Physical uplink shared channel signal transmission method, base station, and communication system

Abstract

The present disclosure provides a physical uplink shared channel signal transmission method, a base station and a communication system, and relates to the technical field of wireless communication. The physical uplink shared channel signal transmission method provided by the present disclosure comprises: in the transmission configuration of a PUSCH, a base station selects part of time slots or part of PUSCH transmission to carry DMRS, and determines the position of the DMRS; wherein the time slots include uplink time slots and special time slots. Through such a method, the terminal can be configured to reduce the time slots occupied by DMRS in the PUSCH transmission, thereby releasing more time slots and physical resources for information transmission, and improving the coverage performance of the PUSCH.

Description

Technical Field

[0001] This disclosure relates to the field of mobile communication technology, and in particular to a physical uplink shared channel signal transmission method, base station, and communication system. Background Technology

[0002] In the 5G standard, the repeated transmission of PUCCH (Physical Uplink Control Channel) / PUSCH (Physical Uplink Shared Channel) includes the following methods:

[0003] (1) Repetition type A based on time slots

[0004] ■NR Rel-15 introduces PUCCH / PUSCH retransmission technology, supporting up to 8 retransmissions of uplink PUCCH and PUSCH, with the number of retransmissions configured using RRC (Radio Resource Control).

[0005] ■NR Rel-16 introduces DCI (Downlink Control Information) to dynamically indicate the number of PUSCH retransmissions, supporting up to 16 retransmissions.

[0006] ■Special slot (special time slot) uplink symbols are not used for PUSCH transmission.

[0007] (2) Repetition type B based on micro-timeslots

[0008] ■NR Rel-16 introduces PUSCH repetition type B, where DCI indicates the number of nominal repetitions. When encountering DL (DownLink) symbols or time slot boundaries, a single nominal repetition is divided into multiple actual repetitions, and each actual repetition requires a DMRS (Demodulation Reference Signal).

[0009] ■The uplink symbol in the special slot can be used for PUSCH transmission. Summary of the Invention

[0010] One objective of this disclosure is to improve PUSCH coverage performance.

[0011] According to one aspect of some embodiments of this disclosure, a PUSCH signal transmission method is proposed, comprising: a base station selecting some time slots or some PUSCH transmissions to carry DMRS in a PUSCH transmission configuration, and determining the location of DMRS; wherein the time slots include uplink time slots and special time slots.

[0012] In some embodiments, the PUSCH signal transmission method further includes: the base station performing joint channel estimation based on the determined location of the DMRS.

[0013] In some embodiments, the PUSCH signal transmission method further includes: generating indication information including the location of the DMRS; and sending the indication information to a terminal so that the terminal can perform PUSCH transmission according to the indication information.

[0014] In some embodiments, when selecting a portion of time slots to carry the DMRS, determining the location of the DMRS includes: selecting a portion of time slots from all time slots, including special time slots, to carry the DMRS; and determining the location of the DMRS in the selected time slots.

[0015] In some embodiments, determining the location of the DMRS further includes: determining whether the selected time slot includes a special time slot; and if it includes a special time slot, determining the location of the DMRS in the special time slot.

[0016] In some embodiments, the PUSCH signal transmission method further includes performing joint channel estimation based on DMRS located in multiple time slots.

[0017] In some embodiments, determining the location of the DMRS includes: when selecting a portion of the PUSCH transmissions to carry the DMRS, determining the location of the DMRS includes: selecting a portion of the PUSCH transmissions to carry the DMRS; and determining the location of the DMRS in each of the selected PUSCH transmissions.

[0018] In some embodiments, the PUSCH signal transmission method further includes performing joint channel estimation based on DMRS located in a plurality of PUSCHs.

[0019] In some embodiments, the PUSCH signal transmission method further includes: the base station determining the PUSCH repetition transmission type to be used, the PUSCH repetition transmission type including a first type and a second type; when the PUSCH repetition transmission type is the first type, selecting a portion of the time slots to carry DMRS; when the PUSCH repetition transmission type is the second type, selecting a portion of the PUSCH transmissions to carry DMRS.

