Communication method and device and computer readable storage medium

Abstract

The invention relates to a communication system, in particular to a communication method and device and a computer readable storage medium, and the method comprises the steps: determining a first time domain resource position of a first DMRS and a time domain resource position of a CRS, and the time domain resource position of the CRS is overlapped with the first time domain resource position; the first time domain resource position is moved backwards N times to obtain a second time domain resource position, the second time domain resource position is not overlapped with the time domain resource position of the CRS, and N is a positive integer; the first DMRS is an FL DMRS, or the first DMRS comprises a first column DMRS and an additional DMRS; and receiving the first DMRS at the second time domain resource position. According to the embodiment of the invention, the success rate of data transmission can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of wireless communications, and in particular, to a communication method, device, and computer-readable storage medium. Background Art

[0002] Currently, the physical downlink shared channel (PDSCH) has two resource mapping types: mapping Type A and mapping Type B. The demodulation reference signal (DMRS) can be used for channel estimation during PDSCH demodulation. The terminal device can determine the time domain position of PDSCH and DMRS based on the indication information of the network device and the radio resource control (RRC) parameters.

[0003] For Type B PDSCH DMRS, it may collide with the reserved resource of CORESET associated with a search space set (SS set). The current DMRS movement rule for Type B PDSCH DMRS and LTE cell-specific reference signals (CRS) symbol level collision is that the DMRS and CRS collision judgment is executed once, that is, the terminal device receives a downlink control information (DCI) scheduling a PDSCH, and at least one PDSCH DMRS symbol collides with the CRS symbol configured by the RRC parameters, then all DMRS positions contained in all time slots where this PDSCH is located can be increased by 1. However, this method will cause interference between data transmissions and affect the correct reception of data. Summary of the invention

[0004] The embodiments of the present application provide a communication method, an apparatus, and a computer-readable storage medium, which can improve the success rate of data transmission.

[0005] In a first aspect, the present application provides a communication method, which can be applied to a terminal device, or to an apparatus in a terminal device (for example, a chip, or a chip system, or a circuit), or to an apparatus that can be used in combination with a terminal device, and is described below by taking the application to a terminal device as an example. The method may include: determining a first time domain resource position of a first DMRS and a time domain resource position of a CRS, the time domain resource position of the CRS overlaps with the first time domain resource position, the first time domain resource position may be shifted back N times to obtain a second time domain resource position, the second time domain resource position does not overlap with the time domain resource position of the CRS, and N is a positive integer. The first DMRS is a front-loaded (FL) DMRS or the first DMRS includes an FL DMRS and an additional DMRS; the first DMRS is received at the second time domain resource position.

[0006] In the embodiment of the present application, unlike the prior art, since the time domain resource position of DMRS overlaps with the time domain resource position of CRS, the terminal device shifts the time domain resource position of DMRS once. If the time domain resource position of DMRS after shifting once still overlaps with the time domain resource position of CRS, it will continue to cause CRS and DMRS to interfere with each other, and the channel estimation of the terminal device is inaccurate, resulting in PDSCH transmission failure. In this embodiment, since the time domain resource position of DMRS overlaps with the time domain resource position of CRS, the terminal device will shift the time domain resource position of DMRS to a time domain resource position that does not overlap with the time domain resource position of CRS, thereby improving the transmission success rate.

[0007] Here, shifting once can be understood as adding 1 to the symbol index corresponding to the time domain resource position.

[0008] In a possible implementation manner, the method may further include: receiving first indication information and second indication information, the first indication information indicating resource information of a PDSCH of mapping type B, and the second indication information indicating a time domain resource position of a CRS.

[0009] A possible implementation method is to receive the first indication information and the second indication information on the NR carrier, and the time domain resource position of the CRS is located in the overlapping area of ​​the NR carrier and the LTE carrier.

[0010] A possible implementation method, N>1, shifts the first time domain resource position back N times to obtain the second time domain resource position, including: shifting the first time domain resource position back 1 time to obtain the third time domain resource position; when the third time domain resource position overlaps with the time domain resource position of CRS, shifting the third time domain resource position back N-1 times to obtain the second time domain resource position.

[0011] In a possible implementation manner, the method may further include: receiving third indication information and fourth indication information, the third indication information indicating the time-frequency resource position of the control resource set CORESET, and the fourth indication information indicating the frequency domain resource position of the first DMRS.

[0012] A possible implementation method, N=1, shifting the first time domain resource position back N times to obtain the second time domain resource position, including: when the first time domain resource position overlaps with the time domain resource position of CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET, shifting the first time domain resource position back 1 time to obtain the second time domain resource position.

[0013] Different from the prior art, when DMRS overlaps with the time-frequency resource positions of CRS and CORESET at the same time, different execution orders may cause the terminal device to first determine whether CRS collides or CORESET collides, resulting in different execution results, resulting in different positions of PDSCH DMRS movement, causing network equipment and terminal equipment to have different understandings of the position of DMRS after PDSCH DMRS moves due to collision, resulting in the terminal device failing to receive PDSCH. In this embodiment, the movement rules of DMRS when DMRS overlaps with the time-frequency resource positions of CRS and CORESET at the same time are clarified, which can solve the problem in NR and LTE DSS scenarios, when DMRS overlaps with the time-frequency resource positions of CRS and CORESET at the same time, ensuring that the terminal device and the network device have a consistent understanding of the movement of the time domain resource position of DMRS due to the overlap of the time-frequency resource position, thereby improving the transmission success rate.

[0014] A possible implementation method, N>1, shifting the first time domain resource position back N times to obtain a second time domain resource position, including: when the first time domain resource position overlaps with the time domain resource position of CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET, shifting the first time domain resource position back 1 time to obtain a third time domain resource position; when one or more of the following conditions are met, shifting the third time domain resource position back N-1 times to obtain the second time domain resource position: the third time domain resource position overlaps with the time domain resource position of CRS; the third time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET; the third time domain resource position overlaps with the time domain resource position of CRS, and the third time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET.

[0015] In a possible implementation, the resource information of the PDSCH includes the fourth time domain resource position of the first DMRS; determining the first time domain resource position of the first DMRS includes: determining the fourth time domain resource position as the first time domain resource position according to the first indication information.

[0016] In a possible implementation, the resource information of PDSCH includes the fourth time domain resource position of the first DMRS; determining the first time domain resource position of the first DMRS includes: according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, shifting the fourth time domain resource position back M times to obtain the first time domain resource position, where M is a positive integer.

[0017] A possible implementation method, M≥1, according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position, including: when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position.

[0018] A possible implementation method, M≥1, according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position, including: when the fourth time domain resource position overlaps with the time domain resource position of CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET.

[0019] A possible implementation manner, when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or when the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position, including: when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or when the fourth time domain resource position overlaps with the time domain resource position of the CRS When the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET, the fourth time domain resource position is shifted back by 1 time to obtain the fifth time domain resource position; when one or more of the following conditions are met, the fifth time domain resource position is shifted back by M-1 times to obtain the first time domain resource position: the fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET; the fifth time domain resource position overlaps with the time domain resource position of CRS, and the fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET.

[0020] In a possible implementation, shifting back N times is to add N to the symbol index corresponding to the time domain resource position.

[0021] In a possible implementation manner, counting is performed to determine whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS.

[0022] In a second aspect, the present application provides a communication method, which can be applied to a network device, or to a device in a network device (e.g., a chip, or a chip system, or a circuit), or a device that can be used in combination with a network device, and is described below by taking the application to a network device as an example. The method may include: determining a first time domain resource position of a first DMRS and a time domain resource position of a CRS, the time domain resource position of the CRS overlapping with the first time domain resource position; shifting the first time domain resource position back N times to obtain a second time domain resource position, the second time domain resource position does not overlap with the time domain resource position of the CRS, and N is a positive integer; the first DMRS is a FL DMRS, or the first DMRS includes a FL DMRS and an additional DMRS; sending the first DMRS at the second time domain resource position.

[0023] In the application embodiment, unlike the prior art, since the time domain resource position of DMRS overlaps with the time domain resource position of CRS, the network device shifts the time domain resource position of DMRS once. If the time domain resource position of DMRS after shifting once still overlaps with the time domain resource position of CRS, it will continue to cause CRS and DMRS to interfere with each other, causing PDSCH transmission failure. In this embodiment, since the time domain resource position of DMRS overlaps with the time domain resource position of CRS, the network device will shift the time domain resource position of DMRS to a time domain resource position that does not overlap with the time domain resource position of CRS, thereby improving the transmission success rate.

[0024] It should be understood that the executor of the second aspect may be a network device, and the specific content of the second aspect corresponds to the content of the first aspect. The corresponding features of the second aspect and the beneficial effects achieved may refer to the description of the first aspect. To avoid repetition, the detailed description is appropriately omitted here.

[0025] In a possible implementation manner, the method may further include: sending first indication information and second indication information, the first indication information indicating resource information of the PDSCH of mapping type B, and the second indication information indicating the time domain resource position of the CRS.

[0026] A possible implementation method is to send the first indication information and the second indication information on the NR carrier, and the time domain resource position of the CRS is located in the overlapping area of ​​the NR carrier and the LTE carrier.

[0027] A possible implementation method, N>1, shifts the first time domain resource position back N times to obtain the second time domain resource position, including: shifting the first time domain resource position back 1 time to obtain the third time domain resource position; when the third time domain resource position overlaps with the time domain resource position of CRS, shifting the third time domain resource position back N-1 times to obtain the second time domain resource position.

[0028] In a possible implementation manner, the method may further include: sending third indication information and fourth indication information, the third indication information indicating the time-frequency resource position of the CORESET, and the fourth indication information indicating the frequency domain resource position of the first DMRS.

[0029] A possible implementation method, N=1, shifting the first time domain resource position back N times to obtain the second time domain resource position, including: when the first time domain resource position overlaps with the time domain resource position of CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET, shifting the first time domain resource position back 1 time to obtain the second time domain resource position.

[0030] A possible implementation method, N>1, shifting the first time domain resource position back N times to obtain a second time domain resource position, including: when the first time domain resource position overlaps with the time domain resource position of CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET, shifting the first time domain resource position back 1 time to obtain a third time domain resource position; when one or more of the following conditions are met, shifting the third time domain resource position back N-1 times to obtain the second time domain resource position: the third time domain resource position overlaps with the time domain resource position of CRS; the third time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET; the third time domain resource position overlaps with the time domain resource position of CRS, and the third time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET.

[0031] In a possible implementation, the resource information of the PDSCH includes the fourth time domain resource position of the first DMRS; determining the first time domain resource position of the first DMRS includes: determining the fourth time domain resource position as the first time domain resource position according to the first indication information.

[0032] In a possible implementation, the resource information of PDSCH includes the fourth time domain resource position of the first DMRS; determining the first time domain resource position of the first DMRS includes: according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, shifting the fourth time domain resource position back M times to obtain the first time domain resource position, where M is a positive integer.

[0033] A possible implementation method, M≥1, according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position, including: when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position.

[0034] A possible implementation method, M≥1, according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position, including: when the fourth time domain resource position overlaps with the time domain resource position of CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET.

[0035] A possible implementation manner, when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or when the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position, including: when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or when the fourth time domain resource position overlaps with the time domain resource position of the CRS When the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET, the fourth time domain resource position is shifted back by 1 time to obtain the fifth time domain resource position; when one or more of the following conditions are met, the fifth time domain resource position is shifted back by M-1 times to obtain the first time domain resource position: the fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET; the fifth time domain resource position overlaps with the time domain resource position of CRS, and the fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET.

[0036] In a possible implementation, shifting back N times is to add N to the symbol index corresponding to the time domain resource position.

[0037] In a possible implementation manner, counting is performed to determine whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS.

[0038] In a third aspect, the present application provides a communication method, which can be applied to a terminal device, or to a device in a terminal device (for example, a chip, or a chip system, or a circuit), or a device that can be used with a terminal device. The following description is based on the application to a terminal device as an example. The method may include:

[0039] The terminal device receives first indication information and second indication information, where the first indication information is used to indicate resource information of a PDSCH of mapping type B, and the second indication information indicates a time domain resource position of a CRS;

[0040] The terminal device determines a second time domain resource position based on the first indication information and the second indication information, where the second time domain resource position does not overlap with the time domain resource position of the CRS;

[0041] The terminal device receives the first DMRS at the second time domain resource position.

[0042] In an embodiment of the present application, scheduling or configuration constraints may be introduced to ensure that the terminal device and the network device have a consistent understanding of the movement of the time domain resource position of the DMRS due to the overlap of the time-frequency resource positions, thereby improving the transmission success rate.

[0043] In a possible implementation manner, the resource information of the PDSCH includes the fourth time domain resource position of the first DMRS; if the start symbol of the PDSCH is located at the fifth symbol of a time slot, determining the second time domain resource position based on the first indication information and the second indication information includes:

[0044] The terminal device shifts the fourth time domain resource position back N times to obtain the second time domain resource position, where N is a positive integer.

[0045] In a possible implementation manner, the resource information of the PDSCH includes the fourth time domain resource position of the first DMRS; if the starting symbol of the PDSCH is not located at the fifth symbol of a time slot, determining the second time domain resource position based on the first indication information and the second indication information includes:

[0046] The terminal device determines the fourth time domain resource position as the second time domain resource position.

