CN109391449B

CN109391449B - Method and communication device for transmitting reference signal

Info

Publication number: CN109391449B
Application number: CN201710687928.5A
Authority: CN
Inventors: 黄煌; 高宽栋; 颜矛; 张希
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-08-11
Filing date: 2017-08-11
Publication date: 2021-07-09
Anticipated expiration: 2037-08-11
Also published as: WO2019029346A1; CN109391449A

Abstract

A method and a communication device for transmitting reference signals. The application provides a communication method, network equipment and terminal equipment. The method comprises the following steps: the method comprises the steps that first network equipment sends first indication information to terminal equipment, wherein the first indication information is used for indicating that a first antenna port sent by the first network equipment or second network equipment is the same as a second antenna port, the first antenna port is used for transmitting a synchronization block, and the second antenna port is used for transmitting a reference signal. The embodiment of the application can improve the spectrum efficiency.

Description

Method and communication device for transmitting reference signal

Technical Field

The present application relates to the field of communications, and more particularly, to a method and a communication apparatus for transmitting reference signals in the field of communications.

Background

The development of mobile services places increasing demands on the data rate and efficiency of wireless communications. In future wireless communication systems, beamforming techniques are used to limit the energy of the transmitted signal within a certain beam direction, thereby increasing the efficiency of signal and reception. The beam forming technology can effectively enlarge the transmission range of wireless signals and reduce signal interference, thereby achieving higher communication efficiency and obtaining higher network capacity. However, in a communication network using a beamforming technique, a transmit beam and a receive beam need to be matched first, so that a gain from a transmitting end to a receiving end is maximized, otherwise, relatively high communication efficiency cannot be obtained. In order to achieve full coverage, the network device side is required to scan the beam. Beam scanning presents a number of problems, one of which is the increased overhead of broadcast information transmission.

In order to reduce the overhead of broadcast information transmission, the NR system defines periods of various SS burst sets, which may be, for example, 5ms, 10ms, 20ms, 40ms, 80ms, or 160 ms. The network device may select the period of transmission as needed. In the 5G NR system, as shown in fig. 1, a plurality of synchronization blocks (SS blocks) constitute one SS pulse (burst), and a plurality of SS bursts constitute one SS pulse set (burst set). One Synchronization block refers to a symbol combination of a Primary Synchronization Signal (PSS), a Physical Broadcast Channel (PBCH), and a Secondary Synchronization Signal (SSS), where PSS and SSS occupy 144 subcarriers, and PSCH occupies 288 carriers.

Each PBCH symbol includes a Demodulation Reference Signal (DMRS). The prior art demodulates the DMRS in the PSCH adjacent to the PSS or SSs in one SS block by transmitting pilots in the bandwidth part that the PSS or SS cannot cover (i.e., adjacent bandwidth parts of the PSS and SSs). However, this scheme limits the necessity to transmit the pilot using the same port as the SS block. Thus, implementation of network devices is limited, resulting in low spectrum efficiency.

Disclosure of Invention

The application provides a method and a communication device for transmitting reference signals, which can improve the spectrum efficiency.

In a first aspect, a method for transmitting a reference signal is provided, including:

the method comprises the steps that first network equipment sends first indication information to terminal equipment, wherein the first indication information is used for indicating that a first antenna port sent by the first network equipment or second network equipment is the same as a second antenna port, the first antenna port is used for transmitting a synchronization block, and the second antenna port is used for transmitting a reference signal.

Optionally, the first network device sends second indication information to the terminal device, where the second indication information is used to indicate at least one of a time domain, a frequency domain, a sequence, and a sending power of a reference signal transmitted by the second port.

In a second aspect, a method for transmitting a reference signal is provided, including:

the method comprises the steps that terminal equipment receives first indication information sent by first network equipment, wherein the first indication information is used for indicating that a first antenna port sent by the first network equipment or second network equipment is the same as a second antenna port, the first antenna port is used for transmitting a synchronization block, and the second antenna port is used for transmitting a reference signal.

In this embodiment, the network device may further generate a synchronization block and a reference signal, where the synchronization block includes a physical broadcast channel PBCH, the PBCH includes a demodulation reference signal DMRS, and a frequency position of at least a part of the first resource element REs occupied by the reference signal is the same as a frequency position of at least a part of the second resource element REs occupied by the DMRS.

And the network equipment sends the synchronization block and the reference signal to terminal equipment through the same antenna port.

Here, the network device may be the first network device or the second network device. The first network is set as a network device in a serving cell of the terminal device, and the second network device is a terminal device of a neighboring cell of the serving cell of the terminal device. That is, the network device may transmit the synchronization block and the reference signal to a serving cell, or may transmit the synchronization block and the reference signal to a neighboring cell of the serving cell of the network device. It should be noted that the neighboring cell herein may be a cell immediately adjacent to the serving cell, or may be a cell separated from the serving cell by one or more cells, which is not limited in this embodiment of the present application.

Optionally, in this embodiment of the application, the DMRS in the PBCH carries a time index (time index) of the synchronization block, where the time index of the synchronization block is used to determine a timing sequence of a cell to which the synchronization block belongs.

Here, the terminal device may obtain SS blocks of the local cell and the neighboring cells. When the terminal device obtains the SS block of the adjacent cell, the time sequence of the adjacent cell can be obtained according to the time index in the SS block, and at this time, the terminal device can perform cell switching according to the time sequence of the adjacent cell.

