CN114071752A

CN114071752A - Information transmission method and device

Info

Publication number: CN114071752A
Application number: CN202110053877.7A
Authority: CN
Inventors: 余雅威; 余健; 郭志恒; 陆绍中
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-07-31
Filing date: 2021-01-15
Publication date: 2022-02-18

Abstract

An information transmission method and device are used for realizing joint configuration of a DMRS (demodulation reference signal) during multiple repeated transmission based on frequency hopping so as to improve transmission performance. The method comprises the following steps: the network equipment determines first information and sends the first information to the terminal equipment; the first information is used for indicating demodulation reference symbol (DMRS) resources configured in each repeated transmission in K repeated transmissions; the terminal equipment performs the repeated transmission for K times according to the DMRS resource configured by the repeated transmission for each time in the first information; wherein the DMRS resources configured in at least two of the K repeated transmissions are different; wherein the configured DMRS resource indicates a time-domain location of the DMRS in one repetition transmission. Therefore, the DMRS resources can be flexibly configured for repeated transmission for many times, and the performance gain of channel joint estimation can be obtained to improve the transmission performance.

Description

Information transmission method and device

The present application claims priority from chinese patent application filed on 31/07/31/2020, entitled "a method and apparatus for information transmission" by the chinese patent office, application number 202010762089.0, the entire contents of which are incorporated herein by reference.

Technical Field

The present application relates to the field of communications technologies, and in particular, to an information transmission method and apparatus.

Background

In a wireless communication system, such as a New Radio (NR) communication system, information exchanged between a terminal device and an access device is carried over a physical channel. Data sent by the terminal device, that is, uplink data, is usually carried through a Physical Uplink Shared Channel (PUSCH); control information, that is, uplink control information, transmitted by a terminal device is usually carried through a Physical Uplink Control Channel (PUCCH). In addition, the terminal device may further send a Sounding Reference Signal (SRS), and the access device may estimate channel qualities of the terminal device on different frequencies by receiving the SRS of the terminal device.

In wireless communication, for some deep coverage scenarios, such as cell edge, basement, etc., the path loss of wireless signal propagation is very severe. In this case, coverage enhancement measures need to be considered, which is particularly important for upstream transmission, because the transmit power of the terminal device is often low, e.g., 23dBm, much lower than the transmit power of the access device (e.g., an access device with a bandwidth of 20 megahertz (MHz), which typically has a transmit power of 46 dBm). A method for enhancing coverage performance is to repeatedly transmit data, that is, repeatedly transmit, for example, a terminal device repeatedly transmits PUSCH data, and an access device performs merging detection on the repeatedly transmitted data, which can improve channel estimation performance and data demodulation performance, thereby improving cell coverage capability.

In addition, in a rich scattering environment, when the transmission path is large and the multipath delay spread is large, the coherent bandwidth of the subcarriers in the frequency domain is small, which means that the channel fading is nearly the same within a certain bandwidth range, that is, the fading channel within the coherent bandwidth can be regarded as a quasi-static invariant fading channel. Thus, when the coherence bandwidth is small, there may be large differential fading at different carrier locations across the system bandwidth (outside the coherence bandwidth). Therefore, if the access device can screen out a better frequency domain position for frequency-selective scheduling transmission, that is, frequency hopping transmission, according to the fading characteristics of different carrier positions, the access device is beneficial to reducing signal transmission loss caused by channel fading and improving uplink transmission capability.

Currently, frequency hopping for repeated transmissions is supported in NR. However, when the repeated transmission is performed by the frequency hopping method, the configuration of the demodulation reference symbols (DMRSs) for the repeated transmission is not flexible, and thus the transmission performance is poor.

Disclosure of Invention

The application provides an information transmission method and device, which are used for realizing joint configuration of a DMRS (demodulation reference signal) during multiple repeated transmission based on frequency hopping so as to improve transmission performance.

In a first aspect, the present application provides an information transmission method, which may include: the network equipment determines first information and sends the first information to the terminal equipment; the first information is used for indicating demodulation reference symbol (DMRS) resources configured in each repeated transmission in K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; k is an integer greater than or equal to 2.

By the method, DMRS resources can be flexibly configured for repeated transmission for many times, so that performance gain of channel joint estimation can be obtained to improve transmission performance.

In one possible design, the network device sends second information to the terminal device, where the second information is used to indicate N hopping positions in the K repeated transmissions, and N is an integer greater than or equal to 2. So that the terminal device can perform repeated transmission of frequency hopping based on the N hopping positions.

In one possible design, the second information indicates a hopping offset, and the hopping offset is used to determine the N hopping positions; the frequency hopping position during the ith repeated transmission is related to the number of time domain symbols occupied by one transmission, the total number of symbols of a time slot, i, the transmission times between two continuous frequency hopping and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K.

By the method, the terminal equipment can perform uniform frequency hopping repeated transmission based on the N frequency hopping positions determined by the frequency hopping offset.

In one possible design, the second information indicates a plurality of hop offsets used to determine the N hop positions. So that the terminal device can perform non-uniform frequency hopping repeated transmission based on the N hopping positions determined by the plurality of hopping offsets.

In one possible design, each of the N hop positions corresponds to H consecutive repeated transmissions. Wherein H is an integer greater than or equal to 2, and K is greater than or equal to 2 times H.

In one possible design, the K repeated transmissions include L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions includes N transmissions according to the N hopping positions, a last set of repeated transmissions of the K repeated transmissions includes M transmissions according to the N hopping positions, and M is less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K; the DMRS resources configured for the P group of repeated transmission are different from the DMRS resources configured for the P +1 group of repeated transmission; p is an integer greater than 1 and less than L; the configured DMRS resource indicates one of: pre-locating a time domain position of the DMRS in one repeated transmission; DMRS is not contained in one repeated transmission; a time-domain position of the preamble DMRS in one repetition transmission, and a time-domain position of the additional DMRS in one repetition transmission. Therefore, the DMRS resources of two adjacent groups are different through flexible configuration, so that the performance gain of channel joint estimation is obtained, and the transmission performance is improved.

In one possible design, in the P-th group of repeated transmissions, the DMRS resource configured in each repeated transmission is a first DMRS resource; in the P +1 th group of repeated transmission, the DMRS resource configured in each repeated transmission is a second DMRS resource. Therefore, the DMRS resources configured for repeated transmission in each group are the same, and the configuration is simpler.

In one possible design, the K repeated transmissions include L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions includes N transmissions according to the N hopping positions, a last set of repeated transmissions of the K repeated transmissions includes M transmissions according to the N hopping positions, and M is less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K; at least one of the L sets of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resource indicates one of: a time domain position of a preamble DMRS in one repeated transmission; DMRS is not contained in one repeated transmission; a time-domain position of the preamble DMRS in one repetition transmission, and a time-domain position of the additional DMRS in one repetition transmission. Therefore, through the fact that the DMRS resources configured by repeated transmission in a group are not identical, the performance gain of channel joint estimation can be obtained, and the transmission performance is improved.

In one possible design, the P-th set of DMRS resources of the repetitive transmission configuration being different from the P + 1-th set of DMRS resources of the repetitive transmission configuration includes: the repeated transmission at the first frequency domain position in the P-th group of repeated transmissions is configured with different DMRS resources than the repeated transmission at the first frequency domain position in the P + 1-th group of repeated transmissions. In this way, in two consecutive groups of repeated transmissions, DMRS resources configured for repeated transmissions at the same frequency domain position are different, and performance gain of channel joint estimation can be obtained to improve transmission performance.

In one possible design, at least one of the L sets of repeated transmissions uses at least two DMRS resource configurations including: the DMRS resources of the repetitive transmission configuration at least two different frequency domain locations in the at least one set of repetitive transmissions are different. In this way, DMRS resources can be jointly configured from different repeated transmissions in the dimension of the frequency hopping frequency domain to obtain performance gain of channel joint estimation, so as to improve transmission performance.