[0047] In a possible implementation manner, the resource information of the PDSCH includes the fourth time domain resource position of the first DMRS; if the starting symbol of the PDSCH is not located at the fifth symbol of a time slot, the method further includes:

[0048] The terminal device determines that the DCI for scheduling the PDSCH is a false alarm DCI or an erroneous DCI; or

[0049] Or the terminal device determines that this is an error scenario (error case), and the terminal device will not process / parse the DCI, or discard (drop) the DCI, or skip (skip) the processing of the DCI.

[0050] In a possible implementation manner, the method further includes: receiving third indication information and fourth indication information, the third indication information indicating the time-frequency resource position of the control resource set CORESET, and the fourth indication information indicating the frequency domain resource position of the first DMRS.

[0051] In a possible implementation, if the start symbol of the PDSCH is located at the fifth symbol of a time slot, when the continuous symbol of the CORESET includes the second symbol of the PDSCH, the CORESET is not configured on the third symbol of the PDSCH; determining the second time domain resource position based on the first indication information and the second indication information includes:

[0052] The terminal device shifts the fourth time domain resource position back 2 times to obtain the second time domain resource position.

[0053] In a possible implementation, if the start symbol of the PDSCH is located at the fifth symbol of a time slot, when the continuous symbol of the CORESET includes the second symbol of the PDSCH, the CORESET is configured on the third symbol of the PDSCH; the method further includes:

[0054] The terminal device determines that the DCI for scheduling the PDSCH is a false alarm DCI or an erroneous DCI; or

[0055] Or the terminal device determines that this is an error scenario, and the terminal device will not process / parse the DCI, or discard the DCI, or skip the processing of the DCI.

[0056] In a possible implementation, if the start symbol of the PDSCH is located at the fifth symbol of a time slot, when the continuous symbol of the CORESET does not include the second symbol of the PDSCH, the CORESET is configured or not configured on the third symbol of the PDSCH; determining the second time domain resource position based on the first indication information and the second indication information includes:

[0057] The terminal device shifts the fourth time domain resource position back by 1 to obtain the second time domain resource position.

[0058] In a possible implementation, if the starting symbol of the PDSCH is located at the fifth symbol of a time slot, the method further includes:

[0059] The terminal device does not expect (does not expect) that the time-frequency resource position of the DMRS in symbol 6 and / or symbol 7 overlaps with the time-frequency resource position of the configured CORESET.

[0060] In a possible implementation, the terminal device does not expect that the FL DMRS is shifted to after symbol 6 and overlaps with the time-frequency resource position of the configured CORESET due to the conflict between the time-domain resource position of the first DMRS and the time-domain resource position of the CRS.

[0061] In one possible implementation, the terminal device does not expect the configured CORESET to be at symbol 6 and / or symbol 7.

[0062] In a possible implementation, a configured CORESET is a CORESET associated with a configured search space set.

[0063] In a possible implementation, the configured CORESETs are different CORESETs associated with a search space set; or multiple CORESETs associated with multiple search space sets, where one search space set is associated with one CORESET.

[0064] In a fourth aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal device, or to a device in a terminal device (for example, a chip, or a chip system, or a circuit), or a device that can be used in combination with a terminal device, and is described below by taking the application to a terminal device as an example. The method may include: receiving first indication information and second indication information, the first indication information being used to indicate resource information of a PDSCH of mapping type B, and the second indication information indicating a time domain resource position of a CRS; the resource information of the PDSCH including a fourth time domain resource position of a first DMRS; if the starting symbol of the PDSCH is not the fifth symbol in a time slot, the terminal device does not determine whether the time domain resource position of the CRS overlaps with the fourth time domain resource position of the first DMRS.

[0065] In a fifth aspect, an embodiment of the present application provides a communication device, which may be a terminal device or a device in a terminal device (e.g., a chip, or a chip system, or a circuit). The beneficial effects can be found in the description of the first aspect, which will not be repeated here. The communication device has the function of implementing the behavior in the method example of the first aspect, the third aspect, or the fourth aspect above. The function may be implemented by hardware or by executing corresponding software implementation by hardware. The hardware or software includes one or more modules corresponding to the above functions.

[0066] In a sixth aspect, an embodiment of the present application provides a communication device, which may be a network device or a device in a network device (e.g., a chip, or a chip system, or a circuit). The beneficial effects can be found in the description of the second aspect and will not be repeated here. The communication device has the function of implementing the behavior in the method example of the first aspect above. The function may be implemented by hardware or by executing corresponding software implementation by hardware. The hardware or software includes one or more modules corresponding to the above functions.

[0067] In a seventh aspect, a communication device is provided, which may be a terminal device or a device in a terminal device (e.g., a chip, or a chip system, or a circuit). The device may include a processor, a memory, an input interface, and an output interface, wherein the input interface is used to receive information from other communication devices other than the communication device, and the output interface is used to output information to other communication devices other than the communication device, and the processor calls the computer program stored in the memory to execute the communication method provided in the first aspect or any embodiment of the first aspect, the third aspect or any embodiment of the third aspect, and the fourth aspect or any embodiment of the fourth aspect.

[0068] In an eighth aspect, the present application provides a computer-readable storage medium having computer instructions stored thereon. When the computer program or computer instructions are executed, the method described in the above-mentioned first aspect and any possible implementation thereof, the third aspect and any possible implementation thereof, and the fourth aspect and any possible implementation thereof is executed.

[0069] In a ninth aspect, the present application provides a computer program product comprising executable instructions, which, when executed on a communication device, enables the method described in the above-mentioned first aspect and any possible implementation thereof, the third aspect and any possible implementation thereof, and the fourth aspect and any possible implementation thereof to be executed.

[0070] In a tenth aspect, the present application provides a communication device, which includes a processor and may also include a memory, for implementing the method in the first aspect and any possible implementation thereof, the third aspect and any possible implementation thereof, and the fourth aspect and any possible implementation thereof. The communication device may be a chip system, which may be composed of a chip or may include a chip and other discrete devices.

[0071] In the eleventh aspect, the present application provides a chip system, comprising at least one processor, a memory and an interface circuit, wherein the memory, the interface circuit and the at least one processor are interconnected through lines, and instructions are stored in the at least one memory; when the instructions are executed by the processor, any one of the communication methods described in the first to fourth aspects above is implemented.

[0072] In the twelfth aspect, the present application provides a communication system, which includes at least one terminal device and at least one access network device. When at least one of the aforementioned terminal devices and at least one of the aforementioned access network devices are operating in the communication system, it is used to execute any one of the communication methods described in the first to fourth aspects above. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 is a schematic diagram of static spectrum sharing and dynamic spectrum sharing in an embodiment of the present application;

[0074] Figure 2 This is a resource diagram of a PDSCH and DMRS in an embodiment of the present application;

[0075] Figure 3 is a schematic diagram of a time domain resource position shift according to an embodiment of the present application;

[0076] Figure 4 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application;

[0077] Figure 5is a schematic diagram of the architecture of a communication system 1000 applied in an embodiment of the present application;

[0078] Figure 6-Figure 10 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application;

[0079] Fig.11 It is a flow chart of a communication method according to an embodiment of the present application;

[0080] Fig.12 and Fig.13 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application;

[0081] Fig.14 is an interactive schematic diagram of a communication method in an embodiment of the present application;

[0082] Fig.15 is an interactive schematic diagram of another communication method of an embodiment of the present application;

[0083] Figure 16-Figure 21 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application;

[0084] Fig. 22 and Fig.23 is a schematic diagram of the structure of a possible communication device provided in an embodiment of the present application;

[0085] Fig.24 is an interactive schematic diagram of a communication method in an embodiment of the present application;

[0086] Fig.25 This is a schematic diagram of periodically transmitting the first PDSCH provided in an embodiment of the present application. DETAILED DESCRIPTION

[0087] The following is a description of the technical terms that may appear in the embodiments of the present application. The terms used in the implementation mode of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. In the various embodiments of the present application, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0088] (1) Spectrum sharing (SS)

[0089] Spectrum sharing refers to the sharing of uplink and downlink frequencies of the fifth generation mobile networks (5G) and the already deployed fourth generation mobile networks (4G). Uplink spectrum sharing is agnostic to the terminal device, such as the application of supplementary uplink (SUL). Downlink spectrum sharing can be divided into static sharing and dynamic sharing according to the resource sharing method. Static sharing can allocate resource blocks (RB) resources in a fixed proportion, and resource utilization cannot achieve optimality; dynamic sharing is dynamic sharing at the transmission time interval (TTI) level, which can maximize the use of spectrum resources.

[0090] See also Figure 1 , Figure 1 FIG. 1 is a schematic diagram of static spectrum sharing and dynamic spectrum sharing in an embodiment of the present application. Figure 1 As shown in the figure, the dynamic sharing of time-frequency resources by LTE and NR on the same spectrum according to business volume requirements is called dynamic spectrum sharing (DSS). DSS can flexibly allocate spectrum resources in real time and dynamically according to the business needs of the two standards. When 5G has no user services, 4G users can use all dynamically shared spectrum resources (excluding necessary 5G system overhead), which greatly improves spectrum utilization and makes network evolution smoother. Therefore, DSS has a great improvement in user experience compared to static bandwidth allocation. Compared with static spectrum refarming, DSS further demonstrates its high spectrum utilization efficiency and helps the smooth evolution of the network.

[0091] (2) PDSCH DMRS

[0092] Currently, PDSCH has two resource mapping types: mapping Type A and mapping Type B. The mapping type of PDSCH can be determined by the indication contained in the scheduled DCI. DMRS is mainly used for channel estimation during PDSCH demodulation. The FLDMRS of type B PDSCH is located at the first OFDM symbol of this PDSCH, that is, the position of the first DMRS symbol. 0 = 0. The position of the additional DMRS with a PDSCH duration length of 10 can refer to the following table.

[0093]

[0094] Among them, ld Indicates the duration of PDSCH (in units of OFDM symbols). Indicates the time domain position of DMRS. Parameters pos0, pos1, pos2, and pos3 indicate different configurations, that is, whether there is an additional DMRS, and the corresponding DMRS position is also different. For example, pos0 indicates no additional DMRS, only FL DMRS, and pos2 indicates that there is an additional DMRS, and all DMRS positions are located at the first symbol of PDSCH. The 4th symbol and the 7th symbol

[0095] For example, see Figure 2 , Figure 2 FIG. 1 is a schematic diagram of PDSCH and DMRS resources in an embodiment of the present application. Figure 2 As shown, one DCI schedules one PDSCH, and the indication information contained in the DCI indicates that the time domain position of the PDSCH starts from the 5th symbol (symbol 4) of a time slot, and the duration length of the PDSCH is 10. Assuming that the RRC parameter dmrs-AdditionalPosition=pos2 sent by the network device to the terminal device, the terminal device can determine the time domain position of the PDSCH and DMRS according to the indication information of the DCI and the RRC parameter, that is, the time domain position of the DMRS is symbol 4, symbol 8 and symbol 11.

[0096] (3) DMRS and CORESET collision solution

[0097] The current DMRS shift rules for Type B PDSCH DMRS that have resource element (RE) level collision with CORESET are:

[0098] For PDSCH mapping type B, if the duration of the PDSCH with a normal cyclic prefix (NCP) is l d={2,3,4,5,6,7,8,9,10,11,12,13} OFDM symbols, when the FL DMRS of PDSCH collides with the reserved resource of CORESET associated with one search space set (SS set), all DMRS symbols of PDSCH are shifted backward (that is, the DMRS position increases), so that the first DMRS symbol is moved after CORESET (no longer collides with the colliding CORESET), until it does not collide with any CORESET. The collision can be understood as at least one RE of DMRS overlapping with at least one RE of CORESET, that is, the time-frequency resource position at the RE level overlaps, which will cause mutual interference between PDSCH DMRS and CORESET on the overlapping resources, affecting the demodulation performance and reducing the probability of successful PDSCH reception. DMRS shifting can avoid collision, eliminate interference caused by the collision between CORESET and DMRS, improve channel estimation performance, and thus improve the probability of successful PDSCH reception.

[0099] The collision between DMRS and CORESET causes the DMRS symbol to move, but it cannot move all the time and needs to meet some predefined constraints. The following are some related constraints:

[0100] 1. If the PDSCH duration is l d ={5,6,7,8,9,10,11,12,13} OFDM symbols, the terminal device does not expect to receive DMRS on symbols after the 4th symbol. The 4th symbol here is calculated from the first symbol scheduled by PDSCH, not from the first symbol of the slot.

[0101] 2. For all PDSCH duration lengths except PDSCH duration lengths 2, 5, and 7, the terminal device does not expect d -1) symbol later. That is, DMRS can be moved to the penultimate symbol of PDSCH but cannot be moved any further, i.e., cannot be moved to the last symbol of PDSCH duration. It can also be understood that the base station cannot configure a scenario where DMRS is moved to the last OFDM symbol of PDSCH duration due to CORESET collision.

[0102] For example, see Figure 3 , Figure 3 FIG. 1 is a schematic diagram of a time domain resource position shift according to an embodiment of the present application. Figure 3As shown, the terminal device receives a DCI scheduling a PDSCH symbol length of 7 OFDM symbols, starting from the second symbol of a time slot (symbol index 1, symbolindex 1, also called symbol 1) and continuing to the eighth symbol of this time slot (symbol 7). According to the configuration, this PDSCH contains FL DMRS and additional DMRS, which are located at the first symbol (symbol 1) and the fifth symbol (symbol 5) of the PDSCH respectively. The continuous symbols of a configured CORESET are 2 OFDM symbols, which are located at the first symbol and the second symbol of this time slot. Since the FL DMRS of the PDSCH collides with the CORESET, the positions of all DMRS symbols increase until the first DMRS is after this CORESET, then only one move is required. The FL DMRS moves to symbol 2 and does not exceed the fourth symbol. The additional DMRS moves to symbol 6 and does not exceed the sixth symbol, thus satisfying the predefined constraints.

