Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. The method comprises: determining a first time domain resource and a second time domain resource, the first time domain resource being used for transmitting a demodulation reference signal (DMRS), the second time domain resource being used for transmitting uplink control information (UCI), and the first time domain resource and the second time domain resource being located on a same symbol; and sending the symbol by means of a physical uplink shared channel (PUSCH), the PUSCH using a single carrier waveform. According to the embodiments of the present application, transmitting the DMRS and the UCI by using the same symbol is advantageous in the following three aspects. In a first aspect, a terminal device can demodulate the UCI after receiving the symbol, thereby helping to reduce a delay in demodulating the UCI. In a second aspect, when the DMRS and the UCI share the same symbol, demodulating the UCI on the basis of a channel estimation result of the DMRS helps to reduce the impact of a time-varying feature of a channel on a result of demodulation of the UCI, thereby helping to improve UCI demodulation performance. In a third aspect, a minimum resource design is implemented.

Description

Communication method and communication apparatus

[0001] The present application claims priority to the Chinese patent application No. 202411401086.9, filed on September 30, 2024, and entitled "Communication method and communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of communication, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0003] The physical uplink shared channel (PUSCH) is one of the key transmission channels in the fifth generation (5G) communication technology, mainly used to carry user data and uplink control information (UCI). The UCI includes channel state information (CSI) and hybrid automatic repeat request (HARQ) acknowledgment (ACK) / negative acknowledgment (NACK) information. Therefore, how to improve the transmission performance of the PUSCH is a problem to be solved. For example, how to improve the coverage capability of the PUSCH and how to reduce the demodulation delay of the UCI in the PUSCH are problems to be solved. SUMMARY

[0004] The present application provides a communication method and a communication apparatus, which helps to improve the transmission performance of the PUSCH carrying the UCI.

[0005] In a first aspect, a communication method is provided, which includes: determining a first time domain resource and a second time domain resource, the first time domain resource being used for transmitting a demodulation reference signal (DMRS), the second time domain resource being used for transmitting uplink control information (UCI), the first time domain resource and the second time domain resource being located in the same symbol; and transmitting the symbol through a physical uplink shared channel (PUSCH), the PUSCH adopting a single carrier waveform.

[0006] That is, the DMRS and the UCI can be mapped in (carried by) the same symbol, or in other words, the DMRS and the UCI are co-symbol. In order to facilitate description, hereinafter, the symbol carrying the DMRS and the UCI is referred to as the first symbol.

[0007] Exemplarily, the communication method can be implemented by a terminal device, or by a component in the terminal device, such as a processor, a circuit, a chip or a chip system.

[0008] Exemplarily, the single-carrier waveform includes a discrete Fourier transform spreading OFDM (DFT-s-OFDM) with a low peak to average power ratio (PAPR). It should be understood that a signal will be amplified in power by a power amplifier (PA) before being transmitted. Reducing the PAPR of the input signal of the PA can reduce the output backoff (OBO) of the PA or increase the PA output power or the transmission signal power. Thus, the PUSCH adopts the single-carrier waveform, which helps to improve the transmission power and thus improve the coverage.

[0009] The same symbol is used to transmit the DMRS and the UCI in the embodiments of the present application, which can bring three benefits. First, the terminal device can demodulate the UCI after receiving the symbol, which helps to reduce the demodulation delay of the UCI. Second, in the case of the same symbol for the DMRS and the UCI, the UCI is demodulated based on the channel estimation result of the DMRS, which helps to reduce the influence of the time-varying characteristics of the channel on the demodulation result of the UCI, and thus helps to improve the demodulation performance of the UCI. Third, the resource is minimized.

[0010] It should be understood that the DMRS symbol and the UCI are not transmitted in the same symbol, such as the DMRS being transmitted in one symbol and the UCI being transmitted in another symbol, which is a non-resource-minimized design. If the terminal device enters a sleep state to save energy after processing the DMRS and the UCI, the resource-minimized design helps to save energy of the terminal because the resource-minimized design lasts for a shorter time in the time domain than the non-resource-minimized design.

[0011] In some embodiments, the first symbol further includes a third time-domain resource, and the third time-domain resource is used to transmit data.

[0012] In the embodiments of the present application, the first symbol carries the UCI and the uplink data at the same time, which can increase the scheduling flexibility of the PUSCH. In addition, it helps to reduce the time required for transmitting the UCI and the uplink data. Since the terminal device can enter a sleep state when it does not perform signal transmission and reception, the scheme helps to increase the sleep time of the terminal device, and thus helps to save energy of the terminal.

[0013] In some embodiments, the second time domain resource is also used for transmitting the data, and the UCI is interleaved with the data and mapped on the second time domain resource.

[0014] By the above implementation, the scheduling flexibility of the PUSCH is increased, and the terminal is powered down.

[0015] Since the PAPR of the first symbol is mainly determined by the data, and the centralized transmission of the data can deteriorate the PAPR of the first symbol, the UCI is interleaved with the data and mapped on the second time domain resource, which helps to reduce the PAPR of the first symbol. In addition, the UCI and the data are transmitted in an interleaved manner, which helps to obtain time diversity gain, thereby improving the demodulation performance of the UCI and the data.

[0016] In some embodiments, there is a guard interval between two adjacent time domain resources in the first time domain resource, the second time domain resource, and the third time domain resource, or there is a guard interval between the first time domain resource and the second time domain resource.

[0017] In the case where the second time domain resource is used for transmitting the UCI and the data, the guard interval (GI) between the first time domain resource and the second time domain resource helps to reduce the interference between the DMRS and the UCI and the data. In the case where the second time domain resource is used for transmitting the UCI and the third time domain resource is used for transmitting the data (i.e., the UCI and the data are transmitted by using independent resources), the guard interval between the first time domain resource, the second time domain resource, and the third time domain resource helps to reduce the mutual interference between the DMRS, the UCI, and the data, thereby improving the channel estimation performance and the demodulation performance of the UCI and the data.

[0018] Exemplarily, in the case where the first symbol includes the first time domain resource, the second time domain resource, and the third time domain resource in sequence, a guard interval can be included before the first time domain resource and / or after the third time domain resource.

[0019] In some embodiments, a guard interval can be included between two adjacent first symbols, thereby helping to reduce the inter-symbol interference.

[0020] In some embodiments, the second time domain resource is also used for transmission of data, the UCI is interleaved and mapped on the second time domain resource with the data, the UCI includes a plurality of UCI point groups, wherein: a spacing between any two adjacent UCI point groups in the plurality of UCI point groups is a first spacing, or a spacing between two adjacent UCI point groups in the plurality of UCI point groups is the first spacing or a second spacing, a difference between the first spacing and the second spacing is less than or equal to δ time domain resource units, one UCI point is carried in one time domain resource unit, and δ is a positive integer.

[0021] In other words, the UCI point groups are uniformly mapped on the second time domain resource, or the UCI point groups are approximately uniformly mapped on the second time domain resource.

[0022] Through the above implementation, based on the number of UCI point groups, the number of points included in the UCI point groups, and the number of points corresponding to the second time domain resource, etc., it can be determined how the UCI and the data are interleaved and mapped. In this way, in the process of the above interleaved mapping, it is not necessary to directly indicate the positions of all UCI point groups and / or all UCI points, thereby helping to reduce signaling overhead.

[0023] For example, the UCI can include 4 UCI point groups, denoted as group 0, group 1, group 2, and group 3. A spacing between group 0 and group 1 is d0, a spacing between group 1 and group 2 is d1, and a spacing between group 2 and group 3 is d2. The UCI point groups are uniformly mapped on the second time domain resource, i.e., d0=d1=d2. If the UCI point groups are approximately uniformly mapped on the second time domain resource, then |d i -d j |≤δ,0≤i,j≤2,i≠j.

[0024] In some embodiments, the second time domain resource is also used for transmission of a phase tracking reference signal (PTRS), or the second time domain resource and the third time domain resource are also used for transmission of a PTRS, the PTRS includes a plurality of PTRS point groups, wherein: a number of groups of the plurality of PTRS point groups and a number of PTRS points included in each PTRS point group in the plurality of PTRS point groups are associated with a sum of sizes of the second time domain resource and the third time domain resource, or are associated with a size of the second time domain resource.

[0025] Based on the estimation result of the PTRS, phase noise compensation can be performed on the UCI and the data, which helps to reduce the influence of the phase noise on the demodulation result of the UCI and the data, thereby helping to improve the transmission performance of the UCI and the data. For example, in a phase noise scenario (such as a high-frequency communication scenario), by placing the PTRS in the transmission resource of the UCI and the data, the transmission performance of the UCI and the data can be improved.

[0026] For example, the PTRS point groups can be uniformly mapped on the transmission resource of the UCI and the data. For example, the PTRS can be uniformly mapped on the second time domain resource, or the PTRS can be uniformly mapped on the second time domain resource and the third time domain resource. It should be understood that if there are other resources between the second time domain resource and the third time domain resource, such as time domain resources for GI, the PTRS can be uniformly mapped on the second time domain resource, the time domain resources for GI, and the third time domain resource.

[0027] For example, the PTRS point groups can be uniformly mapped on the transmission resource of the UCI and the data. For example, the PTRS can be uniformly mapped on the second time domain resource, or the PTRS can be uniformly mapped on the second time domain resource and the third time domain resource. It should be understood that if there are other resources between the second time domain resource and the third time domain resource, such as time domain resources for GI, the PTRS can be uniformly mapped on the second time domain resource, the time domain resources for GI, and the third time domain resource.

[0028] Through the above implementation, based on the number of PTRS point groups, the number of points included in the PTRS point group, and the number of points corresponding to the resource for transmitting the PTRS, the mapping position of the PTRS point can be determined. In this way, it is not necessary to indicate the mapping position of each PTRS point group and / or each PTRS point, thereby helping to reduce the signaling overhead of the indication.

[0029] In addition, the PTRS adopts a uniform mapping or an approximately uniform mapping manner, which helps to improve the phase noise estimation performance.

[0030] For example, the number of groups of the plurality of PTRS point groups and the number of PTRS points included in each PTRS point group of the plurality of PTRS point groups are associated with the size of the time domain resource for transmitting the PTRS. That is, the number of groups of the PTRS point groups and the number of PTRS points included in each PTRS point group are associated with the sum of the sizes of the second time domain resource and the third time domain resource, or are associated with the size of the second time domain resource. As an example, in the case that other resources are included between the second time domain resource and the third time domain resource, such as other resources for a guard interval, the number of groups of the PTRS point groups and the number of PTRS points included in each PTRS point group are associated with the sum of the sizes of the second time domain resource, the third time domain resource, and the other resources.

[0031] Exemplarily, the mapping pattern of the PTRS is associated with a size of the time domain resource for transmitting the PTRS. That is, the mapping pattern of the PTRS is associated with a sum of sizes of the second time domain resource and the third time domain resource, or is associated with a size of the second time domain resource.

[0032] In some embodiments, the UCI includes a plurality of UCI point groups, and at least one UCI point group of the plurality of UCI point groups is adjacent to a PTRS point group of the plurality of PTRS point groups.

[0033] Exemplarily, at least one UCI point group of the plurality of UCI point groups being adjacent to a PTRS point group of the plurality of PTRS point groups can mean that one UCI point group is adjacent to one PTRS point group of the PTRS point groups, or n UCI point groups are adjacent to n PTRS point groups of the PTRS point groups, where n is an integer greater than 1. For example, the ith UCI point group is adjacent to the jth PTRS point group, where 1≤i≤n, 1≤j≤n, and i and j are positive integers.

[0034] Exemplarily, one UCI point group being adjacent to one PTRS point group can include the UCI point group being located on the left of the PTRS point group, the UCI point group being located on the right of the PTRS point group, or the UCI point group being located in the middle of the PTRS point group.

[0035] Since the PTRS point group is adjacent to the UCI point group in the time domain, the phase noise estimation result of the PTRS is more accurate for the UCI. Based on this, the above method helps to improve the demodulation performance of the UCI in the presence of phase noise.

[0036] In some embodiments, the UCI includes channel state information (CSI), and the CSI includes a first part of CSI and a second part of CSI, the first part of CSI includes information associated with the second part of CSI, and a time domain resource carrying the first part of CSI is transmitted earlier than a time domain resource carrying the second part of CSI.

[0037] Exemplarily, the first part of CSI including information associated with the second part of CSI can be that the first part of CSI carries a number of information bits included in the second part of CSI.

[0038] Exemplarily, the time domain resource carrying the first part of CSI being transmitted earlier than the time domain resource carrying the second part of CSI can be that the first part of CSI is transmitted first, and then the second part of CSI is transmitted.

[0039] The first part of the CSI includes information associated with the second part of the CSI, and time domain resources carrying the first part of the CSI are transmitted earlier than time domain resources carrying the second part of the CSI, which facilitates the reception of the second part of the CSI.

[0040] In some embodiments, the second time domain resources are not used for transmitting data, the UCI includes hybrid automatic repeat request (HARQ) information, and time domain resources used for transmitting the HARQ information are located in a middle position of the second time domain resources.

[0041] Exemplarily, the HARQ information can include HARQ-ACK information and / or HARQ-NACK information.

[0042] The second time domain resources not being used for transmitting data can be understood as that the second time domain resources are only used for transmitting the UCI. If there is data to be transmitted, other time domain resources, such as third time domain resources, can be used. That is, the UCI and the data are transmitted by using time domain resources independent of each other.

[0043] This scheme facilitates to reduce the interference of DMRS and data on the HARQ-ACK / NACK information which is more important in the UCI, thereby facilitating to improve the demodulation performance of the HARQ-ACK / NACK.

[0044] In some embodiments, the symbol is also used for transmitting data, and the method further includes: when a modulation order of the data is greater than or equal to 4, a constellation diagram corresponding to a modulation scheme of the UCI is constituted by 4 outermost points of a constellation diagram corresponding to a modulation scheme of the data, or when the modulation order of the data is 1, a modulation order of the UCI is also 1 or the UCI adopts Pi / 2-BPSK modulation; or when the modulation order of the data is greater than or equal to 2, the modulation order of the UCI is 2 or the UCI adopts QPSK modulation, and a modulation result of the QPSK modulation is amplitude expanded according to an amplitude expansion factor, the amplitude expansion factor being related to the modulation order of the data.

[0045] In the embodiments of the present application, under the condition that the modulation scheme of the data is given, by optimizing the modulation scheme design of the UCI, the demodulation performance of the UCI can be improved without degrading the PAPR of the first symbol.

[0046] Exemplarily, when the modulation order of the data is greater than or equal to 4, the modulation scheme of the UCI corresponds to a constellation diagram composed of 4 points of an outermost circle of a constellation diagram corresponding to the modulation scheme of the data. For example, when the modulation order of the data is equal to 4, i.e., the data adopts 16-quadrature amplitude modulation (QAM), the constellation diagram of 16-QAM contains 16 points, and 4 points of an outermost circle of the 16-QAM constellation diagram have maximum energy. Therefore, the modulation constellation diagram of the UCI is constituted by the 4 points of the outermost circle, which is helpful to improve the demodulation performance of the UCI without degrading the PAPR of the first symbol.

[0047] Exemplarily, when the modulation order of the data is greater than or equal to 2, the modulation order of the UCI is 2, i.e., the UCI adopts QPSK modulation.

[0048] Exemplarily, the modulation result of the QPSK modulation is amplitude expanded according to an amplitude expansion factor. For example, the bits carrying the UCI are first modulated by QPSK to obtain a QPSK symbol sequence, and then the QPSK symbol sequence is amplitude expanded.

[0049] Exemplarily, the amplitude expansion factor is related to the modulation order of the data. For example, when the modulation order of the data is 2, the amplitude expansion factor is 1, and when the modulation order of the data is 4, the amplitude expansion factor is

[0050] Exemplarily, when the modulation order of the data is 1, the modulation order of the UCI is also 1 or the UCI adopts Pi / 2-binary phase shift keying (BPSK) modulation. When the modulation order of the data is 1, e.g., the data adopts Pi / 2-BPSK modulation, the UCI also adopts Pi / 2-BPSK modulation, which can avoid the adverse effect of the UCI on the PAPR of the first symbol, or in other words, avoid the UCI from becoming a bottleneck of the PAPR of the first symbol.

[0051] In some embodiments, the determining the first time domain resource and the second time domain resource comprises: receiving first information, and determining the first time domain resource and the second time domain resource based on the first information; wherein the first information is used to indicate one or more of the following: the size and position of the first time domain resource; the size and position of the second time domain resource; whether the second time domain resource is used to transmit data; the length of the guard interval; the position of the guard interval; or the content of the guard interval.

[0052] Exemplarily, the position of the guard interval can be one or more of the following: between the first time domain resource and the second time domain resource; before the first time domain resource; or after the second time domain resource.

[0053] Exemplarily, the first time domain resource is prior to the second time domain resource in time, which helps to reduce the demodulation delay of the UCI.

[0054] Exemplarily, in the case that the second time domain resource is used for transmitting data, the first information can further indicate parameters required for UCI and data interleaving mapping, such as one or more of the following: the number of UCI sample groups, the number of samples contained in each UCI sample group, the first interval, and the second interval, etc., so as to enable the terminal to process the second time domain resource.

