The number of a symbol corresponding to DMRS transmission in the slot (i.e., l is 11,12,13 for mode 1-1, l is 11,13 for mode 1-2, and l is 13 for mode 1-3) is calculated according to the followingformula 1 orformula 2 to obtain a base sequence of the DMRS;

mode 3-2: the DMRS sequence determines the DMRS sequence based on the time slot number of the first 1 or the last 1 available retransmission opportunity and the symbol number of the DMRS in the unavailable retransmission opportunity; i.e. according to the slot number

DMRS numbering (l-11, 12,13 for modes 1-1, l-11, 13 for modes 1-2, l-13 for modes 1-3), and calculating a base sequence of the DMRS according to the followingformula 1 orformula 2;

mode 3 to 3: the DMRS sequence is the same as the DMRS sequence in the first 1 or last 1 available repetition opportunity; for example, the same as the DMRS sequence in slot n +1, then since the DMRS in slot n +1 was transmitted on symbols numbered 9 and 13, only symbol 13, which corresponds to the DMRS symbol transmitted in slot n +2 determined in the above-described manners 1-1 to 1-3, then the number of the slot is based on

The DMRS number l is 13, and a base sequence of the DMRS on the symbol numbered 13 is calculated according to the following formula, the DMRS sequence determined in this manner is transmitted on the symbol numbered 13 in the slot n +2, symbols which are not included in the DMRS symbol transmitted in the slot n +1, such as the symbols numbered 11 and 12, are determined for the modes 1 to 1, symbols which are not included in the DMRS symbol transmitted in the slot n +1, such as the symbol numbered 11, are determined for the modes 1 to 2, and each DMRS symbol needs to be determined in one of the above-described modes 3 to 1 or 3 to 2, such as the symbol numbered 11Transmitting the DMRS sequences on the symbols;

mode 3 to 4: the DMRS sequence is the same as the DMRS sequence in each available repetition opportunity; at this time, it is equivalent to assume that the DMRS is calculated according to the followingformula 2, and the condition that the pseudo-random sequence is not used is satisfied, the DMRS sequences on any symbol in any repetition are the same, the symbol for transmitting the DMRS is determined in an unavailable repetition opportunity, and the DMRS is transmitted according to any symbol in any repetition;

in each of the above manners, after the DMRS generation manner is determined, the manner of generating a DMRS on one symbol in a corresponding manner may be referred to in the existing protocol contents.

Equation 1: for PUSCH without pre-Transform (Discrete Fourier Transform, DFT), the DMRS sequence on each symbol is calculated as follows:

wherein the pseudo-random sequence c () is initialized according to the following formula 1.1, wherein,

is the number of symbols contained in a slot,

is the slot number in one radio frame, l is the symbol number in one slot,

for the cell ID used for calculation of DMRS (which may be determined according to the configuration of higher layer signaling or directly as the current cell ID),

is a value derived from higher layer signaling (for semi-static transmission) or DCI notification; n is a number from 0 to M-1, where M is the sequence length.

Equation 1.1:

equation 2: for PUSCH with pre-transform, the DMRS sequence on each symbol is calculated as follows:

wherein,

for a ZC sequence determined according to the related art, if a low Peak-to-Average Power Ratio (PAPR) sequence type1 is used for generation, a DMRS sequence generated on each symbol of each slot is the same regardless of a pseudo-random sequence c (), if a low PAPR sequence type2 is used for generation, and when a generated sequence length is less than 30, a DMRS sequence generated on each symbol of each slot is the same regardless of a pseudo-random sequence c (), and when a generated sequence length is greater than or equal to 30,

is generated based on a pseudo-random sequence, wherein the pseudo-random sequence c () is initialized according to the following equation 2.1, wherein,

is the number of symbols contained in a slot,

is the slot number in one radio frame, l is the symbol number in one slot,

for the cell ID used to calculate the DMRS (which may be determined from the configuration of higher layer signaling or directly as the current cell ID), n_SCIDIs a value derived from higher layer signaling (for semi-static transmission) or DCI notification;

the number of Subcarriers (SC) corresponding to the frequency domain resource represented as PUSCH; δ is expressed as a parameter for calculating the DMRS sequence length, assuming δ to be 1, for example.

