WO2023051738A1

WO2023051738A1 - Reference signal transmission method and communication apparatus

Info

Publication number: WO2023051738A1
Application number: PCT/CN2022/122866
Authority: WO
Inventors: 杨�远; 花梦; 汪浩
Original assignee: 华为技术有限公司
Priority date: 2021-09-30
Filing date: 2022-09-29
Publication date: 2023-04-06
Also published as: CN115913494A

Abstract

The present application provides a reference signal transmission method and a communication apparatus. The method comprises: a network device sending configuration information to a terminal device, the configuration information being used for configuring a plurality of initialization information groups for a reference signal, the reference signal being used for data channel demodulation, one of the plurality of initialization information groups comprising at least one initialization information, and the initialization information being used for generating the reference signal; the network device sending first indication information to the terminal device, the first indication information being used for indicating the first initialization information group among the plurality of initialization information groups; and the network device sending a first reference signal to the terminal device, initialization information of the first reference signal being first initialization information, and the first initialization information belonging to the first initialization information group. The flexibility of reference signal transmission can be improved, so as to improve the throughput of data transmission.

Description

Reference signal transmission method and communication device

This application claims the priority of the Chinese patent application with the application number 202111163576.6 and the title of "Reference Signal Transmission Method and Communication Device" filed with the State Intellectual Property Office of China on September 30, 2021, the entire contents of which are incorporated herein by reference In this application.

technical field

The present application relates to the communication field, and more specifically, relates to a reference signal transmission method and a communication device.

Background technique

In a wireless communication system, channel estimation is performed through a reference signal to realize data demodulation, for example, solutions in the fourth generation (4 ^th generation, 4G) mobile communication system and the fifth generation (5 ^th generation, 5G) mobile communication system A demodulation reference signal (demodulation reference signal, DMRS) is used for demodulation of the data channel.

In a multiple input multiple output (MIMO) transmission mode, demodulation of multiple data streams can be implemented by sending a plurality of mutually orthogonal reference signals corresponding to the multiple data streams. The multiple mutually orthogonal reference signals may be resource orthogonal in time domain, orthogonal in frequency resource or orthogonal in code domain resource. The number of data streams that can be transmitted simultaneously is limited by the number of orthogonal resources for reference signals. Therefore, the throughput of the current data transmission is also limited by the transmission mode of the reference signal.

Contents of the invention

The present application provides a reference signal transmission method and a communication device, which can improve the flexibility of reference signal transmission, so as to improve the throughput of data transmission.

In a first aspect, a method for transmitting a reference signal is provided, and the method may be executed by a network device or a module (such as a chip) configured (or used) in the network device.

The method includes: sending configuration information to the terminal device, the configuration information is used to configure a plurality of initialization information groups of a reference signal, the reference signal is used for data channel demodulation, and one initialization information group in the plurality of initialization information groups includes at least A piece of initialization information, where the initialization information is used to generate the reference signal; sending first indication information to the terminal device, where the first indication information is used to indicate the first initialization information group in the multiple initialization information groups; sending to the terminal device A first reference signal is sent, initialization information of the first reference signal is first initialization information, and the first initialization information group includes the first initialization information.

According to the above solution, the network device can configure multiple sets of initialization information for the terminal device, and notify the terminal device that the demodulation reference signal of the scheduled data channel uses one initialization information in one of the initialization information groups, which can realize the flexibility of the demodulation reference signal Transmission, network devices can instruct different terminal devices to use the same or different initialization information for reference signals within a transmission time interval (transmission time interval, TTI) based on the required throughput, and increase data when demodulation reference signal resources are limited flow count. The flexibility of data scheduling of network equipment is increased, and the throughput of data transmission can be improved.

With reference to the first aspect, in some implementation manners of the first aspect, the first indication information is carried in first control information, where the first control information is used to schedule a first data channel, and the first reference signal is used to resolve tune the first data channel.

According to the above solution, the network device can indicate the initialization information group to which the initialization information of the reference signal belongs through the control information used to schedule the data channel, so that the network device and the terminal device can perform the initialization described in the initialization information of the reference signal corresponding to the data channel. The information group reached a consensus.

With reference to the first aspect, in some implementation manners of the first aspect, the first indication information is carried in activation information, and the activation information is used to activate the first initialization information group, and the activation information is medium access control MAC control Element CE or second control information.

According to the solution above, the network device can activate one of the multiple initialization information groups through the activation information, and the network device and the terminal device use the initialization information in the activated initialization information group to generate a reference signal. The network device and the terminal device reach a consensus on the initialization information group (ie, the activated initialization information group) to which the initialization information of the reference signal corresponding to the data channel belongs. And it can avoid adding an indication field to indicate an initialization information group in the control information of the scheduling data channel.

With reference to the first aspect, in some implementation manners of the first aspect, the first indication information is carried in the first control information, and the first control information further includes second indication information, and the second indication information is used to indicate The first initialization information in the first initialization information group, or, the first initialization information is predefined initialization information in the first initialization information group.

Optionally, if the first control information does not include the second indication information, the first initialization information is predefined initialization information in the first initialization information group.

According to the above solution, the network device may indicate the initialization information of the reference signal through the control information of the scheduling data channel, or the initialization information of the reference signal may be predefined initialization information in the activated initialization information group. This enables the network device and the terminal device to reach a consensus on the initialization information of the reference signal.

With reference to the first aspect, in some implementation manners of the first aspect, the sending the first reference signal to the terminal device includes: sending Q reference signals to multiple terminal devices on the first resource, where the Q reference signals Including the first reference signal, Q is an integer greater than 1, wherein the maximum number of mutually orthogonal reference signals carried by the first resource is M, and M is a positive integer greater than 1, if the Q is less than or equal to the M, The initialization information of the Q reference signals is the same; if the Q is greater than the M, the Q reference signals include the same initialization information of the M reference signals.

That is to say, when the network device sends multiple reference signals to multiple terminal devices, it preferentially uses the orthogonal M reference signal resources to carry reference signals, and the initialization information of the M reference signal carried on the M reference signal resources same. When the M orthogonal reference signal resources are all used, by indicating different initialization information, reference signals with different initialization information are carried on the same reference signal resource. The terminal device is enabled to distinguish the M reference signals, so as to realize the demodulation of the data stream corresponding to the reference signals.

With reference to the first aspect, in some implementation manners of the first aspect, the Q reference signals correspond to the Q antenna ports, and one of the Q reference signals is sent by the corresponding antenna port.

With reference to the first aspect, in some implementations of the first aspect, the serving cell of the terminal device includes K initialization information groups, K is an integer greater than 1, and the K initialization information groups include the multiple initialization information groups, The maximum number of reference signals carried by the first resource is P, where P is the product of the K and the M.

According to the solution above, by configuring multiple initialization information groups, the transmission of DMRS is not limited to the number of orthogonal resources, the resource utilization rate of DMRS transmission resources can be improved, and the flexible transmission of DMRS is realized. Corresponding mechanisms are also needed in the system to support the flexible transmission of DMRS between network equipment and terminal equipment.