In the embodiment of the present application, the first antenna port is the same as the second antenna port, and it can be understood that the second antenna port and an Orthogonal Frequency Division Multiplexing (OFDM) symbol transmitted on the first antenna port experience the same channel in a transmission process. That is, the precoding and beamforming of the OFDM symbols transmitted on the first antenna port and the second antenna port are the same.

In this way, the network device may dynamically schedule any data and reference signals to be transmitted on the PSS/SSS adjacent bandwidth (i.e., the second time-frequency resource). And if the reference signal transmitted on the adjacent bandwidth can assist the demodulation of the PBCH DMRS, informing the user so as to demodulate the PBCH DMRS according to the reference signal. Therefore, the frequency spectrum efficiency can be improved.

Optionally, the terminal device receives second indication information sent by the network device, where the second indication information is used to indicate at least one of a time domain, a frequency domain, a sequence, and a sending power of a reference signal transmitted by the second port.

Optionally, the synchronization block includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH, where a time domain position of a first resource element RE occupied by a reference signal transmitted by the second port is the same as a time domain position of an RE occupied by the PSS or the SSS, and a frequency domain position of the first resource element RE is different from a frequency domain position of the RE occupied by the PSS or the SSS.

Optionally, the reference signal transmitted by the second port is carried in a control resource set CORSET, a physical downlink control channel PDCCH, or a physical downlink data channel PDSCH.

Optionally, the reference signal transmitted by the second port includes at least one of: DMRS, CSI-RS, PTRS, and TRS.

Specifically, the second indication information may be explicitly or implicitly notified to the terminal. When the terminal device is explicitly notified, the second indication information may have at least one bit indicating at least one of a time domain, a frequency domain, a sequence, and a transmission power of the RS.

When the terminal device is informed in an implicit manner, the base station may inform the terminal device of a specific signal used by the second time-frequency resource for transmission, and the terminal device may deduce the specific signal of the reference signal according to the transmitted signal. Moreover, when the terminal device is informed in an implicit mode, the signaling overhead of the network device can be saved, and the utilization rate of resources is improved.

After acquiring the specific information of the reference signals, the terminal device demodulates the PBCH DMRS in the adjacent SS block, for example, using the reference signals, and acquires information carried by the DMRS.

Optionally, the PBCH includes a demodulation reference signal DMRS, where time-domain positions and frequency-domain positions of second resource elements REs occupied by the DMRS included in the PBCH are different from those of the PSS or the SSS, and frequency positions of at least some of the first resource elements REs occupied by the reference signal transmitted by the second port are the same as those of at least some of the second REs occupied by the DMRS included in the PBCH.

Therefore, at least part of RS has the same frequency position as that of the PBCH DMRS or covers the frequency positions of all PBCH DMRS RE, so that the terminal equipment can demodulate the PBCH DMRS better according to the reference signal, the accuracy of channel estimation of the DMRS RE is improved, and the demodulation performance of the DMRS sequence is further improved.

Optionally, if the number of the first REs is greater than the number of the second REs, the frequency positions of the partial REs of the first resource are the same as the frequency positions of the second REs; or

If the number of the first REs is equal to the number of the second REs, the frequency position of the first RE is the same as the position of a partial RE in the second RE; or

If the number of the first REs is smaller than the number of the second REs, the frequency position of the first RE is the same as the position of a part of REs in the second RE.

In a third aspect, a communication apparatus is provided, which may be specifically a network device, where the network device provided in this application has a function of implementing the behavior of the network device in the first aspect of the method, and includes components (means) corresponding to the steps or functions described in the above method aspect. The steps or functions may be implemented by software, or hardware, or by a combination of hardware and software.

In one possible design, the network device includes one or more processors and transceiver units. The one or more processors are configured to enable the network device to perform corresponding functions in the above-described methods. For example, DCI is generated, or indication information and QCL information are generated. The receiving and sending unit is used for supporting the network equipment to communicate with other equipment and realizing receiving/sending functions. For example, the DCI generated by the processor is transmitted, or the indication information and QCL information generated by the processor are transmitted, and RRC signaling is transmitted.

In this application, "/" may mean "and/or".

Optionally, the base station may also include one or more memories for coupling with the processor that store program instructions and data necessary for the base station. The one or more memories may be integral with the processor or separate from the processor. The present application is not limited.

The network device may be a base station, a TRP, etc., and the transceiver unit may be a transceiver, or a transceiver circuit.

The network device may also be a communication chip. The transceiver unit may be an input/output circuit or an interface of a communication chip.

In another possible design, the network device includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver to transceive signals, the memory is configured to store a computer program, and the processor is configured to retrieve from the memory and execute the computer program, so that the network device performs the method performed by the network device in any of the first aspect, the second aspect, any of the possible implementations of the first aspect, or any of the possible implementations of the second aspect.

In a fourth aspect, a communication device, which may be a terminal device specifically, is provided, where the terminal device provided in the present application has a function of implementing the behavior of the terminal device in the second aspect of the foregoing method, and includes components (means) corresponding to the steps or functions described in the foregoing method aspects. The steps or functions may be implemented by software, or hardware, or by a combination of hardware and software.

In one possible design, the terminal device includes one or more processors and a transceiver unit. The receiving and sending unit is used for supporting the communication between the terminal equipment and other equipment and realizing the receiving/sending function. For example, DCI is received, or indication information and QCL information, RRC information, and the like are received. The one or more processors are configured to enable the terminal device to perform the corresponding functions in the above-described method. For example, DMRS ports are determined.