[0103] (4) DMRS and LTE CRS collision solution

[0104] In LTE and NR DSS scenarios, the current DMRS movement rule for Type B PDSCH DMRS and LTE CRS symbol-level collision is: DMRS and CRS must be shifted if they collide at the symbol level, because LTE CRS is in each RB. If PDSCH DM-RS collides with LTE CRS at the symbol level, there will also be RE-level DMRS collision and PDSCH data will also collide with CRS resources, causing interference and affecting the correct reception of data. It should be noted that this collision resolution mechanism exists in the scenario where the PDSCH duration length is 10. Among them, CRS can also be called a common reference signal.

[0105] Specifically, the network device configures the LTE CRS pattern, i.e., the time-frequency domain resource location of the CRS, to the terminal device through high-level parameters (e.g., RRC parameters) lte-CRS-ToMatchAround, lte-CRS-PatternList1, or lte-CRS-PatternList2. The subcarrier spacing is 15kHz (subcarrier spacing configuration μ=0), and the PDSCH duration is l d=10, DMRS is configured as a single OFDM symbol, and at least one PDSCH DMRS symbol collides with the symbol where the CRSRE configured by the above RRC parameters is located, then all DMRS positions in all time slots where this PDSCH is located are increased by 1. The reason why all time slots where this PDSCH is located should be considered is that this PDSCH can be a repeated transmission at the time slot level, so this PDSCH appears on the same OFDM symbol in multiple time slots. Compared with the CORESET collision, the DM-RS and CRS collision judgment is only performed once.

[0106] For example, see Figure 4 , Figure 4 FIG. 1 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application. Figure 4 As shown, the terminal device receives a DCI scheduling a PDSCH duration of l d =10, the starting symbol starts from the 5th symbol (symbol 4) of a time slot and continues to the 14th symbol (symbol 13) of this time slot. The network device configures the terminal device through the RRC parameters mentioned above. This cell has an LTE CRS with an antenna port (antennaport) of 4, which appears in symbols 0, 1, 4, 7, 8 and 11 of each time slot (the distribution in the frequency domain will not be described in detail, because it will move due to symbol-level collision). The DMRS symbol of the scheduled 1 PDSCH collides with the LTE CRS symbol on the 1st symbol (symbol 4) and the 8th symbol (symbol 11) of the PDSCH, so all DMRS of the PDSCH are moved back one symbol. That is, the first DMRS moves to symbol 5, and the second DMRS moves to symbol 12.

[0107] Figure 5 FIG. 1 is a schematic diagram of the architecture of a communication system 1000 used in an embodiment of the present application. Figure 5 As shown, the communication system includes a radio access network 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The radio access network (RAN) 100 may include at least one RAN node (eg, Figure 5 110a and 110b in the figure, collectively referred to as 110), and may also include at least one terminal (such as Figure 5120a-120j in the figure). The terminal is connected to the wireless access network device by wireless means, and the wireless access network device is connected to the core network by wireless or wired means. The core network device and the wireless access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the wireless access network device can be integrated on the same physical device, or part of the functions of the core network device and part of the functions of the wireless access network device can be integrated on one physical device. Terminals and wireless access network devices can be connected to each other by wired or wireless means. Figure 5 This is just a schematic diagram. The communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices. Figure 5 Not drawn in.

[0108] RAN 100 may be a 3GPP-related cellular system, such as a 4G or 5G mobile communication system, or a future-oriented evolution system (such as a 6G mobile communication system). RAN 100 may also be an open access network (open RAN, O-RAN or ORAN), a cloud radio access network (cloud radio access network, CRAN), or a wireless fidelity (wireless fidelity, WiFi) system. RAN 100 may also be a communication system that integrates two or more of the above systems.

[0109] The RAN node 110, which may also be sometimes referred to as an access network device, a RAN entity or an access node, constitutes a part of the communication system to help the terminal achieve wireless access. The multiple RAN nodes 110 in the communication system 1000 may be nodes of the same type or nodes of different types. In some scenarios, the roles of the RAN node 110 and the terminal 120 are relative, for example, Figure 5 The network element 120i may be a helicopter or a drone, which may be configured as a mobile base station. For the terminals 120j that access the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal. The RAN node 110 and the terminal 120 are sometimes referred to as communication devices, for example Figure 5 The network elements 110a and 110b may be understood as communication devices having base station functions, and the network elements 120a-120j may be understood as communication devices having terminal functions.

[0110] In one possible scenario, a RAN node may be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a sixth generation (6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system. A RAN node may be a macro base station (e.g. Figure 5 110a in), micro base stations or indoor stations (such as Figure 5 110b in the description), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the RAN node may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the vehicle to everything (V2X) technology may be a road side unit (RSU). All or part of the functions of the RAN node in the present application may also be implemented by software functions running on hardware, or by virtualization functions instantiated on a platform (such as a cloud platform). The RAN node in the present application may also be a logical node, a logical module or software that can implement all or part of the functions of the RAN node.

[0111] In another possible scenario, multiple RAN nodes collaborate to assist the terminal in achieving wireless access, and different RAN nodes respectively implement part of the functions of the base station. For example, the RAN node can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be set separately, or can also be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU) or a remote radio head (RRH).

[0112] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. For the convenience of description, CU, CU-CP, CU-UP, DU and RU are described as examples in this application. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application may be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0113] A terminal is a device with wireless transceiver function, which can send signals to a base station or receive signals from a base station. A terminal can also be called a terminal device, user equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely used in various scenarios, for example, device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things (IOT), virtual reality, augmented reality, industrial control, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. The embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal.

[0114] Base stations and terminals can be fixed or movable. Base stations and terminals can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons, and artificial satellites. The embodiments of this application do not limit the application scenarios of base stations and terminals.

[0115] The roles of the base station and the terminal can be relative, for example, Figure 5The helicopter or drone 120i in the figure can be configured as a mobile base station. For the terminal 120j that accesses the wireless access network 100 through 120i, the terminal 120i is a base station; but for the base station 110a, 120i is a terminal, that is, 110a and 120i communicate through the wireless air interface protocol. Of course, 110a and 120i can also communicate through the interface protocol between base stations. In this case, relative to 110a, 120i is also a base station. Therefore, base stations and terminals can be collectively referred to as communication devices. Figure 5 110a and 110b in the figure may be referred to as communication devices having base station functions. Figure 5 120a-120j in the figure can be called communication devices with terminal functions.

[0116] Base stations and terminals, base stations and base stations, and terminals and terminals can communicate through authorized spectrum, unauthorized spectrum, or both; they can communicate through spectrum below 6 gigahertz (GHz), spectrum above 6 GHz, or spectrum below 6 GHz and spectrum above 6 GHz. The embodiments of the present application do not limit the spectrum resources used for wireless communication.

[0117] In the embodiments of the present application, the functions of the base station may also be performed by a module (such as a chip) in the base station, or by a control subsystem including the base station function. The control subsystem including the base station function here may be a control center in the above-mentioned application scenarios such as smart grid, industrial control, smart transportation, and smart city. The functions of the terminal may also be performed by a module (such as a chip or a modem) in the terminal, or by a device including the terminal function.

[0118] In this application, the base station sends a downlink signal or downlink information to the terminal, and the downlink information is carried on the downlink channel; the terminal sends an uplink signal or uplink information to the base station, and the uplink information is carried on the uplink channel. In order to communicate with the base station, the terminal needs to establish a wireless connection with the cell controlled by the base station. The cell with which the terminal has established a wireless connection is called the service cell of the terminal. When the terminal communicates with the service cell, it will also be interfered by signals from neighboring cells.

[0119] In the embodiments of the present application, the time domain symbol may be an orthogonal frequency division multiplexing (OFDM) symbol or a discrete Fourier transform spread OFDM (DFT-s-OFDM) symbol. Unless otherwise specified, the symbols in the embodiments of the present application refer to time domain symbols.

[0120] It can be understood that in the embodiments of the present application, PDSCH is only used as an example of a downlink data channel. In different systems and different scenarios, data channels and control channels may have different names, and the embodiments of the present application do not limit this.

[0121] In order to facilitate the understanding of the embodiments of the present application, the technical problems to be specifically solved by the present application are further analyzed and proposed.

[0122] The current DMRS movement rule for symbol-level collision between Type B PDSCH DMRS and LTE CRS is that the DM-RS and CRS collision judgment is only performed once. That is, when a terminal device receives a DCI scheduling a PDSCH, and at least one PDSCH DMRS symbol collides with the symbol where the CRSRE is located configured by the RRC parameters, then all DMRS positions contained in all time slots where this PDSCH is located increase by 1.

[0123] See also Figure 6 , Figure 6 FIG. 1 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application. Figure 6 As shown, the DMRS symbol of the scheduled PDSCH collides with the LTE CRS symbol at the first symbol (symbol 0) and the eighth symbol (symbol 7) of the PDSCH. Therefore, all DMRSs of the PDSCH are moved back by one symbol, that is, the first DMRS is moved to symbol 1, and the second DMRS is moved to symbol 8. However, the DMRS after the symbol is moved still collides with the LTE CRS symbol, causing interference and affecting the correct reception of data.

[0124] Secondly, when PDSCH DMRS collides with CORESET and LTE CRS at the same time, different execution orders of whether the terminal device first determines CRS collision or CORESET collision will lead to different execution results.

[0125] like Figure 7As shown in FIG. 1 , when DM-RS collides with CORESET and CRS at the same time, if it is first determined whether it collides with CRS (collision exists), and then it is determined whether it collides with CORESET (no collision exists), DMRS moves to symbol 1. Figure 8 As shown, when DM-RS collides with CORESET and CRS at the same time, if it is first determined whether it collides with CORESET (collision exists), and then it is determined whether it collides with CRS (no collision exists), the DMRS moves to symbol 2.

[0126] In the above scenario, depending on the execution order, the PDSCH DMRS may move to different positions, causing the network device and the terminal device to have different understandings of the position of the PDSCH DMRS after the DMRS moves due to the collision, resulting in the terminal device failing to receive the PDSCH.

[0127] When PDSCH DMRS collides with CORESET and LTE CRS at the same time, the CRS collision judgment count result will affect the false alarm judgment of the terminal device. False alarm judgment can be understood as if the received DCI scheduling PDSCH does not meet the standard constraints, the terminal device will think that the network device did not send this DCI, this DCI is an erroneous DCI, and will not process or skip (skip) or ignore (ignore) or discard (drop) this DCI.

[0128] When DMRS collides with CORESET, as long as the colliding symbol collides with the CRS symbol, the CRS collision judgment is counted as one. After DMRS moves, CRS collision is no longer judged. In other words, even if DMRS collides with CRS, DMRS will no longer move. Fig. 9 As shown in the figure (When DM-RS collides with CORESET and CRS at the same time, CRS collision is determined first), the collision judgment result is: DMRS moves to the 4th OFDM symbol of PDSCH, which meets the protocol requirements. The terminal device will process the DCI that schedules PDSCH and receive this PDSCH.

[0129] When DMRS collides with CORESET, as long as the colliding symbol collides with the CRS symbol, the CRS collision judgment is not counted as one. After DMRS moves, CRS collision is still judged. Once DMRS collides with CRS, DMRS moves to avoid CRS. Fig.10 As shown in the figure (When DM-RS collides with CORESET and CRS at the same time, CRS collision is determined first), the collision judgment result is: DMRS moves to the 6th OFDM symbol, which does not meet the protocol requirements. The terminal device will determine that this scheduling is an incorrect scheduling and discard the DCI of the scheduled PDSCH.

[0130] Therefore, different CRS collision judgment counts will cause different false alarm judgment results for scheduling scenarios by terminal devices (the same scheduling scenario is understood as reasonable scheduling according to the former, and as incorrect scheduling that does not comply with protocol regulations according to the latter). This may lead to inconsistent understanding with network devices, resulting in transmission failure.

[0131] Therefore, the technical problems to be solved by the present application may include: 1. How to improve the data reception accuracy when DMRS collides with CRS; 2. In the NR and LTE DSS scenarios, when PDSCH DMRS collides with CORESET and LTE CRS, the problem that the positions of PDSCH DMRS movement may be different due to different execution orders, resulting in inconsistent understanding of DMRS movement caused by resource collision between terminal equipment and network equipment can be solved, thereby improving the transmission success rate; 3. In the NR and LTE DSS scenarios, when PDSCH DMRS collides with CORESET and LTE CRS, the problem that the false alarm judgment results of the terminal equipment for the scheduling scenario are different due to different CRS collision judgment counts, resulting in inconsistent understanding of DMRS movement caused by resource collision between terminal equipment and network equipment can be solved, thereby improving the transmission success rate.

[0132] The present application proposes a communication method, which will be described below through the following embodiments. In the various embodiments of the present application, if there is no special explanation and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment according to their inherent logical relationship.

[0133] The present application embodiment (as described below) Figure 11-Figure 21 In the corresponding embodiment), the terminal device and the network device can be used as the execution subject of the interactive illustration as an example to illustrate the method. The present application does not limit the execution subject of the interactive illustration. For example, the terminal device can also be a chip, a chip system, or a processor that supports the terminal device to implement the method, or a logic module or software that can implement all or part of the terminal device functions; the network device can also be a chip, a chip system, or a processor that supports the network device to implement the method, or a logic module or software that can implement all or part of the network device functions. The embodiments of the present application are uniformly explained here and will not be repeated later.

