WO2018228181A1 - Pbch dedicated demodulation reference signal transmission method and apparatus - Google Patents

Abstract

Disclosed are a PBCH dedicated demodulation reference signal transmission method and apparatus. In the present application, a network device generates a PBCH dedicated demodulation reference signal to be sent on a PBCH; and the network device sends the PBCH dedicated demodulation reference signal on the PBCH, PBCH dedicated demodulation reference signals of different cells in a same time domain occupying different frequency domain resources and/or corresponding to different signal sequences. The present application can reduce inter-cell PBCH interference.

Description

PBCH exclusive demodulation reference signal transmission method and device

The present application claims priority to Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. No. Combined in this application.

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a PBCH-specific demodulation reference signal transmission method and apparatus.

Background technique

The Physical Broadcast Channel (PBCH) carries a Broadcast Channel (BCH), which is used to transmit important parameters in the cell, including system bandwidth, system frame number, and physical hybrid automatic retransmission indicator channel (Physical Hybrid ARQ Indicator Channel). , PHICH) information and some necessary system information. The cell information is broadcasted through the PBCH through a PBCH broadcast, such as a Master Information Block (MIB).

In the 4th Generation mobile communication technology (4G) Long Term Evolution (LTE) system, the PBCH uses a cell-specific reference signal (CRS) as a demodulation reference signal. Channel estimation.

In the 3rd Generation Partnership Project (3GPP) 5th Generation mobile communication technology New Radio (5G NR) study, there is no CRS, so a new reference is needed. Signal transmission scheme.

Summary of the invention

The embodiment of the present application provides a PBCH-specific demodulation reference signal transmission method and apparatus.

In a first aspect, a PBCH-specific demodulation reference signal transmission method is provided, including:

The network device generates a PBCH-specific demodulation reference signal for transmission on the PBCH; the network device transmits the PBCH-specific demodulation reference signal on the PBCH, where PBCH-specific demodulation reference signals of different cells in the same time domain occupy Different frequency domain resources and/or corresponding different signal sequences.

Optionally, the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences, including: the PBCH-specific demodulation reference signals of different cells have at least one of the following aspects: Different:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the network device sends a PBCH-specific demodulation reference signal N times in a PBCH information update period, where N is an integer greater than or equal to 1, wherein the PBCH-specific demodulation reference signal sent N times in the same cell is at least One of the following aspects is different:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain locations, are based on the same root sequence, and use the same cyclic shift; in a PBCH information update period of the same cell, N times The transmitted PBCH-specific demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or,

PBCH-specific demodulation reference signals of different cells in the same time domain occupy the same frequency domain position, based on the same root sequence but use different cyclic shifts; in a PBCH information update period of the same cell, N times of PBCH exclusive transmission The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or

The PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, based on different root sequences but use the same cyclic shift; in the PBCH information update period of the same cell, the PBCH exclusive transmissions sent N times The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or

PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, based on the same root sequence but use different cyclic shifts; in a PBCH information update period of the same cell, N times of PBCH exclusive transmission The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift.

Optionally, in the PBCH-specific demodulation reference signal that is sent N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal that is sent each time uses a corresponding one of the beams, and the P-transmission PBCH exclusive to the N times The demodulation reference signal has a one-to-one correspondence with the N beam indexes; or

In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one.

Optionally, the sequence corresponding to the PBCH-specific demodulation reference signal is a ZC sequence.

In a second aspect, a PBCH-specific demodulation reference signal transmission method is provided, including:

The terminal receives the PBCH-specific demodulation reference signal, where the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences;

The terminal performs channel estimation according to the PBCH-specific demodulation reference signal.

Optionally, the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences, including: the PBCH-specific demodulation reference signals of different cells have at least one of the following aspects: Different:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the PBCH-specific demodulation reference signals transmitted N times in one PBCH information update period of the same cell are different at least in one of the following aspects:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain locations, are based on the same root sequence, and use the same cyclic shift; in a PBCH information update period of the same cell, N times The transmitted PBCH-specific demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or,

PBCH-specific demodulation reference signals of different cells in the same time domain occupy the same frequency domain position, based on the same root sequence but use different cyclic shifts; in a PBCH information update period of the same cell, N times of PBCH exclusive transmission The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or

The PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, based on different root sequences but use the same cyclic shift; in the PBCH information update period of the same cell, the PBCH exclusive transmissions sent N times The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or

PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, based on the same root sequence but use different cyclic shifts; in a PBCH information update period of the same cell, N times of PBCH exclusive transmission The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift.