Optionally, the terminal device may further comprise one or more memories for coupling with the processor, which stores program instructions and data necessary for the base station. The one or more memories may be integral with the processor or separate from the processor. The present application is not limited.

The terminal device may be a UE, and the transceiver unit may be a transceiver or a transceiver circuit.

The terminal equipment can also be a communication chip. The transceiver unit may be an input/output circuit or an interface of a communication chip.

In another possible design, the terminal device includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver to transceive signals, the memory is configured to store a computer program, and the processor is configured to retrieve from the memory and execute the computer program, so that the terminal device performs the method performed by the network device in any of the first aspect, the second aspect, any of the possible implementations of the first aspect, or any of the possible implementations of the second aspect.

In a fifth aspect, a system is provided, which includes the terminal device and the network device.

In a sixth aspect, there is provided a computer program product comprising: a computer program (also referred to as code, or instructions), which when executed, causes a computer to perform the method of any of the first aspect, the second aspect, any of the possible implementations of the first aspect, or any of the possible implementations of the second aspect described above.

In a seventh aspect, a computer-readable medium is provided, which stores a computer program (which may also be referred to as code or instructions) that, when executed on a computer, causes the computer to perform the method of any of the first aspect, the second aspect, any of the possible implementations of the first aspect, or any of the possible implementations of the second aspect.

In an eighth aspect, a method of transmitting a reference signal is provided, including:

the method comprises the steps that a network device generates a synchronization block and a reference signal, wherein the synchronization block comprises a Physical Broadcast Channel (PBCH), the PBCH comprises a demodulation reference signal (DMRS), and the frequency position of at least part of Resource Elements (REs) in first Resource Elements (REs) occupied by the reference signal is the same as the frequency position of at least part of Resource Elements (REs) in second Resource Elements (REs) occupied by the DMRS;

In a ninth aspect, a method for transmitting reference signals is provided, including:

the method comprises the steps that terminal equipment receives a synchronization block and a reference signal sent by network equipment through the same antenna port, wherein the synchronization block comprises a Physical Broadcast Channel (PBCH), the PBCH comprises a demodulation reference signal (DMRS), and the frequency positions of at least part of Resource Elements (RE) in first Resource Elements (RE) occupied by the reference signal are the same as the frequency positions of at least part of Resource Elements (RE) in second Resource Elements (RE) occupied by the DMRS.

Optionally, the synchronization block further includes a primary synchronization signal PSS and a secondary synchronization signal SSS, where a time domain position of a first resource element RE occupied by the reference signal is the same as and a frequency domain position of an RE occupied by the PSS or the SSS is different, and a time domain position of a second resource element RE occupied by the DMRS is different from and a frequency domain position of an RE occupied by the PSS or the SSS is different.

Optionally, the reference signal is carried in a control resource set CORSET, a physical downlink control channel PDCCH, or a physical downlink data channel PDSCH.

Optionally, the reference signal is DMRS, CSI-RS, PTRS, or TRS.

A tenth aspect provides a communication apparatus, which may be specifically a network device, where the network device provided by the present application has a function of implementing the behavior of the network device in the ninth aspect, and includes components (means) corresponding to the steps or functions described in the foregoing method aspects. The steps or functions may be implemented by software, or hardware, or by a combination of hardware and software.

In this application, "/" may mean "and/or".

In another possible design, the network device includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver to transmit and receive signals, the memory is configured to store a computer program, and the processor is configured to call and execute the computer program from the memory, so that the network device performs the method performed by the network device in any one of the possible implementations of the eighth aspect, the ninth aspect, and the eighth aspect, or any one of the possible implementations of the ninth aspect.

In an eleventh aspect, a communication device, which may be a terminal device specifically, is provided, where the terminal device provided in this application has a function of implementing the behavior of the terminal device in the tenth method aspect, and includes components (means) corresponding to the steps or functions described in the method aspect. The steps or functions may be implemented by software, or hardware, or by a combination of hardware and software.

In another possible design, the terminal device includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver to transceive signals, the memory is configured to store a computer program, and the processor is configured to call and execute the computer program from the memory, so that the terminal device performs the method performed by the network device in any one of the possible implementations of the eighth aspect, the ninth aspect, and the eighth aspect, or any one of the possible implementations of the ninth aspect.

In a twelfth aspect, a system is provided, which includes the terminal device and the network device.

In a thirteenth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform any of the above-described eighth aspect, ninth aspect, eighth aspect, or any of the possible implementations of the ninth aspect.

In a fourteenth aspect, a computer-readable medium is provided, which stores a computer program (which may also be referred to as code or instructions) that, when executed on a computer, causes the computer to perform the method of any of the above-described eighth, ninth, eighth, or ninth aspects, or any of the ninth aspects.

Drawings

FIG. 1 is a schematic diagram of an SS burst set in an embodiment of the present application.

Fig. 2 is a schematic diagram of a method for transmitting a reference signal in an embodiment of the present application.

Fig. 3 is a schematic diagram of a synchronization block in an embodiment of the present application.

Fig. 4 is a schematic diagram of another synchronization block in the embodiment of the present application.

Fig. 5 is a schematic block diagram of a network device in an embodiment of the present application.

Fig. 6 is a schematic block diagram of another network device in an embodiment of the present application.

Fig. 7 is a schematic block diagram of a terminal device in an embodiment of the present application.

Fig. 8 is a schematic block diagram of another terminal device in the embodiment of the present application.

