WO2021232321A1

WO2021232321A1 - Method for determining demodulation reference signal resource, and terminal device and network device

Info

Publication number: WO2021232321A1
Application number: PCT/CN2020/091414
Authority: WO
Inventors: 贺传峰
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-11-25
Also published as: CN115428375A

Abstract

Disclosed are a method for determining a demodulation reference signal resource, and a terminal device and a network device. The method comprises: a terminal device determining a plurality of symbols according to the number of instances of channel transmission and time-domain resource allocation information, wherein the plurality of symbols include at least one symbol from among symbols corresponding to at least two instances of transmission; and the terminal device determining the position of a demodulation reference signal (DMRS) in the plurality of symbols. By means of the embodiments of the present application, DMRS overheads can be reduced, and the utilization rate of time-domain resources can be improved.

Description

Method for determining demodulation reference signal resources, terminal equipment and network equipment

Technical field

This application relates to the field of communications, and more specifically, to a method for determining demodulation reference signal resources, terminal equipment, and network equipment.

Background technique

In the channel repetition in the prior art, the time domain resource allocation for each transmission is the same. The corresponding demodulation reference signal (DMRS, Demodulation Reference Signal) resource is also a time domain resource that is determined separately for each transmission. For example, for multiple transmissions of the Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel), DMRS time domain resources are separately configured for each transmission, which leads to low resource utilization; especially when the number of symbols transmitted each time is relatively small. The overhead of DMRS is relatively large.

Summary of the invention

The embodiments of the present application provide a method for determining DMRS resources, terminal equipment, and network equipment, which can reduce the overhead of DMRS and improve the utilization of time domain resources.

The application embodiment provides a method for determining demodulation reference signal resources, including:

The terminal device determines multiple symbols according to the number of channel transmissions and time domain resource allocation information, where the multiple symbols include at least one symbol of the symbols corresponding to at least two transmissions;

The terminal device determines the position of the demodulation reference signal DMRS in the multiple symbols.

An embodiment of the present application provides a method for determining a demodulation reference signal resource, including:

The network device determines multiple symbols according to the number of channel transmissions and time domain resource allocation information, where the multiple symbols include at least one symbol of symbols corresponding to at least two transmissions;

The network device determines the position of the demodulation reference signal DMRS in the multiple symbols.

The embodiment of the present application provides a terminal device, including:

The first symbol determining module is configured to determine multiple symbols according to the number of channel transmissions and time domain resource allocation information, and the multiple symbols include at least one symbol of symbols corresponding to at least two transmissions;

The first position determining module is used to determine the position of the demodulation reference signal DMRS in the multiple symbols.

The embodiment of the present application provides a network device, including:

The second symbol determining module is configured to determine multiple symbols according to the number of channel transmissions and time domain resource allocation information, and the multiple symbols include at least one symbol of symbols corresponding to at least two transmissions;

The second position determining module is used to determine the position of the demodulation reference signal DMRS in the multiple symbols.

An embodiment of the present application provides a terminal device, including: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and perform the determination of the first DMRS resource as described above Any of the methods.

An embodiment of the present application provides a network device, including: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and perform the determination of the second DMRS resource as described above Any of the methods.

An embodiment of the present application provides a chip, including a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes any one of the above-mentioned first method for determining DMRS resources.

The embodiment of the present application provides a chip, including: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes any one of the above-mentioned second method for determining DMRS resources .

The embodiment of the present application provides a computer-readable storage medium for storing a computer program that enables a computer to execute any one of the above-mentioned first method for determining DMRS resources.

The embodiment of the present application provides a computer-readable storage medium for storing a computer program that enables a computer to execute any one of the above-mentioned second method for determining DMRS resources.

The embodiments of the present application provide a computer program product, including computer program instructions, which cause a computer to execute any one of the above-mentioned first method for determining DMRS resources.

The embodiments of the present application provide a computer program product, including computer program instructions, which cause a computer to execute any one of the above-mentioned second method for determining DMRS resources.

An embodiment of the present application provides a computer program that enables a computer to execute any one of the above-mentioned first method for determining DMRS resources.

The embodiment of the present application provides a computer program that enables a computer to execute any one of the above-mentioned second method for determining DMRS resources.

In the embodiment of the present application, by determining the position of the DMRS resource in multiple symbols corresponding to at least two transmissions, the setting of the DMRS symbol can be more reasonable, thereby reducing the overhead of the DMRS and improving the utilization of time domain resources.

Description of the drawings

Fig. 1 is a schematic diagram of an application scenario of an embodiment of the present application.

Fig. 2 is an implementation flow chart of a method 200 for determining DMRS resources according to an embodiment of the present application.

FIG. 3 is a schematic diagram of PUSCH transmission symbols according to Embodiment 1 of the present application.

Fig. 4 is a schematic diagram of PUSCH DMRS symbol positions determined according to the prior art.

FIG. 5 is a schematic diagram of the position of a PUSCH DMRS symbol determined according to Embodiment 1 of the present application.

FIG. 6 is a schematic diagram of PUSCH transmission symbols according to Embodiment 2 of the present application.

FIG. 7 is a schematic diagram of the position of a PUSCH DMRS symbol determined according to Embodiment 3 of the present application.

FIG. 8 is a schematic diagram of the position of a PUSCH DMRS symbol determined according to Embodiment 3 of the present application.

FIG. 9 is a schematic diagram of a PUSCH transmission symbol position determined according to Embodiment 5 of the present application.

Fig. 10 is a flowchart of a method 1000 for determining DMRS resources according to an embodiment of the present application.

FIG. 11 is a schematic structural diagram of a terminal device 1100 according to an embodiment of the present application.

FIG. 12 is a schematic structural diagram of a network device 1200 according to an embodiment of the present application.

FIG. 13 is a schematic structural diagram of a network device 1300 according to an embodiment of the present application.

FIG. 14 is a schematic structural diagram of a communication device 1400 according to an embodiment of the present application.

FIG. 15 is a schematic structural diagram of a chip 1500 according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

It should be noted that the terms "first", "second", etc. in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. order. The objects described by "first" and "second" described at the same time may be the same or different.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) unlicensed spectrum, NR-U) system, universal mobile telecommunication system (UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, WiFi), next-generation communications (5th-Generation) , 5G) system or other communication systems, etc.

Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communication, but also support, for example, Device to Device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (MTC), and vehicle to vehicle (V2V) communication, etc. The embodiments of this application can also be applied to these communications system.

Optionally, the communication system in the embodiments of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, can also be applied to a dual connectivity (DC) scenario, and can also be applied to a standalone (SA) deployment. Network scene.

The embodiment of the application does not limit the applied frequency spectrum. For example, the embodiments of this application can be applied to licensed spectrum or unlicensed spectrum.

The embodiments of this application describe various embodiments in combination with network equipment and terminal equipment. The terminal equipment may also be referred to as User Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, and remote. Station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc. The terminal device can be a station (STAION, ST) in the WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, and personal digital processing (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, and next-generation communication systems, such as terminal devices in the NR network or Terminal equipment in the public land mobile network (PLMN) network that will evolve in the future.

As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets and smart jewelry for physical sign monitoring.

A network device can be a device used to communicate with mobile devices. The network device can be an access point (AP) in WLAN, a base station (BTS) in GSM or CDMA, or a device in WCDMA. A base station (NodeB, NB), can also be an Evolutional Node B (eNB or eNodeB) in LTE, or a relay station or an access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in the NR network Or network equipment in the PLMN network that will evolve in the future.

In the embodiment of the present application, the network equipment provides services for the cell, and the terminal equipment communicates with the network equipment through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network equipment (for example, The cell corresponding to the base station. The cell can belong to a macro base station or a base station corresponding to a small cell. The small cell here can include: Metro cell, Micro cell, Pico Cells, Femto cells, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

Figure 1 exemplarily shows one network device 110 and two terminal devices 120. Optionally, the wireless communication system 100 may include multiple network devices 110, and the coverage of each network device 110 may include other numbers. The terminal device 120 is not limited in this embodiment of the application. The embodiments of the present application can be applied to one terminal device 120 and one network device 110, and can also be applied to one terminal device 120 and another terminal device 120.