[0055] Exemplarily, in the case that the second time domain resource is not used for transmitting data, and the first symbol includes a third time domain resource used for transmitting data, the first time domain resource, the second time domain resource, and the third time domain resource can be determined based on the first information sent by the network device. In this case, the first information can further be used to indicate the size and position of the third time domain resource.

[0056] Exemplarily, in the case that the first symbol further includes the PTRS, the first information can further be used to indicate the mapping pattern of the PTRS (such as the number of PTRS sample groups and the number of PTRS samples contained in each sample group), the interval between adjacent PTRS sample groups, etc.

[0057] Alternatively, the first information can be used to indicate one or more of the following: the size and position of the DMRS, the size and position of the UCI, the size and position of the data, the size and position of the PTRS, the size and position of the guard interval GI, or the content of the GI.

[0058] Exemplarily, the first indication information can be dynamically adjusted according to the use scenario or requirement. For example, considering a low-frequency communication scenario, the first symbol can not carry the PTRS, and in this case, the first information does not contain PTRS-related information. For another example, considering a high-frequency communication scenario, the first symbol can carry the PTRS, and in this case, the first information contains PTRS-related information. For another example, in the case that the channel frequency domain flatness for transmitting the first symbol is good, the inter-block interference between adjacent time domain resources (such as between the first time domain resource and the second time domain resource) is small. In this case, the length of the guard interval can be small, so as to reduce the resource overhead of the guard interval while meeting the performance requirement. For another example, the channel frequency domain flatness for transmitting the first symbol is poor, i.e., the frequency selective fading is strong. In this case, the length of the guard interval can be large, so as to reduce the inter-block interference between adjacent time domain resources.

[0059] In a second aspect, a communication method is provided, which includes receiving a symbol through a physical uplink shared channel (PUSCH), the PUSCH adopting a single carrier waveform. The symbol includes a first time domain resource for transmitting a demodulation reference signal (DMRS) and a second time domain resource for transmitting uplink control information (UCI).

[0060] Exemplarily, the communication method can be implemented by a network device, or by a component inside the network device, such as a processor, a circuit, a chip or a chip system.

[0061] Exemplarily, the single carrier waveform includes a discrete Fourier transform spreading OFDM (DFT-s-OFDM) with a lower PAPR. It should be understood that a signal will pass through a power amplifier (PA) for power amplification before being transmitted. Reducing the PAPR of the PA input signal can reduce the output backoff (OBO) of the PA or increase the PA output power or the transmission signal power. Thus, the PUSCH adopting the single carrier waveform helps to improve the transmission power and thus improve the coverage.

[0062] The present embodiments can bring three benefits by transmitting the DMRS and the UCI in the same symbol. First, the terminal device can demodulate the UCI after receiving the symbol, thereby helping to reduce the demodulation delay of the UCI. Second, in the case of the DMRS and the UCI in the same symbol, demodulating the UCI based on the channel estimation result of the DMRS helps to reduce the influence of the time-varying characteristics of the channel on the demodulation result of the UCI, thereby helping to improve the demodulation performance of the UCI. Third, resource minimization design.

[0063] It should be understood that transmitting the DMRS symbol and the UCI in different symbols, such as transmitting the DMRS in one symbol and transmitting the UCI in another symbol, is a non-resource minimization design. If the terminal device enters a sleep state to save energy after processing the DMRS and the UCI, because the resource minimization design lasts for a shorter time in the time domain than the non-resource minimization design, the resource minimization design also helps to achieve terminal energy saving.

[0064] In some embodiments, the symbol further includes a third time domain resource for transmitting data.

[0065] In the embodiments of the present application, the first symbol carries UCI and uplink data at the same time, which can increase the scheduling flexibility of PUSCH. In addition, the UCI and the uplink data are in the same symbol, which can reduce the time domain resources required for transmitting the UCI and the uplink data, and help to reduce the time required for transmitting the UCI and the uplink data. Since the terminal device can enter a sleep state when it does not perform signal transmission and reception, this scheme helps to increase the sleep time of the terminal device, thereby helping to achieve terminal energy saving.

[0066] In some embodiments, the second time domain resource is also used for transmitting the data, and the UCI and the data are interleaved and mapped on the second time domain resource.

[0067] Through the above implementation, the scheduling flexibility of PUSCH can be increased, and terminal energy saving can be achieved.

[0068] Since the PAPR of the first symbol is mainly determined by the data, and the concentrated transmission of the data can worsen the PAPR of the first symbol, the UCI and the data are interleaved and mapped on the second time domain resource, which helps to reduce the PAPR of the first symbol.

[0069] In addition, the UCI and the data are transmitted in an interleaved mapping manner, which helps to obtain time diversity gain, thereby helping to improve the demodulation performance of the UCI and the data.

[0070] In some embodiments, there is a guard interval between two adjacent time domain resources in the first time domain resource, the second time domain resource, and the third time domain resource, or there is a guard interval between the first time domain resource and the second time domain resource.

[0071] In the case where the second time domain resource is used for transmitting the UCI and the data, the guard interval between the first time domain resource and the second time domain resource helps to reduce the interference between the DMRS and the UCI and the data. In the case where the second time domain resource is used for transmitting the UCI and the third time domain resource is used for transmitting the data (i.e., the UCI and the data are transmitted by using independent resources), the guard interval between the first time domain resource, the second time domain resource, and the third time domain resource helps to reduce the mutual interference between the adjacent two information in the DMRS, the UCI, and the data, thereby helping to improve the channel estimation performance and the demodulation performance of the UCI and the data.

[0072] For example, in the case where the first symbol includes the first time domain resource, the second time domain resource, and the third time domain resource in sequence, a guard interval can be included before the first time domain resource and / or after the third time domain resource.

[0073] In some embodiments, a guard interval can be included between two adjacent first symbols, thereby helping to reduce the inter-symbol interference.

[0074] In some embodiments, the second time domain resource is further used for transmission of data, the UCI is interleaved and mapped with the data on the second time domain resource, the UCI includes a plurality of UCI sample groups, wherein: a spacing between any two adjacent UCI sample groups in the plurality of UCI sample groups is a first spacing, or a spacing between two adjacent UCI sample groups in the plurality of UCI sample groups is a first spacing or a second spacing, a difference between the first spacing and the second spacing is less than or equal to δ time domain resource units, one UCI sample is carried in one time domain resource unit, and δ is a positive integer.

[0075] Through the above implementation, based on the number of UCI sample groups, the number of samples included in the UCI sample groups, and the number of samples corresponding to the second time domain resource, it can be determined how the UCI and the data are interleaved and mapped. In this way, the positions of all UCI sample groups and / or all UCI samples do not need to be directly indicated, thereby helping to reduce signaling overhead.

[0076] For example, the UCI can include four UCI sample groups, denoted as group 0, group 1, group 2, and group 3. The spacing between group 0 and group 1 is d0, the spacing between group 1 and group 2 is d1, and the spacing between group 2 and group 3 is d2. The UCI sample groups are uniformly mapped on the second time domain resource, i.e., d0=d1=d2. If the UCI sample groups are approximately uniformly mapped on the second time domain resource, then

[0077] In some embodiments, the second time domain resource is further used for transmission of a phase tracking reference signal (PTRS), or the second time domain resource and the third time domain resource are further used for transmission of a PTRS, the PTRS includes a plurality of PTRS sample groups, wherein: the number of groups of the plurality of PTRS sample groups and the number of PTRS samples included in each PTRS sample group in the plurality of PTRS sample groups are associated with the sum of the sizes of the second time domain resource and the third time domain resource, or are associated with the size of the second time domain resource.

[0078] Based on the estimation result of the PTRS, the UCI and the data can be compensated for phase noise, which helps to reduce the influence of the phase noise on the demodulation result of the UCI and the data, thereby helping to improve the transmission performance of the UCI and the data. For example, in a phase noise scenario (such as a high-frequency communication scenario), by placing a PTRS in the transmission resource of the UCI and the data, the transmission performance of the UCI and the data can be improved.

[0079] For example, the PTRS point groups can be uniformly mapped on the transmission resources of the UCI and the data. For example, the PTRS can be uniformly mapped on the second time domain resources, or the PTRS can be uniformly mapped on the second time domain resources and the third time domain resources. It should be understood that if there are other resources between the second time domain resources and the third time domain resources, such as time domain resources for a guard interval (GI), the PTRS can be uniformly mapped on the second time domain resources, the time domain resources for the GI, and the third time domain resources.

[0080] For example, the PTRS point groups can be approximately uniformly mapped on the transmission resources of the UCI and the data. For example, the PTRS can be approximately uniformly mapped on the second time domain resources, or the PTRS can be approximately uniformly mapped on the second time domain resources and the third time domain resources. That is, the difference between the intervals of any two adjacent PTRS point groups is less than or equal to a preset number of time domain resource units.

[0081] Through the above implementation, the mapping positions of the PTRS points can be determined based on the number of PTRS point groups, the number of points included in the PTRS point groups, and the number of points corresponding to the resources used to transmit the PTRS. In this way, it is not necessary to indicate the mapping positions of each PTRS point group and / or each PTRS point, thereby helping to reduce the signaling overhead of the indication.

[0082] In addition, the PTRS adopts a uniform mapping or an approximately uniform mapping manner, which helps to improve the phase noise estimation performance.

[0083] For example, the number of groups of the plurality of PTRS point groups and the number of PTRS points included in each PTRS point group of the plurality of PTRS point groups are associated with the size of the time domain resources used to transmit the PTRS. That is, the number of groups of the PTRS point groups and the number of PTRS points included in each PTRS point group are associated with the sum of the sizes of the second time domain resources and the third time domain resources, or are associated with the size of the second time domain resources. As an example, in the case where other resources are included between the second time domain resources and the third time domain resources, such as other resources for a guard interval, the number of groups of the PTRS point groups and the number of PTRS points included in each PTRS point group are associated with the sum of the sizes of the second time domain resources, the third time domain resources, and the other resources.

[0084] For example, the mapping mode of the PTRS (or referred to as the mapping pattern of the PTRS) is associated with the size of the time domain resources used to transmit the PTRS. That is, the mapping mode of the PTRS is associated with the sum of the sizes of the second time domain resources and the third time domain resources, or is associated with the size of the second time domain resources.

[0085] In some embodiments, the UCI includes a plurality of UCI point groups, at least one of the plurality of UCI point groups is adjacent to a PTRS point group in the plurality of PTRS point groups.

[0086] For example, at least one of the plurality of UCI point groups is adjacent to a PTRS point group in the plurality of PTRS point groups can mean that one UCI point group is adjacent to one PTRS point group, or n UCI point groups are adjacent to n PTRS point groups, where n is an integer greater than 1. For example, the ith UCI point group is adjacent to the jth PTRS point group, where 1≤i≤n, 1≤j≤n, and i, j are positive integers.

[0087] For example, that one UCI point group is adjacent to one PTRS point group can include that the position of the UCI point group is on the left of the PTRS point group, the position of the UCI point group is on the right of the PTRS point group, or the position of the UCI point group is in both sides of the PTRS point group.

[0088] Since the PTRS point group is adjacent to the UCI point group in the time domain, the phase noise estimation result of the PTRS is more accurate for the UCI. Based on this, the above method helps to improve the demodulation performance of the UCI in the presence of phase noise.

[0089] In some embodiments, the UCI includes channel state information (CSI), the CSI includes a first part of CSI and a second part of CSI, the first part of CSI includes information associated with the second part of CSI, and the time domain resource carrying the first part of CSI is transmitted earlier than the time domain resource carrying the second part of CSI.

[0090] For example, the first part of CSI includes information associated with the second part of CSI can be that the first part of CSI carries the number of information bits included in the second part of CSI.

[0091] For example, the time domain resource carrying the first part of CSI is transmitted earlier than the time domain resource carrying the second part of CSI can be that the first part of CSI is transmitted first, and then the second part of CSI is transmitted.

[0092] The first part of CSI includes information associated with the second part of CSI, and the time domain resource carrying the first part of CSI is transmitted earlier than the time domain resource carrying the second part of CSI, which helps to receive the second part of CSI.

[0093] Exemplarily, in the case that the second time domain resource is used for transmitting UCI and the third time domain resource is used for transmitting data, the time domain resource carrying the first part of CSI is transmitted earlier than the time domain resource carrying the second part of CSI. That is, the first part of CSI can be transmitted first, and then the second part of CSI is transmitted, thereby facilitating the reception of the second part of CSI.

[0094] In some embodiments, the second time domain resource is not used for transmitting data, and the UCI includes hybrid automatic repeat request (HARQ) information, and the time domain resource used for transmitting the HARQ information is located at a middle position of the second time domain resource.

[0095] Exemplarily, the HARQ information can include HARQ-ACK information and / or HARQ-NACK information.

[0096] The second time domain resource not being used for transmitting data can be understood as that the second time domain resource is used for transmitting UCI and the third time domain resource is used for transmitting data. That is, the UCI and the data are transmitted by using time domain resources independent of each other.

[0097] The second time domain resource not being used for transmitting data can be understood as that the second time domain resource is used only for transmitting UCI. If there is data to be transmitted, other time domain resources, such as the third time domain resource, can be used. That is, the UCI and the data are transmitted by using time domain resources independent of each other.

[0098] This scheme helps to reduce the interference of DMRS and data on the important HARQ-ACK / NACK information in UCI, thereby helping to improve the demodulation performance of HARQ-ACK / NACK.

[0099] In some embodiments, the method further includes: transmitting first information, the first information being used for determining the first time domain resource and the second time domain resource; wherein the first information is used for indicating one or more of the following: the size and position of the first time domain resource; the size and position of the second time domain resource; whether the second time domain resource is used for transmitting data; the length of the guard interval; the position of the guard interval; or the content of the guard interval.

[0100] Exemplarily, the position of the guard interval can be one or more of the following: between the first time domain resource and the second time domain resource; before the first time domain resource; or after the second time domain resource.

[0101] Exemplarily, the first time domain resource is earlier in time than the second time domain resource, which helps to reduce the demodulation delay of UCI.

[0102] Exemplarily, in the case that the second time domain resource is used for transmitting data, the first information can further indicate parameters required for UCI and data interleaving mapping, such as one or more of the following: the number of UCI sample groups, the number of samples contained in each UCI sample group, the first interval, and the second interval, so as to enable the terminal to process the second time domain resource.

[0103] Exemplarily, the first time domain resource precedes the second time domain resource in time, which helps to reduce the demodulation delay of the UCI.

[0104] Exemplarily, in the case that the second time domain resource is not used for transmitting data, and the first symbol includes a third time domain resource used for transmitting data, the first time domain resource, the second time domain resource, and the third time domain resource can be determined based on the first information sent by the network device. In this case, the first information can further be used to indicate the size and position of the third time domain resource.

[0105] Exemplarily, in the case that the first symbol further includes PTRS, the first information can further be used to indicate the mapping pattern of the PTRS (such as the number of PTRS sample groups and the number of PTRS samples contained in each sample group), the interval between adjacent PTRS sample groups, and the like.

[0106] Alternatively, the first information can be used to indicate one or more of the following: the size and position of the DMRS, the size and position of the UCI, the size and position of the data, the size and position of the PTRS, the size and position of the GI, or the content of the GI.

[0107] Exemplarily, the first indication information can be dynamically adjusted according to the use scenario or requirement. For example, considering a low-frequency communication scenario, the first symbol can not carry PTRS, and in this case, the first information does not contain PTRS-related information. For another example, considering a high-frequency communication scenario, the first symbol can carry PTRS, and in this case, the first information contains PTRS-related information. For another example, in the case that the channel frequency domain flatness of the channel for transmitting the first symbol is good, the inter-block interference between adjacent time domain resources (such as between the first time domain resource and the second time domain resource) is small. In this case, the length of the guard interval can be small, so that the resource overhead of the guard interval can be reduced while meeting the performance requirement. For another example, the channel frequency domain flatness of the channel for transmitting the first symbol is poor, i.e., the frequency selective fading is strong. In this case, the length of the guard interval can be large, so as to reduce the inter-block interference between adjacent time domain resources.

[0108] Determining the size and position of the first time domain resource, the second time domain resource, and the third time domain resource in the first symbol based on the indication information of the network device helps to dynamically adjust the size and position of each time domain resource in the first symbol according to the requirement change, and improves the flexibility of the system.

[0109] In a third aspect, a communication apparatus is provided, which comprises units for performing respective steps in any possible implementation of the method in the first aspect and the second aspect.

[0110] In a fourth aspect, a communication apparatus is provided, which comprises at least one processor and a memory storing program instructions, when the program instructions stored in the memory are executed by the processor, the method in any possible implementation of the first aspect and the second aspect is performed.

[0111] In a fifth aspect, a communication apparatus is provided, which comprises at least one processor and interface circuitry, the at least one processor configured to perform the method in any possible implementation of the first aspect and the second aspect.

[0112] In a sixth aspect, a computer program product is provided, which comprises a computer program, when the part or all of the computer program is executed by a processor, the method in any possible implementation of the first aspect and the second aspect is performed.

[0113] In a seventh aspect, a computer readable storage medium is provided, which stores a computer program, when the part or all of the computer program is executed, the method in any possible implementation of the first aspect and the second aspect is performed.