Fig. 9 is a schematic block diagram of another network device in the embodiment of the present application.

Fig. 10 is a schematic block diagram of another network device of an embodiment of the present application.

Fig. 11 is a schematic block diagram of another terminal device in the embodiment of the present application.

Fig. 12 is a schematic block diagram of another terminal device in the embodiment of the present application.

Detailed Description

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

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a future fifth Generation (5G) System, or a New Radio Network (NR), etc.

Terminal equipment in the embodiments of the present application may refer to user equipment, access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal device may also be 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 Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The Network device in this embodiment may be a device for communicating with a terminal device, where the Network device may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) System or a Code Division Multiple Access (CDMA) System, may also be a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) System, may also be an evolved node b (eNB, or eNodeB) in an LTE System, may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or may be a relay Station, an Access point, a vehicle-mounted device, a wearable device, a Network device in a future 5G Network, or a Network device in a future evolved PLMN Network, and the like, and the embodiment of the present invention is not limited.

Fig. 2 shows a schematic diagram of a method for transmitting a reference signal in an embodiment of the present application. It should be understood that fig. 2 shows steps or operations of a method of transmitting a reference signal, but the steps or operations are merely examples, and other operations or variations of the operations in fig. 2 may also be performed by embodiments of the present application. Moreover, the various steps in FIG. 2 may be performed in a different order presented in FIG. 2, and it is possible that not all of the operations in FIG. 2 may be performed.

The network device generates a synchronization block (SS block) and a Reference Signal (RS) 210.

Specifically, as shown in fig. 1, a synchronization block includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH, the PBCH includes a demodulation reference signal DMRS, and the synchronization block is transmitted on a first time-frequency resource. Here, DMRSs included in PBCH are referred to as PBCH DMRSs. In particular, the synchronization block and the reference signal may be located in one or more OFDM symbols, which may be specifically the symbols shown in fig. 1 described above. Wherein, the second resource element RE occupied by the demodulation reference signal PBCH DMRS is different from the RE occupied by the PSS or the SSS in time domain position and frequency domain position. Specifically, the PSS and SSS occupy 144 subcarriers, the PBCH occupies 288 subcarriers, and the PSS and SSS do not cover the entire bandwidth of the PBCH.

Specifically, each PBCH symbol includes a Resource Element (RE) and a PBCH DMRS RE, where the data RE carries Master Information Block (MIB) Information. The PBCH DMRS as a reference signal may be used for demodulating the data REs. In the 5G NR system, several bits (bit) of information may also be carried in the PBCH DMRS.

The DMRS in the PBCH is unknown to the terminal device, and the terminal needs to demodulate the sequence of the DMRS (i.e., the information of the bits carried in the DMRS) first, and then demodulate the data RE in the PBCH according to the DMRS. Specifically, the terminal device needs to demodulate PSS/SSS first, then perform channel estimation on DMRS REs according to the known PSS/SSS, and then demodulate the PBCH DMRS sequence.

And the PSS/SSS/PBCH in one SS block adopts the same antenna port to transmit. Thus, both digital or analog precoding (precoding) and beamforming (beamforming) in an SS block are the same. In this embodiment, the synchronization block may be sent on the first time-frequency resource through the first antenna port.

In this embodiment, the network device may generate a reference signal according to the synchronization block, and the reference signal is sent on the second time-frequency resource. The time domain position of the RE occupied by the reference signal is the same as the time domain position of the RE occupied by the PSS or the SSS, and the frequency domain position of the RE occupied by the reference signal is different from the time domain position of the RE occupied by the PBCH, that is, the time domain position of the RE occupied by the PSS or the SSS in the second time-frequency resource is the same as the time domain position of the RE occupied by the PBCH in the first time-frequency resource, and the frequency domain position of the RE occupied by the PBCH in the second time-frequency resource is different from the time domain position of the RE occupied by the PBCH in the first time-frequency resource.

That is to say, the second time-frequency resource is a time-frequency resource adjacent to the SS block, and the overlapping of the second time-frequency resource and the bandwidth of the PSS is the bandwidth of the PBCH, or the overlapping of the second time-frequency resource and the bandwidth of the SSs is the bandwidth of the PBCH. Specifically, fig. 3 shows a schematic diagram of a first time-frequency resource and a second time-frequency resource (i.e., part C) in the embodiment of the present application. The PBCH symbol in fig. 3 contains B, A and B parts, where a part is the same bandwidth as PSS or SSS and B part is the same bandwidth as the second time-frequency resource.

220, the network device sends the synchronization block and the reference signal to the terminal device.

Specifically, the network device may send the synchronization block and the reference signal to a serving cell, or send the synchronization block and the reference signal to a neighboring cell of the serving cell of the network device. It should be noted that the neighboring cell herein may be a cell immediately adjacent to the serving cell, or may be a cell separated from the serving cell by one or more cells, which is not limited in this embodiment of the present application.

Specifically, the network device may send the synchronization block to the terminal device on the first time-frequency resource, and send the reference signal RS to the terminal device on the second time-frequency resource. Wherein, the first resource element RE occupied by the reference signal is the same as the RE occupied by the PSS or the SSS in time domain position and different in frequency domain position, and the second resource element RE occupied by the demodulation reference signal PBCH DMRS is different from the RE occupied by the PSS or the SSS in time domain position and different in frequency domain position.