In one possible design, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, where DMRS resources configured for at least two repeated transmissions in the H repeated transmissions are different; wherein H is an integer greater than or equal to 2, and K is greater than or equal to 2 times H. Thus, the performance gain of channel joint estimation can be obtained to improve the transmission performance.

In a second aspect, the present application provides an information transmission method, which may include: the terminal equipment receives first information from network equipment, wherein the first information is used for indicating demodulation reference symbol (DMRS) resources configured in K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; the terminal equipment performs the repeated transmission for K times according to the DMRS resource configured by the repeated transmission for each time in the first information; k is an integer greater than or equal to 2.

In one possible design, the terminal device receives second information from the network device, where the second information is used to indicate N hopping positions in the K repeated transmissions, and N is an integer greater than or equal to 2. So that the terminal device can perform repeated transmission of frequency hopping based on the N hopping positions.

In a third aspect, the present application further provides an information transmission apparatus, where the information transmission apparatus may be a network device, and the information transmission apparatus has a function of implementing the network device in the first aspect or each possible design example of the first aspect. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

In one possible design, the structure of the information transmission apparatus may include a transceiver unit and a processing unit, and these units may perform corresponding functions of the network device in the first aspect or each possible design example of the first aspect, for which specific reference is made to detailed descriptions in method examples, which are not described herein again.

In one possible design, the information transmission apparatus includes a transceiver and a processor, and optionally further includes a memory, the transceiver is configured to transmit and receive data and is configured to perform communication interaction with other devices in the communication system, and the processor is configured to support the information transmission apparatus to perform corresponding functions of the network device in the first aspect or each possible design example of the first aspect. The memory is coupled to the processor and retains program instructions and data necessary for the information delivery device.

In a fourth aspect, the present application further provides an information transmission apparatus, which may be a terminal device, and the information transmission apparatus has a function of implementing the terminal device in the second aspect or each possible design example of the second aspect. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.

In a possible design, the structure of the information transmission apparatus may include a transceiver unit and a processing unit, and these units may execute the corresponding functions of the terminal device in the second aspect or each possible design example of the second aspect, specifically refer to the detailed description in the method example, which is not described herein again.

In one possible design, the information transmission apparatus includes a transceiver and a processor, and optionally further includes a memory, the transceiver is configured to transmit and receive data and is configured to perform communication interaction with other devices in the communication system, and the processor is configured to support the information transmission apparatus to perform corresponding functions of the terminal device in the second aspect or each possible design example of the second aspect. The memory is coupled to the processor and retains program instructions and data necessary for the information delivery device.

In a fifth aspect, the present application provides a communication system, which may include the above-mentioned network device and terminal device.

In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores program instructions, and when the program instructions are executed on a computer, the computer is caused to execute the method according to the first aspect and any possible design thereof, and the second aspect and any possible design thereof. By way of example, computer readable storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: a computer-readable medium may include a non-transitory computer-readable medium, a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a CD-ROM or other optical disk storage, a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

In a seventh aspect, embodiments of the present application provide a computer program product comprising computer program code or instructions, which when run on a computer, causes the computer to implement the method of the first aspect and any possible design thereof, the second aspect and any possible design thereof described above.

In an eighth aspect, the present application further provides a chip, coupled to the memory, for reading and executing the program instructions stored in the memory to implement the method of the first aspect and any possible design thereof, the second aspect and any possible design thereof.

For each of the third to eighth aspects and possible technical effects of each aspect, please refer to the description of the possible technical effects for each possible solution in the first or second aspect, and no repeated description is given here.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system provided in the present application;

fig. 2 is a schematic diagram of time domain resource allocation of Type a PUSCH repeated transmission provided in the present application;

fig. 3 is a schematic diagram of a Type B PUSCH repeated transmission crossing a slot boundary provided in the present application;

fig. 4 is a schematic diagram of repeated transmission of frequency hopping within slots according to the present application;

fig. 5 is a schematic diagram of repeated transmission of inter-slot frequency hopping provided in the present application;

fig. 6 is a flowchart of an information transmission method provided in the present application;

fig. 7 is a schematic diagram of a frequency hopping method of PUSCH repeated transmission of TypeA provided in the present application;

fig. 8 is a schematic diagram of another frequency hopping method for PUSCH repeated transmission of TypeA provided in the present application;

fig. 9 is a schematic diagram of a frequency hopping method in PUSCH repeated transmission of TypeB provided in the present application;

fig. 10 is a schematic diagram of a frequency hopping method in PUSCH repeated transmission of another type b provided in the present application;

fig. 11 is a schematic diagram of DMRS resources configured for repeated transmission of a TypeA PUSCH based on frequency hopping according to the present application;

fig. 12 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 13 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 14 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 15 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 16 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 17 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 18 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 19 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 20 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 21 is a schematic diagram of DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping provided in the present application;

fig. 22 is a schematic structural diagram of an information transmission device provided in the present application;

fig. 23 is a structural view of an information transmission apparatus provided in the present application;

fig. 24 is a schematic diagram of a frequency hopping method in PUSCH repeated transmission according to the present application.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application provides an information transmission method and device, which are used for realizing joint configuration of a DMRS (demodulation reference signal) during multiple repeated transmission based on frequency hopping so as to improve transmission performance. The method and the device are based on the same technical concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, nor order.

In the present application, "at least one" means one or more, and a plurality means two or more.

In order to more clearly describe the technical solution of the embodiment of the present application, the following describes in detail an information transmission method and an information transmission apparatus provided by the embodiment of the present application with reference to the accompanying drawings.

Fig. 1 shows an architecture of a possible communication system to which the information transmission method provided in the embodiment of the present application is applicable, where the architecture of the communication system includes a network device and a terminal device, where:

the network device is a device with a wireless transceiving function or a chip that can be set in the network device, and the network device may include but is not limited to: access network equipment, a base station (gNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved NodeB or home Node B, HNB), a baseband unit (BBU), an Access Point (AP) in a wireless fidelity (WIFI) system, a wireless relay Node, a wireless backhaul Node, a Transmission Point (TP), etc., and may also be a network Node that constitutes the gNB or the transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), Medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as RRC layer signaling or PHCP layer signaling, may also be considered to be transmitted by the DU or by the DU + RU under this architecture. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. The CU may be divided into network devices in the access network RAN, or may be divided into network devices in the core network CN, which is not limited to this.

The terminal equipment may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. In the present application, a terminal device having a wireless transceiving function and a chip that can be installed in the terminal device are collectively referred to as a terminal device.

It should be noted that the communication system shown in fig. 1 may be, but is not limited to, a fifth Generation (5G) system, such as NR. Optionally, the method of the embodiment of the present application is also applicable to various future communication systems, such as a 6G system or other communication networks.

In the following, for the sake of facilitating understanding of the embodiments of the present application, first, concepts and basic knowledge related to the embodiments of the present application will be described.

The current NR protocol supports uplink repeated transmission, that is, data is repeatedly transmitted by a terminal device, for example, a UE, and a network device, for example, a gNB, receives and combines the repeatedly transmitted data, so as to improve the signal-to-noise ratio of a received signal, effectively improve the channel estimation capability and demodulation performance, and thus improve the coverage capability of a cell.

1. Signaling configuration for repeated transmissions

For example, for uplink SRS, the current NR protocol supports {1,2,4} repeated transmissions of different times; for PUSCH transmissions, the current NR protocol supports {1,2,4,8} different numbers of repeated transmissions. Currently, the number of repeated transmissions of SRS and PUSCH is configured through Radio Resource Control (RRC) signaling, for example:

the PUSCH may be configured by RRC field (repK, repK-RV): ConfiguredGrantConfig: : RepK { n1, n2, n4, n8 }.

The SRS may be configured by an RRC field (repetition factor): SRS-Resource: { n1, n2, n4 }.

And after receiving the RRC signaling configuration, the UE transmits corresponding repeated times.