[0114] In an eighth aspect, a chip is provided, which comprises a processor configured to invoke and run part or all of a computer program from a memory, so that a communication device installed with the chip performs the method in any possible implementation of the first aspect and the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0115] FIG. 1 is a schematic diagram of an architecture of a communication system to which embodiments of the present application are applied;

[0116] FIG. 2 is a typical block diagram of an OFDM system;

[0117] FIG. 3 is a schematic diagram of single carrier modulation;

[0118] FIG. 4 is an example diagram of OFDM or DFT-s-OFDM avoiding interference between blocks;

[0119] FIG. 5 is a schematic diagram of the relationship between input power and output power of a solid-state power amplifier;

[0120] FIG. 6 is a schematic diagram of PDSCH / PUSCH double symbol DMRS Type 1;

[0121] FIG. 7 is a schematic diagram of PDSCH / PUSCH double symbol DMRS Type2;

[0122] FIG. 8 is a schematic diagram of mapping of PUSCH (carrying UCI) time-frequency resources;

[0123] FIG. 9 is a schematic diagram of a communication method according to an embodiment of the present application;

[0124] FIG. 10 is an example diagram of a guard interval according to an embodiment of the present application;

[0125] FIG. 11 is another example diagram of a guard interval according to an embodiment of the present application;

[0126] FIG. 12 is an example diagram of mapping pattern of PTRS sample groups according to an embodiment of the present application;

[0127] FIG. 13 is an example diagram of mapping pattern of PTRS and UCI according to an embodiment of the present application;

[0128] FIG. 14 is an example diagram of resource mapping of first part CSI and second part CSI according to an embodiment of the present application;

[0129] FIG. 15 is an example diagram of resource mapping of HARQ-ACK in UCI according to an embodiment of the present application;

[0130] FIG. 16 is a constellation diagram of 16-QAM according to an embodiment of the present application;

[0131] FIG. 17 is an example diagram of demodulation scheme of first symbol according to an embodiment of the present application;

[0132] FIG. 18 is a schematic block diagram of a communication apparatus according to an embodiment of the present application;

[0133] FIG. 19 is a schematic block diagram of another communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0134] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0135] In the description of the embodiments of the present application, unless otherwise specified, " / " represents that the objects before and after the " / " are in an "or" relationship, for example, A / B can represent A or B; "and / or" in the embodiments of the present application is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. In addition, in the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more than two. "At least one of the following" or the like means any combination of the items, including any combination of single item or multiple items. For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, "first", "second", and the like are used to distinguish the same items or similar items with basically the same function and role. The skilled in the art can understand that "first", "second", and the like do not limit the quantity and execution order, and "first", "second", and the like do not necessarily mean different.

[0136] In the method embodiments of the embodiments of the present application, the size of the serial number does not mean the execution order, the execution order should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0137] It can be understood that in the embodiments of the present application, "in the case of", "if", "when", "if", and the like can be used instead. In addition, these descriptions all mean that corresponding processing will be made under certain objective conditions, not limited to time, and also does not require judgment action when implementing, and does not mean that there are other limitations.

[0138] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios without relying on other features, such as the scheme currently based on, to solve the corresponding technical problems and achieve the corresponding effects. In some scenarios, it can be combined with other features according to the demand. Correspondingly, the devices given in the embodiments of the present application can also realize these features or functions, which will not be described here.

[0139] In the embodiments of this application, the same or similar parts among various embodiments can be mutually referred to, unless otherwise specified. In the various embodiments of this application and the various implementation manners / implementation methods / realization methods in the various embodiments, the terms and / or descriptions of different embodiments and the various implementation manners / implementation methods / realization methods in the various embodiments are consistent and can be mutually referred to, unless otherwise specified and in conflict with logic. The technical features in different embodiments and the various implementation manners / implementation methods / realization methods in the various embodiments can be combined to form new embodiments, implementation manners, implementation methods, or realization methods according to their inherent logical relationship. The implementation manners of this application described below do not constitute a limitation on the protection scope of this application.

[0140] This application can be applied to various communication systems. For example, a fifth generation (5G) system or a new radio (NR), a satellite communication system, a long term evolution (LTE) system, and a future communication system. Exemplarily, this application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication system or other communication systems. For ease of understanding, the communication system applicable to the embodiments of this application is described below taking the communication system 100 shown in FIG. 1 as an example.

[0141] Referring to FIG. 1, a communication system 100 includes at least one network device, such as a network device 111, a network device 112, and a network device 113. The communication system 100 can also include at least one terminal device, such as a terminal device 121, a terminal device 122, a terminal device 123, a terminal device 124, a terminal device 125, a terminal device 126, and a terminal device 127. The network devices and the terminal devices can communicate with each other. For example, multi-site transmission, as shown in FIG. 1, can occur between the network device 112 and the terminal device 121, the terminal device 122, and the terminal device 123. The network device 113 can communicate with the terminal device 125, the terminal device 126, and the terminal device 127. For another example, enhanced mobile broadband (eMBB) transmission, as shown in FIG. 1, can occur between the network device 112 and the network device 113 and the terminal device 124. The network devices can also communicate with each other. For example, backhaul, as shown in FIG. 1, can occur between the network device 111, the network device 112, and the network device 113. The terminal devices can also communicate with each other. For example, D2D transmission, as shown in FIG. 1, can occur between the terminal device 122 and the terminal device 125.

[0142] It should be understood that the above description of FIG. 1 is exemplary and illustrative, and the present application is not limited thereto. The present application can be applied to any communication scenario in which a transmitting device and a receiving device communicate. It should also be understood that the communication devices (e.g., the transmitting device and the receiving device) mentioned in the present application can be network devices or terminal devices. For example, the transmitting device mentioned in the present application can be a terminal device, and the receiving device can be a network device. For another example, the transmitting device mentioned in the present application can be a network device, and the receiving device can be a terminal device. For yet another example, the transmitting device and the receiving device mentioned in the present application can both be terminal devices. For yet another example, the transmitting device and the receiving device mentioned in the present application can both be network devices.

[0143] The terminal device in the communication system can be referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The terminal device can be a device that provides voice / data connectivity to a user, such as a handheld device having wireless connection capability, a vehicle-mounted device, or the like. Currently, some examples of the terminal are: a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in autonomous driving, a wireless terminal in emote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved public land mobile network (PLMN), and the like, and the embodiments of the present application are not limited thereto. In vehicle-to-everything (V2X) communication, a communication terminal carried by a vehicle is a kind of terminal device, and a road side unit (RSU) can also be a kind of terminal device. A communication terminal carried by a drone can also be regarded as a kind of terminal device.

[0144] The terminal device can also be a wearable device. The wearable device can also be referred to as a wearable smart device, which is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into the clothes or accessories of the user. The wearable device is not only a hardware device, but also has powerful functions through software support and data interaction and cloud interaction. The general wearable smart device includes a full function, a large size, and can realize complete or partial functions without relying on a smart phone, such as a smart watch or smart glasses, and focuses on a certain application function and needs to cooperate with other devices, such as a smart phone, such as various smart wristbands and smart jewelry for monitoring vital signs.

[0145] The terminal device can also be a terminal device in an IoT system. The IoT is an important part of the future information technology development, and its main technical feature is to connect objects through communication technology and a network, thereby realizing an intelligent network of human-machine interconnection and object interconnection.

[0146] The network device in the communication system can be a device capable of communicating with the terminal device, and the network device can also be referred to as an access network device or a radio access network device, for example, the network device can be a base station. The network device can refer to a radio access network (RAN) node (or device) that accesses the terminal device to the wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master eNodeB (MeNB), secondary eNodeB (SeNB), multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station can also refer to a communication module, modem, or chip used in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device that performs the function of a base station in D2D, V2X, M2M communication, a device that performs the function of a base station in a future communication system, etc. The base station can support networks of the same or different access technologies. The present application does not limit the specific technology and specific device form adopted by the network device.

[0147] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to serve as a device that communicates with another base station.

[0148] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on water surface; and can also be deployed on airplanes, balloons and satellites in the air. The present application does not limit the scenario in which the network device and the terminal device are located.

[0149] For ease of understanding, the following introduces the communication terms related to the embodiments of the present application.

[0150] (1) Orthogonal frequency division multiplexing (OFDM)

[0151] Figure 2 is a typical block diagram of an OFDM system. As shown in Figure 2, a serial-to-parallel (S / P) module converts M consecutive data S(kM), S(kM+1), …, S(kM+M-1) (i.e. input data sequence) into an M-dimensional data block S k = [S(kM), S(kM+1), …, S(kM+M-1)] T , where subscript k is the OFDM symbol sequence number, and superscript T represents transposition. Among them, the signal {S(p)} is a frequency domain signal. Through subcarrier mapping, S k carries N sc of the N sc subcarriers, and the remaining (N-N sc ) subcarriers can be understood as being modulated by data 0. The N-dimensional data vector X k is obtained by N-point inverse discrete Fourier transform (IDFT) to obtain a set of N complex time domain sampling points x k = [x k (0), x k (1), …, x k (N-1)] T .

[0152] The next important operation to generate an OFDM signal is to insert a guard interval at the start of each OFDM symbol, which can eliminate inter-symbol interference (ISI) caused by multipath propagation (a propagation phenomenon in which a radio signal reaches the receiver through two or more paths). The guard interval is obtained by adding a cyclic prefix (CP) at the beginning of the symbol. Specifically, the last G samples of x k are copied and attached to the beginning of x k to obtain the time domain OFDM signal Thus one OFDM symbol contains valid data x k and a cyclic prefix (redundant data).

[0153] At the receiving end, the OFDM signal is demodulated by inverse processing. Assuming time and frequency synchronization is available and the CP length is sufficient, after CP removal (i.e. the first G samples of the received signal are removed), a data block with N samples is obtained, which is also equal to the OFDM symbol x k convolution with the channel impulse response. Time domain cyclic convolution can be converted to frequency domain point multiplication by discrete Fourier transform (DFT), and then channel equalization can be completed by frequency domain single tap equalization with low complexity.

[0154] S k The modulation symbols and / or the redundant signal samples can be included. The modulation symbols can be modulation symbols obtained by modulating a (coded) bit stream. The modulation scheme can include pulse amplitude modulation (PAM), phase shift keying (PSK), quadrature amplitude modulation, amplitude phase shift keying (APSK), etc.

[0155] The redundant signal samples can include phase tracking reference signal samples, demodulation reference signals, tone reservation signals, etc.

[0156] It should be understood that when the transform point number N satisfies certain constraints, such as N being a power of 2, 3, 5, etc., the IDFT can also be implemented by an efficient inverse fast Fourier transform (IFFT). Correspondingly, the DFT can also be implemented by an efficient fast Fourier transform (FFT). In the following, IDFT and IFFT can be interchangeable, and DFT and FFT can be interchangeable.

[0157] N sc may be understood as the number of subcarriers within the transmission bandwidth. In the above, N sc = M. It should be understood that N scs may also be greater than M.

[0158] (ii) DFT-s-OFDM

[0159] As shown in FIG. 2, DFT-s-OFDM defines a data block s kBefore the OFDM processing, there is an additional DFT (Discrete Fourier Transform) process, which is performed on each data block s containing M data points. k Perform an M-point DFT operation to obtain S k This operation gives DFT-s-OFDM signals the characteristics of a single carrier, resulting in a significantly lower PAPR (Power Amplifier Reduction Rate) than multi-carrier signals like OFDM. Therefore, with the same power amplifier, DFT-s-OFDM can provide greater output power and higher power amplifier efficiency, thereby improving coverage and reducing power consumption. The coverage and power consumption advantages of DFT-s-OFDM are particularly evident on the terminal device side; therefore, in current versions of LTE and NR, DFT-s-OFDM is used for uplink transmission.

[0160] s k This can include modulation symbols and / or redundant signal sampling points. Modulation symbols can be obtained by modulating the (coded) bitstream. Modulation methods can include PAM, PSK, QAM, offset quadrature amplitude modulation (OQAM), APSK, etc.

[0161] Redundant signal sampling points can include PTRS sampling points, unique words, zeros, etc.

[0162] (III) Single-carrier modulation waveform

[0163] Figure 3 is a schematic diagram of single-carrier modulation. Referring to Figure 3, the sequence s is processed by upsampling, filtering, and downsampling to obtain a single-carrier waveform (carrying valid data x). It should be understood that some implementations may not include a downsampling process, therefore the downsampling module in Figure 3 is represented by a dashed box. The DFT-s-OFDM waveform can be regarded as a single-carrier-like waveform.

[0164] OFDM or DFT-s-OFDM systems employ a block processing approach and utilize block-wise processing (CP) to avoid interference between blocks. Another advantage of CP is that it allows for the efficient processing of data x. k The linear convolution between the input and the channel impulse response is transformed into a circular convolution, thereby enabling low-complexity frequency-domain single-tap equalization. Single-carrier modulation can also utilize this idea to achieve frequency-domain single-tap equalization. Here, the upsampled input is the k-th block, which we can denote as s. k s k It contains CP (as shown in Figure 4(a)) or s k The tail contains a fixed sequence (as shown in Figure 4(b)) that is identical for all blocks, i.e., block s k1 The tail contains a fixed sequence and blocks. k2The tail contains the same fixed sequence, where k1≠k2.

[0165] It should be noted that for DFT-s-OFDM, if the modulation input s k Using the implementation shown in Figure 4(b), after performing the IDFT, it is not necessary to modify x. k A CP has been added. This is because two adjacent DFT-s-OFDM symbols have approximately equal tail signals, such as x. k The last G sample points correspond to the sequence and x k+1 The last G sample points correspond to the same sequence, x k The sequence corresponding to the last G sample points can be regarded as x k+1 The equivalent CP.

[0166] (iv) NR bit mapping

[0167] The relevant protocols define binary phase shift keying (BPSK), Bit mapping schemes include quadrature phase shift keying (QPSK) and QAM. QPSK can also be called 4QAM. Taking a QPSK modulation mapper as an example, it maps the i-th bit b(i) to the i-th BPSK symbol d(i) according to the following formula.

[0168] by Taking the modulation mapper as an example, it maps the i-th bit b(i) to the i-th bit according to the following formula. The symbol d(i).

[0169] It can be observed that, two adjacent symbols in a symbol sequence The symbol only has a 90-degree phase transition.

[0170] Taking a QPSK modulation mapper as an example, it maps two consecutive bits to a QPSK symbol, as shown in the following mapping:

[0171] Where b(2i) and b(2i+1) represent the 2i-th and 2i+1-th bits respectively, and d(i) represents the i-th QPSK symbol. Taking a 16QAM modulation mapper as an example, it maps four consecutive bits to a 16QAM symbol, as follows:

[0172] where b(4i), b(4i+1), b(4i+2) and b(4i+3) represent the 4th, 4th+1, 4th+2 and 4th+3 bits respectively, and d(i) represents the ith 16QAM symbol.

[0173] It should be appreciated that in future communication systems, Other implementations are possible for bit mapping schemes such as QPSK and QAM.

[0174] (V) Power amplifier output power backoff

[0175] Before a signal is transmitted through an antenna, it will go through a power amplifier to boost the signal power. One of the most basic ways to describe the PA behavior is the AM-AM (Amplitude Modulation-Amplitude Modulation) and AM-PM (Amplitude Modulation-Phase Modulation) characteristics of the PA. Figure 5 shows the AM-AM curve of a typical solid-state PA, which describes the output power as a function of the input power. It can be seen that the amplifier has a linear operating region. Within this region, the output power of the amplifier increases linearly with the input power. It can also be understood that the PA gain (i.e. the ratio of the PA output power and the input power) remains constant or the AM-AM curve slope remains constant. As the input power continues to increase, the amplifier enters a nonlinear region, the output power no longer increases linearly with the input power, the gain is compressed, and the AM-AM curve slope decreases. When the saturation output power is reached, i.e. the output power no longer increases with the increase of the input power, the slope is 0.

[0176] The impact of this nonlinear characteristic of the PA on the transmitted signal is manifested as in-band distortion and out-of-band distortion. The in-band distortion mainly manifests as distortion in amplitude and phase of the signal, which deteriorates the signal demodulation / detection performance. The out-of-band distortion mainly manifests as signal spectrum spreading / regeneration, which increases the interference to adjacent channel users. In order to alleviate the impact of PA nonlinearity, the power of the input signal can be appropriately reduced, i.e. input backoff (IBO) or output backoff, so that the PA works as much as possible in the linear region, but this is a method at the expense of reducing the efficiency of the PA.

[0177] (VI) PAPR

[0178] Peak-to-average power ratio, i.e. the ratio of peak power to average power. For a signal x(t), the peak power of the signal within a certain time interval (such as t0 to t1) is and the average power is The PAPR can be written as:

[0179] The communication signal (including OFDM, DFT-s-OFDM signal) is a random signal, the average power of which can be regarded as a fixed value, and the peak power is indeed a random variable. Therefore, the PAPR is also a random variable. In statistics, the value of a random signal at a certain time is often described by the probability density function. In the communication industry, engineers often use the complementary cumulative distribution function (CCDF) curve to describe the PAPR: the probability of the instantaneous power exceeding the average power xx dB is yy, or the proportion of time when the instantaneous power exceeds the average power xx dB is yy, which can be written as:

[0180] Where P(·) represents the probability.