Optionally, in this embodiment of the application, at least some of the first resource elements RE occupied by the reference signal have the same frequency position as at least some of the second resource elements RE occupied by the PBCH DMRS.

Specifically, fig. 4 shows a schematic diagram of frequency positions of REs of reference signals and REs of PBCH DMRS in the embodiment of the present application. It can be seen that, if the number of the first REs is greater than the number of the second REs, the frequency positions of the partial REs of the first resource are the same as the frequency positions of the second REs. If the density of the RSs is higher than that of the PBCH DMRS, part of the RSs are placed on the same subcarriers as the PBCH DMRS, i.e., as shown in part (c) of fig. 4.

If the number of the first REs is equal to the number of the second REs, the frequency position of the first RE is the same as the position of a partial RE in the second RE. If the density of the RSs is equal to that of the PBCH DMRS, all the RSs are placed on the same subcarriers of the PBCH DMRS, i.e., as shown in part (b) of fig. 4.

If the number of the first REs is smaller than the number of the second REs, the frequency position of the first RE is the same as the position of a part of REs in the second RE. In other words, if the density of the RSs is less than that of the PBCH DMRS, all the RSs are placed on the same subcarriers of the PBCH DMRS, i.e., as shown in part (a) of fig. 4.

In addition, one synchronization block shown in fig. 3 may have 4 adjacent C resources (each C resource may be considered as one of the above-mentioned second time-frequency resources). The RS transmitted in the embodiment of the present application may be placed in the 4C resources shown in fig. 3, or a part of the 4C resources. E.g. only 1 or 2 or 3C resource parts placed therein. For example, when the RS is placed with 2C resources therein, only 2C resources frequency-divided with the PSS, or 2C resources frequency-divided with the SSS are placed.

Specifically, it can be specified in the protocol which C resource portions are to transmit the RS, and no additional notification by the base station is required. Alternatively, the base station may notify the terminal device which C resource portions the RS is transmitted in. For example, the base station transmits a "control channel PDCCH for scheduling minimum system information (minimum system information") using C resources frequency-divided with SSS, the default RS is placed in 2C resources frequency-divided with SSS.

Optionally, when the frequency positions of at least part of the resource elements RE in the first resource elements RE occupied by the reference signal and at least part of the RE in the second RE occupied by the PBCH DMRS are the same, the network device may send the synchronization block and the reference signal to the terminal device through the same antenna port (i.e., the first antenna port). Therefore, at least part of RS has the same frequency position as that of the PBCH DMRS, or covers the frequency positions of all PBCH DMRS REs, so that the terminal equipment can demodulate the PBCH DMRS better according to the reference signal, the accuracy of channel estimation on the PBCH DMRS REs is improved, and the demodulation performance of the PBCH DMRS sequence is further improved.

Or, optionally, the network device may send the synchronization block and the reference signal to the terminal device through the second antenna port.

Specifically, the network device may further send, to the terminal device, a reference signal on the second time-frequency resource through the second antenna port (the port number of the second antenna port may be different from the port number of the first antenna port), where the reference signal may be used for the terminal device to demodulate the PBCH DMRS sequence.

It should be understood that, in the embodiment of the present application, the reference signal is a reference signal sent on the second time-frequency resource, and the reference signal is used to demodulate the PBCH DMRS in the first time-frequency resource.

And 230, the network equipment sends the first indication information to the terminal equipment.

Here, the first indication information is used to indicate that a first antenna port sent by the first network device or the second network device is the same as a second antenna port, where the first antenna port is used to transmit a synchronization block, and the second antenna port is used to transmit a reference signal.

Specifically, the first network device is a network device of a serving cell of the terminal device, that is, the first network device is a serving base station or a serving network device of the terminal device. The second network device is a network device of a neighbor cell of the serving cell. Specifically, the serving cell and the neighboring cell may refer to the description above, and are not described herein again to avoid repetition. Specifically, if the reference signal transmitted by the neighboring cell on the PSS/SSS adjacent bandwidth resource can assist the demodulation of the PBCH DMRS, the serving network device (e.g., serving base station) of the current terminal device may transmit the first indication information to the terminal device.

In this way, the network device may dynamically schedule any data and reference signals to be transmitted on the PSS/SSS adjacent bandwidth (i.e., the second time-frequency resource). And if the reference signal transmitted on the adjacent bandwidth can assist the demodulation of the PBCH DMRS, informing the user so as to demodulate the PBCH DMRS according to the reference signal.

Specifically, the first indication Information may be carried in PBCH, RMSI, other System Information (SI) broadcast, other SI on demand (on demand), Downlink Control Information (DCI) signaling, Medium Access Control (MAC) signaling, and Radio Resource Control (RRC) signaling.

Optionally, the network device may further send second indication information to the terminal device, where the second indication information is used to indicate at least one of a time domain, a frequency domain, a sequence, and a transmission power of the RS.

The second indication information may be carried in the PBCH, the RMSI, the broadcast other SI, the on demand other SI, the DCI signaling, the MAC signaling, or the RRC signaling. Specifically, the second indication information may use a reserved field in the signaling or the message, or jointly encode with other fields in the signaling, so that signaling overhead of the system may be reduced, and resource utilization rate may be improved.

Optionally, the RS may be supported by a control resource set CORSET, a physical downlink control channel PDCCH, and a physical downlink data channel PDSCH. Wherein DMRSs for demodulating data are included in the sets, PDCCH, and PDSCH.

Optionally, in this embodiment of the present application, the RS may be a DMRS, a CSI-RS, a PTRS, or a TRS.

