CN115913494A - Transmission method of reference signal and communication device - Google Patents

Abstract

The application provides a transmission method of a reference signal and a communication device. The method comprises the following steps: the method comprises the steps that network equipment sends configuration information to terminal equipment, the configuration information is used for configuring a plurality of initialization information groups of a reference signal, the reference signal is used for data channel demodulation, one initialization information group in the plurality of initialization information groups comprises at least one piece of initialization information, and the initialization information is used for generating the reference signal; the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating the first initialization information group in the plurality of initialization information groups; the network device sends a first reference signal to the terminal device, wherein initialization information of the first reference signal is first initialization information, and the first initialization information belongs to the first initialization information group. The flexibility of reference signal transmission can be improved, so that the throughput of data transmission is improved.

Description

Transmission method and communication device of reference signal

Technical Field

The present application relates to the field of communications, and in particular, to a transmission method of a reference signal and a communication apparatus.

Background

In wireless communicationIn systems in which data demodulation is achieved by channel estimation using reference signals, e.g. fourth generation (4) ^th generation, 4G) mobile communication system, fifth generation (5) ^th generation, 5G) demodulation reference signal (DMRS) in a mobile communication system is used for demodulation of a data channel.

In a Multiple Input Multiple Output (MIMO) transmission scheme, a plurality of data streams can be demodulated by transmitting a plurality of reference signals that are orthogonal to each other and correspond to the plurality of data streams. The plurality of mutually orthogonal reference signals may be orthogonal in time domain resources, orthogonal in frequency resources, or orthogonal in code domain resources. The number of data streams that can be transmitted simultaneously is limited by the number of orthogonal resources of the reference signal. Therefore, the throughput of data transmission is limited by the transmission method of the reference signal.

Disclosure of Invention

The application provides a transmission method and a communication device of a reference signal, 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, which may be performed by a network device or a module (e.g., a chip) configured in (or used for) the network device.

The method comprises the following steps: transmitting configuration information to a terminal device, the configuration information being used for configuring a plurality of initialization information sets of a reference signal, the reference signal being used for data channel demodulation, one of the plurality of initialization information sets including at least one initialization information, the initialization information being used for generating the reference signal; sending first indication information to the terminal equipment, wherein the first indication information is used for indicating a first initialization information group in the plurality of initialization information groups; and sending a first reference signal to the terminal device, wherein the initialization information of the first reference signal is first initialization information, and the first initialization information group comprises the first initialization information.

According to the above scheme, the network device may 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 sets, so as to achieve flexible transmission of the demodulation reference signal, the network device may indicate, based on a required throughput, that different terminal devices reference signals use the same or different initialization information within one Transmission Time Interval (TTI), and increase the number of data streams under the condition that the demodulation reference signal resources are limited. The flexibility of data scheduling of the network equipment is increased, and the data transmission throughput can be improved.

With reference to the first aspect, in certain implementations of the first aspect, the first indication information is carried in first control information, the first control information is used for scheduling a first data channel, and the first reference signal is used for demodulating the first data channel.

According to the above scheme, the network device may indicate the initialization information group to which the initialization information of the reference signal belongs through the control information for scheduling the data channel, so that the network device and the terminal device agree on the initialization information group of the initialization information of the reference signal corresponding to the data channel.

With reference to the first aspect, in certain implementations of the first aspect, the first indication information is carried in activation information, where the activation information is used to activate the first initialization information group, and the activation information is a medium access control MAC control element CE or second control information.

According to the above scheme, the network device may activate one of the plurality of initialization information sets by the activation information, and the network device and the terminal device generate the reference signal using the initialization information in the activated initialization information set. So that the network device and the terminal device agree on the initialization information group (i.e. the activated initialization information group) to which the initialization information of the reference signal corresponding to the data channel belongs. And the situation that the indication field indication initialization information group is added in the control information of the scheduling data channel can be avoided.

With reference to the first aspect, in certain implementations 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, 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.

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 scheme, the network device may indicate the initialization information of the reference signal through the control information of the scheduled data channel, or the initialization information of the reference signal may be predefined initialization information in an activated initialization information group. So that the network device and the terminal device can agree on the initialization information of the reference signal.

With reference to the first aspect, in some implementations of the first aspect, the sending the first reference signal to the terminal device includes: transmitting Q reference signals to a plurality of terminal devices on a first resource, wherein the Q reference signals comprise the first reference signal, Q is an integer greater than 1, the maximum number of the mutually orthogonal reference signals carried by the first resource is M, M is a positive integer greater than 1, and if Q is less than or equal to M, the initialization information of the Q reference signals is the same; if the Q is larger than the M, the initialization information of the M reference signals included in the Q reference signals is the same.

That is to say, when the network device sends multiple reference signals to multiple terminal devices, the orthogonal M reference signal resources are preferentially used to carry the reference signals, and the initialization information of the M reference signals carried on the M reference signal resources is the same. When the M orthogonal reference signal resources are all used, different initialization information is indicated, and reference signals with different initialization information are borne on the same reference signal resource. The terminal equipment can distinguish the M reference signals, so that the demodulation of the data stream corresponding to the reference signals is realized.

With reference to the first aspect, in certain implementations of the first aspect, the Q reference signals correspond to Q antenna ports, and one of the Q reference signals is transmitted by the corresponding antenna port.

With reference to the first aspect, in certain implementation manners of the first aspect, the serving cell of the terminal device includes K initialization information sets, where K is an integer greater than 1, the K initialization information sets include the initialization information sets, a maximum number of the first resource-bearing reference signals is P, and P is a product of K and M.

