bottom centralized with respect to the PRB for PUSCH to NR, similar to the UCI mapping shown in FIG. 1 for LTE.

It should be noted that the UCI mapping rule accommodated in scheme 310 may be fixed in advance, or may be configured semi-statically or dynamically by the base station.

In addition, although the above drawings include PDCCH regions or control regions in a PRB, the present disclosure is not limited thereto, and whether or not PDCCH regions or control regions are present does not affect the present disclosure.

The above describes the UE 300 in detail with reference to FIG. 3-12. For UE 300, by mapping UCI to REs according to the distances of these REs with REs in which RSs are mapped in one or more of time domain, frequency domain, and spatial domain, RS collision can be avoided and system performance can be improved in NR.

In another embodiment of the present disclosure, a base station is provided as shown in FIG. 13. FIG. 13 illustrates a block diagram of a portion of a base station 1300 according to an embodiment of the present disclosure. As shown in FIG. 13, base station 1300 includes a receiver 1310 and a circuitry 1320. Receiver 1310 is configured to receive uplink control information (UCI) and physical uplink shared channel (PUSCH) reference signals by physical resource blocks (PRBs) ) for PUSCH from the subscriber unit. The circuit 1320 is configured to inversely convert UCI and reference signals from respective resource elements to PRBs according to an inverse mapping rule that indicates that UCIs are converted, to PRBs, into one or more available resource elements according to their distances with resource elements in which the reference the signals are converted in one or more of the time domain, frequency domain, and spatial domain. For example, the subscriber unit may be a UE 300 as shown in FIG. 3.

According to an embodiment of the present disclosure, the inverse transform rule further indicates that the UCI is mapped to one or more available resource units whose distances from the resource units in which the reference signals are mapped are shortest in one or more of the time domain, frequency domain, and spatial area.

According to an embodiment of the present disclosure, the reference signals comprise demodulation reference signals (DMRS) and phase tracking reference signals (PT-RS), and the inverse transform rule further indicates that the UCI is converted only at the layer transmitting the PT-RS in the case of multi-layer transmission. ...

According to an embodiment of the present disclosure, the inverse mapping rule further indicates that the UCI is mapped only to PRBs having PT-RSs.

According to an embodiment of the present disclosure, cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM) or discrete Fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-S-OFDM), in which PT- RS are pre-DFT type used in PUSCH.

According to an embodiment of the present disclosure, the reference signals comprise demodulation reference signals (DMRS), and the inverse transform rule further indicates that the UCI is mapped to subcarriers identical to the DMRS subcarriers.

According to an embodiment of the present disclosure, the UCI mapping varies depending on the reference signal patterns.

According to an embodiment of the present disclosure, a UCI contains a plurality of UCI types, and the plurality of UCI types are prioritized, respectively, and the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the UCI type is mapped, with resource elements in which the reference signals are converted.

According to an embodiment of the present disclosure, the inverse mapping rule further indicates that all of the plurality of UCI types are mapped to identical subcarriers, and that the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the UCI type is mapped. , with resource elements in which the reference signals are converted, in the time domain.

According to an embodiment of the present disclosure, the inverse mapping rule further indicates that the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource units in which the UCI type is mapped to resource units in which reference signals are mapped to frequency. area and in the time domain.

According to an embodiment of the present disclosure, the plurality of UCI types comprise a hybrid automatic retransmission request (HARQ-ACK) acknowledgment, a rank indicator (RI), beam steering / recovery, and prioritized channel state information (CSI), respectively, in descending order of priority.

According to an embodiment of the present disclosure, the reference signals comprise demodulation reference signals (DMRS) with a load at the beginning and additional DMRSs, and the UCI mapping for the DMRS with a load at the beginning is the same or different from the UCI mapping for the additional DMRSs.

According to an embodiment of the present disclosure, in the frequency domain, the UCI is evenly distributed across the PRB for PUSCH, or is top and bottom centralized with respect to the PRB for PUSCH.

For BS 1300, by mapping UCI to REs according to the distances of these REs with REs in which RSs are mapped in one or more of time domain, frequency domain, and spatial domain, RS collision can be avoided and system performance can be improved in NR.

FIG. 14 illustrates a block diagram of details of subscriber unit 1400 when a CP-OFDM waveform is used for uplink transmission according to an embodiment of the present disclosure. As shown in FIG. 14, subscriber unit 1400 may include circuitry 310, transmitter 320, antenna 1405, and receiver 1406. Circuitry 310 of UE 1400 may include encoder 1401, modulator 1402, resource transform unit 1403, and IFFT (Inverse Fast Fourier Transform ) for uplink transmission. In addition, UE 1400 circuitry 310 may further include an FFT (Fast Fourier Transform) block 1407, an inverse resource transform block 1408, a demodulator 1409, and a decoder 1410 for downlink reception.

Of these constituent elements, circuit 310 functions primarily as circuit 310 shown in FIG. 3, and the transmitter 320 functions primarily as the transmitter 320 shown in FIG. 3. Thus, elements having functions similar to those in FIG. 3 are labeled identically and are not described repeatedly herein for brevity and clarity.

An encoder 1401 encodes transmission data and outputs the encoded data to a modulator 1402. The modulator 1402 modulates the encoded data and outputs the modulated data to a resource conversion unit 1403.

