Information transmission method and device

Abstract

A method and apparatus for information transmission are provided to jointly configure DMRS in multiple times of frequency hopping based repeated transmission to improve transmission performance. The method comprises: a network device determining first information and sending the first information to a terminal device; the first information is used to indicate the demodulation reference symbol (DMRS) resource configured in each of K times of repeated transmission; the terminal device performs the K times of repeated transmission according to the DMRS resource configured in each of the repeated transmission in the first information; wherein the DMRS resource configured in at least two of the K times of repeated transmission is different; wherein the configured DMRS resource indicates the time domain position of the DMRS in one time of repeated transmission. In this way, the DMRS resource can be flexibly configured in multiple times of repeated transmission, and the performance gain of channel joint estimation can be obtained to improve the transmission performance.

Description

[0001] This application claims priority to Chinese Patent Application No. 202010762089.0, filed on July 31, 2020, entitled "An Information Transmission Method and Apparatus", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to an information transmission method and apparatus. Background Technology

[0003] In wireless communication systems, such as new radio (NR) systems, information exchanged between terminal devices and access devices is carried through physical channels. Specifically, data transmitted by the terminal device, i.e., uplink data, is typically carried through the physical uplink shared channel (PUSCH); control information transmitted by the terminal device, i.e., uplink control information, is typically carried through the physical uplink control channel (PUCCH). Furthermore, the terminal device can also transmit a sounding reference signal (SRS). By receiving the SRS from the terminal device, the access device can estimate the channel quality of the terminal device at different frequencies.

[0004] In wireless communication, path loss for wireless signal propagation is severe in some deep coverage scenarios, such as cell edges or basements. In such cases, coverage enhancement measures need to be considered, which is particularly important for uplink transmission because the transmit power of terminal devices is often low, for example, 23dBm, far lower than the transmit power of access devices (e.g., a typical 20MHz bandwidth access device has a transmit power of 46dBm). One method to enhance coverage performance is to repeatedly transmit data, i.e., repeatedly send PUSCH data. For example, the terminal device repeatedly sends PUSCH data, and the access device combines and detects the repeatedly sent data, which can improve channel estimation performance, improve data demodulation performance, and thus improve cell coverage.

[0005] Furthermore, in scattering-rich environments, when there are many transmission paths and a large multipath delay spread, the coherence bandwidth of subcarriers in the frequency domain is small. Coherence bandwidth refers to a bandwidth within which channel fading is nearly uniform; that is, fading channels within the coherence bandwidth can be considered quasi-statically invariant fading channels. Therefore, when the coherence bandwidth is small, different carrier positions within the system bandwidth (outside the coherence bandwidth) may exhibit significantly different fading characteristics. Thus, if the access device can select better frequency domain positions for frequency-selective scheduling based on the fading characteristics of different carrier positions—that is, frequency hopping transmission—it helps reduce signal transmission loss caused by channel fading and improves uplink transmission capability.

[0006] Currently, NR supports frequency hopping for repeated transmissions. However, the configuration of the demodulation reference symbol (DMRS) for repeated transmissions based on frequency hopping is inflexible, resulting in poor transmission performance. Summary of the Invention

[0007] This application provides an information transmission method and apparatus for jointly configuring DMRS during multiple repetitive transmissions based on frequency hopping, so as to improve transmission performance.

[0008] In a first aspect, this application provides an information transmission method, which may include: a network device determining first information and sending the first information to a terminal device; the first information being used to indicate a demodulation reference symbol (DMRS) resource configured in each of K repeated transmissions; the DMRS resource configured in at least two of the K repeated transmissions being different; wherein the configured DMRS resource indicates the time-domain position of the DMRS in one repeated transmission; and K is an integer greater than or equal to 2.

[0009] The above method enables flexible configuration of DMRS resources for multiple repeated transmissions, thereby obtaining performance gains from joint channel estimation and improving transmission performance.

[0010] In one possible design, the network device sends second information to the terminal device, the second information indicating N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2. This allows the terminal device to perform repeated transmissions with frequency hopping based on the N frequency hopping positions.

[0011] In one possible design, the second information indicates a frequency hopping offset used to determine the N frequency hopping positions; wherein the frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K.

[0012] Using the above method, the terminal device can perform uniform frequency hopping and repeated transmission based on the N frequency hopping positions determined by the frequency hopping offset.

[0013] In one possible design, the second information indicates multiple frequency hopping offsets used to determine the N frequency hopping positions. This allows the terminal device to perform non-uniform frequency hopping repetitive transmissions based on the N frequency hopping positions determined by the multiple frequency hopping offsets.

[0014] In one possible design, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions. Here, H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

[0015] In one possible design, the K repeated transmissions comprise L groups of repeated transmissions. Each of the first L-1 groups of repeated transmissions in the K repeated transmissions contains N transmissions according to the N frequency hopping positions. The last group of repeated transmissions in the K repeated transmissions contains M transmissions according to the N frequency hopping positions, where M is less than or equal to N. L is an integer greater than or equal to 2 and less than or equal to K. The DMRS resources configured for the P-th repeated transmission are different from those configured for the P+1-th repeated transmission. P is an integer greater than 1 and less than L. The configured DMRS resources indicate one of the following: the time-domain position of the preceding DMRS in a repeated transmission; no DMRS in a repeated transmission; the time-domain position of the preceding DMRS in a repeated transmission; and the time-domain position of the additional DMRS in a repeated transmission. This allows for flexible configuration of different DMRS resources in adjacent groups, thereby achieving performance gains in joint channel estimation and improving transmission performance.

[0016] In one possible design, in the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the (P+1)th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource. This ensures that the DMRS resources configured for repeated transmissions within each group are the same, simplifying the configuration.

[0017] In one possible design, the K repeated transmissions comprise L groups of repeated transmissions. Each of the first L-1 groups of repeated transmissions in the K repeated transmissions contains N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions contains M transmissions according to the N frequency hopping positions, where M is less than or equal to N; L is an integer greater than or equal to 2 and less than or equal to K; at least one of the L groups of repeated transmissions uses at least two configurations of DMRS resources; the configured DMRS resources indicate one of the following: the time-domain position of the preceding DMRS in a repeated transmission; no DMRS in a repeated transmission; the time-domain position of the preceding DMRS in a repeated transmission; and the time-domain position of the additional DMRS in a repeated transmission. By configuring DMRS resources that are not entirely identical within a group of repeated transmissions, a performance gain in joint channel estimation can be obtained to improve transmission performance.

[0018] In one possible design, the DMRS resources configured for the Pth group of repetitive transmissions differ from those configured for the (P+1)th group of repetitive transmissions by specifying that the DMRS resources configured for repetitive transmissions at the first frequency domain position in the Pth group of repetitive transmissions differ from those configured for repetitive transmissions at the first frequency domain position in the (P+1)th group of repetitive transmissions. This ensures that the DMRS resources configured for repetitive transmissions at the same frequency domain position differ across two consecutive groups of repetitive transmissions, thereby achieving a performance gain from joint channel estimation and improving transmission performance.

[0019] In one possible design, at least one group of repeating transmissions in the L groups uses at least two different DMRS resource configurations, including: the DMRS resources configured for repeating transmissions at at least two different frequency domain locations in the at least one group of repeating transmissions are different. This allows for joint configuration of DMRS resources from repeating transmissions that differ in the frequency hopping domain dimension, thereby obtaining a performance gain from joint channel estimation and improving transmission performance.

[0020] In one possible design, each of the N frequency hopping positions corresponds to H consecutive repetitive transmissions, with at least two of these repetitive transmissions having different DMRS resource configurations; where H is an integer greater than or equal to 2, and K is greater than or equal to twice H. This allows for performance gains in joint channel estimation, thereby improving transmission performance.

[0021] Secondly, this application provides an information transmission method, which may include: a terminal device receiving first information from a network device, the first information indicating demodulation reference symbol (DMRS) resources configured in K repeated transmissions; the DMRS resources configured in at least two of the K repeated transmissions are different; wherein the configured DMRS resources indicate the time-domain position of the DMRS in one repeated transmission; the terminal device performing the K repeated transmissions according to the DMRS resources configured for each repeated transmission in the first information; K is an integer greater than or equal to 2.

[0022] In one possible design, the terminal device receives second information from the network device, the second information indicating N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2. Thus, the terminal device can perform repeated transmissions with frequency hopping based on the N frequency hopping positions.

[0023] In one possible design, the second information indicates a frequency hopping offset used to determine the N frequency hopping positions; wherein the frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K.

[0024] Using the above method, the terminal device can perform uniform frequency hopping and repeated transmission based on the N frequency hopping positions determined by the frequency hopping offset.

[0025] In one possible design, the second information indicates multiple frequency hopping offsets used to determine the N frequency hopping positions. This allows the terminal device to perform non-uniform frequency hopping repetitive transmissions based on the N frequency hopping positions determined by the multiple frequency hopping offsets.

[0026] In one possible design, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions. Here, H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

[0027] In one possible design, the K repeated transmissions comprise L groups of repeated transmissions. Each of the first L-1 groups of repeated transmissions in the K repeated transmissions contains N transmissions according to the N frequency hopping positions. The last group of repeated transmissions in the K repeated transmissions contains M transmissions according to the N frequency hopping positions, where M is less than or equal to N. L is an integer greater than or equal to 2 and less than or equal to K. The DMRS resources configured for the P-th repeated transmission are different from those configured for the P+1-th repeated transmission. P is an integer greater than 1 and less than L. The configured DMRS resources indicate one of the following: the time-domain position of the preceding DMRS in a repeated transmission; no DMRS in a repeated transmission; the time-domain position of the preceding DMRS in a repeated transmission; and the time-domain position of the additional DMRS in a repeated transmission. This allows for flexible configuration of different DMRS resources in adjacent groups, thereby achieving performance gains in joint channel estimation and improving transmission performance.