According to the scheme, the plurality of initialization information groups are configured, so that the transmission of the DMRS is not limited by the number of orthogonal resources, the resource utilization rate of the DMRS transmission resources can be improved, and the flexible transmission of the DMRS is realized. A corresponding mechanism is also needed in the system to support flexible DMRS transmission between the network device and the terminal device.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and generating 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, and 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, which may be performed by a terminal device or a module (e.g., a chip) configured (or used) in the terminal device.

The method comprises the following steps: receiving configuration information from a network device, wherein the configuration information is used for configuring 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 comprises at least one piece of initialization information used for generating the reference signal; receiving first indication information from the network device, wherein the first indication information is used for indicating first initialization information in the plurality of initialization information groups; receiving a first reference signal from the network device, where 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, 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, where the activation information is used to activate a first initialization information group in the plurality of initialization information groups, and the activation information is a MAC control element CE or second control information.

With reference to the second aspect, in certain implementations 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, 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.

In a third aspect, a communication apparatus is provided, the apparatus comprising: a processing unit, configured to determine a plurality of initialization information sets of a reference signal, wherein one of the initialization information sets includes at least one piece of initialization information, the initialization information is used to generate the reference signal, and the reference signal is used for data channel demodulation; a transceiving unit, configured to send configuration information to the terminal device, where the configuration information is used to configure the plurality of initialization information groups; the transceiver 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, where 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 certain implementations of the third aspect, 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, where 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.

With reference to the third aspect, in certain implementations 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, 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.

With reference to the third aspect, in certain implementations of the third aspect, the transceiver unit is specifically configured to send Q reference signals to multiple terminal devices on a first resource, where the Q reference signals include the first reference signal, Q is an integer greater than 1, where a maximum number of the reference signals that are orthogonal to each other is M carried by the first resource, M is a positive integer greater than 1, and if Q is less than or equal to M, initialization information of the Q reference signals is the same; if Q is larger than M, the initialization information of M reference signals in Q reference signals is the same.

With reference to the third aspect, in some implementations of the third aspect, the Q reference signals correspond to Q antenna ports, and one of the Q reference signals is transmitted 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, where K is an integer greater than 1, the K initialization information groups include the initialization information groups, the maximum number of the first resource-bearing reference signals is P, and P is a product of K and M.

With reference to the third aspect, in certain 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, where at least two initialization information groups in the plurality of initialization information groups include different initialization information.

In a fourth aspect, there is provided a communication apparatus, the apparatus comprising: a transceiver unit, configured to receive configuration information from a network device, where the configuration information is used to configure multiple initialization information groups of a reference signal, the reference signal is used for data channel demodulation, and an initialization information group in the multiple initialization information groups includes at least one piece of initialization information, and the initialization information is used to generate the reference signal; the transceiver unit is further configured to receive 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; the transceiver unit is further configured to receive a first reference signal from the network device; a processing unit, configured to determine that initialization information of the first reference signal is first initialization information, where the first initialization information belongs to the first initialization information group.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first indication information is carried in first control information, the first control information is used for scheduling a first data channel, and the first reference signal is used for demodulating the first data channel; or, the first indication information is carried in activation information, where the activation information is used to activate a first initialization information group in the plurality of initialization information groups, and the activation information is a media access control MAC control element CE or second control information.

With reference to the fourth aspect, in certain implementations 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, 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.

In a fifth aspect, a communications apparatus is provided that includes a processor. The processor may implement the method of the first aspect as well as any one of the possible implementations of the first aspect.

Optionally, the communication device further includes a memory, and the processor is coupled to the memory and configured to execute instructions in the memory to implement the method in any one of the possible implementations of the first aspect and the first aspect.

Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface. In the 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 one implementation, 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, the communication device is a chip configured in the 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.

Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

In a sixth aspect, a communications apparatus is provided that includes a processor. The processor may implement the method of the second aspect described above and any one of the possible implementations of the second aspect.

Optionally, the communication device further comprises a memory, and the processor is coupled to the memory and configured to execute the instructions in the memory to implement the method of any one of the possible implementations of the second aspect and the second aspect.

Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface. In the 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 one implementation, the communication device is a terminal device. When the communication device is a terminal equipment, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the 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.

Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

In a seventh aspect, a processor is provided, including: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the method of any one of the possible implementations of the first aspect and the first aspect, or performs the method of any one of the possible implementations of the second aspect and the second aspect.

In a specific implementation process, the 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, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions) capable, when executed, of performing the method of the first aspect and any one of the possible implementations of the first aspect, or of performing the method of the second aspect and any one of the possible implementations of the second aspect.

In a ninth aspect, a computer-readable storage medium is provided, which stores a computer program (which may also be referred to as code, or instructions) that, when executed on a computer, is capable of implementing the method of the first aspect and any one of the possible implementations of the first aspect, or of performing the method of the second aspect and any one of the possible implementations of the second aspect.

A tenth aspect provides a communication system comprising at least one communication apparatus as provided in any one of the possible implementations of the first aspect and at least one communication apparatus as provided in any one of the possible implementations of the second aspect and the second aspect.

Drawings

FIG. 1 is a schematic diagram of a communication system suitable for use with embodiments of the present application;

fig. 2 is a schematic diagram of a DMRS configuration type 1 provided in an embodiment of the present application;

fig. 3 is another schematic diagram of DMRS configuration type 1 provided in an embodiment of the present application;

fig. 4 is a schematic diagram of DMRS configuration type 2 provided in an embodiment of the present application;

fig. 5 is another schematic diagram of DMRS configuration type 2 provided in an embodiment of the present application;

fig. 6 is a schematic flowchart of a method for transmitting a reference signal according to an embodiment of the present application;

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

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

fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

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

In order to make the objects, 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 with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The terms "first," "second," and the like in the description and in the claims, and in the foregoing drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be implemented in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a universal microwave access interoperability (WiMAX) communication system, a fifth generation (5 th generation,5 g) system or a New Radio (NR) and future communication systems, such as a sixth generation mobile communication system. This is not a limitation of the present application.