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: generating the initialization information group according to the cell identification information and/or according to the group identification information of the initialization information group, wherein the cell identification information The identification information of the serving cell of the terminal device, at least two initialization information groups in the plurality of initialization information groups contain different initialization information.

In a second aspect, a method for transmitting a reference signal is provided, and the method may be executed by a terminal device or a module (such as a chip) configured (or used) in the terminal device.

The method includes: receiving configuration information from a network device, the configuration information is used to configure a plurality of initialization information groups of a reference signal, the reference signal is used for data channel demodulation, and one initialization information group in the plurality of initialization information groups includes At least one piece of initialization information, where the initialization information is used to generate the reference signal; receiving first indication information from the network device, where the first indication information is used to indicate the first initialization information in the plurality of initialization information groups; receiving from the The first reference signal of the network device, the initialization information of the first reference signal is first initialization information, and the first initialization information belongs to the first initialization information group.

With reference to the second aspect, in some implementations of the second aspect, the first indication information is carried in first control information, where the first control information is used to schedule a first data channel, and the first reference signal is used to resolve tune the first data channel; or, the first indication information is carried in activation information, and the activation information is used to activate the first initialization information group in the multiple initialization information groups, and the activation information is medium access control MAC control Element CE or second control information.

With reference to the second aspect, in some implementation manners of the second aspect, the first indication information is carried in the first control information, and the first control information further includes second indication information, and the second indication information is used to indicate The first initialization information in the first initialization information group, or, the first initialization information is predefined initialization information in the first initialization information group.

In a third aspect, a communication device is provided, which includes: a processing unit, configured to determine a plurality of initialization information groups of a reference signal, one initialization information group in the plurality of initialization information groups includes at least one initialization information, and the initialization The information is used to generate the reference signal, and the reference signal is used for data channel demodulation; the transceiver unit is used to send configuration information to the terminal device, and the configuration information is used to configure the multiple initialization information groups; the transceiver unit is also used for Sending first indication information to the terminal device, where the first indication information is used to indicate a first initialization information group in the multiple initialization information groups; the transceiver unit is further configured to send a first reference signal to the terminal device, the The initialization information of the first reference signal is first initialization information, and the first initialization information group includes the first initialization information.

With reference to the third aspect, in some implementation manners of the third aspect, the first indication information is carried in first control information, where the first control information is used to schedule a first data channel, and the first reference signal is used to resolve tune the first data channel; or, the first indication information is carried in the activation information, and the activation information is used to activate the first initialization information group, and the activation information is the medium access control MAC control element CE or the second control information .

With reference to the third aspect, in some implementation manners of the third aspect, the first indication information is carried in the first control information, and the first control information further includes second indication information, and the second indication information is used to indicate The first initialization information in the first initialization information group, or, the first initialization information is predefined initialization information in the first initialization information group.

With reference to the third aspect, in some implementation manners of the third aspect, the transceiver unit is specifically configured to send Q reference signals to multiple terminal devices on the first resource, where the Q reference signals include the first reference signal , Q is an integer greater than 1, wherein the maximum number of mutually orthogonal reference signals carried by the first resource is M, and M is a positive integer greater than 1, if the Q is less than or equal to the M, the number of the Q reference signals The initialization information is the same; if the Q is greater than the M, the Q reference signals include the same initialization information of the M reference signals.

With reference to the third aspect, in some implementation manners of the third aspect, the Q reference signals correspond to the Q antenna ports, and one of the Q reference signals is sent by the corresponding antenna port.

With reference to the third aspect, in some implementations of the third aspect, the serving cell of the terminal device includes K initialization information groups, K is an integer greater than 1, and the K initialization information groups include the multiple initialization information groups, The maximum number of reference signals carried by the first resource is P, where P is the product of the K and the M.

With reference to the third aspect, in some implementation manners of the third aspect, the processing unit is specifically configured to generate the initialization information group according to the cell identification information of the serving cell and/or according to the group identification information of the initialization information group, wherein , at least two initialization information groups in the plurality of initialization information groups contain different initialization information.

In a fourth aspect, a communication device is provided, which includes: a transceiver unit, configured to receive configuration information from a network device, the configuration information is used to configure a plurality of initialization information groups of a reference signal, the reference signal is used for a data channel For demodulation, one initialization information group in the plurality of initialization information groups includes at least one initialization information, and the initialization information is used to generate the reference signal; the transceiver unit is also used to receive first indication information from the network device, the The first indication information is used to indicate the first initialization information in the plurality of initialization information groups; the transceiver unit is also used to receive the first reference signal from the network device; the processing unit is used to determine the first reference signal of the first reference signal The initialization information is first initialization information, wherein the first initialization information belongs to the first initialization information group.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first indication information is carried in first control information, where the first control information is used to schedule a first data channel, and the first reference signal is used to resolve tune the first data channel; or, the first indication information is carried in activation information, and the activation information is used to activate the first initialization information group in the multiple initialization information groups, and the activation information is medium access control MAC control Element CE or second control information.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first indication information is carried in the first control information, and the first control information further includes second indication information, and the second indication information is used to indicate The first initialization information in the first initialization information group, or, the first initialization information is predefined initialization information in the first initialization information group.

In a fifth aspect, a communication device is provided, including a processor. The processor may implement the first aspect and the method in any possible implementation manner of the first aspect.

Optionally, the communication device further includes a memory, and the processor is coupled to the memory, and the processor is configured to execute instructions in the memory, so as to implement the method in the above first aspect and any possible implementation manner of the first aspect.

Optionally, the communication device further includes a communication interface, and the processor is coupled to the communication interface. In this embodiment of the present application, the communication interface may be a transceiver, a pin, a circuit, a bus, a module or other types of communication interfaces, without limitation.

In an implementation manner, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip configured in a network device. When the communication device is a chip configured in a network device, the communication interface may be an input/output interface, and the processor may be a logic circuit.

Optionally, the transceiver may be a transceiver circuit. Optionally, the input/output interface may be an input/output circuit.

In a sixth aspect, a communication device is provided, including a processor. The processor may implement the second aspect and the method in any possible implementation manner of the second aspect.

Optionally, the communication device further includes a memory, and the processor is coupled to the memory, and can be used to execute instructions in the memory, so as to implement the above second aspect and the method in any possible implementation manner of the second aspect.

In an implementation manner, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the communication device is a chip configured in a terminal device. When the communication device is a chip configured in a terminal device, the communication interface may be an input/output interface, and the processor may be a logic circuit.

In a seventh aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in the first aspect and any possible implementation manner of the first aspect, or executes the second aspect and the method in the first aspect A method in any possible implementation manner in the two aspects.

In a specific implementation process, the above-mentioned processor may be one or more chips, the input circuit may be an input pin, and the output circuit may be an output pin.

In an eighth aspect, a computer program product is provided, and the computer program product includes: a computer program (also referred to as code, or an instruction), when the computer program is executed, it can realize any of the first aspect and the first aspect. A method in a possible implementation manner, or execute the method in the second aspect or any one of the possible implementation manners of the second aspect.