Optionally, in the PBCH-specific demodulation reference signal that is sent N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal that is sent each time uses a corresponding one of the beams, and the P-transmission PBCH exclusive to the N times The demodulation reference signal has a one-to-one correspondence with the N beam indexes; or

In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one.

Optionally, the sequence corresponding to the PBCH-specific demodulation reference signal is a ZC sequence.

In a third aspect, a network device is provided, including:

Generating a module, configured to generate a PBCH-specific demodulation reference signal for transmission on the PBCH;

And a sending module, configured to send the PBCH-specific demodulation reference signal on the PBCH, where the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences.

Optionally, the PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the sending module is specifically configured to: send a PBCH-specific demodulation reference signal N times in a PBCH information update period, where N is an integer greater than or equal to 1, wherein PBCH exclusive demodulation is sent N times in the same cell. The reference signal differs at least in one of the following ways:

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, in the PBCH-specific demodulation reference signal that is sent N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal that is sent each time uses a corresponding one of the beams, and the P-transmission PBCH exclusive to the N times The demodulation reference signal has a one-to-one correspondence with the N beam indexes; or

In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one.

In a fourth aspect, a terminal is provided, including:

a receiving module, configured to receive a PBCH-specific demodulation reference signal, where PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences;

And a channel estimation module, configured to perform channel estimation according to the PBCH-specific demodulation reference signal.

Optionally, the PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the PBCH-specific demodulation reference signals transmitted N times in one PBCH information update period of the same cell differ at least in one of the following aspects:

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, in the PBCH-specific demodulation reference signal that is sent N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal that is sent each time uses a corresponding one of the beams, and the P-transmission PBCH exclusive to the N times The demodulation reference signal has a one-to-one correspondence with the N beam indexes; or

In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one.

According to a fifth aspect, a communication device is provided, including: a processor, a memory, a transceiver, and a bus interface; the processor is configured to read a program in the memory, and perform the solution provided by any one of the foregoing first aspects. method.

In a sixth aspect, a communication device is provided, including: a processor, a memory, a transceiver, and a bus interface; the processor is configured to read a program in the memory, and perform the solution provided by any of the foregoing second aspects. method.

A seventh aspect, a computer storage medium storing computer executable instructions for causing the computer to perform any of the possible aspects of the first aspect described above Methods.

In an eighth aspect, a computer storage medium is provided, the computer readable storage medium storing computer executable instructions for causing the computer to perform any of the possible aspects of the second aspect above Methods.

According to a ninth aspect, a network device includes a processor, a memory, and a transceiver, where

A processor for reading a program in the memory, performing the following process:

Generating a PBCH-specific demodulation reference signal for transmission on the PBCH; transmitting the PBCH-specific demodulation reference signal on the PBCH by the transceiver, wherein the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequencies Domain resources and/or correspond to different signal sequences.

According to a tenth aspect, a terminal includes a processor, a memory, and a transceiver, where

A processor for reading a program in the memory, performing the following process:

Receiving, by the transceiver, a PBCH-specific demodulation reference signal, where PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences; according to the PBCH exclusive demodulation reference signal Perform channel estimation.

In the above embodiment, the network device generates a reference signal for transmission on the PBCH and transmits the reference signal on the PBCH. The reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences, so that reference signals can be transmitted on the PBCH, and PBCH interference between cells can be further reduced.

DRAWINGS

1 is a schematic diagram of a network architecture applicable to an embodiment of the present application;

2A and 2B are schematic diagrams of PBCH-specific modulation reference signal resources provided by the solution 1 in the embodiment of the present application;

2C is a schematic diagram of a PBCH-specific modulation reference signal resource provided by the second embodiment of the present application;

3A and FIG. 3B are schematic diagrams of PBCH-specific modulation reference signal resources provided by scheme 3 in the embodiment of the present application;

3C is a schematic diagram of a PBCH-specific modulation reference signal resource provided by the fourth embodiment of the present application;

4A and FIG. 4B are schematic diagrams of PBCH-specific modulation reference signal resources provided by scheme 5 in the embodiment of the present application;

4C is a schematic diagram of a PBCH-specific modulation reference signal resource according to Embodiment 6 of the present application;

5A and FIG. 5B are schematic diagrams of PBCH-specific modulation reference signal resources provided by scheme 7 in the embodiment of the present application;

5C is a schematic diagram of a PBCH-specific modulation reference signal resource according to Embodiment 8 of the present application;

FIG. 6 is a schematic diagram of a reference signal transmission process according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a network device according to another embodiment of the present application;

FIG. 10 is a schematic structural diagram of a terminal according to another embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), New Radio (NR), etc.