[0134] It should be noted that the time domain resource position in the embodiment of the present application can be a symbol position. Shifting the time domain resource position of DMRS backward N times can be understood as adding N to the symbol index corresponding to the time domain resource position of DMRS. For example, shifting the first time domain resource position backward 1 time can be understood as adding 1 to the symbol index corresponding to the first time domain resource position of DMRS. Secondly, shifting the time domain resource position of DMRS backward can be understood as shifting the time domain resource positions of all DMRS contained in all time slots where PDSCH is located backward. The reason for considering all time slots where this PDSCH is located is because this PDSCH can be a repeated transmission at the time slot level, so this PDSCH appears on the same OFDM symbol in multiple time slots.

[0135] In the examples in the embodiments of the present application, one time slot and a PDSCH length of 10 are used for exemplary description. The embodiments of the present application do not limit the number of time slots and the length of PDSCH. In addition, the embodiments of the present application do not limit the starting symbol of PDSCH. For example, the starting symbol of PDSCH can be symbol 0 of a time slot, or symbol 2, symbol 3 or symbol 4 of a time slot.

[0136] The following describes a communication method provided in an embodiment of the present application. Fig.11 , Fig.11 is a flow chart of a communication method according to an embodiment of the present application. Fig.11 As shown, the communication method includes but is not limited to the following steps:

[0137] S1101. The terminal device determines a first time domain resource position of a first DMRS and a time domain resource position of a CRS, and the time domain resource position of the CRS overlaps with the first time domain resource position.

[0138] The network device may send first indication information to the terminal device to indicate resource information of the PDSCH. For example, the network device may send indication information indicating resource information of the PDSCH to the terminal device through DCI, and the indication information may be a time domain resource assignment (TDRA) domain and a frequency domain resource assignment (FDRA) domain. The FDRA domain indicates that the PDSCH may be a Type B PDSCH. The TDRA domain indicates that the time domain resource location information of the PDSCH may include information such as duration length, time domain starting position, etc. For example, the duration length is 10, and the time domain starting position is the first symbol of a time slot (symbol 0) or the fifth symbol of a time slot (symbol 4).

[0139] The terminal device can determine the first time domain resource position of the first DMRS and the time domain resource position of the CRS, and the time domain resource position of the CRS overlaps with the first time domain resource position. Among them, resource overlap can be understood as resource conflict / collision (collision), for example, the overlap of the time domain resource position of the first DMRS and the time domain resource position of the CRS can be understood as the time domain resource position used for sending and receiving the first DMRS is the same as the time domain resource position used for sending and receiving the CRS, for example, in the same OFDM symbol, causing interference to the sending and receiving of the first DMRS and the CRS. In the embodiment of the present application, the collision of the first DMRS and the CRS can be equivalently understood as the overlap of the time domain resource position of the first DMRS and the time domain resource position of the CRS. The collision of the first DMRS and the CORESET can be equivalently understood as the overlap of the time-frequency resource position of the first DMRS (the time domain resource position of the first DMRS and the fourth indication information indicating the frequency domain resource position of the first DMRS) and the time-frequency resource position of the CORESET, which can be replaced with each other, and a unified explanation is given here.

[0140] The terminal device may determine the first time domain resource position of the first DMRS as follows:

[0141] In the first possible implementation, the first time domain resource position is the initial time domain resource position, which can be understood as the time domain resource position that is configured by the network device and has not been changed. Specifically: the network device sends a second indication information to the terminal device indicating the time domain resource position of the CRS, and the resource information of the PDSCH includes the fourth time domain resource position of the first DMRS. The terminal device can determine the first time domain resource position based on the time domain resource position of the CRS and the fourth time domain resource position. For example, the first indication information in the DCI passed by the network device can be a TDRA indication field, which indicates the PDSCH time domain length l d , mapping type B and other resource information. The terminal device uses the resource information indicated by the TDRA domain, the network device through high-level parameters (such as RRC parameters dmrs-AdditionalPosition and other parameters) and the protocol predefined rules (such as mapping type B PDSCH DM-RS first column DM-RS time domain position l 0 =0 and other information) together to determine the time domain resource position of DM-RS This time domain resource position does not undergo any collision / conflict judgment to cause the time domain position to move, that is, the fourth time domain resource position of the first DM-RS. Specifically, the fourth time domain resource position of the first DMRS is determined according to the resource information of the PDSCH, and the description of the PDSCH DMRS in the above technical terms can be referred to, which will not be repeated here.

[0142] In a second possible implementation, the first time domain resource position is a non-initial time domain resource position. The non-initial time domain resource position can be understood as a time domain resource position that is configured by the network device and has been changed. Specifically: the network device sends a second indication message to the terminal device indicating the time domain resource position of CRS, sends a third indication message to indicate the time-frequency resource position of CORESET, sends a fourth indication message to indicate the frequency domain resource position of the first DMRS, and the resource information of PDSCH includes the fourth time domain resource position of the first DMRS. The terminal device can determine the first time domain resource position according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position of the first DMRS, and the frequency domain resource position of the first DMRS.

[0143] A possible implementation method for a terminal device to determine the time domain resource position of a CRS is as follows: the terminal device receives second indication information from a network device indicating the time domain resource position of the CRS, so that the time domain resource position of the CRS can be determined according to the second indication information. It can be understood that the second indication information can indicate not only the time domain resource position of the CRS, but also the frequency domain resource position of the CRS. For example, the second indication information can be a high-level parameter (such as an RRC parameter), such as configuring a CRS pattern for the terminal device through lte-CRS-ToMatchAround, lte-CRS-PatternList1, or lte-CRS-PatternList2, that is, the time-frequency resource position of the CRS. The terminal device can also determine the time domain resource position of the CRS according to the second indication information.

[0144] S1102. The terminal device shifts the first time domain resource position backward N times to obtain a second time domain resource position, and the second time domain resource position does not overlap with the time domain resource position of the CRS.

[0145] After the terminal device determines the first time domain resource position of the first DMRS and the time domain resource position of the CRS, the terminal device may shift the first time domain resource position back N times to obtain a second time domain resource position, wherein the second time domain resource position does not overlap with the time domain resource position of the CRS. It can be understood that since the time domain resource position of the CRS overlaps with the first time domain resource position, the first time domain resource position may be shifted back to a second time domain resource position that does not overlap with the time domain resource position of the CRS.

[0146] It can be understood that the time domain resource position in this embodiment can be a symbol position. Shifting the time domain resource position back N times can be understood as adding N to the symbol index corresponding to the time domain resource position. For example, shifting the first time domain resource position back 1 time can be understood as adding 1 to the symbol index corresponding to the first time domain resource position.

[0147] The first DMRS is a FLDMRS, which may also be called a first DMRS; or, the first DMRS includes a FL DMRS and an additional DMRS, and N is a positive integer.

[0148] The implementation method of the terminal device shifting the first time domain resource position N times to obtain the second time domain resource position may be as follows:

[0149] In a first possible implementation, N is 1, that is, the terminal device moves the first time domain resource position backward by 1 to obtain the second time domain resource position. For example, the first DMRS is FL DMRS, see Fig.12 , Fig.12 FIG. 1 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application. Fig.12 As shown, the time domain resource position of CRS includes symbol 0, symbol 4, symbol 7 and symbol 11, the first time domain resource position of the first DMRS is symbol 4, and the first time domain resource position of the first DMRS overlaps with the time domain resource position of CRS. The terminal device shifts the first time domain resource position back by 1 time to obtain the second time domain resource position as symbol 5. It can be seen that the second time domain resource position does not overlap with the time domain resource position of CRS.

[0150] In a second possible implementation, N is greater than 1. The terminal device shifts the first time domain resource position backward by 1 to obtain a third time domain resource position; when the third time domain resource position overlaps with the time domain resource position of the CRS, the terminal device shifts the third time domain resource position backward by N-1 times to obtain a second time domain resource position. Exemplarily, the first DMRS is an FL DMRS, and N is greater than 1. Fig.13 , Fig.13 FIG. 1 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application. Fig.13 As shown, the time domain resource positions of CRS are symbol 0, symbol 1, symbol 4, symbol 7, symbol 8 and symbol 11, the first time domain resource position of the first DMRS is symbol 0, and the first time domain resource position of the first DMRS overlaps with the time domain resource position of CRS. The terminal device shifts the first time domain resource position back by 1 time to obtain a third time domain resource position as symbol 1, and the third time domain resource position still overlaps with the time domain resource position of CRS. The third time domain resource position is further shifted back by 1 time to obtain a second time domain resource position as symbol 2. It can be seen that the second time domain resource position does not overlap with the time domain resource position of CRS.

[0151] S1103: The network device sends a first DMRS at a second time domain resource location. Correspondingly, the terminal device receives the first DMRS at the second time domain resource location.

[0152] It is understandable that the network device may also determine the second time domain resource position of the first DMRS. The specific determination method may refer to the relevant description of the terminal device determining the second time domain resource position in S1101 and S1102 above, which will not be repeated here.

[0153] After the network device and the terminal device determine the second time domain resource position, the transmission of the first DMRS can be realized at the second time domain resource position, that is, the network device sends the first DMRS at the second time domain resource position, and the terminal device receives the first DMRS at the second time domain resource position. The terminal device receives the first DMRS for channel estimation during PDSCH demodulation.

[0154] The network device and the terminal device may transmit the above-mentioned first indication information and second indication information on the NR carrier, for example, the network device sends the first indication information and the second indication information on the NR carrier, and the terminal device receives the first indication information and the second indication information on the NR carrier. Among them, this embodiment does not limit the transmission order of the first indication information and the second indication information, for example, the first indication information may be transmitted first and then the second indication information, or the second indication information may be transmitted first and then the first indication information, or the first indication information and the second indication information may be transmitted at the same time.

[0155] Different from the prior art, since the time domain resource position of DMRS overlaps with the time domain resource position of CRS, the terminal device shifts the time domain resource position of DMRS once. If the time domain resource position of DMRS after shifting once still overlaps with the time domain resource position of CRS, it will continue to cause CRS and DMRS to interfere with each other, and the channel estimation of the terminal device is inaccurate, resulting in PDSCH transmission failure. In this embodiment, since the time domain resource position of DMRS overlaps with the time domain resource position of CRS, the terminal device will shift the time domain resource position of DMRS to a time domain resource position that does not overlap with the time domain resource position of CRS, thereby improving the transmission success rate.

[0156] for Fig.11 The method embodiment shown in the figure, some specific implementation methods and beneficial effects can be referred to in the following Figure 14-Figure 21 description, that is, Figure 14-Figure 21 The embodiment shown is Fig.11 The specific implementation of the embodiment shown is not shown in the following for the sake of redundancy. Fig.11 The embodiments are described in detail. Fig.14 The method embodiment may correspond to the first possible implementation manner in which the terminal device determines the first time domain resource position of the first DMRS in the above step S1101; Fig.15 The method embodiment may correspond to the second possible implementation manner in which the terminal device determines the first time domain resource position of the first DMRS in the above step S1102.

[0157] The following describes a communication method provided in an embodiment of the present application. Fig.14 , Fig.14 Schematic diagram of an interaction of a communication method in an embodiment of the present application. Fig.14 As shown, the communication method may include at least the following steps: S1405 and S1406 are optional steps.

[0158] S1401. The network device sends second indication information indicating the time domain resource position of the CRS to the terminal device. Correspondingly, the terminal device receives the second indication information from the network device.

[0159] The network device may send a second indication information to the terminal device to indicate the time domain resource position of the CRS. It can be understood that the second indication information may indicate not only the time domain resource position of the CRS, but also the frequency domain resource position of the CRS. For example, the second indication information may be a high-level parameter (such as an RRC parameter), such as configuring the pattern of the CRS for the terminal device through lte-CRS-ToMatchAround, lte-CRS-PatternList1, or lte-CRS-PatternList2, that is, the time-frequency resource position of the CRS. The terminal device may also determine the time domain resource position of the CRS according to the second indication information.

[0160] S1402. The terminal device determines the time domain resource location of the CRS according to the second indication information.

[0161] After the terminal device receives the second indication information from the network device, it can determine the time domain resource position of the CRS according to the second indication information.

[0162] S1403: The network device sends first indication information indicating resource information of a PDSCH to the terminal device, where the resource information of the PDSCH includes a fourth time domain resource position of a first DMRS. Accordingly, the terminal device receives the first indication information from the network device.

[0163] The network device may send a first indication information to the terminal device to indicate resource information of the PDSCH, wherein the resource information of the PDSCH includes the fourth time domain resource position of the first DMRS. The fourth time domain resource position may be understood as the initial time domain resource position of the first DMRS. For a specific description, reference may be made to the description of the fourth time domain resource position in the above step S1101, which will not be repeated here.

[0164] S1404. The terminal device determines the first time domain resource position of the first DMRS according to the time domain resource position of the CRS and the fourth time domain resource position.

[0165] After the terminal device receives the first indication information from the network device, the fourth time domain resource position can be determined according to the first indication information. The first time domain resource position of the first DMRS is determined according to the time domain resource position of the CRS and the fourth time domain resource position, specifically: if the time domain resource position of the CRS overlaps with the fourth time domain resource position, the fourth time domain resource position can be determined as the first time domain resource position, and S1405 and S1406 are continued.

[0166] If the time domain resource position of the CRS does not overlap with the fourth time domain resource position, the network device and the terminal device may transmit the first DMRS at the fourth time domain resource position and end the process.

[0167] S1405. The terminal device shifts the first time domain resource position backward N times to obtain a second time domain resource position, and the second time domain resource position does not overlap with the time domain resource position of the CRS.