Fig. 1 is a schematic block diagram of a communication system suitable for use in the present 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 further comprise at least one terminal device, such as terminal devices 102 to 107 in fig. 1. The terminal devices 102 to 107 may be mobile or stationary. Network device 101 and one or more of terminal devices 102-107 may each communicate over a wireless link. The network device and the terminal device can communicate by adopting the wireless communication method provided by the embodiment of the application.

A terminal device in the embodiments of the present application may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation security, a wireless terminal in a smart city, a wireless terminal in a smart home, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a wireless communication function, a computing device, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a PLMN terminal device in a Public Land Mobile Network (PLMN) in the future. It should be understood that the present application is not limited to the particular form of the terminal device.

The network device in the embodiment of the present application may be a device having a wireless transceiving function in an access network. Such devices include, but are not limited to: a base station, an evolved node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved node B or home node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a Transmission Point (TP), or a Transmission and Reception Point (TRP), etc. The device may also be a network node forming a gNB or a transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU), etc. It should be understood that the present application is not limited to the particular form of network device.

The following description is provided for the related art and terminology related to the embodiments of the present application.

A sequence of demodulation reference signals (DMRSs) may be generated based on the following equation:

where c (i) is a pseudo-random sequence, and an initialization sequence of the pseudo-random sequence may be shown as follows:

wherein l is the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time slot,

for the numbering of the slots in a radio frame, it should be noted that one radio frame includes a plurality of slots, and one slot includes a plurality of OFDM symbols.

For an initialization sequence c _init The initialization wrap-around of (1). Wherein +>

Related to a Code Division Multiplex (CDM) group λ in which DMRS is located as described below. Optionally, a device>

Can identify information for a cell

I.e. based on>

DMRSs may be mapped on one or two OFDM symbols in one slot, and DMRSs may be mapped on physical resources based on DMRS configuration type (configuration type) 1 and configuration type 2.

Fig. 2 is a schematic diagram of a DMRS configuration type 1 of one OFDM symbol, where one OFDM symbol in a time domain and one subcarrier in a frequency domain form one Resource Element (RE), and fig. 2 shows 12 REs, that is, RE 0 to RE 11, in one OFDM symbol. For DMRS configuration type 1, on one OFDM symbol, every other RE set of one RE may map DMRSs corresponding to two antenna ports, for example, DMRS REs corresponding to RE 0, 2, 4, 8, 10, and 12, which are antenna port 0 (i.e., a port with p =1000 in table 1) and antenna port 1 (i.e., a port with p =1001 in table 1, and similar details are not repeated below). That is, DMRSs transmitted by antenna ports 0 and 1 may be mapped on REs 0, 2, 4, 6, 8, and 10. RE 0, 2, 4, 8, 10, 12 belong to one CDM group, such as CDM group 0 (i.e. λ =0 in table 1), and reference signals transmitted by antenna port 0 and antenna port 1 are orthogonal by spreading codes. RE 1, 3, 5, 7, 9, 11 are DMRS REs corresponding to antenna port 2 and antenna port 3. RE 1, 3, 5, 7, 9, 11 belong to one CDM group, such as CDM group 1 (i.e. λ =1 in table 1), and reference signals transmitted by antenna ports 2 and 3 are orthogonal by spreading codes. It can be seen that, DMRS configuration type 1 of one OFDM symbol can map 4 orthogonal DMRSs at most, and one or more of time-domain resources, frequency-domain resources, or spreading codes of the 4 DMRSs are orthogonal to each other.

Fig. 3 is a schematic diagram of DMRS configuration type 1 of two OFDM symbols, and for DMRS configuration type 1, DMRSs corresponding to four antenna ports may be mapped to RE sets on two OFDM symbols every other RE, for example, RE 0, 2, 4, 6, 8, and 10 on the two OFDM symbols are DMRS REs corresponding to antenna ports 0, 1, 4, and 5, and belong to CDM group 0 (i.e., λ =0 in table 1). RE 1, 3, 5, 7, 9, 11 on two symbols are DMRS REs corresponding to antenna ports 2, 3, 6, 7, and belong to CDM group 1 (i.e., λ =1 in table 1). Therefore, DMRS configuration type 1 of two OFDM symbols may map 8 mutually orthogonal DMRSs at most, where one or more of time-domain resources, frequency-domain resources, or spreading codes of the 8 DMRSs are mutually orthogonal.

Fig. 4 is a diagram illustrating a DMRS configuration type 2 for one OFDM symbol. For DMRS configuration type 2, on one OFDM symbol, REs 0, 1, 6, and 7 are DMRS REs corresponding to antenna port 0 and antenna port 1, and belong to CDM group 0 (i.e., λ =0 in table 2). REs 2, 3, 8, and 9 are DMRS REs corresponding to antenna port 2 and antenna port 3, and belong to CDM group 1 (i.e., λ =1 in table 2). REs 4, 5, 10, 11 are DMRS REs corresponding to antenna port 4 and antenna port 5, and belong to CDM group 2 (i.e., λ =2 in table 2). Therefore, the DMRS configuration type 2 of one OFDM symbol may map, at most, 6 mutually orthogonal DMRSs, one or more of time-domain resources, frequency-domain resources, or spreading codes of the 6 DMRSs being mutually orthogonal.

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

Fig. 5 is a diagram of a DMRS configuration type 2 for one OFDM symbol. For DMRS configuration type 2, REs 0, 1, 6, 7 on two OFDM symbols are DMRS REs corresponding to antenna ports 0, 1, 6, 7, and belong to CDM group 0 (i.e., λ =0 in table 2). REs 2, 3, 8, 9 on two symbols are DMRS REs corresponding to antenna ports 2, 3, 8, 9, and belong to CDM group 1 (i.e., λ =1 in table 2). REs 4, 5, 10, 11 on two symbols are DMRS REs corresponding to antenna ports 4, 5, 10, 11, and belong to CDM group 2 (i.e., λ =2 in table 2). Therefore, the DMRS configuration type 2 of two OFDM symbols may map at most 12 mutually orthogonal DMRSs, one or more of time-domain resources, frequency-domain resources, or spreading codes of the 12 DMRSs being mutually orthogonal.