[0181] The higher the PAPR of the PA input signal x(t) is, the greater the fluctuation range of the input power is, and the more power value needs to be backed off to ensure that the signal is in the linear amplification range. Therefore, designing a signal with low PAPR can reduce the PA OBO, improve the transmission power, and improve the coverage.

[0182] (Seven) Demodulation reference signal (DMRS)

[0183] Information is sent from the sending end, transmitted through the transmission channel, and received at the receiving end. Because the information may change (noise, fading, etc.) in the transmission channel, it may cause the received information to differ from the sent information. In order to accurately restore the correct information, it is necessary to understand what changes the information has undergone in the transmission process, so the RS (reference signal) is introduced.

[0184] The sending end and the receiving end agree on a known signal (such as RS) in advance, and the RS is transmitted together with the information to be sent in the transmission channel. After receiving the signal (RS'), the receiving end can understand the changes of the information in the transmission channel by comparing the differences between RS and RS', perform channel characteristic estimation, and obtain the channel characteristic H. According to the channel characteristic H, the received information can be restored to the correct sent information.

[0185] DMRS can be used for channel estimation during demodulation. For example, in LTE, NR, the DMRS of the physical downlink shared channel (PDSCH) / PUSCH can be used for channel estimation during data demodulation in PDSCH / PUSCH. Among them, PDSCH is used to transmit downlink data, and PUSCH is used to transmit uplink data.

[0186] In order to reduce the demodulation and decoding delay, NR adopts the front-loaded DMRS design idea. In each scheduling time unit or transmission time interval (TTI), the position where the DMRS first appears should be as close to the start point of scheduling as possible. For example, in a slot-based scheduling transmission, the front-loaded DMRS starts to transmit from the 2nd or 3rd symbol of the slot. In non-slot-based scheduling transmission (the scheduling unit is less than 1 slot), the front-loaded DMRS starts to transmit from the 0th symbol of the scheduling area.

[0187] The front-loaded DMRS can include 1 symbol or 2 symbols. It is also sometimes referred to as single-symbol DMRS or double-symbol DMRS.

[0188] From the frequency domain dimension, according to the difference in the maximum number of antenna ports supported, the DMRS can be divided into the following two types: Type 1 and Type 2. The following describes the DMRS of the two types respectively.

[0189] The DMRS of Type 1 is comb-shaped in the frequency domain and is divided into two code division multiplexing (CDM) groups, and code division multiplexing is used between ports in the group.

[0190] Among them, the single-symbol DMRS supports a maximum of 4 antenna ports, and the port numbers are 1000, 1001, 1002, and 1003; ports 1000 and 1001 belong to CDM group 0, and ports 1002 and 1003 belong to CDM group 1.

[0191] The double-symbol DMRS supports a maximum of 8 antenna ports, and the port numbers are 1000, 1001, 1002, 1003, 1004, 1005, 1006, and 1007; ports 1000, 1001, 1004, and 1005 belong to CDM group 0, and ports 1002, 1003, 1006, and 1007 belong to CDM group 1.

[0192] Figure 6 is a schematic diagram of PDSCH / PUSCH double-symbol DMRS Type 1. Referring to Figure 6, in time direction, one slot contains 14 symbols, corresponding to indexes 0-13, under normal CP. The front-loaded DMRS is transmitted from the 2nd symbol of the slot. In frequency direction, one resource block (RB) contains 12 subcarriers, corresponding to indexes 0-11. One resource element (RE) corresponds to one symbol in time direction and one subcarrier in frequency direction. One RB contains 6 REs for single antenna port or single CDM group, or in other words, there are 6 DMRS REs in one RB for single antenna port or single CDM group. In the time-frequency resource grid corresponding to one symbol and one RB, the first CDM group occupies even-indexed subcarriers, i.e. subcarrier indexes 0, 2, 4, 6, 8, 10. The second CDM group occupies odd-indexed subcarriers, i.e. subcarrier indexes 1, 3, 5, 7, 9, 11.

[0193] Compared to Type 1, Type 2 reduces the frequency domain density of DMRS. At this time, one RB contains 4 REs for single antenna port or single CDM group.

[0194] Generally, Type 2 is divided into three CDM groups, and code division multiplexing is used between ports in the group.

[0195] Among them, single-symbol DMRS supports a maximum of 6 antenna ports, which are divided into: CDM group 0, containing ports 1000 and 1001; CDM group 1, containing ports 1002 and 1003; CDM group 2, containing ports 1004 and 1005.

[0196] Double-symbol DMRS supports a maximum of 12 antenna ports, which are divided into: CDM group 0, containing ports 1000, 1001, 1006, 1007; CDM group 1, containing ports 1002, 1003, 1008, 1009; CDM group 2, containing ports 1004, 1005, 1010, 1011.

[0197] Figure 7 is a schematic diagram of PDSCH / PUSCH double-symbol DMRS Type 2. Referring to Figure 7, the front-loaded DMRS is transmitted from the 2nd symbol of the slot. In the time-frequency resource grid corresponding to one symbol and one RB, the first CDM group occupies subcarriers with indexes 0, 1, 6, 7. The second CDM group occupies subcarriers with indexes 2, 3, 8, 9. The third CDM group occupies subcarriers with indexes 4, 5, 10, 11.

[0198] In NR, PUSCH supports two waveforms: OFDM waveform and DFT-s-OFDM waveform. When DFT-s-OFDM waveform is adopted, only Type 1 is supported.

[0199] According to the above introduction, for a single CDM group or a single port, whether it is Type 1 or Type 2, it only occupies part of the subcarriers in a RB, for example, for Type 1, port 1000 only occupies subcarriers 0, 2, 4, 6, 8, 10. In NR, the concept of the number of CDM groups without DMRS data is defined. Based on the number of CDM groups without DMRS data and the antenna port number, it can be determined whether the remaining subcarriers of a RB (these subcarriers do not carry DMRS sequences) carry data or are empty.

[0200] For low mobility scenarios, the pre-DMRS can obtain channel estimation performance that meets demodulation requirements at a lower cost. However, in high-speed mobile scenarios, such as the mobile speed considered in the 5G NR system, which can be as high as 500 km / h, the channel changes rapidly over time, and the pre-DMRS is difficult to capture the channel changes, resulting in inaccurate channel estimation results. To solve this problem, the 5G NR system adopts a DMRS pilot structure that combines pre-DMRS and additional DMRS. The pattern of each group of additional DMRS is a repetition of the pre-DMRS pilot, that is, each group of additional DMRS occupies the same subcarriers and the same number of OFDM symbols as the pre-DMRS. According to the specific scenario, up to 3 groups of additional pilots can be added when the pre-DMRS is single-symbol, and up to 1 group of additional pilots can be added when the pre-DMRS is double-symbol. The specific configuration is according to the needs and indicated through control signaling.

[0201] (Eight) UCI

[0202] UCI mainly includes uplink scheduling request (Scheduling Request, SR), hybrid automatic repeat request (hybrid automatic repeat request, HARQ) acknowledgment (acknowledgment, ACK) / negative acknowledgment (negative acknowledgment, NACK), and channel state information (channel state information, CSI).

[0203] The uplink shared channel (UL-SCH) is a transport channel in NR for transmitting uplink data. The physical channel corresponding to the UL-SCH is referred to as the physical uplink shared channel (PUSCH). If a terminal has uplink data to be transmitted, the terminal needs to apply for resources of the UL-SCH channel in advance to a network device (such as a base station), and the application process is referred to as SR.

[0204] The UCI can be transmitted through a physical uplink control channel (PUCCH) or a PUSCH. Among them, the SR is limited to PUCCH transmission, such as using the PUCCH to transmit the SR before the terminal device establishes a radio resource control (RRC); and when the PUCCH channel is used to transmit the CSI and the HARQ, it depends on the state of the terminal device and the uplink radio resource allocated by the base station to the terminal device. In addition, the transmission of uplink service data is limited to the PUSCH channel, such as transmitting the uplink service data through the PUSCH after establishing the RRC connection.

[0205] According to the foregoing introduction, it can be known that the PUSCH is mainly used to carry user data and UCI, such as CSI, HARQ-ACK / NACK information, etc. FIG. 8 is a mapping diagram of a time-frequency resource of the PUSCH (carrying UCI).

[0206] Referring to FIG. 8, the PUSCH adopts an OFDM waveform. The CSI is mapped from the 0th symbol of the PUSCH, while skipping the DMRS symbol. The CSI includes a first part of the CSI (CSI part 1) and a second part of the CSI (CSI part 2). The HARQ-ACK is mapped from the first symbol after the pre-DMRS symbol. The PUSCH shown in FIG. 8 includes 14 symbols (assuming that the numbering starts from 0), among which symbol 2 carries a pre-DMRS symbol, and symbols 7 and 11 carry two additional DMRS symbols. The CSI part 1 is mapped to symbols 0 and 1, and the CSI part 2 is mapped to symbols 1, 3, and 4, while skipping the DMRS symbol. The HARQ-ACK is mapped to the 3rd symbol, which is the first symbol after the pre-DMRS symbol. The remaining REs are used to carry data. It should be noted that in FIG. 8, the REs other than the DMRS REs in the DMRS symbol are placed with data.

[0207] It is mentioned above that the OFDM waveform has a high PAPR, resulting in a large power output backoff of the PA, and thus low transmission power and small uplink coverage. In addition, the DMRS and the UCI are mapped on different symbols, and thus the terminal device needs to receive both the DMRS symbol and the symbol carrying the UCI before starting demodulation of the UCI, increasing the demodulation delay. As shown in FIG. 8, the terminal device needs to receive both the DMRS symbol and the symbol carrying the HARQ-ACK before starting demodulation of the HARQ-ACK.

[0208] As one of the key transmission channels in 5G communication technology, how to improve the transmission performance of the PUSCH is a problem to be solved. For example, how to improve the coverage performance of the PUSCH and how to reduce the demodulation delay of the UCI are problems to be solved.

[0209] Therefore, embodiments of the present application provide a communication method to solve one or more of the above problems. In a first aspect, embodiments of the present application transmit the DMRS and the UCI in the same symbol, so that the terminal device can demodulate the UCI after receiving the symbol, thereby helping to reduce the demodulation delay of the UCI. In a second aspect, in the case of the DMRS and the UCI in the same symbol, the UCI is demodulated based on the channel estimation result of the DMRS, which helps to reduce the influence of the time-varying characteristics of the channel on the demodulation result of the UCI, thereby helping to improve the demodulation performance of the UCI. In a third aspect, the DMRS and the UCI in the same symbol help to achieve minimum resource design. In a fourth aspect, in view of the low PAPR of the single-carrier waveform, in embodiments of the present application, the PUSCH adopts the single-carrier waveform, which can reduce the OBO of the PA, improve the transmission power of the PUSCH, and thus help to improve the coverage capability of the PUSCH.

[0210] For ease of understanding, some concepts involved in embodiments of the present application will be briefly introduced below.

[0211] In some embodiments, one PUSCH symbol can be composed of multiple time-domain resource units, each of which can be used to carry one sample. It should be understood that the sample can be a sample before modulation or a sample after modulation. Some time-continuous samples constitute a subblock.

[0212] Referring back to FIG. 2, taking the sample after modulation as an example, the effective data of one OFDM symbol (or the data carried by the symbol) x k contains N samples x k (0), x k (1), …, x k (N-1). Wherein, x kmay be split into multiple sub-blocks, such as sub-block 0, sub-block 1, …. Sub-block 0 contains, for example, the first 10 samples of s k .

[0213] With continued reference to FIG. 2, a block s k may contain M samples, a block s k may be split into multiple sub-blocks, such as sub-block 0, sub-block 1, …. Sub-block 0 contains, for example, the first 10 samples of s k .

[0214] The method provided by the embodiments of the present application will be described below in conjunction with FIG. 9.

[0215] FIG. 9 is a flow diagram of a communication method provided by an embodiment of the present application. The method shown in FIG. 9 can involve the interaction of a terminal device and a network device. The terminal device can be any of the terminal devices mentioned above, or can be a chip, chip system, or processor, etc. that supports the terminal device to implement the method. The network device can be any of the network devices mentioned above, or can be a chip, chip system, or processor, etc. that supports the network device to implement the method.

[0216] The method provided by the embodiments of the present application will be described below in conjunction with FIG. 9.

[0217] The method shown in FIG. 9 can include step S910 and step S920.

[0218] S910, the terminal device determines a first time domain resource and a second time domain resource.

[0219] The first time domain resource can be used to transmit DMRS, and the second time domain resource can be used to transmit UCI. The first time domain resource and the second time domain resource are located in the same symbol. That is, DMRS and UCI can be mapped to (carried in) the same symbol, or in other words, DMRS and UCI are co-symbol. For ease of description, the symbol carrying DMRS and UCI will be referred to as the first symbol hereinafter.

[0220] It should be understood that DMRS and UCI are not co-symbol transmitted, such as DMRS transmitted in one symbol and UCI transmitted in another symbol, which is a non-resource minimal design. If the terminal device enters a sleep state to save energy after processing DMRS and UCI, the resource minimal design is also helpful to achieve terminal energy saving because the resource minimal design lasts for a shorter time in the time domain than the non-resource minimal design.

[0221] Exemplarily, DMRS and UCI are time division multiplexed.

[0222] Exemplarily, the UCI can include CSI, HARQ-ACK / NACK information, and the like. The CSI can include a first part of CSI (i.e., CSI part 1) and a second part of CSI (i.e., CSI part 2), and the CSI part 1 can include (or be used to indicate) relevant information of the CSI part 2, such as a number of information bits in the CSI part 2.

[0223] In the embodiments of the present application, the DMRS and the UCI are transmitted in the same symbol, so that the terminal device can demodulate the UCI after receiving the symbol, thereby helping to reduce the demodulation delay of the UCI. Referring back to FIG. 8, taking the HARQ-ACK in the UCI as an example, the terminal device needs to receive the DMRS symbol (symbol 2) and the symbol (symbol 3) carrying the HARQ-ACK before starting the demodulation of the HARQ-ACK. If the method in the embodiments of the present application is used, the DMRS and the HARQ-ACK can be located in the same symbol, such as symbol 2 in FIG. 8, so that the terminal device can demodulate the HARQ-ACK after receiving symbol 2. That is, using the method in the embodiments of the present application, the terminal device can start the demodulation of the HARQ-ACK earlier, thereby helping to reduce the demodulation delay of the HARQ-ACK. Further, the fast feedback of the HARQ-ACK helps to improve the system performance.

[0224] In addition, in the case that the UCI and the DMRS are in the same symbol, the UCI is demodulated based on the channel estimation result of the DMRS, which helps to reduce the influence of the time-varying characteristics of the channel on the demodulation result of the UCI, thereby helping to improve the demodulation performance of the UCI.

[0225] In some embodiments, the first time domain resource can be prior in time to the second time domain resource, which helps to reduce the delay of the terminal device in obtaining the channel estimation result based on the DMRS. Since the UCI needs to be demodulated based on the channel estimation result, reducing the delay of obtaining the channel estimation result helps to reduce the demodulation delay of the UCI.

[0226] In some embodiments, the relevant information of the first time domain resource and the second time domain resource, such as the resource location and the resource size, can be predefined, such as predefined by a protocol or preconfigured.

[0227] In some embodiments, the relevant information of the first time domain resource and the second time domain resource, such as the resource location and the resource size, can be determined based on the indication information of the network device, such as based on the first information mentioned below. The specific determination manner can refer to the introduction of the first information below, which will not be described here.

[0228] In some embodiments, the information about the first time domain resource and the second time domain resource can include multiple cases. The multiple cases mentioned herein can be predefined or preconfigured. In use, the terminal device can determine the information about the first time domain resource and the second time domain resource based on an identifier or an index of the multiple cases indicated by the network device.

[0229] For example, the configuration information of the first symbol can be preconfigured, predefined or dynamically indicated, so as to determine the information about the first time domain resource and the second time domain resource based on the configuration information of the first symbol.

[0230] S920, the terminal device transmits the symbol through the PUSCH. Correspondingly, the network device receives the symbol through the PUSCH.

[0231] As mentioned above, the signal will pass through the PA to improve the signal power before being transmitted through the antenna. The working area of the PA includes a linear area and a nonlinear area (such as a saturation area), and when the PA works in the nonlinear area, the input signal will be distorted. Through IBO or OBO, the PA can work in the linear area as much as possible.

[0232] In the related art, the PUSCH carrying the UCI adopts the OFDM waveform, but the OFDM waveform has a high PAPR. The higher the PAPR of the PA is, the greater the floating range of the input power is, and then the more the power value needs to be backed off in order to ensure that the signal is in the linear amplification area. The more the power value needs to be backed off, the smaller the output power of the PA is, which will affect the coverage ability of the signal.

[0233] In order to solve the above problems, in the embodiments of the present application, the PUSCH can adopt a single carrier waveform, or the modulation waveform of the PUSCH is a single carrier waveform. Generally speaking, the PAPR of the single carrier waveform is low, which can reduce the PA OBO, thereby improving the transmission power of the PUSCH, and further helping to improve the coverage.

[0234] For example, the single carrier waveform includes a discrete Fourier transform spreading OFDM (DFT-s-OFDM). The waveform has a lower PAPR than the OFDM waveform, which helps to improve the transmission power and further improve the coverage.

[0235] As mentioned above, the PUSCH is also used to transmit data, and the transmission mode of the data will be introduced below.

[0236] In some embodiments, the first symbol can further include a third time domain resource, and the third time domain resource can be used for transmitting data. That is, the DMRS, the UCI, and the data are co-symbols.

[0237] The first symbol carrying the UCI and the uplink data at the same time can increase the scheduling flexibility of the PUSCH. In addition, it helps to reduce the time required for transmitting the UCI and the uplink data. Since the terminal device can enter a sleep state when it does not perform signal transmission and reception, this scheme helps to increase the sleep time of the terminal device, thereby helping to achieve terminal energy saving.

[0238] In addition, the UCI, the DMRS, and the uplink data are co-symbols, which helps to achieve a minimum resource design.

[0239] For example, the first time domain resource, the second time domain resource, and the third time domain resource do not have overlapping parts in the time domain. In this way, the transmission resources of the data, the UCI, and the DMRS are independent of each other, which helps to reduce the complexity of demodulation.

[0240] For example, the first symbol can include at least one first time domain resource, at least one second time domain resource, and at least one third time domain resource. Each first time domain resource can be used to carry a first sub-block, i.e., a DMRS sub-block; each second time domain resource can be used to carry a second sub-block, i.e., a UCI sub-block; and each third time domain resource can be used to carry a third sub-block, i.e., a data sub-block.

[0241] For example, the first time domain resource, the second time domain resource, and the third time domain resource can each be composed of a plurality of time domain resource units that are continuous in time. The plurality of first time domain resources can be continuous in time or discontinuous in time. The plurality of second time domain resources can be continuous in time or discontinuous in time. The plurality of third time domain resources can be continuous in time or discontinuous in time.

[0242] In some embodiments, the second time domain resource is also used for transmitting data, that is, the second time domain resource can also be used for transmitting the UCI and the data.

[0243] Through the above implementation, the scheduling flexibility of the PUSCH can be increased, and the terminal energy saving can be achieved.

[0244] For example, the resource for transmitting the UCI in the second time domain resource is transmitted before the resource for transmitting the data. That is, the UCI is transmitted preferentially, and the data is transmitted on the remaining resources of the second time domain resource. In this way, the demodulation delay of the UCI can be further reduced.

[0245] For example, the UCI and the data are interleaved and mapped on the second time domain resource.

[0246] Since the PAPR of the first symbol is mainly determined by the data, and the concentrated transmission of the data can deteriorate the PAPR of the first symbol, the UCI is interleaved and mapped with the data on the second time domain resource, which helps to reduce the PAPR of the first symbol. In addition, the UCI and the data are transmitted in an interleaved manner, which helps to obtain time diversity gain, thereby helping to improve the demodulation performance of the UCI and the data.

[0247] Exemplarily, the first symbol can include at least one first time domain resource and at least one second time domain resource. Each first time domain resource can be used to carry a first sub-block, i.e., a DMRS sub-block; and each second time domain resource can be used to carry a fourth sub-block, or a composite sub-block of UCI and data, referred to as a composite sub-block for short.

[0248] In some embodiments, in the case where the second time domain resource is used to transmit the UCI and the third time domain resource is used to transmit the data, the second time domain resource is adjacent to the DMRS resource, which helps to reduce the demodulation delay of the UCI.

[0249] Exemplarily, the first time domain resource precedes the second time domain resource in time, which helps to reduce the demodulation delay of the UCI.

[0250] Based on the above description, the aforementioned co-symbol transmission of the DMRS, the UCI and the data can refer to that the DMRS sub-block, the UL-SCH sub-block and the UCI sub-block are located in the same first symbol in a time division multiplexing manner, or the DMRS sub-block and the composite sub-block are located in the same first symbol in a time division multiplexing manner.

[0251] For ease of description, the DMRS sub-block can be used to refer to the first time domain resource, the UCI sub-block can be used to refer to the second time domain resource, and the UL-SCH sub-block can be used to refer to the third time domain resource hereinafter. Alternatively, in the case where the second time domain resource is used to transmit the UCI and the data, the composite sub-block can be used to refer to the second time domain resource.

[0252] In the embodiments of the present application, through the co-symbol transmission of the UCI, the DMRS and the data, on the one hand, it helps to achieve the minimum resource design, and on the other hand, it helps to reduce the demodulation delay of the UCI and the data.

[0253] In the case where the first symbol includes one first time domain resource, the starting position of the first time domain resource is the starting position of the first symbol, or the distance between the starting position of the first time domain resource and the starting position of the first symbol is less than a preset value. In other words, the starting position of the first time domain resource is as close as possible to the starting position of the first symbol. This scheme helps to obtain the channel estimation performance that meets the demodulation requirement with lower overhead.

[0254] In the case that the first symbol includes a plurality of first time domain resources, the plurality of first time domain resources can be respectively used for transmission of the front-loaded DMRS subblock and the additional DMRS subblock. For the convenience of description, the first time domain resource used for transmission of the front-loaded DMRS subblock can be referred to as resource A, and the first time domain resource used for transmission of the additional DMRS subblock can be referred to as resource B.

[0255] The starting position of the resource A can be the starting position of the first symbol, or the distance between the starting position of the resource A and the starting position of the first symbol can be less than a preset value. This scheme can obtain channel estimation performance meeting demodulation requirements with lower overhead in a low mobility scenario.

[0256] If the number of the resource B is 1, the ending position of the resource B can be the ending position of the first symbol, or the distance between the ending position of the resource B and the ending position of the first symbol is less than a preset value. If the number of the resource B is greater than 1, the resource B can be uniformly distributed in the first symbol, for example; or one of the resource B is located at the ending position of the first symbol, and the positions of the other resource B can be random or determined according to requirements. In this way, in a high-speed mobile scenario, the transmission of the front-loaded DMRS subblock and the additional DMRS subblock helps to capture the rapid change of the channel over time, thereby helping to improve the accuracy of channel estimation.

[0257] In some embodiments, there is a guard interval between two adjacent time domain resources in the first time domain resource, the second time domain resource and the third time domain resource, or there is a guard interval between the first time domain resource and the second time domain resource.

[0258] The guard interval helps to reduce the mutual interference between the DMRS, the UCI and the data, thereby helping to improve the channel estimation performance and making the demodulation performance of the UCI and the data more robust.

[0259] Exemplarily, in the case that the first symbol includes the first time domain resource, the second time domain resource and the third time domain resource, there is a guard interval between two adjacent time domain resources in the first time domain resource, the second time domain resource and the third time domain resource.

[0260] If the first symbol includes one first time domain resource, one second time domain resource and one third time domain resource, there is a guard interval between two adjacent time domain resources in the first time domain resource, the second time domain resource and the third time domain resource, as shown in FIG. 10(a). Referring to FIG. 10(a), there is a GI between the DMRS subblock and the UCI subblock, and there is a GI between the UCI subblock and the UL-SCH subblock.

[0261] If the first symbol comprises multiple first time-domain resources, multiple second time-domain resources or multiple third time-domain resources, there is a guard interval between any two adjacent time-domain resources, as shown in FIG. 10(b). Referring to FIG. 10(b), there is a GI between the first DMRS sub-block and the UCI sub-block, and there is a GI between the UCI sub-block and the UL-SCH sub-block, and there is a GI between the UL-SCH sub-block and the second DMRS sub-block.

[0262] Optionally, if the second time-domain resource is adjacent to the third time-domain resource, the guard interval between the second time-domain resource and the third time-domain resource can be omitted to reduce overhead, as shown in FIG. 10(e).

[0263] It should be understood that the above-mentioned guard interval can also be referred to as an inter-subblock guard interval, i.e., Inter-subblock GI.

[0264] It can be seen that, in the case where the second time-domain resource is used to transmit UCI and the third time-domain resource is used to transmit data (i.e., UCI and data are transmitted using independent resources), the guard intervals between the first time-domain resource, the second time-domain resource and the third time-domain resource help to reduce the mutual interference between adjacent two types of information in DMRS, UCI and data, thereby helping to improve the channel estimation performance and the demodulation performance of UCI and data.

[0265] Exemplarily, in the case where the first symbol comprises a first time-domain resource and a second time-domain resource, there is a guard interval between the first time-domain resource and the second time-domain resource, as shown in FIG. 11(a). In this case, the second time-domain resource is used to transmit UCI and data. Referring to FIG. 11(a), there is a GI between the DMRS sub-block and the composite sub-block.

[0266] It can be seen that, in the case where the second time-domain resource is used to transmit UCI and data, the guard interval between the first time-domain resource and the second time-domain resource helps to reduce the interference between DMRS and UCI and data, thereby helping to improve the channel estimation performance and the demodulation performance of UCI and data.

[0267] In some embodiments, there is a GI before the first sub-block and / or after the last sub-block in the first symbol, or in other words, there is a GI at the head and / or tail of the first symbol, thereby helping to reduce the interference between the first sub-block and the last sub-block. For example, when the PUSCH adopts a DFT-s-OFDM waveform, there is interference between the first sub-block and the last sub-block, and the GI before the first sub-block and / or after the last sub-block helps to reduce the above-mentioned interference.

[0268] For example, a GI exists before the first sub-block in the first symbol, as shown in FIG. 10(c), or as shown in FIG. 11(b). Specifically, FIG. 10(c) is based on FIG. 10(a) with a GI placed before the first sub-block. FIG. 11(b) is based on FIG. 11(a) with a GI placed before the first sub-block.

[0269] For example, a GI exists after the last sub-block in the first symbol, as shown in FIG. 10(d), or as shown in FIG. 11(c). Specifically, FIG. 10(d) is based on FIG. 10(c) with a GI placed after the last sub-block. FIG. 11(c) is based on FIG. 11(b) with a GI placed after the last sub-block.

[0270] In some embodiments, a GI exists between two adjacent first symbols, which can be referred to as Inter-symbol GI, to help reduce the interference between symbols.

[0271] For example, the Inter-symbol GI can be the CP mentioned above, and the content of the Inter-symbol GI can also be determined according to the determination method of the CP. For example, the Inter-symbol GI can contain samples before modulation, or contain samples after modulation. If the PUSCH adopts the DFT-s-OFDM waveform, the Inter-symbol GI contains samples after modulation. If the PUSCH adopts the single-carrier waveform and the Inter-symbol GI is implemented by the method shown in FIG. 4(a), the Inter-symbol GI contains samples before modulation.

[0272] For example, the Inter-symbol GI can also be an equivalent CP. The Inter-symbol GI can contain samples before modulation, or contain samples after modulation. If the PUSCH adopts the single-carrier waveform and the Inter-symbol GI is implemented by the method shown in FIG. 4(b), the Inter-symbol GI contains samples before modulation.

[0273] In some embodiments, the size of the guard interval, or the length of the guard interval, can be determined according to the frequency domain flatness of the channel.

[0274] For example, in the case where the frequency domain flatness of the channel for transmitting the first symbol is good, the inter-block interference between two adjacent time domain resources (such as the first time domain resource and the second time domain resource) is small. In this case, the guard interval between the two adjacent time domain resources is small, so that the resource overhead of the guard interval can be reduced while meeting the performance requirements.

[0275] Exemplarily, the channel frequency domain flatness of the first symbol is poor, i.e., the frequency selective fading is strong. In this case, the guard interval between the two adjacent time domain resources (e.g., the first time domain resource and the second time domain resource) is large, so as to reduce the inter-block interference between the two adjacent time domain resources.

[0276] It is mentioned above that the second time domain resource can be used for transmission of UCI and data. The UCI and the data can be interleaved and mapped on the second time domain resource.

[0277] It should be understood that the UCI can include a plurality of UCI point groups, each UCI point group including a plurality of UCI points, and the UCI can be mapped on the second time domain resource in the form of the UCI point groups.

[0278] In some embodiments, the interval between any two adjacent UCI point groups in the plurality of UCI point groups is the first interval, or in other words, the interval between any two adjacent UCI point groups in the plurality of UCI point groups is the same. In other words, the plurality of UCI point groups are uniformly mapped on the second time domain resource.

[0279] In some embodiments, the interval between the two adjacent UCI point groups in the plurality of UCI point groups is the first interval or the second interval, the difference between the first interval and the second interval is less than or equal to δ time domain resource units, one UCI point is carried in one time domain resource unit, and δ is a positive integer. In other words, the interval between the two adjacent UCI point groups in the plurality of UCI point groups is approximately equal, i.e., the first interval and the second interval are approximately equal.

[0280] Through the above implementation, based on the number of UCI point groups, the number of points included in the UCI point groups, and the number of points corresponding to the second time domain resource, it can be determined how the UCI and the data are interleaved and mapped. In this way, in the process of interleaving and mapping, the positions of all UCI point groups and / or all UCI points do not need to be directly indicated, thereby helping to reduce the signaling overhead.

[0281] It should be noted that the first interval and / or the second interval described above can refer to the interval between the time domain end position of the first UCI point group and the time domain start position of the second UCI point group, such as the time domain interval between the last point in the first UCI point group and the first point in the second UCI point group. The first interval and / or the second interval described above can also refer to the interval between the time domain start position of the first UCI point group and the time domain start position of the second UCI point group, such as the time domain interval between the first point in the first UCI point group and the first point in the second UCI point group; or the interval between the time domain end position of the first UCI point group and the time domain end position of the second UCI point group.

[0282] Hereinafter, the first interval and / or the second interval are introduced by taking an interval between a time-domain starting position of a first UCI sample group and a time-domain starting position of a second UCI sample group as an example. It should be noted that in the following introduction, the number of UCI samples included in each UCI sample group is the same.

[0283] Each UCI sample group includes UCI samples (assuming that the index of a UCI sample starts from 0 within the UCI sample group, and the index of the last UCI sample is ). Assuming that the UCI includes a total of UCI sample groups, the UCI includes a total of UCI samples (assuming that the index of a sample starts from 0, and the index of the last sample is N UCI -1).

[0284] Assuming that the composite sub-block includes a total of N comp samples, UCI sample groups are uniformly distributed on the time-domain resources corresponding to the N comp samples, that is, the interval between adjacent two UCI sample groups is equal, or the interval between adjacent two UCI sample groups is approximately equal.

[0285] For example, the UCI can include four UCI sample groups, denoted as group 0, group 1, group 2, and group 3. The interval between group 0 and group 1 is d0, the interval between group 1 and group 2 is d1, and the interval between group 2 and group 3 is d2.

[0286] If the interval between adjacent two UCI sample groups is completely equal, that is, , then the interval (that is, the first interval) between adjacent two groups can be:

[0287] wherein, represents rounding down.

[0288] If the interval between adjacent two UCI sample groups is the first interval d i or the second interval d j , and the difference between the first interval and the second interval is less than or equal to δ (which is a preset positive integer), that is, the interval between adjacent two UCI sample groups is approximately equal. Considering that the size relationship between the first interval and the second interval is uncertain, therefore, the difference between the first interval and the second interval being less than or equal to δ can mean that the absolute value of the difference between the first interval and the second interval is less than or equal to δ, as shown in the following formula:

[0289] Still taking the example that the UCI includes 4 sample point groups, the interval between the adjacent two UCI sample point groups is approximately equal, that is: i -d j |≤δ,0≤i,j≤2,i≠j.

[0290] The following introduces the determination manner of the index of each sample point in the UCI sample point group respectively for the case of uniform mapping of the UCI sample point group and the case of approximately uniform mapping.

[0291] In the case that the interval between the adjacent two UCI sample point groups is equal, the index of the 0th UCI sample point of the lth UCI sample point group in the composite sub-block is:

[0292] Wherein,

[0293] N rest It can be understood that the UCI sample point group is uniformly mapped on the N comp sample points in the second time domain resource, and the number of the remaining time domain resource units (or the number of the remaining sample points).

[0294] For example, N comp = 50, then N rest = 1.

[0295] If ε = 0, the index of the 0th sample point of group 0 in the composite sub-block is 0, the index of the 0th sample point of group 1 in the composite sub-block is 15, the index of the 0th sample point of group 2 in the composite sub-block is 30, and the index of the 0th sample point of group 3 in the composite sub-block is 45.

[0296] If ε = 1, the index of the 0th sample point of group 0 in the composite sub-block is 1, the index of the 0th sample point of group 1 in the composite sub-block is 16, the index of the 0th sample point of group 2 in the composite sub-block is 31, and the index of the 0th sample point of group 3 in the composite sub-block is 46.

[0297] In the case that the interval between the adjacent two UCI sample point groups includes a first interval and a second interval, the first interval can be The number of the first interval is ; the second interval can be The number of the second interval is N rest -1. And the index of the 0th sample point of group 0 in the composite sub-block is 0, and the index of the th sample point of group in the composite sub-block is N comp -1.

[0298] For example, the first interval of the UCI sample group Each interval is the first interval. Right now Then N rest Each interval is the second interval. Right now

[0299] For example, the first N in the interval of the UCI sample group rest Each interval is the second interval. then Each interval is the first interval.

[0300] It should be understood that the number of first intervals and the number of second intervals in the UCI sample group only need to meet the above requirements. The positions of the first intervals and the second intervals can also be other than the positions mentioned above, such as the first intervals and the second intervals being arranged in a cross pattern.

[0301] For example, still using N comp For example, if the value is 50, then... N rest =1, and d0=d1=15, while d2=16. At this time, the index of the 0th sample point of group 0 in the composite sub-block is 0, the index of the 0th sample point of group 1 in the composite sub-block is 15, the index of the 0th sample point of group 2 in the composite sub-block is 30, and the index of the 0th sample point of group 3 in the composite sub-block is 46.

[0302] For example, still using N comp For example, if the value is 50, then... N rest =1, and d0=16, while d1=d2=15. At this time, the index of the 0th sample point of group 0 in the composite sub-block is 0, the index of the 0th sample point of group 1 in the composite sub-block is 16, the index of the 0th sample point of group 2 in the composite sub-block is 31, and the index of the 0th sample point of group 3 in the composite sub-block is 46.

[0303] For example, still using N comp For example, if the value is 50, then... N rest =1, and d0=d2=15, d1=16. At this time, the index of the 0th sample point of group 0 in the composite sub-block is 0, the index of the 0th sample point of group 1 in the composite sub-block is 15, the index of the 0th sample point of group 2 in the composite sub-block is 31, and the index of the 0th sample point of group 3 in the composite sub-block is 46.

[0304] According to the method for determining the UCI sample index, the position of each UCI sample in the second time domain resource can be determined, so as to realize the mapping of the UCI.

[0305] If the UCI sample groups adopt the uniform mapping manner, based on the number of UCI sample groups, the number of samples included in the UCI sample groups, and the number of samples corresponding to the second time domain resource, how the UCI and the data are interleaved and mapped can be determined. In this way, in the above interleaving and mapping process, the positions of all UCI sample groups and / or all UCI samples do not need to be directly indicated, thereby helping to reduce the signaling overhead.

[0306] Similarly, if the UCI sample groups adopt the approximately uniform mapping manner, based on the number of UCI sample groups, the number of samples included in the UCI sample groups, the number of samples corresponding to the second time domain resource, the first interval, the second interval, and the positions (or the order) of the first interval and the second interval, how the UCI and the data are interleaved and mapped can be determined. In this way, in the above interleaving and mapping process, the positions of all UCI sample groups and / or all UCI samples do not need to be directly indicated, thereby helping to reduce the signaling overhead.

[0307] In some embodiments, the data can be mapped on the time domain resources corresponding to the samples other than the UCI samples within the composite sub-block.

[0308] In some embodiments, the time domain resources for transmitting the UCI and the data are also used for transmitting the PTRS, or the PTRS is placed in the time domain resources for transmitting the UCI and the data.

[0309] Based on the estimation result of the PTRS, the UCI and the data can be compensated for phase noise, which helps to reduce the influence of the phase noise on the demodulation result of the UCI and the data, thereby helping to improve the transmission performance of the UCI and the data. For example, in a phase noise scenario (such as a high-frequency communication scenario), by placing the PTRS in the transmission resources of the UCI and the data, the transmission performance of the UCI and the data can be improved.

[0310] Exemplarily, the PTRS is placed in the time domain resources for transmitting the UCI and the data, and if there are other time domain resources, such as GIs, between the time domain resources for transmitting the UCI and the time domain resources for transmitting the data, the PTRS is placed in the time domain resources for transmitting the UCI, the GIs, and the time domain resources for transmitting the data.

[0311] In the case where the second time domain resource is used for transmitting the UCI and the third time domain resource is used for transmitting the data, the second time domain resource and the third time domain resource are also used for transmitting the PTRS. In the case where the second time domain resource is used for transmitting the UCI and the data, the second time domain resource can be used for transmitting the PTRS.

[0312] Exemplarily, the PTRS can include a plurality of PTRS point groups, and each PTRS point group can include a plurality of PTRS points. Wherein, the PTRS is mapped on the time domain resource in the form of the PTRS point groups.

[0313] For example, the number of groups of the plurality of PTRS point groups and the number of PTRS points included in each PTRS point group of the plurality of PTRS point groups are associated with the size of the time domain resource used for transmitting the PTRS. That is, the number of groups of the PTRS point groups and the number of PTRS points included in each PTRS point group are associated with the sum of the sizes of the second time domain resource and the third time domain resource, or are associated with the size of the second time domain resource.

[0314] As an example, in the case that other resources are included between the second time domain resource and the third time domain resource, such as the other resources being used for a guard interval, the number of groups of the PTRS point groups and the number of PTRS points included in each PTRS point group are associated with the sum of the sizes of the second time domain resource, the third time domain resource and the other resources.

[0315] For another example, the mapping mode of the PTRS (or referred to as the mapping pattern of the PTRS) is associated with the size of the time domain resource used for transmitting the PTRS. That is, the mapping mode of the PTRS is associated with the sum of the sizes of the second time domain resource and the third time domain resource, or is associated with the size of the second time domain resource.

[0316] For the convenience of understanding, before introducing the mapping mode of the PTRS, the mapping manner (or referred to as the placement manner) of the PTRS in the related art is introduced.

[0317] In NR, when the DFT-s-OFDM waveform is adopted, the PTRS is placed in the form of point groups within the DFT input (i.e. s k Within, see the figure 2 mentioned above). The number of PTRS point groups is denoted as and each PTRS point group includes PTRS points. It should be noted that in NR, the DFT input does not contain the DMRS sequence.

[0318] In NR, and are related to the scheduling bandwidth (N RB ), as shown in Table 1.

[0319] Table 1

[0320] Referring to Table 1, N RBi , 0≤i≤4 is a series of preset thresholds.

[0321] Given and , the position of PTRS within DFT input (or called mapping pattern) and DFT size (i.e. DFT point number) , as shown in Table 2. denotes the number of subcarriers within one RB, in NR,

[0322] In NR, the mapping position of PTRS when DFT-s-OFDM waveform is adopted in PUSCH is shown in Table 2.

[0323] Table 2

[0324] In the embodiments of the present application, the number of PTRS sample groups and the number of PTRS samples within each PTRS sample group can be determined based on the time domain resources used for transmitting UCI and data.

[0325] Suppose the number of sample points contained in the time domain resources used for transmitting UCI and UL-SCH is N UCI,UL-SCH . If data is transmitted through the third time domain resource, then: N UCI,UL-SCH ≥ N UCI +N UL-SCH ;

[0326] wherein N UCI denotes the number of UCI samples contained in UCI, and N UL-SCH denotes the number of data samples contained in UL-SCH. In the case where there is GI between the time domain resources of UCI and UL-SCH, N UCI,UL-SCH >N UCI +N UL-SCH ; in the case where there is no GI between the time domain resources of UCI and UL-SCH, N UCI,UL-SCH =N UUI +N UL-SCH .

[0327] If data is transmitted through the second time domain resource, then N UCI,UL-SCH =N comp .

[0328] Exemplarily, the number of PTRS sample groups and the number of PTRS samples within each PTRS sample group placed in the time domain resources between UCI and UL-SCH can be determined based on N UCI,UL-SCH .

[0329] Table 3 gives an example of the relationship between the number of PTRS port groups and the number of PTRS ports in each PTRS port group and the time domain resources between UCI and UL-SCH.

[0330] Table 3

[0331] wherein N UCI,UL-SCH,i , 0≤i≤4 is a series of preset thresholds.

[0332] Generally, the more resources used to place the PTRS, the better the phase noise estimation performance.

[0333] As mentioned above, the mapping pattern of the PTRS (or referred to as the mapping style of the PTRS) is associated with the size of the time domain resources used to transmit the PTRS. Exemplarily, the mapping pattern of the PTRS can be determined according to N UCI,UL-SCH .

[0334] Exemplarily, the PTRS port groups can be evenly mapped on the transmission resources of UCI and data, such as the PTRS can be evenly mapped on the second time domain resources, or the PTRS can be evenly mapped on the second time domain resources and the third time domain resources. It should be understood that if there are other resources between the second time domain resources and the third time domain resources, such as time domain resources for GI, then the PTRS can be evenly mapped on the second time domain resources, the time domain resources for GI, and the third time domain resources.

[0335] Exemplarily, the PTRS port groups can be approximately evenly mapped on the transmission resources of UCI and data, such as the PTRS can be approximately evenly mapped on the second time domain resources, or the PTRS can be approximately evenly mapped on the second time domain resources and the third time domain resources. That is, the difference between the intervals of any two adjacent PTRS port groups is less than or equal to a preset number of time domain resource units.

[0336] Through the above implementation, based on the number of PTRS port groups, the number of ports in the PTRS port groups, and the number of ports corresponding to the resources used to transmit the PTRS, the mapping position of the PTRS port can be determined. In this way, it is not necessary to indicate the mapping position of each PTRS port group and / or each PTRS port, thereby helping to reduce the signaling overhead of indication.

[0337] In addition, the PTRS adopts an evenly mapped manner, which helps to improve the phase noise estimation performance.

[0338] Table 4 gives an example of the relationship between the mapping pattern of the PTRS and the time domain resources between UCI and UL-SCH.

[0339] Table 4

[0340] as shown in Table 4 and denote the floor and ceiling functions, respectively.

[0341] For another example, the PTRS can adopt other mapping modes. As one example, when and The index of the PTRS port can be:

[0342] where s = 1, 3 and k = 0, 1;

[0343] or:

[0344] sN UCI,UL-SCH +k; where,

[0345] As mentioned above, the PTRS and UCI, data mapping can be on the same time domain resource. As one possible implementation, the PTRS can be mapped first, and then other information such as UCI, data, or UCI, data and GI.

[0346] It should be noted that the time domain resources between the UCI and the UL-SCH mentioned in the embodiments of the present application can refer to the time domain resources for transmitting the UCI and the time domain resources for transmitting the UL-SCH. Alternatively, the time domain resources between the UCI and the UL-SCH can also refer to: the time domain resources for transmitting the UCI; the time domain resources for transmitting the UL-SCH; and other resources between the time domain resources for transmitting the UCI and the time domain resources for transmitting the UL-SCH, such as the time domain resources for GI.

[0347] FIG. 12 is an example diagram of a mapping pattern of a PTRS port group provided by the embodiments of the present application. Referring to FIG. 12, the UCI is transmitted through the second time domain resource, the data is transmitted through the third time domain resource, and there is a GI between the second time domain resource and the third time domain resource. Among them, the number of PTRS port groups and the number of PTRS ports included in the PTRS port group The PTRS port groups are uniformly distributed on the time domain resources shown in FIG. 12.

[0348] In some embodiments, at least one of the plurality of UCI point groups is adjacent to a PTRS point group of the plurality of PTRS point groups. At least one of the UCI point groups being adjacent to a PTRS point group can refer to one of the UCI point groups being adjacent to one of the PTRS point groups, or n of the UCI point groups being adjacent to n of the PTRS point groups, where n is an integer greater than 1. For example, the ith UCI point group is adjacent to the jth PTRS point group, where 1≤i≤n, 1≤j≤n, and i, j are positive integers.

[0349] For example, in a case where the second time domain resource is used for transmission of UCI and data, at least one of the plurality of UCI point groups is adjacent to a PTRS point group of the plurality of PTRS point groups.

[0350] For example, in a case where the mapping resource of the plurality of PTRS point groups is determined, and then the plurality of UCI point groups are mapped on the second time domain resource, the mapping resource of the UCI point group conflicts with the mapping resource of the PTRS point group. In this case, the UCI point group can be mapped at a position adjacent to the mapping resource of the PTRS point group, or in other words, the mapping resource of the UCI point group is adjacent to the mapping resource of the PTRS point group, i.e., the UCI point group is adjacent to the PTRS point group.

[0351] The above-mentioned mapping resource conflict can refer to, in the process of mapping the UCI point group according to the preset rule, the target time domain resource of the UCI point group partially or entirely overlaps with the target time domain resource of the PTRS point group. In this case, the target time domain resource of the PTRS point group can not be changed, and the target time domain resource of the UCI point group can be adjusted to avoid resource conflict. For example, the UCI point group can be mapped on a time domain resource adjacent to the target time domain resource of the PTRS point group with which the UCI point group conflicts.

[0352] For example, the UCI point group being adjacent to the PTRS point group can include the UCI point group being located to the left of the PTRS point group, the UCI point group being located to the right of the PTRS point group, or the UCI point group being located on one or more of the two sides of the PTRS point group.

[0353] Since the PTRS point group and the UCI point group are adjacent in the time domain, the phase noise estimation result of the PTRS is more accurate for UCI. Based on this, the above-mentioned method helps to improve the demodulation performance of UCI in a scenario with phase noise.

[0354] For example, assuming that the lth UCI sample group conflicts with the pth PTRS sample group, the new position of the lth UCI sample group can be one or more of the following: the new position of the lth UCI sample group is located to the left of the pth PTRS sample group; the new position of the lth UCI sample group is located to the right of the pth PTRS sample group; or the new position of the lth UCI sample group is located on both sides of the pth PTRS sample group.

[0355] When the new position of the lth UCI sample group is located on both sides of the pth PTRS sample group, the lth UCI sample group can be symmetrically placed on both sides of the pth PTRS sample group, or can be placed as symmetrically as possible on both sides of the pth PTRS sample group.

[0356] For example, when is odd, the difference between the number of UCI samples on the left and right sides of the pth PTRS sample group is less than a preset value. As an example, the number of UCI samples on the left side of the pth PTRS sample group can be and the number of UCI samples on the right side of the pth PTRS sample group can be Alternatively, the number of UCI samples on the left side of the pth PTRS sample group can be and the number of UCI samples on the right side of the pth PTRS sample group can be

[0357] It should be understood that the left side of the time domain resource mentioned in the embodiments of the present application can be understood as the time domain resource adjacent to the time domain resource and transmitted before the time domain resource; the right side of the time domain resource mentioned in the embodiments of the present application can be understood as the time domain resource adjacent to the time domain resource and transmitted after the time domain resource.

[0358] FIG. 13 is an example diagram of a PTRS and UCI mapping pattern provided by the embodiments of the present application.

[0359] Referring to FIG. 13, the first row shows the target time domain resource position of the PTRS, wherein, and It can be seen that the PTRS adopts an approximately uniform mapping manner. Among them, the interval d1 between the two adjacent PTRS sample groups in the 0th, 1st and 2nd PTRS sample groups is equal, and the difference between the interval d2 between the 2nd and 3rd PTRS sample groups and d1 is 2 time domain resource units.

[0360] Continuing to refer to FIG. 13, the second row shows the target time domain resource position of the UCI, and It can be seen that the UCI sample groups adopt a uniform mapping manner, wherein, the interval between any two adjacent UCI sample groups in the 0th UCI sample group, the 1st UCI sample group, the 2nd UCI sample group and the 3rd UCI sample group is equal, and is 16 time domain resource units.

[0361] As can be seen from FIG. 13, the target time domain resource of the PTRS conflicts with the target time domain resource of the UCI, that is, the 1st UCI sample group conflicts with the 1st PTRS sample group, and l = 0, 1, 2, 3.

[0362] Continuing to refer to FIG. 13, the third row and the fourth row respectively illustrate a solution to the resource conflict.

[0363] Referring to the third row in FIG. 13, the new position of the 0th UCI sample group is located to the right of the 0th PTRS sample group, the new position of the 1st UCI sample group is located to the right of the 1st PTRS sample group, the new position of the 2nd UCI sample group is located to the right of the 2nd PTRS sample group, and the new position of the 3rd UCI sample group is located to the left of the 3rd PTRS sample group.

[0364] Referring to the fourth row in FIG. 13, the new position of the 0th UCI sample group is located to the right of the 0th PTRS sample group, the new position of the 1st UCI sample group is located to the left and right of the 1st PTRS sample group, the new position of the 2nd UCI sample group is located to the left and right of the 2nd PTRS sample group, and the new position of the 3rd UCI sample group is located to the left of the 3rd PTRS sample group.

[0365] Through the above implementation, the interleaved mapping of the UCI and the data can be implemented while ensuring the phase noise estimation performance. In addition, the UCI is adjacent to the PTRS, which helps to improve the demodulation performance of the UCI in the presence of phase noise.

[0366] It is mentioned above that the UCI can include channel state information (CSI), and the CSI can include a first part of CSI and a second part of CSI. The first part of CSI includes information associated with the second part of CSI. For example, the first part of CSI includes information associated with the second part of CSI, which can be the number of information bits carried by the first part of CSI.

[0367] In some embodiments, the time domain resource carrying the first part of CSI is transmitted before the time domain resource carrying the second part of CSI. For example, in the case that the second time domain resource is used for transmitting UCI and the third time domain resource is used for transmitting data, the time domain resource carrying the first part of CSI is transmitted before the time domain resource carrying the second part of CSI. That is, the first part of CSI can be transmitted first and then the second part of CSI, which is helpful for the reception of the second part of CSI, as shown in FIG. 14.

[0368] Generally, the system requires that the block error rate of HARQ-ACK is not higher than 1%. The correct reception of HARQ information is helpful to improve the reliability of transmission.

[0369] Based on this, in some embodiments, in the case that the second time domain resource is not used for transmitting data, or in the case that the second time domain resource is used for transmitting UCI and the third time domain resource is used for transmitting data, if the UCI includes HARQ information, the time domain resource used for transmitting the HARQ information is located at the middle position of the second time domain resource.

[0370] For example, the HARQ information can include HARQ-ACK information and / or HARQ-NACK information.