Resource conversion unit 1403 converts modulated data to RE for data transmission to PRB for PUSCH, and converts RS (eg, DMRS and / or PT-RS) to RE for RS to PRB. In addition, the resource mapping unit 1403 transforms, in PRBs for PUSCH, the UCIs into one or more available REs according to their RE distances, in which the RSs are mapped in one or more of the time domain, frequency domain, and spatial domain. Above, a detailed UCI conversion operation is described in detail with reference to FIG. 4-12, whereby its details are omitted for the sake of clarity and brevity.

The IFFT unit 1404 performs IFFT processing on a plurality of subcarriers in the PRB into which the data, RS and UCI are converted, and outputs the IFFT-processed signals to the transmitter 320. The transmitter 320 outputs the signals to the base station via the antenna 1405.

Receiver 1406 receives downlink signals transmitted from the base station via antenna 1405. Since only the CP-OFDM waveform is used for downlink transmission to NR, FFT block 1407, inverse resource transform block 1408, demodulator 1409, and decoder 1410 are used to perform signal processing sequence for downlink signals received by receiver 1406, and finally obtains the received data. It should be noted that since the operations of FFT block 1407, inverse resource transform block 1408, demodulator 1409, and decoder 1410 are known to those skilled in the art, their details are not explained here in order to avoid confusion with respect to the inventive aspects of the present disclosure.

It should be noted that although FIG. 14 shows parts, i.e. encoder 1401, modulator 1402, resource transform block 1403, IFFT block 1404, FFT block 1407, inverse resource transform block 1408, demodulator 1409, and decoder 1410 are within circuit 310, this is only an example and not limitation. In fact, for example, one or more integrated parts can be detached from the circuit 310 depending on specific requirements.

FIG. 15 illustrates a block diagram of details of subscriber unit 1500 when a DFT-S-OFDM waveform is used for uplink transmission in accordance with an embodiment of the present disclosure. As shown in FIG. 15, subscriber unit 1500 may include circuitry 310, transmitter 320, antenna 1405, and receiver 1406. Circuitry 310 of UE 1500 may further include encoder 1401, modulator 1402, resource transform block 1503, DFT block 1550, and IFFT- block 1404 for uplink transmission. In addition, circuit 310 of UE 1500 may further include an FFT 1407, an inverse resource mapper 1408, a demodulator 1409, and a decoder 1410 for downlink reception.

Of these constituent elements, circuit 310 functions primarily as circuit 310 shown in FIG. 3, the transmitter 320 functions primarily as the transmitter 320 shown in FIG. 3. Thus, elements having functions similar to those in FIG. 3 are labeled identically and are not described repeatedly herein for brevity and clarity. Similarly, since the operations of encoder 1401, modulator 1402, IFFT block 1404, FFT block 1407, inverse resource transform block 1408, demodulator 1409, and decoder 1410 are identical to those shown in FIG. 14, elements having functions similar to those of FIG. 14 are marked identically and are not described again herein for brevity and clarity. The difference between FIG. 15 from FIG. 14 consists of a resource transform block 1503 and a new added DFT block 1550, and these two blocks are described below.

When DFT-S-OFDM, in which PT-RSs are of the pre-DFT type, is used in PUSCH, resource conversion unit 1503 converts modulated data from modulator 1402 to RE for data transmission to PRB for PUSCH, and converts PT-RS to RE for PT-RS in PRB. In addition, the resource mapping unit 1503 transforms, in PRBs for PUSCH, the UCIs into one or more available REs according to their RE distances, in which the RSs are mapped in one or more of the time domain, frequency domain, and spatial domain. Above, a detailed UCI conversion operation is described in detail with reference to FIG. 4-12, whereby its details are omitted for the sake of clarity and brevity.

The DFT block 1550 performs DFT processing on a plurality of subcarriers in the PRB into which the data, PT-RS and UCI are converted, and outputs the DFT-processed signals to the IFFT block 1404. After DFT processing by the DFT block 1550, DMRS are inserted (converted) to RE for DMRS to PRB after DFT processing. Then, the IFFT block 1404 performs IFFT processing on a plurality of subcarriers in the PRB into which the data, RS (including DMRS and PT-RS) and UCI are converted, and outputs the IFFT-processed signals to the transmitter 320. The transmitter 320 outputs signals to the base station via antenna 1405.

When the DFT-S-OFDM in which the PT-RS is the post-DFT type is used in the PUSCH, the resource conversion unit 1503 converts the modulated data from the modulator 1402 to RE to transmit data to the PRB for PUSCH. In addition, the resource conversion unit 1503 converts, in PRBs for PUSCH, the UCIs into one or more available REs according to their RE distances, in which the RSs (eg, DMRS and / or PT-RS) are converted in one or more of the time domain, frequency domain and spatial domain.

The DFT block 1550 performs DFT processing on a plurality of subcarriers in the PRB to which the data and UCI are mapped, and outputs the DFT-processed signals to the IFFT block 1404. After DFT processing, by the DFT block 1550, both the DMRS and the PT -RS are inserted (converted) into REs for them in PRB after DFT processing. Then, the IFFT block 1404 performs IFFT processing on a plurality of subcarriers in the PRB into which the data, RS (including DMRS and PT-RS) and UCI are converted, and outputs the IFFT-processed signals to the transmitter 320. The transmitter 320 outputs signals to the base station via antenna 1405.