In RE (k, l) _p，μ Mapped DMRS symbols

Can be obtained according to the following formula, wherein RE (k, l) _p，μ Is the RE of the k subcarrier position on the l OFDM symbol in one slot.

k′＝0，1；

n＝0，1，…

Wherein the spreading code w _f (k′)、w _t (l'), Δ can be obtained from Table 1 or Table 2.

Is a power control factor.

Table 1 PDSCH DMRS configuration type 1 parameters

Table 2 PDSCH DMRS configuration type 2 parameters

In summary, the DMRSs transmitted by the antenna ports may be orthogonal by one or more of time-domain resource orthogonality (e.g., mapping on different OFDM symbols), frequency-domain resource orthogonality (e.g., mapping on different subcarriers), or code-domain resource orthogonality (e.g., using mutually orthogonal spreading codes), so that the receiving end may demodulate multiple data streams based on the DMRSs. It follows that the number of simultaneously transmitted data streams is limited by the number of orthogonal resources of the reference signal. For example, DMRS configuration type 1 of 2 OFDM symbols supports transmission of at most 8 orthogonal DMRSs, where the 8 orthogonal DMRSs correspond to 8 antenna ports, and the network device can transmit at most 8 data streams through the 8 antenna ports, so that the terminal device can demodulate the 8 data streams based on the 8 orthogonal DMRSs, respectively. For another example, DMRS configuration type 2 of 2 OFDM symbols supports transmission of at most 12 orthogonal DMRSs, where the 12 orthogonal DMRSs correspond to 12 antenna ports, and the network device can transmit at most 12 data streams through the 12 antenna ports, so that the terminal device can demodulate the 12 data streams based on the 12 orthogonal DMRSs.

Based on the transmission mode, the number of the DMRS can be increased by increasing the number of the OFDM symbols for transmitting the DMRS, so that the number of the data streams can be increased.

Consider ifThe DMRSs mapped on the same DMRS transmission resource have different sequences, and the receiving end can distinguish different DMRSs on the same DMRS transmission resource according to the DMRS sequence, and thus, the initialization sequence c can be changed _init To generate different DMRS sequences r (n). The DMRS with different sequences are mapped on the same DMRS transmission resource, so that a receiving end can distinguish different DMRS sequences on the DMRS resource to realize the demodulation of corresponding data streams. The same DMRS transmission resource refers to a DMRS resource in which a time domain resource (e.g., an OFDM symbol), a frequency domain resource (a subcarrier), and a spreading code are the same.

The network device may configure one or both initialization wraps via Radio Resource Control (RRC) messages, e.g.

(i.e. [ means for ] A>

) And & ->

(i.e. is->

) Wherein, in the step (A),

when the RRC message configures two initialization wraps, a Downlink Control Information (DCI) of a Physical Downlink Shared Channel (PDSCH) may include a DMRS initialization information indication field for indicating an initialization wrap used by a DMRS.

As can be seen from the above description, for DMRSs with the same initialization sequence, DMRS configuration type 1 and DMRS configuration type 2 may respectively map 8 orthogonal DMRSs and 12 orthogonal DMRSs on 2 OFDM symbols through time division, frequency division, code division, and the like, and for two DMRS sequences with different initialization sequences, different DMRSs may be mapped on the same DMRS transmission resource. The DMRS configuration type 1 and the configuration type 2 may map 16 DMRSs and 24 DMRSs on 2 OFDM symbols, respectively.

With the development of large-scale mass communication, higher requirements are put forward on data transmission throughput, and a DMRS transmission mode becomes a key for improving the data throughput. The increase of the number of the DMRS sequences can realize the increase of the number of data transmission streams under the condition of not increasing DMRS transmission resources, so that the transmission of the DMRS is not limited by the number of orthogonal resources, the resource utilization rate of the DMRS transmission resources can be improved, and the flexible transmission of the DMRS is realized. A corresponding mechanism is also needed in the system to support flexible DMRS transmission between the network device and the terminal device.

The following describes a method for transmitting a reference signal according to an embodiment of the present application with reference to the accompanying drawings.

Fig. 6 is a schematic flowchart of a method 600 for transmitting a reference signal according to 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 of the plurality of initialization information groups includes at least one initialization information. The initialization information is used to generate a reference signal for data channel demodulation.

For example, the reference signal may be a DMRS, and the initialization information may be an initialization scrambling code used to generate an initialization sequence for the DMRS

But the application is not limited thereto.

Accordingly, the terminal device receives the configuration information from the network device and determines a plurality of initialization information sets 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 a plurality of 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 comprise different initialization information.

For example, a generation function of the initialization information set may be predefined, and parameters of the generation function may include cell identification information. And the network equipment generates K initialization information groups of the cell according to the generating function and the cell identification information of the cell, wherein the K initialization information groups comprise different initialization information.

For another example, the K initialization information sets may be generated according to the set identification information of the initialization information sets, for example, one initialization information set includes 2 initialization information, which is denoted as

If the group identification information is a group number, the first group

Is 1, is greater than or equal to>

Second group->

Is 2, the group identification information of (2),

the other groups are generated in a similar manner, namely ten bits of the initialization information are group identification information, and one bit is identification information of the initialization information in the group.

For another example, the K initialization information groups may 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, which is recorded as

The group identification information is a group number and a cell identificationInformation is->

Then the first group->

Is 1, the group identification information of (1),

second group->

Is 2, is greater than or equal to>

The other groups are generated in a similar manner, that is, the low-order number 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-order number of the initialization information is the cell identification information.

Alternatively, the network device may make the initialization information set different between adjacent cells when generating the initialization information of each cell. Mutual interference between reference signals of neighboring cells can be reduced.

By way of example and not limitation, the configuration information is an RRC message.

Alternatively, the network device may send the configuration information to the terminal device after the terminal device enters an RRC connected (RRC _ connected) state.

For example, after the terminal device transitions from an RRC IDLE (RRC _ IDLE) state to an RRC connected state, or after the terminal device transitions from an RRC INACTIVE (RRC _ INACTIVE) state to an RRC connected state, the network device sends the configuration information to the terminal device to notify the terminal device of the initialization information set of the reference signal that can be used.

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 plurality of initialization information groups.

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

In one embodiment, the first indication information is carried in first control information, and the first control information is used for scheduling a first data channel.

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

In another embodiment, the first indication information is carried in activation information, and the activation information is used for activating the first initialization information group. The activation information is a radio access control (MAC) Control Element (CE), or the activation information is second control information.

For example, the network device may notify the terminal device of activation information by which the first initialization information in the plurality of initialization information groups is activated. And generating a demodulation reference signal transmitted to the terminal device by using the initialization information in the activated first initialization information group within a period of time. Wherein the period of time may be a preset time period. Alternatively, the network device and the terminal device may generate the demodulation reference signal using the initialization information in the first initialization information group before receiving the next activation information. Still alternatively, the network device and the terminal device may generate the demodulation reference signal by using the initialization information in the first initialization information group before receiving the deactivation information for deactivating the first initialization information group. But the 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.

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

Before the network device sends the first reference signal to the terminal device, first control information for scheduling the first data channel is sent to the terminal device. 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 one embodiment, the first control information further includes second indication information indicating the first initialization information in the first initialization information group.

That is, the network device may indicate the use 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 using the demodulation reference signal of the first data channel. So that the network device and the terminal device agree on the initialization information of the first reference signal.

In another embodiment, 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 initialization information predefined in the first initialization information group, that is, the first initialization information.

For example, the protocol may specify 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 may agree on predefined initialization information, and generate a demodulation reference signal based on the predefined initialization information.

According to the above scheme, the network device may 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 sets, so as to achieve flexible transmission of the demodulation reference signal, the network device may indicate, based on a required throughput, that different terminal devices reference signals use the same or different initialization information within one Transmission Time Interval (TTI), and increase the number of data streams under the condition that the demodulation reference signal resources are limited.

For example, the network device determines that 36 data streams need to be transmitted to multiple terminal devices based on the required throughput, e.g., 2 OFDM with configuration type 2 for demodulation reference signals, and 36 demodulation reference signals need to be sent on 24 orthogonal reference signal resources on the 2 OFDM symbols. The network device may implement data demodulation of 36 data streams by indicating initialization information of the reference signals to the plurality of terminal devices, so that in a reference signal resource carrying (or referred to as mapping) a plurality of reference signals in the 24 orthogonal reference signal resources, the initialization information of the plurality of reference signal resources is different, so that the terminal devices distinguish different reference signals on the same reference signal resource, and successfully receive the corresponding reference signals. The reference signal resource refers to a reference signal resource with the same time domain position, frequency domain position and spreading code used in the code domain. E.g., reference signal resources corresponding to one spreading code in one CDM group. According to the scheme provided by the embodiment of the application, under the condition that the reference signal transmission resource is not increased and the maximum number of orthogonal DMRSs which can be transmitted on the reference signal transmission resource is ensured, a plurality of reference signals of different sequences can be transmitted on the same reference signal transmission resource, the number of the reference signals which can be transmitted on the reference signal transmission resource is increased, and the resource utilization rate of the reference signal transmission resource is improved. The method reduces the limitation of reference signal transmission resources on data throughput, realizes flexible transmission of reference signals, further increases the flexibility of data scheduling of network equipment, and can improve the data transmission throughput.

Optionally, the sending, by the network device, the first reference signal to the terminal device includes: the network device sends Q reference signals to a plurality of terminal devices on a first resource, wherein the Q reference signals comprise the first reference signal, Q is an integer greater than 1, the maximum number of the mutually orthogonal reference signals carried by the first resource is M, M is a positive integer greater than 1,

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

if Q is larger than M, the Q reference signals comprise M reference signals with the same initialization information.

That is to say, the first resource includes M orthogonal reference signal resources capable of carrying M reference signals orthogonal to each other, when the network device sends multiple reference signals to multiple terminal devices, the network device preferentially uses the M orthogonal reference signal resources to carry the reference signals, and the initialization information of the M reference signals carried on the M reference signal resources is the same. When the M orthogonal reference signal resources are all used, different initialization information is indicated, and reference signals with different initialization information are borne on the same reference signal resource. That is, the first resource carries at most M reference signals having 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 are different. The terminal equipment can distinguish the M reference signals, so that the demodulation of the data stream corresponding to the reference signals is realized.

Optionally, if Q is greater than M, the Q reference signals include a plurality of 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 orthogonal to each other. The initialization information of the reference signals in each two reference signal groups of the plurality of reference signal groups is different.

The Q reference signals may include H sets of reference signals, wherein,

the H reference signal groups at least include H-1 reference signal groups including M reference signals, the initialization information of the M reference signals in the same reference signal group is the same and is respectively mapped on the M reference signal resources in the first resource, the H reference signal groups include one reference signal group including Q-M- (H-1) reference signals, the initialization information of the Q-M- (H-1) reference signals is the same and is respectively mapped on Q-M- (H-1) reference signal resources in the M reference signal resources. This allows multiple reference signals that can be mapped on one reference signal resource to belong to different reference signal groups, differentThe initialization information of the reference signals in the reference signal group is different.