Equation 2.1:

4) the terminal transmits the DMRS according to the time domain resource and the frequency domain resource of the DMRS determined by the method and the generated DMRS sequence, wherein the step of determining the time domain resource and the frequency domain resource is not performed in sequence; if the DMRS needs to be precoded, the precoding scheme used needs to be the same as the precoding scheme used in other retransmission opportunities in the time slot n +2 (e.g., the retransmission opportunities in the time slots n, n +1, and n + 3), or the retransmission opportunities adjacent to the time slot 2 (e.g., the retransmission opportunities in the time slots n +1 and n + 3), so that the base station can use the DMRSs in these time slots to perform joint channel estimation.

For the base station side:

determining that the PUSCH is received on 10 th to 14 th symbols in time slots n, n +1 and n +3 according to the judgment mode consistent with the terminal side, wherein the DMRS of the PUSCH is transmitted on the 1 st and the last symbols in the 5 occupied symbols; in the time slot n +2, the DMRS is received only on the symbol that is used for transmitting the DMRS corresponding to the terminal (the specific way for determining the DMRS transmission symbol, the frequency domain resource, and the DMRS sequence is the same as that of the terminal side, which is not described here again), wherein, when the terminal transmits the DMRS, the terminal ensures that the precoding way of the DMRS in the time slot n +2 is the same as that of the PUSCH transmitted in the preceding and/or following retransmission opportunity, so that joint channel estimation can be achieved, that is, channel estimation is performed based on the DMRS in the time slot and the DMRS in the preceding and/or following retransmission opportunity, so that the performance of channel estimation is improved, and the transmission performance of repeated transmission of the PUSCH is improved.

In the above embodiment, taking PUSCH as an example, whether PUSCH employs a frequency hopping scheme may correspond to different DMRS transmission schemes, but all are specified by the existing protocol, and all may be applicable to the above scheme to perform DMRS transmission in an unavailable retransmission opportunity; whether the PUSCH adopts a pre-Transform mode (i.e. whether the waveform is based on Discrete Fourier Transform-Spread OFDM (DFT-s-OFDM) or Cyclic Prefix OFDM (Cyclic Prefix OFDM, CP-OFDM) may use the above-mentioned mode, and the different mode is that different waveform DMRSs are generated and mapped, specifically referring to the specification of the prior art, the above-mentioned example only takes that the repeated transmission resources of the PUSCH in each slot are the same, and if the configuration or scheduling signaling may indicate the transmission resources of each repetition, at least one of the position and size of the symbol set of each repetition opportunity may be different, and the frequency domain resources may also be different;

it should be noted that, the foregoing embodiment only uses PUSCH as an example, and details the transmission method according to the embodiment of the present invention are described. When the transmission method is applied to channel transmission of PUCCH, PDSCH, PDCCH and the like, a similar mode can be adopted, but the transmission pattern of the DMRS is determined according to the definition mode of each channel; if the channel is a downlink channel, such as a PDSCH, a PDCCH, and the like, the terminal behavior is to receive the DMRS in an unavailable repetition opportunity, and the base station behavior is to transmit the DMRS in an unavailable opportunity.

In addition, the DL symbol configured only by the high layer signaling is taken as an example of the unavailable symbol, and other unavailable symbol definitions, such as an SSB symbol, a symbol indicated as Flexible by SFI in the case of CG PUSCH (this symbol of the high layer signaling configuration is also a Flexible symbol), and the like are also applicable to the above-described manner; the definition of the unusable symbols may be different for different channels, and these variations are included in the transmission method according to the invention.

Another embodiment of the present invention further provides a transmission method applied to a receiving end, as shown in fig. 8, the method includes:

s801, in a channel configured with repeated transmission, if an unavailable repeated opportunity exists in N repeated opportunities, only a demodulation reference signal DMRS is received in the unavailable repeated opportunity;

slot-based repetition opportunities;

a repetition opportunity based on repetition type a;

a repetition opportunity based on repetition type B.

