CN116896432A

CN116896432A - Demodulation reference signal transmission method, device, terminal and network side equipment

Info

Publication number: CN116896432A
Application number: CN202211103762.5A
Authority: CN
Inventors: 郑凯立; 刘昊; 塔玛拉卡·拉盖施; 宋扬
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-04-02
Filing date: 2022-09-09
Publication date: 2023-10-17

Abstract

The application discloses a demodulation reference signal transmission method, a device, a terminal and network side equipment, belonging to the field of mobile communication, wherein the demodulation reference signal transmission method of the embodiment of the application comprises the following steps: the first communication device receives a target demodulation reference signal from the second communication device; the first communication device performs channel estimation on the target demodulation reference signal; the target demodulation reference signal is generated according to N frequency division coverage code sequences, the N frequency division coverage code sequences take subsequences with target lengths as basic units and are generated according to resource mapping rules corresponding to the subsequences with the target lengths, the frequency division coverage code sequences are used for code division multiplexing of ports of the target demodulation reference signal, and N is a positive integer.

Description

Demodulation reference signal transmission method, device, terminal and network side equipment

Technical Field

The application belongs to the technical field of mobile communication, and particularly relates to a demodulation reference signal transmission method, a device, a terminal and network side equipment.

Background

In the existing New Radio (NR) system, a data channel demodulation reference signal (Demodulation Reference Signal, DMRS) is designed based on a length-2 frequency division orthogonal cover code (Frequency DivisionOrthogonal Cover Code, FDOCC) sequence. When the type of the DMRS is configuration type 1 (type 1), the number of the DMRS ports which are supported at most is 8; when the DMRS type is configuration type 2 (type 2), the number of DMRS ports that it supports at most is 12.

However, as the number of terminals connected in the network increases, the existing DMRS port number cannot meet the actual application requirement, and the transmitted data traffic is limited.

Disclosure of Invention

The embodiment of the application provides a demodulation reference signal transmission method, a device, a terminal and network side equipment, which can solve the problems that the existing DMRS port number cannot meet the actual application requirement and the transmitted data flow is limited.

In a first aspect, there is provided a demodulation reference signal transmission method applied to a first communication device, the method comprising:

the first communication device receives a target demodulation reference signal from the second communication device;

the first communication device performs channel estimation on the target demodulation reference signal;

the target demodulation reference signal is generated according to N frequency division coverage code sequences, the N frequency division coverage code sequences take subsequences with target lengths as basic units and are generated according to resource mapping rules corresponding to the subsequences with the target lengths, the frequency division coverage code sequences are used for code division multiplexing of ports of the target demodulation reference signal, and N is a positive integer.

In a second aspect, there is provided a demodulation reference signal transmission apparatus, including:

A transceiver module for receiving a target demodulation reference signal from the second communication device;

a calculation module, configured to perform channel estimation on the target demodulation reference signal;

In a third aspect, a demodulation reference signal transmission method is provided, applied to a second communication device, and the method includes:

the second communication equipment takes a subsequence with a target length as a basic unit, and generates N frequency division coverage code sequences according to a resource mapping rule corresponding to the subsequence with the target length, wherein the frequency division coverage code sequences are used for code division multiplexing of a port of a demodulation reference signal of a target demodulation reference signal;

the second communication device generates and transmits a target demodulation reference signal to the first communication device according to the N frequency division coverage code sequences;

wherein N is a positive integer.

In a fourth aspect, there is provided a demodulation reference signal transmission apparatus, including:

the generating module is used for generating N frequency division coverage code sequences by taking the subsequence of the target length as a basic unit and using a resource mapping rule corresponding to the subsequence of the target length, wherein the frequency division coverage code sequences are used for code division multiplexing of a port of a demodulation reference signal of the target demodulation reference signal;

a transmission module, configured to generate and send a target demodulation reference signal to a first communication device according to the N frequency division coverage code sequences;

wherein N is a positive integer.

In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to perform channel estimation on the target demodulation reference signal, and the communication interface is configured to receive the target demodulation reference signal from a second communication device.

In a seventh aspect, a network side device is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which program or instructions when executed by the processor implement the steps of the method as described in the first aspect.

In an eighth aspect, a network side device is provided, including a processor and a communication interface, where the processor is configured to generate N frequency division coverage code sequences with a sub-sequence of a target length as a basic unit and with a resource mapping rule corresponding to the sub-sequence of the target length, where the frequency division coverage code sequences are used for code division multiplexing of ports of demodulation reference signals of a target demodulation reference signal, and the communication interface is configured to generate and send the target demodulation reference signal to a first communication device according to the N frequency division coverage code sequences.

In a ninth aspect, there is provided a demodulation reference signal transmission system, including: a terminal and a network side device, the terminal being operable to perform the steps of the demodulation reference signal transmission method as described in the first aspect, the network side device being operable to perform the steps of the demodulation reference signal transmission method as described in the third aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect, or performs the steps of the method according to the third aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions to implement the method according to the first aspect or to implement the method according to the third aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the steps of the demodulation reference signal transmission method as described in the first aspect or to implement the steps of the demodulation reference signal transmission method as described in the third aspect.

In the embodiment of the application, N frequency division coverage code sequences are generated by taking the subsequence based on the target length as a basic unit and using the resource mapping rule corresponding to the subsequence with the target length, and the target demodulation reference signals are generated and sent according to the N frequency division coverage code sequences and used for carrying out channel estimation, so that the target DMRS can support more ports and the transmitted data flow is improved.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applicable;

Fig. 2 is a schematic flow chart of a demodulation reference signal transmission method according to an embodiment of the present application;

fig. 3 is a schematic diagram of a demodulation reference signal according to an embodiment of the present application;

fig. 4 is another schematic diagram of a demodulation reference signal according to an embodiment of the present application;

fig. 5 is another schematic diagram of a demodulation reference signal according to an embodiment of the present application;

fig. 6 is a schematic diagram of a resource pattern for despreading a demodulation reference signal according to an embodiment of the present application;

fig. 7 is a schematic diagram of another resource pattern for despreading a demodulation reference signal according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a demodulation reference signal transmission device according to an embodiment of the present application;

fig. 9 is another flow chart of a demodulation reference signal transmission method according to an embodiment of the present application;

fig. 10 is a schematic diagram of another structure of a demodulation reference signal transmission apparatus according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of a terminal implementing an embodiment of the present application;

fig. 13 is a schematic structural diagram of a network side device for implementing an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multip) le Access, OFDMA), single-Carrier frequency division multiple Access (SC-carrier FrequencyDivision Multiple Access), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a new air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmitting/receiving point (TransmittingReceivingPoint, TRP), or some other suitable terminology in the art, a WLAN access point, a WiFi node, etc., and is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited. The core network device may include, but is not limited to, at least one of: a core network node, a core network function, a mobility management entity (Mobility Management Entity, MME), an access mobility management function (Access and Mobility Management Function, AMF), a session management function (Session Management Function, SMF), a user plane function (User Plane Function, UPF), a policy control function (Policy Control Function, PCF), a policy and charging rules function (Policy and Charging Rules Function, PCRF), an edge application service discovery function (EdgeApplicationServerDiscoveryFunction, EASDF), unified data management (Unified Data Management, UDM), unified data repository (Unified Data Repository, UDR), a home subscriber server (Home Subscriber Server, HSS), a centralized network configuration (Centralized network configuration, CNC), a network storage function (Network Repository Function, NRF), a network opening function (NetworkExposureFunction, NEF), a local NEF (LocalNEF, or L-NEF), a binding support function (Binding Support Function, BSF), an application function (Application Function, AF), and the like. It should be noted that, in the embodiment of the present application, only the core network device in the NR system is described as an example, and the specific type of the core network device is not limited.