In the ninth aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores a computer program (also referred to as code, or instruction) which can realize the first aspect and the first aspect when it is run on a computer. The method in any possible implementation manner of the second aspect, or execute the second aspect and the method in any possible implementation manner of the second aspect.

A tenth aspect provides a communication system, including at least one communication device provided in the first aspect and any possible implementation of the first aspect, and at least one second aspect and any possible implementation of the second aspect The communication device provided in.

Description of drawings

FIG. 1 is a schematic diagram of a communication system applicable to an embodiment of the present application;

Fig. 2 is a schematic diagram of DMRS configuration type 1 provided by the embodiment of the present application;

FIG. 3 is another schematic diagram of DMRS configuration type 1 provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of DMRS configuration type 2 provided by the embodiment of the present application;

FIG. 5 is another schematic diagram of DMRS configuration type 2 provided by the embodiment of the present application;

FIG. 6 is a schematic flowchart of a reference signal transmission method provided by an embodiment of the present application;

FIG. 7 is a schematic block diagram of a communication device provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below with reference to the accompanying drawings.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The terms "first", "second" and the like in the description, claims, and above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The technical solution of the embodiment of the present application can be applied to various communication systems, for example: long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex) , TDD), universal mobile telecommunications system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5th generation, 5G) system or new wireless ( new radio, NR) and future communication systems, such as the sixth generation mobile communication system. This application is not limited to this.

Fig. 1 is a schematic structural diagram of a communication system applicable to this application.

As shown in FIG. 1 , the communication system 100 may include at least one network device, such as network device 101 in FIG. 1 ; the communication system 100 may also include at least one terminal device, such as terminal devices 102 to 107 in FIG. 1 . Wherein, the terminal devices 102 to 107 may be mobile or fixed. Each of the network device 101 and one or more of the terminal devices 102 to 107 may communicate via a wireless link. The wireless communication method provided by the embodiment of the present application may be used for communication between the network device and the terminal device.

The terminal equipment in the embodiment of the present application may also be referred to as user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal , wireless communication device, user agent, or user device. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless Terminals, wireless terminals in autonomous driving, wireless terminals in telemedicine, wireless terminals in smart grid, wireless terminals in transportation security, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones , session initiation protocol (session initiation protocol, SIP) telephone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device, vehicle-mounted device , wearable devices, terminal devices in the 5G network or terminal devices in the future evolved public land mobile network (PLMN), etc. It should be understood that the present application does not limit the specific form of the terminal device.

The network device in this embodiment of the present application may be a device in an access network that has a wireless transceiver function. The equipment includes but is not limited to: base station, evolved node B (evolved node B, eNB), radio network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (wireless fidelity, WIFI) system Access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP), etc. The device may also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (distributed unit, DU). It should be understood that the present application does not limit the specific form of the network device.

Related technologies and terms involved in the embodiments of the present application are described below.

The sequence of the demodulation reference signal (demodulation reference signal, DMRS) can be generated based on the following formula:

Among them, c(i) is a pseudo-random sequence, and the initialization sequence of the pseudo-random sequence can be shown in the following formula:

Wherein, l is the serial number of the orthogonal frequency division multiple access (orthogonal frequency division multiplexing, OFDM) symbol in the time slot,

is the number of a time slot in a radio frame. It should be noted that a radio frame includes a plurality of time slots, and a time slot includes a plurality of OFDM symbols.

It is the initialization scrambling code for the initialization sequence c _init . in,

It is related to the code division multiplexing (code division multiple, CDM) group λ where the DMRS described below is located. Optionally,

can identify information for the cell

Right now

DMRS can be mapped to one or two OFDM symbols in a slot, and DMRS can be mapped to physical resources based on DMRS configuration type 1 and configuration type 2.

Figure 2 is a schematic diagram of the DMRS configuration type 1 of an OFDM symbol. One OFDM symbol in the time domain and one subcarrier in the frequency domain form a resource element (resource element, RE). Figure 2 shows 12 REs on an OFDM symbol. RE, namely RE 0 to RE 11. For DMRS configuration type 1, on an OFDM symbol, the RE set with every RE interval can map the DMRS corresponding to two antenna ports, for example,

RE

0, 2, 4, 8, 10, and 12 are antenna port 0 (that is, in Table 1 The port of p=1000) and the DMRS RE corresponding to antenna port 1 (that is, the port of p=1001 in Table 1, which will not be described in detail below). That is to say, the DMRS sent by antenna port 0 and antenna port 1 can be mapped on

RE

0, 2, 4, 6, 8, and 10.

RE

0, 2, 4, 8, 10, and 12 belong to a CDM group, such as CDM group 0 (that is, λ=0 in Table 1), and the reference signals sent by antenna port 0 and antenna port 1 are orthogonal through spreading codes.

RE

1, 3, 5, 7, 9, and 11 are DMRS REs corresponding to antenna port 2 and antenna port 3.

RE

1, 3, 5, 7, 9, and 11 belong to a CDM group, such as CDM group 1 (that is, λ=1 in Table 1), and the reference signals sent by antenna port 2 and antenna port 3 are orthogonal through spreading codes. It can be seen that the DMRS configuration type 1 of one OFDM symbol can map at most 4 mutually orthogonal DMRSs, and one or more items of time domain resources, frequency domain resources or spreading codes of the 4 DMRSs are mutually orthogonal.

Figure 3 is a schematic diagram of DMRS configuration type 1 of two OFDM symbols. For DMRS configuration type 1, the set of REs on two OFDM symbols separated by one RE can map the DMRS corresponding to four antenna ports, for example, two OFDM symbols RE 0, 2, 4, 6, 8, and 10 above are DMRS REs corresponding to

antenna ports

0, 1, 4, and 5, and belong to CDM group 0 (that is, λ=0 in Table 1).

RE

1, 3, 5, 7, 9, and 11 on the two symbols are DMRS REs corresponding to

antenna ports

2, 3, 6, and 7, and belong to CDM group 1 (that is, λ=1 in Table 1). Therefore, the DMRS configuration type 1 of two OFDM symbols can map at most 8 mutually orthogonal DMRSs, and one or more items of time domain resources, frequency domain resources or spreading codes of the 8 DMRSs are mutually orthogonal.

Fig. 4 is a schematic diagram of DMRS configuration type 2 of an OFDM symbol. For DMRS configuration type 2, on one OFDM symbol,

RE

0, 1, 6, and 7 are DMRS REs corresponding to antenna port 0 and antenna port 1, and belong to CDM group 0 (that is, λ=0 in Table 2).

RE

2, 3, 8, and 9 are DMRS REs corresponding to antenna port 2 and antenna port 3, and belong to CDM group 1 (that is, λ=1 in Table 2).

RE

4, 5, 10, and 11 are DMRS REs corresponding to antenna port 4 and antenna port 5, and belong to CDM group 2 (that is, λ=2 in Table 2). Therefore, the DMRS configuration type 2 of an OFDM symbol can map at most 6 mutually orthogonal DMRSs, and one or more items of time domain resources, frequency domain resources or spreading codes of the 6 DMRSs are mutually orthogonal.

It should be noted that one reference signal corresponds to one antenna port, and one reference signal is sent by the antenna port corresponding to the reference signal, and is used to demodulate the data stream sent by the antenna port.

FIG. 5 is a schematic diagram of DMRS configuration type 2 of an OFDM symbol. For DMRS configuration type 2,

RE

0, 1, 6, and 7 on the two OFDM symbols are DMRS REs corresponding to

antenna ports

0, 1, 6, and 7, and belong to CDM group 0 (that is, λ=0 in Table 2).

RE

2, 3, 8, and 9 on the two symbols are DMRS REs corresponding to

antenna ports

2, 3, 8, and 9, and belong to CDM group 1 (that is, λ=1 in Table 2).

RE

4, 5, 10, and 11 on the two symbols are DMRS REs corresponding to

antenna ports

4, 5, 10, and 11, and belong to CDM group 2 (that is, λ=2 in Table 2). Therefore, the DMRS configuration type 2 of two OFDM symbols can map up to 12 mutually orthogonal DMRSs, and one or more items of time domain resources, frequency domain resources or spreading codes of the 12 DMRSs are mutually orthogonal.

DMRS symbols mapped in RE(k,l) _p,μ

It can be obtained according to the following formula, where RE(l,k) _p,μ is the RE at the kth subcarrier position on the lth OFDM symbol in a time slot.

k'=0,1;

Wherein, the spreading codes w _f (k'), w _t (l'), and Δ can be obtained according to Table 1 or Table 2.

is the power control factor.

Table 1 PDSCH DMRS Configuration Type 1 Parameters

Table 2 PDSCH DMRS configuration type 2 parameters

In summary, multiple DMRS transmitted by multiple antenna ports can be orthogonalized by time domain resources (for example, mapped on different OFDM symbols), frequency domain resources orthogonally (for example, mapped on different subcarriers) or One or more of code domain resource orthogonality (for example, using mutually orthogonal spreading codes) implements orthogonality of DMRS, so that the receiving end can implement demodulation of multiple data streams based on the multiple DMRSs. It can be seen that the number of simultaneously transmitted data streams is limited by the number of orthogonal resources of the reference signal. For example, the DMRS configuration type 1 of 2 OFDM symbols supports the transmission of up to 8 mutually orthogonal DMRSs. The 8 orthogonal DMRSs correspond to 8 antenna ports, and the network device can transmit 8 data streams through 8 antenna ports at most. This enables the terminal device to respectively demodulate the 8 data streams based on the 8 orthogonal DMRSs. For another example, the DMRS configuration type 2 of 2 OFDM symbols supports the transmission of up to 12 mutually orthogonal DMRSs. The 12 orthogonal DMRSs correspond to 12 antenna ports, and the network device can send up to 12 data streams through 12 antenna ports. , so that the terminal device can respectively demodulate the 12 data streams based on the 12 orthogonal DMRSs.

Based on the above transmission method, the number of DMRS transmission can be increased by increasing the number of OFDM symbols for transmission of DMRS to increase the number of data streams, but increasing the number of OFDM symbols for transmission of DMRS, correspondingly, the number of OFDM symbols for transmission of data will decrease, which will affect the number of data streams. The throughput of the transfer.

Considering that if the sequence of the DMRS mapped on the same DMRS transmission resource is different, the receiving end can distinguish different DMRSs on the same DMRS transmission resource according to the DMRS sequence, therefore, the initialization sequence c _init can be changed to generate different DMRS sequences r(n ). DMRSs of different sequences are mapped on the same DMRS transmission resource, so that the receiving end can distinguish different DMRS sequences on the DMRS resource, and realize the demodulation of corresponding data streams. Wherein, the same DMRS transmission resource refers to a DMRS resource with the same time domain resource (such as OFDM symbol), frequency domain resource (subcarrier) and spreading code.

The network device can configure one or two initialization scramble codes through radio resource control (radio resource control, RRC) message, such as

(Right now

),and

(Right now

),in,

When the RRC message is configured with two initialization scrambling codes, the downlink control information (DCI) of the scheduled physical downlink shared channel (physical downlink shared channel, PDSCH) may include a DMRS initialization information indication field, which is used to indicate the use of the DMRS The initial scrambling code.

According to the above description, for DMRS with the same initialization sequence, DMRS configuration type 1 and configuration type 2 can map 8 mutually orthogonal DMRS and mutually orthogonal There are 12 DMRSs, and for two DMRS sequences with different initialization sequences, two different DMRSs can be mapped on the same DMRS transmission resource. Then DMRS configuration type 1 and configuration type 2 can respectively map 16 DMRSs and 24 DMRSs on 2 OFDM symbols.

With the development of large-scale mass communication, higher requirements are put forward for data transmission throughput, and DMRS transmission mode has become the key to improving data throughput. Increasing the number of DMRS sequences can increase the number of data transmission streams without increasing DMRS transmission resources, so that DMRS transmission is not limited to the number of orthogonal resources, which can improve the resource utilization of DMRS transmission resources and realize DMRS. Flexible transmission. Corresponding mechanisms are also needed in the system to support the flexible transmission of DMRS between network equipment and terminal equipment.

The reference signal transmission method provided by the embodiment of the present application will be described below with reference to the accompanying drawings.

FIG. 6 is a schematic flowchart of a reference signal transmission method 600 provided by an embodiment of the present application.

S601. The network device sends configuration information to the terminal device, where the configuration information is used to configure multiple initialization information groups of the reference signal.

Wherein, one initialization information group in the plurality of initialization information groups includes at least one initialization information. The initialization information is used to generate reference signals for data channel demodulation.

For example, the reference signal may be a DMRS, and the initialization information may be an initialization scramble for generating an initialization sequence of the DMRS

But the present application is not limited thereto.

Correspondingly, the terminal device receives the configuration information from the network device, and determines multiple initialization information groups of the reference signal according to the configuration information.

The serving cell of the terminal device may include K initialization information groups, where K is an integer greater than 1. Wherein, the K initialization information groups include multiple initialization information groups configured by the configuration information. Optionally, the network device may generate an initialization information group according to the cell identification information of the cell and/or according to the group identification information of the initialization information group. Wherein, at least two initialization information groups in the plurality of initialization information groups include different initialization information.

For example, a generation function of the initialization information group may be predefined, and parameters of the generation function may include cell identification information. The network device generates K initialization information groups of the cell according to the generation function and the cell identification information of the cell, and the K initialization information groups include different initialization information.

For another example, the K initialization information groups can be generated according to the group identification information of the initialization information groups. For example, one initialization information group includes 2 initialization information, denoted as

The group identification information is the group serial number, then the first group

The group identification information of is 1,

Second Group

The group identification information of the group is 2,

Other groups are generated in a similar manner, that is, the tens digit of the initialization information is the group identification information, and the ones digit is the identification information of the initialization information within the group.