[0028] In one possible design, in the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the (P+1)th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource. This ensures that the DMRS resources configured for repeated transmissions within each group are the same, simplifying the configuration.

[0029] In one possible design, the K repeated transmissions comprise L groups of repeated transmissions. Each of the first L-1 groups of repeated transmissions in the K repeated transmissions contains N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions contains M transmissions according to the N frequency hopping positions, where M is less than or equal to N; L is an integer greater than or equal to 2 and less than or equal to K; at least one of the L groups of repeated transmissions uses at least two configurations of DMRS resources; the configured DMRS resources indicate one of the following: the time-domain position of the preceding DMRS in a repeated transmission; no DMRS in a repeated transmission; the time-domain position of the preceding DMRS in a repeated transmission; and the time-domain position of the additional DMRS in a repeated transmission. By configuring DMRS resources that are not entirely identical within a group of repeated transmissions, a performance gain in joint channel estimation can be obtained to improve transmission performance.

[0030] In one possible design, the DMRS resources configured for the Pth group of repetitive transmissions differ from those configured for the (P+1)th group of repetitive transmissions by specifying that the DMRS resources configured for repetitive transmissions at the first frequency domain position in the Pth group of repetitive transmissions differ from those configured for repetitive transmissions at the first frequency domain position in the (P+1)th group of repetitive transmissions. This ensures that the DMRS resources configured for repetitive transmissions at the same frequency domain position differ across two consecutive groups of repetitive transmissions, thereby achieving a performance gain from joint channel estimation and improving transmission performance.

[0031] In one possible design, at least one group of repeating transmissions in the L groups uses at least two different DMRS resource configurations, including: the DMRS resources configured for repeating transmissions at at least two different frequency domain locations in the at least one group of repeating transmissions are different. This allows for joint configuration of DMRS resources from repeating transmissions that differ in the frequency hopping domain dimension, thereby obtaining a performance gain from joint channel estimation and improving transmission performance.

[0032] In one possible design, each of the N frequency hopping positions corresponds to H consecutive repetitive transmissions, with at least two of these repetitive transmissions having different DMRS resource configurations; where H is an integer greater than or equal to 2, and K is greater than or equal to twice H. This allows for performance gains in joint channel estimation, thereby improving transmission performance.

[0033] Thirdly, this application also provides an information transmission device, which may be a network device having the functions of a network device implementing the first aspect or various possible design examples of the first aspect. The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0034] In one possible design, the structure of the information transmission device may include a transceiver unit and a processing unit. These units can perform the corresponding functions of the network device in the first aspect or various possible design examples of the first aspect, as detailed in the method examples, which will not be repeated here.

[0035] In one possible design, the information transmission device includes a transceiver and a processor, and optionally a memory. The transceiver is used for sending and receiving data, and for communicating and interacting with other devices in the communication system. The processor is configured to support the information transmission device in performing the corresponding functions of the network device described in the first aspect or various possible design examples of the first aspect. The memory is coupled to the processor and stores the necessary program instructions and data of the information transmission device.

[0036] Fourthly, this application also provides an information transmission device, which can be a terminal device. This information transmission device has the functions of a terminal device implementing the second aspect or various possible design examples of the second aspect. The functions can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0037] In one possible design, the structure of the information transmission device may include a transceiver unit and a processing unit. These units can perform the corresponding functions of the terminal device in the second aspect or various possible design examples of the second aspect, as detailed in the method examples, which will not be repeated here.

[0038] In one possible design, the information transmission device includes a transceiver and a processor, and optionally a memory. The transceiver is used for sending and receiving data, and for communicating and interacting with other devices in the communication system. The processor is configured to support the information transmission device in performing the corresponding functions of the terminal device in the second aspect or various possible design examples of the second aspect described above. The memory is coupled to the processor and stores the necessary program instructions and data of the information transmission device.

[0039] Fifthly, embodiments of this application provide a communication system that may include the network devices and terminal devices mentioned above.

[0040] Sixthly, embodiments of this application provide a computer-readable storage medium storing program instructions that, when executed on a computer, cause the computer to perform the methods of the first aspect and any possible design thereof, and the second aspect and any possible design thereof, of the embodiments of this application. Exemplarily, the computer-readable storage medium can be any available medium accessible to a computer. For example, but not limited to, a computer-readable medium may include a non-transient computer-readable medium, random-access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), CD-ROM or other optical disk storage, magnetic disk storage media, or other magnetic storage devices, or any other medium capable of carrying or storing desired program code having the form of instructions or data structures and accessible to a computer.

[0041] In a seventh aspect, embodiments of this application provide a computer program product including computer program code or instructions, which, when run on a computer, enables the computer to implement the first aspect and any possible design thereof, and the second aspect and any possible design thereof.

[0042] Eighthly, this application also provides a chip coupled to a memory for reading and executing program instructions stored in the memory to implement the methods of the first aspect and any possible design thereof, and the second aspect and any possible design thereof.

[0043] For the various aspects from the third to the eighth aspects mentioned above, and the technical effects that each aspect may achieve, please refer to the description of the technical effects that can be achieved by the various possible solutions for the first or second aspects mentioned above. They will not be repeated here. Attached Figure Description

[0044] Figure 1 A schematic diagram of the architecture of a communication system provided in this application;

[0045] Figure 2 This application provides a schematic diagram of time-domain resource allocation for repeated Type A PUSCH transmissions.

[0046] Figure 3 A schematic diagram of a Type B PUSCH repetitive transmission across slot boundaries provided for this application;

[0047] Figure 4 A schematic diagram of repeated transmission with frequency hopping within a slot provided in this application;

[0048] Figure 5 A schematic diagram of repeated transmission with frequency hopping between slots provided in this application;

[0049] Figure 6 A flowchart of an information transmission method provided in this application;

[0050] Figure 7 A schematic diagram of a frequency hopping method for repeated PUSCH transmission of Type A provided in this application;

[0051] Figure 8 A schematic diagram of another frequency hopping method for repeated PUSCH transmission of Type A provided in this application;

[0052] Figure 9 A schematic diagram of a frequency hopping method for repeated transmission of PUSCH in Type B provided in this application;

[0053] Figure 10 A schematic diagram of another frequency hopping method for repeated PUSCH transmission of Type B provided in this application;

[0054] Figure 11 A schematic diagram of a DMRS resource with frequency hopping-based repetitive transmission configuration for a Type A PUSCH provided in this application;

[0055] Figure 12 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0056] Figure 13 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0057] Figure 14 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0058] Figure 15 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0059] Figure 16 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0060] Figure 17 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0061] Figure 18 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0062] Figure 19 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0063] Figure 20 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0064] Figure 21 A schematic diagram of another DMRS resource with frequency hopping-based repetitive transmission configuration for Type A PUSCH provided in this application;

[0065] Figure 22 A schematic diagram of the structure of an information transmission device provided in this application;

[0066] Figure 23 A structural diagram of an information transmission device provided in this application;

[0067] Figure 24This is a schematic diagram of a frequency hopping method for repeated PUSCH transmission provided in this application. Detailed Implementation

[0068] The present application will now be described in further detail with reference to the accompanying drawings.

[0069] This application provides an information transmission method and apparatus to jointly configure DMRS during multiple repetitive transmissions based on frequency hopping, thereby improving transmission performance. The method and apparatus described in this application are based on the same technical concept. Since the principles by which the method and apparatus solve the problem are similar, their implementations can be mutually referenced, and repeated details will not be elaborated further.

[0070] In the description of this application, the terms "first," "second," etc., are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance or order.

[0071] In this application, "at least one" means one or more, and "multiple" means two or more.

[0072] To more clearly describe the technical solutions of the embodiments of this application, the information transmission method and apparatus provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0073] Figure 1 This application illustrates a possible communication system architecture to which the information transmission method provided in this embodiment is applicable. The communication system architecture includes network devices and terminal devices, wherein:

[0074] The network device is a device with wireless transceiver capabilities or a chip that can be configured in the network device. The network device may include, but is not limited to: access network equipment, base station (gNB), radio network controller (RNC), node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or homeNode B, HNB), baseband unit (BBU), access point (AP), wireless relay node, wireless backhaul node, transmission and reception point (TRP or transmission point, TP) in a wireless fidelity (WIFI) system, etc. It may also be a network node constituting a gNB or transmission point, such as a baseband unit (BBU) or a distributed unit (DU), etc.

[0075] In some deployments, a gNB may include a centralized unit (CU) and a DU. A gNB may also include a radio unit (RU). The CU implements some of the gNB's functions, and the DU implements others. For example, the CU implements radio resource control (RRC) and packet data convergence protocol (PDCP) layer functions, while the DU implements radio link control (RLC), media access control (MAC), and physical (PHY) layer functions. Since RRC layer information ultimately becomes PHY layer information, or is derived from PHY layer information, in this architecture, higher-layer signaling, such as RRC or PDCP layer signaling, can be considered to be sent by the DU, or by the DU+RU. It is understood that network devices can be CU nodes, DU nodes, or devices including both CU and DU nodes. Furthermore, the CU can be classified as a network device in the access network (RAN) or a network device in the core network (CN); this is not limited.

[0076] The terminal device can also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. In the embodiments of this application, the terminal device can be a mobile phone, tablet computer, computer with wireless transceiver capabilities, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical care, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. The embodiments of this application do not limit the application scenario. In this application, terminal devices with wireless transceiver capabilities and chips that can be configured in the aforementioned terminal devices are collectively referred to as terminal devices.

[0077] It should be noted that, Figure 1 The communication system shown can be, but is not limited to, a 5th generation (5G) system, such as NR. Optionally, the method of this application embodiment is also applicable to various future communication systems, such as 6G systems or other communication networks.

[0078] Below, to facilitate understanding of the embodiments of this application, we will first introduce the concepts and basic knowledge involved in the embodiments of this application.

[0079] The current NR protocol supports uplink retransmission, which means that terminal devices, such as UEs, repeatedly send data, and network devices, such as gNBs, receive and combine the repeatedly sent data to improve the signal-to-noise ratio of the received signal, effectively improve channel estimation capability and demodulation performance, thereby improving the coverage capability of the cell.

[0080] 1. Signaling configuration for repeated transmissions

[0081] For example, for uplink SRS, the current NR protocol supports retransmissions of {1, 2, 4} different numbers; for PUSCH transmission, the current NR protocol supports retransmissions of {1, 2, 4, 8} different numbers. Currently, the number of retransmissions for SRS and PUSCH is configured through radio resource control (RRC) signaling, for example:

[0082] PUSCH can be configured through the RRC fields (repK, repK-RV): ConfiguredGrantConfig::RepK={n1,n2,n4,n8}.

[0083] SRS can be configured through the RRC field (RepetitionFactor): SRS-Resource::RepetitionFactor = {n1, n2, n4}.

[0084] After the UE receives the above RRC signaling configuration, it will transmit the signal a corresponding number of times.

[0085] Typically, RRC also includes connection management, radio bearer control, and connection mobility processes. RRC signaling takes a considerable amount of time (e.g., hundreds of milliseconds) to travel from higher layers to the terminal, making it difficult to dynamically adapt to changes in the transmission channel. Therefore, the NR 38.214 protocol introduced downlink control information (DCI) to dynamically indicate the number of PUSCH retransmissions for PUSCH, flexibly matching the channel quality of the current PUSCH transmission. Specifically, the number of retransmissions is determined by an index in the time domain resource allocation (TDRA) table within the DCI.

[0086] Therefore, the number of repeated transmissions of the current PUSCH can be determined by the DCI indication (dynamic scheduling and unlicensed scheduling of Type 2 PUSCH) or the RepK of the RRC message (unlicensed scheduling of Type 1).

[0087] 2. Duplicate transmission of Type A and Type B

[0088] In the current NR system, two types of repeat transmissions are supported for PUSCH: Type A and Type B repeat transmissions; only Type A repeat transmissions are supported for PUCCH. Taking PUSCH as an example, the repeat transmissions of Type A and Type B are described below:

[0089] Type A Repetition Transmission: In Release 15 (R15), a PUSCH transmission is not allowed to cross slot boundaries. Therefore, to avoid transmitting PUSCH across slot boundaries, the UE can repetite the PUSCH in consecutive available slots via uplink (UL) grant or RRC signaling. This is called PUSCH repetition type A, where the time-domain resources (reserved) are the same for repetitive PUSCH transmissions in each slot. For example, Figure 2 The diagram shows the time-domain resource allocation for repeated Type A PUSCH transmissions.

[0090] Type B Repetition Transmissions: In R16, the Rel-16 protocol introduced PUSCH repetition type B. For PUSCH repetition type B, the time domain resource allocation (TDRA) field in the DCI or the TDRA parameter in type 1 unlicensed scheduling indicates the resources for the first "nominal" repetition. The time domain resources for the remaining repetitions are calculated based on the time domain resources of the first PUSCH and the UL / downlink (DL) timeslot configuration. If a "nominal" transmission crosses a timeslot boundary or DL / UL switching point, the "nominal" transmission splits into multiple PUSCH repetitions at the timeslot boundary or switching point; therefore, the actual number of repetitions can be greater than the indicated value. For example, Figure 3 The diagram shown illustrates repeated Type B PUSCH transmissions across slot boundaries, demonstrating "automatic cutting" when crossing slot boundaries.

[0091] 3. The current NR protocol supports frequency hopping for repeated transmissions: frequency hopping within a slot and frequency hopping between slots.

[0092] Taking PUSCH as an example, when PUSCH is scheduled using DCI format 0_2, the frequency hopping indication is indicated by the RRC parameter PUSCH configuration::frequencyHopping-forDCIFormat0_2; when PUSCH is scheduled using other DCI formats, it is indicated by PUSCH::frequencyHopping.

[0093] Typically, network devices configure candidate frequency hopping offsets via RRC higher-layer signaling, meaning that the terminal device makes a certain offset based on the frequency domain position of the previous transmission.

[0094] Currently, it supports frequency hopping within and between slots for terminal devices. There are two hopping locations, and the hopping pattern can be as follows: Figure 4 The diagram shows repeated transmissions of frequency hopping within a slot and Figure 5 The diagram shows repeated transmissions via frequency hopping between slots.

[0095] Taking PUCCH transmission as an example, the current NR protocol supports PUCCH format1 / 3 / 4 configuration slot repetition, and the number of repetitions is configured through RRC signaling;

[0096] The time-domain resource configuration of PUCCH slot repetition is similar to that of Ty peA's PUSCH repetition, that is, it repeats on multiple consecutive slots, occupying the same time-domain symbol position in each slot. The number of time-domain symbols occupied by each slot is configured through RRC signaling.

[0097] When the PUCCH repeats, it can only hop between slots, meaning that the PUCCH in odd slots and even slots are at two different carrier frequency positions.

[0098] When the UE determines that the number of available time-domain symbols in the current slot is less than the length of the configured PUCCH, it will not send a PUCCH in the current slot.

[0099] As mentioned above, the current NR protocol supports too few frequency hopping positions. Given an offset, there are only two frequency hopping positions within and between slots. Therefore, the gain of frequency-selective scheduling may not be fully utilized. Furthermore, in current repetitive transmissions, such as frequency-hopping-based repetitive transmissions, multiple repetitive transmissions use the same DMRS configuration. This means that the pilot density or position of the DMRS is the same in multiple repetitive transmissions and frequency hopping, indicating insufficient flexibility in DMRS configuration and resulting in poor transmission performance.

[0100] Based on the above problems, this application proposes an information transmission method that considers the joint configuration of DMRS during multiple repeated transmissions (based on frequency hopping) in joint channel estimation, which can improve transmission performance and enable frequency hopping at multiple frequency domain positions within and between slots, thereby making full use of the gain of frequency-selective scheduling.

[0101] This application provides an information transmission method applicable to, for example, Figure 1 The communication system shown. (See attached image.) Figure 6 As shown, the specific process of this method may include:

[0102] Step 601: The network device determines first information, which is used to indicate the DMRS resources configured in each of the K repeated transmissions; the DMRS resources configured in at least two of the K repeated transmissions are different; wherein the configured DMRS resources indicate the time domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2.

[0103] Specifically, the time domain position can be represented by a start position and the number of symbols occupied; the time domain position can also be represented by an end position and the number of symbols occupied; the time domain position can also be represented by a start position and an end position, and this application does not limit this.

[0104] Step 602: The network device sends first information to the terminal device, that is, the terminal device receives the first information from the network device.

[0105] Step 603: The terminal device performs the K repeated transmissions according to the DMRS resources configured for each repeated transmission in the first information.

[0106] In one optional implementation, the network device further sends second information to the terminal device, the second information indicating N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2. This allows the terminal device to perform repeated transmissions with frequency hopping based on the N frequency hopping positions.

[0107] In one alternative implementation, the second information indicates a frequency hopping offset used to determine the N frequency hopping positions. The frequency hopping offset is an offset relative to the first frequency hopping position. Since the second information indicates only one frequency hopping offset, it can indicate that the terminal device performs uniform frequency hopping, meaning that the two frequency hopping intervals corresponding to two consecutive frequency hoppings are the same. In this case, the second information can also indicate the number of frequency hopping operations to determine the N frequency hopping positions.

[0108] Specifically, when the terminal device performs uniform frequency hopping, the frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; where i is an integer greater than or equal to 1 and less than or equal to K. For example, the frequency hopping position during each repeated transmission can conform to the following formula:

[0109]

[0110] Among them, RB start 1 represents the frequency hopping position during repeated transmissions, which is RB. start For the first frequency hopping position during repeated transmission, l d The number of time-domain symbols used in one transmission, the total number of symbols in one time slot is 14, i and k0 are the number of transmissions between two consecutive frequency hopping, and RB is the number of symbols used in one transmission. offset This refers to the frequency hopping offset.

[0111] For example, when k0 is 1, based on the above formula one, the frequency hopping position for each repeated transmission can be obtained according to the following formula two:

[0112]

[0113] For example, when k0 is 2, based on Formula 1 above, the frequency hopping position for each repeated transmission can be obtained according to Formula 3:

[0114]

[0115] In another optional implementation, the second information indicates multiple frequency hopping offsets, which are used to determine the N frequency hopping positions. Each frequency hopping offset is an offset relative to the first frequency hopping position. By indicating multiple frequency hopping offsets, the second information can indicate that the terminal device is performing non-uniform frequency hopping, that is, the two frequency hopping intervals corresponding to two consecutive frequency hoppings are not the same. For example, in the case of non-uniform frequency hopping, the frequency hopping position during each repeated transmission can conform to the following formula:

[0116]

[0117] Among them, RB start 2 represents the frequency hopping position during repeated transmissions, RB offset1 RB offset2 ... RB offsetN The multiple frequency hopping offsets are N, here representing the N frequency hopping offsets.

[0118] Specifically, it can be determined through Formula 4 above that the corresponding frequency hopping position can be obtained through each frequency hopping offset. In other words, multiple frequency hopping positions can be obtained based on the multiple frequency hopping offsets indicated by the second information.