Generally, RRC also includes many procedures such as connection management, radio bearer control and connection mobility, and RRC signaling needs to be conveyed from a higher layer to a terminal for a long time (for example, hundreds of milliseconds), so that it is not possible to flexibly and dynamically adapt to changes of a transport channel. Therefore, in the 38.214 protocol in the subsequent NR, a Downlink Control Information (DCI) is introduced to dynamically indicate the number of repeated transmissions of the PUSCH for the PUSCH, so as to flexibly match the channel quality of the current PUSCH transmission. Specifically, the number of repeated transmissions is determined by an index of a Time Domain Resource Allocation (TDRA) table in the DCI.

Therefore, the number of repeated transmissions of the current PUSCH can be determined by DCI indication (dynamic scheduling and Type (Type)2PUSCH unlicensed scheduling) or RepK of RRC message (Type1 unlicensed scheduling).

2. Repeated transmission of Type A and Type B

In current NR systems, two types of repeated transmissions are supported for PUSCH: repeated transmission of type a and type b; only TypeA repetition is supported for PUCCH. Taking PUSCH as an example, repeat transmission of TypeA and TypeB is introduced as follows:

repeated transmission of type a: in R15, transmission of one PUSCH is not allowed to cross a slot (slot) boundary, so to avoid transmission of the PUSCH across the slot boundary, a UE may coordinate repeated transmission of the PUSCH in consecutive available slots through Uplink (UL) grant (grant) or RRC signaling, which is called PUSCH repetition type a, where time domain resources of repeated transmission of the PUSCH in each slot are the same (reserved). For example, fig. 2 illustrates a schematic diagram of time domain resource allocation of Type a PUSCH repeated transmission.

Repeated transmission of TypeB: and a PUSCH repetition type B (PUSCH repetition type B) is newly added in the Rel-16 protocol at R16. For PUSCH retransmission type b, the Time Domain Resource Allocation (TDRA) field in DCI or the TDRA parameter in type1 unlicensed scheduling indicates the first "nominal" repeated resource, and the remaining repeatedly transmitted time domain resources are calculated based on the time domain resource of the first PUSCH and UL/Downlink (DL) slot configuration. If the "nominal" transmission crosses a slot boundary or a DL/UL switch point, the "nominal" transmission is split into multiple PUSCH repetitions at the slot boundary or switch point, so the actual number of repetitions may be greater than the indicated value. For example, the Type B PUSCH repeated transmission illustrated in fig. 3 is across a slot boundary diagram, which can be seen as "auto-slicing" when crossing a slot boundary.

3. Current NR protocols support frequency hopping of repeated transmissions: hopping within slots and hopping between slots.

Taking the PUSCH as an example, when the PUSCH is scheduled through DCI format0_ 2(DCI format0_ 2), the indication of frequency hopping is indicated through RRC parameter PUSCH configuration (PUSCH-configuration): frequency hopping-frequency scheduling 0_ 2; when the PUSCH is scheduled by DCI of other formats, it is indicated by PUSCH:: frequency hopping.

In general, the network device configures candidate frequency hopping offset (frequency hoppingoffset) through RRC high layer signaling, that is, the terminal device performs a certain offset (offset) offset according to the frequency domain position of the previous transmission.

At present, the terminal device is supported to hop within a slot and hop between slots, there are two locations of hopping, and a hopping pattern (pattern) may be a repeated transmission diagram of hopping within a slot as shown in fig. 4 and a repeated transmission diagram of hopping between slots as shown in fig. 5.

Taking PUCCH transmission as an example, the current NR protocol supports PUCCH format1/3/4 configuration slot repetition (slot repetition), and the repetition times are configured through RRC signaling;

the time domain resource configuration of PUCCH slot retransmission is similar to PUSCH repetition of Ty PEA, namely, the time domain resource configuration is repeated on the same time domain symbol position occupying each slot on a plurality of continuous slots, and the number of the time domain symbols occupied by each slot is configured through RRC signaling;

the PUCCH can only hop between slots when repeated, i.e. odd and even slots of PUCCH are on two different carrier frequency positions.

And when the UE judges that the number of the time domain symbols available in the current slot is less than the length occupied by the configured PUCCH, the PUCCH is not sent in the current slot.

As mentioned above, the current NR protocol supports too few hopping positions, i.e. after a given offset, there are only two hopping positions within and between slots, and therefore the gain of the frequency selective scheduling may not be fully utilized. Moreover, in current repeated transmission, for example, in repeated transmission based on frequency hopping, the same DMRS configuration is adopted for multiple repeated transmissions, that is, the pilot densities or positions of the DMRSs in the multiple repeated transmissions and the frequency hopping are the same, that is, the DMRSs are not configured flexibly enough, which may result in poor transmission performance.

Based on the above problem, the present application provides an information transmission method, in which DMRS joint configuration is considered when multiple repeated transmissions (based on frequency hopping) are performed during joint channel estimation, so that transmission performance can be improved, and frequency hopping at multiple frequency domain positions can be performed within a slot and between slots, thereby fully utilizing gains of frequency selective scheduling.

The information transmission method provided by the embodiment of the application is suitable for the communication system shown in fig. 1. Referring to fig. 6, a specific process of the method may include:

step 601, the network device determines first information, wherein the first information is used for indicating DMRS resources configured in each repeated transmission in K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; k is an integer greater than or equal to 2.

Specifically, the time domain position may be represented by an initial position and an occupied number of symbols; the time domain position can also be represented by an end position and the number of occupied symbols; the time domain position may also be represented by a start position and an end position, which is not limited in this application.

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.

And 603, the terminal equipment performs the repeated transmission for K times according to the DMRS resource configured in the repeated transmission of each time in the first information.

In an optional implementation manner, the network device further sends second information to the terminal device, where the second information is used to indicate N frequency hopping positions in the K times of repeated transmission, and N is an integer greater than or equal to 2. So that the terminal device can perform repeated transmission of frequency hopping based on the N hopping positions.

In an alternative embodiment, the second information indicates a frequency hopping offset (offset) used to determine the N frequency hopping positions. Wherein the hopping offset is an offset relative to a first hopping position. The second information may indicate that the terminal device performs uniform frequency hopping because only one frequency hopping offset is indicated, that is, two frequency hopping intervals corresponding to two consecutive frequency hopping are the same. In this case, the second information may further indicate the number of frequency hops, thereby determining N hopping positions.

Specifically, under the condition that the terminal device performs uniform frequency hopping, the frequency hopping position during the ith repeated transmission is related to the number of time domain symbols occupied by one transmission, the total number of symbols of a time slot, i, the transmission times between two consecutive frequency hopping, and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K. For example, the frequency hopping position at each repeated transmission may conform to the following formula one:

wherein RB_start1 is the frequency hopping position in repeated transmission, RB_startFor the first hop position in repeated transmission,/_dThe number of time domain symbols occupied for one transmission, the total number of symbols of one time slot is 14, i and k0 are the transmission times between two continuous frequency hopping, RB_offsetIs the frequency hopping offset.

For example, when k0 is 1, the frequency hopping position at each repeated transmission can be obtained based on the above formula one and can conform to the following formula two:

for another example, when k0 is 2, the hopping position at each repeated transmission can be obtained based on the above formula one, and the following formula three can be satisfied:

in another optional implementation, the second information indicates a plurality of hopping offsets, and the plurality of hopping offsets are used to determine the N hopping positions. Wherein any one of the hop offsets is an offset relative to the first hop position. The second information may indicate that the terminal device performs uneven frequency hopping by indicating a plurality of frequency hopping offsets, that is, two frequency hopping intervals corresponding to two consecutive frequency hopping are different. For example, in the case of non-uniform frequency hopping, the hopping position at each repeated transmission may conform to the following formula four:

wherein RB _start2 is the frequency hopping position in repeated transmission, RB_offset1、RB_offset2、……、RB_offsetNFor the plurality of hop offsets, here N hop offsets.

Specifically, it can be determined by the fourth formula that a corresponding hopping position can be obtained by each hopping offset, that is, a corresponding plurality of hopping positions can be obtained based on a plurality of hopping offsets indicated by the second information.

In an optional implementation manner, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, where H is an integer greater than or equal to 2, and K is greater than or equal to 2 times H. That is, to say, frequency hopping is performed every H repeated transmissions.

The following illustrates a specific manner of repeated transmission of frequency hopping by a specific example. Taking repeated transmission of PUSCH as an example, assuming that K ═ 8 repeated transmissions are performed, the number of time domain symbols l scheduled for a single transmission_dFrequency hopping can be performed for N-4 different hopping positions, with one hop being performed at an interval of k0 transmissions among 8 repeated transmissions.

For example, when k0 takes values of 1 and 2, the frequency hopping pattern (pattern) can be as shown in fig. 7 and fig. 8, respectively. Fig. 7 and 8 both illustrate PUSCH retransmission of TypeA as an example. In fig. 7, 4 times of repeated transmissions can be performed in a slot, and adjacent repeated transmissions are all subjected to frequency hopping; and 8 times of repeated transmission is carried out in 2 slots, and the adjacent repeated transmission carries out frequency hopping. There are a maximum of 4 candidate hopping positions. In fig. 8, 4 times of repeated transmissions may be performed in a slot, and frequency hopping is performed by repeating the transmissions 2 times (i.e., in the case where H is 2); a total of 8 repeated transmissions are made in 2 slots, with frequency hopping occurring every 2 repeated transmissions. There are a maximum of 4 candidate hopping positions.

For example, the above assumption applies also to type b retransmission, which does not limit that the time domain position of PUSCH retransmission between slots must be the same as type a retransmission, and type b retransmission may be transmitted continuously across slot boundaries for multiple retransmissions. For example, when the value of k0 is 1 and 2, the frequency hopping pattern (pattern) when repeated transmission is performed on the PUSCH of TypeB may be as shown in fig. 9 and fig. 10, respectively. When multiple-repetition transmission is performed to continuously transmit across slot boundaries, the 5th repetition transmission as shown in fig. 9 and 10 may be divided into two repetition transmissions (the 5th repetition transmission becomes the 5th and 6 th repetition transmissions), so that the terminal device may actually perform 9 repetition transmissions, but the total number of time domain symbols occupied by the repetition transmissions does not change.

In the above illustrated example, it is described that the number of time domain symbols of the PUSCH at a single transmission is l_dWhen 3, 4 hopping positions can be hopped. Further, the number of time domain symbols of the PUSCH is/when a single transmission is made_dWhen the frequency is 4, the frequency hopping of 3 different frequency hopping positions can be carried out; or when the time domain symbol number of single transmission PUSCH is l_dWhen 5,6, and 7, 2 frequency hopping of different frequency domain positions can be performed. Besides the values of k0 are 1 and 2, k0 may have other values, such as 3, 4 … …, etc. The time domain symbols of the PUSCH transmitted at a single time are different, the values of k0 are different, and the frequency hopping mode types can be referred to each other, which is not listed in the application. The number of repeated transmissions k0 and the number N of hopping candidate positions that are not hopping continuously satisfy: mod (K, K0 × N) is 0, i.e., the number of repeated transmissions is an integer multiple of K0 × N.

By the above method, more hopping positions including uniform and non-uniform hopping offset (offset) are added when repeating transmission, and better frequency diversity gain can be achieved in a frequency selective fading channel.

Further, when performing the K times of repetitive transmission, the terminal device may perform the K times of repetitive transmission based on the frequency hopping manner or the frequency hopping rule. And the DMRS resources configured in at least two of the K repeated transmissions are different. Several possible examples of DMRS resources configured in K repeated transmissions are described in detail below.

In an alternative embodiment, the K repeated transmissions may include L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions includes N transmissions according to the N hopping positions, the last set of repeated transmissions of the K repeated transmissions includes M transmissions according to the N hopping positions, and M is less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K; wherein each set of repeated transmissions may also be referred to as repeated transmissions for each round of frequency hopping.

Wherein, the DMRS resource configured by the P group repeated transmission is different from the DMRS resource configured by the P +1 group repeated transmission; p is an integer greater than 1 and less than L; the configured DMRS resources may indicate one of: time-domain location of a preamble (front-loaded) DMRS in one repetition transmission; DMRS is not contained in one repeated transmission; a time-domain position of a preamble DMRS in one repetition transmission, and a time-domain position of an additional (additional) DMRS in one repetition transmission.

In one example, in the P-th group of repeated transmissions, the DMRS resource configured in each repeated transmission is a first DMRS resource; in the P +1 th group of repeated transmission, the DMRS resource configured in each repeated transmission is a second DMRS resource. That is, in this example, DMRS resources configured for all the repeated transmissions in the P-th group of repeated transmissions are the same, and DMRS resources configured for all the repeated transmissions in the P + 1-th group of repeated transmissions are the same.

For example, when the value of k0, which hops with 0 repetitions of the retransmission time interval, is 1, the number of time domain symbols/scheduled when a single repetition transmission is performed_dWhen 3, the DMRS resources configured for TypeA PUSCH frequency hopping based repeated transmission may be as shown in fig. 11. In fig. 11, the DMRS configured in each repetition transmission of the first round of frequency hopping (1 st to 4 th repetition transmissions) (which may also be referred to as P-th group repetition transmissions) is the first DMRS resource, and each repetition transmission exemplarily includes 1 front-loaded DMRS, that is, the first DMRS resource refers toThe time domain position of the front-loaded DMRS in the corresponding repeated transmission is shown; the DMRS configured in each repetition transmission in the second round of frequency hopping (5th to 8 th repetition transmissions) (which may also be referred to as P +1 th group repetition transmissions) is the second DMRS resource, and illustratively, each repetition transmission does not contain a DMRS, and the result of channel estimation at a different frequency domain position of the previous slot is multiplexed.

Specifically, in fig. 11, the time domain position of the DMRS resource indication configured in each repeated transmission in the first round of frequency hopping may be flexibly configured according to a predefined position, for example: the DMRS occupies a first time domain symbol, so that channel estimation can be performed more timely; or the DMRS can be placed at the position of the middle time domain symbol of the current scheduling, and the channels of other time domain symbols can be estimated more accurately; or the DMRS may be placed at the position of the last time domain symbol of the current scheduling, which is convenient for more accurately adapting to the channel estimation of the next slot (without DMRS) when estimating the channel in conjunction with the next slot.

For another example, when the value of k0, which hops with 0 repetitions of the retransmission time interval, is 1, the number of time domain symbols/scheduled for a single repetition transmission is_dWhen 4, the DMRS resources configured for TypeA PUSCH repeated transmission based on frequency hopping may be as shown in fig. 12. In fig. 12, the first DMRS resource may indicate that each repetitive transmission includes 1 front-loaded DMRS occupying one time-domain symbol (e.g., the first time-domain symbol), and the second DMRS resource may indicate that each repetitive transmission does not include a DMRS. And multiplexing the results of channel estimation of other slots when the DMRS is not contained in each repeated transmission.

For another example, when the value of k0, which hops with 0 repetitions of the retransmission time interval, is 1, the number of time domain symbols/scheduled for a single repetition transmission is_dWhen 5,6,7, DMRS resources configured for TypeA PUSCH repeated transmission based on frequency hopping may be as shown in fig. 13. In fig. 13, the first DMRS resource may indicate that each repeated transmission includes 1 front-loaded DMRS and 1 additional DMRS, which total 2 time domain symbols, for example, the front-loaded DMRS may occupy the first time domain symbol, and the additional DMRS may occupy any time domain symbol after the first time domain symbol; second DMRS resourceThe source may indicate that each repeated transmission does not contain a DMRS. And multiplexing the results of channel estimation of other slots when the DMRS is not contained in each repeated transmission.

For another example, when the value of k0, which hops with 0 repetitions of the retransmission time interval, is 1, the number of time domain symbols/scheduled for a single repetition transmission is_dWhen 5,6,7, DMRS resources configured for TypeA PUSCH repeated transmission based on frequency hopping may also be as shown in fig. 14. In fig. 14, the first DMRS resource may indicate that each repeated transmission includes 1 front-loaded DMRS and 1 additional DMRS, which total 2 time domain symbols, for example, the front-loaded DMRS may occupy the first time domain symbol, and the additional DMRS may occupy any time domain symbol after the first time domain symbol; the second DMRS resource may indicate that each repeated transmission contains 1 front-loaded DMRS occupying one time-domain symbol (e.g., may be the first time-domain symbol).