That is, the second time-frequency resource may be used to transmit a CORSET, PDCCH, or PDSCH that includes a DMRS, and may also be used to transmit a CSI-RS, PTRS, or TRS.

And 240, the terminal equipment demodulates the PBCH DMRS.

Specifically, the terminal device may demodulate the PBCH DMRS according to the reference signal received at the first antenna port. Because the frequency positions of at least part of the resource elements RE in the first resource elements RE occupied by the reference signal are the same as the frequency positions of at least part of the resource elements RE in the second resource elements occupied by the PBCH DMRS, the terminal equipment can demodulate the PBCH DMRS according to the reference signal better, improve the accuracy of channel estimation on the PBCH DMRS RE and further improve the demodulation performance of the PBCH DMRS sequence.

Alternatively, the terminal device may demodulate the PBCH DMRS using the RS transmitted on the second antenna port after receiving the first indication information.

And, the terminal device may receive the second indication information sent by the network device, and determine the specific information of the reference signal, for example, at least one of a time domain, a frequency domain, a sequence and a transmission power of the reference signal.

Or, after receiving the reference signal on the second time-frequency resource, the terminal device may infer specific information of the reference signal according to the transmitted specific signal, for example, at least one of a time domain, a frequency domain, a sequence, and a transmission power of the reference signal.

For example, the reference signal may be carried in a control resource set CORSET, a physical downlink control channel PDCCH, and a physical downlink data channel PDSCH. Wherein DMRSs for demodulating data are included in the sets, PDCCH, and PDSCH. At this time, the terminal device may determine the specific information of the reference signal according to the resource or channel specifically carried by the reference signal. For example, if the PDCCH is transmitted, for information of the DMRS carried in the PDCCH, the user may deduce specific information of the reference signal through one or more of the following known information: time domain, frequency-frequency position, cell Identification (ID), user Identification (ID), DMRS port number, etc. where PDCCH is located.

Alternatively, the reference signal may be DMRS, CSI-RS, PTRS, or TRS. The terminal device may determine the specific information of the reference signal according to the specific type of the reference signal (the specific type of the reference signal is, for example, DMRS, CSI-RS, PTRS, or TRS). For example, if the CSI-RS is transmitted, the user may infer specific information of the reference signal CSI-RS by one or more known information: the time domain and frequency location of the CSI-RS, cell Identification (ID), user Identification (ID), CSI-RS port number and the like.

For another example, the network device may inform the terminal of at least one of resource setting (resource setting), resource set (resource set), resource (resource) and port (port) information of DMRS, CSI-RS, PTRS or TRS transmitted on the second time-frequency resource, and inform the terminal device which port has the same channel as a symbol transmitted by an antenna port transmitting the SS block. At this time, the terminal device obtains the specific information of the reference signal according to the resource setting and/or resource set and/or resource and/or port information of the RS sent on the same port as the port for transmitting the SS block. After acquiring the specific information of the reference signals, the terminal device demodulates the PBCH DMRSs in the adjacent SS blocks, for example, using the reference signals, and acquires information carried by the PBCH DMRSs.

As an example, the network device may notify the terminal device that the DMRS with port number 5 is transmitted on the adjacent bandwidth resource of the PSS/SSS, and this port is the same as port 0 of the adjacent SS block, and after receiving the notification from the network device, the terminal device may demodulate the PBCH DMRS using the DMRS. Or the network device informs the terminal device PSS/SSS of transmitting the TRS with port number 20 on the adjacent bandwidth resource, and the port is the same as port 0 of the adjacent SS Block, and after receiving the notification from the network device, the terminal device may demodulate the PBCH DMRS by using the DMRS.

Therefore, in this embodiment of the application, a network device sends a synchronization block to a terminal device through a first antenna port, sends a reference signal to the terminal device through a second antenna port, and sends first indication information for indicating that the second antenna port is the same as the first antenna port to the terminal device, so that the terminal device can demodulate the PBCH DMRS in the SS block according to the first indication information and the reference signal. By the method for transmitting the reference signal, the network equipment can flexibly select the antenna port to transmit the reference signal to the terminal equipment on the adjacent bandwidth of the PSS/SSS, so that the frequency spectrum efficiency of a communication system can be improved.

And when the frequency positions of at least part of the Resource Elements (REs) in the first Resource Element (RE) occupied by the reference signal are the same as the frequency positions of at least part of the REs in the second RE occupied by the PBCH DMRS, and the network device transmits the reference signal by using the second antenna port, the demodulation performance of the PBCH DMRS sequence can be further improved while the system spectrum efficiency is improved.

In this embodiment, the communication device may be a network device or a terminal device. The communication apparatus in the embodiment of the present application will be described below with reference to fig. 5 to 12.

Fig. 5 shows a schematic block diagram of a network device 500 according to an embodiment of the present application. The network device 500 comprises a transmitting unit 510.

A sending unit 510, configured to send first indication information to a terminal device, where the first indication information is used to indicate that a first antenna port sent by the network device or a second network device is the same as a second antenna port, where the first antenna port is used to transmit a synchronization block, and the second antenna port is used to transmit a reference signal.

It should be noted that in the embodiment of the present invention, the sending unit 510 may be implemented by a transceiver. As shown in fig. 6, network device 600 may include a processor 610, a memory 620, and a transceiver 630. The memory 620 may be used for storing codes and the like executed by the processor 610, and the processor 610 may be used for processing data or programs.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 610. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 620, and the processor 610 reads the information in the memory 620 and performs the steps of the above method in combination with the hardware thereof. To avoid repetition, it is not described in detail here.