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

This is not a limitation of the present application. The first resource may be an OFDM symbol resource for transmission of a demodulation reference signal within one TTI. For example, the TTI is a time slot, if one OFDM symbol in one time slot is used for transmitting a demodulation reference signal, the one OFDM symbol is a first resource, and if two OFDM symbols in one time slot are used for transmitting a demodulation reference signal, the two OFDM symbols are a first resource. The TTI may 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 the first resource carrying reference signals is P, which is the product of K and M.

That is, if the first resource includes M orthogonal reference signal resources and can carry M orthogonal reference signals at most, the number of reference signals that the network device can transmit in the first resource is determined by M and the initialization information group K included in the cell, that is, P = K · M reference signals can be carried on the first resource. Wherein one of the M reference signal resources can carry K reference signals at most.

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

In a specific implementation, if initialization information sets configured by different terminal devices in a cell may not be completely the same, so that the reference signals transmitted in one TTI cannot guarantee that the reference signals all use the same initialization information when the number of the reference signals is less than M. For example, the network device sends R reference signals to the multiple terminal devices, where the R reference signals include L reference signals with the same initialization information, and L < R and L < M, the network device may preferentially map the reference signals with the same initialization information in the same CDM group, and the spreading codes used by the reference signals with the same initialization information mapped in the same CDM group are different, thereby implementing mutual orthogonality.

For example, the network device transmits 7 reference signals, such as reference signal 1 to reference signal 7, to the plurality of terminal devices. Among the 5 reference signals, the initialization information of reference signal 1, reference signal 2 and reference signal 3 is the same, and the initialization information of reference signal 4 and reference signal 5 is the same. If 1 OFDM symbol in one TTI uses configuration type 2 to carry demodulation reference signals, 1 OFDM symbol includes 6 orthogonal reference signal resources. The network device may map reference signals with the same initialization information to the same CDM group preferentially, e.g., 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 equipment maps the reference signals 4 and 5 into the CDM group 1, and the spreading codes of the reference signals 4 and 5 are different. Reference signals 3 and 6 are then mapped to CDM group 2, optionally the spreading codes for reference signals 3 and 6 may be the same or different. When 6 orthogonal reference signal resources are all used, the reference signal 7 is mapped in one CDM group, the initialization information of the reference signal 7 is different from that of other reference signals carried by the CDM group to which the reference signal 7 is mapped, and the terminal device can distinguish the reference signals in the CDM group.

According to the scheme, the network device can configure multiple groups of initialization information for the terminal device, flexible transmission of the demodulation reference signal can be achieved by indicating the demodulation reference signal informing the terminal device of the scheduled data channel to use one initialization information in one initialization information group, the network device can indicate different terminal device reference signals to use the same or different initialization information in one TTI based on required throughput, and the number of data streams is increased under the condition that the demodulation reference signal resource is limited. Under the condition that reference signal transmission resources are not increased and the maximum number of orthogonal DMRSs which can be transmitted on the reference signal transmission resources is ensured, a plurality of reference signals of different sequences can be transmitted on the same reference signal transmission resources, so that the number of the reference signals which can be transmitted on the reference signal transmission resources is increased, and the resource utilization rate of the reference signal transmission resources is improved. The limitation of reference signal transmission resources on data throughput is reduced, the reference signals are flexibly transmitted, the flexibility of data scheduling of network equipment is improved, and therefore the data transmission throughput can be improved.

The method provided by the embodiment of the present application is described in detail above with reference to fig. 2 to 6. Hereinafter, a communication apparatus and a communication device provided in an embodiment of the present application are described in detail with reference to fig. 7 to 9. In order to implement the functions in the method provided by the embodiments of the present application, each network element may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether any of the above functions is implemented as a hardware structure, a software module, or a combination of a hardware structure and a software module depends upon the particular application and design constraints imposed on the technical solution.

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

In one possible design, the communication apparatus 700 may correspond to the terminal apparatus in the above method embodiment, and the communication apparatus 700 may be a terminal device or an apparatus configured to 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 embodiment of the present application, and the communication device 700 may include a unit for executing the method executed by the terminal device in the method in fig. 6. Also, the units and other operations and/or functions described above in the communication apparatus 700 are respectively for realizing the 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 apparatus 700 is a chip configured in (or used in) a terminal device, the transceiver unit 720 in the communication apparatus 700 may be an input/output interface or circuit of the chip, and the processing unit 710 in the communication apparatus 700 may be a processor in the chip.

Optionally, the communication apparatus 700 may further include a storage unit 730, where the storage unit 730 may be used to store instructions or data, and the processing unit 710 may execute the instructions or data stored in the storage unit to enable the communication apparatus to implement corresponding operations.

It should also be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and therefore, for brevity, detailed descriptions thereof are omitted here.

In another possible design, the communication device 700 may correspond to the communication device in the above method embodiment. The communication apparatus 700 may be a communication device or an apparatus configured on a communication device, such as a chip. The communication device may be a terminal device or a network device.

It should be understood that the communication device 700 may correspond to a communication device in the method according to the embodiments of the present application described above, and that the communication device 700 may include means for performing the method performed by the communication device in the method in fig. 6. Also, the units and other operations and/or functions in the communication device 700 are respectively for realizing the 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 apparatus 700 is a chip configured (or used) in a communication device, the transceiver unit 720 in the communication apparatus 700 may be an input/output interface or circuit of the chip, and the processing unit 710 in the communication apparatus 700 may be a processor in the chip.

Optionally, the communication apparatus 700 may further include a storage unit 730, where the storage unit 730 may be used to store instructions or data, and the processing unit 710 may execute the instructions or data stored in the storage unit to enable the communication apparatus to implement corresponding operations.