It should be noted that, when the DMRS resource indication configured in the above-mentioned repeated transmission includes a DMRS, a time domain symbol occupied by the DMRS may be not only one time domain symbol, but also a few time domain symbols are occupied. For example, the DMRS time domain position may be a previous time domain symbol, a middle time domain symbol, and a last time domain symbol occupying the current scheduled repetitive transmission, and may be flexibly configured, which is not limited in this application.

In particular, the above relates to_d＝3、l_d4 and l_dAs for the configured DMRS resources of 5,6, and 7, compared to the DMRS resources configured for repeated transmission in the existing protocol of table 1, the time-domain position of the DMRS in one repeated transmission may be indicated by the DMRS resources configured in table 2 by re-predefining the DMRS resources configured for the configuration in table 2.

TABLE 1

TABLE 2

In another example, the difference between the DMRS resources of the P-th group of repeated transmission configuration and the DMRS resources of the P + 1-th group of repeated transmission configuration may be: the repeated transmission at the first frequency domain position in the P-th group of repeated transmissions is configured with different DMRS resources than the repeated transmission at the first frequency domain position in the P + 1-th group of repeated transmissions. That is, in two consecutive sets of repeated transmissions, DMRS resources configured for repeated transmissions at the same frequency domain location are different.

For example, when the value of k0, which hops with 0 repetitions of the retransmission time interval, is 1, the number of time domain symbols/scheduled when a single repetition transmission is performed_dWhen 3, the DMRS resources configured for TypeA PUSCH frequency hopping based repeated transmission may be as shown in fig. 15. In fig. 15, two consecutive groups differ in DMRS resources configured for repeated transmission at the same frequency domain position (i.e., the same frequency hopping offset position). For example: the 1 st repetition transmission (set to be in the P-th group) and the 5th repetition transmission (set to be in the P + 1-th group) are configured such that the 1 st repetition transmission contains the DMRS and the 5th repetition transmission does not contain the DMRS at the same frequency domain position; the 2 nd repetition transmission (set to be in the P-th group) and the 6 th repetition transmission (set to be in the P + 1-th group) are arranged such that the 2 nd repetition does not include the DMRS and the 6 th repetition includes the DMRS at the same frequency domain position.

For another example, when the value of k0, which hops with 0 repetitions of the retransmission time interval, is 1, the number of time domain symbols/scheduled for a single repetition transmission is_dWhen 4, the DMRS resources configured for TypeA PUSCH repeated transmission based on frequency hopping may be as shown in fig. 16. In fig. 16, two consecutive groups differ in DMRS resources configured for repeated transmission at the same frequency domain position (i.e., the same frequency hopping offset position). For example: the 1 st repeated transmission (set to be in the P group) and the 4 th repeated transmission (set to be in the P +1 group) are configured in the same frequency domain position that the 1 st repeated transmission contains the DMRS and the 4 th repeated transmission does not contain the DMRS; 2 nd repetitionThe transmission (in the P-th group) and the 5-th repetition transmission (in the P + 1-th group) are arranged such that the 2-th repetition does not include the DMRS and the 5-th repetition includes the DMRS at the same frequency domain position.

For another example, when the value of k0, which hops with 0 repetitions of the retransmission time interval, is 1, the number of time domain symbols/scheduled for a single repetition transmission is_dWhen 5,6,7, the DMRS resources configured for TypeA PUSCH repeated transmission based on frequency hopping may be as shown in fig. 17 or fig. 18. In fig. 17 or fig. 18, two consecutive groups differ in DMRS resources configured for repeated transmission at the same frequency domain position (i.e., the same frequency hopping offset position). For example: in fig. 17, the 1 st repetition transmission (set to be in the P-th group) and the 3 rd repetition transmission (set to be in the P + 1-th group) are configured such that the 1 st repetition transmission contains 2 DMRSs and the 3 rd repetition transmission does not contain DMRSs at the same frequency domain position; in fig. 18, the 1 st repetition transmission (set to be in the P-th group) and the 3 rd repetition transmission (set to be in the P + 1-th group) are arranged such that the 1 st repetition contains 2 DMRSs and the 3 rd repetition contains 1 DMRS at the same frequency domain position. When any repetitive transmission includes a DMRS, the number of occupied time domain symbols and the start position (and/or end position) of the included DMRS is not limited in the present application.

It should be noted that, when the DMRS resource indication configured in the above-mentioned repeated transmission includes a DMRS, a time domain symbol occupied by the DMRS may be not only one time domain symbol, but also a few time domain symbols are not limited to be occupied. For example, the DMRS time domain position may be a previous time domain symbol, a time domain symbol, and a last time domain symbol occupying the current scheduled repetitive transmission, and may be flexibly configured, which is not limited in this application.

In particular, reference is made to l in the above examples_d＝3、l_d4 and l_dThe time domain position of DMRS in one repetition transmission may be indicated by the DMRS resources configured in table 2 by re-predefining the DMRS resources configured in table 3 as the DMRS resources configured in table 5,6, and 7.

TABLE 3

In an alternative embodiment, the K repeated transmissions may include L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions includes N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, and M is less than or equal to N; and L is an integer which is greater than or equal to 2 and less than or equal to K.

Wherein at least one of the L sets of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resource indicates one of: a time domain position of a preamble DMRS in one repeated transmission; DMRS is not contained in one repeated transmission; a time-domain position of the preamble DMRS in one repetition transmission, and a time-domain position of the additional DMRS in one repetition transmission.

In one example, the at least one of the L sets of repeated transmissions may specifically be configured to use at least two DMRS resources: the DMRS resources of the repetitive transmission configuration at least two different frequency domain locations in the at least one set of repetitive transmissions are different. That is, DMRS resources are jointly configured from dimensionally different repeated transmissions in the frequency hopping domain. For example: the DMRS resources configured for the 1 st repetition transmission are different from the DMRS resources configured for the 2 nd repetition transmission.

For example, DMRS resources of the repeated transmission configurations on at least two different frequency domain locations may also be different by at least one set of repeated transmissions shown in fig. 15-18. For example, in fig. 15, in the first set of repeated transmissions, the repeated transmission at the first frequency-domain position contains a DMRS, and the repeated transmission at the second frequency-domain position does not contain a DMRS; in fig. 16, in a first set of repeated transmissions, the repeated transmission at a first frequency-domain location contains a DMRS, and the repeated transmission at a second frequency-domain location does not contain a DMRS; in fig. 17, in a first set of repeated transmissions, the repeated transmission at a first frequency-domain position contains 2 DMRSs, and the repeated transmission at a second frequency-domain position does not contain a DMRS; in fig. 18, in the first set of repeated transmissions, the repeated transmission at the first frequency-domain position includes 2 DMRSs, and the repeated transmission at the second frequency-domain position includes 1 DMRS.

Further, fig. 15-18 above may show repeated transmission of the first round of frequency hopping, and DMRS resources are jointly configured for the repeated transmission at different frequency domain positions, for example: more DMRS-less DMRS-more DMRS; repeated transmission of the second round of frequency hopping, and multiple repeated transmissions in the same frequency domain position in the first round of frequency hopping jointly configure DMRS resources, for example: multiple DMRS-few DMRS-multiple DMRS. Fig. 15 to 18 show that DMRS resources allocated to repeated transmission within the same group are different from each other, and DMRS resources allocated to repeated transmission between two consecutive groups are different from each other.

In another alternative embodiment, each of the N frequency hopping positions corresponds to H (i.e., k0) consecutive repeated transmissions, where DMRS resources configured for at least two repeated transmissions in the H repeated transmissions are different; wherein H is an integer greater than or equal to 2, and K is greater than or equal to 2 times H. That is, frequency hopping is performed once every H times of repeated transmission, and consecutive H times of repeated transmission correspond to the same frequency hopping position.

In one example, the joint DMRS configuration is performed for H repeated transmissions of the same frequency hopping position, e.g.: in H times of repeated transmission, the front repeated transmission contains more DMRS, and the back repeated transmission contains less DMRS; or the middle repeated transmission contains more DMRS, and the front and back repeated transmissions contain less DMRS. That is, the DMRS resources configured for at least two repeated transmissions in H repeated transmissions are different.

For example, when H is 2, N is 4, the number of time domain symbols scheduled when a single repetition is transmitted is l_dWhen K is 8, the DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping may be as shown in fig. 19. In fig. 19, there are 2 retransmissions at the same hop location, 2 retransmissions followed by hopping, and 2 retransmissions at each hop location. DMRS resources configured in these 2 repeated transmissions are different: the 1 st repetition transmission corresponding to any frequency hopping position contains one DMRS, and the 2 nd repetition transmission does not contain the DMRS.

For another example, when H is 2, N is 3, the number of time domain symbols l scheduled when a single retransmission is performed_dWhen K is 8, DMRS resources configured for TypeA PUSCH repeated transmission based on frequency hopping may be as shown in fig. 20. In fig. 20, there are 3 retransmissions at the same hop location, 3 retransmissions followed by hopping, and 3 retransmissions at each hop location. DMRS resources configured for 2 repeated transmissions in the 3 repeated transmissions are different: the 1 st repeated transmission corresponding to any frequency hopping position contains one DMRS, the 2 nd repeated transmission does not contain the DMRS, and the 3 rd repeated transmission does not contain the DMRS, namely, the 1 st repeated transmission contains more DMRSs (for example, 1 DMRS), and the subsequent repeated transmission contains less DMRS (for example, no DMRS). In addition, the middle repeated transmission contains more DMRSs (such as 1 DMRS), the head-to-tail repeated transmission contains less DMRSs (such as no DMRSs), and the specific time domain positions of the DMRSs contained in the repeated transmission can be flexibly configured and are not shown in the figure.

For another example, when H is 2, N is 2, and the number of time domain symbols l scheduled for a single repeated transmission is l_dWhen K is 8, 6,7, 5, DMRS resources configured for repeated transmission of TypeA PUSCH based on frequency hopping may be as shown in fig. 21. In fig. 21, there are 2 retransmissions at the same hop location, 2 retransmissions followed by hopping, and 2 retransmissions at each hop location. DMRS resources configured in these 2 repeated transmissions are different: the 1 st repetition transmission corresponding to any frequency hopping position contains one DMRS, and the 2 nd repetition transmission does not contain the DMRS.

In the above example, the case of indicating DMRS resources in which the allocation of repeated transmission and frequency hopping is performed when TypeA repetition is performed is shown. Similarly, in TypeB retransmission, only a slot boundary is crossed when a slot needs to be crossed, and a previous single repeated transmission needs to be transmitted twice when the slot boundary is crossed, but the configuration of DMRS resources is not affected.

It should be noted that the above-mentioned examples are only examples of the case where DMRS resources configured in at least two repeated transmissions of the K repeated transmissions are different, and the DMRS resources configured in at least two repeated transmissions of the K repeated transmissions in the present application are not limited to be different. There are many other cases, for example, in the K-time repeated transmissions, in the 1 st to a-th repeated transmissions, the DMRS resource configured in each repeated transmission is the third DMRS resource, and in the a +1 st to K-th repeated transmissions, the DMRS resource configured in each repeated transmission is the fourth DMRS resource; the A is an integer greater than 1 or less than K, wherein the third or fourth DMRS resource may indicate one of: a time domain position of a preamble DMRS in one repeated transmission; DMRS is not contained in one repeated transmission; a time-domain position of the preamble DMRS in one repetition transmission, and a time-domain position of the additional DMRS in one repetition transmission. Of course, there are other various examples, as long as it is satisfied that DMRS resources configured in at least two of the K repeated transmissions are different, all of which may be included in the information transmission method of the present application. This application is not further enumerated.

By adopting the information transmission method provided by the embodiment of the application, DMRS resources can be flexibly configured for repeated transmission for many times, so that the performance gain of channel joint estimation can be obtained, and the transmission performance can be improved.

Based on the above embodiments, an information transmission apparatus is further provided in the embodiments of the present application, and referring to fig. 22, the information transmission apparatus 2200 may include a transceiver unit 2201 and a processing unit 2202. Among them, the transceiver 2201 is used for the information transmission apparatus 2200 to receive information (message or data) or transmit information (message or data), and the processing unit 2202 is used for controlling and managing the operation of the information transmission apparatus 2200. The processing unit 2202 may also control the steps performed by the transceiving unit 2201.

For example, the information transmission apparatus 2200 may be the network device in the foregoing embodiment, and specifically may be a processor, a chip or a chip system in the network device, or a functional module; alternatively, the information transmission apparatus 2200 may be the terminal device in the foregoing embodiment, and specifically may be a processor, a chip or a chip system in the terminal device, or a functional module.

In an embodiment, when the information transmission apparatus 2200 is used to implement the functions of the network device in the foregoing embodiments, the method may specifically include:

the processing unit 2202 is configured to determine first information indicating a DMRS resource configured in each of K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; k is an integer greater than or equal to 2; the transceiving unit 2201 is configured to send the first information to the terminal device.

In an optional implementation, the transceiver 2201 is further configured to: and sending second information to the terminal equipment, wherein the second information is used for indicating N frequency hopping positions in the K times of repeated transmission, and N is an integer greater than or equal to 2.

In one example, the second information indicates a hopping offset, which is used to determine the N hopping positions; the frequency hopping position during the ith repeated transmission is related to the number of time domain symbols occupied by one transmission, the total number of symbols of a time slot, i, the transmission times between two continuous frequency hopping and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K.

In another example, the second information indicates a plurality of hopping offsets, and the plurality of hopping offsets are used to determine the N hopping positions.

In an alternative embodiment, the K repeated transmissions include L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions includes N transmissions according to the N hopping positions, the last set of repeated transmissions of the K repeated transmissions includes M transmissions according to the N hopping positions, and M is less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

the DMRS resources configured for the P group of repeated transmission are different from the DMRS resources configured for the P +1 group of repeated transmission; p is an integer greater than 1 and less than L; the configured DMRS resource indicates one of: pre-locating a time domain position of the DMRS in one repeated transmission; DMRS is not contained in one repeated transmission; a time-domain position of the preamble DMRS in one repetition transmission, and a time-domain position of the additional DMRS in one repetition transmission.

Specifically, in the P-th group of repeated transmissions, the DMRS resource configured in each repeated transmission is a first DMRS resource; in the P +1 th group of repeated transmission, the DMRS resource configured in each repeated transmission is a second DMRS resource.

In another optional embodiment, the K repeated transmissions include L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions includes N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions includes M transmissions according to the N frequency hopping positions, and M is less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

at least one of the L sets of repeated transmissions uses at least two configured DMRS resources; the configured DMRS resource indicates one of: a time domain position of a preamble DMRS in one repeated transmission; DMRS is not contained in one repeated transmission; a time-domain position of the preamble DMRS in one repetition transmission, and a time-domain position of the additional DMRS in one repetition transmission.

Illustratively, the difference between the DMRS resources of the P-th group of repetitive transmission configurations and the DMRS resources of the P + 1-th group of repetitive transmission configurations includes: the repeated transmission at the first frequency domain position in the P-th group of repeated transmissions is configured with different DMRS resources than the repeated transmission at the first frequency domain position in the P + 1-th group of repeated transmissions.

Optionally, at least one of the L sets of repeated transmissions uses at least two DMRS resource configurations including: the DMRS resources of the repetitive transmission configuration at least two different frequency domain locations in the at least one set of repetitive transmissions are different.