For another example, the K initialization information groups can be generated according to the cell identification information and the group identification information of the initialization information groups. For example, one initialization information group includes 2 initialization information, denoted as

The group identification information is the group serial number, and the cell identification information is

then the first group

The group identification information of is 1,

Second Group

The group identification information of the group is 2,

Other groups are generated in a similar manner, that is, the low digit of the initialization information is 2 (k-1)+i, where k is the group number, i is the identification information of the initialization information in the group, and the high digit of the initialization information is the cell Identification information.

Optionally, when the network device generates the initialization information of each cell, the initialization information groups between adjacent cells may be different. Mutual interference between reference signals of adjacent cells can be reduced.

As an example without limitation, the configuration information is an RRC message.

Optionally, the network device may send the configuration information to the terminal device after the terminal device enters the RRC_CONNECTIED state.

For example, after the terminal equipment transitions from the RRC idle (RRC_IDLE) state to the RRC connected state, or after the terminal equipment transitions from the RRC inactive (RRC_INACTIVE) state to the RRC connected state, the network equipment sends the configuration information to the terminal equipment to notify The initialization information group of the reference signal that can be used by the terminal equipment.

S602. The network device sends first indication information to the terminal device, where the first indication information is used to indicate a first initialization information group in the multiple initialization information groups.

Correspondingly, the terminal device receives the first indication information from the network device.

In an implementation manner, the first indication information is carried in first control information, and the first control information is used to schedule the first data channel.

For example, the first control information is DCI for scheduling the PDSCH, and the first indication information may be an indication field of the first control information. After receiving the DCI, the terminal device may determine the initialization information group to which the initialization information of the demodulation reference signal of the PDSCH scheduled by the DCI belongs according to the first indication information in the DCI.

In another implementation manner, the first indication information is carried in activation information, and the activation information is used to activate the first initialization information group. The activation information is a radio access control (media access control, MAC) control element (control element, CE), or the activation information is second control information.

For example, the network device may notify the terminal device through the activation information to activate the first initialization information in the multiple initialization information groups. And use the initialization information in the activated first initialization information group within a period of time to generate a demodulation reference signal to be sent to the terminal device. Wherein, the period of time may be a preset duration. Alternatively, the network device and the terminal device may use the initialization information in the first initialization information group to generate the demodulation reference signal before receiving the next activation information. Alternatively, the network device and the terminal device may use the initialization information in the first initialization information group to generate the demodulation reference signal before receiving the deactivation information for deactivating the first initialization information group. But the present application is not limited thereto.

S603. The network device sends a first reference signal to the terminal device, where initialization information of the first reference signal is first initialization information, and the first initialization information group includes the first initialization information.

Correspondingly, the terminal device receives the first reference signal from the network device.

Before sending the first reference signal to the terminal device, the network device sends to the terminal device first control information for scheduling the first data channel. The first reference signal is used for demodulation of the first data channel. The terminal device may generate the first reference signal according to the first initialization information, and demodulate the first data channel according to the first reference signal.

In an implementation manner, the first control information further includes second indication information, where the second indication information is used to indicate the first initialization information in the first initialization information group.

That is to say, the network device may indicate the use of the first initialization information of the demodulation reference signal of the first data channel by scheduling the first control information of the first data channel. After receiving the first control information, the terminal device determines the first initialization information for use of the demodulation reference signal of the first data channel. The network device and the terminal device reach a consensus on the initialization information of the first reference signal.

In another implementation manner, the first initialization information is predefined initialization information in the first initialization information group.

Optionally, if the first control information does not include the second indication information, the terminal device may determine that the initialization information of the first reference signal is the predefined initialization information in the first initialization information group, that is, the first initialization information.

For example, the protocol may stipulate that the predefined initialization information in an initialization information group is the first initialization information or the last initialization information. The network device and the terminal device can reach a consensus on the predefined initialization information, and generate a demodulation reference signal based on the predefined initialization information.

According to the above solution, the network device can configure multiple sets of initialization information for the terminal device, and notify the terminal device that the demodulation reference signal of the scheduled data channel uses one initialization information in one of the initialization information groups, which can realize the flexibility of the demodulation reference signal Transmission, network devices can instruct different terminal devices to use the same or different initialization information for reference signals within a transmission time interval (transmission time interval, TTI) based on the required throughput, and increase data when demodulation reference signal resources are limited flow count.

For example, the network device determines that 36 data streams need to be transmitted to multiple terminal devices based on the required throughput. If the demodulation reference signal adopts 2 OFDM configuration type 2, the 24 orthogonal reference signals on the 2 OFDM symbols 36 demodulation reference signals need to be sent on the resource. The network device may indicate the initialization information of the reference signal to the multiple terminal devices, so that among the reference signal resources carrying (or referred to as mapping) multiple reference signals in the 24 orthogonal reference signal resources, the multiple reference signal resources The initialization information is different, so that the terminal device can distinguish different reference signals on the same reference signal resource, successfully receive the corresponding reference signal, and realize data demodulation of 36 data streams. Wherein, one reference signal resource refers to a reference signal resource having the same time domain position, frequency domain position, and spreading code used in the code domain. For example, a reference signal resource corresponding to a spreading code in a CDM group. The solution provided by the embodiment of the present application can transmit multiple DMRSs of different sequences on the same reference signal transmission resource without increasing the reference signal transmission resources and ensuring the maximum number of orthogonal DMRSs that can be transmitted on the reference signal transmission resources. The reference signal increases the number of reference signals that can be transmitted on the reference signal transmission resource, and improves the resource utilization rate of the reference signal transmission resource. The limitation of the reference signal transmission resource on the data throughput is reduced, the flexible transmission of the reference signal is realized, and the flexibility of data scheduling of the network device is increased, and the data transmission throughput can be improved.

Optionally, the network device sending the first reference signal to the terminal device includes: the network device sends Q reference signals to multiple terminal devices on the first resource, the Q reference signals include the first reference signal, and Q is greater than An integer of 1, where the maximum number of mutually orthogonal reference signals carried by the first resource is M, and M is a positive integer greater than 1,

If Q is less than or equal to M, the initialization information of the Q reference signals is the same;

If Q is greater than the M, the Q reference signals include M reference signals with the same initialization information.

That is to say, the first resource includes M orthogonal reference signal resources, and can carry M mutually orthogonal reference signals. When the network device sends multiple reference signals to multiple terminal devices, the M orthogonal resources are preferentially used. The reference signal resources carry reference signals, and the M reference signals carried on the M reference signal resources have the same initialization information. When the M orthogonal reference signal resources are all used, by indicating different initialization information, reference signals with different initialization information are carried on the same reference signal resource. That is to say, the first resource carries at most M reference signals with the same initialization information. The M reference signals are on different reference signal resources, that is, at least one of time domain resources, frequency domain resources or spreading codes of the M reference signals is different. The terminal device is enabled to distinguish the M reference signals, so as to realize the demodulation of the data stream corresponding to the reference signals.