[0020] In some embodiments, the PUSCH signal transmission method further includes: the base station determining the density of DMRS; determining the location of DMRS includes: selecting a portion of time slots or PUSCH transmissions to carry DMRS according to the density of DMRS, so that the time slots or PUSCH transmissions carrying DMRS conform to the density.

[0021] This method allows the terminal to reduce the time slots occupied by DMRS during PUSCH transmission, thereby freeing up more time slots and physical resources for information transmission and improving the coverage performance of PUSCH.

[0022] According to one aspect of some embodiments of the present disclosure, a base station is provided, comprising: a location determination unit configured to select a portion of time slots or a portion of PUSCH transmissions carrying DMRS in a PUSCH transmission configuration, and determine the location of DMRS; wherein the time slots include uplink time slots and special time slots.

[0023] In some embodiments, the base station further includes a channel estimation unit configured to perform joint channel estimation based on the determined location of the DMRS.

[0024] In some embodiments, the base station further includes: an indication information generation unit configured to generate indication information including the location of the DMRS; and a transmission unit configured to send the indication information to a terminal so that the terminal can perform PUSCH transmission based on the indication information.

[0025] In some embodiments, the channel estimation unit is configured to perform at least one of the following: perform joint channel estimation based on DMRS located in multiple time slots; or perform joint channel estimation based on DMRS located in multiple PUSCHs.

[0026] In some embodiments, the base station further includes: a transmission type determination unit configured to determine the PUSCH repetition transmission type to be used, the PUSCH repetition transmission type including a first type and a second type; and a location determination unit configured to: select a portion of time slots to carry DMRS when the PUSCH repetition transmission type is the first type; and select a portion of PUSCH transmissions to carry DMRS when the PUSCH repetition transmission type is the second type.

[0027] In some embodiments, the base station further includes: a density determination unit configured to determine the density of DMRS; and a location determination unit configured to select a portion of the time slots or PUSCH transmissions carrying DMRS based on the density of DMRS, so that the time slots or PUSCH transmissions carrying DMRS conform to the density.

[0028] According to one aspect of some embodiments of this disclosure, a base station is provided, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute any of the PUSCH signal transmission methods described above based on instructions stored in the memory.

[0029] Such base stations can be configured to reduce the time slots occupied by DMRS in PUSCH transmission, thereby freeing up more time slots and physical resources for information transmission and improving the coverage performance of PUSCH.

[0030] According to one aspect of some embodiments of the present disclosure, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement the steps of any of the PUSCH signal transmission methods described above.

[0031] By executing instructions on such storage media, the terminal can be configured to reduce the time slots occupied by DMRS during PUSCH transmission, thereby freeing up more time slots and physical resources for information transmission and improving the coverage performance of PUSCH.

[0032] According to one aspect of some embodiments of this disclosure, a communication system is proposed, comprising: any of the base stations described above; and a terminal configured to generate and transmit an uplink signal using a DMRS location configuration matching the PUSCH transmission configuration of the base station.

[0033] In such a communication system, the base station can configure the terminal to reduce the time slots occupied by DMRS in PUSCH transmission. The terminal can use the time slots that do not need to transmit DMRS and the resources released by PUSCH for information transmission, thereby improving the coverage performance of PUSCH. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this disclosure, illustrate exemplary embodiments of the present disclosure and are used to explain the disclosure, but do not constitute an undue limitation of the disclosure. In the drawings:

[0035] Figure 1 Flowcharts showing some embodiments of the PUSCH signal transmission method of this disclosure.

[0036] Figure 2A Flowcharts showing some other embodiments of the PUSCH signal transmission method of this disclosure.

[0037] Figure 2B This is a flowchart of some further embodiments of the PUSCH signal transmission method of this disclosure.

[0038] Figure 3A , 3B This is a schematic diagram of the relevant technology.

[0039] Figure 4A , 4B This is a schematic diagram of the PUSCH signal transmission method disclosed herein.

[0040] Figure 5 This is a schematic diagram of some embodiments of the base station disclosed herein.

[0041] Figure 6 These are schematic diagrams of other embodiments of the base station disclosed herein.