[0168] It can be understood that S1405 corresponds to S1102, and the relevant description in S1405 can refer to the above description of S1102, which will not be repeated here.

[0169] S1406: The network device sends a first DMRS at a second time domain resource location. Correspondingly, the terminal device receives the first DMRS at the second time domain resource location.

[0170] It can be understood that S1406 corresponds to S1103, and the relevant description in S1406 can refer to the above description of S1103, which will not be repeated here.

[0171] In this embodiment, the terminal device can determine the first time domain resource position of the first DMRS based on the initial time domain resource position of the first DMRS and the time domain resource position of the CRS. Since the first time domain resource position overlaps with the time domain resource position of the CRS, the terminal device will shift the first time domain resource position to a time domain resource position that does not overlap with the time domain resource position of the CRS, thereby improving the transmission success rate.

[0172] The following describes a communication method provided in an embodiment of the present application. Fig.15 , Fig.15 FIG. 1 is an interactive schematic diagram of another communication method of an embodiment of the present application. Fig.15 As shown, the communication method may include at least the following steps.

[0173] S1501. The network device sends second indication information indicating the time domain resource position of the CRS to the terminal device. Correspondingly, the terminal device receives the second indication information from the network device.

[0174] S1502. The terminal device determines the time domain resource location of the CRS according to the second indication information.

[0175] It can be understood that S1501-S1502 corresponds to S1401-S1402, and the relevant description in S1501-S1502 can refer to the above description of S1401-S1402, which will not be repeated here.

[0176] S1503. The network device sends third indication information indicating the time-frequency resource position of CORESET and fourth indication information indicating the frequency domain resource position of the first DMRS to the terminal device. Correspondingly, the terminal device receives the third indication information and the fourth indication information from the network device.

[0177] S1504. The network device sends first indication information indicating resource information of the PDSCH to the terminal device, and the resource information of the PDSCH includes the fourth time domain resource position of the first DMRS. Accordingly, the terminal device receives the first indication information from the network device. Optionally, the fourth indication information indicating the frequency domain resource position of the first DMRS may also be included in the resource information of the PDSCH.

[0178] S1505. The terminal device determines the first time domain resource position of the first DMRS based on at least one of the time domain resource position of the CRS, the time-frequency resource position of the CORESET, the fourth time domain resource position, and the frequency domain resource position of the first DMRS, and the time domain resource position of the CRS overlaps with the first time domain resource position.

[0179] The terminal device may shift the fourth time domain resource position backward M times to obtain the first time domain resource position according to at least one of the time domain resource position of the CRS, the time-frequency resource position of the CORESET, the fourth time domain resource position, and the frequency domain resource position of the first DMRS, where M is an integer greater than or equal to 0. The specific implementation method may be as follows:

[0180] In a first possible implementation, the terminal device determines the first time domain resource position based on the time-frequency resource position of the CORESET, the fourth time domain resource position, and the frequency domain resource position of the first DMRS. Specifically: when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position.

[0181] M=1, illustratively, the first DMRS is FL DMRS, see Fig.16 , Fig.16 FIG. 1 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application. Fig.16As shown, the time domain resource position of CRS includes symbol 0, symbol 4, symbol 7 and symbol 11, the time domain resource position of CORESET#1 includes symbol 2, symbol 3 and symbol 4 (the frequency domain resource position of CORESET#1 is not shown in the figure), the fourth time domain resource position of the first DMRS is symbol 3, and the fourth time domain resource position overlaps with the time domain resource position of CORESET#1. The terminal device shifts the fourth time domain resource position back by 1 time to obtain the first time domain resource position as symbol 4. It can be seen that the first time domain resource position overlaps with the time domain resource position of CRS.

[0182] M>1, when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, when one or more of the following conditions are met, the fifth time domain resource position is shifted back M-1 times to obtain the first time domain resource position:

[0183] The fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET;

[0184] The fifth time domain resource position overlaps with the time domain resource position of the CRS, and the fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET.

[0185] Exemplarily, the first DMRS is a FL DMRS, see Fig.17 , Fig.17 FIG. 1 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application. Fig.17 As shown, the time domain resource position of CRS includes symbol 0, symbol 4, symbol 7 and symbol 11, the time domain resource position of CORESET#1 includes symbol 2 and symbol 3 (the frequency domain resource position of CORESET#1 is not shown in the figure), the fourth time domain resource position of the first DMRS is symbol 2, and the fourth time domain resource position overlaps with the time domain resource position of CORESET#1, then the terminal device shifts the fourth time domain resource position back by 1 time to obtain the fifth time domain resource position as symbol 3, and the fifth time domain resource position overlaps with the time domain resource position of CORESET#1, and continues to shift the fifth time domain resource position back by 1 time to obtain the first time domain resource position as symbol 4. It can be seen that symbol 4 of the first time domain resource position overlaps with the time domain resource position of CRS.

[0186] In a second possible implementation, the terminal device determines the first time domain resource position based on the time domain resource position of the CRS, the time-frequency resource position of the CORESET, the fourth time domain resource position, and the frequency domain resource position of the first DMRS. Specifically: when the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of the CORESET, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position.

[0187] M=0, illustratively, the first DMRS is FL DMRS, see Fig.18 , Fig.18 FIG. 1 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application. Fig.18 As shown, the time domain resource position of CRS includes symbol 0, symbol 1, symbol 4, symbol 7, symbol 8 and symbol 11, the time domain resource position of CORESET#1 includes symbol 0, symbol 1 and symbol 2 (the frequency domain resource position of CORESET#1 is not shown in the figure), the fourth time domain resource position of the first DMRS is symbol 0, and the fourth time domain resource position overlaps with the time domain resource positions of CORESET#1 and CRS, then the terminal device determines the first time domain resource position as the fourth time domain resource position. It can be seen that the first time domain resource position overlaps with the time domain resource position of CRS.

[0188] S1506. The terminal device shifts the first time domain resource position backward N times to obtain a second time domain resource position, and the second time domain resource position does not overlap with the time domain resource position of the CRS.

[0189] The terminal device moves the first time domain resource position backward N times to obtain the second time domain resource position. The specific implementation method may be as follows:

[0190] In the first possible implementation, N=1, when the first time domain resource position overlaps with the time domain resource position of CRS, and the frequency domain resource position of the first time domain resource position and / or the first DMRS overlaps with the time-frequency resource position of CORESET, the first time domain resource position is shifted back by 1 to obtain the second time domain resource position.

[0191] Exemplarily, the first DMRS is a FL DMRS, such as Fig.16 As shown, the first time domain resource position is symbol 4, and the first time domain resource position overlaps with the time domain resource positions of CORESET#1 and CRS. Then the terminal device shifts the first time domain resource position back by 1 to obtain the second time domain resource position as symbol 5. It can be seen that the second time domain resource position does not overlap with the time domain resource position of CRS. Fig.17As shown, the first time domain resource position is symbol 4, and the first time domain resource position overlaps with the time domain resource position of CRS. The terminal device shifts the first time domain resource position back by 1 to obtain the second time domain resource position as symbol 5. It can be seen that the second time domain resource position does not overlap with the time domain resource position of CRS.

[0192] A second possible implementation manner, N>1, when the first time domain resource position overlaps with the time domain resource position of the CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the first time domain resource position is shifted back by 1 time to obtain a third time domain resource position;

[0193] When one or more of the following conditions are met, the third time domain resource position is shifted back N-1 times to obtain the second time domain resource position:

[0194] The third time domain resource position overlaps with the time domain resource position of the CRS;

[0195] The third time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET;

[0196] The third time domain resource position overlaps with the time domain resource position of the CRS, and the third time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET.

[0197] For example, Fig.18 As shown, the first time domain resource position is symbol 0, and the first time domain resource position overlaps with the time domain resource position of CORESET#1 and CRS. The terminal device shifts the first time domain resource position back by 1 time to obtain a third time domain resource position as symbol 1, and the third time domain resource position overlaps with the time domain resource position of CORESET#1 and CRS. The third time domain resource position is further shifted back by 1 time to obtain a third time domain resource position as symbol 2, and the third time domain resource position overlaps with the time domain resource position of CORESET#1. The third time domain resource position is further shifted back by 1 time to obtain a second time domain resource position as symbol 3. It can be seen that the second time domain resource position does not overlap with the time domain resource position of CRS.

[0198] S1507: The network device sends a first DMRS at a second time domain resource location. Correspondingly, the terminal device receives the first DMRS at the second time domain resource location. Please refer to the description of S1103 above, and no further details will be given.

[0199] The network device and the terminal device can transmit the above-mentioned first indication information and second indication information on the NR carrier, transmit the third indication information on the LTE carrier, and transmit the fourth indication information on the NR carrier or the LTE carrier. Similarly, this embodiment does not limit the transmission order of the first indication information, the second indication information, the third indication information and the fourth indication information.

[0200] It should be understood that in the above-mentioned embodiments of the application, the size of the sequence number of each process does not mean the order of execution. For example, S1103 can be executed first, and then S1102 can be executed. Specifically, the terminal device receives the scheduling DCI, and the position of the PDSCH can be determined after parsing and processing. Before the network device sends the first DMRS, the time-frequency position of the first DMRS can be determined; or, the terminal device receives the scheduling DCI, the network device sends the PDSCH and the first DMRS, the terminal device receives the PDSCH, and then determines the time domain position of the first DMRS. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application, and is uniformly explained here.

[0201] Different from the prior art, when DMRS overlaps with the time-frequency resource positions of CRS and CORESET at the same time, different execution orders may cause the terminal device to first determine whether CRS collides or CORESET collides, resulting in different execution results, resulting in different positions of PDSCH DMRS movement, causing network equipment and terminal equipment to have different understandings of the position of DMRS after PDSCH DMRS moves due to collision, resulting in the terminal device failing to receive PDSCH. In this embodiment, the movement rules of DMRS when DMRS overlaps with the time-frequency resource positions of CRS and CORESET at the same time are clarified, which can solve the problem in NR and LTE DSS scenarios, when DMRS overlaps with the time-frequency resource positions of CRS and CORESET at the same time, ensuring that the terminal device and the network device have a consistent understanding of the movement of the time domain resource position of DMRS due to the overlap of the time-frequency resource position, thereby improving the transmission success rate.

[0202] Optionally, for the above embodiment, it is possible to count whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS. It should be noted that the count of 1 in the following description can be equivalently understood as counting 1 time to determine whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS.

[0203] In a possible implementation, the terminal device determines whether the first DMRS collides with the CRS. Regardless of whether they collide or not, the number is counted once. It is determined whether the fourth time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS. Even if it is determined that the fourth time domain resource position of the first DMRS does not overlap with the time domain resource position of the CRS, the determination of whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS is counted once. After counting once, it will no longer be determined whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS. For example, Fig.16 In symbol 3, the terminal device determines whether the time-frequency resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, and also determines whether the time-domain resource position of the first DMRS overlaps with the time-domain resource position of the CRS. Although the terminal device determines after the above judgment that the time-domain resource position of the first DMRS does not overlap with the time-domain resource position of the CRS, and the time-frequency resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the terminal device can also count once for determining whether the time-domain resource position of the first DMRS overlaps with the time-domain resource position of the CRS.

[0204] In a possible implementation, when the terminal device determines whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS, the terminal device can count once whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS, regardless of whether the time-frequency resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET. For example, Fig.21 Symbol 4 in the terminal device determines whether the fourth time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS. When the terminal device determines through judgment that the fourth time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS, and the fourth time domain resource position of the first DMRS and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of the CORESET, the terminal device can count 1 time for determining whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS. When the time domain symbol of the first DMRS moves symbol 7, the terminal device no longer determines whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS.

[0205] In a possible implementation, when the terminal device determines whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS, when the terminal device determines through judgment that the time domain resource position of the first DMRS only overlaps with the time domain resource position of the CRS, the terminal device may count once for determining whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS. It can be understood that when the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS, and the time-frequency resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the terminal device may not count once for determining whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS.

[0206] For example, see Fig.19 , Fig.19 FIG. 1 is a schematic diagram of another time domain resource position shift according to an embodiment of the present application. Fig.19 As shown, in Fig.19 In symbol 0, when the time domain resource position of the first DMRS overlaps with the time domain resource position of CRS, and the time-frequency resource position of the first DMRS overlaps with the time-frequency resource position of CORESET, the terminal device may not count once for determining whether the time domain resource position of the first DMRS overlaps with the time domain resource position of CRS. When the time domain symbol of the first DMRS moves to symbol 1, there is still one chance to determine whether the time domain resource position of the first DMRS overlaps with the time domain resource position of CRS. On symbol 1, the terminal device determines whether the time domain resource position of the first DMRS conflicts with the time domain resource position of CRS. After determining that the terminal device determines that the time domain resource position of the first DMRS only overlaps with the time domain resource position of CRS, the terminal device may count once for determining whether the time domain resource position of the first DMRS overlaps with the time domain resource position of CRS, and shift the time domain position of the first DMRS to the next symbol.

[0207] After counting the collision between the first DMRS and CRS once, you can continue to determine whether the time domain resource position of the first DMRS overlaps with the time domain resource position of CRS, or continue to determine whether the time domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET. If they overlap, continue to shift the time domain resource position of the first DMRS.