It should be understood that, in the embodiment of the present invention, the user equipment (User Equipment, UE) includes but is not limited to a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (handset). And portable devices, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular" The telephone device, the computer with wireless communication function, etc., the user equipment can also be a mobile device that is portable, pocket-sized, handheld, built-in, or in-vehicle.

In an embodiment of the invention, a base station (e.g., an access point) may refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface. The base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network. The base station can also coordinate attribute management of the air interface. For example, the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in TD-SCDMA or WCDMA, or may be an evolved base station (eNodeB or eNB or e- in LTE). NodeB, evolutional Node B), or a base station (gNB) in 5G NR, the present invention is not limited.

The embodiment of the present application proposes a transmission method and a device based on the reference signal transmitted on the PBCH, and the device includes a network device and a terminal. The network device sends the reference signal designed in the embodiment of the present application, and the terminal can use the reference signal to implement PBCH channel estimation. In the embodiment of the present application, by designing the reference signal, the PBCH-specific demodulation reference signals of different cells (such as neighboring cells) in the same time domain are distinguished, thereby solving the PBCH interference problem between different cells, which can be improved. The PBCH detects the demodulation reliability, which can reduce the system signaling overhead, thereby improving the system transmission efficiency. The method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.

The embodiments of the present application are applicable to a 3GPP 5G NR system or an evolved system thereof.

The technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments.

FIG. 1 exemplarily shows one possible system architecture of an embodiment of the present application. As shown in FIG. 1, the system architecture may include an access node 10 and a core network (CN) 20 and a terminal 30 in an access network. Terminal 30 communicates with access node 10 over a wireless connection, for the sake of clarity, only one access node and one terminal are shown. The access node 10 is connected to a core network (CN). The devices in the core network can be divided into a Control Plane (CP) device 201 and a User Plane (UP) device 202. The control plane device can also be used. It is called a control plane network element, and the user plane device can also be called a user plane network element.

It should be noted that the control plane device and the user plane device are only one name, and the name itself does not limit the device. For example, the control plane device may also be replaced with a "control plane entity" or other name. Moreover, the control plane device may also correspond to an entity including other functions in addition to the control plane function. The user plane device may also be replaced with a "user plane entity" or other name, and the user plane device may also correspond to an entity including other functions in addition to the user plane function. A unified explanation is given here, and will not be described below.

A terminal, also called a user equipment (UE), a mobile station (MS), a mobile terminal (MT), etc., is a device that provides voice and/or data connectivity to a user. For example, a handheld device having a wireless connection function, an in-vehicle device, or the like. Currently, some examples of terminals are: mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality. (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart grid Wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and the like.

An access node refers to a device that accesses a core network, and may be, for example, a base station. The base station includes, but is not limited to, an evolved Node B (eNB), a radio network controller (RNC), and a Node B (Node B, NB). Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (for example, Home evolved NodeB, or Home Node B, HNB), Base Band Unit (BBU), new Air interface base station (g NodeB, gNB), transmission point (Transmitting and receiving point (TRP), transmission point (TP), mobile switching center, and the like.

The network architecture described in the embodiments of the present application is for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and does not constitute a limitation of the technical solutions provided by the embodiments of the present application. As those skilled in the art may understand, with the evolution of the network architecture, The technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

In the embodiments of the present application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning thereof.

The term “and/or” in the embodiment of the present application is merely an association relationship describing an association object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist at the same time. There are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

The solution provided by the embodiments of the present application will be described in more detail below with reference to the accompanying drawings.