The network device 500 shown in fig. 5 or the network device 600 shown in fig. 6 can implement each process corresponding to the method embodiment shown in fig. 2, specifically, the network device 500 or the network device 600 may refer to the description in fig. 2, and is not described herein again to avoid repetition.

The embodiment of the present application provides a computer-readable medium for storing a computer program, where the computer program includes instructions for executing the method corresponding to the terminal device in the foregoing various implementation manners in fig. 2.

An embodiment of the present application further provides a communication chip, where instructions are stored, and when the communication chip is run on the network device 500 or the network device 600, the communication chip is enabled to execute the method corresponding to the network device in the foregoing various implementation manners in fig. 2.

Fig. 7 shows a schematic block diagram of a terminal device 700 according to an embodiment of the present application. The terminal device 700 comprises a receiving unit 710.

A receiving unit 710, configured to receive first indication information sent by a first network device, where the first indication information is used to indicate that a first antenna port sent by the first network device or a second network device is the same as a second antenna port, where the first antenna port is used to transmit a synchronization block, and the second antenna port is used to transmit a reference signal.

It should be noted that, in the embodiment of the present invention, the receiving unit 710 may be implemented by a transceiver. As shown in fig. 8, terminal device 800 may include a processor 810, a memory 820, and a transceiver 830. The memory 820 may be used for storing codes and the like executed by the processor 810, and the processor 810 may be used for processing data or programs.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 810. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 820, and the processor 810 reads the information in the memory 820 and combines the hardware to complete the steps of the above method. To avoid repetition, it is not described in detail here.

The terminal device 700 shown in fig. 7 or the terminal device 800 shown in fig. 8 can implement each process corresponding to the method embodiment shown in fig. 2, specifically, the terminal device 700 or the terminal device 800 may refer to the description in fig. 2, and is not described herein again to avoid repetition.

An embodiment of the present application further provides a communication chip, where instructions are stored, and when the communication chip runs on the terminal device 700 or the terminal device 800, the communication chip is enabled to execute the method corresponding to the terminal device in the foregoing various implementation manners in fig. 2.

Fig. 9 shows a schematic block diagram of a network device 900 according to an embodiment of the present application. The network device 900 includes a generating unit 910 and a transmitting unit 920.

A generating unit 910, configured to generate a synchronization block and a reference signal, where the synchronization block includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH, and the PBCH includes a demodulation reference signal DMRS, and a frequency position of at least a part of resource elements RE in first resource elements RE occupied by the reference signal is the same as a frequency position of at least a part of resource elements RE in second resource elements RE occupied by the DMRS;

a sending unit 920, configured to send the synchronization block and the reference signal to a terminal device through the same antenna port.

It should be noted that, in the embodiment of the present invention, the generating unit 910 may be implemented by a processor, and the transmitting unit 920 may be implemented by a transceiver. As shown in fig. 10, network device 1000 may include a processor 1010, a memory 1020, and a transceiver 1030. The memory 1020 may be used for storing codes and the like executed by the processor 1010, and the processor 1010 may be used for processing data or programs.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1010. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1020, and the processor 1010 reads the information in the memory 1020 and performs the steps of the above method in combination with the hardware thereof. To avoid repetition, it is not described in detail here.

The network device 900 shown in fig. 9 or the network device 1000 shown in fig. 10 can implement each process corresponding to the foregoing method embodiment shown in fig. 2, specifically, the network device 900 or the network device 1000 may refer to the description in fig. 2, and is not described here again to avoid repetition.

An embodiment of the present application further provides a communication chip, where instructions are stored, and when the communication chip is run on the network device 900 or the network device 1000, the communication chip is enabled to execute the method corresponding to the network device in the foregoing various implementation manners in fig. 2.

Fig. 11 shows a schematic block diagram of a terminal device 1100 according to an embodiment of the present application. The terminal device 1100 includes a receiving unit 1110.

A receiving unit 1110, configured to receive a synchronization block and a reference signal sent by a network device through a same antenna port, where the synchronization block includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH, the PBCH includes a demodulation reference signal DMRS, and frequency positions of at least part of resource elements RE in first resource elements RE occupied by the reference signal are the same as frequency positions of at least part of resource elements RE in second resource elements RE occupied by the PBCH DMRS.

It should be noted that, in the embodiment of the present invention, the receiving unit 1110 may be implemented by a transceiver. As shown in fig. 12, the terminal device 1200 may include a processor 1210, a memory 1220, and a transceiver 1230. The memory 1220 may be used for storing codes and the like executed by the processor 1210, and the processor 1210 may be used for processing data or programs.

In implementation, the steps of the above method may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1210. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1220, and the processor 1210 reads the information in the memory 1220, and performs the steps of the above method in combination with the hardware thereof. To avoid repetition, it is not described in detail here.

The terminal device 1100 shown in fig. 11 or the terminal device 1200 shown in fig. 12 can implement each process corresponding to the method embodiment shown in fig. 2, specifically, the terminal device 1100 or the terminal device 1200 may refer to the description in fig. 2, and is not described again here to avoid repetition.