Optionally, in the transmission method, when N repetition opportunities are repetition opportunities based on a repetition type B, if an actual repetition opportunity includes a symbols and the number of symbols allocated to each repetition opportunity is not a, it is determined that the actual repetition opportunity is an unavailable repetition opportunity;

wherein A is a predefined or configured integer greater than 0.

receiving the DMRS on a corresponding symbol of the unavailable repetition opportunity.

a seventh mode: determining the transmitted DMRS sequence by reusing any one of the first to fifth ways for a DMRS transmission symbol that is not included in DMRS transmission symbols of the available repetition opportunity when the DMRS sequence is the same as a DMRS sequence in one available repetition opportunity before the unavailable repetition opportunity or one available repetition opportunity after the unavailable repetition opportunity.

Optionally, the transmission method further includes:

An embodiment of the present invention further provides a transmission apparatus, as shown in fig. 9, including amemory 901, atransceiver 902, and a processor 903:

amemory 901 for storing a computer program; atransceiver 902 for transceiving data under the control of theprocessor 903; aprocessor 903 for reading the computer program in thememory 901 and performing the following operations:

Optionally, in the transmission apparatus, the channel configured for repeated transmission is an uplink channel or a downlink channel; and/or

slot-based repetition opportunities;

a repetition opportunity based on repetition type a;

a repetition opportunity based on repetition type B.

Optionally, the transmitting apparatus, wherein in the unavailable repetition opportunity, theprocessor 903 transmits only the DMRS as the demodulation reference signal by at least one of:

wherein A is a predefined or configured integer greater than 0.

Optionally, the transmission apparatus, wherein theprocessor 903 transmits only the DMRS in the unavailable repetition opportunity, and includes:

Optionally, the transmitting apparatus, wherein theprocessor 903 is further configured to determine a frequency domain resource for transmitting the DMRS in the unavailable repetition opportunity by using one of:

Optionally, the transmission apparatus is further configured to determine the DMRS sequence for transmitting the DMRS in the unavailable repetition opportunity by using theprocessor 903, in one of the following manners:

Optionally, in the transmission apparatus, theprocessor 903 is further configured to determine the precoding used by the DMRS sequence by using one of the following manners:

Optionally, the transmission apparatus, wherein theprocessor 903 is further configured to:

Optionally, in the transmission apparatus, theprocessor 903 is further configured to:

In the transmission apparatus according to this embodiment, the transmission apparatus may be a terminal or a network side device.

In this embodiment, thetransceiver 902 is used to receive and transmit data under the control of theprocessor 903.

Where in fig. 9 the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors represented by theprocessor 903 and various circuits of the memory represented by thememory 901 are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. Thetransceiver 902 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. Theprocessor 903 is responsible for managing the bus architecture and general processing, and thememory 901 may store data used by theprocessor 903 in performing operations.

Theprocessor 903 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

The embodiment of the present invention further provides a transmission apparatus, as shown in fig. 10, including amemory 1001, atransceiver 1002, and a processor 1003:

amemory 1001 for storing a computer program; atransceiver 1002 for transceiving data under the control of theprocessor 1003; aprocessor 1003 for reading the computer program in thememory 1001 and executing the following operations:

slot-based repetition opportunities;

a repetition opportunity based on repetition type a;

a repetition opportunity based on repetition type B.

Optionally, the transmission apparatus may further include theprocessor 1003 configured to receive only the DMRS for demodulation only in at least one of the following manners in the unavailable repetition opportunity:

wherein A is a predefined or configured integer greater than 0.

Optionally, in the transmission apparatus, theprocessor 1003 is further configured to determine, in one of the following manners, a frequency domain resource for receiving the DMRS in the unavailable repetition opportunity:

Optionally, the transmission apparatus, wherein theprocessor 1003 is further configured to determine, in one of the following manners, a DMRS sequence for receiving a DMRS in the unavailable repetition opportunity:

Optionally, the transmission apparatus, wherein theprocessor 1003 is further configured to determine the precoding used by the DMRS sequence by using one of the following manners:

the precoding is consistent with a precoding manner used for channel transmission in each available repetition opportunity of the N repetition opportunities; wherein M and Q are integers less than N, respectively.

Optionally, the transmission apparatus, wherein theprocessor 1003 is further configured to:

Where, in fig. 10, the bus architecture may include any number of interconnected buses and bridges, one or more processors, represented byprocessor 1003, and various circuits, represented bymemory 1001, are linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. Thetransceiver 1002 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. Theprocessor 1003 is responsible for managing the bus architecture and general processing, and thememory 1001 may store data used by theprocessor 1003 when performing operations.

Theprocessor 1003 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

An embodiment of the present invention further provides a transmission apparatus, which is applied to a sending end, and as shown in fig. 11, the apparatus includes:

atransmitting unit 1101 configured to transmit, in a channel in which repetition transmission is configured, only a demodulation reference signal DMRS in an unavailable repetition opportunity if the unavailable repetition opportunity exists among N repetition opportunities;

slot-based repetition opportunities;

a repetition opportunity based on repetition type a;

a repetition opportunity based on repetition type B.

Optionally, in the transmission apparatus, in the unavailable repetition opportunity, thetransmitting unit 1101 transmits only the DMRS as the demodulation reference signal by at least one of:

and according to the symbol position of the available repetition opportunity in the N repetition opportunities for transmitting the DMRS, transmitting the DMRS on the available symbols in the symbol set corresponding to the unavailable repetition opportunity.

wherein A is a predefined or configured integer greater than 0.

Optionally, in the transmission apparatus, thetransmitting unit 1101 may transmit only the DMRS in the unavailable repetition opportunity, and include:

Optionally, in the transmission apparatus, thetransmitting unit 1101 is further configured to determine the frequency domain resource for transmitting the DMRS in the unavailable repetition opportunity by using one of the following manners:

Optionally, in the transmission apparatus, thetransmitting unit 1101 is further configured to determine the DMRS sequence for transmitting the DMRS in the unavailable repetition opportunity by using one of the following manners:

Optionally, in the transmission apparatus, the sendingunit 1101 determines a manner of transmitting a DMRS sequence of a DMRS in the unavailable repetition opportunity, and the method further includes:

Optionally, in the transmission apparatus, thetransmitting unit 1101 is further configured to determine the precoding used by the DMRS sequence by using one of the following manners:

the precoding is consistent with a precoding mode used for channel transmission in the first M and/or last Q continuous available repetition opportunities of the unavailable repetition opportunities;

Optionally, in the transmission apparatus, the sendingunit 1101 is further configured to:

An embodiment of the present invention further provides a transmission apparatus, which is applied to a receiving end, and as shown in fig. 12, the apparatus includes:

areceiving unit 1201 configured to, in a channel in which retransmission is configured, receive only a demodulation reference signal DMRS in an unavailable repetition opportunity if the unavailable repetition opportunity exists in N repetition opportunities;

slot-based repetition opportunities;

a repetition opportunity based on repetition type a;

a repetition opportunity based on repetition type B.

Optionally, in the transmission apparatus, in the unavailable repetition opportunity, the receivingunit 1201 receives only the DMRS, which is a demodulation reference signal, by at least one of:

wherein A is a predefined or configured integer greater than 0.

Optionally, in the transmission apparatus, the receivingunit 1201 receives only the DMRS for demodulation in the unavailable repetition opportunity, and includes:

Optionally, in the transmission apparatus, the receivingunit 1201 is further configured to determine, in one of the following manners, a frequency domain resource for receiving the DMRS in the unavailable repetition opportunity:

Optionally, in the transmission apparatus, the receivingunit 1201 is further configured to determine, in one of the following manners, a DMRS sequence for receiving a DMRS in the unavailable repetition opportunity:

Optionally, in the transmission apparatus, the receivingunit 1201 determines a manner of receiving the DMRS sequence of the DMRS in the unavailable repetition opportunity, and further includes:

Optionally, in the transmission apparatus, the receivingunit 1201 is further configured to determine the precoding used by the DMRS sequence by using one of the following manners:

Optionally, in the transmission apparatus, the receivingunit 1201 is further configured to:

and under the condition that the channel transmission is configured with frequency hopping transmission, determining that the DMRS is transmitted in a frequency hopping mode on the unavailable repeating opportunity.

It should be noted that the apparatus provided in the embodiment of the present invention can implement all the method steps implemented by the method embodiment, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are not repeated herein.

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A transmission method is applied to a sending end, and is characterized in that the method comprises the following steps:

2. The transmission method according to claim 1, wherein the channel configured for repeated transmission is an uplink channel or a downlink channel; and/or

3. The transmission method according to claim 1, wherein the N repetition opportunities are determined by one of:

slot-based repetition opportunities;

a repetition opportunity based on repetition type a;

a repetition opportunity based on repetition type B.

4. The transmission method according to claim 3, wherein the N repetition opportunities are slot-based repetition opportunities or are repetition opportunities based on repetition type A, and the N repetition opportunities are determined as unavailable repetition opportunities when at least one of the following conditions is satisfied:

5. The transmission method according to claim 4, wherein when configuring the repeatedly transmitted channel as an uplink channel, the unavailable transmission symbols comprise at least one of symbols configured by higher layer signaling as downlink, symbols occupied by synchronization signal and physical broadcast channel block SSB transmission, and symbols in an unavailable symbol pattern configured by higher layer signaling; and/or the presence of a gas in the gas,

6. The transmission method according to claim 5, wherein when the repeatedly transmitted channel is configured as a semi-static channel, the unavailable transmission symbol further includes a symbol indicated by a Slot Format Indicator (SFI) as flexible.

7. The transmission method according to claim 3, wherein in the unavailable repetition opportunity, only DMRS for demodulation is transmitted by at least one of:

transmitting a DMRS on all available symbols in a set of symbols to which the unavailable repetition opportunity corresponds;

8. The transmission method according to claim 3, wherein when N repetition opportunities are repetition opportunities based on repetition type B, if an actual repetition opportunity includes A symbols and the number of symbols allocated to each repetition opportunity is not A, the actual repetition opportunity is determined to be an unavailable repetition opportunity;

wherein A is a predefined or configured integer greater than 0.

9. The transmission method according to claim 8, wherein in the unavailable repetition opportunity, only a demodulation reference signal (DMRS) is transmitted, and the method comprises:

10. The transmission method according to any of claims 1 to 9, further comprising determining frequency domain resources for transmitting the DMRS in the unavailable repetition opportunity by one of:

11. The transmission method according to any one of claims 1 to 9, further comprising determining the DMRS sequence for transmitting the DMRS in the unavailable repetition opportunity by one of:

12. The transmission method according to claim 11, wherein determining the manner in which the DMRS sequences for the DMRS are transmitted in the unavailable repetition opportunity further comprises:

13. The transmission method according to any of claims 1 to 9, wherein the method further comprises determining the precoding used by the DMRS sequence in one of:

14. The transmission method according to claim 1, characterized in that the method further comprises:

15. The transmission method according to claim 1, characterized in that the method further comprises:

16. A transmission method applied to a receiving end is characterized by comprising the following steps:

17. The transmission method according to claim 16, wherein the channel configured for repeated transmission is an uplink channel or a downlink channel; and/or

18. The transmission method according to claim 16, wherein the N repetition opportunities are determined by one of:

a slot-based repetition opportunity;

a repeat opportunity based on repeat type A;

based on the repetition opportunity of repetition type B.

19. The transmission method according to claim 18, wherein the N repetition opportunities are slot-based repetition opportunities or are repetition opportunities based on repetition type a, and wherein an unavailable repetition opportunity is determined when a repetition opportunity of the N repetition opportunities satisfies at least one of the following conditions:

20. The transmission method according to claim 19, wherein when configuring the repeatedly transmitted channel as an uplink channel, the unavailable transmission symbols comprise at least one of symbols configured by higher layer signaling as downlink, symbols occupied by transmission of synchronization signals and physical broadcast channel blocks SSB, and symbols in an unavailable symbol pattern configured by higher layer signaling; and/or the presence of a gas in the atmosphere,

21. The transmission method according to claim 20, wherein when the repeatedly transmitted channel is configured as a semi-static channel, the unavailable transmission symbol further includes a symbol indicated by a Slot Format Indicator (SFI) as flexible.

22. The transmission method according to claim 18, wherein, in the unavailable repetition opportunity, only DMRS for demodulation is received by at least one of:

23. The transmission method according to claim 18, wherein when N repetition opportunities are repetition opportunities based on repetition type B, if an actual repetition opportunity includes a symbols and the number of symbols allocated to each repetition opportunity is not a, the actual repetition opportunity is determined to be an unavailable repetition opportunity;

wherein A is a predefined or configured integer greater than 0.

24. The transmission method according to claim 23, wherein receiving only a demodulation reference signal (DMRS) in the unavailable repetition opportunity comprises:

25. The transmission method according to any of claims 16 to 24, further comprising determining frequency domain resources for receiving the DMRS in the unavailable repetition opportunity by one of:

26. The transmission method according to any of claims 16 to 24, further comprising determining the DMRS sequence for receiving the DMRS in the unavailable repetition opportunity by one of:

27. The transmission method according to claim 26, wherein determining the manner in which the DMRS sequences for the DMRS are received in the unavailable repetition opportunity further comprises:

a fifth mode: if the DMRS sequences are the same as the DMRS sequences in one available repetition opportunity before the unavailable repetition opportunity or the available repetition opportunity after the unavailable repetition opportunity, and the DMRS sequences on different symbols are different, determining the DMRS sequence on one symbol as the DMRS sequence transmitted on each symbol for transmitting the DMRS in the unavailable repetition opportunity according to a preset rule or configuration; or

28. The transmission method according to any of claims 16 to 24, wherein the method further comprises determining the precoding used by the DMRS sequence by one of:

29. The transmission method according to claim 16, wherein the method further comprises:

30. The transmission method according to claim 16, wherein the method further comprises:

31. A transmission apparatus, comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following:

wherein, N is a pre-configured number of repeated transmission times, and N is an integer greater than 1.

32. The transmission apparatus according to claim 31, wherein the channel configured for repeated transmission is an uplink channel or a downlink channel; and/or

33. The transmission apparatus of claim 31, wherein the N repetition opportunities are determined by one of:

slot-based repetition opportunities;

a repeat opportunity based on repeat type A;

a repetition opportunity based on repetition type B.

34. The transmission apparatus according to claim 33, wherein the N repetition opportunities are slot-based repetition opportunities or are repetition opportunities based on repetition type a, and wherein an unavailable repetition opportunity is determined when a repetition opportunity of the N repetition opportunities satisfies at least one of the following conditions:

and in the symbol set corresponding to the repeated opportunity, the number of the symbols is less than that of the transmission symbols corresponding to the channel.

35. The transmission apparatus according to claim 34, wherein when configuring the repeatedly transmitted channel as an uplink channel, the unavailable transmission symbols comprise at least one of symbols configured by higher layer signaling as downlink, symbols occupied by transmission of synchronization signals and physical broadcast channel blocks SSB, and symbols in an unavailable symbol pattern configured by higher layer signaling; and/or the presence of a gas in the gas,

36. The transmission apparatus of claim 35, wherein the unavailable transmission symbols further comprise a flexible symbol indicated by a Slot Format Indicator (SFI) when the repeatedly transmitted channel is configured to be a semi-static channel.

37. The transmission method according to claim 33, wherein in the unavailable repetition opportunity, the processor transmits only DMRS as demodulation reference signals by at least one of:

38. The transmission apparatus of claim 33, wherein when N repetition opportunities are repetition opportunities based on repetition type B, if an actual repetition opportunity comprises a symbols and the number of symbols allocated to each repetition opportunity is not a, the actual repetition opportunity is determined to be an unavailable repetition opportunity;

wherein A is a predefined or configured integer greater than 0.

39. The transmission apparatus of claim 38, wherein the processor transmits only a demodulation reference signal (DMRS) in the unavailable repetition opportunity, comprising:

40. The transmission apparatus according to any of claims 31 through 39, wherein the processor is further configured to determine the frequency domain resources for transmitting the DMRS in the unavailable repetition opportunity by one of:

41. The transmission apparatus according to any of claims 31 to 39, wherein the processor is further configured to determine the DMRS sequence for transmission of the DMRS in the unavailable repetition opportunity by one of:

42. The transmission apparatus of claim 41, wherein the processor determines a manner in which the DMRS sequences for the DMRS are transmitted in the unavailable repetition opportunity, further comprising:

43. The transmission apparatus according to any of claims 31 to 39, wherein the processor is further configured to determine the precoding used by the DMRS sequence by one of:

44. The transmission apparatus of claim 31, wherein the processor is further configured to:

45. The transmission apparatus of claim 31, wherein the processor is further configured to:

46. A transmission apparatus, comprising a memory, a transceiver, a processor:

47. The transmission apparatus according to claim 46, wherein the channel configured for repeated transmission is an uplink channel or a downlink channel; and/or

48. The transmission apparatus of claim 46, wherein the N repetition opportunities are determined by one of:

slot-based repetition opportunities;

a repetition opportunity based on repetition type a;

a repetition opportunity based on repetition type B.

49. The transmission apparatus according to claim 48, wherein the N repetition opportunities are slot-based repetition opportunities or are repetition opportunities based on repetition type A, and wherein an unavailable repetition opportunity is determined when a repetition opportunity of the N repetition opportunities satisfies at least one of the following conditions:

50. The transmission apparatus according to claim 49, wherein when configuring the repeatedly transmitted channel as an uplink channel, the unavailable transmission symbols comprise at least one of symbols configured by higher layer signaling as downlink, symbols occupied by synchronization signal and physical broadcast channel block (SSB) transmission, and symbols in an unavailable symbol pattern configured by higher layer signaling; and/or the presence of a gas in the gas,

51. The transmission apparatus of claim 50, wherein the unavailable transmission symbols further comprise a flexible symbol indicated by a Slot Format Indicator (SFI) when the repeatedly transmitted channel is configured to be a semi-static channel.

52. The transmission apparatus of claim 48, wherein in the unavailable repetition opportunity, the processor receives only demodulation reference signals (DMRS) by at least one of:

53. The transmission apparatus of claim 48, wherein when N repetition opportunities are repetition opportunities based on repetition type B, if an actual repetition opportunity comprises A symbols and the number of symbols allocated to each repetition opportunity is not A, the actual repetition opportunity is determined to be an unavailable repetition opportunity;

wherein A is a predefined or configured integer greater than 0.

54. The transmission apparatus according to claim 53, wherein receiving only a demodulation reference signal (DMRS) in the unavailable repetition opportunity comprises:

55. The transmission apparatus according to any one of claims 46 to 54, wherein the processor is further configured to determine the frequency domain resources for receiving the DMRS in the unavailable repetition opportunity by one of:

56. The transmission apparatus according to any one of claims 46 to 54, wherein the processor is further configured to determine the DMRS sequence for the reception of the DMRS in the unavailable repetition opportunity by one of:

57. The transmission apparatus of claim 56, wherein the processor determines a manner of receiving DMRS sequences for DMRS in the unavailable repetition opportunity, further comprising:

58. The transmission apparatus according to any one of claims 46 to 54, wherein the processor is further configured to determine the precoding used by the DMRS sequence by one of:

59. The transmission apparatus of claim 46, wherein the processor is further configured to:

60. The transmission apparatus of claim 46, wherein the processor is further configured to:

61. A transmission device applied to a transmitting end, the device comprising:

62. A transmission apparatus applied to a receiving end, the apparatus comprising:

a reception unit configured to receive only a demodulation reference signal (DMRS) in an unavailable repetition opportunity if the unavailable repetition opportunity exists in N repetition opportunities in a channel in which a repetition transmission is configured;

63. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to execute the transmission method of any one of claims 1 to 15 or the transmission method of any one of claims 16 to 30.