[0371] For example, in the case that the second time domain resource is not used for transmitting data, it can be understood that the second time domain resource is only used for transmitting UCI. If there is data to be transmitted, other time domain resources, such as the third time domain resource, can be used. That is, UCI and data are transmitted by using time domain resources independent of each other.

[0372] This scheme is helpful to reduce the interference of DMRS and data on the HARQ-ACK / NACK information which is more important in UCI, thereby improving the demodulation performance of HARQ-ACK / NACK.

[0373] The above scheme will be described in detail below by taking the HARQ information as HARQ-ACK information as an example.

[0374] In some embodiments, the time domain resource used for transmitting the HARQ-ACK information is located at the middle position of the second time domain resource, which can mean that the time domain resource used for transmitting the HARQ-ACK information is located at the absolute middle position of the second time domain resource, as shown in FIG. 15(b) or FIG. 15(c).

[0375] The absolute middle position mentioned here can mean that the interval between the starting position of the time domain resource used for transmitting the HARQ-ACK and the starting position of the second time domain resource is equal to the interval between the ending position of the time domain resource used for transmitting the HARQ-ACK and the ending position of the second time domain resource.

[0376] Exemplarily, in the case that the UCI includes CSI and HARQ-ACK, if the number of samples contained in the first part of CSI is less than the number of samples contained in the second part of CSI, the first part of CSI is transmitted first, then a part of the second part of CSI is transmitted, followed by the transmission of HARQ-ACK, and finally the rest of the second part of CSI is transmitted, as shown in FIG. 15(b). Alternatively, the position relationship of the time domain resource carrying the first part of CSI, the time domain resource carrying the second part of CSI, and the time domain resource carrying HARQ-ACK is as shown in FIG. 15(b). This scheme can ensure that HARQ-ACK is strictly located in the middle of the UCI.

[0377] Exemplarily, in the case that the UCI includes CSI and HARQ-ACK, if the number of samples contained in the first part of CSI is greater than the number of samples contained in the second part of CSI, a part of the first part of CSI is transmitted first, then HARQ-ACK is transmitted, followed by the transmission of the rest of the first part of CSI, and finally the second part of CSI is transmitted, as shown in FIG. 15(c). Alternatively, the position relationship of the time domain resource carrying the first part of CSI, the time domain resource carrying the second part of CSI, and the time domain resource carrying HARQ-ACK is as shown in FIG. 15(c). This scheme can ensure that HARQ-ACK is strictly located in the middle of the UCI.

[0378] Alternatively, in some embodiments, in the case that the UCI includes CSI and HARQ-ACK, the time domain resource for transmitting HARQ-ACK information is located in the middle of the second time domain resource, which can mean that the time domain resource carrying HARQ-ACK is located between the time domain resource carrying the first part of CSI and the time domain resource carrying the second part of CSI. That is, the first part of CSI, HARQ-ACK, and the second part of CSI are transmitted in sequence, as shown in FIG. 15(a). Since the first part of CSI and the second part of CSI can contain different numbers of samples, in this case, the time domain resource carrying HARQ-ACK can be located in a non-absolute middle position of the second time domain resource.

[0379] Similarly, if the UCI includes HARQ-NACK, the time domain resource for transmitting HARQ-NACK information is located in the middle of the second time domain resource, thereby helping to improve the reception reliability of HARQ-NACK. The transmission mode of HARQ-NACK is similar to the transmission mode of HARQ-ACK mentioned above, and is not described here for brevity.

[0380] In the related art, when UCI is transmitted in PUSCH, UCI and UL-SCH use the same modulation order. For example, when UL-SCH samples use pi / 2-BPSK (or QPSK) modulation, UCI samples also use pi / 2-BPSK (or QPSK) modulation. Embodiments of the present application provide the following modulation scheme to improve the demodulation performance of UCI.

[0381] In some embodiments, when the modulation order of the data is greater than or equal to 4, the modulation scheme of the UCI corresponds to a constellation diagram composed of 4 points on the outermost circle of the constellation diagram corresponding to the modulation scheme of the data, or when the modulation order of the data is 1, the modulation order of the UCI is also 1 or the UCI uses Pi / 2-Binary Phase Shift Keying (BPSK) modulation; or when the modulation order of the data is greater than or equal to 2, the modulation order of the UCI is 2 or the UCI uses Quadrature Phase Shift Keying (QPSK) modulation, and the modulation result of the QPSK modulation is amplitude expanded according to an amplitude expansion factor, which is related to the modulation order of the data.

[0382] For example, when the data is modulated using 16-QAM, i.e., the modulation scheme of the data is 16-QAM and the modulation order is equal to 4, the modulation scheme of the UCI corresponds to a constellation diagram composed of 4 points on the outermost circle of the 16-QAM constellation diagram, as shown in FIG. 16.

[0383] For example, when the data is modulated using 16-QAM, i.e., the modulation scheme of the data is 16-QAM and the modulation order is equal to 4, the modulation scheme of the UCI corresponds to a constellation diagram composed of 4 points on the outermost circle of the 16-QAM constellation diagram, as shown in FIG. 16.

[0384] FIG. 16 is a 16-QAM constellation diagram provided by an embodiment of the present application. Referring to FIG. 16, the 16-QAM constellation diagram includes 16 points, of which the 4 points on the outermost circle of the 16-QAM constellation diagram have the maximum energy. Therefore, using the 4 points on the outermost circle of the constellation diagram to constitute the modulation constellation diagram of the UCI can improve the demodulation performance of the UCI without degrading the PAPR of the first symbol.

[0385] For example, when the modulation order of the data is greater than or equal to 2, the modulation order of the UCI is 2, i.e., the UCI uses QPSK modulation.

[0386] For example, amplitude expanding the modulation result of the QPSK modulation according to the amplitude expansion factor can be first modulating the bits carrying the UCI to obtain a QPSK symbol sequence, and then amplitude expanding the QPSK symbol sequence.

[0387] Exemplarily, the amplitude expansion factor is related to a modulation order of the data, and Table 5 gives an example of the amplitude expansion factor under a UL-SCH modulation scheme. For example, when the modulation order of the data is 2, the amplitude expansion factor is 1, and when the modulation order of the data is 4, the amplitude expansion factor is 3 / √5.

[0388] Table 5

[0389] Exemplarily, when the modulation order of the data is 1, the modulation order of the UCI is also 1 or the UCI adopts Pi / 2-Binary Phase Shift Keying (BPSK) modulation. When the modulation order of the data is 1, for example, the data adopts Pi / 2-BPSK modulation, and the UCI also adopts Pi / 2-BPSK modulation, which can avoid the adverse effect of the modulation order of the UCI on the PAPR of the first symbol, or in other words, help to avoid the bottleneck of the UCI on the PAPR of the first symbol.

[0390] In the embodiments of the present application, under the given modulation scheme of the data, by optimizing the modulation scheme design of the UCI, the demodulation performance of the UCI can be improved without deteriorating the PAPR of the first symbol.

[0391] It is mentioned above that the manner of determining the first time domain resource and the second time domain resource includes multiple manners.

[0392] In some embodiments, the first time domain resource and the second time domain resource can be determined based on the first information sent by the network device. Specifically, the terminal device can receive the first information sent by the network device, and correspondingly, the network device can send the first information to the terminal device. Further, the terminal device can determine the first time domain resource and the second time domain resource according to the first information.

[0393] Exemplarily, determining the first time domain resource can include one or more of determining the position of the first time domain resource, the size of the first time domain resource, the information that can be carried in the first time domain resource, or the mapping manner of the information carried in the first time domain resource.

[0394] Exemplarily, determining the second time domain resource can include one or more of determining the position of the second time domain resource, the size of the second time domain resource, the information that can be carried in the second time domain resource, or the mapping manner of the information carried in the second time domain resource.

[0395] In the case of the first time domain resource, the second time domain resource, and the third time domain resource in the first symbol, the first time domain resource, the second time domain resource, and the third time domain resource can be determined based on the first information sent by the network device. In this case, the first information can also be used to determine the third time domain resource.

[0396] Similarly, determining the third time-domain resource can comprise determining one or more of a location of the third time-domain resource, a size of the third time-domain resource, information that can be carried in the third time-domain resource, or a mapping manner of information carried in the third time-domain resource.

[0397] In a case where a guard interval is included in the first symbol, the first information can be further used to determine the guard interval in the first symbol, such as one or more of a location, a size, information carried by the guard interval, and a mapping manner of information carried by the guard interval.

[0398] Exemplarily, the location of the guard interval can be one or more of: between the first time-domain resource and the second time-domain resource; between the second time-domain resource and the third time-domain resource; before the first time-domain resource; after the second time-domain resource; or after the third time-domain resource.

[0399] In a case where a guard interval is included between adjacent first symbols, the first information can be further used to determine the guard interval between the adjacent first symbols, such as one or more of a size, information carried by the guard interval, and a mapping manner of information carried by the guard interval.

[0400] In a case where the first symbol is used to carry the PTRS, the first information can be further used to indicate a mapping manner of the PTRS.

[0401] Exemplarily, the first information can be further used to indicate a modulation manner of information carried by the first symbol, such as a modulation manner of the UCI, a modulation manner of the data, and the like.

[0402] The first information can be used to determine one or more of the above. In other words, the first information can be used to determine the first symbol, such as a resource configuration of the first symbol; whether to include a guard interval (such as an inter-symbol guard interval and / or an inter-sub-block guard interval); a size, a location, and a content of the guard interval; a mapping manner of the PTRS; or a modulation manner of information carried by the first symbol, and the like. The resource configuration of the first symbol can refer to time-domain resources included in the first symbol (such as one or more of the first time-domain resource, the second time-domain resource, and the third time-domain resource), and information related to these time-domain resources (see the introduction in the above).

[0403] In some embodiments, the first information can be used to indicate one or more of: a size and a location of the first time-domain resource; information carried by the first time-domain resource; a mapping manner of the information carried by the first time-domain resource; a size and a location of the second time-domain resource; information carried by the second time-domain resource; a mapping manner of the information carried by the second time-domain resource; whether the second time-domain resource is used to transmit data; whether the first symbol comprises a third time-domain resource; information carried by the third time-domain resource; a mapping manner of the third time-domain resource; a modulation manner of the information carried by the first symbol; a number of guard intervals comprised by the first symbol; a type of the guard intervals; a length (or size) of the guard intervals; a location of the guard intervals; or a content of the guard intervals.

[0404] wherein the second time-domain resource is used to transmit data, i.e. the case that the second time-domain resource is used to transmit both UCI and data as mentioned above, the second time-domain resource is not used to transmit data, i.e. the case that the second time-domain resource is used to transmit UCI and the third time-domain resource is used to transmit data as mentioned above.

[0405] Alternatively, the first information can be used to indicate one or more of: a size and a location of a DMRS subblock, a mapping manner of the DMRS, a size and a location of a UCI subblock, a mapping manner of the UCI, a size and a location of an UL-SCH subblock, a mapping manner of the data, a size and a location of a GI, or a content of the GI.

[0406] For example, the information is mapped on the time-domain resource in the form of sample groups, the mapping manner indicated in the first information can comprise one or more of: a number of sample groups, a number of samples comprised in a sample group, or a mapping location of each sample group on the time-domain resource.

[0407] For example, the mapping manner of the UCI can comprise a number of UCI sample groups, a number of UCI samples comprised in a UCI sample group, or a mapping location of the UCI sample group on the second time-domain resource, etc. As mentioned above, in order to save the indication overhead, the UCI sample groups can adopt a uniform or approximately uniform mapping pattern. In this case, the first information can be used to indicate a spacing between the UCI sample groups, such as the first spacing mentioned above, or the first spacing and the second spacing.

[0408] Alternatively, a relationship between a size of the second time-domain resource and a number of UCI sample groups, a number of samples comprised in a UCI sample group can be preconfigured or predefined, thereby helping to further reduce the signaling overhead. In addition, a configuration manner of the spacing between the UCI sample groups can be preconfigured or predefined, and by indexing or identifying the configuration manner of the spacing applied by the first symbol, the signaling overhead can be reduced.

[0409] Exemplarily, the mapping manner of the PTRS can include a number of PTRS point groups, a number of PTRS points included in a PTRS point group, or a mapping position of the PTRS point group on a time domain resource, etc. As mentioned above, in order to save indication overhead, the PTRS point groups can adopt a uniform or approximately uniform mapping pattern. In this case, the first information can be used to indicate the interval between the PTRS point groups.

[0410] Optionally, the relationship between the size of the resource used for transmitting the PTRS, the number of PTRS point groups, and the number of PTRS points included in a PTRS point group can be preconfigured or predefined, as shown in Table 3 mentioned above. In this case, the terminal device can determine the number of PTRS point groups and the number of PTRS points included in a PTRS point group according to a preset threshold, thereby helping to reduce signaling overhead.

[0411] Optionally, the relationship between the size of the resource used for transmitting the PTRS, the number of PTRS point groups, and the number of PTRS points included in a PTRS point group, and the mapping position (or referred to as the mapping pattern) of the PTRS point group can be preconfigured or predefined, as shown in Table 4 mentioned above, thereby helping to reduce signaling overhead.

[0412] Exemplarily, the mapping pattern of the PTRS point group can be determined in combination with the size of the resource used for transmitting the PTRS, the above-mentioned Table 3 and Table 4. In this case, only the size of the resource used for transmitting the PTRS needs to be indicated, thereby helping to reduce signaling overhead.

[0413] The position of the time domain resource can refer to an absolute position of the time domain resource, and the position information of the time domain resource can include a starting position of the time domain resource and an ending position of the time domain resource.

[0414] Alternatively, the position of the time domain resource can refer to a relative position of the time domain resource, such as a relative position relationship between the above-mentioned multiple time domain resources. For example, the first symbol successively includes the first time domain resource, the second time domain resource, and the third time domain resource.

[0415] The size of the time domain resource can refer to the length of the time domain resource, or the duration of the time domain resource.

[0416] Exemplarily, the absolute position of the time domain resource can be determined according to the relative position of the time domain resource and the size of the time domain resource. In the case that there is a guard interval in the first symbol, the resource distribution in the first symbol can be determined according to the relative position of the time domain resource, the position of the guard interval, and the size of the time domain resource. It should be understood that the position of the guard interval mentioned here can be replaced by the relative position of the guard interval and the length of the guard interval.

[0417] Exemplarily, the content of the guard interval can include a fixed sequence or samples. The samples included in the guard interval can be samples before modulation or samples after modulation. For example, the first information can indicate the content of the guard interval by the type, number and position of the samples.

[0418] It is mentioned above that the guard interval can include an inter-subblock. It is considered that the conventional CP overhead in the related art is about 7% (specifically, 9 / 128). In the embodiments of the present application, the size of the guard interval, such as the number of samples included in the guard interval, can be determined based on the overhead (resource overhead) of 7%, thereby helping to avoid interference between different subblocks. As an example, the modulation input or the modulation output contains N samples, and the length of the inter-subblock can be

[0419] In some embodiments, the content of the guard interval can be a CP, a cyclic postfix, or a fixed sequence such as a 0 sequence.

[0420] Exemplarily, the first indication information can be dynamically adjusted according to the use scenario or requirement, thereby helping to improve the flexibility of the system.

[0421] For example, considering a low-frequency communication scenario, the first symbol can not carry a PTRS, and in this case, the first information does not include information related to the PTRS.

[0422] For example, considering a high-frequency communication scenario, the first symbol can carry a PTRS, and in this case, the first information includes information related to the PTRS.

[0423] For example, in the case where the channel frequency domain flatness for transmitting the first symbol is good, the inter-block interference between adjacent time domain resources (such as the first time domain resource and the second time domain resource) is small. In this case, the length of the guard interval can be small, thereby reducing the resource overhead of the guard interval while meeting the performance requirement.

[0424] For example, the channel frequency domain flatness for transmitting the first symbol is poor, that is, the frequency selective fading is strong. In this case, the length of the guard interval can be large to reduce the inter-block interference between the adjacent two time domain resources.

[0425] The different designs of inter-subblock can have certain impacts on the receiver. In order to reduce the complexity of demodulation and the processing delay of demodulation, in the case that the second time domain resource is used for transmitting UCI and the third time domain resource is used for transmitting data, the GI in the embodiment of the present application can be CP. In this case, the DMRS, the UCI and the data can be demodulated by independent FFT windows. Compared with the related art in which one window is used to demodulate the DMRS, the UCI and the data, the FFT window is smaller, which helps to reduce the complexity of demodulation. Meanwhile, the UCI and the data can be independently demodulated, which helps to reduce the receiving delay of the UCI.

[0426] FIG. 17 is an example diagram of a demodulation scheme of a first symbol provided by the embodiment of the present application. Referring to FIG. 17, the first symbol includes a DMRS subblock, a UCI subblock and an UL-SCH subblock in sequence, wherein the GI between the DMRS and the UCI is the CP of the UCI, the GI between the UCI and the UL-SCH is the CP of the UL-SCH, and the inter-symbol GI in front of the PUSCH is the CP of the DMRS.

[0427] As shown in FIG. 17, the related art uses FFT window 1 to demodulate the first symbol, which has high demodulation complexity; in the embodiment of the present application, FFT window 3, FFT window 4 and FFT window are used to demodulate the DMRS, the UCI and the UL-SCH respectively, which helps to reduce the complexity of demodulation and meanwhile helps to reduce the demodulation delay of the UCI.