The method, the device, the terminal and the network side equipment for transmitting the demodulation reference signal provided by the embodiment of the application are described in detail through some embodiments and application scenes thereof by combining the attached drawings.

As shown in fig. 2, an embodiment of the present application provides a demodulation reference signal transmission method, where an execution body of the method is a first communication device, and the first communication device may be a network side device or a terminal, in other words, the method may be executed by software or hardware installed in the first communication device. The method comprises the following steps.

S210, the first communication device receives the target demodulation reference signal from the second communication device.

The target demodulation reference signal is generated according to N frequency division coverage code sequences, the N frequency division coverage code sequences take a subsequence of a target length as a basic unit and are generated according to a resource mapping rule corresponding to the subsequence of the target length, the frequency division coverage code sequences are used for code division multiplexing (Code Division Multiplexing, CDM) of a port of the target demodulation reference signal, and the N is a positive integer.

It should be understood that the second communication device may be a network side device or a terminal.

The second communication device is preconfigured with sub-sequences with various lengths, and the sub-sequences with various lengths can be designed according to actual needs, for example, the sub-sequences with the lengths of 2, 4, 6 and the like respectively.

The second communication device determines a subsequence of a target length from the subsequences of multiple lengths, and then generates N frequency division coverage code sequences according to a resource mapping rule corresponding to the subsequence of the target length, where each frequency division coverage code sequence may respectively correspond to 1 or 2 ports (ports) of M ports belonging to the same code division multiplexing group (CDM group) in the target DMRS.

The target DMRS may be divided into a first configuration type and a second configuration type, wherein the first configuration type is associated with DMRS configuration type 1 and the second configuration type is associated with DMRS configuration type 2.

S220, the first communication device carries out channel estimation on the target demodulation reference signal.

After receiving the target DMRS, the first communication device may perform channel estimation on the target DMRS based on a preset despreading rule.

If the DMRS are generated based on only the length-2 frequency-division orthogonal cover code, each CDM may only include at most two DMRS ports orthogonal to each other, and by generating the DMRS based on the frequency-division cover code generated by taking the target-length subsequence as a basic unit, more DMRS ports orthogonal to each other may be included in each CDM group, so that the total number of DMRS ports supported by the system increases.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, N frequency division coverage code sequences are generated by using a resource mapping rule corresponding to a target-length subsequence based on the target-length subsequence as a basic unit, and a target demodulation reference signal is generated and sent according to the N frequency division coverage code sequences, so as to perform channel estimation, thereby enabling a target DMRS to support more ports and improving the data traffic of transmission.

Based on the above embodiment, further, the subsequence of the target length is one of the following:

a subsequence of a first length;

a subsequence of a second length;

a subsequence of a third length;

wherein the first length is 2, the second length is 4, and the third length is 6.

The embodiments of the present application are exemplified by the case of configuring the subsequences with the above three lengths.

In one embodiment, the subsequence of the first length is at least one of:

a first subsequence [ +1, +1];

a second subsequence [ +1, -1];

a third subsequence [ -1, -1];

the fourth subsequence [ -1, +1].

Wherein the third sub-sequence may be generated by multiplying the first sub-sequence by-1 and the fourth sub-sequence may be generated by multiplying the second sub-sequence by-1.

In one embodiment, the subsequence of the second length is at least one of:

a fifth subsequence [ +1, +1];

a sixth subsequence [ +1, -1, +1, -1];

a seventh subsequence [ +1, -1, -1];

the eighth subsequence [ +1, -1, -1, +1].

In one embodiment, the subsequence of the third length is at least one of:

a ninth subsequence [ +1, +1];

a tenth subsequence [ +1, -1, +1, -1];

an eleventh subsequence [ +1, -1, -1, +1];

the twelfth subsequence [ +1, -1, -1, +1, -1].

In one embodiment, based on the above-described sub-sequences of different lengths, the frequency division cover code sequence is generated by one of:

mapping the subsequence of the first length to 2 subcarriers on a symbol occupied by the port in a first mapping rule form by taking the subsequence of the first length as a basic unit, wherein the 2 subcarriers belong to the same RB;

mapping the sub-sequence of the second length to 4 sub-carriers on the symbol occupied by the port in a second mapping rule form by taking the sub-sequence of the second length as a basic unit, wherein the 4 sub-carriers belong to the same RB or two RBs;

and generating a sub-sequence with a third length as a basic unit, and mapping the sub-sequence with the third length on 6 sub-carriers on a symbol occupied by the port in a form of a third mapping rule, wherein the 6 sub-carriers belong to the same RB.

In the case that the subsequence of the first length, that is, the subsequence of length 2 is the target-length subsequence, the corresponding first mapping rule is specifically as follows:

in one embodiment, in the case of generating the frequency division coverage code sequence in the first sub-sequence as a basic unit, the first mapping rule is to sequentially map the first sub-sequence to subcarriers on symbols occupied by ports.

In another embodiment, in the case of generating the frequency division coverage code sequence with the second sub-sequence as a basic unit, the first mapping rule is to sequentially map the second sub-sequence to the sub-carriers on the symbol occupied by the port.

In one embodiment, in the case of generating the frequency division coverage code sequence with the first sub-sequence and the third sub-sequence as basic units, the first mapping rule is to map the first sub-sequence and the third sub-sequence alternately to the sub-carriers on the symbol occupied by the port.

In another embodiment, in the case of generating the frequency division coverage code sequence with the second sub-sequence and the fourth sub-sequence as basic units, the first mapping rule is to map the second sub-sequence and the fourth sub-sequence alternately to the sub-carriers on the symbol occupied by the port.

It should be understood that the symbols occupied by the ports may be orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplex, OFDM) symbols, or may be other symbols, which are not specifically limited herein.

As shown in fig. 3 and 4, a DMRS pattern, which is a first configuration type single symbol structure, includes 2 CDM groups: CDM group 0 and CDM group 1 correspond to resource units of different patterns, respectively, wherein CDM group 0 corresponding to resource units of a diagonal image corresponds to port 0 and port 1, CDM group 1 corresponding to resource units of a blank image corresponds to port 2 and port 3, CDM group 0 corresponding to resource units of a horizontal image corresponds to port 8 and port 9, and CDM group 1 corresponding to resources of a dot image corresponds to port 10 and port 11.

Taking CDM group 0 as an example, shown in fig. 3, port 0 mapped to DMRS is mapped to port 1 by using the first subsequence [ +1, +1] as a basic unit, port 1 is mapped to port 8 by using the second subsequence [ +1, +1] and the third subsequence [ -1, -1] as basic units, and port 9 is mapped to port 9 by using the second subsequence [ +1, -1] and the fourth subsequence [ -1, +1] as basic units. Wherein, on port 0, the first sub-sequence [ +1, +1] maps to every 2 adjacent sub-carriers occupied by port 0; on port 1, a second sub-sequence [ +1, -1] maps to every 2 adjacent sub-carriers that port 1 occupies; on port 8, the first sub-sequence [ +1, +1] and the third sub-sequence [ -1, -1] are alternately mapped to every 2 adjacent sub-carriers occupied by port 8 in the form of a first mapping rule; on port 9, the second sub-sequence [ +1, -1] and the fourth sub-sequence [ -1, +1] are alternately mapped to every 2 adjacent sub-carriers occupied by port 9 in the form of the first mapping rule. Fig. 3 is an example of 2 RBs, which can be applied to any number of RBs.

In an embodiment, in the case of taking the sub-sequence of the second length, that is, the sub-sequence of length 4 as the sub-sequence of the target length, the corresponding second mapping rule may be that the sub-carriers mapped on the symbols occupied by the ports sequentially with the fifth sub-sequence, the sixth sub-sequence, the seventh sub-sequence or the eighth sub-sequence as the basic unit.

As shown in fig. 3, for example, CDM group 0 is used as a base unit for mapping to port 0 of DMRS in the fifth subsequence [ +1, +1] and mapping to port 1 in the sixth subsequence [ +1, -1, +1, -1] and mapping to port 8 in the seventh subsequence [ +1, -1, -1] and mapping to port 9 in the eighth subsequence [ +1, -1, -1, +1] and mapping to port 1 in the sixth subsequence [ +1, -1] and mapping to port 1 in the fifth subsequence. Wherein, the 4 sub-sequences with the second length are mapped to sub-carriers 0, 2, 4 and 6 of the RB0 in the form of a second mapping rule; subcarriers 8 and 10 mapped to RB0 and subcarriers 12 and 14 mapped to RB1 are RE resources occupied by the DMRS in a cross-RB mode; subcarriers 16, 18, 20, 22 mapped to RB 1. Fig. 3 is an example of 2 RBs, which can be applied to any number of RBs.

It should be understood that when the number of RBs is odd, for example, when the BandWidth occupied by a partial BandWidth (BWP) is odd number of RBs or the BandWidth occupied by a DMRS is odd number of RBs, a first sub-sequence [ +1, +1] and a second sub-sequence [ +1, -1] are mapped on 2 largest adjacent sub-carriers of the index corresponding to the same CDM group in the largest index RB, wherein the first sub-sequence [ +1, +1] is equivalent to the first two elements of the fifth sub-sequence [ +1, +1] and the seventh sub-sequence [ +1, -1, -1 ]. The second subsequence [ +1, -1] is equivalent to the first two elements of the sixth subsequence [ +1, -1, +1, -1] and the eighth subsequence [ +1, -1, -1, +1 ].

In an embodiment, in the case of taking the subsequence of the third length, that is, the subsequence of the length 6, as the subsequence of the target length, the corresponding second mapping rule may be that the subcarriers on the symbol occupied by the port are sequentially mapped with the fifth subsequence, the sixth subsequence, the seventh subsequence, or the eighth subsequence as a basic unit.

As shown in fig. 4, taking CDM group 0 as an example, port 0 mapped to DMRS with the basic unit of the ninth subsequence [ +1, +1] and port 1 with the basic unit of the tenth subsequence [ +1, -1, +1, -1], port 8 is mapped with the eleventh subsequence [ +1, -1, -1, +1] as a base unit and port 9 is mapped with the twelfth subsequence [ +1, -1, -1, +1, -1] as a base unit. The above 4 sub-sequences with the length of 6 are mapped on 6 sub-carriers of RB0 and RB1 in the form of a third mapping rule, that is, sub-carriers 0, 2, 4, 6, 8, 10 and sub-carriers 12, 14, 16, 18, 20 and 22 of RB 0. Fig. 3 is an example of 2 RBs, which can be applied to any number of RBs.

As shown in fig. 5, a DMRS pattern of a second configuration type single symbol structure includes 3 CDM groups: CDM group 0, CDM group 1 and CDM group 2 correspond to resource units of different patterns, respectively, wherein CDM group 0 corresponding to resource units of a diagonal image corresponds to port 0 and port 1, CDM group 1 corresponding to resource units of a blank image corresponds to port 2 and port 3, CDM group 2 corresponding to resource units of a vertical image corresponds to port 4 and port 5, CDM group 0 corresponding to resource units of a horizontal image corresponds to port 12 and port 13, CDM group 1 corresponding to resources of a cross image corresponds to port 14 and port 15, and CDM group 2 corresponding to resources of a dot image corresponds to port 16 and port 17.

In one embodiment, taking CDM group 0 as shown in fig. 5 as an example, port 0 mapped to DMRS by taking the first subsequence [ +1, +1] as a basic unit, port 1 by taking the second subsequence [ +1, -1] as a basic unit, port 12 by taking the first subsequence [ +1, +1] and the third subsequence [ -1, -1] as a basic unit, and port 13 by taking the second subsequence [ +1, -1] and the fourth subsequence [ -1, +1] as a basic unit. Wherein, on port 0, the first sub-sequence [ +1, +1] maps to every 2 adjacent sub-carriers occupied by port 0; on port 1, a second sub-sequence [ +1, -1] maps to every 2 adjacent sub-carriers that port 1 occupies; on port 12, the first sub-sequence [ +1, +1] and the third sub-sequence [ -1, -1] are alternately mapped to every 2 adjacent sub-carriers occupied by port 12 in the form of a first mapping rule; on port 13, the second sub-sequence [ +1, -1] and the fourth sub-sequence [ -1, +1] are alternately mapped to every 2 adjacent sub-carriers occupied by port 13 in the form of the first mapping rule. Fig. 5 is an example of 1 RB, which is applicable to any number of RBs.

In one embodiment, taking CDM group 0 as an example, port 0 mapped to DMRS in the base unit of the fifth subsequence [ +1, +1] is mapped to port 1 in the base unit of the sixth subsequence [ +1, -1, +1, -1] is mapped to port 12 in the base unit of the seventh subsequence [ +1, -1, -1] and the base unit of the eighth subsequence [ +1, -1, +1] is mapped to port 13. In CDM group 0, the 4 sub-sequences of the second length are mapped to 4 adjacent sub-carriers, namely sub-carriers 0, 1, 6 and 7 of RB0 in the form of a second mapping rule; fig. 5 is an example of 1 RB, which is applicable to any number of RBs.

In one embodiment, the frequency division overlay code sequence is generated with a starting subcarrier of a common resource block (Common Resource Block, CRB) with sequence number 0 as a starting position.

The starting subcarrier is related to a CDM group, and in one embodiment, when the target DMRS is of a first configuration type, a frequency division coverage code sequence corresponding to CDM group 0 is generated with the 1 st subcarrier of a common resource block with a sequence number of 0 as a starting position; the frequency division cover code sequence corresponding to CDM group 1 is generated with the 2 nd subcarrier of the common resource block with sequence number 0 as the starting position.

In another embodiment, when the target DMRS is of the second configuration type, a frequency division coverage code sequence corresponding to CDM group 0 is generated with the 1 st subcarrier of the common resource block with sequence number 0 as a starting position; the 3 rd sub-carrier of the public resource block with the sequence number of 0 is used as a starting position to generate a frequency division coverage code sequence corresponding to CDM group 1; the frequency division cover code sequence corresponding to CDM group 2 is generated with the 5 th subcarrier of the common resource block with sequence number 0 as a starting position.

In one embodiment, in the case of generating the frequency division coverage code sequence with a sub-sequence of a first length or a sub-sequence of a second length as a basic unit, the target demodulation reference signal is a demodulation reference signal of a first configuration type or a second configuration type; wherein the first configuration type is related to a demodulation reference signal configuration type 1, and the second configuration type is related to a demodulation reference signal configuration type 2.

In another embodiment, in the case that the frequency division cover code sequence is generated in a sub-sequence of a third length as a basic unit, the target demodulation reference signal is of a first configuration type; wherein the first configuration type is related to demodulation reference signal configuration type 1.

Based on the subsequences with lengths of 2, 4 and 6 provided by the embodiment of the application, for the single-symbol DMRS, 8 ports can be supported at most for the first configuration type, and 12 ports can be supported at most for the second configuration type; for a dual symbol DMRS, a maximum of 16 ports may be supported for a first configuration type and a maximum of 24 ports may be supported for a second configuration type. The number of ports supported by the existing DMRS is doubled.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, a sub-sequence with multiple lengths is designed, and mapped to a port by using a sub-sequence with a target length as a basic unit to generate a frequency-division coverage code sequence, so as to generate a target DMRS, thereby enabling the target DMRS to support more ports and improving the data traffic of transmission.

Based on the foregoing embodiment, further, in a case where the first communication device is a terminal and the second communication device is a network side device, the method further includes:

The terminal receives despreading instruction information from the network side equipment, wherein the despreading instruction information is used for instructing the terminal to perform corresponding despreading window information when channel estimation of the target demodulation reference signal is performed, and the despreading window information comprises despreading window length.

The length of the despreading window may be varied, and in the embodiment of the present application, only the despreading window length of 2 or 4 is exemplified.

In one embodiment, the step S220 includes:

and the terminal carries out channel estimation on the target demodulation reference signal based on the despreading window length.

In one embodiment, when the despreading window length is 2, for ports belonging to the same code division multiplexing group in the target demodulation reference signal, the terminal performs joint channel estimation by using adjacent 2 subcarriers occupied by the ports on a symbol as despreading windows.

In another embodiment, when the despreading window length is 4, for ports belonging to the same code division multiplexing group in the target demodulation reference signal, the terminal performs joint channel estimation by using adjacent 4 subcarriers occupied by the ports on a symbol as despreading windows.

As shown in fig. 6, a DMRS pattern of a single symbol structure of the first configuration type, and when the despreading window length is 4, the DMRS channel estimation manner of the terminal is shown in fig. 6. Taking the channel estimation on CDM group 0 as an example, the joint channel estimation is performed once based on the adjacent 4 subcarriers in the despreading window 1, and the joint channel estimation is performed once based on the adjacent 4 subcarriers in the despreading window 2, that is, the channel estimation is performed based on two despreading windows within one RB.

As shown in fig. 7, a DMRS pattern of a second configuration type single symbol structure, when the despreading window length is 4, the DMRS channel estimation manner of the terminal device is shown in fig. 6. Taking the channel estimation on CDM group 0 as an example, joint channel estimation is performed once based on adjacent 4 subcarriers corresponding to CDM group 0 in despreading window 1.

Since the frequency division coverage codes within the despreading window are orthogonal to each other, 4 DMRS ports belonging to the same CDM group are orthogonal to each other to ensure channel estimation performance.

It can be seen that, by using the frequency division cover code generated by taking the sub-sequence of the target length as a basic unit, code division multiplexing can be achieved between more DMRS ports, so that one CDM group includes more DMRS ports orthogonal to each other.

In one embodiment, before the terminal receives the despreading instruction information from the network side device, the method further includes:

and the terminal reports the channel estimation capability of the terminal to the network side equipment.

In one embodiment, the channel estimation capability is used to indicate whether the terminal supports demodulation reference signal channel estimation based on a despreading window length of 4.

According to the technical scheme of the embodiment, the method and the device enable the terminal to perform channel estimation on the DMRS according to the length of the despreading window by sending despreading indication information to the terminal, so that the channel estimation of the target DMRS is more accurate.

In one embodiment, in a case where the first communication device is a terminal and the second communication device is a network side device, before the terminal receives the target demodulation reference signal from the network side device, the method further includes:

the terminal reports the downlink data receiving capability supported by the terminal to the network side equipment, wherein the downlink data receiving capability comprises the capability of the RB number type of the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) supported by the terminal.

In one embodiment, the RB number type of the PDSCH includes one of:

the RB number of the PDSCH is even;

the number of RBs of the PDSCH is odd or even, i.e., there is no limitation on parity of the number of RBs of the PDSCH.

In an embodiment, the terminal receives target configuration information from the network side device, where the target configuration information corresponds to downlink data receiving capability reported by the terminal, and the target configuration information is used to indicate the RB number type of the PDSCH received by the terminal.

For example, when the number of RBs of the PDSCH that the terminal only supports is reported to be even by the terminal, the network side device may send the target configuration information to indicate that the number of RBs of the PDSCH that the terminal subsequently transmits will be even, and at this time, the terminal may use a corresponding channel estimation method to demodulate the PDSCH. Or when the number of RBs of PDSCH supported by the terminal reported by the terminal may be odd or even, the network side device may send target configuration information to indicate that the number of RBs of PDSCH subsequently transmitted by the terminal will be even or not limited (i.e. the number of RBs may be even or odd), where the terminal may perform demodulation of the PDSCH by adopting a corresponding channel estimation method according to the target configuration information.

When the RB number of the PDSCH is odd, the terminal may perform channel estimation based on two despreading windows within one RB, thereby solving the channel estimation problem when the RB number of the PDSCH is odd. That is, if the terminal supports channel estimation based on two despreading windows within one RB, the number of RBs that the terminal can support PDSCH that it receives is odd. It should be noted that, channel estimation based on two despreading windows in one RB is only one method for a terminal to perform channel estimation, and other channel estimation methods that can enable the terminal to support reception of PDSCH with odd number of RBs are not excluded.

According to the technical scheme of the embodiment, the embodiment of the application determines the RB number type of the PDSCH through the downlink data receiving capability reported by the terminal, so that the performance of channel estimation is improved.

According to the demodulation reference signal transmission method provided by the embodiment of the application, the execution main body can be a demodulation reference signal transmission device. In the embodiment of the present application, the demodulation reference signal transmission device provided in the embodiment of the present application is described by taking a method for performing demodulation reference signal transmission by the demodulation reference signal transmission device as an example.

As shown in fig. 8, the demodulation reference signal transmission apparatus includes: a transceiver module 701 and a computation module 702.

The transceiver module 701 is configured to receive a target demodulation reference signal from a second communication device; the calculating module 702 is configured to perform channel estimation on the target demodulation reference signal; the target demodulation reference signal is generated according to N frequency division coverage code sequences, the N frequency division coverage code sequences take subsequences with target lengths as basic units and are generated according to resource mapping rules corresponding to the subsequences with the target lengths, the frequency division coverage code sequences are used for code division multiplexing of ports of the target demodulation reference signal, and N is a positive integer.

a subsequence of a first length;

a subsequence of a second length;

A subsequence of a third length;

Further, the frequency division cover code sequence is generated by one of:

Further, the subsequence of the first length is at least one of:

a first subsequence [ +1, +1];

a second subsequence [ +1, -1];

a third subsequence [ -1, -1];

the fourth subsequence [ -1, +1].

Further, the subsequence of the second length is at least one of:

A fifth subsequence [ +1, +1];

a sixth subsequence [ +1, -1, +1, -1];

a seventh subsequence [ +1, -1, -1];

the eighth subsequence [ +1, -1, -1, +1].

Further, the subsequence of the third length is at least one of:

a ninth subsequence [ +1, +1];

a tenth subsequence [ +1, -1, +1, -1];

an eleventh subsequence [ +1, -1, -1, +1];

the twelfth subsequence [ +1, -1, -1, +1, -1].

Further, in the case that the frequency division coverage code sequence is generated by taking the first sub-sequence and the third sub-sequence as basic units, the first mapping rule is that the first sub-sequence and the third sub-sequence are mapped alternately to subcarriers on symbols occupied by ports.

Further, in the case that the frequency division coverage code sequence is generated by taking the second sub-sequence and the fourth sub-sequence as basic units, the first mapping rule is that the second sub-sequence and the fourth sub-sequence are mapped alternately to subcarriers on symbols occupied by ports.

Further, the frequency division coverage code sequence is generated by taking a starting subcarrier of a common resource block with the sequence number of 0 as a starting position.

Further, in the case that the frequency division coverage code sequence is generated with a sub-sequence of a first length or a sub-sequence of a second length as a basic unit, the target demodulation reference signal is a demodulation reference signal of a first configuration type or a second configuration type; wherein the first configuration type is related to a demodulation reference signal configuration type 1, and the second configuration type is related to a demodulation reference signal configuration type 2.

Further, in the case that the frequency division cover code sequence is generated with a sub-sequence of a third length as a basic unit, the target demodulation reference signal is of a first configuration type; wherein the first configuration type is related to demodulation reference signal configuration type 1.

Based on the above embodiment, further, in the case that the first communication device is a terminal and the second communication device is a network side device, the transceiver module 701 is further configured to:

and receiving despreading indication information from the network side equipment, wherein the despreading indication information is used for indicating despreading window information corresponding to the terminal when channel estimation of the target demodulation reference signal is performed, and the despreading window information comprises despreading window length.

Further, the calculating module 702 is configured to perform channel estimation on the target demodulation reference signal based on the despreading window length.

Further, the despreading window length is 2 or 4.

Further, the computing module 702 is configured to perform at least one of:

under the condition that the length of the despreading window is 2, aiming at ports belonging to the same code division multiplexing group in the target demodulation reference signal, carrying out joint channel estimation by taking 2 adjacent subcarriers occupied by the ports on a symbol as despreading windows;

and under the condition that the length of the despreading window is 4, aiming at ports belonging to the same code division multiplexing group in the target demodulation reference signal, carrying out joint channel estimation by taking adjacent 4 subcarriers occupied by the ports on a symbol as despreading windows.

Further, before receiving the despreading instruction information from the network side device, the transceiver module 701 is further configured to report the channel estimation capability of the terminal to the network side device.

Further, the channel estimation capability is used to indicate whether the terminal supports demodulation reference signal channel estimation based on a despreading window length of 4.

Based on the above embodiment, further, in the case where the first communication device is a terminal and the second communication device is a network side device, before receiving the target demodulation reference signal from the network side device, the transceiver module 701 is further configured to report, to the network side device, a downlink data receiving capability supported by the terminal, where the downlink data receiving capability includes an RB number type capability of PDSCH supported by the terminal.

Further, the RB number type of the PDSCH includes one of:

the RB number of the PDSCH is even;

the number of RBs of the PDSCH is odd or even.

Further, the transceiver module 701 is further configured to receive target configuration information from the network side device, where the target configuration information corresponds to downlink data receiving capability reported by the terminal, and the target configuration information is used to indicate the RB number type of the PDSCH received by the terminal.

The demodulation reference signal transmission device in the embodiment of the application can be an electronic device, for example, an electronic device with an operating system, or can be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The demodulation reference signal transmission device provided by the embodiment of the application can realize each process realized by the method embodiments of fig. 2 to 7 and achieve the same technical effects, and in order to avoid repetition, the description is omitted here.

As shown in fig. 9, an embodiment of the present application provides a demodulation reference signal transmission method, where an execution body of the method is a second communication device, and the second communication device may be a network side device or a terminal, in other words, the method may be executed by software or hardware installed in the second communication device. The method comprises the following steps.

S810, the second communication equipment takes a subsequence with a target length as a basic unit, and generates N frequency division coverage code sequences according to a resource mapping rule corresponding to the subsequence with the target length, wherein the frequency division coverage code sequences are used for code division multiplexing of a port of a demodulation reference signal of a target demodulation reference signal;

s820, the second communication device generates and sends a target demodulation reference signal to the first communication device according to the N frequency division coverage code sequences;

wherein N is a positive integer.

Steps S810-S820 may implement the method embodiment shown in fig. 2, and obtain the same technical effects, and the repetition of which is not repeated here.

a subsequence of a first length;

a subsequence of a second length;

a subsequence of a third length;

Further, step S810 includes one of the following ways:

Further, the subsequence of the first length is at least one of:

a first subsequence [ +1, +1];

a second subsequence [ +1, -1];

a third subsequence [ -1, -1];

the fourth subsequence [ -1, +1].

Further, the subsequence of the second length is at least one of:

a fifth subsequence [ +1, +1];

a sixth subsequence [ +1, -1, +1, -1];

a seventh subsequence [ +1, -1, -1];

the eighth subsequence [ +1, -1, -1, +1].

Further, the subsequence of the third length is at least one of:

a ninth subsequence [ +1, +1];

a tenth subsequence [ +1, -1, +1, -1];

an eleventh subsequence [ +1, -1, -1, +1];

the twelfth subsequence [ +1, -1, -1, +1, -1].

Further, in the case of generating the frequency division coverage code sequence with the first sub-sequence and the third sub-sequence as basic units, the first mapping rule is to map the first sub-sequence and the third sub-sequence alternately to the sub-carriers on the symbol occupied by the port.

Further, in the case of generating the frequency division coverage code sequence with the second sub-sequence and the fourth sub-sequence as basic units, the first mapping rule is to map the second sub-sequence and the fourth sub-sequence alternately to the sub-carriers on the symbol occupied by the port.

Further, in the case that the frequency division cover code sequence is generated with a sub-sequence of a third length as a basic unit, the demodulation reference signal is of a first configuration type; wherein the first configuration type is related to demodulation reference signal configuration type 1.

the network side equipment sends despreading indication information to the terminal, wherein the despreading indication information is used for indicating despreading window information corresponding to the terminal when channel estimation of the target demodulation reference signal is carried out, and the despreading window information comprises despreading window length.

Further, the despreading window length is 2 or 4.

Further, before the network side device sends the despreading instruction information to the terminal, the method further includes:

the network side equipment receives the channel estimation capability of the terminal from the terminal.

Based on the above embodiment, further, in a case where the first communication device is a terminal and the second communication device is a network side device, before the network side device sends the target demodulation reference signal to the terminal, the method further includes:

The network side equipment receives downlink data receiving capability supported by the terminal from the terminal, wherein the downlink data receiving capability comprises the capability of the RB number type of the PDSCH supported by the terminal.

Further, the RB number type of the PDSCH includes one of:

the RB number of the PDSCH is even;

the number of RBs of the PDSCH is odd or even.

Further, the network side device sends target configuration information to the terminal, where the target configuration information corresponds to downlink data receiving capability supported by the terminal and received by the network side device from the terminal, and the target configuration information is used to indicate RB number types of PDSCH received by the terminal.

As shown in fig. 10, the demodulation reference signal transmission apparatus includes: generating module 901 and transmitting module 902

The generating module 901 is configured to generate N frequency division coverage code sequences with a subsequence of a target length as a basic unit and with a resource mapping rule corresponding to the subsequence of the target length, where the frequency division coverage code sequences are used for code division multiplexing of a port of a demodulation reference signal of a target demodulation reference signal; the transmitting module 902 is configured to generate and send a target demodulation reference signal to a first communication device according to the N frequency division coverage code sequences; wherein N is a positive integer.

a subsequence of a first length;

a subsequence of a second length;

a subsequence of a third length;

Further, the generating module 901 is configured to perform one of the following manners:

Further, the subsequence of the first length is at least one of:

a first subsequence [ +1, +1];

a second subsequence [ +1, -1];

a third subsequence [ -1, -1];

the fourth subsequence [ -1, +1].

Further, the subsequence of the second length is at least one of:

a fifth subsequence [ +1, +1];

a sixth subsequence [ +1, -1, +1, -1];

a seventh subsequence [ +1, -1, -1];

the eighth subsequence [ +1, -1, -1, +1].

Further, the subsequence of the third length is at least one of:

a ninth subsequence [ +1, +1];

a tenth subsequence [ +1, -1, +1, -1];

an eleventh subsequence [ +1, -1, -1, +1];

the twelfth subsequence [ +1, -1, -1, +1, -1].

Based on the foregoing embodiment, further, in the case where the first communication device is a terminal and the second communication device is a network side device, the transmission module 902 is further configured to send despreading instruction information to the terminal, where the despreading instruction information is used to instruct the terminal to perform despreading window information corresponding to channel estimation of the target demodulation reference signal, and the despreading window information includes a despreading window length.

Further, the despreading window length is 2 or 4.

Further, the transmitting module 902 is further configured to receive a channel estimation capability of the terminal from the terminal.

Based on the above embodiment, further, in the case where the first communication device is a terminal and the second communication device is a network side device, the transmission module 902 is further configured to receive, from the terminal, a downlink data reception capability supported by the terminal, where the downlink data reception capability includes an RB number type capability of a physical downlink shared channel PDSCH supported by the terminal.

Further, the RB number type of the PDSCH includes one of:

the RB number of the PDSCH is even;

the number of RBs of the PDSCH is odd or even.

Further, the transmission module 902 is further configured to send target configuration information to the terminal, where the target configuration information corresponds to downlink data receiving capability supported by the terminal and received by the network side device from the terminal, and the target configuration information is used to indicate the RB number type of the PDSCH received by the terminal.

The demodulation reference signal transmission device provided by the embodiment of the application can realize each process realized by the method embodiment of fig. 9 and achieve the same technical effect, and in order to avoid repetition, the description is omitted here.

Optionally, as shown in fig. 11, the embodiment of the present application further provides a communication device 1000, including a processor 1001 and a memory 1002, where the memory 1002 stores a program or an instruction that can be executed on the processor 1001, for example, when the communication device 1000 is a terminal, the program or the instruction is executed by the processor 1001 to implement the steps of the above-mentioned demodulation reference signal transmission method embodiment, and the same technical effects can be achieved. When the communication device 1000 is a network side device, the program or the instruction, when executed by the processor 1001, implements the steps of the above embodiment of the demodulation reference signal transmission method, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the processor is used for carrying out channel estimation on the target demodulation reference signal, and the communication interface is used for receiving the target demodulation reference signal from the second communication equipment. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 12 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 1100 includes, but is not limited to: at least part of the components of the radio frequency unit 1101, the network module 1102, the audio output unit 1103, the input unit 1104, the sensor 1105, the display unit 1106, the user input unit 1107, the interface unit 1108, the memory 1109, and the processor 1110, etc.

Those skilled in the art will appreciate that the terminal 1100 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 1110 by a power management system so as to perform functions such as managing charging, discharging, and power consumption by the power management system. The terminal structure shown in fig. 12 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 1104 may include a graphics processing unit (Graphics Processing Unit, GPU) 11041 and a microphone 11042, the graphics processor 11041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1107 includes at least one of a touch panel 11071 and other input devices 11072. The touch panel 11071 is also referred to as a touch screen. The touch panel 11071 may include two parts, a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 1101 may transmit the downlink data to the processor 1110 for processing; in addition, the radio frequency unit 1101 may send uplink data to the network side device. Typically, the radio frequency unit 1101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

Memory 1109 may be used to store software programs or instructions and various data. The memory 1109 may mainly include a first memory area storing programs or instructions and a second memory area storing data, wherein the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 1109 may include volatile memory or nonvolatile memory, or the memory 1109 may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 1109 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 1110 may include one or more processing units; optionally, the processor 1110 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1110.

Wherein the radio frequency unit 1101 is configured to receive a target demodulation reference signal from the second communication device;

a processor 1110, configured to perform channel estimation on the target demodulation reference signal;

a subsequence of a first length;

a subsequence of a second length;

a subsequence of a third length;

Further, the frequency division cover code sequence is generated by one of:

Further, the subsequence of the first length is at least one of:

A first subsequence [ +1, +1];

a second subsequence [ +1, -1];

a third subsequence [ -1, -1];

the fourth subsequence [ -1, +1].

Further, the subsequence of the second length is at least one of:

a fifth subsequence [ +1, +1];

a sixth subsequence [ +1, -1, +1, -1];

a seventh subsequence [ +1, -1, -1];

the eighth subsequence [ +1, -1, -1, +1].

Further, the subsequence of the third length is at least one of:

a ninth subsequence [ +1, +1];

a tenth subsequence [ +1, -1, +1, -1];

an eleventh subsequence [ +1, -1, -1, +1];

the twelfth subsequence [ +1, -1, -1, +1, -1].

The embodiment of the application enables the target DMRS to support more ports and improves the data traffic of transmission.

Based on the above embodiment, further, in a case where the first communication device is a terminal and the second communication device is a network side device, the radio frequency unit 1101 is further configured to:

Further, the processor 1110 is configured to perform channel estimation on the target demodulation reference signal based on the despreading window length.

Further, the despreading window length is 2 or 4.

Further, the processor 1110 is configured to perform at least one of:

Further, before the terminal receives the despreading instruction information from the network side device, the radio frequency unit 1101 is further configured to report a channel estimation capability of the terminal to the network side device.

Based on the above embodiment, further, in the case where the first communication device is a terminal and the second communication device is a network side device, before the terminal receives the target demodulation reference signal from the network side device, the radio frequency unit 1101 is further configured to report, to the network side device, a downlink data receiving capability supported by the terminal, where the downlink data receiving capability includes an RB number type capability of a physical downlink shared channel PDSCH supported by the terminal.

Further, the RB number type of the PDSCH includes one of:

the RB number of the PDSCH is even;

the number of RBs of the PDSCH is odd or even.

Further, the radio frequency unit 1101 is further configured to receive target configuration information from the network side device, where the target configuration information corresponds to downlink data receiving capability reported by the terminal, and the target configuration information is used to indicate the RB number type of the PDSCH received by the terminal.

The embodiment of the application ensures that the channel estimation of the target DMRS is more accurate.

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface, wherein the processor is used for generating N frequency division coverage code sequences by taking a subsequence with a target length as a basic unit and a resource mapping rule corresponding to the subsequence with the target length, the frequency division coverage code sequences are used for code division multiplexing of ports of demodulation reference signals of target demodulation reference signals, and the communication interface is used for generating and sending the target demodulation reference signals to the first communication equipment according to the N frequency division coverage code sequences. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 13, the network side device 1200 includes: an antenna 121, a radio frequency device 122, a baseband device 123, a processor 124, and a memory 125. The antenna 121 is connected to a radio frequency device 122. In the uplink direction, the radio frequency device 122 receives information via the antenna 121, and transmits the received information to the baseband device 123 for processing. In the downlink direction, the baseband device 123 processes information to be transmitted, and transmits the processed information to the radio frequency device 122, and the radio frequency device 122 processes the received information and transmits the processed information through the antenna 121.

The method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 123, where the baseband apparatus 123 includes a baseband processor.

The baseband apparatus 123 may, for example, include at least one baseband board, where a plurality of chips are disposed, as shown in fig. 13, where one chip, for example, a baseband processor, is connected to the memory 125 through a bus interface, so as to invoke a program in the memory 125 to perform the network device operation shown in the above method embodiment.

The network-side device may also include a network interface 126, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 1200 of the embodiment of the present application further includes: instructions or programs stored in the memory 125 and executable on the processor 124, the processor 124 invokes the instructions or programs in the memory 125 to perform the methods performed by the modules shown in fig. 7 and achieve the same technical effects, and are not repeated here.

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above embodiment of the demodulation reference signal transmission method, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or instructions, the various processes of the demodulation reference signal transmission method embodiment can be realized, the same technical effects can be achieved, and the repetition is avoided, and the description is omitted here.

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

The embodiments of the present application further provide a computer program/program product stored in a storage medium, where the computer program/program product is executed by at least one processor to implement each process of the above-mentioned demodulation reference signal transmission method embodiment, and achieve the same technical effects, and are not repeated herein.

The embodiment of the application also provides a demodulation reference signal transmission system, which comprises: the terminal can be used for executing the steps of the demodulation reference signal transmission method, and the network side equipment can be used for executing the steps of the demodulation reference signal transmission method.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A demodulation reference signal transmission method, comprising:

2. The method of claim 1, wherein the subsequence of the target length is one of:

a subsequence of a first length;

a subsequence of a second length;

a subsequence of a third length;

3. The method of claim 2, wherein the frequency division cover code sequence is generated by one of:

4. A method according to claim 2 or 3, wherein the subsequence of the first length is at least one of:

a first subsequence [ +1, +1];

a second subsequence [ +1, -1];

a third subsequence [ -1, -1];

the fourth subsequence [ -1, +1].

5. A method according to claim 2 or 3, wherein the subsequence of the second length is at least one of:

a fifth subsequence [ +1, +1];

a sixth subsequence [ +1, -1, +1, -1];

a seventh subsequence [ +1, -1, -1];

the eighth subsequence [ +1, -1, -1, +1].

6. A method according to claim 2 or 3, wherein the subsequence of the third length is at least one of:

a ninth subsequence [ +1, +1];

A tenth subsequence [ +1, -1, +1, -1];

an eleventh subsequence [ +1, -1, -1, +1];

the twelfth subsequence [ +1, -1, -1, +1, -1].

7. The method of claim 4, wherein the first mapping rule is to alternately map the first sub-sequence and the third sub-sequence to subcarriers on symbols occupied by ports in case that the frequency division cover code sequence is generated in the first sub-sequence and the third sub-sequence as a basic unit.

8. The method of claim 4, wherein the first mapping rule is to alternately map the second sub-sequence and the fourth sub-sequence to subcarriers on symbols occupied by ports in case that the frequency division cover code sequence is generated in a basic unit of the second sub-sequence and the fourth sub-sequence.

9. The method of claim 1, wherein the frequency division overlay code sequence is generated with a starting subcarrier of a common resource block with a sequence number of 0 as a starting position.

10. The method according to claim 2, wherein the target demodulation reference signal is a demodulation reference signal of a first configuration type or a second configuration type in the case of generating the frequency division cover code sequence in a base unit of a sub-sequence of a first length or a sub-sequence of a second length; wherein the first configuration type is related to a demodulation reference signal configuration type 1, and the second configuration type is related to a demodulation reference signal configuration type 2.

11. The method according to claim 2, wherein the target demodulation reference signal is of a first configuration type in case the frequency division cover code sequence is generated in a sub-sequence of a third length as a basic unit; wherein the first configuration type is related to demodulation reference signal configuration type 1.

12. The method according to claim 1, wherein in case the first communication device is a terminal and the second communication device is a network side device, the method further comprises:

13. The method of claim 12, wherein the first communication device performing channel estimation on the target demodulation reference signal comprises:

14. The method of claim 13, wherein the despreading window length is 2 or 4.

15. The method of claim 14, wherein the terminal channel estimates the target demodulation reference signal based on the despreading window length, comprising at least one of:

under the condition that the length of the despreading window is 2, aiming at ports belonging to the same code division multiplexing group in the target demodulation reference signal, the terminal carries out joint channel estimation by taking 2 adjacent subcarriers occupied by the ports on a symbol as despreading windows;

and under the condition that the length of the despreading window is 4, aiming at ports belonging to the same code division multiplexing group in the target demodulation reference signal, the terminal performs joint channel estimation by taking adjacent 4 subcarriers occupied by the ports on a symbol as despreading windows.

16. The method of claim 12, wherein before the terminal receives the despreading instruction information from the network side device, the method further comprises:

17. The method of claim 16, wherein the channel estimation capability is used to indicate whether the terminal supports demodulation reference signal channel estimation based on a despreading window length of 4.

18. The method according to claim 1, wherein in case the first communication device is a terminal and the second communication device is a network side device, before the terminal receives the target demodulation reference signal from the network side device, the method further comprises:

and the terminal reports the downlink data receiving capability supported by the terminal to the network side equipment, wherein the downlink data receiving capability comprises the capability of the RB number type of the physical downlink shared channel PDSCH supported by the terminal.

19. The method of claim 18, wherein the RB number type of the PDSCH comprises one of:

the RB number of the PDSCH is even;

the number of RBs of the PDSCH is odd or even.

20. The method according to claim 18, wherein the terminal receives target configuration information from the network side device, the target configuration information corresponding to downlink data reception capability reported by the terminal, the target configuration information being used to indicate the RB number type of PDSCH received by the terminal.

21. A demodulation reference signal transmission apparatus, comprising:

22. A demodulation reference signal transmission method, comprising:

wherein N is a positive integer.

23. The method of claim 22, wherein the subsequence of the target length is one of:

a subsequence of a first length;

A subsequence of a second length;

a subsequence of a third length;

24. The method of claim 23, wherein the generating the N frequency-division coverage code sequences with the target-length subsequence as a basic unit and with the resource mapping rule corresponding to the target-length subsequence comprises one of:

25. The method of claim 23 or 24, wherein the subsequence of the first length is at least one of:

a first subsequence [ +1, +1];

a second subsequence [ +1, -1];

a third subsequence [ -1, -1];

the fourth subsequence [ -1, +1].

26. The method of claim 23 or 24, wherein the subsequence of the second length is at least one of:

a fifth subsequence [ +1, +1];

a sixth subsequence [ +1, -1, +1, -1];

a seventh subsequence [ +1, -1, -1];

the eighth subsequence [ +1, -1, -1, +1].

27. The method according to claim 23 or 24, wherein the subsequence of the third length is at least one of:

a ninth subsequence [ +1, +1];

a tenth subsequence [ +1, -1, +1, -1];

an eleventh subsequence [ +1, -1, -1, +1];

the twelfth subsequence [ +1, -1, -1, +1, -1].

28. The method of claim 25, wherein the first mapping rule is to alternately map the first sub-sequence and the third sub-sequence to subcarriers on symbols occupied by ports in case that the frequency division coverage code sequence is generated in a basic unit of the first sub-sequence and the third sub-sequence.

29. The method of claim 25, wherein the first mapping rule is to alternately map the second sub-sequence and the fourth sub-sequence to subcarriers on symbols occupied by ports in case of generating the frequency division coverage code sequence in the second sub-sequence and the fourth sub-sequence as basic units.

30. The method of claim 22, wherein the frequency division overlay code sequence is generated with a starting subcarrier of a common resource block with sequence number 0 as a starting position.

31. The method according to claim 23, wherein the target demodulation reference signal is a demodulation reference signal of a first configuration type or a second configuration type in case that the frequency division cover code sequence is generated in a base unit of a sub-sequence of a first length or a sub-sequence of a second length; wherein the first configuration type is related to a demodulation reference signal configuration type 1, and the second configuration type is related to a demodulation reference signal configuration type 2.

32. The method according to claim 23, wherein the demodulation reference signal is of a first configuration type in case the frequency division cover code sequence is generated in a sub-sequence of a third length as a basic unit; wherein the first configuration type is related to demodulation reference signal configuration type 1.

33. The method according to claim 22, wherein in case the first communication device is a terminal and the second communication device is a network side device, the method further comprises:

34. The method of claim 33, wherein the despreading window length is 2 or 4.

35. The method of claim 33, wherein before the network side device sends despreading indication information to the terminal, the method further comprises:

36. The method of claim 35, wherein the channel estimation capability is used to indicate whether the terminal supports demodulation reference signal channel estimation based on a despreading window length of 4.

37. The method according to claim 22, wherein in the case where the first communication device is a terminal and the second communication device is a network side device, before the network side device transmits the target demodulation reference signal to the terminal, the method further comprises:

38. The method of claim 37, wherein the RB number type of the PDSCH comprises one of:

the RB number of the PDSCH is even;

the number of RBs of the PDSCH is odd or even.

39. The method according to claim 37, wherein the network side device sends target configuration information to the terminal, the target configuration information corresponding to downlink data reception capability supported by the terminal and received by the network side device from the terminal, the target configuration information being used to indicate the RB number type of the PDSCH received by the terminal.

40. A demodulation reference signal transmission apparatus, comprising:

wherein N is a positive integer.

41. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the demodulation reference signal transmission method according to any one of claims 1 to 17.

42. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the demodulation reference signal transmission method according to any one of claims 19 to 33.

43. A readable storage medium, characterized in that the readable storage medium stores thereon a program or instructions, which when executed by a processor, implements the demodulation reference signal transmission method according to any one of claims 1-20 or the steps of the demodulation reference signal transmission method according to any one of claims 22-39.