[0042] Figure 7 This is a schematic diagram of some further embodiments of the base station of this disclosure.

[0043] Figure 8 These are schematic diagrams illustrating some embodiments of the communication system disclosed herein. Detailed Implementation

[0044] The technical solutions of this disclosure will be further described in detail below with reference to the accompanying drawings and embodiments.

[0045] Flowcharts of some embodiments of the PUSCH signal transmission method disclosed herein are as follows: Figure 1 As shown.

[0046] In step 101, during the PUSCH transmission configuration process, the base station selects a portion of time slots or a portion of PUSCH transmissions to carry DMRS and determines the location of the DMRS. The candidate time slots include special time slots and uplink time slots for transmitting uplink data, thus allowing the selection of special time slots to carry DMRS. The selected time slots or PUSCHs only constitute a portion of the total time slots or PUSCH transmissions, not all of them.

[0047] In some embodiments, the terminal may use a default mode selection method. When the base station switches to a mode that uses a portion of the time slots or a portion of the PUSCH to transmit DMRS as described above, the uplink signal sent by the terminal using the corresponding mode is parsed.

[0048] This method allows the terminal to reduce the time slots occupied by DMRS during PUSCH transmission, thereby freeing up more time slots and physical resources for information transmission and improving the coverage performance of PUSCH.

[0049] In some embodiments, the base station can send the corresponding configuration information to the terminal, such as... Figure 1 As shown, the PUSCH signal transmission method of this disclosure may further include steps 102 to 106.

[0050] In step 102, the base station generates indication information including the location of the DMRS. In some embodiments, a bit-map can be used to identify, store, and transmit the location of the DMRS, thereby reducing storage space and transmission burden.

[0051] In step 103, the instruction information is sent to the terminal. After receiving the instruction information, the terminal performs PUSCH transmission according to the instruction information. In some embodiments, the instruction information can be conveyed to the user by sending a DCI.

[0052] In step 104, after receiving the uplink signal from the terminal, the base station performs joint channel estimation on the uplink signal based on the location of the DMRS determined in step 101 above.

[0053] This method allows the terminal to reduce the time slots occupied by DMRS in PUSCH transmission, and then use joint channel estimation to compensate for the reduction of DMRS, thereby freeing up more time slots and physical resources for information transmission and improving the coverage performance of PUSCH.

[0054] In some embodiments, the base station may first determine the required density of DMRS, and then determine the location of DMRS that meet that density.

[0055] In some embodiments, the base station can determine the density of DMRS based on the effect of joint channel estimation. If the communication quality of the joint channel estimation is greater than a predetermined value, the density of DMRS can be reduced; otherwise, the density of DMRS can be increased. In other embodiments, the density of DMRS can be obtained based on higher-layer configuration. This method enables optimization of communication quality while improving PUSCH coverage.

[0056] In some embodiments, the PUSCH transmission technology used by the base station can be either repetitiontype A (referred to as the first type herein) or repetitiontype B (referred to as the second type herein). In some embodiments, the base station can be capable of supporting both repetition transmission technologies, selecting one based on higher-layer signaling. The base station can be configured to use the same repetition transmission type for each terminal, or it can select different repetition transmission types based on the capabilities of different terminals. This approach improves the compatibility of the base station.

[0057] In related technologies, when repetition type A retransmission technology is used, the PUSCH can carry DMRS as follows: Figure 3AAs shown in the diagram, the upper part of the figure illustrates the symbols included in special time slots and uplink time slots, respectively; in the lower part of the figure, the dashed lines indicate symbols carrying DMRS. Special time slots cannot transmit PUSCH, therefore symbols located in special time slots do not carry DMRS signals, as indicated by the crosses in the figure. DMRS is carried by uplink time slots, and each uplink time slot contains DMRS.

[0058] Flowcharts of other embodiments of the PUSCH signal transmission method disclosed herein are as follows: Figure 2A As shown.

[0059] In step 201, the base station adopts the first type, namely repetition type A.

[0060] In step 202, determining the location of the DMRS includes determining the time slot in which the DMRS is located, such that some time slots are free of the DMRS, for example, as Figure 4A As shown, the first uplink slot does not carry DMRS.

[0061] In some embodiments, the special timeslot is within the range of selectable timeslots for DMRS transmission.

[0062] In some embodiments, the base station may first determine the required DMRS density, and then select the DMRS time slot in the designated terminal PUSCH transmission according to the density.

[0063] In step 203, it is determined whether the determined time slots include special time slots. If they include special time slots, step 204 is executed; otherwise, step 205 is executed.

[0064] In step 204, the location of the DMRS in a specific time slot is determined. In some embodiments, a location not yet occupied in the relevant art can be selected to carry the DMRS. In some embodiments, such as Figure 4A As shown, DMRS is carried in special time slots.

[0065] In step 205, indication information including the location of the DMRS is generated. In some embodiments, the location of the DMRS in the uplink time slot can be determined based on existing methods for repetition type A.

[0066] In step 206, the instruction information is sent to the terminal so that the terminal can perform PUSCH transmission according to the instruction information.

[0067] In step 207, joint channel estimation is performed based on the DMRS located in multiple time slots, such as... Figure 4A As shown in the image.

[0068] This method reduces the uplink time slot resource occupation of DMRS, improves the uplink channel resource utilization, and enhances the coverage performance of PUSCH. It also enables the transmission of DMRS using idle special time slot resources, thus improving the utilization of special time slot resources. Furthermore, the joint channel estimation method avoids the channel estimation difficulties and poor quality issues caused by the reduction of DMRS, ensuring the quality of information transmission.

[0069] In related technologies, when repetition type B retransmission technology is used, the PUSCH can carry DMRS as follows: Figure 3B As shown in the diagram, the top image illustrates the symbols for special time slots and uplink time slots; the middle image is a schematic diagram of Nominal Repetition, indicating 4 repetitions; and the bottom image is a schematic diagram of Actual Repetition, indicating 5 repetitions. In the Actual Repetition schematic diagram, the dashed lines represent symbols carrying DMRS, indicating that DMRS is required for all 5 transmissions.

[0070] Flowcharts of some further embodiments of the PUSCH signal transmission method disclosed herein are as follows: Figure 2B As shown.

[0071] In step 211, the base station adopts the second type, namely repetition type B.

[0072] In step 212, the PUSCH where the DMRS is located is determined, wherein the DMRS is not present in some PUSCHs, such as... Figure 4B As shown, DMRS is not present in the second and fourth PUSCH.

[0073] In some embodiments, PUSCH transmissions may occupy special time slots, and DMRS in PUSCH transmissions may occupy the symbol space of special time slots.

[0074] In step 213, indication information including the location of the DMRS is generated. In some embodiments, for a selected PUSCH carrying the DMRS, the location of the DMRS in the PUSCH can be determined based on related technologies, such as the current repetition type B method.

[0075] In step 214, indication information is sent to the terminal so that the terminal can perform PUSCH transmission according to the indication information. In some embodiments, the indication information can be sent to the terminal via DCI.

[0076] In step 215, joint channel estimation is performed based on the DMRS located in multiple PUSCHs, such as... Figure 4B As shown.

[0077] This method reduces the symbol space occupied by DMRS in PUSCH transmission, decreases the uplink time slot resource occupation of DMRS, improves uplink channel resource utilization, and enhances PUSCH coverage performance. By using joint channel estimation, it avoids the channel estimation difficulties and poor quality caused by the reduction of DMRS, thus ensuring the quality of information transmission.

[0078] Schematic diagrams of some embodiments of the base station 500 disclosed herein are shown below. Figure 5 As shown.

[0079] The location determination unit 501 can select a portion of time slots or a portion of PUSCH transmission to carry DMRS during the PUSCH transmission configuration process, and determine the location of the DMRS. The candidate time slots include special time slots and uplink time slots for transmitting uplink data, thus allowing the selection of special time slots to carry DMRS.

[0080] Such base stations can be configured to reduce the time slots occupied by DMRS in PUSCH transmission, thereby freeing up more time slots and physical resources for information transmission and improving the coverage performance of PUSCH.

[0081] In some embodiments, such as Figure 5 As shown, the base station 500 may also include a channel estimation unit 504, which can obtain the DMRS according to the determined DMRS, perform channel estimation according to the DMRS, thereby realizing the parsing of the uplink signal using the corresponding mode and completing the uplink communication process.

[0082] In some embodiments, such as Figure 5 As shown, the base station 500 may also include an indication information generation unit 502 and a transmission unit 503.

[0083] The indication information generation unit 502 is capable of generating indication information including the location of the DMRS.

[0084] The sending unit 503 can send indication information to the terminal. After receiving the indication information, the terminal performs PUSCH transmission according to the indication information. In some embodiments, the indication information can be conveyed to the user by sending DCI.

[0085] After receiving the uplink signal from the terminal, the channel estimation unit 504 can perform joint channel estimation based on the DMRS position determined in step 101 above.

[0086] Such a base station can be configured to reduce the time slots occupied by DMRS in PUSCH transmission, and then use joint channel estimation to make up for the reduction of DMRS, thereby freeing up more time slots and physical resources for information transmission and improving the coverage performance of PUSCH.

[0087] In some embodiments, such as Figure 5 As shown, the base station may further include a transmission type determination unit 505, capable of determining the repetition transmission technology type adopted by the base station. In some embodiments, the PUSCH repetition transmission technology adopted by the base station may be repetition type A (referred to herein as the first type) or repetition type B (referred to herein as the second type). In some embodiments, the base station may be capable of supporting two repetition transmission technologies, selecting according to higher-layer signaling. The base station may be configured to use the same repetition transmission type for each terminal, or it may select different repetition transmission types according to the different capabilities of the terminals, thereby improving the compatibility of the base station.

[0088] In some embodiments, if the transmission type determination unit 505 determines that the first type is used, the location determination unit 501 can first determine the time slot where the DMRS is located, wherein some time slots do not contain the DMRS. In some embodiments, the special time slot is within the range of selectable time slots for DMRS transmission. In some embodiments, if the time slot where the DMRS is located includes the special time slot, it is also necessary to further determine the location of the DMRS in the special time slot. In some embodiments, a location that is not yet occupied in the related art can be selected to carry the DMRS.

[0089] Such a base station can reduce the uplink time slot resource occupation of DMRS, improve the uplink channel resource utilization, and improve the coverage performance of PUSCH; it can utilize idle special time slot resources to transmit DMRS, improving the utilization of special time slot resources; and by using joint channel estimation, it avoids the channel estimation difficulties and poor quality problems caused by the reduction of DMRS, thus ensuring the quality of information transmission.

[0090] In some embodiments, if the transmission type determination unit 505 determines that the second type is used, the location determination unit 501 can determine the PUSCH where the DMRS is located, wherein some PUSCHs do not contain DMRS. In some embodiments, PUSCH transmission may occupy a special time slot, and the DMRS in the PUSCH transmission may occupy the symbol space of the special time slot.

[0091] Such a base station can reduce the symbol space occupied by DMRS in PUSCH retransmission, reduce the occupation of uplink time slot resources by DMRS, improve the utilization of uplink channel resources, and improve the coverage performance of PUSCH. By using joint channel estimation, it avoids the problems of channel estimation difficulties and poor quality caused by the reduction of DMRS, thus ensuring the quality of information transmission.

[0092] In some embodiments, such as Figure 5 As shown, the base station may further include a density determination unit 506, capable of first determining the required density of DMRS, and then determining the locations of DMRS that meet that density. In some embodiments, the density determination unit 506 can determine the density of DMRS based on the effect of joint channel estimation. If the communication quality of the joint channel estimation is greater than a predetermined value, the density of DMRS can be reduced; otherwise, the density of DMRS can be increased. In other embodiments, the density of DMRS can be obtained based on higher-layer configuration.

[0093] Such base stations can adaptively adjust the density of DMRS, reducing the resources occupied by DMRS while ensuring that the density of DMRS meets communication quality requirements as much as possible.

[0094] A schematic diagram of the structure of an embodiment of the base station disclosed herein is shown below. Figure 6 As shown, the base station includes a memory 601 and a processor 602. The memory 601 can be a disk, flash memory, or any other non-volatile storage medium. The memory stores instructions in the corresponding embodiment of the PUSCH signal transmission method described above. The processor 602 is coupled to the memory 601 and can be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 602 executes the instructions stored in the memory, freeing up more time slots and physical resources for information transmission, thus improving the coverage performance of the PUSCH.

[0095] In one embodiment, it can also be as follows: Figure 7 As shown, base station 700 includes memory 701 and processor 702. Processor 702 is coupled to memory 701 via BUS bus 703. Base station 700 can also be connected to external storage device 705 via storage interface 704 to access external data, and can also be connected to a network or another computer system (not shown) via network interface 706. Further details are omitted here.

[0096] In this embodiment, by storing data instructions in the memory and then processing the instructions by the processor, more time slots and physical resources can be freed up for information transmission, thereby improving the coverage performance of the PUSCH.

[0097] In another embodiment, a computer-readable storage medium stores computer program instructions that, when executed by a processor, implement the steps of the method in the corresponding embodiment of the PUSCH signal transmission method. Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, apparatus, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0098] Schematic diagrams of some embodiments of the communication system 800 disclosed herein are shown below. Figure 8 As shown.

[0099] Base station 81 can be any of the types mentioned above.

[0100] Terminal 82 can generate and transmit uplink signals using a DMRS location configuration that matches the base station's PUSCH transmission configuration. In some embodiments, the terminal can use a default mode selection method. When the base station switches to a mode that carries DMRS using a portion of the time slots or a portion of the PUSCH transmission as described above, the terminal can parse the uplink signals transmitted by the terminal using the corresponding mode.

[0101] In such a communication system, the base station can configure the terminal to reduce the time slots occupied by DMRS in PUSCH transmission. The terminal can use the time slots that do not need to transmit DMRS and the resources released by PUSCH for information transmission, thereby improving the coverage performance of PUSCH.

[0102] In some embodiments, base station 81 may send the location indication of the generated DMRS to terminal 82, and terminal performs PUSCH transmission based on the location of the DMRS in the indication information from base station. In some embodiments, terminal 82 may receive DCI from base station, and if the DCI includes information about PUSCH transmission, obtain indication information and determine the location occupied by DMRS in PUSCH transmission based on the indication information.

[0103] In such a communication system, the base station can configure the terminal to reduce the time slots occupied by DMRS in PUSCH transmission. The terminal can use the time slots that do not require DMRS transmission and the resources released by PUSCH for information transmission. The base station uses joint channel estimation in uplink signal analysis to compensate for the reduction of DMRS, thereby improving the coverage performance of PUSCH.

[0104] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0105] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0106] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0107] This concludes the detailed description of the present disclosure. To avoid obscuring the concept of the disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0108] The methods and apparatus of this disclosure may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of this disclosure are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, this disclosure may also be implemented as a program recorded on a recording medium, the program including machine-readable instructions for implementing the methods according to this disclosure. Thus, this disclosure also covers recording media storing programs for performing the methods according to this disclosure.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and not to limit them; although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this disclosure or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this disclosure.

Claims

1. A method for transmitting physical uplink shared channel signals, comprising: In the transmission configuration of the Physical Uplink Shared Channel (PUSCH), the base station selects a portion of the PUSCH transmissions from multiple PUSCH repetitions to carry the Demodulation Reference Signal (DMRS). The time slots of these multiple PUSCH repetitions include multiple uplink time slots. The location of the DMRS within these multiple uplink time slots is determined. Also includes: The base station determines the density of PUSCH transmissions carrying the DMRS. The determination of the location of the DMRS includes: selecting a portion of the PUSCH transmissions in multiple repeated PUSCH transmissions to carry the DMRS based on the density of the PUSCH transmissions carrying the DMRS, so that the PUSCH transmissions carrying the DMRS conform to the density. The base station performs joint channel estimation based on the determined location of the DMRS; If the communication quality estimated by the joint channel is greater than a predetermined value, the density is reduced; if the communication quality estimated by the joint channel is less than or equal to the predetermined value, the density is increased.

2. The method according to claim 1, further comprising: Generate indication information including the location of the DMRS; The instruction information is sent to the terminal so that the terminal can perform PUSCH transmission according to the instruction information.

3. The method according to claim 1, wherein, Selecting a portion of the PUSCH transmissions in multiple repeated PUSCH transmissions to carry the demodulation reference signal DMRS includes: Among all time slots, including special time slots, select special time slots and a portion of time slots from multiple PUSCH repetitions to carry the DMRS.

4. The method according to claim 3, further comprising: Determine whether the selected time slot includes a special time slot; In cases involving special time slots, the position of the DMRS within those special time slots is determined.

5. The method according to claim 3 or 4, further comprising: Joint channel estimation is performed based on DMRS located in multiple time slots.

6. The method according to claim 1, wherein, Selecting a portion of the PUSCH transmissions in multiple repeated PUSCH transmissions to carry the demodulation reference signal DMRS, the step of determining the position of the DMRS in the multiple uplink time slots includes: In multiple repeated PUSCH transmissions, a portion of the PUSCH transmissions are selected to carry the DMRS; Determine the position of DMRS in each selected PUSCH transmission.

7. The method according to claim 6, further comprising: Joint channel estimation is performed based on DMRS located in multiple PUSCHs.

8. The method according to claim 1, further comprising: The base station determines the PUSCH repetition transmission type to be used, and the PUSCH repetition transmission type includes a first type and a second type. When the PUSCH retransmission type is the first type, select special time slots and part time slots of part PUSCH retransmissions in multiple PUSCH retransmissions to carry DMRS; When the PUSCH retransmission type is the second type, select a portion of the PUSCH retransmissions from multiple PUSCH retransmissions to carry DMRS.

9. A base station, comprising: The location determination unit is configured to select a portion of the PUSCH transmissions carrying demodulation reference signals (DMRS) in the transmission configuration of the physical uplink shared channel (PUSCH), wherein the time slots of the multiple PUSCH repetition transmissions include multiple uplink time slots, and determine the location of the DMRS in the multiple uplink time slots. The channel estimation unit is configured to perform joint channel estimation based on the determined location of the DMRS; A density determination unit is configured to determine the density of PUSCH transmission carrying the DMRS, decrease the density if the communication quality estimated by the joint channel is greater than a predetermined value, and increase the density if the communication quality estimated by the joint channel is less than or equal to the predetermined value. The location determination unit is configured to select a PUSCH transmission carrying DMRS from multiple repeated PUSCH transmissions based on the density of the PUSCH transmission carrying the DMRS, so that the PUSCH transmission carrying the DMRS conforms to the density.

10. The base station according to claim 9, further comprising: The indication information generation unit is configured to generate indication information including the location of the DMRS; The sending unit is configured to send the indication information to the terminal so that the terminal can perform PUSCH transmission according to the indication information.

11. The base station according to claim 10, wherein, The channel estimation unit is configured to perform at least one of the following: Perform joint channel estimation based on DMRS located in multiple time slots; or Joint channel estimation is performed based on DMRS located in multiple PUSCHs.

12. The base station according to claim 9, further comprising: The transmission type determination unit is configured to determine the PUSCH repeat transmission type to be used, wherein the PUSCH repeat transmission type includes a first type and a second type. The location determination unit is configured as follows: When the PUSCH retransmission type is the first type, select special time slots and part time slots of part PUSCH retransmissions in multiple PUSCH retransmissions to carry DMRS; When the PUSCH retransmission type is the second type, select a portion of the PUSCH retransmissions from multiple PUSCH retransmissions to carry DMRS.

13. A base station, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to perform the method as described in any one of claims 1 to 8 based on instructions stored in the memory.

14. A computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the method according to any one of claims 1 to 8.

15. A communication system, comprising: The base station as described in any one of claims 9 to 13; and The terminal is configured to generate and transmit an uplink signal using a DMRS location configuration that matches the PUSCH transmission configuration of the base station.

Images