Optionally, if Q is greater than M, the Q reference signals include multiple reference signal groups, where each reference signal group includes at most M reference signals, and the initialization information of the reference signals in the same reference signal group is the same, and are orthogonal to each other. The initialization information of the reference signals in every two reference signal groups in the plurality of reference signal groups is different.

The Q reference signals may include H reference signal groups, where,

The H reference signal groups include at least H-1 reference signal groups including M reference signals, the M reference signals in the same reference signal group have the same initialization information, and are respectively mapped to the M reference signals in the first resource In terms of resources, the H reference signal groups include one reference signal group including QM (H-1) reference signals, the initialization information of the QM (H-1) reference signals is the same, and are respectively mapped on the M on QM·(H-1) reference signal resources among the reference signal resources. This enables multiple reference signals that can be mapped on one reference signal resource to belong to different reference signal groups, and the initialization information of the reference signals in different reference signal groups is different.

It should be noted that one or more reference signals among the Q reference signals may be sent to one terminal device among the multiple terminal devices, that is, one or more reference signals may be sent to one terminal device among the multiple terminal devices. The reference signal realizes single-stream or multi-stream data transmission of a single terminal device in multiple user-MIMO (MU-MIMO).

This application is not limited to this. The first resource may be an OFDM symbol resource used to transmit a demodulation reference signal within one TTI. For example, TTI is a time slot, if one OFDM symbol is used to transmit demodulation reference signal in one time slot, then this OFDM symbol is the first resource, if two OFDM symbols are used to transmit demodulation reference signal in one time slot signal, the two OFDM symbols are the first resource. The TTI can also be a subframe or an OFDM symbol group, which is not limited in this application.

Optionally, the serving cell of the terminal device includes K initialization information groups, where K is an integer greater than 1. The maximum number of reference signals carried by the first resource is P, where P is the product of the K and the M.

That is to say, if the first resource includes M orthogonal reference signal resources and can carry M orthogonal reference signal resources at most, the number of reference signals that the network device can send on the first resource is initialized by M and the cell The information group K determines that P=K·M reference signals can be carried on the first resource. Wherein, one reference signal resource among the M reference signal resources can carry K reference signals at most.

Optionally, the network device may preferentially map reference signals with the same initialization information in the same CDM group.

In a specific implementation, if the initialization information groups configured by different terminal devices in a cell may not be exactly the same, so that the reference signals sent in one TTI cannot guarantee that the reference signals all use the same initialization information when the number of reference signals is less than M. For example, a network device sends R reference signals to multiple terminal devices, wherein the R reference signals include L reference signals with the same initialization information, and L<R, L<M, then the network device can preferentially send the same initialization information The reference signals are mapped in the same CDM group, and the reference signals with the same initialization information mapped in the same CDM group use different spreading codes, so as to realize mutual orthogonality.

For example, the network device sends seven reference signals, such as reference signal 1 to reference signal 7, to multiple terminal devices. Among the five reference signals, the initialization information of the reference signal 1, the reference signal 2 and the reference signal 3 are the same, and the initialization information of the reference signal 4 and the reference signal 5 are the same. If one OFDM symbol in one TTI adopts configuration type 2 to carry demodulation reference signals, one OFDM includes six orthogonal reference signal resources. Then the network device can preferentially map reference signals with the same initialization information to the same CDM group, for example, the network device maps reference signal 1 and reference signal 2 to CDM group 0, and the spreading codes of reference signal 1 and reference signal 2 are different . And, the network device maps the reference signal 4 and the reference signal 5 into the CDM group 1, and the spreading codes of the reference signal 4 and the reference signal 5 are different. Then, the reference signal 3 and the reference signal 6 are mapped to the CDM group 2. Optionally, the spreading codes of the reference signal 3 and the reference signal 6 may be the same or different. When the six orthogonal reference signal resources are all used, the reference signal 7 is mapped to one of the CDM groups. The initialization information of the reference signal 7 and other reference signals carried by the mapped CDM group is different, and the terminal device can distinguish the CDM group. The reference signal in .

According to the above solution, the network device can configure multiple sets of initialization information for the terminal device, and the demodulation reference signal can be implemented by instructing the terminal device to use one initialization information in one of the initialization information groups for the demodulation reference signal of the scheduled data channel. Flexible transmission, based on the required throughput, the network device can instruct different terminal devices to use the same or different initialization information for the reference signal in one TTI, and increase the number of data streams when the demodulation reference signal resources are limited. It is possible to transmit multiple reference signals of different sequences on the same reference signal transmission resource without increasing the reference signal transmission resources and ensuring the maximum number of orthogonal DMRSs that can be transmitted on the reference signal transmission resources, increasing the reference signal transmission The number of reference signals that can be transmitted on the resource improves the resource utilization rate of the reference signal transmission resource. The limitation of the reference signal transmission resource on the data throughput is reduced, the flexible transmission of the reference signal is realized, and the flexibility of data scheduling of the network equipment is increased, so that the data transmission throughput can be improved.

Above, the method provided by the embodiment of the present application is described in detail with reference to FIG. 2 to FIG. 6 . Hereinafter, the communication device and the communication device provided by the embodiments of the present application will be described in detail with reference to FIG. 7 to FIG. 9 . In order to realize the functions in the methods provided by the above embodiments of the present application, each network element may include a hardware structure and/or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above-mentioned functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

Fig. 7 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in FIG. 7 , the communication device 700 may include a transceiver unit 720 .

In a possible design, the communication device 700 may correspond to the terminal device in the foregoing method embodiments, and the communication device 700 may be a terminal device or a device configured on the terminal device, such as a chip.

It should be understood that the communication device 700 may correspond to the terminal device in the method according to the above embodiments of the present application, and the communication device 700 may include a unit for executing the method performed by the terminal device in the method in FIG. 6 . Moreover, each unit in the communication device 700 and the above-mentioned other operations and/or functions are respectively intended to implement a corresponding flow of the method in FIG. 6 .

Optionally, the communication device 700 may further include a processing unit 710, and the processing unit 710 may be configured to process instructions or data to implement corresponding operations.

It should also be understood that when the communication device 700 is a chip configured in (or used in) a terminal device, the transceiver unit 720 in the communication device 700 may be an input/output interface or circuit of the chip, and the processing in the communication device 700 Unit 710 may be a processor in a chip.

Optionally, the communication device 700 may further include a storage unit 730, which may be used to store instructions or data, and the processing unit 710 may execute the instructions or data stored in the storage unit, so that the communication device realizes corresponding operations .

It should also be understood that the specific process for each unit to perform the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, details are not repeated here.

In another possible design, the communication device 700 may correspond to the communication device in the foregoing method embodiments. The communication device 700 may be a communication device or a device configured in the communication device, such as a chip. Wherein, the communication device may be a terminal device or a network device.

It should be understood that the communication device 700 may correspond to the communication device in the method according to the above embodiments of the present application, and the communication device 700 may include a unit for performing the method performed by the communication device in the method in FIG. 6 . Moreover, each unit in the communication device 700 and the above-mentioned other operations and/or functions are respectively intended to implement a corresponding flow of the method in FIG. 6 .