It should also be understood that, the specific processes of the units for executing the corresponding steps described above have been described in detail in the above method embodiments, and are not described herein again for brevity.

It should be understood that the transceiving unit 720 in the communication device 700 may be implemented by a communication interface (such as a transceiver or an input/output interface), for example, may correspond to the transceiver 810 in the terminal equipment 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 apparatus 700 may correspond to a memory in the terminal device 800 shown in fig. 8.

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

Fig. 8 is a schematic structural diagram of a terminal device 800 according to an embodiment of the present application. The terminal device 800 can be applied to the system shown in fig. 1, and performs the functions of the terminal device or the communication device in the above method embodiment. As shown, the terminal device 800 includes a processor 820 and a transceiver 810. Optionally, the terminal device 800 further comprises a memory. The processor 820, the transceiver 810 and the memory may communicate with each other, and may transmit control and/or data signals, through the interconnection paths. The memory is used for storing computer programs, and the processor 820 is used for executing the computer programs in the memory to control the transceiver 810 to transmit and receive signals.

The processor 820 and the memory may be combined into a processing device, and the processor 820 is configured to execute the program codes stored in the memory to realize the functions. In particular implementations, the memory may be integrated with the processor 820 or separate from the processor 820. The processor 820 may correspond to the processing unit in fig. 7.

The transceiver 810 described above may correspond to the transceiving unit in fig. 7. The transceiver 810 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Wherein the receiver is used for receiving signals, and the transmitter is used for transmitting signals.

It should be understood that the terminal equipment 800 shown in fig. 8 is capable of implementing the procedures involving the terminal device in the method embodiment shown in fig. 6. The operations and/or functions of the modules in the terminal device 800 are respectively to implement the corresponding flows in the above-described method embodiments. Reference may be made specifically to the description of the above method embodiments, and a detailed description is appropriately omitted herein to avoid redundancy.

The processor 820 may be used to perform the actions described in the previous method embodiments as being implemented internally by the terminal device, and the transceiver 810 may be used to perform the sending or receiving actions described in the previous method embodiments. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

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

In addition, in order to improve the functions of the terminal device, the terminal device 800 may further include input and output means, such as one or more of an input unit, a display unit, an audio circuit, a camera, a sensor, and the like, and the audio circuit may further include a speaker, a microphone, and the like.

Fig. 9 is a schematic structural diagram of a network device provided in an embodiment of the present application, where the network device 900 may be applied to the system shown in fig. 1, and performs the functions of the communication apparatus in the foregoing method embodiments. As shown in fig. 9, the network device 900 includes a processor 920 and a transceiver 910. Optionally, the network device 900 further comprises a memory. The processor 920, the transceiver 910 and the memory may communicate with each other via internal connection paths to transmit control and/or data signals. The memory is used for storing a computer program, and the processor 920 is used for executing the computer program in the memory to control the transceiver 910 to transmit and receive signals.

The processor 920 and the memory can be combined into a processing device, and the processor 920 is configured to execute the program codes stored in the memory to implement the functions described above. In particular implementations, the memory may also be integrated with the processor 820 or separate from the processor 920. The processor 920 may correspond to the processing unit in fig. 7.

The transceiver 910 described above may correspond to the transceiving unit in fig. 7. The transceiver 910 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). The receiver is used for receiving signals, and the transmitter is used for transmitting signals.

It should be understood that the network device 900 shown in fig. 9 is capable of implementing various processes involving communications devices in the method embodiment shown in fig. 6. The operations and/or functions of the modules in the network device 900 are respectively for implementing the corresponding flows in the above method embodiments. Reference may be made specifically to the description of the above method embodiments, and a detailed description is omitted here where appropriate to avoid repetition.

The processor 920 may be configured to perform the actions described in the foregoing method embodiments, which are implemented by the communication device, and the transceiver 910 may be configured to perform the actions of transmitting or receiving in the foregoing method embodiments. Please refer to the description in the previous embodiment of the method, which is not repeated herein.

The embodiment of the application also provides a processing device, which comprises a processor and a (communication) interface; the processor is configured to perform the method of any of the above method embodiments.

It is to be understood that the processing means described above may be one or more chips. For example, the processing device may be a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Microcontroller (MCU), a Programmable Logic Device (PLD), or other integrated chips.

According to the method provided by the embodiment of the present application, the present application further provides a computer program product, which includes: computer program code which, when executed by one or more processors, causes an apparatus comprising the processor to perform the method in the embodiment shown in figure 6.

The technical solutions provided in the embodiments of the present application may be wholly or partially implemented by software, hardware, firmware, or any combination thereof. When implemented in 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. The procedures or functions described in accordance with the embodiments of the application are all or partially generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, special purpose computer, computer network, network appliance, terminal appliance, core network appliance, machine learning appliance, or other programmable apparatus. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital Video Disk (DVD)), or a semiconductor medium, among others.

According to the method provided by the embodiment of the present application, the present application further provides a computer-readable storage medium storing program code, which when executed by one or more processors causes an apparatus including the processors to execute the method in the embodiment shown in fig. 6.

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

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

Claims (24)

1. A method for transmitting a reference signal, comprising:

sending configuration information to a terminal device, wherein the configuration information is used for configuring a plurality of initialization information groups of a reference signal, the reference signal is used for data channel demodulation, one of the initialization information groups comprises at least one piece of initialization information, and the initialization information is used for generating the reference signal;

sending first indication information to the terminal device, wherein the first indication information is used for indicating a first initialization information group in the plurality of initialization information groups;

and sending a first reference signal to the terminal device, wherein initialization information of the first reference signal is first initialization information, and the first initialization information group comprises the first initialization information.