In yet another optional implementation manner, each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, where DMRS resources configured for at least two repeated transmissions in the H repeated transmissions are different; wherein H is an integer greater than or equal to 2, and K is greater than or equal to 2 times H.

In another embodiment, when the information transmission apparatus 2200 is used to implement the functions of the terminal device in the foregoing embodiments, the method may specifically include:

the transceiving unit 2201 is configured to receive first information from a network device, where the first information is used to indicate demodulation reference symbol, DMRS, resources configured in K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; k is an integer greater than or equal to 2; the processing unit 2202 is configured to perform the K times of repeated transmission according to the DMRS resource configured for each time of repeated transmission in the first information.

In an optional implementation, the transceiver 2201 is further configured to: and receiving second information from the network equipment, wherein the second information is used for indicating N frequency hopping positions in the K times of repeated transmission, and N is an integer greater than or equal to 2.

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

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

In another information transmission apparatus provided in the embodiments of the present application, as shown in fig. 23, the information transmission apparatus 2300 may include a transceiver 2301 and a processor 2302. Optionally, the information transmission device 2300 may further include a memory 2303. The memory 2303 may be provided inside the information transmission device 2300, or may be provided outside the information transmission device 2300. The processor 2302 can control the transceiver 2301 to receive and transmit data or information, etc., among others.

Specifically, the processor 2302 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP. The processor 2302 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

The transceiver 2301, the processor 2302, and the memory 2303 are connected to each other. Optionally, the transceiver 2301, the processor 2302, and the memory 2303 are interconnected via a bus 2304; the bus 2304 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 23, but it is not intended that there be only one bus or one type of bus.

In an alternative embodiment, the memory 2303 may be used to store programs and the like. In particular, the program may include program code comprising computer operating instructions. The memory 2303 may include RAM, and may also include non-volatile memory (non-volatile memory), such as one or more disk memories. The processor 2302 executes the application program stored in the memory 2303 to implement the above-described functions, thereby implementing the functions of the information transmission device 2300.

Illustratively, the information transmission apparatus 2300 may be the network device or the terminal device.

In an embodiment, when the information transmission apparatus 2300 is used to implement the functions of the network device in the foregoing embodiments, the method may specifically include:

the processor 2302 is configured to determine first information indicating demodulation reference symbol, DMRS, resources configured in each of K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; k is an integer greater than or equal to 2; the transceiver 2301 is configured to transmit first information to the terminal device.

In an alternative embodiment, the transceiver 2301 is further configured to: and sending second information to the terminal equipment, wherein the second information is used for indicating N frequency hopping positions in the K times of repeated transmission, and N is an integer greater than or equal to 2.

In another embodiment, when the information transmission apparatus 2300 is used to implement the functions of the terminal device in the foregoing embodiments, the method may specifically include:

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

In an alternative embodiment, the transceiver 2301 is further configured to: and receiving second information from the network equipment, wherein the second information is used for indicating N frequency hopping positions in the K times of repeated transmission, and N is an integer greater than or equal to 2.

In addition, in the current scheme, in two adjacent repeated transmissions (i.e. transmissions), when frequency hopping is performed, because the frequency domain resource locations are different, for example, as shown in fig. 4, joint channel estimation cannot be performed. Based on this, the embodiment of the present application further provides an information transmission method, which can perform joint channel estimation on at least two adjacent repeated transmissions.

Specifically, a time domain granularity (i.e., the number of time slots included in a time domain unit) Z is defined in K times of repeated transmission, that is, the same frequency domain resource is used for 1-Z time slots, and the frequency domain resource after frequency hopping is used for Z + 1-2Z time slots. Illustratively, the terminal device performs inter-group (inter-group) frequency hopping based on one time domain granularity Z, each group (group) contains Z slots (slots), and the repeated transmission of Z slots within each group employs the same transmission power.

In an example, taking PUSCH repeated transmission as an example, assuming that the time domain granularity of configured inter-group frequency hopping is Z ═ 2, and when 4 times of repeated transmission are performed, a schematic diagram of a frequency hopping manner in which a terminal device repeatedly transmits according to a method in the prior art may be as shown in (a) in fig. 24, and a schematic diagram of a frequency hopping manner in which a terminal device repeatedly transmits by using the method provided in the embodiment of the present application may be as shown in (b) in fig. 24.

It can be seen that, in (a) of fig. 24, two adjacent repeated transmissions, for example, the 1 st and 2 nd repeated transmissions correspond to different frequency hopping positions, that is, corresponding frequency domain resources are different. In fig. 24 (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 1 st and 2 nd repeated transmissions correspond to the same frequency domain resources, and the 3 rd and 4 th repeated transmissions after frequency hopping correspond to the same frequency domain resources.

In fig. 24 (b), the repeated transmissions are divided into two groups, the 1 st and 2 nd repeated transmissions form one group, and the 3 rd and 4 th repeated transmissions form one group, so as to implement inter-group frequency hopping, and the transmission power of the two repeated transmissions in the same group may be the same, and the antenna ports transmitted by the terminal device may be the same, so that the network device may perform joint channel estimation and demodulation on the received uplink signal, which is helpful to improve the uplink performance.

In fig. 24, Z is merely taken as an example to be 2, and of course, Z may have other values, which are not listed here.

In one example, the frequency hopping position per repeat transmission of the prior art satisfied by (a) of fig. 24 can conform to the following equation five:

wherein the content of the first and second substances,

it indicates the slot number of the slot number,

is composed of

Corresponding frequency hopping position, RB_startFor the first hop position in repeated transmission, RB_offsetFor the offset of the frequency hopping,

the number of Resource Blocks (RBs) contained in a bandwidth part (BWP),

starting position RB indicating RB of current transmission schedule_startAt hopping intervals RB_offsetFrequency hopping to a new RB position RB_start+RB_offsetThe range of the current bandwidth portion BWP may be exceeded, so modulo rotation is performed to determine a new RB location, ensuring that the hopped RB location is still within the current BWP range.

Further, with the method provided by the embodiment of the present application, the frequency hopping position per repeated transmission satisfied by (b) of fig. 24 may conform to the following formula six:

by adopting the information transmission method provided by the embodiment of the application, a time domain granularity is introduced during repeated transmission, and frequency hopping among groups is carried out, so that joint channel estimation can be carried out on repeated transmission in the same group, and the transmission performance is improved.

Based on the above embodiments, the present application provides a communication system, which may include the network device and the terminal device related to the above embodiments.

The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium is used for storing a computer program, and when the computer program is executed by a computer, the computer may implement the information transmission method provided by the above method embodiment.

The embodiment of the present application further provides a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer may implement the information transmission method provided by the foregoing method embodiment.

The embodiment of the application also provides a chip, wherein the chip is coupled with the memory and is used for realizing the information transmission method provided by the embodiment of the method.

The embodiment of the present application further provides a chip system, where the chip system includes a processor, and is configured to support the information transmission apparatus to implement the above-mentioned related functions. Optionally, the chip system further comprises a memory for storing program instructions and data necessary for the information transmission device. The chip system may be constituted by a chip, or may include a chip and other discrete devices.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may 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, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

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

Claims

1. An information transmission method, comprising:

the network equipment determines first information, wherein the first information is used for indicating demodulation reference symbol (DMRS) resources configured in each repeated transmission in K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; k is an integer greater than or equal to 2;

the network device sends first information to the terminal device.

2. The method of claim 1, wherein the method further comprises:

and the network equipment sends second information to the terminal equipment, wherein the second information is used for indicating N frequency hopping positions during the K times of repeated transmission, and N is an integer greater than or equal to 2.

3. The method of claim 2, wherein the second information indicates a hop offset, the hop offset being used to determine the N hop positions;

the frequency hopping position during the ith repeated transmission is related to the number of time domain symbols occupied by one transmission, the total number of symbols of a time slot, i, the transmission times between two continuous frequency hopping and the frequency hopping offset; wherein i is an integer greater than or equal to 1 and less than or equal to K.

4. The method of claim 2, wherein the second information indicates a plurality of hop offsets, the plurality of hop offsets used to determine the N hop positions.