In the embodiment of the present application, the reference signal for transmission on the PBCH may include a dedicated demodulation reference signal, or include other reference signals, which is not limited in this embodiment of the present application. The following embodiment is described by taking an example of transmitting a dedicated demodulation reference signal on a PBCH, which may also be expressed as a PBCH-specific demodulation reference signal.

In the embodiment of the present application, the PBCH-specific modulation reference signal sent by the network device may be generated by using a specific sequence as a base sequence (ie, a base sequence) and by cyclic shift. For example, the network device may generate a sequence of the PBCH-specific modulation reference signal of the cell 1 by using the first specific sequence as a base sequence, and generate a sequence of the PBCH-specific modulation reference signal of the cell 2 by using the second specific sequence as a base; for example, the network device The first specific sequence may be used as the base sequence, and the base sequence is cyclically shifted in the first manner to obtain a sequence of the PBCH-specific demodulation reference signal of the cell 1, and the base sequence is cyclically shifted in the second manner to obtain a cell. The PBCH exclusive demodulation reference signal sequence of 2. Wherein the first specific sequence and the second specific sequence are different, the first mode cyclic shift and the second mode cyclic shift are different in the shift direction and/or the shift bit number, for example, the first mode cyclic shift It means shifting one bit to the left, and the cyclic shift mode of the second mode means shifting two bits to the left. For example, the first mode cyclic shift means shifting one bit to the left, and the second mode of cyclic shifting means shifting one bit to the right.

The specific sequence used to generate the PBCH-specific demodulation reference signal sequence may be a sequence with good autocorrelation, low cross-correlation, and lower Peak to Average Power Ratio (PAPR), such as A ZC sequence having the above properties can be used. The ZC sequence can be generated by cyclic shifting of the base sequence. The Discrete Fourier Transform (DFT) of the ZC sequence can still be used as the characteristic of the ZC sequence. The ZC sequence is first subjected to DFT transformation, and then the fast Fourier is performed. Inverse Fast Fourier Transform (IFFT) generation. Certainly, the specific sequence used to generate the PBCH-specific demodulation reference signal sequence may also be other types of sequences or other generated sequences, which is not limited in this embodiment of the present application.

In the embodiment of the present application, the sequence of the PBCH-specific demodulation reference signal is a ZC sequence. An expression for a ZC sequence is given below:

为PBCH所需解调参考信号长度，q为基序列的根。 among them,

The length of the reference signal is demodulated for the PBCH, and q is the root of the base sequence.

In the embodiment of the present application, in order to distinguish the PBCH-specific demodulation reference signals of different cells (such as neighboring cells) to reduce the interference of PBCHs in different cells, in the embodiment of the present application, the PBCH exclusive solutions of different cells in the same time domain The reference signal occupies different frequency domain resources, or corresponds to different signal sequences, or occupies different frequency domain resources and corresponds to different signal sequences.

Specifically, the PBCH-specific demodulation reference signals of different cells in the same time domain differ at least in one of the following aspects:

The PBCH-specific demodulation reference signal occupies a different frequency domain position. For example, the cell 1 and the cell 2 are adjacent cells, and the PBCH exclusive demodulation reference signal of the cell 1 is a physical resource block (PRB) occupied by the frequency domain, and the PBCH exclusive demodulation reference signal of the cell 2 is in frequency. The PRB occupied on the domain is different. Since the PBCH-specific demodulation reference signals of the cell 1 and the cell 2 occupy different frequency domain resources, the PBCH interference of the cell 1 and the cell 2 can be reduced. Optionally, the frequency domain location occupied by the PBCH-specific demodulation reference signal of one cell may be pre-agreed.

The root sequence used to generate the PBCH-specific demodulation reference signal is different. For example, cell 1 and cell 2 are neighbor cells, and the PBCH-specific demodulation reference signal of cell 1 is generated by using the first ZC sequence as a root sequence, and the PBCH-specific demodulation reference signal of cell 2 is different from the second ZC sequence. The ZC sequence is generated as a root sequence. Since the PBCH-specific demodulation reference signal sequence of the cell 1 is different from the PBCH-specific demodulation reference signal sequence of the cell 2, the PBCH interference of the cell 1 and the cell 2 can be reduced. Optionally, the root sequence of the PBCH-specific demodulation reference signal of one cell may be pre-agreed.