2. The method of claim 1,

the first indication information is carried in first control information, the first control information is used for scheduling a first data channel, and the first reference signal is used for demodulating the first data channel; alternatively, the first and second electrodes may be,

the first indication information is carried in activation information, the activation information is used for activating the first initialization information group, and the activation information is a Media Access Control (MAC) Control Element (CE) or second control information.

3. The method of claim 2, wherein the first indication information is carried in the first control information,

the first control information further includes second indication information indicating the first initialization information in the first initialization information group, or,

the first initialization information is initialization information predefined in the first initialization information group.

4. The method according to any one of claims 1 to 3, wherein the transmitting the first reference signal to the terminal device comprises:

transmitting Q reference signals to a plurality of terminal devices on a first resource, wherein the Q reference signals comprise 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, M is a positive integer greater than 1,

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

if Q is larger than M, the initialization information of M reference signals in Q reference signals is the same.

5. The method of claim 4, wherein the Q reference signals correspond to Q antenna ports, and wherein one of the Q reference signals is transmitted by the corresponding antenna port.

6. The method according to claim 4 or 5, wherein the serving cell of the terminal device includes K initialization information groups, where K is an integer greater than 1, the K initialization information groups include the plurality of initialization information groups, the maximum number of the reference signals carried by the first resource is P, and P is a product of K and M.

7. The method according to any one of claims 1 to 6, further comprising:

and generating 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 service cell of the terminal equipment, and at least two initialization information groups in the plurality of initialization information groups contain different initialization information.

8. A method for transmitting a reference signal, comprising:

receiving configuration information from a network device, the configuration information being used for configuring a plurality of initialization information sets of a reference signal, the reference signal being used for data channel demodulation, one of the plurality of initialization information sets comprising at least one initialization information, the initialization information being used for generating the reference signal;

receiving first indication information from the network equipment, wherein the first indication information is used for indicating first initialization information in the plurality of initialization information groups;

receiving a first reference signal from the network device, where initialization information of the first reference signal is first initialization information, and the first initialization information belongs to the first initialization information group.

9. The method of claim 8,

the first indication information is carried in first control information, the first control information is used for scheduling a first data channel, and the first reference signal is used for demodulating the first data channel; alternatively, the first and second electrodes may be,

the first indication information is carried in activation information, the activation information is used for activating a first initialization information group in the plurality of initialization information groups, and the activation information is a Media Access Control (MAC) Control Element (CE) or second control information.

10. The method of claim 9, wherein the first indication information is carried in the first control information,

the first control information further includes second indication information indicating 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.

11. An apparatus for transmitting a reference signal, comprising:

a processing unit, configured to determine a plurality of initialization information sets of a reference signal, where one of the plurality of initialization information sets includes at least one piece of initialization information, the initialization information is used to generate the reference signal, and the reference signal is used for data channel demodulation;

a transceiving unit, configured to send configuration information to a terminal device, where the configuration information is used to configure the plurality of initialization information groups;

the transceiver 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, where initialization information of the first reference signal is first initialization information, and the first initialization information group includes the first initialization information.

12. The apparatus of claim 11,

the first indication information is carried in first control information, the first control information is used for scheduling a first data channel, and the first reference signal is used for demodulating the first data channel; alternatively, the first and second liquid crystal display panels may be,

the first indication information is carried in activation information, the activation information is used for activating the first initialization information group, and the activation information is a Media Access Control (MAC) Control Element (CE) or second control information.

13. The apparatus of claim 12, wherein the first indication information is carried in the first control information,

the first control information further includes second indication information indicating the first initialization information in the first initialization information group, or,

the first initialization information is initialization information predefined in the first initialization information group.

14. The apparatus according to any one of claims 11 to 13,

the transceiver unit is specifically configured to send Q reference signals to a plurality of terminal devices on a first resource, where Q reference signals include the first reference signal and Q is an integer greater than 1, where a maximum number of the reference signals that are orthogonal to each other and are 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 Q reference signals is the same;

if Q is larger than M, the initialization information of M reference signals in Q reference signals is the same.

15. The apparatus of claim 14, wherein the Q reference signals correspond to Q antenna ports, and wherein one of the Q reference signals is transmitted by a corresponding antenna port.

16. 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, the K initialization information groups include the plurality of initialization information groups, the maximum number of the reference signals carried by the first resource is P, and P is a product of K and M.

17. The apparatus according to any one of claims 11 to 16,

the processing unit is specifically configured to generate the initialization information group according to cell identification information and/or according to group identification information of the initialization information group, where the cell identification information is identification information of a serving cell of the terminal device, and at least two initialization information groups in the plurality of initialization information groups include different initialization information.

18. An apparatus for transmitting a reference signal, comprising:

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

the transceiver unit is further configured to receive 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;

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

a processing unit, configured to determine that initialization information of the first reference signal is first initialization information, where the first initialization information belongs to the first initialization information group.

19. The apparatus of claim 18,

the first indication information is carried in first control information, the first control information is used for scheduling a first data channel, and the first reference signal is used for demodulating the first data channel; alternatively, the first and second electrodes may be,

the first indication information is carried in activation information, the activation information is used for activating a first initialization information group in the plurality of initialization information groups, and the activation information is a Media Access Control (MAC) Control Element (CE) or second control information.

20. The apparatus of claim 19, wherein the first indication information is carried in the first control information,

the first control information further includes second indication information indicating 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.

21. A communications apparatus comprising at least one processor coupled to a memory;

the memory is used for storing programs or instructions;

the at least one processor is configured to execute the programs or instructions to cause the apparatus to implement the method of any of claims 1-10.

22. A chip comprising at least one processor and a communication interface;

the communication interface is used for receiving signals input into the chip or signals output from the chip, and the processor is communicated with the communication interface and realizes the method according to any one of claims 1 to 10 through logic circuits or execution of code instructions.

23. A computer-readable storage medium having stored thereon instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1 to 10.

24. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 10.

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