It should also be understood that when the communication device 700 is a chip configured in (or used in) a communication device, the transceiver unit 720 in the communication device 700 may be an input/output interface or circuit of the chip, and the processing in the communication device 700 Unit 710 may be a processor in a chip.

It should be understood that the transceiver unit 720 in the communication device 700 can be implemented through a communication interface (such as a transceiver or an input/output interface), for example, it can correspond to the transceiver 810 in the terminal device 800 shown in FIG. 8 . The processing unit 710 in the communication apparatus 700 may be implemented by at least one processor, for example, may correspond to the processor 820 in the terminal device 800 shown in FIG. 8 . The processing unit 710 in the communication device 700 may also be implemented by at least one logic circuit. The storage unit 730 in the communication device 700 may correspond to the memory in the terminal device 800 shown in FIG. 8 .

It should be understood that when the communication device 700 is a network device, the transceiver unit 720 in the communication device 700 can be realized through a communication interface (such as a transceiver or an input/output interface), for example, it can correspond to the network device shown in FIG. 9 Transceiver 910 in 900. The processing unit 710 in the communication device 700 can be implemented by at least one processor, for example, it can correspond to the processor 920 in the network device 900 shown in FIG. circuit implementation.

FIG. 8 is a schematic structural diagram of a terminal device 800 provided in an embodiment of the present application. The terminal device 800 may be applied to the system shown in FIG. 1 to perform the functions of a terminal device or a communication device in the foregoing method embodiments. As shown in the figure, the terminal device 800 includes a processor 820 and a transceiver 810 . Optionally, the terminal device 800 further includes a memory. Wherein, the processor 820, the transceiver 810, and the memory may communicate with each other through an internal connection path, and transmit control and/or data signals. The memory is used to store computer programs, and the processor 820 is used to execute the computer programs in the memory to control the transceiver 810 to send and receive signals.

The processor 820 and the memory may be combined into a processing device, and the processor 820 is used to execute the program codes stored in the memory to realize the above functions. During specific implementation, the memory may also be integrated in the processor 820, or be independent of the processor 820. The processor 820 may correspond to the processing unit in FIG. 7 .

The above-mentioned transceiver 810 may correspond to the transceiver unit in FIG. 7 . The transceiver 810 may include a receiver (or called a receiver, a receiving circuit) and a transmitter (or called a transmitter, a transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the terminal device 800 shown in FIG. 8 can implement the process involving the terminal device in the method embodiment shown in FIG. 6 . The operations and/or functions of the various modules in the terminal device 800 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, reference may be made to the descriptions in the foregoing method embodiments, and detailed descriptions are appropriately omitted here to avoid repetition.

The above-mentioned processor 820 can be used to execute the actions implemented inside the terminal device described in the foregoing method embodiments, and the transceiver 810 can be used to execute the sending or receiving actions described in the foregoing method embodiments. For details, please refer to the description in the foregoing method embodiments, and details are not repeated here.

Optionally, the terminal device 800 may further include a power supply, configured to provide power to various devices or circuits in the terminal device.

In addition, in order to make the functions of the terminal equipment more perfect, the terminal equipment 800 may also include input and output devices, such as including one or more of an input unit, a display unit, an audio circuit, a camera, and a sensor. The circuitry may also include speakers, microphones, and the like.

FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of the present application. The network device 900 can be applied to the system shown in FIG. 1 to perform the functions of the communication device in the above method embodiment. As shown in FIG. 9 , the network device 900 includes a processor 920 and a transceiver 910 . Optionally, the network device 900 further includes a memory. Wherein, the processor 920, the transceiver 910, and the memory may communicate with each other through an internal connection path, and transmit control and/or data signals. The memory is used to store computer programs, and the processor 920 is used to execute the computer programs in the memory to control the transceiver 910 to send and receive signals.

The processor 920 and the memory may be combined into a processing device, and the processor 920 is configured to execute the program codes stored in the memory to realize the above functions. During specific implementation, the memory may also be integrated in the processor 820, or be independent of the processor 920. The processor 920 may correspond to the processing unit in FIG. 7 .

The above-mentioned transceiver 910 may correspond to the transceiver unit in FIG. 7 . The transceiver 910 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Among them, the receiver is used to receive signals, and the transmitter is used to transmit signals.

It should be understood that the network device 900 shown in FIG. 9 can implement various processes involving the communication device in the method embodiment shown in FIG. 6 . The operations and/or functions of the various modules in the network device 900 are respectively for implementing the corresponding processes in the foregoing method embodiments. For details, reference may be made to the descriptions in the foregoing method embodiments, and detailed descriptions are appropriately omitted here to avoid repetition.

The above-mentioned processor 920 may be used to execute the actions described in the foregoing method embodiments implemented within the communication device, and the transceiver 910 may be used to execute the actions of sending or receiving in the foregoing method embodiments. For details, please refer to the description in the foregoing method embodiments, and details are not repeated here.

The embodiment of the present application also provides a processing device, including a processor and a (communication) interface; the processor is configured to execute the method in any one of the above method embodiments.

It should be understood that the above processing device may be one or more chips. For example, the processing device may be a field programmable gate array (field programmable gate array, FPGA), an application specific integrated circuit (ASIC), or a system chip (system on chip, SoC). It can be a central processor unit (CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (micro controller unit) , MCU), can also be a programmable controller (programmable logic device, PLD) or other integrated chips.

According to the method provided in the embodiment of the present application, the present application also provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed by one or more processors, the The device executes the method in the embodiment shown in FIG. 6 .

The technical solutions provided by the embodiments of the present application may be fully or partially implemented by software, hardware, firmware or any combination thereof. When implemented using software, it 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. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general computer, a dedicated computer, a computer network, a network device, a terminal device, a core network device, a machine learning device or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, a digital video disc (digital video disc, DVD)), or a semiconductor medium.

According to the method provided in the embodiment of the present application, the present application also provides a computer-readable storage medium, the computer-readable storage medium stores program code, and when the program code is run by one or more processors, the processing includes the The apparatus of the controller executes the method in the embodiment shown in FIG. 6 .