The cyclic shift used when generating the PBCH-specific demodulation reference signal based on the root sequence is different. For example, cell 1 and cell 2 are neighboring cells, and the PBCH-specific demodulation reference signal of cell 1 is generated by using a certain ZC sequence as a root sequence and shifted to the right by one bit, and the PBCH exclusive demodulation reference signal of cell 2 is used for the ZC. The sequence is generated as a root sequence and shifted to the left by one bit. Since the PBCH-specific demodulation reference signal sequence of the cell 1 is different from the PBCH-specific demodulation reference signal sequence of the cell 2, the PBCH interference of the cell 1 and the cell 2 can be reduced. Alternatively, the cyclic shift used by the PBCH-specific demodulation reference signal of one cell may be pre-agreed.

The system information transmitted on the PBCH can be updated according to a set time interval, which is called a PBCH information update period. During a PBCH information update period, the PBCH information can be repeatedly transmitted multiple times at set time intervals. For example, in a 4G system, the PBCH update period is 40 ms, and the PBCH is transmitted every 10 ms in a 40 ms period, and the PBCH information (ie, system information sent through the PBCH, such as MIB) transmitted in a 40 ms period is the same. However, it is distinguished by different redundancy versions (RV).

Optionally, in order to distinguish the PBCH signals sent by the same cell at different time intervals in a PBCH information update period, in the embodiment of the present application, the PBCH exclusive demodulation reference sent by the same cell N times in one PBCH information update period The signal differs at least in one of the following:

The PBCH-specific demodulation reference signal occupies a different frequency domain position. For example, in a PBCH information update period, the PBCH-specific demodulation reference signals transmitted twice adjacently have different PRBs in the frequency domain. Since different PBCH-dedicated demodulation reference signals occupy different frequency domain resources, different PBCH or PBCH-specific demodulation reference signals transmitted may be distinguished. Optionally, the frequency domain location occupied by the PBCH-specific demodulation reference signal of one cell may be pre-agreed.

The root sequence used to generate the demodulation reference signal is different. For example, during a PBCH information update period, N times of PBCH-specific demodulation reference signals are generated for the cell 1, and the PBCH-specific demodulation reference signal sequences transmitted different times are generated based on different root sequences. Thus, for the same cell, the sequence of the PBCH-specific demodulation reference signals transmitted each time is different in one PBCH information update period.

The cyclic shift used when generating the demodulation reference signal based on the root sequence is different. For example, in a PBCH information update period, N times of PBCH-specific demodulation reference signals are generated for the cell 1, and the PBCH-specific demodulation reference signals transmitted different times are generated based on the same root sequence but with different cyclic shifts. Thus, for the same cell, the sequence of the PBCH-specific demodulation reference signals transmitted each time is different in one PBCH information update period.

When the foregoing solution of the embodiment of the present application is applied to the 3GPP 5G NR system, in a possible solution, the PBCH information update period is 80 ms, and the PBCH is sent once every 20 ms in one PBCH information update period, and is in a PBCH. The PBCH information sent during the information update period (that is, the system information sent through the PBCH, such as MIB) is the same, but is distinguished by different redundancy versions (RV).

According to the design principles of the PBCH-specific demodulation reference signal described above, the embodiments of the present application exemplarily provide some possible solutions when applied in the 3GPP 5G NR system. In the 3GPP 5G NR system, the PBCH information update period is 80 ms, and the PBCH is transmitted every 20 ms in one PBCH information update period. The PBCH occupies two Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, and occupies 288 subcarriers (ie, 24 PRBs) in the frequency domain, and transmits PBCH exclusive on the time-frequency resources occupied by the PBCH. Demodulation Reference Signal (DMRS). In the following example, the PBCH-specific reference signal is called NR PBCH DMRS or PBCH DMRS.

In the example shown in FIG. 2A to FIG. 5C below, the value of q is used to distinguish the root sequence, the same value indicates that the root sequence is the same, and the different values indicate that the root sequence is different, and the time-frequency resource occupied by the PBCH DMRS is identified. The value of q is identified in the box. The value of Vshift is used to distinguish the cyclic shift. The same value means that the cyclic shift is the same. The different values indicate different cyclic shifts. The figure is filled by the filling method. The same filling method indicates the same cyclic shift. Different The fill mode represents a different cyclic shift.

plan 1

The NR PBCH DMRS sequences of different cells are generated according to different root sequences, and the NR PBCH DMRSs of different cells occupy the same frequency domain location and adopt the same cyclic shift. For the same cell, during the NR PBCH information update period, the NR PBCH DMRS sequence is generated based on different root sequences but using the same cyclic shift, thereby distinguishing different RV versions by different root sequences.