Optionally, the wireless communication system 100 may also include other network entities such as mobility management entities (Mobility Management Entity, MME), access and mobility management functions (Access and Mobility Management Function, AMF), etc. This is not limited.

It should be understood that the terms "system" and "network" in this article are often used interchangeably in this article. The term "and/or" in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

In the channel repetition in the prior art, the time domain resource allocation for each transmission is the same. The corresponding DMRS resource is also a time domain resource that is determined separately for each transmission. For example, the transmission of the Physical Downlink Shared Channel (PDSCH) includes the transmission of DMRS, which is used by the terminal to demodulate the PDSCH. The time-frequency resource of the DMRS is within the scheduling resource range of the PDSCH, and the PDSCH does not occupy the symbol where the DMRS is carried. The time-frequency domain resource location of the DMRS is configured through high-level parameters.

The time domain resource location of PDSCH DMRS includes front loaded DMRS and additional DMRS. The time domain position of the pre-DMRS is related to the PDSCH mapping type. For PDSCH mapping type A, the time domain position of the preceding DMRS is determined by the high-level parameter dmrs-TypeA-Position, dmrs-TypeA-Position='pos2'and'pos3' respectively represent the first symbol position of the preceding DMRS l ₀ = The reference point of 2 and 3, l is the start symbol of the time slot. For PDSCH mapping type B, the first symbol position l ₀ =0 of the preceding DMRS, and the reference point of l is the start symbol of the scheduled PDSCH. The additional DMRS is configured by the high-level parameter dmrs-AdditionalPosition. The dmrs-AdditionalPosition may indicate the additional DMRS position={pos0, pos1, pos3}. When the dmrs-AdditionalPosition is not configured, the additional DMRS position=pos2. At the same time, the pre-DMRS is also divided into two types, single-symbol and double-symbol, indicating whether the number of symbols included in the DMRS is one, one, or two. If the high-level parameter maxLength is not configured, it is of single type. If the high-level parameter maxLength is configured, it is determined whether it is single or double according to the instructions of the DCI.

Table 1 is a corresponding table of PDSCH DMRS symbol positions. For example, for PDSCH mapping type A, when l _d =12, if dmrs-AdditionalPosition is configured as pos2, the symbol where the DMRS is located includes the symbol where the preceding DMRS is located and the

symbols

6 and 9 where the additional DMRS is located.

Table 1

PUSCH DMRS also includes pre-DMRS and additional DMRS, and its time domain and frequency domain position configuration method is similar to PDSCH DMRS. Table 2 is the corresponding table of PUSCH DMRS symbol positions.

Table 2

In the NR system, in order to support ultra-reliable and low latency (ultra-reliable and low latency communication, URLLC) services, repeated uplink data transmission is used to improve transmission reliability. PUSCH repetitive transmission includes two types: PUSCH repetition Type A and PUSCH repetition Type B. The PUSCH repetition type is determined by high-layer signaling instructions. For PUSCH repetition Type A and Type B, the PUSCH time domain resource allocation method is different:

-PUSCH repetition Type A: The start symbol S of the PUSCH and the number of consecutive symbols L starting from the symbol S are determined by the start length indicator (SLIV, the start and length indicator) indicated in the PDCCH.

-PUSCH repetition Type B: The start symbol S of the PUSCH and the number of consecutive symbols L starting from the symbol S are respectively determined by the start symbol (startSymbol) and length (length) information corresponding to the row in the time domain resource allocation table.

For PUSCH repetition Type A, the UE repeatedly transmits the same transport block in consecutive K time slots. The symbol allocation in each time slot is the same, that is, the symbol allocation in the time slot indicated by startSymbolAndLength. For PUSCH repetition Type B, K transmissions of PUSCH _{start at the symbol S of the time slot K s} and are transmitted on consecutive K·L symbols, and each transmission contains L symbols. In PUSCH transmission in the prior art, the time domain resource allocation for each transmission is the same. The corresponding DMRS also determines the time domain resource separately for each transmission. For multiple transmissions of PUSCH, DMRS time domain resources are configured separately for each transmission, and resource utilization is not high, especially when the number of symbols transmitted each time is relatively small, the overhead of DMRS is relatively large. Other channel transmissions in the prior art, such as PDSCH or Physical Uplink Control Channel (PUCCH, Physical Uplink Control CHannel), may also have similar problems.

An embodiment of the present application proposes a method for determining DMRS resources. FIG. 2 is an implementation flowchart of a method 200 for determining DMRS resources according to an embodiment of the present application. The method may optionally be applied to the system shown in FIG. 1, but It's not limited to this. The method includes at least part of the following content.

S210: The terminal device determines multiple symbols according to the number of channel transmissions and time domain resource allocation information, where the multiple symbols include at least one symbol of the symbols corresponding to at least two transmissions;

S220: The terminal device determines the position of the DMRS in the multiple symbols.

In some embodiments, the symbols corresponding to the foregoing transmission include symbols allocated by time domain resource allocation information for each repeated transmission of the channel. For example, the time slot resource allocation information indicates the start symbol S of channel transmission and the number of consecutive symbols L starting from the start symbol S, the number of channel transmissions is K, and the channel of the terminal device repeatedly transmits the symbol S in the time slot Ks. Initially, it is transmitted on consecutive K·L symbols, and each transmission contains L symbols ("·" indicates a multiplication sign). Step S210 determines multiple symbols according to the number of channel transmissions and time domain resource allocation information. The multiple symbols include symbols corresponding to at least two transmissions, including valid symbols and invalid symbols, or only valid symbols.

Optionally, the above-mentioned valid symbols include symbols used for transmission on the channel, and the above-mentioned invalid symbols include symbols not used for transmission on the channel. For example, a valid symbol refers to a symbol actually used for transmission on the channel; an invalid symbol refers to a symbol that is allocated for transmission on the channel but is indicated as a downlink signal, or is indicated as an invalid symbol by a high-level parameter (such as InvalidSymbolPattern), etc. The symbols actually used for transmission on this channel. In some implementations, the invalid symbol is determined by the indication information of the network device, and the invalid symbol is related to the time domain resource allocation of the channel, for example, the invalid symbol belongs to a part of the symbols indicated in the time domain resource allocation information of the channel.

The multiple symbols determined above may have multiple forms: for example, the multiple symbols include K·L symbols corresponding to the channel repeated transmission of the terminal device; for another example, the multiple symbols include the channel repeated transmission of the terminal device. Part of the symbols in K·L symbols; for another example, the multiple symbols include K·L effective symbols from the start position of the first channel repetitive transmission; for another example, the multiple symbols include The K·L valid symbols from the starting position of the channel repeated transmission, and the invalid symbols existing between the first valid symbol and the last valid symbol.

In some embodiments, the above step S220 includes:

Determine the position of the DMRS in the above-mentioned multiple symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the first correspondence between the number of symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.

The aforementioned DMRS may include a pre-DMRS, or a pre-DMRS and an additional DMRS.

In the foregoing manner, the embodiment of the present application determines the symbol position of the DMRS in the multiple symbols. Optionally, the above-mentioned predefined rule includes the symbol position of the preceding DMRS and the interval between DMRS; according to the predefined rule, the terminal device can determine the symbol position of the preceding DMRS among the above-mentioned multiple symbols, and follow the interval The symbol position where the additional DMRS is located and the number of additional DMRS are determined among the above-mentioned multiple symbols. For example, the predefined rule includes: the symbol position of the pre-DMRS is 0, and the interval between DMRS is 5 symbols. When determining the position of the DMRS in 28 symbols, multiple DMRSs can be determined according to the aforementioned predefined rules, and the positions of each DMRS in the 28 symbols are: 0, 5, 10, 15, 20, and 25, respectively. It includes a pre-DMRS and 5 additional DMRS.