[0119] In one optional implementation, each of the N frequency hopping positions corresponds to H consecutive repetitive transmissions, where H is an integer greater than or equal to 2, and K is greater than or equal to twice H. That is, frequency hopping occurs every H repetitive transmissions.

[0120] The following example illustrates the specific method of frequency hopping repetitive transmission. Taking PUSCH repetitive transmission as an example, assuming K = 8 repetitive transmissions, the number of time-domain symbols scheduled in a single transmission is l. d If the frequency hopping value is 3, then frequency hopping can be performed at N=4 different frequency hopping positions, with a frequency hopping interval of k0 transmissions in 8 repeated transmissions.

[0121] For example, when k0 takes values ​​of 1 and 2, its frequency hopping pattern can be as follows: Figure 7 and Figure 8 As shown. Among them, Figure 7 , Figure 8 All examples are based on the repeated transmission of PUSCH in Type A. Figure 7 Within a single slot, four repeated transmissions can occur, with frequency hopping performed on adjacent repeated transmissions; within two slots, a total of eight repeated transmissions occur, with frequency hopping performed on adjacent repeated transmissions. There are a maximum of four candidate frequency hopping positions. Figure 8 In this configuration, four repeated transmissions can be performed within a slot, with frequency hopping occurring every two repeated transmissions (i.e., the case where H=2). A total of eight repeated transmissions are performed within two slots, with frequency hopping occurring every two repeated transmissions. There are a maximum of four candidate frequency hopping positions.

[0122] For example, the above premise also applies to Type B repetitive transmissions. Compared to Type A repetitive transmissions, Type B repetitive transmissions do not require the time domain positions of PUSCH repetitions between slots to be the same. Type B repetitive transmissions can cross slot boundaries, and multiple repetitive transmissions are sent consecutively. For example, when k0 takes values ​​of 1 and 2, the frequency hopping pattern for Type B PUSCH repetitive transmissions can be as follows: Figure 9 and Figure 10 As shown. When multiple repeated transmissions are performed continuously across slot boundaries, as... Figure 9 and Figure 10 The fifth repeated transmission shown is split into two repeated transmissions (the fifth repeated transmission becomes the fifth and sixth repeated transmissions), so the terminal device will actually perform nine repeated transmissions, but the total number of time-domain symbols occupied by the repeated transmissions remains unchanged.

[0123] The example above describes a PUSCH with a time-domain symbol count of l in a single transmission. d When the value is 3, frequency hopping can be performed at 4 different frequency hopping positions. Furthermore, the number of time-domain symbols in a single transmission of PUSCH is 1. d When the number of PUSCH symbols in a single transmission is 1, frequency hopping can be performed at 3 different frequency hopping positions; or when the number of time-domain symbols in a single PUSCH transmission is 1 dWhen k = 5, 6, or 7, frequency hopping can be performed at two different frequency domain positions. Besides the values ​​of 1 and 2 mentioned above, k0 can also have other values, such as 3, 4, etc. The frequency hopping method types vary depending on the time domain symbol of the single PUSCH transmission and the value of k0; these can be referred to interchangeably and will not be listed individually in this application. The number of consecutive non-frequency hopping repetitions k0 and the number of frequency hopping candidate positions N can satisfy: mod(K, k0*N) = 0, that is, the number of repetitions is an integer multiple of k0*N.

[0124] By using the above method, adding more frequency hopping positions (including uniform and non-uniform frequency hopping offsets) during repeated transmissions can achieve better frequency diversity gain in frequency-selective fading channels.

[0125] Furthermore, when performing K repeated transmissions, the terminal device can perform the K repeated transmissions based on the aforementioned frequency hopping method or frequency hopping rules. And the DMRS resources configured in at least two of the K repeated transmissions are different. Several possible examples of the DMRS resources configured in the K repeated transmissions are described in detail below.

[0126] In one optional implementation, the K repeated transmissions may include L groups of repeated transmissions. Each group of repeated transmissions in the first L-1 groups of repeated transmissions of the K repeated transmissions includes N transmissions performed according to the N frequency hopping positions. The last group of repeated transmissions of the K repeated transmissions includes M transmissions performed according to the N frequency hopping positions, where M is less than or equal to N. L is an integer greater than or equal to 2 and less than or equal to K. Each group of repeated transmissions may also be referred to as a repeated transmission for each round of frequency hopping.

[0127] Wherein, the DMRS resources configured in the Pth repetition transmission are different from those configured in the P+1th repetition transmission; P is an integer greater than 1 and less than L; the configured DMRS resources can indicate one of the following: the time-domain position of the front-loaded DMRS in a repetition transmission; no DMRS in a repetition transmission; the time-domain position of the front-loaded DMRS in a repetition transmission; and the time-domain position of the additional DMRS in a repetition transmission.

[0128] In one example, in the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the P+1th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource. That is, in this example, all repeated transmissions in the Pth group of repeated transmissions are configured with the same DMRS resource, and all repeated transmissions in the P+1th group of repeated transmissions are configured with the same DMRS resource.

[0129] For example, when the frequency hopping occurs only after a repetition interval of k0 times, k0 is set to 1, and the number of time-domain symbols scheduled in a single repetition transmission is l... d When = 3, the DMRS resources of the Type A PUSCH based on frequency hopping repetitive transmission configuration can be as follows: Figure 11 As shown. Figure 11 In the first round of frequency hopping (the 1st to 4th repeated transmissions) (which can also be regarded as the Pth group of repeated transmissions), the DMRS configured in each repeated transmission is the first DMRS resource. For example, each repeated transmission contains one front-loaded DMRS, that is, the first DMRS resource indicates the time domain position of the front-loaded DMRS in the corresponding repeated transmission. In the second round of frequency hopping (the 5th to 8th repeated transmissions) (which can also be regarded as the P+1th group of repeated transmissions), the DMRS configured in each repeated transmission is the second DMRS resource. For example, each repeated transmission does not contain DMRS, and the channel estimation results of different frequency domain positions of the previous slot are reused.

[0130] Specifically, Figure 11 In the first round of frequency hopping, the time-domain position of the DMRS resource indicator configured in each repeated transmission can be flexibly configured according to a predefined position. For example, the DMRS can occupy the first time-domain symbol, which allows for more timely channel estimation; or the DMRS can be placed in the middle of the current scheduling time-domain symbol, which allows for more accurate channel estimation of other time-domain symbols; or the DMRS can be placed in the last time-domain symbol of the current scheduling, which facilitates more accurate channel estimation for the next slot when jointly estimating the channel with the next slot (which does not contain the DMRS).

[0131] For example, when the frequency hopping occurs only after a repetition interval of k0 times, k0 is set to 1, and the number of time-domain symbols scheduled for a single repetition transmission is l... d When = 4, the DMRS resources of the Type A PUSCH based on frequency hopping repetitive transmission configuration can be as follows: Figure 12 As shown. Among them, Figure 12 The first DMRS resource can indicate that each retransmission includes one front-loaded DMRS occupying one time-domain symbol (e.g., the first time-domain symbol), and the second DMRS resource can indicate that each retransmission does not contain DMRS. When each retransmission does not contain DMRS, the channel estimation results of other slots are multiplexed.

[0132] For example, when the frequency hopping occurs only after a repetition interval of k0 times, k0 is set to 1, and the number of time-domain symbols scheduled for a single repetition transmission is l... dWhen the frequency hopping repetitive transmission configuration of Type A PUSCH is 5, 6, or 7, the DMRS resources can be configured as follows: Figure 13 As shown. Among them, Figure 13 The first DMRS resource can indicate that each retransmission contains one front-loaded DMRS and one additional DMRS, for a total of two time-domain symbols. For example, the front-loaded DMRS can occupy the first time-domain symbol, and the additional DMRS can occupy any time-domain symbol after the first time-domain symbol. The second DMRS resource can indicate that each retransmission does not contain DMRS. When each retransmission does not contain DMRS, the channel estimation results of other slots are multiplexed.

[0133] For example, when the frequency hopping occurs only after a repetition interval of k0 times, k0 is set to 1, and the number of time-domain symbols scheduled for a single repetition transmission is l... d When the frequency hopping repetitive transmission configuration of Type A PUSCH is 5, 6, or 7, the DMRS resources can also be configured as follows: Figure 14 As shown. Among them, Figure 14 The first DMRS resource can indicate that each repeated transmission contains one front-loaded DMRS and one additional DMRS, for a total of two time-domain symbols. For example, the front-loaded DMRS can occupy the first time-domain symbol, and the additional DMRS can occupy any time-domain symbol after the first time-domain symbol. The second DMRS resource can indicate that each repeated transmission contains one front-loaded DMRS that occupies one time-domain symbol (such as the first time-domain symbol).

[0134] It should be noted that when the DMRS resource indication configured in the aforementioned repeated transmissions includes DMRS, the time domain symbol occupied by DMRS can be more than just one time domain symbol, and the specific time domain symbol occupied is merely an example. For instance, the DMRS time domain position can occupy the preceding, middle, or ending time domain symbols of the currently scheduled repeated transmission, allowing for flexible configuration, which is not limited in this application.

[0135] Specifically, the above-mentioned l d =3, l d =4 and l d The DMRS resources configured for 5, 6, and 7 can be predefined as the DMRS resources configured in Table 2 in the existing protocol for repeated transmissions, compared to the DMRS resources configured in Table 1. The DMRS resources configured in Table 2 can then be used to indicate the temporal position of the DMRS in a single repeated transmission.

[0136] Table 1

[0137]

[0138] Table 2

[0139]

[0140]

[0141] In another example, the DMRS resources configured for the Pth group of repeated transmissions differ from those configured for the (P+1)th group of repeated transmissions in that the DMRS resources configured for repeated transmissions at the first frequency domain position in the Pth group of repeated transmissions are different from those configured for repeated transmissions at the first frequency domain position in the (P+1)th group of repeated transmissions. That is, the DMRS resources configured for repeated transmissions at the same frequency domain position differ in two consecutive groups of repeated transmissions.

[0142] For example, when the frequency hopping occurs only after a repetition interval of k0 times, k0 is set to 1, and the number of time-domain symbols scheduled in a single repetition transmission is l... d When = 3, the DMRS resources of the Type A PUSCH based on frequency hopping repetitive transmission configuration can be as follows: Figure 15 As shown. Figure 15 In this context, the DMRS resources configured in two consecutive groups of repetitive transmissions at the same frequency domain position (i.e., the same frequency hopping offset position) are different. For example, the 1st repetitive transmission (set as group P) and the 5th repetitive transmission (set as group P+1) are configured at the same frequency domain position such that the 1st repetitive transmission includes DMRS, while the 5th repetitive transmission does not; the 2nd repetitive transmission (set as group P) and the 6th repetitive transmission (set as group P+1) are configured at the same frequency domain position such that the 2nd repetition does not include DMRS, while the 6th repetition includes DMRS.

[0143] For example, when the frequency hopping occurs only after a repetition interval of k0 times, k0 is set to 1, and the number of time-domain symbols scheduled for a single repetition transmission is l... d When = 4, the DMRS resources of the Type A PUSCH based on frequency hopping repetitive transmission configuration can be as follows: Figure 16 As shown. Figure 16In this context, the DMRS resources configured in two consecutive groups of repetitive transmissions at the same frequency domain position (i.e., the same frequency hopping offset position) are different. For example, the first repetitive transmission (set as group P) and the fourth repetitive transmission (set as group P+1) are configured at the same frequency domain position such that the first repetitive transmission includes DMRS, while the fourth repetitive transmission does not; the second repetitive transmission (set as group P) and the fifth repetitive transmission (set as group P+1) are configured at the same frequency domain position such that the second repetition does not include DMRS, while the fifth repetition includes DMRS.

[0144] For example, when the frequency hopping occurs only after a repetition interval of k0 times, k0 is set to 1, and the number of time-domain symbols scheduled for a single repetition transmission is l... d When the frequency hopping repetitive transmission configuration of Type A PUSCH is 5, 6, or 7, the DMRS resources can be configured as follows: Figure 17 or Figure 18 As shown. Figure 17 or Figure 18 In this context, the DMRS resources configured in two consecutive sets of repeated transmissions at the same frequency domain location (i.e., the same frequency hopping offset location) are different. For example: Figure 17 In this context, the first repeated transmission (set as group P) and the third repeated transmission (set as group P+1) are configured at the same frequency domain position as follows: the first repeated transmission contains 2 DMRS, and the third repeated transmission does not contain DMRS. Figure 18 In this embodiment, the first repeated transmission (set as group P) and the third repeated transmission (set as group P+1) are configured at the same frequency domain position, with the first repeated transmission containing 2 DMRS and the third repeated transmission containing 1 DMRS. This application does not limit the start position (and / or end position) and the number of time-domain symbols occupied by the included DMRS when any repeated transmission contains DMRS.

[0145] It should be noted that when the DMRS resource indication configured in the aforementioned repeated transmission includes DMRS, the time domain symbol occupied by DMRS can be more than just one time domain symbol, and it is not limited to which time domain symbol it occupies. For example, the DMRS time domain position can occupy the time domain symbol before the currently scheduled repeated transmission, the time domain symbol of the time, or the time domain symbol at the end, and can be flexibly configured. This application does not impose any limitations on this.

[0146] Specifically, the l involved in the above example d =3, l d =4 and l dThe DMRS resources configured as 5, 6, and 7 can be predefined as the DMRS resources configured in Table 3, and the temporal position of the DMRS in a repetitive transmission can be indicated by the DMRS resources configured in Table 2.

[0147] Table 3

[0148]

[0149] In an alternative implementation, the K repeated transmissions may also include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions comprising N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions comprising M transmissions according to the N frequency hopping positions, where M is less than or equal to N; and L is an integer greater than or equal to 2 and less than or equal to K.

[0150] Wherein, at least one of the L groups of repeated transmissions uses at least two configurations of DMRS resources; the configuration of the DMRS resources indicates one of the following: the time-domain position of the preceding DMRS in a repeated transmission; no DMRS included in a repeated transmission; the time-domain position of the preceding DMRS in a repeated transmission; and the time-domain position of the additional DMRS in a repeated transmission.

[0151] In one example, the use of at least two DMRS resource configurations in at least one group of L repeated transmissions can specifically mean that the DMRS resources configured for repeated transmissions at at least two different frequency domain locations in the at least one group of repeated transmissions are different. That is, the DMRS resources are jointly configured for repeated transmissions at different frequency domain dimensions. For example, the DMRS resources configured for the first repeated transmission are different from those configured for the second repeated transmission.

[0152] For example, it can also be done through Figures 15-18 The DMRS resources shown are different for at least one set of repeated transmission configurations at at least two different frequency domain locations. For example, Figure 15 In the first group of repeated transmissions, the repeated transmission at the first frequency domain position includes DMRS, while the repeated transmission at the second frequency domain position does not include DMRS; Figure 16 In the first group of repeated transmissions, the repeated transmission at the first frequency domain position includes DMRS, while the repeated transmission at the second frequency domain position does not include DMRS; Figure 17 In the first group of repeated transmissions, the repeated transmission at the first frequency domain position contains 2 DMRS, while the repeated transmission at the second frequency domain position does not contain DMRS; Figure 18In the first group of repeated transmissions, the repeated transmission at the first frequency domain position contains 2 DMRS, and the repeated transmission at the second frequency domain position contains 1 DMRS.

[0153] Furthermore, the above Figures 15-18 The diagram can show the repeated transmissions in the first round of frequency hopping, where DMRS resources are jointly configured for repeated transmissions at different frequency domain locations, such as: multiple DMRS-few DMRS-multiple DMRS; the repeated transmissions in the second round of frequency hopping are jointly configured with DMRS resources for multiple repeated transmissions at the same frequency domain location in the first round of frequency hopping, such as: multiple DMRS-few DMRS-multiple DMRS. Figures 15-18 This indicates that the DMRS resources configured for repeated transmissions within the same group are different, and the DMRS resources configured for repeated transmissions between two consecutive groups are also different.

[0154] In another optional implementation, each of the N frequency hopping positions corresponds to H (i.e., k0) consecutive repetitive transmissions, wherein at least two of the H repetitive transmissions have different DMRS resources configured; where H is an integer greater than or equal to 2, and K is greater than or equal to twice H. That is, frequency hopping is performed only once every H repetitive transmissions, and H consecutive repetitive transmissions correspond to the same frequency hopping position.

[0155] In one example, joint DMRS configuration is performed for H repeated transmissions at the same frequency hopping position. For example, the earlier repeated transmissions in the H repeated transmissions contain more DMRS, while the later repeated transmissions contain fewer DMRS; or the middle repeated transmissions contain more DMRS, while the earlier and later repeated transmissions contain fewer DMRS. That is, as long as at least two of the H repeated transmissions have different DMRS resources configured, it is acceptable.

[0156] For example, when H=2 and N=4, the number of time-domain symbols in a single repeated transmission schedule is l d When K=3 and K=8, the DMRS resources configured for frequency hopping repetitive transmission using TypeAPUSCH can be configured as follows: Figure 19 As shown. In Figure 19 In this process, there are two repeated transmissions at the same frequency hopping position, followed by frequency hopping. Each frequency hopping position has two repeated transmissions. The DMRS resources configured in these two repeated transmissions are different: the first repeated transmission at any frequency hopping position contains one DMRS, while the second repeated transmission does not contain one DMRS.

[0157] For example, when H=2 and N=3, when the number of time-domain symbols in a single repeated transmission schedule is l d When K=4 and K=8, the DMRS resources configured for frequency hopping repetitive transmission using TypeAPUSCH can be configured as follows: Figure 20 As shown. In Figure 20 In this diagram, there are three repeated transmissions at the same frequency hopping position, followed by frequency hopping. Each frequency hopping position has three repeated transmissions. Two of these three repeated transmissions have different DMRS resources: the first repeated transmission at any frequency hopping position contains one DMRS, the second repeated transmission does not contain one DMRS, and the third repeated transmission does not contain one DMRS. That is, the first repeated transmission contains more DMRS (e.g., one DMRS), while subsequent repeated transmissions contain fewer DMRS (e.g., none). Furthermore, the middle repeated transmissions can contain more DMRS (e.g., one DMRS), while the first and last repeated transmissions contain fewer DMRS (e.g., none). The specific time-domain location of the DMRS included in the repeated transmissions can be flexibly configured, and is not shown in the diagram.

[0158] For example, when H=2 and N=2, the number of time-domain symbols in a single repeated transmission schedule is l. d When K=5, 6, 7, and K=8, the DMRS resources of the Type A PUSCH based on frequency hopping repetitive transmission configuration can be as follows: Figure 21 As shown. In Figure 21 In this process, there are two repeated transmissions at the same frequency hopping position, followed by frequency hopping. Each frequency hopping position has two repeated transmissions. The DMRS resources configured in these two repeated transmissions are different: the first repeated transmission at any frequency hopping position contains one DMRS, while the second repeated transmission does not contain one DMRS.

[0159] It should be noted that the examples above illustrate the configuration of DMRS resources for repeated transmissions and frequency hopping during Type A repetition. Similarly, in Type B repetition, slot boundary crossing only occurs when slot boundaries need to be crossed. When crossing boundaries, the previous single repeated transmission needs to be transmitted twice, but this does not affect the configuration of DMRS resources. The configuration of DMRS resources can be referred to the examples above, and will not be listed in detail in this application.

[0160] It should be noted that the examples listed above are merely examples of situations where the DMRS resources configured in at least two of the K repeated transmissions are different, and do not constitute a limitation on the different DMRS resources configured in at least two of the K repeated transmissions in this application. There are many other cases. For example, in the K repeated transmissions, the DMRS resource configured in each of the first to Ath repeated transmissions is the third DMRS resource, and the DMRS resource configured in each of the (A+1)th to Kth repeated transmissions is the fourth DMRS resource; where A is an integer greater than 1 or less than K. The third or fourth DMRS resource can indicate one of the following: the temporal position of the preceding DMRS in a single repeated transmission; no DMRS in a single repeated transmission; the temporal position of the preceding DMRS in a single repeated transmission; and the temporal position of the additional DMRS in a single repeated transmission. Of course, there are many other examples, as long as the DMRS resources configured in at least two of the K repeated transmissions are different, they can all be included within the information transmission method of this application. This application will not list them all.

[0161] The information transmission method provided in this application embodiment can flexibly configure DMRS resources for multiple repeated transmissions, thereby obtaining the performance gain of joint channel estimation and improving transmission performance.

[0162] Based on the above embodiments, this application also provides an information transmission device, see below. Figure 22 As shown, the information transmission device 2200 may include a transceiver unit 2201 and a processing unit 2202. The transceiver unit 2201 is used for receiving or sending information (messages or data) to the information transmission device 2200, while the processing unit 2202 is used to control and manage the operations of the information transmission device 2200. The processing unit 2202 can also control the steps performed by the transceiver unit 2201.

[0163] For example, the information transmission device 2200 may be a network device in the above embodiments, specifically a processor, chip, chip system, or functional module in the network device; or, the information transmission device 2200 may be a terminal device in the above embodiments, specifically a processor, chip, chip system, or functional module in the terminal device.

[0164] In one embodiment, when the information transmission device 2200 is used to implement the functions of the network device in the above embodiment, it may specifically include:

[0165] The processing unit 2202 is used to determine first information, which indicates the demodulation reference symbol (DMRS) resources configured in each of the K repeated transmissions; the DMRS resources configured in at least two of the K repeated transmissions are different; wherein the configured DMRS resources indicate the time-domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2; the transceiver unit 2201 is used to send the first information to the terminal device.

[0166] In an optional implementation, the transceiver unit 2201 is further configured to: send second information to the terminal device, the second information being used to indicate N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2.

[0167] In one example, the second information indicates a frequency hopping offset, which is used to determine the N frequency hopping positions; wherein, the frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K.

[0168] In another example, the second information indicates multiple frequency hopping offsets used to determine the N frequency hopping positions.

[0169] In one optional implementation, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N; and L is an integer greater than or equal to 2 and less than or equal to K.

[0170] The DMRS resources configured for the Pth retransmission are different from those configured for the P+1th retransmission; where P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: the temporal position of the preceding DMRS in a retransmission; no DMRS in a retransmission; the temporal position of the preceding DMRS in a retransmission; and the temporal position of the additional DMRS in a retransmission.

[0171] Specifically, in the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the P+1th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource.

[0172] In another optional implementation, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N; and L is an integer greater than or equal to 2 and less than or equal to K.

[0173] At least one of the L groups of repeat transmissions uses at least two configurations of DMRS resources; the configuration of the DMRS resources indicates one of the following: the time-domain position of the preceding DMRS in a repeat transmission; no DMRS in a repeat transmission; the time-domain position of the preceding DMRS in a repeat transmission; and the time-domain position of the additional DMRS in a repeat transmission.

[0174] For example, the DMRS resources configured in the Pth group of repeated transmissions are different from those configured in the P+1th group of repeated transmissions, including: the DMRS resources configured in the repeated transmissions at the first frequency domain position in the Pth group of repeated transmissions are different from those configured in the repeated transmissions at the first frequency domain position in the P+1th group of repeated transmissions.

[0175] Optionally, the use of at least two DMRS resource configurations in at least one of the L groups of repeated transmissions includes: the DMRS resources configured for repeated transmissions at at least two different frequency domain locations in the at least one group of repeated transmissions are different.

[0176] In another optional implementation, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured; wherein H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

[0177] In another embodiment, when the information transmission device 2200 is used to implement the functions of the terminal device in the above embodiments, it may specifically include:

[0178] The transceiver unit 2201 is configured to receive first information from the network device, the first information indicating demodulation reference symbol (DMRS) resources configured in K repeated transmissions; the DMRS resources configured in at least two of the K repeated transmissions are different; wherein the configured DMRS resources indicate the time-domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2; the processing unit 2202 is configured to perform the K repeated transmissions according to the DMRS resources configured for each repeated transmission in the first information.

[0179] In an optional implementation, the transceiver unit 2201 is further configured to: receive second information from the network device, the second information being used to indicate N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2.

[0180] In one example, the second information indicates a frequency hopping offset, which is used to determine the N frequency hopping positions; wherein, the frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K.

[0181] In another example, the second information indicates multiple frequency hopping offsets used to determine the N frequency hopping positions.

[0182] In one optional implementation, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N; and L is an integer greater than or equal to 2 and less than or equal to K.

[0183] The DMRS resources configured for the Pth retransmission are different from those configured for the P+1th retransmission; where P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: the temporal position of the preceding DMRS in a retransmission; no DMRS in a retransmission; the temporal position of the preceding DMRS in a retransmission; and the temporal position of the additional DMRS in a retransmission.

[0184] Specifically, in the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the P+1th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource.

[0185] In another optional implementation, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N; and L is an integer greater than or equal to 2 and less than or equal to K.

[0186] At least one of the L groups of repeat transmissions uses at least two configurations of DMRS resources; the configuration of the DMRS resources indicates one of the following: the time-domain position of the preceding DMRS in a repeat transmission; no DMRS in a repeat transmission; the time-domain position of the preceding DMRS in a repeat transmission; and the time-domain position of the additional DMRS in a repeat transmission.

[0187] For example, the DMRS resources configured in the Pth group of repeated transmissions are different from those configured in the P+1th group of repeated transmissions, including: the DMRS resources configured in the repeated transmissions at the first frequency domain position in the Pth group of repeated transmissions are different from those configured in the repeated transmissions at the first frequency domain position in the P+1th group of repeated transmissions.

[0188] Optionally, the use of at least two DMRS resource configurations in at least one of the L groups of repeated transmissions includes: the DMRS resources configured for repeated transmissions at at least two different frequency domain locations in the at least one group of repeated transmissions are different.

[0189] In another optional implementation, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured; wherein H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

[0190] It should be noted that the division of units in the embodiments of this application is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The functional units in the embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0191] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0192] This application also provides another information transmission device, which can be referred to in the embodiments. Figure 23 As shown, the information transmission device 2300 may include a transceiver 2301 and a processor 2302. Optionally, the information transmission device 2300 may also include a memory 2303. The memory 2303 may be located inside or outside the information transmission device 2300. The processor 2302 can control the transceiver 2301 to receive and send data or information.

[0193] Specifically, processor 2302 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. Processor 2302 may further include hardware chips. These hardware chips can be application-specific integrated circuits (ASICs), programmable logic devices (PLDs), or combinations thereof. The PLDs can be complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), generic array logic (GALs), or any combination thereof.

[0194] The transceiver 2301, processor 2302, and memory 2303 are interconnected. Optionally, the transceiver 2301, processor 2302, and memory 2303 are interconnected via bus 2304; bus 2304 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 23 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0195] In one alternative implementation, memory 2303 is used to store programs, etc. Specifically, the program may include program code, which includes computer operation instructions. Memory 2303 may include RAM, and may also include non-volatile memory, such as one or more disk storage devices. Processor 2302 executes the application program stored in memory 2303 to implement the above-mentioned functions, thereby realizing the function of information transmission device 2300.

[0196] For example, the information transmission device 2300 may be the aforementioned network device or terminal device.

[0197] In one embodiment, when the information transmission device 2300 is used to implement the functions of the network device in the above embodiment, it may specifically include:

[0198] The processor 2302 is configured to determine first information, which indicates the demodulation reference symbol (DMRS) resources configured in each of the K repeated transmissions; the DMRS resources configured in at least two of the K repeated transmissions are different; wherein the configured DMRS resources indicate the time-domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2; the transceiver 2301 is configured to send the first information to the terminal device.

[0199] In an optional implementation, the transceiver 2301 is further configured to: send second information to the terminal device, the second information being used to indicate N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2.

[0200] In one example, the second information indicates a frequency hopping offset, which is used to determine the N frequency hopping positions; wherein, the frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K.

[0201] In another example, the second information indicates multiple frequency hopping offsets used to determine the N frequency hopping positions.

[0202] In one optional implementation, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N; and L is an integer greater than or equal to 2 and less than or equal to K.

[0203] The DMRS resources configured for the Pth retransmission are different from those configured for the P+1th retransmission; where P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: the temporal position of the preceding DMRS in a retransmission; no DMRS in a retransmission; the temporal position of the preceding DMRS in a retransmission; and the temporal position of the additional DMRS in a retransmission.

[0204] Specifically, in the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the P+1th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource.

[0205] In another optional implementation, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N; and L is an integer greater than or equal to 2 and less than or equal to K.

[0206] At least one of the L groups of repeat transmissions uses at least two configurations of DMRS resources; the configuration of the DMRS resources indicates one of the following: the time-domain position of the preceding DMRS in a repeat transmission; no DMRS in a repeat transmission; the time-domain position of the preceding DMRS in a repeat transmission; and the time-domain position of the additional DMRS in a repeat transmission.

[0207] For example, the DMRS resources configured in the Pth group of repeated transmissions are different from those configured in the P+1th group of repeated transmissions, including: the DMRS resources configured in the repeated transmissions at the first frequency domain position in the Pth group of repeated transmissions are different from those configured in the repeated transmissions at the first frequency domain position in the P+1th group of repeated transmissions.

[0208] Optionally, the use of at least two DMRS resource configurations in at least one of the L groups of repeated transmissions includes: the DMRS resources configured for repeated transmissions at at least two different frequency domain locations in the at least one group of repeated transmissions are different.

[0209] In another optional implementation, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured; wherein H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

[0210] In another embodiment, when the information transmission device 2300 is used to implement the functions of the terminal device in the above embodiments, it may specifically include:

[0211] The transceiver 2301 is configured to receive first information from a network device, the first information indicating demodulation reference symbol (DMRS) resources configured in K repeated transmissions; the DMRS resources configured in at least two of the K repeated transmissions are different; wherein the configured DMRS resources indicate the time-domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2; the processor 2302 is configured to perform the K repeated transmissions according to the DMRS resources configured for each repeated transmission in the first information.

[0212] In an optional implementation, the transceiver 2301 is further configured to: receive second information from the network device, the second information being used to indicate N frequency hopping positions during the K repeated transmissions, where N is an integer greater than or equal to 2.

[0213] In one example, the second information indicates a frequency hopping offset, which is used to determine the N frequency hopping positions; wherein, the frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K.

[0214] In another example, the second information indicates multiple frequency hopping offsets used to determine the N frequency hopping positions.

[0215] In one optional implementation, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N; and L is an integer greater than or equal to 2 and less than or equal to K.

[0216] The DMRS resources configured for the Pth retransmission are different from those configured for the P+1th retransmission; where P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: the temporal position of the preceding DMRS in a retransmission; no DMRS in a retransmission; the temporal position of the preceding DMRS in a retransmission; and the temporal position of the additional DMRS in a retransmission.

[0217] Specifically, in the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the P+1th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource.

[0218] In another optional implementation, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions according to the N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions according to the N frequency hopping positions, where M is less than or equal to N; and L is an integer greater than or equal to 2 and less than or equal to K.

[0219] At least one of the L groups of repeat transmissions uses at least two configurations of DMRS resources; the configuration of the DMRS resources indicates one of the following: the time-domain position of the preceding DMRS in a repeat transmission; no DMRS in a repeat transmission; the time-domain position of the preceding DMRS in a repeat transmission; and the time-domain position of the additional DMRS in a repeat transmission.

[0220] For example, the DMRS resources configured in the Pth group of repeated transmissions are different from those configured in the P+1th group of repeated transmissions, including: the DMRS resources configured in the repeated transmissions at the first frequency domain position in the Pth group of repeated transmissions are different from those configured in the repeated transmissions at the first frequency domain position in the P+1th group of repeated transmissions.

[0221] Optionally, the use of at least two DMRS resource configurations in at least one of the L groups of repeated transmissions includes: the DMRS resources configured for repeated transmissions at at least two different frequency domain locations in the at least one group of repeated transmissions are different.

[0222] In another optional implementation, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured; wherein H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

[0223] Furthermore, in the current scheme, during two adjacent repeated transmissions (i.e., sending), frequency hopping occurs because the frequency domain resources are located differently, for example... Figure 4 As shown, joint channel estimation cannot be performed. Based on this, embodiments of this application also provide an information transmission method that enables joint channel estimation for at least two adjacent repeated transmissions.

[0224] Specifically, a time-domain granularity (i.e., the number of time slots included in a time-domain unit) Z is defined in K repeated transmissions. Time slots 1 to Z use the same frequency-domain resources, while time slots Z+1 to 2Z use the frequency-domain resources after frequency hopping. For example, the terminal device performs inter-group frequency hopping based on a time-domain granularity Z. Each group contains Z time slots, and repeated transmissions of the Z slots within each group use the same transmission power.

[0225] In one example, taking PUSCH repeated transmission as an example, assuming the time-domain granularity of the configured inter-group frequency hopping is Z=2, and 4 repeated transmissions are performed, the schematic diagram of the frequency hopping method for repeated transmission of the terminal device according to the existing technology can be shown as follows: Figure 24 As shown in Figure (a), the schematic diagram of the frequency hopping method for repeated transmission of terminal equipment using the method provided in the embodiments of this application can be illustrated as follows. Figure 24 As shown in (b).

[0226] It can be seen that, Figure 24 In (a), two adjacent repeated transmissions, such as the first and second repeated transmissions, correspond to different frequency hopping positions, meaning the corresponding frequency domain resources are not the same. Figure 24 In (b), two adjacent repeated transmissions correspond to the same frequency hopping position, that is, the corresponding frequency domain resources are the same. For example, the first and second repeated transmissions correspond to the same frequency domain resources, and the third and fourth repeated transmissions after frequency hopping correspond to the same frequency domain resources.

[0227] exist Figure 24In (b), the repeated transmissions are divided into two groups: the first and second repeated transmissions are in one group, and the third and fourth repeated transmissions are in another group, to achieve inter-group frequency hopping. The transmission power of the two repeated transmissions within the same group can be the same, and the antenna port of the terminal device can be the same. In this way, the network device can perform joint channel estimation and demodulation on the received uplink signal, which helps to improve uplink performance.

[0228] It should be noted that the above Figure 24 The example given is Z=2. Of course, Z can have other values, which will not be listed here.

[0229] In one example, Figure 24 (a) The existing frequency hopping position for each repeated transmission can satisfy the following formula five:

[0230]

[0231] in, Indicates the slot number. for The corresponding frequency hopping position, RB start RB is the first frequency hopping position during repeated transmissions. offset This is the frequency hopping offset. The number of resource blocks (RBs) contained in the bandwidth part (BWP). Indicates the starting position of the RB in the current transmission schedule. start With frequency hopping interval RB offset Frequency hopping to the new RB position start +RB offset It may exceed the range of the current bandwidth portion of the BWP, so a modulo loop is used to determine the new RB position, ensuring that the RB position after frequency hopping is still within the range of the current BWP.

[0232] Furthermore, using the method provided in the embodiments of this application, Figure 24 (b) The frequency hopping position for each repeated transmission can conform to the following formula six:

[0233]

[0234] The information transmission method provided in this application introduces a time-domain granularity during repeated transmissions to perform inter-group frequency hopping, enabling joint channel estimation for multiple repeated transmissions within the same group and improving transmission performance.

[0235] Based on the above embodiments, this application provides a communication system, which may include the network devices and terminal devices involved in the above embodiments.

[0236] This application also provides a computer-readable storage medium for storing a computer program. When the computer program is executed by a computer, the computer can implement the information transmission method provided in the above-described method embodiments.

[0237] This application also provides a computer program product for storing a computer program. When the computer program is executed by a computer, the computer can implement the information transmission method provided in the above method embodiments.

[0238] This application also provides a chip coupled to a memory, which is used to implement the information transmission method provided in the above method embodiments.

[0239] This application also provides a chip system including a processor for supporting the aforementioned information transmission device in implementing the functions described above. Optionally, the chip system further includes a memory for storing necessary program instructions and data for the information transmission device. This chip system can be composed of chips or may include chips and other discrete devices.

[0240] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0241] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should 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, generate instructions 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.

[0242] 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.

[0243] 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.

[0244] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of protection of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An information transmission method, characterized in that, include: The network device determines first information, which is used to indicate the demodulation reference symbol (DMRS) resources configured in each of the K frequency-hopping-based repeated transmissions; the DMRS resources configured in at least two of the K repeated transmissions are different; wherein the configured DMRS resources indicate the time-domain position of the DMRS in one repeated transmission; K is an integer greater than or equal to 2; The network device sends first information to the terminal device; Wherein, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions performed according to N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions performed according to the N frequency hopping positions, where M is less than or equal to N; L is an integer greater than or equal to 2 and less than or equal to K; and N is an integer greater than or equal to 2. The DMRS resources configured for the Pth retransmission are different from those configured for the P+1th retransmission; where P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: the temporal position of the preceding DMRS in a retransmission; no DMRS in a retransmission; the temporal position of the preceding DMRS in a retransmission; and the temporal position of the additional DMRS in a retransmission.

2. The method as described in claim 1, characterized in that, The method further includes: The network device sends second information to the terminal device, the second information being used to indicate the N frequency hopping positions during the K repeated transmissions.

3. The method as described in claim 2, characterized in that, The second information indicates a frequency hopping offset, which is used to determine the N frequency hopping positions; The frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; where i is an integer greater than or equal to 1 and less than or equal to K.

4. The method as described in claim 2, characterized in that, The second information indicates multiple frequency hopping offsets, which are used to determine the N frequency hopping positions.

5. The method according to any one of claims 1-4, characterized in that, In the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the P+1th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource.

6. The method according to any one of claims 1-4, characterized in that, At least one of the L groups of repeat transmissions uses at least two configurations of DMRS resources; the configuration of the DMRS resources indicates one of the following: the time-domain position of the preceding DMRS in a repeat transmission; no DMRS in a repeat transmission; the time-domain position of the preceding DMRS in a repeat transmission; and the time-domain position of the additional DMRS in a repeat transmission.

7. The method according to any one of claims 1-4, characterized in that, The DMRS resources in the Pth group of repeat transmission configuration differ from those in the (P+1)th group of repeat transmission configuration in the following ways: The DMRS resources configured for the repeat transmission at the first frequency domain position in the Pth repeat transmission group are different from those configured for the repeat transmission at the first frequency domain position in the P+1th repeat transmission group.

8. The method as described in claim 6, characterized in that, At least one of the L groups of repeated transmissions uses at least two DMRS resource configurations, including: The DMRS resources configured for the repeated transmissions at at least two different frequency domain locations in the at least one set of repeated transmissions are different.

9. The method according to any one of claims 1-4, characterized in that, Each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured; where H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

10. An information transmission method, characterized in that, include: The terminal device receives first information from the network device, the first information being used to indicate demodulation reference symbol (DMRS) resources configured in K frequency-hopping-based repetitive transmissions; the DMRS resources configured in at least two of the K repetitive transmissions are different; wherein, the configured DMRS resources indicate the time-domain position of the DMRS in one repetitive transmission; K is an integer greater than or equal to 2; The terminal device performs the K repeated transmissions according to the DMRS resources configured for each repeated transmission in the first information; Wherein, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions performed according to N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions performed according to the N frequency hopping positions, where M is less than or equal to N; L is an integer greater than or equal to 2 and less than or equal to K; and N is an integer greater than or equal to 2. The DMRS resources configured for the Pth retransmission are different from those configured for the P+1th retransmission; where P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: the temporal position of the preceding DMRS in a retransmission; no DMRS in a retransmission; the temporal position of the preceding DMRS in a retransmission; and the temporal position of the additional DMRS in a retransmission.

11. The method as described in claim 10, characterized in that, The method further includes: The terminal device receives second information from the network device, the second information being used to indicate the N frequency hopping positions during the K repeated transmissions.

12. The method as described in claim 11, characterized in that, The second information indicates a frequency hopping offset, which is used to determine the N frequency hopping positions; The frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; where i is an integer greater than or equal to 1 and less than or equal to K.

13. The method as described in claim 11, characterized in that, The second information indicates multiple frequency hopping offsets, which are used to determine the N frequency hopping positions.

14. The method according to any one of claims 10-13, characterized in that, In the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the P+1th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource.

15. The method according to any one of claims 10-13, characterized in that, At least one of the L groups of repeat transmissions uses at least two configurations of DMRS resources; the configuration of the DMRS resources indicates one of the following: the time-domain position of the preceding DMRS in a repeat transmission; no DMRS in a repeat transmission; the time-domain position of the preceding DMRS in a repeat transmission; and the time-domain position of the additional DMRS in a repeat transmission.

16. The method according to any one of claims 10-13, characterized in that, The DMRS resources in the Pth group of repeat transmission configuration differ from those in the (P+1)th group of repeat transmission configuration in the following ways: The DMRS resources configured for the repeat transmission at the first frequency domain position in the Pth repeat transmission group are different from those configured for the repeat transmission at the first frequency domain position in the P+1th repeat transmission group.

17. The method as described in claim 15, characterized in that, At least one of the L groups of repeated transmissions uses at least two DMRS resource configurations, including: The DMRS resources configured for the repeated transmissions at at least two different frequency domain locations in the at least one set of repeated transmissions are different.

18. The method according to any one of claims 10-13, characterized in that, Each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured; where H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

19. An information transmission device, characterized in that, include: A processing unit is configured to determine first information, which indicates the demodulation reference symbol (DMRS) resources configured in each of K frequency-hopping-based repeated transmissions; wherein the DMRS resources configured in at least two of the K repeated transmissions are different; wherein the configured DMRS resources indicate the time-domain position of the DMRS in one repeated transmission; and K is an integer greater than or equal to 2. The transceiver unit is used to send the first information to the terminal device; Wherein, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions performed according to N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions performed according to the N frequency hopping positions, where M is less than or equal to N; L is an integer greater than or equal to 2 and less than or equal to K; and N is an integer greater than or equal to 2. The DMRS resources configured for the Pth retransmission are different from those configured for the P+1th retransmission; where P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: the temporal position of the preceding DMRS in a retransmission; no DMRS in a retransmission; the temporal position of the preceding DMRS in a retransmission; and the temporal position of the additional DMRS in a retransmission.

20. The apparatus as claimed in claim 19, characterized in that, The transceiver unit is further configured to: Send a second message to the terminal device, the second message being used to indicate the N frequency hopping positions during the K repeated transmissions.

21. The apparatus as claimed in claim 20, characterized in that, The second information indicates a frequency hopping offset, which is used to determine the N frequency hopping positions; The frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; where i is an integer greater than or equal to 1 and less than or equal to K.

22. The apparatus as claimed in claim 20, characterized in that, The second information indicates multiple frequency hopping offsets, which are used to determine the N frequency hopping positions.

23. The apparatus according to any one of claims 19-22, characterized in that, In the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the P+1th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource.

24. The apparatus according to any one of claims 19-22, characterized in that, At least one of the L groups of repeat transmissions uses at least two configurations of DMRS resources; the configuration of the DMRS resources indicates one of the following: the time-domain position of the preceding DMRS in a repeat transmission; no DMRS in a repeat transmission; the time-domain position of the preceding DMRS in a repeat transmission; and the time-domain position of the additional DMRS in a repeat transmission.

25. The apparatus according to any one of claims 19-22, characterized in that, The DMRS resources in the Pth group of repeat transmission configuration differ from those in the (P+1)th group of repeat transmission configuration in the following ways: The DMRS resources configured for the repeat transmission at the first frequency domain position in the Pth repeat transmission group are different from those configured for the repeat transmission at the first frequency domain position in the P+1th repeat transmission group.

26. The apparatus as claimed in claim 24, characterized in that, At least one of the L groups of repeated transmissions uses at least two DMRS resource configurations, including: The DMRS resources configured for the repeated transmissions at at least two different frequency domain locations in the at least one set of repeated transmissions are different.

27. The apparatus according to any one of claims 19-22, characterized in that, Each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured; where H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

28. An information transmission device, characterized in that, include: A transceiver unit is configured to receive first information from a network device, the first information indicating demodulation reference symbol (DMRS) resources configured in K frequency-hopping repetitive transmissions; wherein the DMRS resources configured in at least two of the K repetitive transmissions are different; wherein the configured DMRS resources indicate the time-domain position of the DMRS in one repetitive transmission; and K is an integer greater than or equal to 2. The processing unit is configured to perform the K repeated transmissions based on the DMRS resources configured for each repeated transmission in the first information. Wherein, the K repeated transmissions include L groups of repeated transmissions, each of the first L-1 groups of repeated transmissions in the K repeated transmissions includes N transmissions performed according to N frequency hopping positions, and the last group of repeated transmissions in the K repeated transmissions includes M transmissions performed according to the N frequency hopping positions, where M is less than or equal to N; L is an integer greater than or equal to 2 and less than or equal to K; and N is an integer greater than or equal to 2. The DMRS resources configured for the Pth retransmission are different from those configured for the P+1th retransmission; where P is an integer greater than 1 and less than L; the configured DMRS resources indicate one of the following: the temporal position of the preceding DMRS in a retransmission; no DMRS in a retransmission; the temporal position of the preceding DMRS in a retransmission; and the temporal position of the additional DMRS in a retransmission.

29. The apparatus as claimed in claim 28, characterized in that, The transceiver unit is further configured to: The network device receives second information, which indicates the N frequency hopping positions during the K repeated transmissions.

30. The apparatus as claimed in claim 29, characterized in that, The second information indicates a frequency hopping offset, which is used to determine the N frequency hopping positions; The frequency hopping position during the i-th repeated transmission is related to the number of time-domain symbols occupied in one transmission, the total number of symbols in one time slot, i, the number of transmissions between two consecutive frequency hoppings, and the frequency hopping offset; where i is an integer greater than or equal to 1 and less than or equal to K.

31. The apparatus as claimed in claim 29, characterized in that, The second information indicates multiple frequency hopping offsets, which are used to determine the N frequency hopping positions.

32. The apparatus according to any one of claims 28-31, characterized in that, In the Pth group of repeated transmissions, the DMRS resource configured in each repeated transmission is the first DMRS resource; in the P+1th group of repeated transmissions, the DMRS resource configured in each repeated transmission is the second DMRS resource.

33. The apparatus according to any one of claims 28-31, characterized in that, At least one of the L groups of repeat transmissions uses at least two configurations of DMRS resources; the configuration of the DMRS resources indicates one of the following: the time-domain position of the preceding DMRS in a repeat transmission; no DMRS in a repeat transmission; the time-domain position of the preceding DMRS in a repeat transmission; and the time-domain position of the additional DMRS in a repeat transmission.

34. The apparatus according to any one of claims 28-31, characterized in that, The DMRS resources in the Pth group of repeat transmission configuration differ from those in the (P+1)th group of repeat transmission configuration in the following ways: The DMRS resources configured for the repeat transmission at the first frequency domain position in the Pth repeat transmission group are different from those configured for the repeat transmission at the first frequency domain position in the P+1th repeat transmission group.

35. The apparatus as claimed in claim 33, characterized in that, At least one of the L groups of repeated transmissions uses at least two DMRS resource configurations, including: The DMRS resources configured for the repeated transmissions at at least two different frequency domain locations in the at least one set of repeated transmissions are different.

36. The apparatus according to any one of claims 28-31, characterized in that, Each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, and at least two of the H repeated transmissions have different DMRS resources configured; where H is an integer greater than or equal to 2, and K is greater than or equal to twice H.

37. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program instructions that, when executed on the device, cause the device to perform the method as described in any one of claims 1 to 18.

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