Note that, as described above, since PT-RSs are inserted after DFT processing, when DFT-S-OFDM in which PT-RSs are of the post-DFT type is used in PUSCH, the UCI transform operations shown in FIG. ... 11 and 12 are not suitable in this case. The UCI transform operations shown in FIG. 4-10 are still applicable in this case, and since they are described in detail above, their details are omitted for the sake of transparency and brevity.

It should be noted that although FIG. 15 shows parts, i.e. encoder 1401, modulator 1402, resource transform block 1503, DFT block 1550, IFFT block 1404, FFT block 1407, inverse resource transform block 1408, demodulator 1409, and decoder 1410 are within circuit 310, this is just an example and not limitation. In fact, for example, one or more integrated parts can be detached from the circuit 310 depending on specific requirements.

FIG. 16 illustrates a block diagram of details of base station 1600 when a CP-OFDM waveform is used for uplink transmission according to an embodiment of the present disclosure. As shown in FIG. 16, base station 1600 may include a receiver 1310, a circuit 1320, a transmitter 1605, and an antenna 1606. BS circuit 1320 1600 may further include an FFT (Fast Fourier Transform) block 1607, an inverse resource transform block 1608, a demodulator 1609, and decoder 1610 for uplink reception. In addition, BS 1600 circuitry 1320 may further include an encoder 1601, a modulator 1602, a resource transform block 1603, and an IFFT block 1604 for downlink transmission.

Of these constituent elements, the receiver 1310 functions primarily as the receiver 1310 shown in FIG. 13, and the circuit 1320 functions primarily as the circuit 1320 shown in FIG. 13. Thus, elements having functions similar to those in FIG. 13 are marked identically and are not described again herein for brevity and clarity.

Receiver 1310 receives from antenna 1606 UCI and RS (eg, DMRS and / or PT-RS) in PUSCH over PRB for PUSCH from a subscriber unit (eg, UE 1400, as shown in FIG. 14). Since the signals received by the receiver 1310 are FFT-processed signals transmitted from the UE, the FFT block 1607 performs FFT processing on the received signals and outputs the FFT-processed signals to the inverse resource mapping block 1608.

The inverse resource mapping unit 1608 converts the UCIs and RSs from the corresponding REs to PRBs according to the inverse mapping rule, which indicates that the UCI is mapped, to PRBs, to one or more available REs according to their distances from the REs in which RSs are mapped to one or more from time domain, frequency domain and spatial domain. Obviously, the inverse resource mapping block 1608 also inversely transforms the data from the RE for data transmission to the PRB.

Demodulator 1609 receives inverse-transformed data from inverse resource transform block 1608, demodulates the inverse-transformed data, and outputs the demodulated data to a decoder 1610. Decoder 1610 decodes the demodulated data from demodulator 1609 and obtains received data.

Since only the CP-OFDM waveform is used for downlink transmission in NR, encoder 1601, modulator 1602, resource transform block 1603, and IFFT block 1604 are used to generate downlink signals to be transmitted by the transmitter. 1605. Transmitter 1605 then transmits downlink signals to subscriber equipment (e.g., UE 300, UE 1400) via antenna 1606. It should be noted that since the operations of encoder 1601, modulator 1602, resource transform block 1603 and IFFT block 1604 are known in the art. in the art, their details are not explained here to avoid confusion regarding the inventive aspects of the present disclosure.

Above, a detailed UCI conversion operation is described in detail with reference to FIG. 4-12, whereby its details are omitted for the sake of clarity and brevity. It should be noted that although FIG. 16 shows parts, i.e. encoder 1601, modulator 1602, resource transform block 1603, IFFT block 1604, FFT block 1607, inverse resource transform block 1608, demodulator 1609, and decoder 1610 are within circuit 1320, this is only an example and not a limitation. In fact, for example, one or more integrated parts can be separated from the circuit 1320 depending on specific requirements.

FIG. 17 illustrates a block diagram of details of a base station 1700 when a DFT-S-OFDM waveform is used for uplink transmission according to an embodiment of the present disclosure. As shown in FIG. 17, base station 1700 may include a receiver 1310, a circuit 1320, a transmitter 1605, and an antenna 1606. BS circuit 1320 1700 may further include an FFT block 1607, an IDFT (Inverse Discrete Fourier Transform) block 1760, an Inverse Discrete Fourier Transform block 1608. resource transformations, a demodulator 1609, and a decoder 1610 for uplink reception. In addition, BS 1700 circuitry 1320 may further include an encoder 1601, a modulator 1602, a resource transform block 1603, and an IFFT block 1604 for downlink transmission.

Of these constituent elements, the receiver 1310 functions primarily as the receiver 1310 shown in FIG. 13, and the circuit 1320 functions primarily as the circuit 1320 shown in FIG. 13. Thus, elements having functions similar to those in FIG. 13 are marked identically and are not described again herein for brevity and clarity. Similarly, since the operations of encoder 1601, modulator 1602, resource transform block 1603, IFFT block 1604, FFT block 1607, inverse resource transform block 1608, demodulator 1609, and decoder 1610 are identical to those shown in FIG. 16, elements having functions similar to those of FIG. 16 are marked identically and are not described again herein for brevity and clarity. The difference between FIG. 17 from FIG. 16 is a newly added IDFT block 1760; this is because signals received from the subscriber unit (eg, UE 1500, as shown in FIG. 5) are DFT-processed at the UE side.