[0428] The method embodiments provided by the present application are described above, and the device embodiments provided by the present application will be described below. It should be understood that the description of the device embodiments corresponds to the description of the method embodiments, and therefore, the content not described in detail can be referred to the method embodiments described above, which will not be described here in detail for the sake of brevity.

[0429] FIG. 18 is a schematic block diagram of a communication device provided by the embodiment of the present application. As shown in FIG. 18, the communication device 1800 can include a transceiver unit 1810 and / or a processing unit 1820. The transceiver unit 1810 can implement corresponding communication functions, and the processing unit 1820 is used for data processing. The transceiver unit 1810 can also be referred to as a communication interface or a communication unit. Optionally, the device 1800 can also include a storage unit, which can be used to store instructions and / or data, and the processing unit 1820 can read the instructions and / or data in the storage unit, so that the device implements the foregoing method embodiments.

[0430] In a possible design, the apparatus 1800 can be a terminal device in the above method embodiments, or can be a chip, processor or chip system for implementing terminal device functions. The apparatus 1800 can be used to perform steps or processes performed by the terminal device in any of the above method embodiments.

[0431] Specifically, the processing unit 1820 can be configured to determine a first time domain resource for transmitting a demodulation reference signal (DMRS) and a second time domain resource for transmitting uplink control information (UCI), the first time domain resource and the second time domain resource being located in a same symbol. The transceiver unit 1810 can be configured to transmit the symbol by a physical uplink shared channel (PUSCH) adopting a single carrier waveform.

[0432] In some embodiments, the symbol further includes a third time domain resource for transmitting data, or the second time domain resource is further for transmitting the data, and the UCI is interleaved with the data on the second time domain resource.

[0433] In some embodiments, there is a guard interval between any two adjacent time domain resources of the first time domain resource, the second time domain resource and the third time domain resource, or there is a guard interval between the first time domain resource and the second time domain resource.

[0434] In some embodiments, the second time domain resource is further for transmitting data, and the UCI is interleaved with the data on the second time domain resource, and the UCI includes a plurality of UCI sample groups, where: a gap between any two adjacent UCI sample groups of the plurality of UCI sample groups is a first gap, or a gap between two adjacent UCI sample groups of the plurality of UCI sample groups is a first gap or a second gap, a difference between the first gap and the second gap is less than or equal to δ time domain resource units, one UCI sample is carried in one time domain resource unit, and δ is a positive integer.

[0435] In some embodiments, the second time domain resource is further for transmitting a phase tracking reference signal (PTRS), or the second time domain resource and the third time domain resource are further for transmitting a PTRS, and the PTRS includes a plurality of PTRS sample groups, where: a number of the plurality of PTRS sample groups and a number of PTRS samples included in each PTRS sample group of the plurality of PTRS sample groups are associated with a sum of sizes of the second time domain resource and the third time domain resource, or are associated with a size of the second time domain resource.

[0436] In some embodiments, the UCI includes a plurality of UCI point groups, at least one of the plurality of UCI point groups is adjacent to a PTRS point group of the plurality of PTRS point groups.

[0437] In some embodiments, the UCI includes channel state information (CSI), the CSI includes a first part of CSI and a second part of CSI, the first part of CSI includes information associated with the second part of CSI, wherein time domain resources carrying the first part of CSI are transmitted earlier than time domain resources carrying the second part of CSI.

[0438] In some embodiments, the second time domain resources are not used for transmitting data, the UCI includes hybrid automatic repeat request (HARQ) information, time domain resources used for transmitting the HARQ information are located in a middle position of the second time domain resources.

[0439] In some embodiments, the symbol is also used for transmitting data, the processing unit 1820 is further configured to: when a modulation order of the data is greater than or equal to 4, a constellation corresponding to a modulation scheme of the UCI is composed of 4 outermost points of a constellation corresponding to a modulation scheme of the data, or when the modulation order of the data is 1, a modulation order of the UCI is also 1 or the UCI adopts Pi / 2-BPSK modulation; or when the modulation order of the data is greater than or equal to 2, the modulation order of the UCI is 2 or the UCI adopts QPSK modulation, and a result of the QPSK modulation is amplitude expanded according to an amplitude expansion factor related to the modulation order of the data.

[0440] In some embodiments, the determining the first time domain resources and the second time domain resources includes: receiving first information, and determining the first time domain resources and the second time domain resources based on the first information; wherein the first information is used to indicate one or more of: a size and a position of the first time domain resources; a size and a position of the second time domain resources; whether the second time domain resources are used for transmitting data; a length of a guard interval; a position of the guard interval; or content of the guard interval.

[0441] In a possible design, the apparatus 1800 can be a network device in the above method embodiments, or can be a chip, processor or chip system for implementing network device functions. The apparatus 1800 can be used to execute steps or procedures performed by the network device in any of the above method embodiments.

[0442] In particular, the transceiver 1810 can be configured to receive a symbol via a physical uplink shared channel (PUSCH), the PUSCH employing a single carrier waveform. The symbol includes a first time domain resource for transmitting a demodulation reference signal (DMRS) and a second time domain resource for transmitting uplink control information (UCI).

[0443] In some embodiments, the symbol further includes a third time domain resource for transmitting data, or the second time domain resource is further for transmitting the data, and the UCI is interleaved with the data on the second time domain resource.

[0444] In some embodiments, there is a guard interval between any two adjacent time domain resources among the first time domain resource, the second time domain resource, and the third time domain resource, or there is a guard interval between the first time domain resource and the second time domain resource.

[0445] In some embodiments, the second time domain resource is further for transmitting data, and the UCI is interleaved with the data on the second time domain resource, the UCI including a plurality of UCI sample groups, wherein: a gap between any two adjacent UCI sample groups in the plurality of UCI sample groups is a first gap, or a gap between two adjacent UCI sample groups in the plurality of UCI sample groups is a first gap or a second gap, a difference between the first gap and the second gap being less than or equal to δ time domain resource units, one UCI sample being carried in one time domain resource unit, and δ being a positive integer.

[0446] In some embodiments, the second time domain resource is further for transmitting a phase tracking reference signal (PTRS), or the second time domain resource and the third time domain resource are further for transmitting a PTRS, the PTRS including a plurality of PTRS sample groups, wherein: a number of the plurality of PTRS sample groups and a number of PTRS samples included in each PTRS sample group in the plurality of PTRS sample groups are associated with a sum of sizes of the second time domain resource and the third time domain resource, or are associated with a size of the second time domain resource.

[0447] In some embodiments, the UCI includes a plurality of UCI sample groups, at least one UCI sample group in the plurality of UCI sample groups being adjacent to a PTRS sample group in the plurality of PTRS sample groups.

[0448] In some embodiments, the UCI includes channel state information (CSI), the CSI includes a first part of CSI and a second part of CSI, the first part of CSI includes information associated with the second part of CSI, wherein time domain resources carrying the first part of CSI are transmitted earlier than time domain resources carrying the second part of CSI.

[0449] In some embodiments, the second time domain resources are not used for transmitting data, the UCI includes hybrid automatic repeat request (HARQ) information, and time domain resources used for transmitting the HARQ information are located in a middle position of the second time domain resources.

[0450] In some embodiments, the processing unit 1820 is further configured to send first information, the first information being used for determining the first time domain resources and the second time domain resources, wherein the first information is used for indicating one or more of the following: a size and a position of the first time domain resources; a size and a position of the second time domain resources; whether the second time domain resources are used for transmitting data; a length of a guard interval; a position of the guard interval; or content of the guard interval.

[0451] It should be understood that the "unit" in the apparatus 1800 can be implemented by hardware, or implemented by software, or implemented by hardware executing corresponding software. For example, the "unit" can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (for example, a shared processor, a dedicated processor, or a group processor) and a memory for executing one or more software or firmware programs, a combination logic circuit, and / or other suitable components supporting the described functions. For another example, the transceiver unit 1810 can be replaced by a transceiver circuit (for example, which can include a receiving circuit and a transmitting circuit), and the processing unit 1820 can be replaced by a processor or a processing circuit.

[0452] FIG. 19 is a schematic block diagram of another communication apparatus provided by embodiments of the present application. The communication apparatus 1900 can be a terminal device / network device, or a chip, a chip system, or a processor, etc. implemented in a terminal device / network device and used to implement the methods described in the above method embodiments. The apparatus can be used to implement the methods described in the above method embodiments, and specific descriptions can be referred to the descriptions in the above method embodiments.

[0453] The communication device 1900 can include one or more processors 1910, which can also be referred to as processing units, and can implement certain control functions. The processor 1910 can be a general processor or a special purpose processor, etc. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device, execute software programs, and process data of the software programs.

[0454] In an alternative design, the processor 1910 can also store instructions and / or data, which can be executed by the processor 1910, so that the communication device 1900 performs the methods described in the above method embodiments.

[0455] In another alternative design, the communication device 1900 can include a communication interface 1920 for implementing receiving and transmitting functions. For example, the communication interface 1920 can be a transceiver circuit, an interface, an interface circuit, or a transceiver, etc. The transceiver circuit, the interface, the interface circuit, or the transceiver for implementing receiving and transmitting functions can be separate or integrated together. The above transceiver circuit, the interface, the interface circuit, or the transceiver can be used for reading and writing of codes / data, or the above transceiver circuit, the interface, the interface circuit, or the transceiver can be used for transmission or transfer of signals.

[0456] Optionally, the communication device 1900 can include one or more memories 1930, which can store instructions that can be executed by the processor 1910, so that the communication device 1900 performs the methods described in the above method embodiments. Optionally, the memory 1930 can also store data. Optionally, the processor 1910 can also store instructions and / or data. The processor 1910 and the memory 1930 can be separately provided or integrated together.

[0457] It should be understood that in a possible design, the steps in the method embodiments provided by the embodiments of the present application can be completed by integrated logic circuits of hardware in the processor or instructions in the form of software. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as being completed by a hardware processor, or completed by a combination of hardware and software modules in the processor. The software modules can be located in random access memories, flash memories, read-only memories, programmable read-only memories, or electrically erasable programmable memories, registers, or other mature storage media in the art. The storage medium is located in the memory, and the processor reads information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.

[0458] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with a signal processing capability. In the implementation process, the steps of the above method embodiments can be completed by an integrated logic circuit or an instruction in the form of software in the processor. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0459] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM). It should be noted that the memory of the system and method described herein is intended to include but not limited to these and any other suitable types of memory.

[0460] The embodiments of the present application further provide a computer program product, which comprises computer program codes, and when the computer program codes are run on a computer, the computer is enabled to perform each step or procedure performed by the terminal device / network device in any of the above method embodiments.

[0461] The embodiments of the present application further provide a computer readable storage medium, which stores program codes, and when the program codes are run on a computer, the computer is enabled to perform each step or procedure performed by the terminal device / network device in any of the above method embodiments.

[0462] The embodiments of the present application further provide a communication apparatus, which comprises a processor and an interface for sending and / or receiving signals, so that the processor performs each step or procedure performed by the terminal device / network device in any of the above method embodiments.

[0463] Each of the above apparatus embodiments and method embodiments fully corresponds, and the corresponding steps are performed by the corresponding modules or units, for example, the steps of receiving or sending in the method embodiments are performed by the communication unit or the communication interface, and the other steps except for sending and receiving can be performed by the processing unit or the processor.

[0464] In the embodiments of the present application, each term and English abbreviation is an exemplary example given for convenience of description, and should not constitute any limitation to the present application. The embodiments of the present application do not exclude the possibility of defining other terms capable of realizing the same or similar functions in the existing or future protocols.

[0465] The terms "component", "module", "system", and the like used in the present specification are used to represent computer-related entities, hardware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and / or thread of execution, and a component can be localized on one computer and / or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components can communicate by way of local and / or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and / or across a network such as the Internet with other systems via the signal), by way of the data packets, and / or by way of other signals in the various embodiments.

[0466] Those of skill in the art would understand that the various illustrative logical blocks and steps described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or combinations of both. The disclosure is not limited to implementations set forth herein for the sake of providing an overall understanding of architectures, suitability, and alternatives thereof. Those of skill would further understand that the functionality of various illustrative logical blocks and steps can be carried out by one or more electrical circuits, microprocessors, or gate arrays designed with source or object code, by a programmed processor, such as an ASIC or other microprocessor, or by a combination of both. Consequently, the disclosure is not limited to particular logical blocks or steps, whether described herein or otherwise, unless such limitations are expressly conferred. In the claims, the use of "including", "containing", "having" or "with" are not meant to be interpreted as consisting exclusively of, or containing only those statutory elements or steps necessary to practice the disclosure. Additional or fewer elements or steps can or are expressly contemplated and expected by those of skill in the art.

[0467] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the system, device and unit described above can be based on the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0468] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0469] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0470] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0471] In the above embodiments, the functions of the various functional units can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, the software can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are wholly or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another, for example, the computer instructions can be transferred from one website, computer, server or data center to another via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, DVD), or semiconductor media (for example, solid state disk (SSD)) and the like.

[0472] The functions, if implemented in the form of software functional units and sold or used as independent products, can be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application essentially or say the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0473] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: Comprising: determining a first time domain resource and a second time domain resource, the first time domain resource being used for transmitting a demodulation reference signal (DMRS), the second time domain resource being used for transmitting uplink control information (UCI), the first time domain resource and the second time domain resource being located in a same symbol; transmitting the symbol through a physical uplink shared channel (PUSCH) adopting a single carrier waveform.

2. The method of claim 1, wherein, the symbol further comprising a third time domain resource, the third time domain resource being used for transmitting data; or the second time domain resource being further used for transmitting the data, the UCI being interleaved mapped on the second time domain resource with the data.

3. The method of claim 2, wherein, a guard interval existing between any two adjacent time domain resources among the first time domain resource, the second time domain resource and the third time domain resource, or a guard interval existing between the first time domain resource and the second time domain resource.

4. The method according to claim 2 or 3, characterized in that, the second time domain resource being further used for transmitting data, the UCI being interleaved mapped on the second time domain resource with the data, the UCI comprising a plurality of UCI sample groups, wherein: a first interval existing between any two adjacent UCI sample groups among the plurality of UCI sample groups, or a first interval or a second interval existing between any two adjacent UCI sample groups among the plurality of UCI sample groups, a difference between the first interval and the second interval being less than or equal to δ time domain resource units, one UCI sample being carried in one time domain resource unit, δ being a positive integer.

5. The method according to any one of claims 2-4, characterized in that, the second time domain resource being further used for transmitting a phase tracking reference signal (PTRS), or the second time domain resource and the third time domain resource being further used for transmitting a PTRS, the PTRS comprising a plurality of PTRS sample groups, wherein: a number of the plurality of PTRS sample groups and a number of PTRS samples included in each PTRS sample group among the plurality of PTRS sample groups being associated with a sum of sizes of the second time domain resource and the third time domain resource, or being associated with a size of the second time domain resource.

6. The method of claim 5, wherein, the UCI comprising a plurality of UCI sample groups, at least one UCI sample group among the plurality of UCI sample groups being adjacent to a PTRS sample group among the plurality of PTRS sample groups.

7. The method according to any one of claims 1 to 6, characterized in that, the UCI comprising channel state information (CSI), the CSI comprising a first part of CSI and a second part of CSI, the first part of CSI comprising information associated with the second part of CSI, wherein time domain resource carrying the first part of CSI is transmitted earlier than time domain resource carrying the second part of CSI.

8. The method according to any one of claims 1-7, characterized in that, the second time domain resource not being used for transmitting data, the UCI comprising hybrid automatic repeat request (HARQ) information, time domain resource used for transmitting the HARQ information being located in a middle position of the second time domain resource.

9. The method according to any one of claims 1-8, characterized in that, the symbol being further used for transmitting data, the method further comprising: when a modulation order of the data is greater than or equal to 4, a constellation corresponding to a modulation scheme of the UCI being constituted by 4 outermost points of a constellation corresponding to a modulation scheme of the data, or When the modulation order of the data is 1, the modulation order of the UCI is also 1 or the UCI adopts Pi / 2-binary phase shift keying (BPSK) modulation; or When the modulation order of the data is greater than or equal to 2, the modulation order of the UCI is 2 or the UCI adopts quadrature phase shift keying (QPSK) modulation, and the modulation result of the QPSK modulation is amplitude expanded according to an amplitude expansion factor related to the modulation order of the data.

10. The method according to any one of claims 1-9, characterized in that, The determining the first time domain resource and the second time domain resource comprises: receiving first information, and determining the first time domain resource and the second time domain resource based on the first information; The first information is used to indicate one or more of the following: the size and position of the first time domain resource; the size and position of the second time domain resource; whether the second time domain resource is used to transmit data; the length of the guard interval; the position of the guard interval; or the content of the guard interval.

11. A communications device, characterized by The apparatus comprises at least one processor and at least one memory; The at least one memory is used to store computer programs or instructions; The at least one processor is used to execute part or all of the computer programs or instructions in the at least one memory, so that the method in any one of claims 1-10 is executed.

12. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer programs or instructions, and when the computer reads and executes the computer programs or instructions, the method in any one of claims 1-10 is executed.

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