An embodiment of the present application further provides a communication chip, where instructions are stored, and when the communication chip is run on the terminal device 1100 or the terminal device 1200, the communication chip is enabled to execute the method corresponding to the terminal device in the foregoing various implementation manners in fig. 2.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

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 place, or may be distributed on a plurality of 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.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

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

Claims

1. A method for transmitting reference signals, comprising:

a first network device sends first indication information to a terminal device, where the first indication information is used to indicate that a first antenna port sent by the first network device or a second network device is the same as a second antenna port, where the first antenna port is used to transmit a synchronization block, and the second antenna port is used to transmit a reference signal;

the synchronization block includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a physical broadcast channel PBCH, where the PBCH includes a demodulation reference signal DMRS, where a time domain position and a frequency domain position of a second resource element RE occupied by the DMRS included in the PBCH are different from those of the PSS or the SSS, and frequency positions of at least a part of resource elements RE in a first resource element RE occupied by a reference signal transmitted by the second antenna port are the same as those of at least a part of RE in a second RE occupied by the DMRS included in the PBCH.

2. The method of claim 1, further comprising:

and the first network equipment sends second indication information to the terminal equipment, wherein the second indication information is used for indicating at least one of time domain, frequency domain, sequence and sending power of the reference signal transmitted by the second antenna port.

3. The method of claim 1 or 2, wherein the first Resource Elements (REs) occupied by the reference signals transmitted by the second antenna port are located at the same time domain and different frequency domain positions as the REs occupied by the PSS or the SSS.

4. The method of claim 1 or 2, wherein the reference signal transmitted by the second antenna port is carried in a control resource set (CORSET), a Physical Downlink Control Channel (PDCCH), or a physical downlink data channel (PDSCH).

5. The method according to claim 1 or 2, wherein the reference signal transmitted by the second antenna port comprises at least one of: DMRS, CSI-RS, PTRS, and TRS.

6. The method of claim 1,

if the number of the first REs is greater than the number of the second REs, the frequency positions of the partial REs of the first resource are the same as the frequency positions of the second REs; or

7. A method for transmitting reference signals, comprising:

a terminal device receives first indication information sent by a first network device, wherein the first indication information is used for indicating that a first antenna port sent by the first network device or a second network device is the same as a second antenna port, the first antenna port is used for transmitting a synchronization block, and the second antenna port is used for transmitting a reference signal;

8. The method of claim 7, further comprising:

and the terminal equipment receives second indication information sent by the network equipment, wherein the second indication information is used for indicating at least one of a time domain, a frequency domain, a sequence and a sending power of the reference signal transmitted by the second antenna port.

9. The method of claim 7 or 8, wherein the first Resource Elements (REs) occupied by reference signals transmitted by the second antenna port are located at the same time and different frequency domains as the REs occupied by the PSS or the SSS.

10. The method according to claim 7 or 8, wherein the reference signal transmitted by the second antenna port is carried in a control resource set CORSET, a physical downlink control channel PDCCH, or a physical downlink data channel PDSCH.

11. The method according to claim 7 or 8, wherein the reference signal transmitted by the second antenna port comprises at least one of: DMRS, CSI-RS, PTRS, and TRS.

12. The method of claim 7,

13. A communications apparatus, comprising:

a sending unit, configured to send first indication information to a terminal device, where the first indication information is used to indicate that a first antenna port sent by the communication apparatus or a second network device is the same as a second antenna port, where the first antenna port is used to transmit a synchronization block, and the second antenna port is used to transmit a reference signal;

14. The communications apparatus of claim 13, wherein the transmitting unit is further configured to:

and sending second indication information to the terminal device, where the second indication information is used to indicate at least one of a time domain, a frequency domain, a sequence, and a sending power of the reference signal transmitted by the second antenna port.

15. The apparatus of claim 13 or 14, wherein the first Resource Elements (REs) occupied by the reference signals transmitted by the second antenna port have the same time domain position and different frequency domain positions as the REs occupied by the PSS or the SSS.

16. The communication apparatus according to claim 13 or 14, wherein the reference signal transmitted by the second antenna port is carried in a control resource set, CORSET, a physical downlink control channel, PDCCH, or a physical downlink data channel, PDSCH.

17. The communication apparatus according to claim 13 or 14, wherein the reference signal transmitted by the second antenna port comprises at least one of: DMRS, CSI-RS, PTRS, and TRS.

18. A communication apparatus according to claim 13 or 14, comprising:

19. A communications apparatus, comprising:

a receiving unit, configured to receive first indication information sent by a first network device, where the first indication information is used to indicate that a first antenna port sent by the first network device or a second network device is the same as a second antenna port, where the first antenna port is used to transmit a synchronization block, and the second antenna port is used to transmit a reference signal;

20. The communications apparatus of claim 19, wherein the receiving unit is further configured to:

and receiving second indication information sent by the first network device, where the second indication information is used to indicate at least one of a time domain, a frequency domain, a sequence, and a transmission power of a reference signal transmitted by the second antenna port.

21. The apparatus of claim 19 or 20, wherein the first Resource Elements (REs) occupied by the reference signals transmitted by the second antenna port have the same time domain position and different frequency domain positions as the REs occupied by the PSS or the SSS.

22. The communications device according to claim 19 or 20, wherein the reference signal transmitted by the second antenna port is carried in a control resource set, CORSET, a physical downlink control channel, PDCCH, or a physical downlink data channel, PDSCH.

23. The communications apparatus as claimed in claim 19 or 20, wherein the reference signal transmitted by the second antenna port comprises at least one of: DMRS, CSI-RS, PTRS, and TRS.

24. A communication apparatus according to claim 19 or 20, comprising: