CN115428375A

CN115428375A - Method for determining demodulation reference signal resource, terminal equipment and network equipment

Info

Publication number: CN115428375A
Application number: CN202080099472.0A
Authority: CN
Inventors: 贺传峰
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2022-12-02
Also published as: WO2021232321A1

Abstract

The method for determining the demodulation reference signal resource comprises the steps that the terminal equipment determines a plurality of symbols according to the transmission times of a channel and time domain resource allocation information, wherein the plurality of symbols comprise at least one symbol in symbols corresponding to at least two times of transmission; the terminal device determines a position of a demodulation reference signal (DMRS) in the plurality of symbols. The embodiment of the application can reduce the overhead of the DMRS and improve the utilization rate of time domain resources.

Description

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

Technical Field

The present application relates to the field of communications, and in particular, to a method for determining demodulation reference signal resources, a terminal device, and a network device.

Background

In the prior art, the channel is repeatedly transmitted (retransmission), and the time domain resource allocation of each transmission is the same. The corresponding Demodulation Reference Signal (DMRS) resource also is a time domain resource determined separately for each transmission. For example, for multiple transmissions of a Physical Uplink Shared Channel (PUSCH), DMRS time domain resources are configured separately for each transmission, which results in a low resource utilization rate; in particular, when the number of symbols transmitted at each time is small, the overhead of the DMRS is large.

Disclosure of Invention

The embodiment of the application provides a method for determining DMRS resources, terminal equipment and network equipment, which can reduce the cost of DMRS and improve the utilization rate of time domain resources.

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

the terminal equipment determines a plurality of symbols according to the transmission times of the channel and the time domain resource allocation information, wherein the plurality of symbols comprise at least one symbol in symbols corresponding to at least two transmissions;

the terminal device determines a position of a demodulation reference signal (DMRS) in the plurality of symbols.

The embodiment of the application provides a method for determining demodulation reference signal resources, which comprises the following steps:

the network equipment determines a plurality of symbols according to the transmission times of the channel and the time domain resource allocation information, wherein the plurality of symbols comprise at least one symbol in symbols corresponding to at least two transmissions;

the network device determines a position of a demodulation reference signal, DMRS, in the plurality of symbols.

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

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

a first position determination module, configured to determine a position of a demodulation reference signal DMRS in the plurality of symbols.

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

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

a second position determination module, configured to determine a position of a demodulation reference signal DMRS in the plurality of symbols.

An embodiment of the present application provides a terminal device, including: a processor and a memory, the memory being used for storing a computer program, the processor being used for calling and executing the computer program stored in the memory, and executing any one of the above-mentioned first method for determining DMRS resources.

An embodiment of the present application provides a network device, including: a processor and a memory, the memory being used for storing a computer program, the processor being used for calling and executing the computer program stored in the memory to execute any one of the above-mentioned methods for determining DMRS resources.

The embodiment of the application provides a chip, including: a processor, configured to call and run a computer program from the memory, so that a device on which the chip is installed performs any one of the above-described methods for determining DMRS resources of the first type.

The embodiment of the application provides a chip, including: a processor for calling and running a computer program from the memory, so that the device on which the chip is installed performs any one of the above-described methods for determining the second DMRS resource.

An embodiment of the present application provides a computer-readable storage medium for storing a computer program, where the computer program enables a computer to execute any one of the above-mentioned first methods for determining DMRS resources.

An embodiment of the present application provides a computer-readable storage medium for storing a computer program, where the computer program enables a computer to execute any one of the above methods for determining a second DMRS resource.

Embodiments of the present application provide a computer program product comprising computer program instructions that cause a computer to perform any of the above-described first method of DMRS resource determination.

Embodiments of the present application provide a computer program product, comprising computer program instructions, which cause a computer to execute any one of the above-described methods for determining DMRS resources.

Embodiments of the present application provide a computer program that causes a computer to perform any one of the above-described methods for determining DMRS resources.

Embodiments of the present application provide a computer program, which causes a computer to execute any one of the above methods for determining a second DMRS resource.

The embodiment of the application can ensure that the setting of the DMRS symbols is more reasonable by determining the position of the DMRS resources in a plurality of symbols which correspond to at least two transmissions, thereby reducing the expenditure of the DMRS and improving the utilization rate of time domain resources.

Drawings

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

Fig. 2 is a flowchart of an implementation 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 a first embodiment 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 a PUSCH DMRS symbol position 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 a PUSCH DMRS symbol position determined according to embodiment 3 of the present application.

Fig. 8 is a schematic diagram of a PUSCH DMRS symbol position 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 an implementation 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 block diagram of a network device 1200 according to an embodiment of the present application.

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

Fig. 14 is a schematic block 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 Description

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

It should be noted that the terms "first," "second," and the like in the description and claims of the embodiments of the present application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. The objects described in the "first" and "second" may be the same or different.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an Advanced Long Term Evolution (LTE-a) System, a New Radio (NR) System, an Evolution System of an NR System, an LTE (LTE-based Access to unlicensed spectrum, LTE-U) System on unlicensed spectrum, an NR (NR-based Access to unlicensed spectrum, UMTS (Universal Mobile telecommunications System), a Wireless Local Area network (WiFi-5) System, or other Wireless communication systems.

Generally, the conventional Communication system supports a limited number of connections and is easy to implement, however, with the development of Communication technology, the mobile Communication system will support not only conventional Communication but also, for example, device-to-Device (D2D) Communication, machine-to-Machine (M2M) Communication, machine Type Communication (MTC), and Vehicle-to-Vehicle (V2V) Communication, and the embodiments of the present application can also be applied to these Communication systems.

Optionally, the communication system in the embodiment of the present application may be applied to a Carrier Aggregation (CA) scenario, may also be applied to a Dual Connectivity (DC) scenario, and may also be applied to an independent (SA) networking scenario.

The frequency spectrum of the application is not limited in the embodiment of the present application. For example, the embodiments of the present application may be applied to a licensed spectrum, and may also be applied to an unlicensed spectrum.

The embodiments of the present application are described in conjunction with a network device and a terminal device, where: a terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment, etc. The terminal device may be a Station (ST) in a WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, and a next generation communication system, for example, a terminal device in an NR Network or a terminal device in a future-evolution Public Land Mobile Network (PLMN) Network, and the like.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application function, and need to be matched with other equipment such as a smart phone for use, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

The network device may be a device for communicating with a mobile device, and the network device may be an Access Point (AP) in a WLAN, a Base Station (BTS) in GSM or CDMA, a Base Station (NodeB, NB) in WCDMA, an evolved Node B (eNB, eNodeB) in LTE, a relay Station or an Access Point, or a vehicle-mounted device, a wearable device, a network device (gNB) in an NR network, or a network device in a PLMN network for future evolution, and the like.

In this embodiment of the present application, a network device provides a service for a cell, and a terminal device communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), micro cells (Micro cells), pico cells (Pico cells), femto cells (Femto cells), and the like, and the small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services.

Fig. 1 exemplarily shows one network device 110 and two terminal devices 120, and optionally, the wireless communication system 100 may include a plurality of network devices 110, and each network device 110 may include other numbers of terminal devices 120 within the coverage area, which is not limited in this embodiment of the present invention. The embodiment of the present application may be applied to one terminal device 120 and one network device 110, and may also be applied to one terminal device 120 and another terminal device 120.

Optionally, the wireless communication system 100 may further include other network entities such as a Mobility Management Entity (MME), an Access and Mobility Management Function (AMF), which is not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the prior art, the channel is repeatedly transmitted (retransmission), and the time domain resource allocation of each transmission is the same. The corresponding DMRS resources are also time domain resources that are determined separately for each transmission. For example, the transmission of a Physical Downlink Shared CHannel (PDSCH) includes the transmission of a DMRS for demodulating the PDSCH by a terminal. The time frequency resource of the DMRS is located in the scheduling resource range of the PDSCH, and the PDSCH does not occupy the symbol carrying the DMRS. And configuring the time-frequency domain resource position of the DMRS through high-level parameters.

The time domain resource locations of the PDSCH DMRS include a preamble (loaded) DMRS and an additional (additional) DMRS. The time domain position of the preamble DMRS is related to a PDSCH mapping type (mapping type). For PDSCH mapping type a, the time domain Position of the preamble DMRS is determined by a higher layer parameter DMRS-type a-Position, DMRS-type a-Position = 'pos2' and 'pos3' respectively represent the first symbol Position l of the preamble DMRS ₀ The reference points for =2 and 3,l are the starting symbols of the slot. For PDSCH mapping type B, the first symbol position l of the pre-DMRS ₀ The reference point of =0,l is the starting symbol of the scheduled PDSCH. The additional DMRS is configured by a higher layer parameter, DMRS-additionposition. DMRS-AdditionalPosition may indicate that additional DMRS positions = { pos0,pos1, pos3, when DMRS-additionposition is not configured, then additional DMRS position = pos2. Meanwhile, for the preamble DMRS, the preamble DMRS is further divided into two types, namely a single-symbol (single-symbol) type and a double-symbol (double-symbol) type, which indicate whether the number of symbols included in the DMRS is one or two. If the high-layer parameter maxLength is not configured, the high-layer parameter maxLength is of a single type, and if the high-layer parameter maxLength is configured, whether the high-layer parameter maxLength is a single or a double is determined according to the indication 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 the DMRS-additional position is configured as pos2, the symbol in which the DMRS is located includes a symbol in which the DMRS is located in front and

symbols

6 and 9 in which the additional DMRS is located.

TABLE 1

The PUSCH DMRS also includes a preamble DMRS and an additional DMRS, and the time and frequency domain locations thereof are configured in a similar manner to the PDSCH DMRS. Table 2 is a corresponding table of PUSCH DMRS symbol positions.

TABLE 2

In the NR system, in order to support a high-reliability and low-latency (URLLC) service, uplink data transmission repeat transmission is employed to improve transmission reliability. The repeated transmission of the PUSCH includes two types: a PUSCH repetition Type a and a PUSCH repetition Type B. The PUSCH repetition type is determined by a higher layer signaling indication. For PUSCH repetition Type a and Type B, the time domain resource allocation of PUSCH is in different ways:

-PUSCH repetition Type a: the starting symbol S of the PUSCH and the number L of consecutive symbols from the symbol S are determined by a Starting Length Indicator (SLIV) indicated in the PDCCH.

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

For PUSCH repetition Type a, the UE repeatedly transmits the same transport block for K consecutive slots. The symbol allocation in each slot is the same, i.e. the symbol allocation in the slot indicated by startsymbol andlength. For PUSCH repetition Type B, K transmissions of PUSCH are in slot K _s Starts with the transmission of K · L consecutive symbols, each transmission comprising L symbols. In the 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 the PUSCH, DMRS time domain resources are configured independently for each transmission, the resource utilization rate is not high, and especially when the number of symbols transmitted each time is small, the cost of the DMRS is high. Similar problems may exist in other CHannel transmissions in the prior art, such as PDSCH or Physical Uplink Control CHannel (PUCCH), etc.

An embodiment of the present application provides a method for determining DMRS resources, and fig. 2 is a flowchart of an implementation of the method 200 for determining DMRS resources according to the embodiment of the present application, which may optionally be applied to the system shown in fig. 1, but is not limited thereto. The method includes at least some of the following.

S210: the terminal equipment determines a plurality of symbols according to the transmission times of the channel and the time domain resource allocation information, wherein the plurality of symbols comprise at least one symbol in symbols corresponding to at least two transmissions;

s220: the terminal device determines a location of the DMRS in the plurality of symbols.

In some embodiments, the symbol corresponding to the transmission includes a symbol allocated by the time domain resource allocation information for each repeated transmission of the channel. For example, the slot resource allocation information indicates a starting symbol S of channel transmission and a number L of consecutive symbols starting from the starting symbol S, the number of times of channel transmission is K, the channel repeat transmission of the terminal device starts at the symbol S of the slot Ks and transmits on consecutive K · L symbols, each transmission including L symbols ("·" indicates a multiplier). Step S210 determines a plurality of symbols according to the transmission times of the channel and the time domain resource allocation information, where the plurality of symbols at least include symbols corresponding to two transmissions, where the symbols include valid symbols and invalid symbols, or only include valid symbols.

Optionally, the valid symbols include symbols used for transmission of the channel, and the invalid symbols include symbols not used for transmission of the channel. For example, a valid symbol refers to the symbol actually used for the channel transmission; an invalid symbol refers to a symbol that, although allocated for transmission on the channel, is indicated as a downlink signal or is indicated as an invalid symbol by a higher layer parameter (e.g., invalidSymbolPattern), etc., resulting in a symbol that cannot be actually used for transmission on the channel. In some embodiments, the invalid symbol is determined by indication information of the network device, and the invalid symbol is related to a time domain resource allocation of the channel, e.g., the invalid symbol belongs to a partial symbol of symbols indicated in the time domain resource allocation information of the channel.

The plurality of determined symbols may take a variety of forms: for example, the plurality of symbols includes K · L symbols corresponding to channel repetition transmissions of the terminal device; for another example, the plurality of symbols include a partial symbol of K · L symbols corresponding to channel repeat transmission of the terminal device; as another example, the plurality of symbols includes K · L valid symbols starting from a start position of a first channel repetition transmission; as another example, the plurality of symbols includes K · L valid symbols from a start position of the first channel repeated transmission, and invalid symbols existing between the first valid symbol and the last valid symbol.

In some embodiments, the step S220 includes:

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

and determining the position of the DMRS in the plurality of symbols according to the number of the symbols contained in the plurality of symbols, the configuration parameter and the first corresponding relation of the DMRS symbol positions.

The DMRS may include a preamble DMRS, or a preamble DMRS and an additional DMRS.