FIG. 2A exemplarily shows the time-frequency resource position occupied by the NR PBCH DMRS of the cell 1, the cell 2, the cell 3, the root sequence used, and the cyclic shift employed, on the 2 OFDM symbols occupied by the PBCH. As shown in FIG. 2A, the frequency domain resources occupied by the NR PBCH DMRSs of the three cells are the same, and the NR PBCH DMRS sequences of the three cells are generated based on different root sequences (shown as different q values), which is The NR PBCH DMRS of the three cells adopts the same cyclic shift (shown as the same padding mode).

FIG. 2B exemplarily shows the time-frequency resource position occupied by the NR PBCH DMRS, the used root sequence, and the adopted in the PBCH that is repeatedly transmitted in multiple PBCH information update periods in the cell 1 and the cell 2. The cyclic shift. For the same cell, the network device (such as the base station) repeatedly transmits the PBCH every 20 ms in a PBCH information update period. In each PBCH transmitted, the NR PBCH DMRS of the same cell occupies the same frequency domain resource and adopts the same cyclic shift (shown as the same padding mode in the figure). During a PBCH information update period, each time the NR PBCH DMRS sequence transmitted in the cell is generated based on a different root sequence (shown as a different q value in the figure).

In the same time domain (such as 20ms position), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated according to different root sequences (shown as different q values in the figure), and NR PBCH DMRS occupation of cell 1 and cell 2 Same frequency domain position and use the same cyclic shift (shown as the same fill pattern).

Scenario 2

For different cells, the same as scenario 1, the NR PBCH DMRS sequences of different cells are generated according to different root sequences, and the NR PBCH DMRSs of different cells occupy the same frequency domain location and adopt the same cyclic shift. Different from scheme 1, for the same cell, during the NR PBCH information update period, the NR PBCH DMRS sequence is generated based on the same root sequence but with different cyclic shifts, thereby distinguishing different RV versions.

FIG. 2C exemplarily shows the time-frequency resource location occupied by the NR PBCH DMRS, the used root sequence, and the adopted in the PBCH that is repeatedly transmitted in multiple PBCH information update periods in the cell 1 and the cell 2. The cyclic shift. For the same cell, the network device (such as the base station) repeatedly transmits the PBCH every 20 ms in a PBCH information update period. In each PBCH sent, the NR PBCH DMRS of the same cell occupies the same frequency domain resource, and the NR PBCH DMRS sequence is generated according to the same root sequence (shown as the same q value in the figure) but adopts different cyclic shifts (in the figure) Expressed as a different fill method).

In the same time domain (such as 20ms position), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated based on different root sequences (represented as different q values in the figure), and NR PBCH DMRS occupation of cell 1 and cell 2 Same frequency domain position and use the same cyclic shift (shown as the same fill pattern).

Option 3

For different cells, the NR PBCH DMRS sequences of different cells are generated according to the same root sequence, and the NR PBCH DMRSs of different cells occupy the same frequency domain position, but adopt different cyclic shifts. For the same cell, during the NR PBCH information update period, the NR PBCH DMRS sequence is generated based on different root sequences but using the same cyclic shift, thereby distinguishing different RV versions.

FIG. 3A exemplarily shows the time-frequency resource position occupied by the NR PBCH DMRS of different cells, the root sequence used, and the cyclic shift employed, on the 2 OFDM symbols occupied by the PBCH. As shown in FIG. 3A, the frequency domain resources occupied by the NR PBCH DMRSs of the cell 1, the cell 2, and the cell 3 are the same, and the NR PBCH DMRS sequences of the three cells are generated based on the same root sequence (the same q value is represented in the figure). ), the NR PBCH DMRS of these three cells adopt different cyclic shifts (shown as different filling modes in the figure).