5. The method of any of claims 2-4, wherein the K repeated transmissions comprise L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions comprising N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions comprising M transmissions according to the N frequency hopping positions, M being less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

6. The method of claim 5, wherein in the P-th group of repeated transmissions, the DMRS resource configured in each repeated transmission is a first DMRS resource; in the P +1 th group of repeated transmission, the DMRS resource configured in each repeated transmission is a second DMRS resource.

7. The method of any of claims 2-5, wherein the K repeated transmissions comprise L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions comprising N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions comprising M transmissions according to the N frequency hopping positions, M being less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

8. The method of claim 5, wherein the P-th set of repetitive transmission configured DMRS resources being different from the P + 1-th set of repetitive transmission configured DMRS resources comprises:

the repeated transmission at the first frequency domain position in the P-th group of repeated transmissions is configured with different DMRS resources than the repeated transmission at the first frequency domain position in the P + 1-th group of repeated transmissions.

9. The method of claim 7, wherein at least one of the L sets of repeated transmissions uses at least two DMRS resource configurations comprising:

the DMRS resources of the repetitive transmission configuration at least two different frequency domain locations in the at least one set of repetitive transmissions are different.

10. The method of any one of claims 2-5, wherein each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, at least two of the H repeated transmissions having different DMRS resources; wherein H is an integer greater than or equal to 2, and K is greater than or equal to 2 times H.

11. An information transmission method, comprising:

the terminal equipment receives first information from network equipment, wherein the first information is used for indicating demodulation reference symbol (DMRS) resources configured in K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; k is an integer greater than or equal to 2;

and the terminal equipment performs the repeated transmission for K times according to the DMRS resource configured by the repeated transmission for each time in the first information.

12. The method of claim 11, wherein the method further comprises:

and the terminal equipment receives second information from the network equipment, wherein the second information is used for indicating N frequency hopping positions during the K times of repeated transmission, and N is an integer greater than or equal to 2.

13. The method of claim 12, wherein the second information indicates a hop offset, the hop offset being used to determine the N hop positions;

14. The method of claim 12, wherein the second information indicates a plurality of hop offsets used to determine the N hop positions.

15. The method of any of claims 12-14, wherein the K repeated transmissions comprise L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions comprising N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions comprising M transmissions according to the N frequency hopping positions, M being less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

16. The method of claim 15, wherein in the P-th group of repeated transmissions, the DMRS resource configured in each repeated transmission is a first DMRS resource; in the P +1 th group of repeated transmission, the DMRS resource configured in each repeated transmission is a second DMRS resource.

17. The method of any one of claims 12-15, wherein the K repeated transmissions comprise L sets of repeated transmissions, each of the first L-1 sets of repeated transmissions of the K repeated transmissions comprising N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions comprising M transmissions according to the N frequency hopping positions, M being less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

18. The method of claim 15, wherein the P-th set of repetitive transmission configured DMRS resources different than the P + 1-th set of repetitive transmission configured DMRS resources comprises:

19. The method of claim 17, wherein at least one of the L sets of repeated transmissions uses at least two DMRS resource configurations comprising:

20. The method of any one of claims 12-15, wherein each of the N hopping positions corresponds to H consecutive repeated transmissions, at least two of the H repeated transmissions having different DMRS resources; wherein H is an integer greater than or equal to 2, and K is greater than or equal to 2 times H.

21. An information transmission apparatus, comprising:

the device comprises a processing unit and a sending unit, wherein the processing unit is used for determining first information which is used for indicating demodulation reference symbol (DMRS) resources configured in each repeated transmission in K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; k is an integer greater than or equal to 2;

and the transceiving unit is used for sending the first information to the terminal equipment.

22. The apparatus as recited in claim 21, wherein said transceiver unit is further configured to:

and sending second information to the terminal equipment, wherein the second information is used for indicating N frequency hopping positions in the K times of repeated transmission, and N is an integer greater than or equal to 2.

23. The apparatus of claim 22, wherein the second information indicates a hop offset, the hop offset being used to determine the N hop positions;

24. The apparatus of claim 22, wherein the second information indicates a plurality of hop offsets used to determine the N hop positions.

25. The apparatus of any one of claims 22-24, wherein the K repeated transmissions comprise L sets of repeated transmissions, each of a first L-1 set of repeated transmissions of the K repeated transmissions comprising N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions comprising M transmissions according to the N frequency hopping positions, M being less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

26. The apparatus of claim 25, wherein in the P-th group of repeated transmissions, the DMRS resource configured in each repeated transmission is a first DMRS resource; in the P +1 th group of repeated transmission, the DMRS resource configured in each repeated transmission is a second DMRS resource.

27. The apparatus of any one of claims 22-25, wherein the K repeated transmissions comprise L sets of repeated transmissions, each of a first L-1 set of repeated transmissions of the K repeated transmissions comprising N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions comprising M transmissions according to the N frequency hopping positions, M being less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

28. The apparatus of claim 25, wherein the P-th set of repetitive transmission configured DMRS resources different than the P + 1-th set of repetitive transmission configured DMRS resources comprises:

29. The apparatus of claim 27, wherein at least one of the L sets of repeated transmissions uses at least two DMRS resource configurations comprises:

30. The apparatus of any one of claims 22-25, wherein each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, at least two of the H repeated transmissions having different DMRS resources; wherein H is an integer greater than or equal to 2, and K is greater than or equal to 2 times H.

31. An information transmission apparatus, comprising:

a transceiving unit, configured to receive first information from a network device, where the first information is used to indicate demodulation reference symbol, DMRS, resources configured in K repeated transmissions; the DMRS resources configured in at least two repeated transmissions in the K repeated transmissions are different; wherein the configured DMRS resources indicate a time-domain location of the DMRS in one repetition transmission; k is an integer greater than or equal to 2;

and the processing unit is used for performing the repeated transmission for the K times according to the DMRS resource configured in the repeated transmission for each time in the first information.

32. The apparatus as recited in claim 31, said transceiver unit to further:

and receiving second information from the network equipment, wherein the second information is used for indicating N frequency hopping positions in the K times of repeated transmission, and N is an integer greater than or equal to 2.

33. The apparatus of claim 32, wherein the second information indicates a hop offset, the hop offset being used to determine the N hop positions;

34. The apparatus of claim 32, wherein the second information indicates a plurality of hop offsets used to determine the N hop positions.

35. The apparatus of any one of claims 32-34, wherein the K repeated transmissions comprise L sets of repeated transmissions, each of a first L-1 set of repeated transmissions of the K repeated transmissions comprising N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions comprising M transmissions according to the N frequency hopping positions, M being less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

36. The apparatus of claim 35, wherein in the P-th group of repeated transmissions, the DMRS resources configured in each repeated transmission are first DMRS resources; in the P +1 th group of repeated transmission, the DMRS resource configured in each repeated transmission is a second DMRS resource.

37. The apparatus of any one of claims 32-35, wherein the K repeated transmissions comprise L sets of repeated transmissions, each of a first L-1 set of repeated transmissions of the K repeated transmissions comprising N transmissions according to the N frequency hopping positions, a last set of repeated transmissions of the K repeated transmissions comprising M transmissions according to the N frequency hopping positions, M being less than or equal to N; l is an integer which is greater than or equal to 2 and less than or equal to K;

38. The apparatus of claim 35, wherein the P-th set of repetitive transmission configured DMRS resources different than the P + 1-th set of repetitive transmission configured DMRS resources comprises:

39. The apparatus of claim 37, wherein at least one of the L sets of repeated transmissions uses at least two DMRS resource configurations comprising:

40. The apparatus of any one of claims 32-35, wherein each of the N frequency hopping positions corresponds to H consecutive repeated transmissions, at least two of the H repeated transmissions having different DMRS resources; wherein H is an integer greater than or equal to 2, and K is greater than or equal to 2 times H.

41. A computer-readable storage medium, characterized in that it stores program instructions which, when run on a device, cause the device to perform the method of any of claims 1 to 20.