Specifically, after the FFT block 1607 performs FFT processing on the received signals from the UE, the IDFT block 1760 further performs IDFT processing on the FFT signals and outputs the IDFT signals to the inverse resource mapping block 1608.

The inverse resource mapping block 1608 then converts the UCIs and RSs from the corresponding REs to PRBs according to the inverse mapping rule, which indicates that the UCI is mapped, to PRBs, to one or more available REs according to their distances from the REs in which the RSs are mapped in one or more of the time domain, frequency domain, and spatial domain. Obviously, the inverse resource mapping block 1608 also inversely transforms the data from the RE for data transmission to the PRB. Demodulator 1609 receives inverse-transformed data from inverse resource transform block 1608, demodulates the inverse-transformed data, and outputs the demodulated data to a decoder 1610. Decoder 1610 decodes the demodulated data from demodulator 1609 and obtains received data.

Above, a detailed UCI conversion operation is described in detail with reference to FIG. 4-12, whereby its details are omitted for the sake of clarity and brevity. As described above, the UCI transform operations shown in FIG. 11 and 12 are not suitable in the case where DFT-S-OFDM, in which the PT-RS is the post-DFT type, is used in the PUSCH.

It should be noted that although FIG. 17 shows parts, i.e. encoder 1601, modulator 1602, resource transform block 1603, IFFT block 1604, FFT block 1607, IDFT block 1760, inverse resource transform block 1608, demodulator 1609, and decoder 1610 are within circuit 1320, this is just an example and not limitation. In fact, for example, one or more integrated parts can be separated from the circuit 1320 depending on specific requirements.

FIG. 18 schematically shows an example of a flowchart of communication between a BS 1810 and a UE 1820 according to an embodiment of the present disclosure. For example, BS 1810 may be BS 1300 as shown in FIG. 13, and UE 1820 may be UE 300 as shown in FIG. 3. More specifically, when the CP-OFDM waveform is used for the uplink in NR, BS 1810 may be BS 1600 as shown in FIG. 16, and UE 1820 may be UE 1400 as shown in FIG. 14. Otherwise, when the DFT-S-OFDM waveform is used for the uplink in NR, BS 1810 may be BS 1700 as shown in FIG. 17, and UE 1820 may be UE 1500 as shown in FIG. 15.

In step ST101, the UE 1820 connects to the BS 1810 in a connection procedure. The connection can be established by implementing a known or future development method, the details of which are omitted in this document.

In step ST102, the UE 1820 converts, in PRBs for PUSCH, the UCIs to one or more available REs according to their RE distances, in which the RSs are mapped in one or more of the time domain, frequency domain, and spatial domain. As described above, UE 1820 may include circuitry 310 similar to UE 300 shown in FIG. 3, and step ST102 may be performed by circuit 310.

In step ST103, UE 1820 transmits UCI and RS in PUSCH over PRB to BS 1810. As described above, UE 1820 may also include a transmitter 320, similar to UE 300 shown in FIG. 3, and step ST103 can be performed by the transmitter 310. Meanwhile, although not shown in FIG. 18, BS 1810 receives UCI and RS in PUSCH over PRB from UE 1820.

In step ST 104, the BS 1810 converts the UCI and RS from the corresponding REs to the PRBs according to the inverse mapping rule. The inverse transform rule indicates that the UCI is mapped, in PRBs, to one or more available REs according to their RE distances, in which the RSs are mapped in one or more of the time domain, frequency domain, and spatial domain. In other words, the inverse mapping rule tells the BS 1810 how the UCI and RS are mapped to UE-side uplink physical resources. As described above, BS 1810 may include circuitry 1320, similar to BS 1300 shown in FIG. 13, and step ST104 may be performed by circuit 1320.

It should be noted that although not shown in FIG. 18, mapping and inverse mapping of PUSCH data is obviously implemented in UE 1820 and BS 1820, respectively. Since the transformation and inverse transformation of PUSCH data are known to those skilled in the art, their details are not explained herein to avoid confusion with respect to the inventive aspects of the present disclosure.

In addition, as described above, the UCI mapping rule accommodated in the UE 1820 may be fixed in advance, i. E. known to BS 1810 and UE 1820 in advance. Alternatively, the UCI mapping rule accommodated in the UE 1820 may be configured semi-statically or dynamically by the base station. In this case, although not shown in FIG. 18, the BS 1810 may notify the UE 1820 of the UCI mapping rule through explicit signaling or implicit signaling.

In a further embodiment of the present disclosure, a wireless communication method is provided for a subscriber unit, as shown in FIG. 19. FIG. 19 illustrates a flow diagram of a wireless communication method 1900 for a subscriber unit according to an embodiment of the present disclosure. For example, wireless communication method 1900 may be applied to subscriber unit 300/1400/1500 as shown in FIG. 3, 14, 15.

As shown in FIG. 19, the wireless communication method 1900 begins in step S1901, in which, in physical resource blocks (PRBs) for the physical uplink shared channel (PUSCH), the uplink control information (UCI) is mapped to one or more available resource elements according to their distances with resource elements in which the reference signals are converted in one or more of the time domain, frequency domain, and spatial domain. Then, in step S1902, the UCI and reference signals are transmitted in PUSCH over PRB to the base station. After step S1902, the wireless communication method 1900 ends.

For wireless communication method 1900, by mapping UCI to REs according to the distances of these REs with REs in which RSs are mapped in one or more of time domain, frequency domain, and spatial domain, RS collision can be avoided and system performance can be improved in NR.

It should be noted that other technical features in subscriber unit 300, as described above, may also be included in wireless communication method 1900 and are not described herein for redundancy.

In a further embodiment of the present disclosure, a wireless communication method for a base station is provided as shown in FIG. 20. FIG. 20 illustrates a flow diagram of a wireless communication method 2000 for a base station, according to an embodiment of the present disclosure. For example, wireless communication method 2000 can be applied to base station 1300/1600/1700 as shown in FIG. 13, 16, 17.

As shown in FIG. 20, wireless communication method 2000 begins in step S2001, in which uplink control information (UCI) and reference signals are received on a physical uplink shared channel (PUSCH) on physical resource blocks (PRBs) for PUSCH from a subscriber unit. Then, in step S2002, the UCI and the reference signals are mapped back from the respective resource elements to the PRB according to the inverse mapping rule, which indicates that the UCI is mapped, to the PRB, into one or more available resource elements according to their distances with the resource elements in which the reference the signals are converted in one or more of the time domain, frequency domain, and spatial domain. After step S2002, the wireless communication method 2000 ends.

For wireless communication method 2000, by mapping UCI to REs according to the distances of these REs with REs in which RSs are mapped in one or more of the time domain, frequency domain, and spatial domain, RS collision can be avoided and system performance can be improved in NR.

It should be noted that other technical features at base station 1300, as described above, may also be included in wireless communication method 2000 and are not described herein for redundancy.

The present disclosure may be implemented in software, hardware, or software in conjunction with hardware. Each functional block used in the description of each embodiment above can be implemented by the LSI as an integrated circuit, and each process described in each embodiment can be controlled by the LSI. They can be individually configured as microcircuits, or a single microcircuit can be configured to include part or all of the functional blocks. They can include data input and output associated with them. LSI may be referred to here as IC, system LSI, super-LSI, or ultra-LSI depending on the difference in the degree of integration. However, the technology for realizing an integrated circuit is not limited to LSI, and can be implemented using a dedicated circuit or a general purpose processor. In addition, an FPGA (Field Programmable Gate Array) can be used, which can be programmed after the LSI is manufactured, or a reconfigurable processor, in which the connections and settings of the circuit elements located inside the LSI can be reconfigured.

It should be noted that the present disclosure is intended for various changes or modifications by those skilled in the art based on the explanation provided in the detailed description and known techniques without departing from the content and scope of the present disclosure, and such changes and uses fall within the scope for which protection is requested. In addition, within the range without departing from the content of the disclosure, the constituent elements of the above-described embodiments may be arbitrarily combined.

Embodiments of the present disclosure may at least provide the following subjects of the invention.

(one). Subscriber device containing:

- a scheme configured to convert, in physical resource blocks (PRBs) for a physical uplink shared channel (PUSCH), uplink control information (UCI) into one or more available resource units according to their distances with resource units, into which reference signals are converted in one or more of the time domain, frequency domain, and spatial domain; and

- a transmitter configured to transmit UCI and reference signals in PUSCH over PRB to a base station.

(2). The subscriber device according to (1), in which the circuit is further configured to convert the UCI into one or more available resource units, the distances of which with the resource units in which the reference signals are converted are the shortest in one or more of the time domain, frequency domain and spatial area.

(3). The subscriber unit according to (1), in which the reference signals comprise demodulation reference signals (DMRS) and phase tracking reference signals (PT-RS), and the UCI is converted only at the layer transmitting the PT-RS in the case of multi-layer transmission.

(4). Subscriber unit according to (3), in which UCI is converted only to PRBs having PT-RS.

(5). A subscriber unit according to (3) or (4), wherein cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM) or discrete fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-S-OFDM) ), in which the PT-RS are pre-DFT type, is used in PUSCH.

(6). A subscriber unit according to (1), in which the reference signals comprise demodulation reference signals (DMRS) and the UCI is mapped to subcarriers identical to the DMRS subcarriers.

(7). A subscriber unit according to (1), in which the UCI conversion varies depending on the reference signal patterns.

(eight). A subscriber unit according to (1), in which the UCI contains a plurality of UCI types, and the plurality of UCI types are prioritized, respectively, and

- in this case, the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the UCI type is mapped to the resource elements in which the reference signals are mapped.

(9). A subscriber unit according to (8), in which all of the plurality of UCI types are mapped to identical subcarriers, and

- in this case, the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource units in which the UCI type is mapped to the resource units in which the reference signals are mapped in the time domain.

(10). A subscriber unit according to (8), in which the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource units in which the UCI type is mapped to resource units in which the reference signals are mapped in the frequency domain and in the time domain.

(eleven). A subscriber unit according to any one of (8) to (10), wherein the plurality of UCI types comprise a hybrid automatic repeat request (HARQ-ACK) acknowledgment, a rank indicator (RI), beam steering / recovery, and channel state information (CSI) , which are prioritized, respectively, in descending order of priority.

(12). The subscriber unit according to (1), in which the reference signals comprise demodulation reference signals (DMRS) with a load at the beginning and additional DMRS, and the UCI conversion for the DMRS with a load at the beginning is the same or different from the UCI conversion for the additional DMRS.

(thirteen). The subscriber unit according to (1), in which in the frequency domain, the UCI is evenly distributed across the PRB for PUSCH, or is centralized above and below with respect to the PRB for PUSCH.

(14). Base station containing:

- a receiver configured to receive uplink control information (UCI) and physical uplink shared channel (PUSCH) reference signals on physical resource blocks (PRBs) for PUSCH from the subscriber unit; and

- a circuit configured to inversely transform UCI and reference signals from respective resource elements to PRBs according to an inverse transform rule that indicates that UCIs are mapped, to PRBs, into one or more available resource elements according to their distances with resource elements in which the reference signals are converted in one or more of the time domain, frequency domain, and spatial domain.

(15). The base station according to (14), in which the inverse transform rule further indicates that the UCI is mapped to one or more available resource units, the distances of which with the resource units in which the reference signals are mapped are shortest in one or more of the time domain, frequency area and spatial area.

(sixteen). The base station according to (14), in which the reference signals comprise demodulation reference signals (DMRS) and phase tracking reference signals (PT-RS), and the inverse transform rule further indicates that the UCI is converted only at the level transmitting the PT-RS in the case of multilevel transmission.

(17). The base station according to (16), in which the inverse transform rule further indicates that the UCI is mapped only to PRBs having PT-RSs.

(eighteen). A base station according to (16) or (17), in which cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM) or discrete fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-S-OFDM) ), in which the PT-RS are pre-DFT type, is used in PUSCH.

(nineteen). The base station according to (14), in which the reference signals comprise demodulation reference signals (DMRS), and the inverse transform rule further indicates that the UCI is mapped to subcarriers identical to the DMRS subcarriers.

(twenty). The base station according to (14), in which the UCI mapping varies depending on the patterns of the reference signals.

(21). A base station according to (14), in which the UCI contains a plurality of UCI types, and the plurality of UCI types are prioritized, respectively, and

- in this case, the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the UCI type is mapped to the resource elements in which the reference signals are mapped.

(22). The base station according to (21), in which the inverse transform rule further indicates that all of the plurality of UCI types are mapped to identical subcarriers, and that the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the type The UCI is mapped, with resource elements in which the reference signals are mapped, in the time domain.

(23). The base station according to (21), in which the inverse transform rule further indicates that the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource units in which the UCI type is mapped, with resource units in which the reference signals are mapped in the frequency domain and in the time domain.

(24). The base station according to any one of (21) to (23), wherein the plurality of UCI types comprise a hybrid automatic repeat request (HARQ-ACK) acknowledgment, a rank indicator (RI), beam steering / recovery, and channel state information (CSI) , which are prioritized, respectively, in descending order of priority.

(25). The base station according to (14), in which the reference signals comprise demodulation reference signals (DMRS) with a load at the beginning and additional DMRS, and the UCI conversion for the DMRS with a load at the beginning is the same or different from the UCI conversion for the additional DMRS.

(26). The base station according to (14), in which in the frequency domain, the UCI is evenly distributed across the PRB for PUSCH, or is centralized up and down with respect to the PRB for PUSCH.

(27). A wireless communication method for a subscriber device, comprising:

- mapping, in physical resource blocks (PRBs) for the physical uplink shared channel (PUSCH), uplink control information (UCI) to one or more available resource units according to their distances with resource units in which the reference signals are mapped to one or more of a time domain, a frequency domain, and a spatial domain; and

- transmission of UCI and reference signals in PUSCH over PRB to the base station.

(28). The wireless communication method according to (27), wherein said mapping, in physical resource blocks (PRBs) for a physical uplink shared channel (PUSCH), uplink control information (UCI), into one or more available resource elements according to their distances with resource elements in which reference signals are converted in one or more of the time domain, frequency domain, and spatial domain, comprises:

- mapping the UCI into one or more available resource units, the distances of which with the resource units in which the reference signals are mapped are the shortest in one or more of the time domain, frequency domain, and spatial domain.

(29). The wireless communication method according to (27), wherein the reference signals comprise demodulation reference signals (DMRS) and phase tracking reference signals (PT-RS), and the UCI is converted only at the layer transmitting the PT-RS in the case of multilayer transmission.

(thirty). The wireless communication method according to (29), wherein the UCI is mapped only to PRBs having PT-RSs.

(31). The wireless communication method according to (29) or (30), wherein cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM) or discrete fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-S- OFDM), in which the PT-RS are pre-DFT type, is used in PUSCH.

(32). The wireless communication method of (27), wherein the reference signals comprise demodulation reference signals (DMRS) and the UCI is mapped to subcarriers identical to the DMRS subcarriers.

(33). The wireless communication method according to (27), wherein the UCI mapping varies depending on the reference signal patterns.

(34). The wireless communication method according to (27), wherein the UCI comprises a plurality of UCI types and the plurality of UCI types are prioritized, respectively, and

- in this case, the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the UCI type is mapped to the resource elements in which the reference signals are mapped.

(35). The wireless communication method of (34), wherein all of a plurality of UCI types are mapped to identical subcarriers, and

- in this case, the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource units in which the UCI type is mapped to the resource units in which the reference signals are mapped in the time domain.

(36). The wireless communication method according to (34), in which the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource units in which the UCI type is mapped, with resource units in which the reference signals are mapped in the frequency domain and in the time domain ...

(37). The wireless communication method according to any one of (34) to (36), wherein the plurality of UCI types comprise a hybrid automatic repeat request (HARQ-ACK) acknowledgment, a rank indicator (RI), beam steering / recovery, and channel state information (CSI). ), which are assigned priorities, respectively, in descending order of priority.

(38). The wireless communication method according to (27), in which the reference signals comprise demodulation reference signals (DMRS) with a load at the beginning and additional DMRS, and the UCI mapping for the DMRS with a load at the beginning is the same or different from the UCI mapping for the additional DMRS.

(39). The wireless communication method according to (27), in which, in the frequency domain, the UCI is uniformly distributed across the PRB for PUSCH, or is centralized above and below the PRB for PUSCH.

(40). A wireless communication method for a base station, comprising:

- receiving uplink control information (UCI) and reference signals on the physical uplink shared channel (PUSCH) on physical resource blocks (PRBs) for the PUSCH from the subscriber unit; and

- inverse mapping of the UCI and reference signals from the corresponding resource elements to the PRB according to the inverse mapping rule, which indicates that the UCI is mapped, to the PRB, to one or more available resource elements according to their distances with the resource elements in which the reference signals are mapped in one or more of the time domain, frequency domain, and spatial domain.

(41). The wireless communication method of (40), wherein the inverse transform rule further indicates that the UCI is mapped to one or more available resource units whose distances with the resource units in which the reference signals are mapped are shortest in one or more of the time domain, frequency domain and spatial domain.

(42). The wireless communication method according to (40), wherein the reference signals comprise demodulation reference signals (DMRS) and phase tracking reference signals (PT-RS), and the inverse transform rule further indicates that the UCI is converted only at the layer transmitting the PT-RS to case of multilevel transmission.

(43). The wireless communication method of (42), wherein the inverse transform rule further indicates that the UCI is mapped only to PRBs having PT-RSs.

(44). The wireless communication method according to (42) or (43), wherein cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM) or discrete fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-S- OFDM), in which the PT-RS are pre-DFT type, is used in PUSCH.

(45). The wireless communication method of (40), wherein the reference signals comprise demodulation reference signals (DMRS), and the inverse transform rule further indicates that the UCI is mapped to subcarriers identical to the DMRS subcarriers.

(46). The wireless communication method according to (40), wherein the UCI mapping varies depending on the reference signal patterns.

(47). The wireless communication method according to (40), wherein the UCI comprises a plurality of UCI types and the plurality of UCI types are prioritized, respectively, and

- in this case, the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the UCI type is mapped to the resource elements in which the reference signals are mapped.

(48). The wireless communication method of (47), wherein the inverse transform rule further indicates that all of the plurality of UCI types are mapped to identical subcarriers, and that the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource elements in which the UCI type is mapped, with resource elements in which the reference signals are mapped in the time domain.

(49). The wireless communication method according to (47), in which the inverse transform rule further indicates that the higher the priority assigned to the UCI type, the shorter the distances of one or more available resource units in which the UCI type is mapped, with resource units in which the reference signals are converted in the frequency domain and in the time domain.

(50). The wireless communication method according to any one of (47) to (49), wherein the plurality of UCI types comprise a hybrid automatic repeat request (HARQ-ACK) acknowledgment, a rank indicator (RI), beam steering / recovery, and channel state information (CSI). ), which are assigned priorities, respectively, in descending order of priority.

(51). The wireless communication method of (40), wherein the reference signals comprise demodulation reference signals (DMRS) with a load at the beginning and additional DMRSs, and the UCI mapping for the DMRS with a load at the beginning is the same or different from the UCI mapping for the additional DMRSs.

(52). The wireless communication method according to (40), in which in the frequency domain, the UCI is evenly distributed across the PRB for PUSCH, or is top and bottom centralized with respect to the PRB for PUSCH.

Claims (47)

1. A communication device containing: - a scheme that operatively converts the hybrid automatic re-transmission request (HARQ-ACK) bits into at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol adjacent to at least one OFDM symbol with demodulation reference signals (DMRS); and - a transmitter that transmits HARQ-ACK bits and DMRS demodulation reference signals in action, and the conversion position of the HARQ-ACK bits is different according to the conversion pattern of the DMRS reference signals. 2. The communications apparatus of claim 1, wherein the HARQ-ACK bits are mapped to one or more sequential OFDM symbols when the DMRS reference signals are mapped to one or more sequential OFDM symbols and the HARQ-ACK bits are mapped to two non-sequential OFDM symbols when the reference the DMRS demodulation signals are mapped to two non-consecutive OFDM symbols. 3. The communications apparatus of claim 1, wherein when the DMRS reference signals are mapped to two non-sequential OFDM symbols, the mapping of the HARQ-ACK bits around the first one of the two inconsistent OFDM symbols is the same as the mapping of the second of the two inconsistent OFDM symbols. 4. The communications apparatus of claim 1, wherein when the DMRS reference signals are mapped to two consecutive OFDM symbols, the HARQ-ACK bits are mapped to at least one OFDM symbol adjacent to the last OFDM symbol of two consecutive OFDM symbols and the HARQ- ACKs are not mapped to an OFDM symbol adjacent to the previous OFDM symbol of two consecutive OFDM symbols. 5. The communications apparatus of claim 1, wherein the HARQ-ACK bits are not mapped to phase tracking reference signal (PT-RS) resource elements. 6. The communications apparatus of claim 1, wherein the HARQ-ACK bits and DMRS demodulation reference signals are not multiplexed into the frequency domain even with cyclic prefix-based orthogonal frequency division (CP-OFDM). 7. The communications apparatus of claim 1, wherein the channel status information (CSI) bits are mapped after the HARQ-ACK. 8. The communications apparatus of claim 1, wherein the HARQ-ACK is mapped to allocated resource units within the allocated resource blocks. 9. The communications apparatus of claim 8, wherein the OFDM symbol is a Discrete Fourier Transform Spread Spectrum (DFT-S-OFDM) orthogonal frequency division multiplexing (DFT-S-OFDM) symbol. 10. The communications apparatus of claim 1, wherein the OFDM symbol is a cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM) symbol. 11. A communication method comprising the stages at which: converting hybrid automatic re-transmission request (HARQ-ACK) bits into at least one orthogonal frequency division multiplexing (OFDM) symbol adjacent to at least one OFDM symbol with demodulation reference signals (DMRS); and - transmit HARQ-ACK bits and DMRS demodulation reference signals, and the conversion position of the HARQ-ACK bits is different according to the conversion pattern of the DMRS reference signals. 12. Base station containing: - a receiver that in action receives hybrid automatic re-transmission request (HARQ-ACK) bits and demodulation reference signals (DMRS) in Orthogonal Frequency Division Multiplexing (OFDM) symbols; - a circuit that in action performs inverse mapping of the HARQ-ACK bits and the DMRS demodulation reference signals, the HARQ-ACK bits are mapped to at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol adjacent to at least one OFDM symbol with demodulation reference signals (DMRS); and the conversion position of the HARQ-ACK bits is different according to the conversion pattern of the DMRS reference signals. 13. The base station of claim 12, wherein the HARQ-ACK bits are mapped to one or more sequential OFDM symbols when the DMRS reference signals are mapped to one or more sequential OFDM symbols and the HARQ-ACK bits are mapped to two non-sequential OFDM symbols when the reference the DMRS demodulation signals are mapped to two non-consecutive OFDM symbols. 14. The base station of claim 12, wherein when the DMRS reference signals are mapped to two non-sequential OFDM symbols, the mapping of the HARQ-ACK bits around the first one of the two inconsistent OFDM symbols is the same as the mapping of the second of the two non-sequential OFDM symbols. 15. The base station of claim 12, wherein when the DMRS reference signals are mapped to two consecutive OFDM symbols, the HARQ-ACK bits are mapped to at least one OFDM symbol adjacent to the last OFDM symbol of two consecutive OFDM symbols and the HARQ bits -ACKs are not mapped to an OFDM symbol adjacent to the previous OFDM symbol of two consecutive OFDM symbols. 16. The base station of claim 12, wherein the HARQ-ACK bits are not mapped to phase tracking reference signal (PT-RS) resource elements. 17. The base station of claim 12, wherein the HARQ-ACK bits and DMRS demodulation reference signals are not multiplexed into the frequency domain even with cyclic prefix-based orthogonal frequency division (CP-OFDM). 18. The base station of claim 12, wherein the channel status information (CSI) bits are mapped after the HARQ-ACK. 19. The base station of claim 12, wherein the HARQ-ACK is mapped to allocated resource units within the allocated resource blocks. 20. The base station of claim 12, wherein the OFDM symbol is a Discrete Fourier Transform Spread Spectrum orthogonal Frequency Division (DFT-S-OFDM) symbol. 21. The base station of claim 12, wherein the OFDM symbol is a cyclic prefix-based orthogonal frequency division (CP-OFDM) symbol. 22. A communication method comprising the stages at which: - receiving hybrid automatic re-transmission request (HARQ-ACK) bits and demodulation reference signals (DMRS) in Orthogonal Frequency Division Multiplexing (OFDM) symbols; - perform inverse transformation of the HARQ-ACK bits and the DMRS demodulation reference signals, the HARQ-ACK bits are mapped to at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol adjacent to at least one OFDM symbol with demodulation reference signals (DMRS); and the conversion position of the HARQ-ACK bits is different according to the conversion pattern of the DMRS reference signals. 23. Integrated circuit containing: a circuit that, in action, controls - converting hybrid automatic re-transmission request (HARQ-ACK) bits into at least one orthogonal frequency division multiplexing (OFDM) symbol adjacent to at least one OFDM symbol with demodulation reference signals (DMRS); and - transmission of HARQ-ACK bits and DMRS demodulation reference signals, and the conversion position of the HARQ-ACK bits is different according to the conversion pattern of the DMRS reference signals. 24. Integrated circuit containing: a circuit that, in action, controls - receiving hybrid automatic re-transmission request (HARQ-ACK) and demodulation reference signals (DMRS) bits in Orthogonal Frequency Division Multiplexing (OFDM) symbols; - performing inverse mapping of HARQ-ACK bits and DMRS demodulation reference signals, the HARQ-ACK bits are mapped to at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol adjacent to at least one OFDM symbol with demodulation reference signals (DMRS); and the conversion position of the HARQ-ACK bits is different according to the conversion pattern of the DMRS reference signals.

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