In some embodiments, the first correspondence between the DMRS symbol positions includes the correspondence between the DMRS symbol positions and the number of symbols and configuration parameters included in the multiple symbols. For example, when the number of symbols is 16, and the configuration parameter dmrs-AdditionalPosition='pos2', the corresponding symbol positions of the DMRS are l ₀ , 5, and 10, where l ₀ is the symbol position of the preceding DMRS, and the value of _{l 0 can be} It is 0; 5 and 10 are the symbol positions of additional DMRS. According to the first correspondence, after determining the number of symbols included in the multiple symbols and receiving the configuration parameters, the terminal device can determine the position of the DMRS in the multiple symbols. The specific values and parameters in the foregoing first correspondence are only examples, and the embodiments of the present application do not limit this.

This embodiment is applicable to the case where the above-mentioned multiple symbols include valid symbols and invalid symbols, and it is also applicable to the case where the above-mentioned multiple symbols include only valid symbols.

In the case where the multiple symbols described above include valid symbols and invalid symbols, the embodiment of the present application also proposes a way to determine the position of the DMRS in the multiple symbols. Optionally, when the foregoing multiple symbols include valid symbols and invalid symbols, the foregoing step S220 includes:

Determine the position of the DMRS in the valid symbols among the above-mentioned multiple symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the second correspondence between the number of effective symbols included in the plurality of symbols, the configuration parameters, and the position of the DMRS symbol.

In the foregoing manner, the embodiment of the present application determines the symbol position of the DMRS among the valid symbols included in the multiple symbols. Optionally, the above-mentioned predefined rule includes the symbol position of the preceding DMRS and the interval between DMRS; according to the predefined rule, the terminal device can determine the symbol position of the preceding DMRS among the valid symbols of the above-mentioned multiple symbols, and According to the interval, the symbol position of the additional DMRS in the valid symbol and the number of the additional DMRS are determined in the valid symbol. For example, the predefined rule includes: the symbol position of the pre-DMRS is 0, and the interval between DMRS is 5 symbols. The above 28 symbols include 24 valid symbols to determine the position of the DMRS in the valid symbols; multiple DMRS can be determined according to the aforementioned predefined rules, and the positions of each DMRS in the 24 valid symbols are: 0, 5, 10 , 15, 20. It includes a pre-DMRS and 4 additional DMRS. Since the position of the effective symbol in the plurality of symbols is determined, the position of the DMRS in the plurality of symbols can be determined.

In some embodiments, the second correspondence between the DMRS symbol position includes the correspondence between the DMRS symbol position and the number of valid symbols and configuration parameters included in the multiple symbols. For example, in 28 symbols, the number of valid symbols is 24, and the configuration parameter dmrs-AdditionalPosition='pos2', the corresponding DMRS symbol positions are l ₀ , 5, 10, 15, 20, where l ₀ is the previous Set the symbol position of the DMRS, _{the value of l 0} can be 0; 5, 10, 15, 20 are the positions of the additional DMRS in the effective symbol. According to the second correspondence, after determining the number of valid symbols contained in the multiple symbols and receiving the configuration parameters, the terminal device can determine the position of the DMRS in the valid symbols of the multiple symbols; The positions in the multiple symbols are determined, and the positions of the DMRS in the multiple symbols can be determined. It should be understood that the specific values and parameters in the aforementioned second correspondence are only examples, and the embodiments of the present application do not limit this.

The embodiment of the present application may also group the above-mentioned multiple symbols, and determine the position of the DMRS in each symbol group. specifically:

In some embodiments, the above step S220 includes:

Divide the above multiple symbols into at least two symbol groups;

Determine the position of the DMRS in each symbol group according to predefined rules; and/or, determine the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, configuration parameters, and the third correspondence of DMRS symbol positions Location.

In some embodiments, the number of symbols in the above-mentioned symbol group is the same or different. Each symbol group contains at least one symbol among the symbols corresponding to at least two transmissions.

In the foregoing manner, the embodiment of the present application determines the symbol position of the DMRS among the symbols included in each symbol group. Optionally, the above-mentioned predefined rule includes the symbol position of the preceding DMRS and the interval between DMRS; according to the predefined rule, the terminal device can determine the symbol position of the preceding DMRS among the symbols contained in the symbol group, and follow the The interval determines the symbol position of the additional DMRS and the number of additional DMRS in the symbol group. For example, the predefined rule includes: the symbol position of the pre-DMRS is 0, and the interval between DMRS is 5 symbols. If a symbol group contains 12 matches, according to the aforementioned predefined rules, it can be determined that the positions of the DMRS in the symbol group are: 0, 5, and 10, respectively. Including a pre-DMRS and 2 additional DMRS. In the same way, the position of the DMRS in each symbol group is determined separately, and the position information in all the symbol groups is integrated to determine the position of the DMRS in the above-mentioned multiple symbols.

In some embodiments, the third correspondence between the DMRS symbol positions includes the correspondence between the DMRS symbol positions and the number of symbols and configuration parameters included in the symbol group. For example, when the symbol group contains 14 symbols and the configuration parameter dmrs-AdditionalPosition='pos2', the corresponding symbol positions of the DMRS are l ₀ , 7, 11, where l ₀ is the symbol position of the preceding DMRS and the value of _{l 0} It can be 0; 7, 11 is the position of the additional DMRS in the symbol group. According to the third correspondence, after determining the number of symbols contained in the symbol group and receiving the configuration parameters, the terminal device can determine the position of the DMRS in the symbol group; combine the position information in all the symbol groups , You can determine the position of the DMRS in the above-mentioned multiple symbols. It should be understood that the specific values and parameters in the foregoing third correspondence are only examples, and the embodiments of the present application do not limit this. In the case that the number of symbol groups does not exceed the predetermined threshold, the embodiment of the present application may also adopt the DMRS symbol position correspondence relationship in the prior art, for example, the PUSCH DMRS symbol position correspondence table shown in Table 2 to determine where the DMRS is The position in the symbol group.

In some embodiments, when the plurality of symbols include valid symbols and invalid symbols, the foregoing step S220 includes:

Divide the valid symbols in the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each symbol group according to predefined rules; and/or, determine the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, configuration parameters, and the fourth correspondence between the DMRS symbol positions Location.

The aforementioned DMRS may include a pre-DMRS, or a pre-DMRS and an additional DMRS. Optionally, the number of symbols in the above-mentioned symbol groups is the same or different, and each symbol group includes at least one symbol of the symbols corresponding to at least two transmissions.

In the foregoing manner, the embodiment of the present application groups the effective symbols included in the multiple symbols, and determines the symbol position of the DMRS among the symbols (including only the effective symbols) included in each symbol group. Optionally, the above-mentioned predefined rule includes the symbol position of the preceding DMRS and the interval between DMRS; according to the predefined rule, the terminal device can determine the symbol position of the preceding DMRS among the symbols contained in the symbol group, and follow the The interval determines the symbol position of the additional DMRS and the number of additional DMRS in the symbol group. For example, the predefined rule includes: the symbol position of the pre-DMRS is 0, and the interval between DMRS is 5 symbols. If a symbol group contains 12 symbols, according to the aforementioned predefined rules, it can be determined that the positions of the DMRS in the symbol group are 0, 5, and 10, respectively. Including a pre-DMRS and 2 additional DMRS. In the same way, the position of the DMRS in each symbol group is determined separately, and the position information of the DMRS in all the symbol groups is integrated, and the position of the DMRS in all the symbol groups mentioned above can be determined; because of the validity contained in the symbol group The positions of the symbols in the above-mentioned multiple symbols are determined, so the positions of the DMRS in the above-mentioned multiple symbols can be determined.

In some embodiments, the fourth correspondence between the DMRS symbol positions includes the correspondence between the DMRS symbol positions and the number of valid symbols and configuration parameters included in the symbol group. For example, when the symbol group contains 12 symbols and the configuration parameter dmrs-AdditionalPosition='pos2', the corresponding symbol positions of the DMRS are l ₀ , 6, and 9, where l ₀ is the symbol position of the preceding DMRS and the value of _{l 0} It can be 0; 6, 9 is the position of the additional DMRS in the symbol group. According to the fourth correspondence, after determining the number of symbols contained in the symbol group and receiving the configuration parameters, the terminal device can determine the position of the DMRS in the symbol group; combine the positions in all the symbol groups of the DMRS , The position of the DMRS in the effective symbols in the above-mentioned multiple symbols can be determined; and further according to the positions of the effective symbols in the above-mentioned multiple symbols, the positions of the DMRS in the above-mentioned multiple symbols are determined. It should be understood that the specific values and parameters in the foregoing fourth correspondence are only examples, and the embodiments of the present application do not limit this. In the case that the number of symbol groups does not exceed the predetermined threshold, the embodiment of the present application may also adopt the DMRS symbol position correspondence relationship in the prior art, for example, the PUSCH DMRS symbol position correspondence table shown in Table 2 to determine where the DMRS is The position in the symbol group.