According to the method provided in the embodiment of the present application, the present application further provides a system, which includes the foregoing multiple terminal devices. The system may further include the aforementioned one or more communication devices.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A method for transmitting a reference signal, comprising:

sending configuration information to the terminal device, where the configuration information is used to configure a plurality of initialization information groups of a reference signal, the reference signal is used for data channel demodulation, and one initialization information group in the plurality of initialization information groups includes at least one initialization information, where the initialization information is used to generate the reference signal;

Sending first indication information to the terminal device, where the first indication information is used to indicate a first initialization information group in the plurality of initialization information groups;

Sending a first reference signal to the terminal device, where initialization information of the first reference signal is first initialization information, and the first initialization information group includes the first initialization information.
The method according to claim 1, characterized in that,

The first indication information is carried in first control information, the first control information is used to schedule a first data channel, and the first reference signal is used to demodulate the first data channel; or,

The first indication information is carried in activation information, the activation information is used to activate the first initialization information group, and the activation information is a MAC control element CE or second control information.
The method according to claim 2, wherein the first indication information is carried in the first control information,

The first control information further includes second indication information, where the second indication information is used to indicate the first initialization information in the first initialization information group, or,

The first initialization information is predefined initialization information in the first initialization information group.
The method according to any one of claims 1 to 3, wherein the sending the first reference signal to the terminal device includes:

Send Q reference signals to multiple terminal devices on the first resource, where the Q reference signals include the first reference signal, and Q is an integer greater than 1, where the first resources carry mutually orthogonal reference signals The maximum number of signals is M, and M is a positive integer greater than 1,

If the Q is less than or equal to the M, the initialization information of the Q reference signals is the same;

If the Q is greater than the M, the Q reference signals include the same initialization information of the M reference signals.
The method according to claim 4, wherein the Q reference signals correspond to Q antenna ports, and one reference signal in the Q reference signals is sent by the corresponding antenna port.
The method according to claim 4 or 5, wherein the serving cell of the terminal device includes K initialization information groups, K is an integer greater than 1, and the K initialization information groups include the plurality of initialization information group, the maximum number of reference signals carried by the first resource is P, and the P is the product of the K and the M.
The method according to any one of claims 1 to 6, further comprising:

Generate the initialization information group according to the cell identification information and/or according to the group identification information of the initialization information group, where the cell identification information is the identification information of the serving cell of the terminal device, and the plurality of initialization information At least two initialization information groups in the group contain different initialization information.
A method for transmitting a reference signal, comprising:

receiving configuration information from a network device, the configuration information is used to configure a plurality of initialization information groups of a reference signal, the reference signal is used for data channel demodulation, and one initialization information group in the plurality of initialization information groups includes at least an initialization information, the initialization information is used to generate the reference signal;

receiving first indication information from the network device, where the first indication information is used to indicate first initialization information in the plurality of initialization information groups;

A first reference signal from the network device is received, initialization information of the first reference signal is first initialization information, and the first initialization information belongs to the first initialization information group.
The method according to claim 8, characterized in that,

The first indication information is carried in first control information, the first control information is used to schedule a first data channel, and the first reference signal is used to demodulate the first data channel; or,

The first indication information is carried in activation information, and the activation information is used to activate the first initialization information group in the multiple initialization information groups, and the activation information is a medium access control MAC control element CE or a second control information.
The method according to claim 9, wherein the first indication information is carried in the first control information,

The first control information further includes second indication information, where the second indication information is used to indicate the first initialization information in the first initialization information group, or,

The first initialization information is predefined initialization information in the first initialization information group.
A reference signal transmission device, characterized in that it comprises:

A processing unit, configured to determine a plurality of initialization information groups of a reference signal, one initialization information group in the plurality of initialization information groups includes at least one initialization information, the initialization information is used to generate the reference signal, and the reference signal For data channel demodulation;

a transceiver unit, configured to send configuration information to the terminal device, where the configuration information is used to configure the multiple initialization information groups;

The transceiving unit is further configured to send first indication information to the terminal device, where the first indication information is used to indicate a first initialization information group in the plurality of initialization information groups;

The transceiver unit is further configured to send a first reference signal to the terminal device, the initialization information of the first reference signal is first initialization information, and the first initialization information group includes the first initialization information.
The device according to claim 11, characterized in that,

The first indication information is carried in first control information, the first control information is used to schedule a first data channel, and the first reference signal is used to demodulate the first data channel; or,

The first indication information is carried in activation information, the activation information is used to activate the first initialization information group, and the activation information is a MAC control element CE or second control information.
The device according to claim 12, wherein the first indication information is carried in the first control information,

The first control information further includes second indication information, where the second indication information is used to indicate the first initialization information in the first initialization information group, or,

The first initialization information is predefined initialization information in the first initialization information group.
Apparatus according to any one of claims 11 to 13, characterized in that

The transceiver unit is specifically configured to send Q reference signals to multiple terminal devices on the first resource, where the Q reference signals include the first reference signal, and Q is an integer greater than 1, wherein the first The maximum number of mutually orthogonal reference signals carried by one resource is M, where M is a positive integer greater than 1,

If the Q is less than or equal to the M, the initialization information of the Q reference signals is the same;

If the Q is greater than the M, the Q reference signals include the same initialization information of the M reference signals.
The device according to claim 14, wherein the Q reference signals correspond to Q antenna ports, and one reference signal in the Q reference signals is sent by the corresponding antenna port.
The apparatus according to claim 14 or 15, wherein the serving cell of the terminal device includes K initialization information groups, K is an integer greater than 1, and the K initialization information groups include the plurality of initialization information group, the maximum number of reference signals carried by the first resource is P, and the P is the product of the K and the M.
Apparatus according to any one of claims 11 to 16, characterized in that

The processing unit is specifically configured to generate the initialization information group according to cell identification information and/or group identification information of the initialization information group, wherein the cell identification information is identification information of a serving cell of the terminal device , at least two initialization information groups in the plurality of initialization information groups contain different initialization information.
A reference signal transmission device, characterized in that it comprises:

A transceiver unit, configured to receive configuration information from a network device, the configuration information is used to configure a plurality of initialization information groups of a reference signal, the reference signal is used for data channel demodulation, and one of the plurality of initialization information groups The initialization information group includes at least one initialization information, and the initialization information is used to generate the reference signal;

The transceiving unit is further configured to receive first indication information from the network device, where the first indication information is used to indicate the first initialization information in the plurality of initialization information groups;

The transceiver unit is further configured to receive a first reference signal from the network device;

A processing unit, configured to determine that the initialization information of the first reference signal is first initialization information, where the first initialization information belongs to the first initialization information group.
The device according to claim 18, characterized in that,

The first indication information is carried in first control information, the first control information is used to schedule a first data channel, and the first reference signal is used to demodulate the first data channel; or,

The first indication information is carried in activation information, and the activation information is used to activate the first initialization information group in the multiple initialization information groups, and the activation information is a medium access control MAC control element CE or a second control information.
The device according to claim 19, wherein the first indication information is carried in the first control information,

The first control information further includes second indication information, where the second indication information is used to indicate the first initialization information in the first initialization information group, or,

The first initialization information is predefined initialization information in the first initialization information group.
A communication device, characterized by comprising at least one processor coupled to a memory;

The memory is used to store programs or instructions;

The at least one processor is configured to execute the program or instructions, so that the device implements the method according to any one of claims 1-10.
A chip, characterized in that it includes at least one processor and a communication interface;

The communication interface is used to receive a signal input into the chip or a signal output from the chip, and the processor communicates with the communication interface and implements any one of claims 1 to 10 through a logic circuit or executing code instructions. method described in the item.
A computer-readable storage medium, characterized in that instructions are stored therein, and when the instructions are run on a computer, the computer is made to execute the method according to any one of claims 1 to 10.
A computer program product, characterized by comprising instructions, which, when run on a computer, cause the computer to execute the method according to any one of claims 1 to 10.