In the foregoing manner, in the embodiments of the present application, the symbol position of the DMRS is determined in the plurality of symbols. Optionally, the predefined rule includes symbol positions of the pre-DMRSs, and intervals between the DMRSs; according to the predefined rule, the terminal device may determine the symbol position of the preamble DMRS in the plurality of symbols, and determine the symbol position where the additional DMRS is located and the number of the additional DMRSs in the plurality of symbols according to the interval. For example, the predefined rules include: the symbol position of the preamble DMRSs is 0, and the interval between DMRSs is 5 symbols. When the positions of the DMRSs are determined in 28 symbols, a plurality of DMRSs may be determined according to the predefined rule, where the positions of the DMRSs in the 28 symbols are: 0. 5, 10, 15, 20, 25. Including one preamble DMRS and 5 additional DMRSs.

In some embodiments, the first correspondence of DMRS symbol positions includes a correspondence of the DMRS symbol positions to the number of symbols included in the plurality of symbols and the configuration parameter. For example, when the number of symbols is 16 and the configuration parameter DMRS-additional position = 'pos2', the symbol position of the corresponding DMRS is

l

₀ 5, 10, wherein l ₀ Symbol position, l, for preamble DMRS ₀ The value of (b) may be 0;5 and 10 are symbol positions of the additional DMRS. According to the first correspondence, after determining the number of symbols included in the plurality of symbols and receiving the configuration parameter, the terminal device may determine the position of the DMRS in the plurality of symbols. The specific values and parameters in the first corresponding relationship are only examples, and the embodiments of the present application do not limit the specific values and parameters.

The present embodiment is applicable to a case where the plurality of symbols include an effective symbol and an ineffective symbol, and also applicable to a case where the plurality of symbols include only an effective symbol.

For the case that the plurality of symbols include valid symbols and invalid symbols, the embodiments of the present application also propose a manner of determining a DMRS location in the plurality of symbols. Optionally, when the plurality of symbols include a valid symbol and an invalid symbol, the step S220 includes:

determining the position of the DMRS in the effective symbols in the plurality of symbols according to a predefined rule; and/or the presence of a gas in the gas,

and determining the position of the DMRS in the plurality of symbols according to the number of the effective symbols contained in the plurality of symbols, the configuration parameter and the second corresponding relation of the DMRS symbol positions.

The DMRSs may include a preamble DMRS, or include a preamble DMRS and an additional DMRS.

In the foregoing manner, in the embodiments of the present application, the symbol position of the DMRS is determined in the effective symbols included in the plurality of symbols. Optionally, the predefined rule includes a symbol position of the preamble DMRSs, and an interval between the DMRSs; according to the predefined rule, the terminal device may determine a symbol position of the preamble DMRS in the effective symbols of the plurality of symbols, and determine a symbol position of the effective symbols of the additional DMRS and the number of the additional DMRSs in the effective symbols according to the interval. For example, the predefined rules include: the symbol position of the preamble DMRSs is 0, and the interval between DMRSs is 5 symbols. The 28 symbols comprise 24 effective symbols, and the position of the DMRS in the effective symbols is determined; according to the predefined rule, a plurality of DMRSs can be determined, and the positions of the DMRSs in the 24 effective symbols are respectively as follows: 0. 5, 10, 15 and 20. Including one preamble DMRS and 4 additional DMRSs. Since the positions of the effective symbols in the plurality of symbols are determined, the positions of the DMRS in the plurality of symbols can be determined.

In some embodiments, the second correspondence of DMRS symbol positions includes a correspondence of the DMRS symbol positions to the number of effective symbols included in the plurality of symbols and the configuration parameter. For example, when the number of valid symbols is 24 and the configuration parameter DMRS-additional position = 'pos2' is set in 28 symbols, the symbol position of the corresponding DMRS is

l

₀ 5, 10, 15, 20, wherein l ₀ Symbol position, l, for preamble DMRS ₀ The value of (b) may be 0; 5. 10, 15, 20 are positions in the effective symbol to which DMRS is attached. According to the second correspondence, after determining the number of effective symbols included in the plurality of symbols and receiving the configuration parameters, the terminal device may determine the position of the DMRS in the effective symbols of the plurality of symbols; since the positions of the effective symbols in the plurality of symbols are determined, the positions of the DMRSs in the plurality of symbols can be determined. It should be understood that the specific values and parameters in the second corresponding relationship are only examples, and the embodiments of the present application do not limit the specific values and parameters.

The multiple symbols may also be grouped, and the position of the DMRS in each symbol group may be determined. Specifically, the method comprises the following steps:

in some embodiments, the step S220 includes:

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

determining the position of the DMRS in each symbol group according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, the configuration parameters and the third corresponding relation of the DMRS symbol positions.

In some embodiments, the number of symbols in the symbol group is the same or different. Each symbol group includes at least one symbol of the corresponding symbols transmitted at least twice.

In the foregoing manner, in the embodiments of the present application, the symbol position of the DMRS is determined in the symbols included in each symbol group. Optionally, the predefined rule includes a symbol position of the preamble DMRSs, and an interval between the DMRSs; according to the predefined rule, the terminal device may determine a symbol position of a preamble DMRS in symbols included in a symbol group, and determine a symbol position where the additional DMRS is located and the number of the additional DMRSs in the symbol group according to the interval. For example, the predefined rules include: the symbol position of the preamble DMRS is 0, and the interval between DMRSs is 5 symbols. If one symbol group contains 12 symbols, according to the predefined rule, it can be determined that the positions of the DMRS in the symbol group are: 0. 5, 10. Including one preamble DMRS and 2 additional DMRSs. And respectively determining the positions of the DMRS in each symbol group in the same way, and integrating the position information in all the symbol groups to determine the positions of the DMRS in the symbols.

In some embodiments, the third correspondence of DMRS symbol positions includes a correspondence of the symbol positions of the DMRS to the number of symbols contained in the symbol group and the configuration parameter. For example, when a symbol group includes 14 symbols and the configuration parameter DMRS-additional position = 'pos2', the symbol position of the corresponding DMRS is

l

₀ 7, 11, wherein l ₀ Symbol position, l, for preamble DMRS ₀ May be 0; 7. and 11 is a position in a symbol group to which the DMRS is attached. According to the third correspondence, after determining the number of symbols included in the symbol group and receiving the configuration parameters, the terminal device may determine the position of the DMRS in the symbol group; and integrating the position information in all symbol groups to determine the positions of the DMRS in the plurality of symbols. It should be understood that the specific values and parameters in the third corresponding relationship 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 use a DMRS symbol position correspondence in the prior art, for example, a mapping table of PUSCH DMRS symbol positions shown in table 2, to determine the positions of DMRSs in the symbol groups.

The present embodiment is applicable to a case where the plurality of symbols include a valid symbol and an invalid symbol, and also to a case where the plurality of symbols include only a valid symbol.

In some embodiments, when the plurality of symbols includes a valid symbol and an invalid symbol, the step S220 includes:

dividing effective symbols in the plurality of symbols into at least two symbol groups;

determining the position of the DMRS in each symbol group according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of the symbols contained in each symbol group, the configuration parameter and the fourth corresponding relation of the DMRS symbol positions.

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

In the foregoing manner, in the embodiments of the present application, effective symbols included in a plurality of symbols are grouped, and the symbol position of the DMRS is determined in symbols (including only effective symbols) included in each symbol group. Optionally, the predefined rule includes a symbol position of the preamble DMRSs, and an interval between the DMRSs; according to the predefined rule, the terminal device may determine the symbol position of the pre-DMRS in the symbols included in the symbol group, and determine the symbol position where the additional DMRS is located and the number of the additional DMRSs in the symbol group according to the interval. For example, the predefined rules include: the symbol position of the preamble DMRSs is 0, and the interval between DMRSs is 5 symbols. If a symbol group contains 12 symbols, according to the predefined rule, it can be determined that the positions of DMRS in the symbol group are: 0. 5 and 10. Including one preamble DMRS and 2 additional DMRSs. Respectively determining the positions of the DMRS in each symbol group in the same way, and integrating the position information of the DMRS in all the symbol groups to determine the positions of the DMRS in all the symbol groups; since the positions of the effective symbols included in the symbol group in the plurality of symbols are determined, the positions of the DMRS in the plurality of symbols can be determined.

In some embodiments, the fourth correspondence of DMRS symbol positions includes a correspondence of the symbol positions of the DMRS to the number of effective symbols contained in the symbol group and the configuration parameter. For example, when a symbol group includes 12 symbols and the configuration parameter DMRS-additional position = 'pos2', the symbol position of the corresponding DMRS is

l

₀ 6, 9 wherein ₀ Symbol position, l, for preamble DMRS ₀ May be 0; 6.and 9 is a position in a symbol group to which a DMRS is attached. According to the fourth correspondence, after determining the number of symbols included in the symbol group and receiving the configuration parameters, the terminal device may determine the position of the DMRS in the symbol group; integrating the positions of all the symbol groups of the DMRS, so as to determine the position of the DMRS in the effective symbols in the plurality of symbols; and further determining the positions of the DMRS in the plurality of symbols according to the positions of the effective symbols in the plurality of symbols. It should be understood that the specific values and parameters in the fourth corresponding relationship 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 use a corresponding relationship of DMRS symbol positions in the prior art, for example, a corresponding table of PUSCH DMRS symbol positions shown in table 2, to determine the positions of DMRS in the symbol groups.

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

In some embodiments, the terminal device divides the plurality of symbols into at least two symbol groups according to a predefined manner and/or a signaling indication. The present embodiment is applicable to a case where the plurality of symbols include an effective symbol and an ineffective symbol, and also applicable to a case where the plurality of symbols include only an effective symbol.

In some embodiments, when the plurality of symbols include valid and invalid symbols, the terminal device divides valid symbols of the plurality of 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 plurality of symbols is K · L; wherein,

k is the transmission times of the channel;

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

Among the K · L symbols, a valid symbol may be included, or a valid symbol and an invalid symbol may be included.

Or, in some embodiments, when the plurality of symbols includes valid symbols and invalid symbols, the number of symbols of the valid symbols is K · L; wherein,

k is the transmission frequency of the channel;

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

Optionally, the CHannel includes a PUSCH, a Physical Downlink Shared CHannel (PDSCH), or a Physical Uplink Control CHannel (PUCCH).

The present application will now be described in detail by way of specific examples with reference to the accompanying drawings. In the following embodiments, a PUSCH channel is taken as an example, and the DMRS resource determination method proposed in the embodiments of the present application may also be applied to other channels, such as a PDSCH, a PUCCH, and the like.

Example 1:

and determining K.L symbols according to the transmission times K and the number L of symbols corresponding to each transmission carried in the time domain resource allocation information of the PUSCH. And determining the time domain resources of the DMRS according to the K & L symbols. Where "·" denotes a multiplication number. All of the K & L symbols are valid symbols, or the K & L symbols include valid symbols and invalid symbols.

Taking PUSCH repetition Type B as an example, K transmissions of PUSCH start at symbol S of the Ks slot and are transmitted over K · L consecutive symbols, each transmission comprising L symbols. Taking fig. 3 as an example, K =4 and l =4, starting from the start symbol S of the start slot Ks, all of the consecutive 16 symbols are valid symbols, i.e. symbols where PUSCH transmission is located.

For each PUSCH transmission, according to the prior art, the symbol in which the DMRS is located is determined on L symbols, respectively. The value range of L is {1, \8230;, 14}. In the prior art, on L symbols scheduled by the PUSCH, a symbol in which a DMRS is located at least includes a preamble DMRS, and an additional DMRS may be further configured. When L is small, DMRS overhead is large. In the prior art, the DMRS configuration is related to L, for example, in a mapping table of PUSCH DMRS symbol positions, for a PUSCH mapping type (mapping type) B, when L is less than or equal to 4, only symbols of a preamble DMRS may exist. As L increases, more symbols of the additional DMRS may be configured. As shown in fig. 4, when the number of symbols per transmission, L =4, the symbol position of the DMRS is the first symbol of the L symbols. In fig. 4, the rectangles filled with diagonal lines are DMRS symbols.

In this embodiment, the symbol arrangement of the DMRS is not configured separately in L symbols transmitted at a time, but symbol positions of the DMRS are configured in K · L symbols as a whole. In a symbol set containing K.L symbols, symbols of the DMRS are configured, and the symbols comprise a preposed DMRS or the preposed DMRS and an additional DMRS.

And after K and L are determined, determining the symbol where the DMRS is located according to the specific values. For example, the K · L symbols include a preamble DMRS symbol and several additional DMRSs, and the number and positions of the additional DMRSs depend on the number of K · L. The following method may be used to determine the symbols where the DMRS is located:

-according to predefined rules: the symbol position of the DMRS is determined according to the symbol position of the preposed DMRS configured by a high layer and the number of K & L symbols, for example, the symbol position or the number of the additional DMRS is determined according to a certain interval.

-signaling, according to the configuration of the network: similar to the prior art, a corresponding table of DMRS symbol positions is preset, and the symbol positions of the DMRS are determined according to the configuration parameter DMRS-additional position and the number K.L of symbols for repeatedly transmitting PUSCH. For example, K has a value of 1, 2, 4, 7, 12, 16, L has a value of 2, 4, 7, K · L includes 2, 4, 7, 8, 14, 16, 24, 28, 32, 48, 49, 64, 84, 112. Corresponding tables of DMRSs are set for the numbers of these symbols, respectively, 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 higher layer configuration parameters. It should be noted that the above table is only an example, and the specific values in the table are not limited.

Taking fig. 5 as an example, L =4,k =4, and symbol positions of DMRSs are configured on 16 symbols. Taking the above table 3 as an example, when the higher layer parameter DMRS-additive position = 'pos2', the symbol position of the DMRS is as shown in fig. 5, and the rectangles filled with oblique lines in fig. 5 are DMRS symbols. It can be seen that the configuration of the symbol positions of the DMRS is configured by a higher layer parameter according to the length of 16 symbols as a whole.

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

Example 2:

when the K & L symbols include an effective symbol and an ineffective symbol, configuring a symbol position of the DMRS in the effective symbol of the K & L symbols; since the positions of the effective symbols in the K · L symbols are determined, the positions of the DMRS in the K · L symbols can be further determined.

Conventionally, taking PUSCH repetition Type B as an example, K transmissions of PUSCH are transmitted on K · L consecutive symbols, each transmission including L symbols. The K · L symbols are the symbols on which the nominal K transmissions are located. In fact, since there may be some invalid symbols on consecutive K · L symbols, if some symbols are indicated as downlink symbols, or some symbols are indicated as invalid symbols by the high-layer parameter InvalidSymbolPattern. At this time, the invalid symbols are not used for repeated transmission of the PUSCH, and the remaining symbols excluding the invalid symbols among the K · L symbols are used for transmission of the PUSCH repetition Type B. A transmission nominally containing L symbols may be split into one or more actual transmissions because of invalid symbols, each actual transmission containing consecutive valid symbols. When the number of valid symbols included in one actual transmission is 1, the actual transmission is cancelled unless L = 1. DMRS symbols are set for each actual transmission. This may cause the overhead of DMRS to be very large. Taking fig. 6 as an example, L =7, k =4, includes 4 null symbols, each nominal transmission is divided into two actual transmissions by the null symbols, and each actual transmission determines the symbol position of the DMRS as the first symbol of the actual transmission according to L' = 3. In fig. 6, the rectangles filled in dark gray are invalid symbols, and the rectangles filled with diagonal lines are DMRS symbols.

In the present embodiment, the symbol position of the DMRS is arranged in an effective symbol among K · L symbols, taking into account the presence of an ineffective symbol. Specifically, a symbol set containing K.L symbols is determined according to the values of K and L; determining an effective symbol set in symbol sets of K & L symbols according to high-layer configuration information or physical layer signaling; and determining the symbol position of the DMRS in the effective symbol set according to the effective symbol set and high-layer configuration information or physical layer signaling. A specific method of determining the DMRS may employ a similar method as in embodiment 1, except that the symbol position of the DMRS is determined from the effective symbols among the K · L symbols. As shown in fig. 7, the number of effective symbols in L =7, k =4, k · L symbols is 24, and the symbol position of the DMRS in the effective symbol set is determined based on the 24 symbols and the higher layer configuration information or the physical layer signaling. In fig. 7, the dark gray filled rectangles are null symbols, and the slashed filled rectangles are DMRS symbols.

Compared with the prior art, the method provided by the embodiment of the application has less DMRS overhead, and the demodulation performance of the PUSCH can be ensured. Compared with the embodiment 1, the embodiment can further determine the position of the DMRS symbol according to the effective symbol set, the sending symbol of the DMRS is more reasonable in arrangement, the overhead of the DMRS is further reduced, and the time domain resource utilization rate is higher.

Example 3:

and determining time domain resources of the DMRS according to a part of the K & L symbols. All of the K & L symbols are valid symbols, or the K & L symbols include valid symbols and invalid symbols.

The present embodiment can adopt the following two ways:

in a first method, K · L symbols are divided into a plurality of symbol groups, and each symbol group is configured with a symbol position of a DMRS. The number of symbols in each symbol group may be the same or different. The symbols included within each symbol group include at least one of the symbols corresponding to one or more of the K transmissions of the PUSCH. And configuring symbol positions of the DMRS in each symbol group, wherein the symbol positions comprise a preamble DMRS, or the preamble DMRS and an additional DMRS. The embodiment may determine the symbol position of the DMRS in the effective symbol set according to the effective symbol set and higher layer configuration information or physical layer signaling.

Taking fig. 8 as an example, the 28 symbols are divided into two symbol groups, each symbol group including 14 symbols. In this embodiment, a preset corresponding table of DMRS symbol positions is used, and symbol positions of DMRSs are determined in 14 symbols of each symbol group according to a configuration parameter and the number of symbols included in the symbol group, which may refer to table 2, and when a higher layer parameter DMRS-additive position = 'pos2', relative symbol positions of DMRSs in the symbol groups are 0, 7, and 11. Alternatively, referring to table 3, when the higher layer parameter DMRS-additional position = 'pos2', the relative symbol positions of the DMRS within the symbol group are 0, 4, 8, 12. The above is exemplified by the symbols in two symbol groups containing the same number, the number of symbols contained in each symbol group may be the same or different, and the embodiment of the present application does not limit this.

In the second mode, when the K · L symbols include an effective symbol and an invalid symbol, the effective symbol in the K · L symbols is divided into a plurality of symbol groups, and each symbol group configures a symbol position of the DMRS. As shown in fig. 8, which includes 24 valid symbols, 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 12 effective symbols of each symbol group. In this embodiment, a preset corresponding table of DMRS symbol positions is used, and the symbol positions of DMRSs are determined in each symbol group according to the configuration parameters and the number of symbols (all effective symbols) included in the symbol group. Referring to table 2, when the higher layer parameter DMRS-additional position = 'pos2', the relative symbol positions of the DMRS within each symbol group are 0, 6, 9. The above is exemplified by two symbol groups including the same number of effective symbols, and the number of effective symbols included in each symbol group may be the same or different, which is not limited in the embodiment of the present application.

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

Compared with

embodiments

1 and 2, the DMRS symbol positions can be further determined according to the divided symbol groups, the DMRS transmission symbol setting is more reasonable, DMRS overhead is further reduced, and time domain resource utilization is higher.

Example 4:

and determining K.L symbols according to the transmission times K and the number L of symbols corresponding to each transmission carried in the time domain resource allocation information of the PUSCH. K · L symbols are consecutive valid symbols. Alternatively, valid symbols are determined starting from the starting symbol S, skipping the symbol when an invalid symbol is encountered continues to determine the next valid symbol until K · L valid symbols have been determined.

After the K · L symbols are determined, the symbol positions of the DMRSs may be configured from the K · L symbols in at least two ways.

The first method is as follows: the symbol position of the DMRS is determined according to the symbol position of the preposed DMRS configured in the higher layer and the number of K.L symbols, for example, the symbol position or the number of the additional DMRS is determined according to a certain interval. Or, a corresponding table of DMRS symbol positions is preset, and the symbol positions of the DMRS are determined according to the configuration parameters (e.g., DMRS-additive position) and the determined K · L symbols.

The second method comprises the following steps: the K · L symbols are divided into symbol groups, each of which may contain the same or different number of symbols. Symbol positions of the DMRSs are respectively determined in each symbol group. When determining the symbol positions of the DMRSs in each symbol group, the symbol positions of the DMRSs may be determined according to the symbol positions of the pre-DMRSs configured by a higher layer and the number of symbols in the symbol group, for example, the symbol positions or the number of additional DMRSs may be determined at certain intervals. Or, a corresponding table of DMRS symbol positions is preset, and the symbol positions of the DMRSs in the symbol group are determined according to a configuration parameter (e.g., DMRS-added position) and the symbols in the symbol group.

Example 5:

and determining (K.L + N) symbols according to the transmission times K and the number L of symbols corresponding to each transmission carried in the time domain resource allocation information of the PUSCH, wherein N is a positive integer. Including K · L valid symbols, and N invalid symbols interspersed between the first to the last valid symbols. For the determination of valid symbols, alternatively, valid symbols are determined starting from the starting symbol S, and when an invalid symbol is encountered, the symbol is skipped and determination of the next valid symbol is continued until K · L valid symbols are determined.

After (K · L + N) symbols are determined, the symbol positions of the DMRSs may be configured from the (K · L + N) symbols in at least the following four manners.

The method I comprises the following steps:

the symbol position of the DMRS is determined based on the symbol position of the preamble DMRS allocated in the higher layer and the number of (K · L + N) symbols, and for example, the symbol position or the number of the additional DMRSs is determined at a predetermined interval. Or, a corresponding table of DMRS symbol positions is preset, and the symbol positions of DMRSs are determined according to the configuration parameters (e.g., DMRS-additive position) and the determined (K · L + N) symbols.

The second method comprises the following steps:

the symbols (K · L + N) are divided into a plurality of symbol groups, and each symbol group is configured with a symbol position of a DMRS. When determining the symbol positions of the DMRSs in each symbol group, the symbol positions of the DMRSs may be determined according to the symbol positions of the pre-DMRSs configured by a higher layer and the number of symbols in the symbol group, for example, the symbol positions or the number of additional DMRSs may be determined at certain intervals. Or, a corresponding table of DMRS symbol positions is preset, and the symbol positions of the DMRSs in the symbol group are determined according to a configuration parameter (e.g., DMRS-additive position) and symbols in the symbol group.

The third method comprises the following steps:

the symbol position of the DMRS is determined in an effective symbol among (K · L + N) symbols. Alternatively, the symbol position of the DMRS is determined according to the symbol position of the preamble DMRS configured in the higher layer and the number of K · L effective symbols, for example, the symbol position or the number of the additional DMRSs is determined at a certain interval. Or presetting a corresponding table of DMRS symbol positions, and determining the positions of the DMRS in the effective symbols according to the configuration parameter DMRS-additional position and K.L effective symbols in the (K.L + N) symbols; and further determining the position of the DMRS in the (K.L + N) symbols according to the position of the effective symbol in the (K.L + N) symbols.

The method four comprises the following steps:

dividing K & L effective symbols in (K & L + N) symbols into a plurality of symbol groups, and respectively configuring symbol positions of DMRSs in each symbol group. When determining the symbol positions of the DMRSs in each symbol group, the symbol positions of the DMRSs may be determined according to the symbol positions of the preamble DMRSs configured by the higher layer and the number of effective symbols in the symbol group, for example, the symbol positions or the number of additional DMRSs may be determined at certain intervals. Or, presetting a corresponding table of DMRS symbol positions, and determining the symbol positions of the DMRS in the symbol group according to the configuration parameter DMRS-additional position and the effective symbols in the symbol group; and further determining the positions of the DMRS in the (K.L + N) symbols according to the positions of the DMRS in each symbol group and the positions of the effective symbols in the (K.L + N) symbols.

In this embodiment, K · L effective symbols are determined according to the number of transmission times K and the number L of symbols corresponding to each transmission carried in the time domain resource allocation information of the PUSCH. Alternatively, a valid symbol is determined starting from the starting 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 have been determined. As shown in fig. 9, L =7,k =4, the higher layer parameter configures the position of the invalid symbol, but the number of valid symbols for PUSCH transmission is still 28. In fig. 9, the dark gray filled rectangles are invalid symbols, and the plurality of symbols for PUSCH transmission in fig. 9 includes 28 valid symbols and 4 invalid symbols interspersed between the first valid symbol and the last valid symbol.

The embodiment ensures the number of symbols for PUSCH transmission and improves the reliability of PUSCH transmission.

An embodiment of the present application further provides a method for determining DMRS resources, and fig. 10 is a flowchart of an implementation of the method 1000 for determining DMRS resources according to the embodiment of the present application, which may be optionally applied to the system shown in fig. 1, but is not limited thereto. The method includes at least part of the following.

S1010: the network equipment determines a plurality of symbols according to the transmission times of the channel and the time domain resource allocation information, wherein the plurality of symbols comprise at least one symbol in symbols corresponding to at least two transmissions;

s1020: the network device determines a location of the DMRS in the plurality of symbols.

Optionally, the plurality of symbols include valid symbols and invalid symbols; alternatively, the plurality of symbols may include valid symbols.

Optionally, the valid symbols include symbols used for transmission of the channel, and the invalid symbols include symbols not used for transmission of the channel.

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

and determining the position of the DMRS in the plurality of symbols according to the number of the symbols contained in the plurality of symbols, the configuration parameters and the first corresponding relation of the positions of the DMRS symbols.

In some embodiments, when the plurality of symbols includes a valid symbol and an invalid symbol,

determining a position of the DMRS in an effective symbol among the plurality of symbols according to a predefined rule; and/or the presence of a gas in the atmosphere,

and determining the position of the DMRS in the plurality of symbols according to the number of the effective symbols contained in the plurality of symbols, the configuration parameters and the second corresponding relation of the DMRS symbol positions.

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

dividing effective symbols of the plurality of symbols into at least two symbol groups;

Optionally, the method further includes: and the network equipment sends the configuration parameters to the terminal equipment.

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

Optionally, the symbol group includes at least one of the symbols corresponding to at least two transmissions.

Optionally, the method further includes: and the network equipment sends the signaling indicating the symbol group division method to the terminal equipment.

Optionally, the DMRS comprises a preamble DMRS; alternatively, the DMRSs may include a preamble DMRS and an additional DMRS.

k is the transmission frequency of the channel;

In some embodiments, when the plurality of symbols include valid symbols and invalid symbols, the number of symbols of the valid symbols is K · L; wherein,

k is the transmission frequency of the channel;

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

An embodiment of the present application further provides a terminal device, and fig. 11 is a schematic structural diagram of a terminal device 1100 according to the embodiment of the present application, including:

a first symbol determining module 1110, configured to determine a plurality of symbols according to the transmission times of the channel and the time domain resource allocation information, where the plurality of symbols include at least one of symbols corresponding to at least two transmissions;

a first location determining module 1120 is configured to determine a location of a demodulation reference signal DMRS in the plurality of symbols.

Optionally, in an embodiment of the present application, the plurality of symbols include valid symbols and invalid symbols; alternatively, the plurality of symbols includes a valid symbol.

Optionally, in this embodiment of the present application, the valid symbol includes a symbol used for transmission of the channel, and the invalid symbol includes a symbol not used for transmission of the channel.

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

determining a position of the DMRS in the plurality of symbols according to a predefined rule; and/or the presence of a gas in the atmosphere,

Optionally, in this embodiment of the application, the first position determining module 1120 is configured to: when the plurality of symbols includes a valid symbol and an invalid symbol,

and determining the position of the DMRS in the plurality of symbols according to the number of effective symbols contained in the plurality of symbols, the configuration parameters and the second corresponding relation of the positions of the DMRS symbols.

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

determining the position of the DMRS in each symbol group according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of the symbols contained in each symbol group, the configuration parameters and the third corresponding relation of the positions of the DMRS symbols.

when the plurality of symbols includes a valid symbol and an invalid symbol,

determining the position of the DMRS in each symbol group according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, the configuration parameter and the fourth corresponding relation of the DMRS symbol positions.

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 of the symbols corresponding to at least two transmissions.

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

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

Optionally, in this embodiment of the present application, the number of the symbols is K · L; wherein,

k is the transmission frequency of the channel;

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

Optionally, in this embodiment of the application, when the plurality of symbols include valid symbols and invalid symbols, the number of symbols of the valid symbols is K · L; wherein,

k is the transmission frequency of the channel;

Optionally, in an embodiment of the present application, the DMRS includes a preamble DMRS; or,

the DMRS includes a preamble DMRS and an additional DMRS.

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

It should be understood that the above and other operations and/or functions of the modules in the terminal device according to the embodiment of the present application are respectively for implementing the corresponding flows of the terminal device in the method 200 of fig. 2, and are not described herein again for brevity.

An embodiment of the present application further provides a network device, and fig. 12 is a schematic structural diagram of a network device 1200 according to an embodiment of the present application, including:

a second symbol determining module 1210, configured to determine a plurality of symbols according to the transmission times of the channel and the time domain resource allocation information, where the plurality of symbols include at least one of symbols corresponding to at least two transmissions;

a second position determining module 1220, configured to determine a position of a demodulation reference signal DMRS in the plurality of symbols.

Optionally, in an embodiment of the present application, the plurality of symbols include valid symbols and invalid symbols; or,

the plurality of symbols includes valid symbols.

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

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

Optionally, in this embodiment of the application, the second position determining module 1220 is configured to: when the plurality of symbols includes a valid symbol and an invalid symbol,

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

determining the position of the DMRS in each symbol group according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of the symbols contained in each symbol group, the configuration parameter and the third corresponding relation of the DMRS symbol positions.

when the plurality of symbols includes a valid symbol and an invalid symbol,

Optionally, as shown in fig. 13, the network device provided 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 an embodiment of the present application, the method further includes: the signaling sending module 1340 is configured to send a signaling indicating the symbol group division method to the terminal device.

the DMRS includes a preamble DMRS and an additional DMRS.

k is the transmission frequency of the channel;

Optionally, in this 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 and other operations and/or functions of the modules in the network device according to the embodiment of the present application are respectively for implementing the corresponding flows of the network device in the method 1000 of fig. 10, and are not described herein again for brevity.

Fig. 14 is a schematic block 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. From memory 1420, processor 1410 may invoke and execute a computer program to implement the methods of the embodiments of the present application.

The memory 1420 may be a separate device from the processor 1410, or may be integrated into 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, and in particular, may transmit information or data to other devices or receive information or data transmitted by other devices.

The transceiver 1430 may include a transmitter and a receiver, among others. The transceiver 1430 may further include antennas, and the number of antennas may be one or more.

Optionally, the communication device 1400 may be a terminal device in the embodiment of the present application, and the communication device 1400 may implement a corresponding process implemented by the terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the communication device 1400 may be a network device in this embodiment, and the network device 1400 may implement a corresponding process implemented by the network device in each method in this embodiment, which is not described herein again for brevity.

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 a 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. From the memory 1520, the processor 1510 can call and execute a computer program to implement the method in the embodiment of the present application.

The memory 1520 may be a separate device from the processor 1510 or may be integrated into the processor 1510.

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

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

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

Optionally, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement a corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

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

The processors referred to above may be general purpose processors, digital Signal Processors (DSPs), field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), or other programmable logic devices, transistor logic devices, discrete hardware components, etc. The general-purpose processor mentioned above may be a microprocessor, or any conventional processor, etc.

The above-mentioned memories may be volatile or nonvolatile memories or may include both volatile and nonvolatile memories. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM).

It should be understood that the above memories are exemplary but not limiting, for example, the memories in the embodiments 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 (DDR SDRAM), enhanced synchronous SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for determining demodulation reference signal resources, comprising:

the terminal equipment determines a plurality of symbols according to the transmission times of the channel and the time domain resource allocation information, wherein the plurality of symbols comprise at least one symbol in symbols corresponding to at least two transmissions;

the terminal equipment determines the position of a demodulation reference signal (DMRS) in the plurality of symbols.
The method of claim 1, wherein,

the plurality of symbols comprises valid symbols and invalid symbols; or,

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

determining a location of the DMRS in the plurality of symbols according to a predefined rule; and/or the presence of a gas in the gas,

and determining the position of the DMRS in the plurality of symbols according to the number of the symbols contained in the plurality of symbols, the configuration parameters and the first corresponding relation of the DMRS symbol positions.
The method of any of claims 1 to 3, wherein when the plurality of symbols includes a valid symbol and an invalid symbol,

determining a position of the DMRS in a valid symbol among the plurality of symbols according to a predefined rule; and/or the presence of a gas in the gas,

and determining the positions of the DMRS in the plurality of symbols according to the number of effective symbols contained in the plurality of symbols, the configuration parameters and a second corresponding relation of the positions of the DMRS symbols.
The method according to any one of claims 1 to 3,

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

determining a position of the DMRS in each of the symbol groups according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, configuration parameters and a third corresponding relation of the DMRS symbol positions.
The method of any of claims 1 to 3, wherein when the plurality of symbols includes a valid symbol and an invalid symbol,

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

determining the position of the DMRS in each symbol group according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, the configuration parameters and the fourth corresponding relation of the DMRS symbol positions.
The method of claim 6 or 7, wherein the number of symbols in the set of symbols is the same or different.
The method of any of claims 6 to 8, wherein the set of symbols comprises at least one symbol of the corresponding symbols transmitted at least twice.
The method of 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 indication.
The method according to claim 7, wherein the terminal device divides the active symbols of the plurality of symbols into at least two symbol groups according to a predefined manner and/or signaling indication.
The method according to any one of claims 1 to 11,

the number of the symbols is K.L; wherein,

the K is the transmission frequency of the channel;

and the L is the number of symbols corresponding to each transmission and 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 includes valid symbols and invalid symbols, the number of symbols of the valid symbols is K-L; wherein,

the K is the transmission frequency of the channel;

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

the DMRS comprises a preamble DMRS; or,

the DMRS includes a preamble 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, comprising:

the network equipment determines a plurality of symbols according to the transmission times of the channel and the time domain resource allocation information, wherein the plurality of symbols comprise at least one symbol in symbols corresponding to at least two transmissions;

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

the plurality of symbols comprises valid symbols and invalid symbols; or,

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

determining a location of the DMRS in the plurality of symbols according to a predefined rule; and/or the presence of a gas in the gas,

and determining the position of the DMRS in the plurality of symbols according to the number of the symbols contained in the plurality of symbols, the configuration parameters and the first corresponding relation of the DMRS symbol positions.
The method of any one of claims 16 to 18, wherein when the plurality of symbols includes a valid symbol and an invalid symbol,

determining a position of the DMRS in an active symbol of the plurality of symbols according to a predefined rule; and/or the presence of a gas in the gas,

and determining the position of the DMRS in the plurality of symbols according to the number of the effective symbols contained in the plurality of symbols, the configuration parameters and the second corresponding relation of the DMRS symbol positions.
The method of any one of claims 16 to 18,

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

determining a position of the DMRS in each of the symbol groups according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, configuration parameters and a third corresponding relation of the DMRS symbol positions.
The method of any one of claims 16 to 18, wherein when the plurality of symbols includes a valid symbol and an invalid symbol,

dividing effective symbols of the plurality of symbols into at least two symbol groups;

determining a position of the DMRS in each of the symbol groups according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, the configuration parameters and the fourth corresponding relation of the DMRS symbol positions.
The method of any of claims 19 to 22, further comprising: and the network equipment sends the configuration parameters to the terminal equipment.
The method of claim 21 or 22, wherein the number of symbols in the set of symbols is the same or different.
The method of claim 21, 22 or 24, wherein the set of symbols comprises at least one of the symbols in the corresponding symbol transmitted at least twice.
The method of claim 21, 22, 24 or 25, further comprising: and the network equipment sends the signaling indicating the symbol group division method to the terminal equipment.
The method of any one of claims 16 to 26,

the DMRS comprises a preamble DMRS; or,

the DMRS includes a preamble DMRS and an additional DMRS.
The method of any one of claims 16 to 27,

the number of the symbols is K.L; wherein,

the K is the transmission frequency of the channel;

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

the K is the transmission frequency of the channel;

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

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

a first position determination module, configured to determine a position of a demodulation reference signal DMRS in the plurality of symbols.
The terminal device of claim 31, wherein,

the plurality of symbols comprises valid symbols and invalid symbols; or,

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

determining a location of the DMRS in the plurality of symbols according to a predefined rule; and/or the presence of a gas in the gas,

and determining the position of the DMRS in the plurality of symbols according to the number of the symbols contained in the plurality of symbols, the configuration parameters and the first corresponding relation of the DMRS symbol positions.
The terminal device of any of claims 31 to 33, wherein the first position determining module is configured to: when the plurality of symbols includes a valid symbol and an invalid symbol,

determining a position of the DMRS in an active symbol of the plurality of symbols according to a predefined rule; and/or the presence of a gas in the gas,

and determining the position of the DMRS in the plurality of symbols according to the number of the effective symbols contained in the plurality of symbols, the configuration parameters and the second corresponding relation of the DMRS symbol positions.
The terminal device of any 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;

determining the position of the DMRS in each symbol group according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, the configuration parameters and the third corresponding relation of the DMRS symbol positions.
The terminal device of any of claims 31 to 33, wherein the first position determining module is configured to:

when the plurality of symbols includes a valid symbol and an invalid symbol,

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

determining the position of the DMRS in each symbol group according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, the configuration parameter and the fourth corresponding relation of the DMRS symbol positions.
The terminal device of claim 36 or 37, wherein the number of symbols in the symbol group is the same or different.
The terminal device of any of claims 36 to 38, wherein the group of symbols comprises at least one of the symbols corresponding to at least two transmissions.
The terminal device of claim 36, wherein the first position determination module divides the plurality of symbols into at least two symbol groups according to a predefined manner and/or signaling indication.
The terminal device of claim 37, wherein the first position determination module divides active symbols of the plurality of symbols into at least two symbol groups according to a predefined manner and/or signaling indication.
The terminal device of any of claims 31 to 41,

the number of the symbols is K.L; wherein,

the K is the transmission frequency of the channel;

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

the K is the transmission frequency of the channel;

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

the DMRS comprises a preamble DMRS; or,

the DMRS includes a preamble DMRS and an additional DMRS.
The terminal device according to any 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, comprising:

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

a second position determination module, configured to determine a position of a demodulation reference signal (DMRS) in the plurality of symbols.
The network device of claim 46,

the plurality of symbols includes valid symbols and invalid symbols; or,

the plurality of symbols includes a valid symbol.
A network device as claimed in claim 46 or 47, wherein the valid symbols comprise symbols used for the channel transmission and the invalid symbols comprise symbols not used for the channel transmission.
The network device of any of claims 46 to 48, wherein the second location determining module is to:

determining a location of the DMRS in the plurality of symbols according to a predefined rule; and/or the presence of a gas in the atmosphere,

and determining the position of the DMRS in the plurality of symbols according to the number of the symbols contained in the plurality of symbols, the configuration parameters and the first corresponding relation of the DMRS symbol positions.
The network device of any of claims 46 to 48, wherein the second location determining module is to: when the plurality of symbols includes a valid symbol and an invalid symbol,

determining a position of the DMRS in an active symbol of the plurality of symbols according to a predefined rule; and/or the presence of a gas in the atmosphere,

and determining the position of the DMRS in the plurality of symbols according to the number of the effective symbols contained in the plurality of symbols, the configuration parameters and the second corresponding relation of the DMRS symbol positions.
The network device of any of claims 46 to 48, wherein the second location determination module is to:

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

determining a position of the DMRS in each of the symbol groups according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, configuration parameters and a third corresponding relation of the DMRS symbol positions.
The network device of any of claims 46 to 48, wherein the second location determination module is to:

when the plurality of symbols includes a valid symbol and an invalid symbol,

dividing effective symbols of the plurality of symbols into at least two symbol groups;

determining a position of the DMRS in each of the symbol groups according to a predefined rule; and/or determining the position of the DMRS in each symbol group according to the number of symbols contained in each symbol group, the configuration parameter and the fourth corresponding relation of the DMRS symbol positions.
The network device of any of claims 49-52, further comprising: and the parameter sending module is used for sending the configuration parameters to the terminal equipment.
The network device of claim 51 or 52, wherein the number of symbols in the symbol group is the same or different.
The network device of claim 51, 52 or 54, wherein the set of symbols comprises at least one of the symbols of the at least two transmissions of the corresponding symbol.
The network device of claim 51, 52, 54, or 55, further comprising: and the signaling sending module is used for sending the signaling indicating the symbol group division method to the terminal equipment.
The network device of any of claims 46 to 56,

the DMRS comprises a preamble DMRS; or,

the DMRS includes a preamble DMRS and an additional DMRS.
The network device of any of claims 46 to 57,

the number of the symbols is K.L; wherein,

the K is the transmission frequency of the channel;

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

the K is the transmission frequency of the channel;

and the L is the number of symbols corresponding to each transmission, and is carried in the time domain resource allocation information.
The network device of 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 for storing a computer program, the processor for invoking and executing the computer program stored in the memory, performing the method of any one of claims 1 to 15.
A network device, comprising: a processor and a memory, the memory for storing a computer program, the processor for invoking and executing the computer program stored in the memory, performing the method of any one of claims 16 to 30.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1 to 15.
A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 16 to 30.
A computer-readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 15.
A computer-readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 16 to 30.
A computer program product comprising computer program instructions to cause a computer to perform the method of any one of claims 1 to 15.
A computer program product comprising computer program instructions to cause a computer to perform the method of any of claims 16 to 30.
A computer program for causing a computer to perform the method of any one of claims 1 to 15.
A computer program for causing a computer to perform the method of any one of claims 16 to 30.