The first correspondence, the second correspondence, the third correspondence and the fourth correspondence may be expressed in the form of a DMRS symbol position correspondence table, and the above four correspondence relationships may be expressed in the same or different DMRS symbol position correspondence tables.

In some implementation manners, the terminal device divides the foregoing multiple symbols into at least two symbol groups according to a predefined manner and/or signaling instructions. This embodiment is applicable to the case where the above-mentioned multiple symbols include valid symbols and invalid symbols, and it is also applicable to the case where the above-mentioned multiple symbols include only valid symbols.

In some implementation manners, when the multiple symbols include valid coincidence and invalid symbols, the terminal device divides the valid symbols in the multiple symbols into at least two symbol groups according to a predefined manner and/or signaling indication.

In some embodiments, the number of symbols of the above-mentioned multiple symbols is K·L; wherein,

K is the number of transmissions of the above-mentioned channel;

L is the number of symbols corresponding to each transmission, and L is carried in the above-mentioned time domain resource allocation information.

The K·L symbols may include valid symbols, or include valid symbols and invalid symbols.

Or, in some implementations, when the above-mentioned multiple symbols include valid symbols and invalid symbols, the number of valid symbols is K·L; wherein,

K is the number of transmissions of the above-mentioned channel;

Optionally, the aforementioned channels include PUSCH, a downlink shared channel (PDSCH, Physical Downlink Shared CHannel), or a physical uplink control channel (PUCCH, Physical Uplink Control CHannel).

Hereinafter, the application will be described in detail with specific embodiments in conjunction with the accompanying drawings. In the following embodiments, the PUSCH channel is taken as an example. The DMRS resource determination method proposed in the embodiments of the present application can also be applied to other channels, such as PDSCH, PUCCH, and so on.

Example 1:

According to the number of transmissions K and the number of symbols L corresponding to each transmission carried in the time domain resource allocation information of the PUSCH, K·L symbols are determined. Determine the time domain resources of the DMRS according to K·L symbols. Among them, "·" represents the multiplication sign. All K·L symbols are valid symbols, or K·L symbols include valid symbols and invalid symbols.

Taking PUSCH repetition Type B as an example, K transmissions of PUSCH start at the symbol S of the Ks time slot and are transmitted on consecutive K·L symbols, and each transmission contains L symbols. Taking Fig. 3 as an example, K=4, L=4, starting from the start symbol S of the start time slot Ks, 16 consecutive symbols are valid symbols, that is, the symbol where PUSCH transmission is located.

For each PUSCH transmission, according to the prior art, the symbol where the DMRS is located is determined on the L symbols. The current value range of L is {1,...,14}. In the prior art, on the L symbols scheduled by the PUSCH, the symbol where the DMRS is located includes at least the preamble DMRS, and further, additional DMRS may be configured. When the value of L is small, the overhead of DMRS will be relatively large. In the prior art, the configuration of DMRS is related to L. For example, in the corresponding table of PUSCH DMRS symbol positions, for PUSCH mapping type B, when L is less than or equal to 4, only the preceding DMRS will exist. symbol. As L increases, more additional DMRS symbols can be configured. As shown in Fig. 4, when the number of symbols transmitted each time L=4, the symbol position of the DMRS is the first symbol among the L symbols. In Figure 4, the rectangle filled with diagonal lines is the DMRS symbol.

In this embodiment, the symbol configuration of the DMRS is not individually configured in the L symbols of each transmission, but the symbol position of the DMRS is configured in K·L symbols as a whole. In the symbol set containing K·L symbols, the DMRS symbols are configured, including the pre-DMRS, or the pre-DMRS and the additional DMRS.

When K and L are determined, the symbol where the DMRS is located is determined according to their specific values. For example, K·L symbols include preamble DMRS symbols and several additional DMRS, and the number and position of additional DMRS depend on the number of K·L. The following methods can be used to determine the symbol where the DMRS is located:

-According to a predefined rule: the symbol position of the DMRS is determined according to the symbol position of the pre-DMRS configured by the higher layer and the number of K·L symbols, for example, the symbol position or number of the additional DMRS is determined according to a certain interval.

-According to the configuration signaling of the network: similar to the prior art, a corresponding table of DMRS symbol positions is preset, and the symbol position of the DMRS is determined according to the configuration parameter dmrs-AdditionalPosition and the number of symbols K·L for repeated PUSCH transmission. For example, the value of K is 1, 2, 4, 7, 12, 16, and the value of L is 2, 4, 7, and the value of K·L includes 2, 4, 7, 8, 14, 16, 24, 28, 32, 48, 49, 64, 84, 112. Set the corresponding table of DMRS for the number of these symbols, as shown in Table 3 below:

table 3

It can be seen that the symbol position of the DMRS is determined according to the total number of symbols of the repeatedly transmitted PUSCH and the high-level configuration parameters. It should be noted that the above table is just an example, and the specific values in the table are not limited.

Taking Fig. 5 as an example, L=4, K=4, and the symbol positions of the DMRS are configured on 16 symbols. As an example in Table 3 above, when the high-level parameter dmrs-AdditionalPosition='pos2', the symbol position of the DMRS is shown in Figure 5, and the rectangle filled with diagonal lines in Figure 5 is the DMRS symbol. It can be seen that the configuration of the symbol position of the DMRS is configured through high-level parameters according to the overall length of 16 symbols.

Compared with the prior art, the DMRS symbol setting in the embodiment of the present application is more reasonable, the overhead is reduced, and the time domain resource utilization rate is higher.

Example 2:

When the K·L symbols include valid symbols and invalid symbols, the symbol positions of the DMRS are configured in the valid symbols in the K·L symbols; since the positions of the valid symbols in the K·L symbols are determined, it is possible to Further determine the position of the DMRS in the K·L symbols.

In the prior art, taking PUSCH repetition Type B as an example, K transmissions of PUSCH are transmitted on consecutive K·L symbols, and each transmission includes L symbols. The K·L symbols are the symbols where the K transmissions are nominally located. In fact, since there may be some invalid symbols on consecutive K·L symbols, for example, some symbols are indicated as downlink symbols, or some symbols are indicated as invalid symbols by the high-level parameter InvalidSymbolPattern. At this time, these invalid symbols are not used for PUSCH repeated transmission, and the remaining symbols among the K·L symbols except for these invalid symbols are used for PUSCH repetition Type B transmission. A nominal transmission containing L symbols may be divided into one or more actual transmissions due to invalid symbols, and each actual transmission contains consecutive valid symbols. When the number of valid symbols contained in an actual transmission is 1, unless L=1, the actual transmission is cancelled. DMRS symbols are set separately for each actual transmission. This will cause DMRS to be very expensive. Take Figure 6 as an example, L=7, K=4, including 4 invalid symbols, each nominal transmission is divided into two actual transmissions by the invalid symbols, and each actual transmission is determined according to L'=3 to determine the symbol position of the DMRS as the actual The first symbol transmitted. In Figure 6, the dark gray filled rectangles are invalid symbols, and the diagonal filled rectangles are DMRS symbols.

In this embodiment, considering the existence of invalid symbols, the symbol positions of the DMRS are configured among the valid symbols among the K·L symbols. Specifically, according to the values of K and L, determine the symbol set containing K·L symbols; determine the effective symbol set in the symbol set of K·L symbols according to high-level configuration information or physical layer signaling; Set, and high-level configuration information or physical layer signaling, determine the symbol position of the DMRS in the effective symbol set. The specific method for determining the DMRS can use the similar method in Embodiment 1, and the difference is that the symbol position of the DMRS is determined according to the effective symbols in the K·L symbols. As shown in Figure 7, L=7, K=4, and the number of effective symbols in the K·L symbols is 24. According to the 24 symbols and the high-level configuration information or physical layer signaling, determine the DMRS in the effective symbol set. Symbol position. In Figure 7, the dark gray filled rectangles are invalid symbols, and the diagonal filled rectangles are DMRS symbols.

Compared with the prior art, the method proposed in the embodiments of the present application has less DMRS overhead, and the demodulation performance of the PUSCH can be guaranteed. Compared with Embodiment 1, this embodiment can further determine the position of the DMRS symbol according to the effective symbol set. The DMRS transmission symbol setting is more reasonable, the DMRS overhead is further reduced, and the time domain resource utilization rate is higher.

Example 3:

The time domain resources of the DMRS are determined according to some of the K·L symbols. Among them, all K·L symbols are valid symbols, or K·L symbols include valid symbols and invalid symbols.

This embodiment can adopt the following two methods:

Method 1: Divide the K·L symbols into several symbol groups, and each symbol group is configured with the symbol position of the DMRS. The number of symbols in each symbol group can be the same or different. The symbols included in each symbol group include at least one symbol of the symbols corresponding to one or more PUSCH transmissions in K transmissions. Configure the symbol position of the DMRS in each symbol group, including pre-DMRS, or pre-DMRS and additional DMRS. In this embodiment, the symbol position of the DMRS in the effective symbol set can be determined according to the effective symbol set, and high-level configuration information or physical layer signaling.

Taking FIG. 8 as an example, 28 symbols are divided into two symbol groups, and each symbol group includes 14 symbols. In this embodiment, the preset corresponding table of DMRS symbol positions is used to determine the symbol positions of DMRS among the 14 symbols in each symbol group according to the configuration parameters and the number of symbols contained in the symbol group. You can refer to Table 2. When the parameter dmrs-AdditionalPosition='pos2', the relative symbol positions of the DMRS in the symbol group are 0, 7, and 11. Alternatively, you can refer to Table 3. When the high-level parameter dmrs-AdditionalPosition='pos2', the relative symbol positions of the DMRS in the symbol group are 0, 4, 8, and 12. The above is an example where two symbol groups include the same number of symbols. The number of symbols included in each symbol group may be the same or different, which is not limited in the embodiments of the present application.

Manner 2: When the K·L symbols include valid symbols and invalid symbols, the valid symbols in the K·L symbols are divided into several symbol groups, and each symbol group is configured with the symbol position of the DMRS. As shown in Fig. 8, there are 24 valid symbols, and the valid symbols are grouped. For example, the 24 valid symbols are divided into two symbol groups, and each symbol group includes 12 valid symbols. The symbol position of the DMRS is determined among the 12 effective symbols of each symbol group. In this embodiment, a preset corresponding table of DMRS symbol positions is used to determine the symbol position of the DMRS in each symbol group according to the configuration parameters and the number of symbols contained in the symbol group (all valid symbols). You can refer to Table 2. When the high-level parameter dmrs-AdditionalPosition='pos2', the relative symbol positions of the DMRS in each symbol group are 0, 6, and 9. The above is an example where two symbol groups include the same number of valid symbols. The number of valid symbols included in each symbol group may be the same or different, which is not limited in the embodiments of the present application.

In this embodiment, in order to distinguish from the method of configuring DMRS symbols in each symbol included in actual transmission in the prior art, the symbols included in the symbol group may be further limited to include at least one symbol of the symbols corresponding to two PUSCH transmissions. The PUSCH transmission may be a nominal transmission including L symbols, or an actual transmission including less than L symbols.

Compared with

Embodiments

1 and 2, this embodiment can further determine the position of the DMRS symbol according to the divided symbol groups. The DMRS transmission symbol setting is more reasonable, the DMRS overhead is further reduced, and the time domain resource utilization rate is higher.

Example 4:

According to the number of transmissions K and the number of symbols L corresponding to each transmission carried in the time domain resource allocation information of the PUSCH, K·L symbols are determined. K·L symbols are consecutive valid symbols. Optionally, a valid symbol is determined from the start symbol S, and when an invalid symbol is encountered, the symbol is skipped and the next valid symbol is determined until K·L valid symbols are determined.

After the K·L symbols are determined, at least the following two methods can be used to configure the symbol positions of the DMRS according to the K·L symbols.

Manner 1: Determine the symbol position of the DMRS according to the symbol position of the pre-DMRS configured by the higher layer and the number of K·L symbols, for example, determine the symbol position or number of the additional DMRS at a certain interval. Alternatively, a corresponding table of DMRS symbol positions is preset, and the symbol position of the DMRS is determined according to the configuration parameter (such as dmrs-AdditionalPosition) and the aforementioned determined K·L symbols.

Method 2: Divide the K·L symbols into several symbol groups, and each symbol group can contain the same or different numbers of symbols. Determine the symbol position of the DMRS in each symbol group. When determining the symbol position of the DMRS in each symbol group, the symbol position of the DMRS can be determined according to the symbol position of the pre-DMRS configured by the higher layer and the number of symbols in the symbol group. For example, the symbol where the additional DMRS is located is determined according to a certain interval. Location or number. Alternatively, a corresponding table of DMRS symbol positions is preset, and the symbol position of the DMRS in the symbol group is determined according to the configuration parameter (for example, dmrs-AdditionalPosition) and the symbols in the symbol group.

Example 5:

According to the number of transmissions K and the number of symbols L corresponding to each transmission carried in the time domain resource allocation information of the PUSCH, (K·L+N) symbols are determined, and N is a positive integer. It includes K·L valid symbols and N invalid symbols interspersed between the first valid symbol and the last valid symbol. For the determination of the valid symbol, optionally, the valid symbol is determined from the start symbol S, and when an invalid symbol is encountered, the symbol is skipped and the next valid symbol is determined until the K·L valid symbols are determined.

After the (K·L+N) symbols are determined, at least the following four methods can be used to configure the symbol positions of the DMRS according to the (K·L+N) symbols.

method one:

The symbol position of the DMRS is determined according to the symbol position of the pre-DMRS configured by the higher layer and the number of (K·L+N) symbols. For example, the symbol position or number of the additional DMRS is determined according to a certain interval. Alternatively, a corresponding table of DMRS symbol positions is preset, and the symbol position of the DMRS is determined according to the configuration parameter (such as dmrs-AdditionalPosition) and the previously determined (K·L+N) symbols.

Way two:

The (K·L+N) symbols are divided into several symbol groups, and each symbol group is configured with the symbol position of the DMRS. When determining the symbol position of the DMRS in each symbol group, the symbol position of the DMRS can be determined according to the symbol position of the pre-DMRS configured by the higher layer and the number of symbols in the symbol group. For example, the symbol where the additional DMRS is located is determined according to a certain interval. Location or number. Alternatively, a corresponding table of DMRS symbol positions is preset, and the symbol position of the DMRS in the symbol group is determined according to the configuration parameter (such as dmrs-AdditionalPosition) and the symbols in the symbol group.

Way three:

The symbol position of the DMRS is determined among the valid symbols in (K·L+N) symbols. Optionally, the symbol position of the DMRS is determined according to the symbol position of the preceding DMRS configured by the higher layer and the number of K·L effective symbols, for example, the symbol position or number of the additional DMRS is determined according to a certain interval. Or, preset a corresponding table of DMRS symbol positions, and determine the position of the DMRS in the valid symbols according to the configuration parameter dmrs-AdditionalPosition and K·L valid symbols in the (K·L+N) symbols; and further according to the valid symbols. The position of the symbol in the above (K·L+N) symbols determines the position of the DMRS in the above (K·L+N) symbols.

Way four:

The K·L effective symbols in the (K·L+N) symbols are divided into several symbol groups, and each symbol group is configured with the symbol position of the DMRS. When determining the symbol position of the DMRS in each symbol group, the symbol position of the DMRS can be determined according to the symbol position of the pre-DMRS configured by the higher layer and the number of effective symbols in the symbol group. For example, the location of the additional DMRS can be determined according to a certain interval. Symbol position or number. Or, preset a corresponding table of DMRS symbol positions, determine the symbol position of the DMRS in the symbol group according to the configuration parameter dmrs-AdditionalPosition and the valid symbols in the symbol group; and further according to the position of the DMRS in each symbol group, and The position of the effective symbol in the above (K·L+N) symbols determines the position of the DMRS in the above (K·L+N) symbols.

In this embodiment, K·L effective symbols are determined according to the number of transmissions K and the number of symbols L corresponding to each transmission carried in the time domain resource allocation information of the PUSCH. Optionally, a valid symbol is determined from the start symbol S, and when an invalid symbol is encountered, the symbol is skipped and the next valid symbol is determined until K·L valid symbols are determined. As shown in Fig. 9, L=7, K=4, and the position of invalid symbols is configured in the high-level parameters, but the number of valid symbols for PUSCH transmission is still 28. In FIG. 9, the dark gray filled rectangles are invalid symbols. The multiple symbols transmitted by PUSCH in FIG. 9 include 28 valid symbols and 4 invalid symbols interspersed between the first valid symbol and the last valid symbol.

This embodiment guarantees the number of symbols used for PUSCH transmission and improves the reliability of PUSCH transmission.

The embodiment of the present application also proposes a method for determining DMRS resources. FIG. 10 is a flowchart of a method 1000 for determining DMRS resources according to an embodiment of the present application. The method may optionally be applied to the system shown in FIG. 1. But it is not limited to this. This method includes at least part of the following content.

S1010: The network device determines multiple symbols according to the number of channel transmissions and time domain resource allocation information, where the multiple symbols include at least one symbol of the symbols corresponding to at least two transmissions;

S1020: The network device determines the position of the DMRS in the multiple symbols.

Optionally, the foregoing multiple symbols include valid symbols and invalid symbols; or, the foregoing multiple symbols include valid symbols.

Optionally, the above-mentioned valid symbols include symbols used for transmission on the channel, and the above-mentioned invalid symbols include symbols not used for transmission on the channel.

In some embodiments, the position of the DMRS in the plurality of symbols is determined according to a predefined rule; and/or,

In some embodiments, when the plurality of symbols include valid symbols and invalid symbols,

Determine the position of the DMRS in the valid symbols in the plurality of symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the second correspondence between the number of valid symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.

In some embodiments, the multiple symbols are divided into at least two symbol groups;

Determine the position of the DMRS in each symbol group according to a predefined rule; and/or, determine the DMRS in each symbol according to the number of symbols contained in each symbol group, configuration parameters, and the third correspondence between DMRS symbol positions The position in the group.

Divide the valid symbols in the multiple symbols into at least two symbol groups;

Determine the position of the DMRS in each symbol group according to predefined rules; and/or, determine the DMRS in each symbol group according to the number of symbols contained in each symbol group, configuration parameters, and the fourth correspondence between the DMRS symbol positions In the location.

Optionally, the above method further includes: the network device sends the above configuration parameters to the terminal device.

Optionally, the number of symbols in the above-mentioned symbol group is the same or different.

Optionally, the above-mentioned symbol group includes at least one symbol among symbols corresponding to at least two transmissions.

Optionally, the above method further includes: the network device sends a signaling indicating the method for dividing the symbol group to the terminal device.

Optionally, the foregoing DMRS includes a pre-DMRS; or, the foregoing DMRS includes a pre-DMRS and an additional DMRS.

K is the number of transmissions of the channel;

In some embodiments, when the above-mentioned multiple symbols include valid symbols and invalid symbols, the number of valid symbols is K·L; wherein,

K is the number of transmissions of the channel;

L is the number of symbols corresponding to each transmission, and L is carried in the time domain resource allocation information.

Optionally, the aforementioned channel includes PUSCH, PDSCH or PUCCH.

An embodiment of the present application also proposes a terminal device. FIG. 11 is a schematic structural diagram of a terminal device 1100 according to an embodiment of the present application, including:

The first symbol determining module 1110 is configured to determine multiple symbols according to the number of channel transmissions and time domain resource allocation information, and the multiple symbols include at least one symbol of symbols corresponding to at least two transmissions;

The first position determining module 1120 is configured to determine the position of the demodulation reference signal DMRS in the multiple symbols.

Optionally, in this embodiment of the present application, the multiple symbols include valid symbols and invalid symbols; or, the multiple symbols include valid symbols.

Optionally, in this embodiment of the present application, the valid symbols include symbols used for transmission on the channel, and the invalid symbols include symbols not used for transmission on the channel.

Optionally, in this embodiment of the present application, the first position determining module 1120 is used to:

Determine the position of the DMRS in the multiple symbols according to a predefined rule; and/or,

Optionally, in this embodiment of the present application, the first position determining module 1120 is configured to: when the plurality of symbols include valid symbols and invalid symbols,

Divide the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each symbol group according to predefined rules; and/or, determine the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, configuration parameters, and the third correspondence between the DMRS symbol positions The position in the symbol group.

When the plurality of symbols include valid symbols and invalid symbols,

Dividing valid symbols in the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each symbol group according to predefined rules; and/or, determine the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, configuration parameters, and the fourth correspondence between the DMRS symbol positions The position in the symbol group.

Optionally, in this embodiment of the present application, the number of symbols in the symbol group is the same or different.

Optionally, in this embodiment of the present application, the symbol group includes at least one symbol among symbols corresponding to at least two transmissions.

Optionally, in this embodiment of the present application, the first position determining module 1120 divides the multiple symbols into at least two symbol groups according to a predefined manner and/or signaling instructions.

Optionally, in this embodiment of the present application, the first position determining module 1120 divides the valid symbols in the plurality of symbols into at least two symbol groups according to a predefined manner and/or signaling instructions.

Optionally, in the embodiment of the present application, the number of symbols of the multiple symbols is K·L; where,

The K is the number of transmissions of the channel;

The L is the number of symbols corresponding to each transmission, and the L is carried in the time domain resource allocation information.

Optionally, in the embodiment of the present application, when the multiple symbols include valid symbols and invalid symbols, the number of symbols of the valid symbols is K·L; where,

The K is the number of transmissions of the channel;

Optionally, in this embodiment of the present application, the DMRS includes a pre-DMRS; or,

The DMRS includes a pre-DMRS and an additional DMRS.

Optionally, in this embodiment of the present application, the channel includes PUSCH, PDSCH, or PUCCH.

It should be understood that the above-mentioned and other operations and/or functions of the modules in the terminal device according to the embodiment of the present application are used to implement the corresponding process of the terminal device in the method 200 of FIG.

An embodiment of the present application also proposes a network device. FIG. 12 is a schematic structural diagram of a network device 1200 according to an embodiment of the present application, including:

The second symbol determining module 1210 is configured to determine multiple symbols according to the number of channel transmissions and time domain resource allocation information, and the multiple symbols include at least one symbol of the symbols corresponding to at least two transmissions;

The second position determining module 1220 is used to determine the position of the demodulation reference signal DMRS in the multiple symbols.

Optionally, in this embodiment of the present application, the multiple symbols include valid symbols and invalid symbols; or,

The plurality of symbols includes valid symbols.

Optionally, in this embodiment of the present application, the second position determining module 1220 is used to:

Optionally, in this embodiment of the present application, the second position determining module 1220 is configured to: when the plurality of symbols include valid symbols and invalid symbols,

Divide the plurality of symbols into at least two symbol groups;

When the plurality of symbols include valid symbols and invalid symbols,

Optionally, as shown in FIG. 13, the network device proposed in the embodiment of the present application further includes: a parameter sending module 1330, configured to send the configuration parameter to the terminal device.

Optionally, in the embodiment of the present application, it further includes: a signaling sending module 1340, configured to send a signaling indicating a method for dividing a symbol group to a terminal device.

The DMRS includes a pre-DMRS and an additional DMRS.

The K is the number of transmissions of the channel;

Optionally, in the embodiment of the present application, the channel includes a physical uplink shared channel PUSCH, a physical downlink shared channel PDSCH, or a physical uplink control channel PUCCH.

It should be understood that the above-mentioned and other operations and/or functions of the modules in the network device according to the embodiment of the present application are used to implement the corresponding process of the network device in the method 1000 of FIG. 10, and are not repeated here for brevity.

FIG. 14 is a schematic structural diagram of a communication device 1400 according to an embodiment of the present application. The communication device 1400 shown in FIG. 14 includes a processor 1410, and the processor 1410 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 14, the communication device 1400 may further include a memory 1420. The processor 1410 may call and run a computer program from the memory 1420 to implement the method in the embodiment of the present application.

The memory 1420 may be a separate device independent of the processor 1410, or may be integrated in the processor 1410.

Optionally, as shown in FIG. 14, the communication device 1400 may further include a transceiver 1430, and the processor 1410 may control the transceiver 1430 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.

Among them, the transceiver 1430 may include a transmitter and a receiver. The transceiver 1430 may further include an antenna, and the number of antennas may be one or more.

Optionally, the communication device 1400 may be a terminal device of an embodiment of the present application, and the communication device 1400 may implement corresponding procedures implemented by the terminal device in each method of the embodiments of the present application. For brevity, details are not described herein again.

Optionally, the communication device 1400 may be a network device of an embodiment of the present application, and the network device 1400 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, details are not described herein again.

FIG. 15 is a schematic structural diagram of a chip 1500 according to an embodiment of the present application. The chip 1500 shown in FIG. 15 includes a processor 1510, and the processor 1510 can call and run a computer program from the memory to implement the method in the embodiment of the present application.

Optionally, as shown in FIG. 15, the chip 1500 may further include a memory 1520. The processor 1510 can call and run a computer program from the memory 1520 to implement the method in the embodiment of the present application.

The memory 1520 may be a separate device independent of the processor 1510, or may be integrated in the processor 1510.

Optionally, the chip 1500 may further include an input interface 1530. The processor 1510 can control the input interface 1530 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.

Optionally, the chip 1500 may further include an output interface 1540. The processor 1510 can control the output interface 1540 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the terminal device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For brevity, details are not described herein again.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, details are not described herein again.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-level chips, system-on-chips, system-on-chips, or system-on-chips.

The aforementioned processor may be a general-purpose processor, a digital signal processor (digital signal processor, DSP), a ready-made programmable gate array (field programmable gate array, FPGA), an application specific integrated circuit (ASIC), or Other programmable logic devices, transistor logic devices, discrete hardware components, etc. Among them, the aforementioned general-purpose processor may be a microprocessor or any conventional processor.

The above-mentioned memory may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM).

It should be understood that the foregoing memory is exemplary but not restrictive. For example, the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is to say, the memory in the embodiments of the present application is intended to include, but is not limited to, these and any other suitable types of memory.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instruction may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instruction may be transmitted from a website, computer, server, or data center through a cable (Such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

It should be understood that in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application. The implementation process constitutes any limitation.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, and they should all cover Within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A method for determining demodulation reference signal resources includes:

The terminal device determines a plurality of symbols according to the number of transmissions of the channel and the time domain resource allocation information, and the plurality of symbols includes at least one symbol of the symbols corresponding to the at least two transmissions;

The terminal device determines the position of the demodulation reference signal DMRS in the multiple symbols.
The method of claim 1, wherein:

The multiple symbols include valid symbols and invalid symbols; or,

The plurality of symbols includes valid symbols.
The method according to claim 2, wherein the valid symbols include symbols used for the channel transmission, and the invalid symbols include symbols not used for the channel transmission.
The method according to any one of claims 1 to 3, wherein:

Determine the position of the DMRS in the plurality of symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the first correspondence between the number of symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.
The method according to any one of claims 1 to 3, wherein when the plurality of symbols include valid symbols and invalid symbols,

Determine the position of the DMRS in the valid symbols in the plurality of symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the second correspondence between the number of valid symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.
The method according to any one of claims 1 to 3, wherein:

Dividing the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each of the symbol groups according to predefined rules; and/or, determine the position of the DMRS according to the number of symbols contained in each of the symbol groups, configuration parameters, and the third correspondence between the DMRS symbol positions The position of the DMRS in each of the symbol groups.
The method according to any one of claims 1 to 3, wherein when the plurality of symbols include valid symbols and invalid symbols,

Dividing valid symbols in the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each of the symbol groups according to a predefined rule; and/or, determine the position of the DMRS according to the number of symbols contained in each of the symbol groups, configuration parameters, and the fourth correspondence between the DMRS symbol positions The position of the DMRS in each of the symbol groups.
The method according to claim 6 or 7, wherein the number of symbols in the symbol group is the same or different.
The method according to any one of claims 6 to 8, wherein the symbol group includes at least one symbol among symbols corresponding to at least two transmissions.
The method according to claim 6, wherein the terminal device divides the plurality of symbols into at least two symbol groups according to a predefined manner and/or signaling instructions.
The method according to claim 7, wherein the terminal device divides the effective symbols in the plurality of symbols into at least two symbol groups according to a predefined manner and/or signaling instructions.
The method according to any one of claims 1 to 11, wherein:

The number of symbols of the plurality of symbols is K·L; where,

The K is the number of transmissions of the channel;

The L is the number of symbols corresponding to each transmission, and the L is indicated by the time domain resource allocation information.
The method according to any one of claims 1 to 11, wherein when the plurality of symbols include valid symbols and invalid symbols, the number of symbols of the valid symbols is K·L; wherein,

The K is the number of transmissions of the channel;

The L is the number of symbols corresponding to each transmission, and the L is indicated by the time domain resource allocation information.
The method according to any one of claims 1 to 13, wherein:

The DMRS includes a pre-DMRS; or,

The DMRS includes a pre-DMRS and an additional DMRS.
The method according to any one of claims 1 to 14, wherein the channel comprises a physical uplink shared channel PUSCH, a physical downlink shared channel PDSCH, or a physical uplink control channel PUCCH.
A method for determining demodulation reference signal resources includes:

The network device determines multiple symbols according to the number of channel transmissions and time domain resource allocation information, where the multiple symbols include at least one symbol of symbols corresponding to at least two transmissions;

The network device determines the position of the demodulation reference signal DMRS in the plurality of symbols.
The method of claim 16, wherein:

The multiple symbols include valid symbols and invalid symbols; or,

The plurality of symbols includes valid symbols.
The method according to claim 16 or 17, wherein the valid symbols include symbols used for the channel transmission, and the invalid symbols include symbols not used for the channel transmission.
The method according to any one of claims 16 to 18, wherein:

Determine the position of the DMRS in the plurality of symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the first correspondence between the number of symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.
The method according to any one of claims 16 to 18, wherein when the plurality of symbols include valid symbols and invalid symbols,

Determine the position of the DMRS in the valid symbols in the plurality of symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the second correspondence between the number of valid symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.
The method according to any one of claims 16 to 18, wherein:

Dividing the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each of the symbol groups according to predefined rules; and/or, determine the position of the DMRS according to the number of symbols contained in each of the symbol groups, configuration parameters, and the third correspondence between the DMRS symbol positions The position of the DMRS in each of the symbol groups.
The method according to any one of claims 16 to 18, wherein when the plurality of symbols include valid symbols and invalid symbols,

Dividing valid symbols in the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each of the symbol groups according to a predefined rule; and/or, determine the position of the DMRS according to the number of symbols contained in each of the symbol groups, configuration parameters, and the fourth correspondence between the DMRS symbol positions The position of the DMRS in each of the symbol groups.
The method according to any one of claims 19 to 22, further comprising: the network device sending the configuration parameter to a terminal device.
The method according to claim 21 or 22, wherein the number of symbols in the symbol group is the same or different.
The method according to claim 21, 22, or 24, wherein the symbol group includes at least one symbol among symbols corresponding to at least two transmissions.
The method according to claim 21, 22, 24, or 25, further comprising: the network device sending a signaling indicating a method of dividing a symbol group to a terminal device.
The method according to any one of claims 16 to 26, wherein:

The DMRS includes a pre-DMRS; or,

The DMRS includes a pre-DMRS and an additional DMRS.
The method according to any one of claims 16 to 27, wherein:

The number of symbols of the plurality of symbols is K·L; where,

The K is the number of transmissions of the channel;

The L is the number of symbols corresponding to each transmission, and the L is carried in the time domain resource allocation information.
The method according to any one of claims 16 to 27, wherein when the plurality of symbols include valid symbols and invalid symbols, the number of symbols of the valid symbols is K·L; wherein,

The K is the number of transmissions of the channel;

The L is the number of symbols corresponding to each transmission, and the L is carried in the time domain resource allocation information.
The method according to any one of claims 16 to 29, wherein the channel comprises a physical uplink shared channel PUSCH, a physical downlink shared channel PDSCH, or a physical uplink control channel PUCCH.
A terminal device, including:

The first symbol determining module is configured to determine a plurality of symbols according to the number of transmissions of the channel and the time domain resource allocation information, the plurality of symbols include at least one symbol of symbols corresponding to at least two transmissions;

The first position determining module is used to determine the position of the demodulation reference signal DMRS in the multiple symbols.
The terminal device according to claim 31, wherein:

The multiple symbols include valid symbols and invalid symbols; or,

The plurality of symbols includes valid symbols.
The terminal device according to claim 32, wherein said valid symbols include symbols used for said channel transmission, and said invalid symbols include symbols not used for said channel transmission.
The terminal device according to any one of claims 31 to 33, wherein the first position determining module is configured to:

Determine the position of the DMRS in the plurality of symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the first correspondence between the number of symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.
The terminal device according to any one of claims 31 to 33, wherein the first position determining module is configured to: when the plurality of symbols include valid symbols and invalid symbols,

Determine the position of the DMRS in the valid symbols in the plurality of symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the second correspondence between the number of valid symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.
The terminal device according to any one of claims 31 to 33, wherein the first position determining module is configured to:

Dividing the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each of the symbol groups according to predefined rules; and/or, determine the position of the DMRS according to the number of symbols contained in each of the symbol groups, configuration parameters, and the third correspondence between the DMRS symbol positions The position of the DMRS in each of the symbol groups.
The terminal device according to any one of claims 31 to 33, wherein the first position determining module is configured to:

When the plurality of symbols include valid symbols and invalid symbols,

Dividing valid symbols in the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each of the symbol groups according to a predefined rule; and/or, determine the position of the DMRS according to the number of symbols contained in each of the symbol groups, configuration parameters, and the fourth correspondence between the DMRS symbol positions The position of the DMRS in each of the symbol groups.
The terminal device according to claim 36 or 37, wherein the number of symbols in the symbol group is the same or different.
The terminal device according to any one of claims 36 to 38, wherein the symbol group includes at least one symbol among symbols corresponding to at least two transmissions.
The terminal device according to claim 36, wherein the first position determining module divides the plurality of symbols into at least two symbol groups according to a predefined manner and/or signaling indication.
The terminal device according to claim 37, wherein the first position determining module divides the valid symbols in the plurality of symbols into at least two symbol groups according to a predefined manner and/or signaling instructions.
The terminal device according to any one of claims 31 to 41, wherein:

The number of symbols of the plurality of symbols is K·L; where,

The K is the number of transmissions of the channel;

The L is the number of symbols corresponding to each transmission, and the L is carried in the time domain resource allocation information.
The terminal device according to any one of claims 31 to 41, wherein when the plurality of symbols include valid symbols and invalid symbols, the number of symbols of the valid symbols is K·L; wherein,

The K is the number of transmissions of the channel;

The L is the number of symbols corresponding to each transmission, and the L is carried in the time domain resource allocation information.
The terminal device according to any one of claims 31 to 43, wherein:

The DMRS includes a pre-DMRS; or,

The DMRS includes a pre-DMRS and an additional DMRS.
The terminal device according to any one of claims 31 to 44, wherein the channel comprises a physical uplink shared channel PUSCH, a physical downlink shared channel PDSCH, or a physical uplink control channel PUCCH.
A network device including:

A second symbol determining module, configured to determine a plurality of symbols according to the number of channel transmissions and time domain resource allocation information, the plurality of symbols including at least one symbol of the symbols corresponding to at least two transmissions;

The second position determining module is used to determine the position of the demodulation reference signal DMRS in the multiple symbols.
The network device according to claim 46, wherein:

The multiple symbols include valid symbols and invalid symbols; or,

The plurality of symbols includes valid symbols.
The network device according to claim 46 or 47, wherein the valid symbols include symbols used for the channel transmission, and the invalid symbols include symbols not used for the channel transmission.
The network device according to any one of claims 46 to 48, wherein the second location determining module is configured to:

Determine the position of the DMRS in the multiple symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the first correspondence between the number of symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.
The network device according to any one of claims 46 to 48, wherein the second position determining module is configured to: when the plurality of symbols include valid symbols and invalid symbols,

Determine the position of the DMRS in the valid symbols in the plurality of symbols according to a predefined rule; and/or,

The position of the DMRS in the plurality of symbols is determined according to the second correspondence between the number of valid symbols included in the plurality of symbols, configuration parameters, and DMRS symbol positions.
The network device according to any one of claims 46 to 48, wherein the second position determining module is configured to:

Dividing the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each of the symbol groups according to predefined rules; and/or, determine the position of the DMRS according to the number of symbols contained in each of the symbol groups, configuration parameters, and the third correspondence between the DMRS symbol positions The position of the DMRS in each of the symbol groups.
The network device according to any one of claims 46 to 48, wherein the second position determining module is configured to:

When the plurality of symbols include valid symbols and invalid symbols,

Dividing valid symbols in the plurality of symbols into at least two symbol groups;

Determine the position of the DMRS in each of the symbol groups according to a predefined rule; and/or, determine the position of the DMRS according to the number of symbols contained in each of the symbol groups, configuration parameters, and the fourth correspondence between the DMRS symbol positions The position of the DMRS in each of the symbol groups.
The network device according to any one of claims 49 to 52, further comprising: a parameter sending module, configured to send the configuration parameters to the terminal device.
The network device according to claim 51 or 52, wherein the number of symbols in the symbol group is the same or different.
The network device according to claim 51, 52, or 54, wherein the symbol group includes at least one symbol among symbols corresponding to at least two transmissions.
The network device according to claim 51, 52, 54 or 55, further comprising: a signaling sending module, configured to send a signaling indicating a method for dividing a symbol group to a terminal device.
The network device according to any one of claims 46 to 56, wherein:

The DMRS includes a pre-DMRS; or,

The DMRS includes a pre-DMRS and an additional DMRS.
The network device according to any one of claims 46 to 57, wherein:

The number of symbols of the plurality of symbols is K·L; where,

The K is the number of transmissions of the channel;

The L is the number of symbols corresponding to each transmission, and the L is carried in the time domain resource allocation information.
The network device according to any one of claims 46 to 57, wherein when the plurality of symbols include valid symbols and invalid symbols, the number of symbols of the valid symbols is K·L; wherein,

The K is the number of transmissions of the channel;

The L is the number of symbols corresponding to each transmission, and the L is carried in the time domain resource allocation information.
The network device according to any one of claims 46 to 59, wherein the channel comprises a physical uplink shared channel PUSCH, a physical downlink shared channel PDSCH, or a physical uplink control channel PUCCH.
A terminal device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute as described in any one of claims 1 to 15 The method described.
A network device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute as described in any one of claims 16 to 30 The method described.
A chip comprising: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 1 to 15.
A chip comprising: a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the method according to any one of claims 16 to 30.
A computer-readable storage medium for storing a computer program that enables a computer to execute the method according to any one of claims 1 to 15.
A computer-readable storage medium for storing a computer program that enables a computer to execute the method according to any one of claims 16 to 30.
A computer program product comprising computer program instructions that cause a computer to execute the method according to any one of claims 1 to 15.
A computer program product comprising computer program instructions that cause a computer to execute the method according to any one of claims 16 to 30.
A computer program that causes a computer to execute the method according to any one of claims 1 to 15.
A computer program that causes a computer to execute the method according to any one of claims 16 to 30.