[0208] Further optionally, in a possible implementation, after counting once, it is no longer necessary to determine whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS. That is to say, in the case where only the time domain resource position of the CRS overlaps with the time domain resource position of the first DMRS, after counting once, the terminal device may no longer determine whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS; in the case where there is a CRS time domain resource position configuration and a CORESET time-frequency resource position configuration, after counting the overlap of the time domain resource position of the first DMRS and the time domain resource position of the CRS, the terminal device no longer determines whether the time domain resource position of the first DMRS overlaps with the time domain resource position of the CRS, but only needs to determine whether the time domain resource position of the first DMRS overlaps with the CORESET time-frequency resource position. If so, continue to shift the time domain resource position of the first DMRS. For example, please refer to Fig. 20 , Fig. 20 FIG. 1 is a schematic diagram of a time domain resource position shift according to an embodiment of the present application. Fig. 20 As shown, the fourth time domain resource position of the first DMRS is symbol 0, which overlaps with the time domain resource position of the CRS. The fourth time domain resource position is shifted back by 1 to obtain the sixth time domain resource position as symbol 1. At this time, it can be counted once, and it is no longer determined whether the first DMRS overlaps with the time domain resource position of the CRS. That is, the terminal device and the network device can transmit the DMRS of the PDSCH at the sixth time domain resource position. For example, please refer to Fig.21 , Fig.21 FIG. 1 is a schematic diagram of a time domain resource position shift according to an embodiment of the present application. Fig.21 As shown, the fourth time domain resource position of the first DMRS is symbol 4, which overlaps with the time domain resource positions of CRS and CORESET#1. The fourth time domain resource position is shifted back by 1 time to obtain the seventh time domain resource position as symbol 5. At this time, it can be counted once, and it is no longer judged whether the first DMRS overlaps with the time domain resource position of CRS. The seventh time domain resource position is symbol 5 and overlaps with the time domain resource position of CORESET#1. The seventh time domain resource position is shifted by 1 time to obtain the seventh time domain resource position as symbol 6. The seventh time domain resource position is symbol 6 and overlaps with the time domain resource position of CORESET#1. The seventh time domain resource position is shifted by 1 time to obtain the sixth time domain resource position as symbol 7. Since it has been counted once, it is no longer judged whether the first DMRS overlaps with the time domain resource position of CRS. The terminal device can no longer judge whether the sixth time domain resource position overlaps with the time domain resource position of CRS. That is to say, the terminal device and the network device can transmit the DMRS of PDSCH at the sixth time domain resource position.

[0209] Different from the prior art, different CRS collision judgment counts may cause different false alarm judgment results of the terminal device for the scheduling scenario, resulting in inconsistent understanding of the terminal device and the network device on the movement of DMRS due to resource collision, thereby failing to transmit PDSCH. In this embodiment, the rules of CRS collision judgment count are clarified, which can solve the problem that in NR and LTE DSS scenarios, when the time-frequency resource positions of DMRS, CRS and CORESET overlap at the same time, the terminal device and the network device can maintain a consistent understanding of the movement of the time domain resource position of DMRS due to the overlap of the time-frequency resource position, thereby improving the transmission success rate.

[0210] Optionally, the network device configures the pattern of LTE CRS, that is, the time-frequency domain resource position of CRS, to the terminal device through high-level parameters (such as RRC parameters) lte-CRS-ToMatchAround, lte-CRS-PatternList1, or lte-CRS-PatternList2. When the duration length of the PDSCH is 10 OFDM symbols, the network device is constrained to configure the starting symbol of the PDSCH to be located at the 5th symbol of a time slot. It can be understood that when the time domain resource position of DMRS overlaps with the time domain resource position of CRS, the prerequisite for causing the time domain resource position of CRS to shift may be that the starting symbol of PDSCH is located at the 5th symbol of a time slot. When the starting symbol of PDSCH is not located at the 5th symbol of a time slot, the overlap of the time domain resource position of DMRS and the time domain resource position of CRS will not cause the time domain resource position of CRS to shift. Accordingly, when the terminal device determines that the starting symbol of the PDSCH is not symbol 5, it is considered that the overlap between the time domain resource position of the DMRS and the time domain resource position of the CRS will not cause the time domain resource position of the CRS to be shifted. When the terminal device determines that the time domain resource position of a DMRS does not overlap with the time domain resource position of the CRS, no shift processing is performed on the DMRS; or the terminal device believes that the DCI scheduling the PDSCH is a false alarm DCI or an erroneous DCI, or the terminal device believes that this is an error scenario (errorcase), and the terminal device will not process / parse the DCI, or discard (drop) the DCI, or skip (skip) the processing of the DCI.

[0211] When the network device configuration satisfies the first constraint, it also needs to satisfy the second constraint, which is: when the continuous symbol of CORESET includes the second symbol of PDSCH, CORESET is configured on the third symbol of PDSCH; or when the continuous symbol of CORESET does not include the second symbol of PDSCH, CORESET is configured or not configured on the third symbol of PDSCH. That is, the network device cannot configure one or more CORESETs for the terminal device on symbol 6 and / or symbol 7 to cause the time-frequency resource position of DMRS to overlap with the time-frequency resource position of the configured CORESET after moving from symbol 5. Among them, when symbol 6 and symbol 7 are configured with CORESET, the configured CORESET can be one CORESET or different CORESETs. For example, the time domain resource position of a CORESET may occupy symbol 6 and symbol 7 at the same time, or symbol 6 and symbol 7 may be occupied by the time domain resource positions of two different CORESETs respectively. A configured CORESET can also be understood as a CORESET associated with a configured search space set. The different configured CORESETs may be different CORESETs associated with one search space set, or may be multiple CORESETs associated with multiple search space sets, where one search space set is associated with one CORESET.

[0212] After the terminal device determines that the first constraint condition is met, it then determines whether the second constraint condition is met. If the second constraint condition is not met (or it can also be understood that if the first constraint condition is met, the second constraint condition is not met), the terminal device believes that the DCI that schedules this PDSCH is a false alarm DCI or an erroneous DCI, or the terminal device believes that this is an error scenario (error case), and the terminal device will not process / parse this DCI, or discard (drop) this DCI, or skip (skip) the processing of this DCI. The terminal device does not expect (does not expect) that the time-frequency resource position of the DMRS on symbol 6 and / or symbol 7 overlaps with the time-frequency resource position of the configured CORESET, or the terminal device does not expect that the FLDMRS is shifted to symbol 6 after the conflict between the time domain resource position of the first DMRS and the time domain resource position of the CRS, and overlaps with the time-frequency resource position of the configured CORESET. It can also be understood that the terminal device does not expect the configured CORESET to be on symbol 6 and / or symbol 7.

[0213] In a possible implementation, an embodiment of the present application provides a communication method, which can be applied to a terminal device, or to a device in a terminal device (for example, a chip, or a chip system, or a circuit), or a device that can be used with a terminal device. The following description is based on the application to a terminal device as an example. The method may include:

[0214] Receive first downlink control information DCI, where the first DCI indicates a time domain resource of a first physical downlink shared channel PDSCH, where a starting symbol of the first PDSCH is a fifth symbol of a first time slot and a duration of the first PDSCH is 10 orthogonal frequency division multiplexing OFDM symbols;

[0215] receiving second indication information, where the second indication information indicates a time domain resource position of a cell-specific reference signal CRS;

[0216] receiving third indication information, where the third indication information indicates a time-frequency resource position of a control resource set CORESET;

[0217] If the CORESET does not satisfy the first constraint, perform at least one of the following:

[0218] Determining that the first DCI is an erroneous DCI;

[0219] discarding the first DCI;

[0220] Not receiving the first PDSCH;

[0221] If the CORESET satisfies the first constraint condition, the first PDSCH is received, and the first constraint condition is at least one of the following: the time domain position of the CORESET does not include the fifth symbol and the sixth symbol in the first time slot, or the time domain position of the CORESET does not include the sixth symbol in the first time slot, or the time domain position of the CORESET does not include the seventh symbol in the first time slot.

[0222] In a possible implementation, the cyclic redundancy check CRC of the first DCI is scrambled by the configured scheduling-radio network temporary identifier CS-RNTI, and the new transmission indication field NDI included in the first DCI takes a value of 0.

[0223] In a possible implementation manner, the receiving the first PDSCH includes:

[0224] The first PDSCH is periodically received.

[0225] In a possible implementation manner, the method further includes:

[0226] It does not expect that CORESET is configured on the 5th symbol / 6th symbol / 7th symbol in the first time slot.

[0227] In a possible implementation, an embodiment of the present application provides a communication method, which can be applied to a network device, or to a device in a network device (for example, a chip, or a chip system, or a circuit), or a device that can be used with a network device. The following description is based on the application to a network device as an example. The method may include:

[0228] Sending second indication information, where the second indication information indicates a time domain resource position of a cell-specific reference signal CRS;

[0229] Sending third indication information, where the third indication information indicates a time-frequency resource position of a control resource set CORESET;

[0230] The CORESET satisfies a first constraint condition, sends first downlink control information DCI, the first DCI indicates a time domain resource of a first physical downlink shared channel PDSCH, a start symbol of the first PDSCH is the fifth symbol of the first time slot and a duration length of the first PDSCH is 10 orthogonal frequency division multiplexing OFDM symbols; the first constraint condition is at least one of the following: the time domain position of the CORESET does not include the fifth symbol and the sixth symbol in the first time slot, or the time domain position of the CORESET does not include the sixth symbol in the first time slot, or the time domain position of the CORESET does not include the seventh symbol in the first time slot;

[0231] The first PDSCH is sent.

[0232] In a possible implementation manner, before sending the first DCI, the method further includes:

[0233] Determine whether the CORESET satisfies the first constraint.

[0234] In a possible implementation, the cyclic redundancy check CRC of the first DCI is scrambled by the configured scheduling-radio network temporary identifier CS-RNTI, and the new transmission indication field NDI included in the first DCI takes a value of 0.

[0235] In a possible implementation manner, the sending the first PDSCH includes:

[0236] The first PDSCH is sent periodically.

[0237] The following describes a communication method provided in an embodiment of the present application. Fig.24 , Fig.24 Schematic diagram of an interaction of a communication method in an embodiment of the present application. Fig.24 As shown, the communication method may include at least the following steps.

[0238] S2401. The network device sends second indication information indicating the time domain resource location of the CRS to the terminal device. Correspondingly, the terminal device receives the second indication information from the network device.

[0239] It can be understood that S2401 corresponds to S1401, and the relevant description in S2401 can refer to the above description of S1401, which will not be repeated here.

[0240] S2402. The network device sends third indication information indicating the time-frequency resource location of CORESET to the terminal device. Correspondingly, the terminal device receives the third indication information from the network device.

[0241] S2403: The network device determines that CORESET satisfies the first constraint condition.

[0242] The first constraint condition can be understood as that at least one of the fifth symbol, the sixth symbol, and the seventh symbol in the first time slot cannot configure the CORESET, that is, the time domain position of the CORESET does not include at least one of the fifth symbol, the sixth symbol, and the seventh symbol. In other words, the first constraint condition can be at least one of the following:

[0243] The time domain position of CORESET does not include the fifth symbol in the first time slot;

[0244] The time domain position of CORESET does not include the sixth symbol in the first time slot;

[0245] The time domain position of CORESET does not include the seventh symbol in the first time slot;

[0246] The time domain position of CORESET does not include the fifth symbol and the sixth symbol in the first time slot;

[0247] The time domain position of CORESET does not include the sixth symbol and the seventh symbol in the first time slot;

[0248] The time domain position of CORESET does not include the fifth symbol, the sixth symbol and the seventh symbol in the first time slot.

[0249] The network device may determine whether the CORESET satisfies the first constraint condition. In a possible implementation, the network device determines that the CORESET satisfies the first constraint condition and executes step S2404.

[0250] It should be noted that when the network device determines whether the CORESET satisfies the first constraint condition, the determination order of the multiple constraints in the first constraint condition is not limited.

[0251] S2404: The network device sends a first DCI indicating time domain resources of a first PDSCH to the terminal device. Accordingly, the terminal device receives the first DCI from the network device.

[0252] The network device can send a first DCI to the terminal device, where the first DCI indicates the time domain resources of the first PDSCH, the starting symbol of the first PDSCH is the fifth symbol of the first time slot and the duration of the first PDSCH is 10 orthogonal frequency division multiplexing OFDM symbols. It can also be understood that the starting symbol of the first PDSCH scheduled by the first DCI is the fifth symbol of the first time slot and the duration of the PDSCH is 10 OFDM symbols.

[0253] The cyclic redundancy check CRC of the first DCI is scrambled by the configured scheduling-radio network temporary identifier CS-RNTI, and the new transmission indicator field (new transmission indicator, NDI) included in the first DCI takes a value of 0.

[0254] S2405. The terminal device determines whether CORESET satisfies the first constraint condition. If not, execute step S2406. If yes, execute step S2407.

[0255] S2406. The terminal device performs at least one of the following: determining that the first DCI is an erroneous DCI; discarding the first DCI; and not receiving the first PDSCH.

[0256] When the terminal device determines that the CORESET does not satisfy the first constraint condition, at least one of the following items may be executed: determining that the first DCI is an erroneous DCI; discarding the first DCI; and not receiving the first PDSCH.

[0257] In order to be able to normally receive the first PDSCH, if the first PDSCH starts from the fifth symbol of the first time slot, the terminal device expects (expects) that CORESET is not configured on the 5th symbol and / or the 6th symbol and / or the 7th symbol in the first time slot. It can also be understood that the terminal device does not expect (does not expect) to configure CORESET on the 5th symbol / 6th symbol / 7th symbol in the first time slot. That is to say, the time domain position of CORESET does not include the fifth symbol and / or the sixth symbol and / or the seventh symbol in the first time slot.

[0258] S2407. The terminal device receives the first PDSCH.

[0259] The terminal device may receive the first PDSCH from the network device on the time domain resources of the first PDSCH.

[0260] In a possible implementation, the network device may periodically send the first PDSCH to the terminal device, and the terminal device may periodically receive the first PDSCH. That is, the network device may periodically send the first PDSCH to the terminal device on the time domain resources of the first PDSCH, and the terminal device may periodically receive the first PDSCH on the time domain resources of the first PDSCH.

[0261] Exemplarily, the terminal device may receive the first PDSCH on the first periodic resource. The first DCI activates the first periodic resource, and the first periodic resource includes the time domain resource of the first PDSCH (PDSCH scheduled without corresponding PDCCH transmission using sps-Config and activated by DCI format1_1 or 1_2). For details, please refer to 3gpp communication protocol 38.213-ga0. For example, please refer to Fig.25 , Fig.25 FIG. 1 is a schematic diagram of a periodic transmission of a first PDSCH provided by an embodiment of the present application. Fig.25 As shown, the first DCI can be used to activate the first periodic resource, the first PDSCH can be any PDSCH among multiple PDSCHs, the first periodic resource can be authorized once and used periodically, and subsequent terminal devices can periodically receive downlink data through PDSCH, which can effectively save the system's PDSCH resources for scheduling indications.

[0262] It should be understood that in this embodiment, there is no restriction on the transmission order of the second indication information and the third indication information. For example, the second indication information may be transmitted first and then the third indication information, or the third indication information may be transmitted first and then the second indication information, or the second indication information and the third indication information may be transmitted simultaneously. The size of the sequence number of each process does not mean the order of execution. For example, S2401 may be executed first and then S2402, or S2403 may be executed first and then S2402, or S2402 and S2403 may be executed simultaneously. For another example, S2403 and S2404 may be executed first and then S2405, or S2405 may be executed first and then S2403 and S2404 (i.e., the execution order of the terminal device determining whether the CORESET satisfies the first constraint condition and receiving the first DCI is not limited). The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application, and is explained uniformly here.

[0263] In this embodiment, the terminal device can determine whether the CORESET configured by the network device satisfies the first constraint condition. If not, it can determine that the first DCI is an erroneous DCI, and discard the first DCI and / or not receive the first PDSCH; if it is satisfied, it can receive the first PDSCH, thereby improving the transmission success rate.

[0264] In addition, it should be noted that in the above Fig.24 The example description is given by taking the case where the starting symbol of the first PDSCH is the fifth symbol of the first time slot and the duration of the first PDSCH is 10 orthogonal frequency division multiplexing OFDM symbols as an example. The starting symbol of the first PDSCH may also not be the fifth symbol of the first time slot, but other symbols of the first time slot. When the starting symbol of the first PDSCH is other symbols of the first time slot, the above-mentioned first constraint condition also changes accordingly.

[0265] For example, when the starting symbol of the first PDSCH is the first symbol of the first time slot, it may correspond to the second constraint condition, and the second constraint condition may be at least one of the following: the time domain position of CORESET does not include the first symbol and the second symbol in the first time slot, or the time domain position of CORESET does not include the second symbol in the first time slot, or the time domain position of CORESET does not include the third symbol in the first time slot, or the time domain position of CORESET does not include the fourth symbol in the first time slot.

[0266] For another example, when the starting symbol of the first PDSCH is the second symbol of the first time slot:

[0267] When the LTE-CRS is configured as 1-antennaport, a third constraint condition may be applied, and the third constraint condition may be at least one of the following:

[0268] The time domain position of CORESET does not include the fifth symbol in the first time slot;

[0269] The time domain position of CORESET does not include the sixth symbol in the first time slot;

[0270] The time domain position of CORESET does not include the seventh symbol in the first time slot;

[0271] The time domain position of CORESET does not include the fifth symbol and the sixth symbol in the first time slot;

[0272] The time domain position of CORESET does not include the sixth symbol and the seventh symbol in the first time slot;

[0273] The time domain position of CORESET does not include the fifth symbol, the sixth symbol and the seventh symbol in the first time slot.

[0274] When LTE-CRS is configured as 2-antennaport, it may correspond to the fourth constraint condition, and the fourth constraint condition may be: the time domain position of CORESET does not include the second symbol in the first time slot.

[0275] For another example, when the starting symbol of the first PDSCH is the third symbol or the fourth symbol of the first time slot, a fifth constraint condition may be corresponded, and the fifth constraint condition may be at least one of the following:

[0276] The time domain position of CORESET does not include the fifth symbol in the first time slot;

[0277] The time domain position of CORESET does not include the sixth symbol in the first time slot;

[0278] The time domain position of CORESET does not include the seventh symbol in the first time slot;

[0279] The time domain position of CORESET does not include the fifth symbol and the sixth symbol in the first time slot;

[0280] The time domain position of CORESET does not include the sixth symbol and the seventh symbol in the first time slot;

[0281] The time domain position of CORESET does not include the fifth symbol, the sixth symbol and the seventh symbol in the first time slot.

[0282] It is understandable that, in order to implement the functions in the above embodiments, the terminal device and the network device include hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and method steps of each example described in the embodiments disclosed in this application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application scenario and design constraints of the technical solution.

[0283] Fig. 22 and Fig.23 is a schematic diagram of the structure of possible communication devices provided by the embodiments of the present application. These communication devices can be used to implement the functions of the terminal device or network device in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments. In the embodiments of the present application, the communication device can be as follows Figure 5 One of the terminal devices 120a-120j shown may also be Figure 5 The network device 110a or 110b shown may also be a module (such as a chip) applied to a terminal device or a network device.

[0284] like Fig. 22 As shown, the communication device 2200 includes a processing unit 2201 and a transceiver unit 2202. The communication device 2200 is used to implement the above Fig.11 , Fig.14 or Fig.15 The functions of the terminal device or the network device in the method embodiment shown in FIG.

[0285] When the communication device 2200 is used to implement Fig.11 and Fig.14 The functions of the terminal device in the method embodiment shown are:

[0286] The processing unit 2201 is used to determine a first time domain resource position of a first DMRS and a time domain resource position of a CRS, the time domain resource position of the CRS overlaps with the first time domain resource position, and the first time domain resource position can be shifted N times to obtain a second time domain resource position, and the second time domain resource position does not overlap with the time domain resource position of the CRS, N is a positive integer, wherein the first DMRS is a FL DMRS or the first DMRS includes a FL DMRS and an additional DMRS;

[0287] The transceiver unit 2202 is configured to receive a first DMRS at a second time domain resource position.

[0288] In a possible implementation, the transceiver unit 2202 is further used to receive first indication information and second indication information, the first indication information indicates resource information of the PDSCH of mapping type B, and the second indication information indicates the time domain resource position of the CRS.

[0289] In a possible implementation, the transceiver unit 2202 receives the first indication information and the second indication information on the NR carrier, and the time domain resource position of the CRS is located in the overlapping area of ​​the NR carrier and the LTE carrier.

[0290] When the communication device 2200 is used to implement Fig.11 The functions of the network device in the method embodiment shown are:

[0291] The processing unit 2201 is used to determine a first time domain resource position of a first DMRS and a time domain resource position of a CRS, where the time domain resource position of the CRS overlaps with the first time domain resource position; the first time domain resource position is shifted N times to obtain a second time domain resource position, where the second time domain resource position does not overlap with the time domain resource position of the CRS; the first DMRS is a FL DMRS, or the first DMRS includes a FL DMRS and an additional DMRS, and N is a positive integer;

[0292] The transceiver unit 2202 is configured to send a first DMRS at a second time domain resource position.

[0293] In a possible implementation, the transceiver unit 2202 is further used to send first indication information and second indication information, the first indication information indicates resource information of the PDSCH of mapping type B, and the second indication information indicates the time domain resource position of the CRS.

[0294] In a possible implementation method, the transceiver unit 2202 sends the first indication information and the second indication information on the NR carrier, and the time domain resource position of the CRS is located in the overlapping area of ​​the NR carrier and the LTE carrier.

[0295] When the communication device 2200 is used to implement Fig.11 In the method embodiment shown, the functions of the terminal device or the network device are:

[0296] A possible implementation method is that N>1, and the processing unit 2201 shifts the first time domain resource position back N times to obtain the second time domain resource position, and is specifically used to shift the first time domain resource position back 1 time to obtain the third time domain resource position; when the third time domain resource position overlaps with the time domain resource position of CRS, the third time domain resource position is shifted back N-1 times to obtain the second time domain resource position.

[0297] In a possible implementation, the resource information of PDSCH includes the fourth time domain resource position of the first DMRS; the processing unit 2201 determines the first time domain resource position of the first DMRS, specifically for determining the fourth time domain resource position as the first time domain resource position according to the first indication information.

[0298] In a possible implementation, shifting back N times is to add N to the symbol index corresponding to the time domain resource position.

[0299] In a possible implementation manner, the collision between the first DMRS and the CRS is counted once.

[0300] For a more detailed description of the processing unit 2201 and the transceiver unit 2202, please refer to Fig.11 The method embodiment shown is described in detail.

[0301] When the communication device 2200 is used to implement Fig.15 The functions of the terminal device in the method embodiment shown are:

[0302] Processing unit 2201 is used to determine the first time domain resource position of the first DMRS and the time domain resource position of the CRS. The time domain resource position of the CRS overlaps with the first time domain resource position. The first time domain resource position can be shifted back N times to obtain the second time domain resource position. The second time domain resource position does not overlap with the time domain resource position of the CRS. N is a positive integer, wherein the first DMRS is a FL DMRS or the first DMRS includes a FL DMRS and an additional DMRS.

[0303] The transceiver unit 2202 is configured to receive a first DMRS at a second time domain resource position.

[0304] In a possible implementation, the transceiver unit 2202 is further used to receive first indication information and second indication information, the first indication information indicates resource information of the PDSCH of mapping type B, and the second indication information indicates the time domain resource position of the CRS.

[0305] In a possible implementation, the transceiver unit 2202 receives the first indication information and the second indication information on the NR carrier, and the time domain resource position of the CRS is located in the overlapping area of ​​the NR carrier and the LTE carrier.

[0306] In a possible implementation, the transceiver unit 2202 is further used to receive third indication information and fourth indication information, the third indication information indicates the time-frequency resource position of the control resource set CORESET, and the fourth indication information indicates the frequency domain resource position of the first DMRS.

[0307] When the communication device 2200 is used to implement Fig.15 The functions of the network device in the method embodiment shown are:

[0308] The processing unit 2201 is used to determine a first time domain resource position of a first DMRS and a time domain resource position of a CRS, where the time domain resource position of the CRS overlaps with the first time domain resource position; the first time domain resource position is shifted N times to obtain a second time domain resource position, where the second time domain resource position does not overlap with the time domain resource position of the CRS, where N is a positive integer; the first DMRS is a FL DMRS, or the first DMRS includes a FL DMRS and an additional DMRS;

[0309] The transceiver unit 2202 is configured to send a first DMRS at a second time domain resource position.

[0310] In a possible implementation, the transceiver unit 2202 is further used to send first indication information and second indication information, the first indication information indicates resource information of the PDSCH of mapping type B, and the second indication information indicates the time domain resource position of the CRS.

[0311] In a possible implementation method, the transceiver unit 2202 sends the first indication information and the second indication information on the NR carrier, and the time domain resource position of the CRS is located in the overlapping area of ​​the NR carrier and the LTE carrier.

[0312] In a possible implementation manner, the transceiver unit 2202 is further configured to send third indication information and fourth indication information, where the third indication information indicates the time-frequency resource position of the CORESET, and the fourth indication information indicates the frequency domain resource position of the first DMRS.

[0313] When the communication device 2200 is used to implement Fig.15 In the method embodiment shown, the functions of the terminal device or the network device are:

[0314] A possible implementation method is that N>1, and the processing unit 2201 shifts the first time domain resource position back N times to obtain the second time domain resource position, and is specifically used to shift the first time domain resource position back 1 time to obtain the third time domain resource position; when the third time domain resource position overlaps with the time domain resource position of CRS, the third time domain resource position is shifted back N-1 times to obtain the second time domain resource position.

[0315] A possible implementation method is that N=1, and the processing unit 2201 shifts the first time domain resource position back N times to obtain a second time domain resource position, which is specifically used to shift the first time domain resource position back 1 time to obtain the second time domain resource position when the first time domain resource position overlaps with the time domain resource position of CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET.

[0316] A possible implementation method is that N>1, and the processing unit 2201 shifts the first time domain resource position back N times to obtain a second time domain resource position, specifically when the first time domain resource position overlaps with the time domain resource position of CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET, the first time domain resource position is shifted back 1 time to obtain a third time domain resource position; when one or more of the following conditions are met, the third time domain resource position is shifted back N-1 times to obtain the second time domain resource position: the third time domain resource position overlaps with the time domain resource position of CRS; the third time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET; the third time domain resource position overlaps with the time domain resource position of CRS, and the third time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET.

[0317] In a possible implementation, the resource information of PDSCH includes the fourth time domain resource position of the first DMRS; the processing unit 2201 determines the first time domain resource position of the first DMRS, specifically for determining the fourth time domain resource position as the first time domain resource position according to the first indication information.

[0318] In a possible implementation, the resource information of PDSCH includes the fourth time domain resource position of the first DMRS; the processing unit 2201 determines the first time domain resource position of the first DMRS, and is specifically used to shift the fourth time domain resource position back M times to obtain the first time domain resource position according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, where M is a positive integer.

[0319] A possible implementation method, M≥1, the processing unit 2201 shifts the fourth time domain resource position back M times to obtain the first time domain resource position according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, and is specifically used for shifting the fourth time domain resource position back M times to obtain the first time domain resource position when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET.

[0320] A possible implementation method, M≥1, the processing unit 2201 shifts the fourth time domain resource position back M times to obtain the first time domain resource position according to at least one of the time domain resource position of CRS, the time-frequency resource position of CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, which is specifically used when the fourth time domain resource position overlaps with the time domain resource position of CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET.

[0321] A possible implementation manner, when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or when the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the processing unit 2201 shifts the fourth time domain resource position backward M times to obtain the first time domain resource position, specifically for when the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or when the fourth time domain resource position overlaps with the time-frequency resource position of the CRS When the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET, the fourth time domain resource position is shifted back by 1 time to obtain the fifth time domain resource position; when one or more of the following conditions are met, the fifth time domain resource position is shifted back by M-1 times to obtain the first time domain resource position: the fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET; the fifth time domain resource position overlaps with the time domain resource position of CRS, and the fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlap with the time-frequency resource position of CORESET.

[0322] In a possible implementation, shifting back N times is to add N to the symbol index corresponding to the time domain resource position.

[0323] In a possible implementation manner, the collision between the first DMRS and the CRS is counted once.

[0324] For a more detailed description of the processing unit 2201 and the transceiver unit 2202, please refer to Fig.15 The method embodiment shown is described in detail.

[0325] like Fig.23As shown, the communication device 2300 includes a processor 2301 and an interface circuit 2302. The processor 2301 and the interface circuit 2302 are coupled to each other. It is understood that the interface circuit 2302 can be a transceiver or an input-output interface. Optionally, the communication device 2300 may also include a memory 2303 for storing instructions executed by the processor 2301 or storing input data required by the processor 2301 to run the instructions or storing data generated after the processor 2301 runs the instructions.

[0326] When the communication device 2300 is used to implement Fig.11 , Fig.14 or Fig.15 When the method is shown, the processor 2301 is used to implement the functions of the above-mentioned processing unit 2201, and the interface circuit 2302 is used to implement the functions of the above-mentioned transceiver unit 2202.

[0327] When the above communication device is a chip applied to a terminal device, the terminal chip implements the functions of the terminal device in the above method embodiment. The terminal chip receives information sent by the network device to the terminal device through other modules in the terminal device (such as a radio frequency module or an antenna); or, the terminal chip sends information to other modules in the terminal device (such as a radio frequency module or an antenna), and the information is sent by the terminal device to the network device.

[0328] When the above-mentioned communication device is a module applied to a network device, the network device module implements the function of the network device in the above-mentioned method embodiment. The network device module receives information from other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the terminal device to the network device; or, the network device module sends information to other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the network device to the terminal device. The network device module here can be a baseband chip of a network device, or a CU, DU or other module, or a device under an open radio access network (O-RAN) architecture, such as an open CU, an open DU and other devices.

[0329] It is understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0330] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions that can be executed by a processor. The software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a base station or a terminal. The processor and the storage medium can also be present in a base station or a terminal as discrete components.

[0331] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it 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 programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is executed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device or other programmable device. The computer program or instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instruction may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server, data center, etc. that integrates one or more available media. The available medium may be a magnetic medium, for example, a floppy disk, a hard disk, a tape; it may also be an optical medium, for example, a digital video disc; it may also be a semiconductor medium, for example, a solid-state hard disk. The computer-readable storage medium may be a volatile or nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.

[0332] In the various embodiments of the present application, unless otherwise specified or provided in a logical conflict, the terms and / or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.

[0333] In the present application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In the text description of the present application, the character " / " generally indicates that the previous and next associated objects are in an "or" relationship; in the formula of the present application, the character " / " indicates that the previous and next associated objects are in a "division" relationship. "Including at least one of A, B and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0334] It is understood that the various numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic.

Claims

1. A communication method, characterized in that: include: Determine a first time domain resource position of a first demodulation reference signal DMRS and a time domain resource position of a cell-specific reference signal CRS, wherein the time domain resource position of the CRS overlaps with the first time domain resource position; Shifting the first time domain resource position backward N times to obtain a second time domain resource position, where the second time domain resource position does not overlap with the time domain resource position of the CRS, and N is a positive integer; The first DMRS is a front-loaded (FL) DMRS, or the first DMRS includes a FL DMRS and an additional DMRS; The first DMRS is received at the second time domain resource position.

2. The method according to claim 1, characterized in that: The method further comprises: First indication information and second indication information are received, wherein the first indication information indicates resource information of a physical downlink shared channel PDSCH of mapping type B, and the second indication information indicates a time domain resource position of a CRS.

3. The method according to claim 2, characterized in that The first indication information and the second indication information are received on a new radio interface NR carrier, and the time domain resource position of the CRS is located in an overlapping area between the NR carrier and a long term evolution LTE carrier.

4. The method according to claim 2 or 3, characterized in that: N>1, the step of shifting the first time domain resource position backward N times to obtain the second time domain resource position includes: Shifting the first time domain resource position backward by 1 time to obtain a third time domain resource position; When the third time domain resource position overlaps with the time domain resource position of the CRS, the third time domain resource position is shifted backward N-1 times to obtain the second time domain resource position.

5. The method according to claim 2 or 3, characterized in that: The method further comprises: Receive third indication information and fourth indication information, the third indication information indicating the time-frequency resource position of the control resource set CORESET, and the fourth indication information indicating the frequency domain resource position of the first DMRS.

6. The method according to claim 5, characterized in that N=1, the step of shifting the first time domain resource position backward N times to obtain the second time domain resource position includes: When the first time domain resource position overlaps with the time domain resource position of the CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the first time domain resource position is shifted back by 1 to obtain the second time domain resource position.

7. The method according to claim 5, characterized in that N>1, the step of shifting the first time domain resource position backward N times to obtain the second time domain resource position includes: When the first time domain resource position overlaps with the time domain resource position of the CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the first time domain resource position is shifted back by 1 time to obtain a third time domain resource position; When one or more of the following conditions are met, the third time domain resource position is shifted back N-1 times to obtain the second time domain resource position: The third time domain resource position overlaps with the time domain resource position of the CRS; The third time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET; The third time domain resource position overlaps with the time domain resource position of the CRS, and the third time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET.

8. The method according to any one of claims 2 to 7, characterized in that: The resource information of the PDSCH includes a fourth time domain resource position of the first DMRS; Determining a first time domain resource position of the first DMRS includes: The fourth time domain resource position is determined as the first time domain resource position according to the first indication information.

9. The method according to any one of claims 2 to 7, characterized in that: The resource information of the PDSCH includes a fourth time domain resource position of the first DMRS; Determining a first time domain resource position of the first DMRS includes: According to at least one of the time domain resource position of the CRS, the time-frequency resource position of the CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position, where M is an integer greater than or equal to 0.

10. The method according to claim 9, characterized in that M≥1, the step of shifting the fourth time domain resource position backward M times to obtain the first time domain resource position according to at least one of the time domain resource position of the CRS, the time-frequency resource position of the CORESET, the fourth time domain resource position, and the frequency domain resource position of the first DMRS includes: When the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position.

11. The method according to claim 9, characterized in that M≥1, the step of shifting the fourth time domain resource position backward M times to obtain the first time domain resource position according to at least one of the time domain resource position of the CRS, the time-frequency resource position of the CORESET, the fourth time domain resource position, and the frequency domain resource position of the first DMRS includes: When the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET.

12. The method according to claim 10 or 11, characterized in that: When the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or when the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, shifting the fourth time domain resource position back M times to obtain the first time domain resource position, including: When the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or When the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the fourth time domain resource position is shifted back by 1 to obtain a fifth time domain resource position; When one or more of the following conditions are met, the fifth time domain resource position is shifted back M-1 times to obtain the first time domain resource position: The fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET; The fifth time domain resource position overlaps with the time domain resource position of the CRS, and the fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET.

13. The method according to any one of claims 1-12, wherein the shifting back N times is to add N to the symbol index corresponding to the time domain resource position.

14. A communication method, characterized in that: include: Determine a first time domain resource position of a first demodulation reference signal DMRS and a time domain resource position of a cell-specific reference signal CRS, wherein the time domain resource position of the CRS overlaps with the first time domain resource position; Shifting the first time domain resource position backward N times to obtain a second time domain resource position, where the second time domain resource position does not overlap with the time domain resource position of the CRS, and N is a positive integer; The first DMRS is a first column FL DMRS, or the first DMRS includes a FL DMRS and an additional DMRS; The first DMRS is sent at the second time domain resource position.

15. The method according to claim 14, characterized in that The method further comprises: First indication information and second indication information are sent, wherein the first indication information indicates resource information of a physical downlink shared channel PDSCH of mapping type B, and the second indication information indicates a time domain resource position of a CRS.

16. The method according to claim 15, characterized in that The first indication information and the second indication information are sent on a new radio interface NR carrier, and the time domain resource position of the CRS is located in an overlapping area between the NR carrier and the long term evolution LTE carrier.

17. The method according to claim 15 or 16, characterized in that N>1, the step of shifting the first time domain resource position backward N times to obtain the second time domain resource position includes: Shifting the first time domain resource position backward by 1 time to obtain a third time domain resource position; When the third time domain resource position overlaps with the time domain resource position of the CRS, the third time domain resource position is shifted backward N-1 times to obtain the second time domain resource position.

18. The method according to claim 15 or 16, characterized in that The method further comprises: Send third indication information and fourth indication information, wherein the third indication information indicates the time-frequency resource position of the control resource set CORESET, and the fourth indication information indicates the frequency domain resource position of the first DMRS.

19. The method according to claim 18, characterized in that N=1, the step of shifting the first time domain resource position backward N times to obtain the second time domain resource position includes: When the first time domain resource position overlaps with the time domain resource position of the CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the first time domain resource position is shifted back by 1 to obtain the second time domain resource position.

20. The method according to claim 18, characterized in that N>1, the step of shifting the first time domain resource position backward N times to obtain the second time domain resource position includes: When the first time domain resource position overlaps with the time domain resource position of the CRS, and the first time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the first time domain resource position is shifted back by 1 time to obtain a third time domain resource position; When one or more of the following conditions are met, the third time domain resource position is shifted back N-1 times to obtain the second time domain resource position: The third time domain resource position overlaps with the time domain resource position of the CRS; The third time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET; The third time domain resource position overlaps with the time domain resource position of the CRS, and the third time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET.

21. The method according to any one of claims 15 to 20, characterized in that: The resource information of the PDSCH includes a fourth time domain resource position of the first DMRS; Determining a first time domain resource position of the first DMRS includes: The fourth time domain resource position is determined as the first time domain resource position according to the first indication information.

22. The method according to any one of claims 15 to 20, characterized in that: The resource information of the PDSCH includes a fourth time domain resource position of the first DMRS; Determining a first time domain resource position of the first DMRS includes: According to at least one of the time domain resource position of the CRS, the time-frequency resource position of the CORESET, the fourth time domain resource position and the frequency domain resource position of the first DMRS, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position, where M is a positive integer.

23. The method according to claim 22, characterized in that M≥1, the step of shifting the fourth time domain resource position backward M times to obtain the first time domain resource position according to at least one of the time domain resource position of the CRS, the time-frequency resource position of the CORESET, the fourth time domain resource position, and the frequency domain resource position of the first DMRS includes: When the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of CORESET, the fourth time domain resource position is shifted back M times to obtain the first time domain resource position.

24. The method according to claim 22, characterized in that M≥1, the step of shifting the fourth time domain resource position backward M times to obtain the first time domain resource position according to at least one of the time domain resource position of the CRS, the time-frequency resource position of the CORESET, the fourth time domain resource position, and the frequency domain resource position of the first DMRS includes: When the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET.

25. The method according to claim 23 or 24, characterized in that When the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or when the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, shifting the fourth time domain resource position back M times to obtain the first time domain resource position, including: When the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, or When the fourth time domain resource position overlaps with the time domain resource position of the CRS, and the fourth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET, the fourth time domain resource position is shifted back by 1 to obtain a fifth time domain resource position; When one or more of the following conditions are met, the fifth time domain resource position is shifted back M-1 times to obtain the first time domain resource position: The fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET; The fifth time domain resource position overlaps with the time domain resource position of the CRS, and the fifth time domain resource position and / or the frequency domain resource position of the first DMRS overlaps with the time-frequency resource position of the CORESET.

26. The method according to any one of claims 14-25, wherein the shifting back N times is to add N to the symbol index corresponding to the time domain resource position.

27. A communication device, characterized in that: The method comprises a unit for executing the method according to any one of claims 1 to 13, or comprises a unit for executing the method according to any one of claims 14 to 26.

28. A communication device, characterized in that: It includes a processor and an interface circuit, wherein the interface circuit is used to receive signals from other communication devices and transmit them to the processor or send signals from the processor to other communication devices, and the processor is used to implement the method as described in any one of claims 1 to 26 through logic circuits or executing code instructions.

29. A computer-readable storage medium, characterized in that: The storage medium stores a computer program or an instruction, and when the computer program or the instruction is executed by the communication device, the method according to any one of claims 1 to 26 is implemented.

30. A computer program product, characterized in that The computer program product comprises instructions, which, when executed by a processor, enable the method according to any one of claims 1 to 26 to be implemented.

31. A communication system, characterized in that: It comprises a terminal device and a network device, wherein the terminal device is used to implement the method according to any one of claims 1 to 13, and the network device is used to execute the method according to any one of claims 14 to 26.

Images