FIG. 3B exemplarily shows the time-frequency resource position occupied by the NR PBCH DMRS, the used root sequence, and the adopted in the PBCH repeatedly transmitted in the PBCH information update period in the cell 1 and the cell 2 The cyclic shift. For the same cell, the network device (such as the base station) repeatedly transmits the PBCH every 20 ms in a PBCH information update period. In each PBCH transmitted, the NR PBCH DMRS of the same cell occupies the same frequency domain resource and adopts the same cyclic shift (shown as the same padding mode in the figure). During a PBCH information update period, each time the NR PBCH DMRS sequence transmitted in the cell is generated based on a different root sequence (shown as a different q value in the figure).

On the same time domain (such as 20ms), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated according to the same root sequence (shown as the same q value in the figure), and NR PBCH DMRS occupancy of cell 1 and cell 2 Same frequency domain position and different cyclic shifts (shown as the same fill pattern).

Option 4

For different cells, the same as the scheme 3, the NR PBCH DMRS sequences of different cells are generated according to the same root sequence, and the NR PBCH DMRSs of different cells occupy the same frequency domain position, but adopt different cyclic shifts. For the same cell, unlike scheme 3, during the NR PBCH information update period, the NR PBCH DMRS sequence is generated based on the same root sequence but with different cyclic shifts.

FIG. 3C exemplarily shows the time-frequency resource location occupied by the NR PBCH DMRS, the used root sequence, and the adopted in the PBCH repeatedly transmitted in the PBCH information update period in the cell 1 and the cell 2 The cyclic shift. For the same cell, the network device (such as the base station) repeatedly transmits the PBCH every 20 ms in a PBCH information update period. In each PBCH sent, the NR PBCH DMRS of the same cell occupies the same frequency domain resource, and the NR PBCH DMRS sequence is generated according to the same root sequence (shown as the same q value in the figure) but adopts different cyclic shifts (in the figure) Expressed as a different fill method).

In the same time domain (such as 20ms position), the NR PBCH DMRS sequences of cell 1 and cell 2 adopt different cyclic shifts (shown as different filling modes in the figure), and NR PBCH DMRS occupation of cell 1 and cell 2 The same frequency domain location and based on the same root sequence (represented by the same q value in the figure).

Option 5

For different cells, NR PBCH DMRS sequences of different cells are generated according to different root sequences, and NR PBCH DMRSs of different cells occupy different frequency domain positions, but adopt the same cyclic shift. For the same cell, during the NR PBCH information update period, the NR PBCH DMRS sequence is generated based on different root sequences but using the same cyclic shift, thereby distinguishing different RV versions.

FIG. 4A exemplarily shows the time-frequency resource position occupied by the NR PBCH DMRS of different cells, the root sequence used, and the cyclic shift employed, on the 2 OFDM symbols occupied by the PBCH. As shown in FIG. 4A, the frequency domain resources occupied by the NR PBCH DMRSs of the cell 1, the cell 2, and the cell 3 are different, and the NR PBCH DMRS sequences of the three cells are generated based on different root sequences (shown as different q in the figure). Value), the NR PBCH DMRS of these 3 cells adopt the same cyclic shift (shown as the same filling mode in the figure).

FIG. 4B exemplarily shows the time-frequency resource location occupied by the NR PBCH DMRS, the used root sequence, and the adopted in the PBCH repeatedly transmitted in the PBCH information update period in the cell 1 and the cell 2 The cyclic shift. For the same cell, the network device (such as the base station) repeatedly transmits the PBCH every 20 ms in a PBCH information update period. In each PBCH transmitted, the NR PBCH DMRS of the same cell occupies the same frequency domain resource and adopts the same cyclic shift (shown as the same padding mode in the figure). During a PBCH information update period, each time the NR PBCH DMRS sequence transmitted in the cell is generated based on a different root sequence (shown as a different q value in the figure).

On the same time domain (such as 20ms), the NR PBCH DMRS sequences of Cell 1 and Cell 2 are generated according to different root sequences (shown as different q values in the figure), and NR PBCH DMRS of Cell 1 and Cell 2 Takes up different frequency domain locations, but uses the same cyclic shift (shown as the same fill pattern).

Option 6

For different cells, the same as the scheme 5, the NR PBCH DMRS sequences of different cells are generated according to the same root sequence, and the NR PBCH DMRSs of different cells occupy different frequency domain positions, but adopt the same cyclic shift. For the same cell, unlike scheme 5, during the NR PBCH information update period, the NR PBCH DMRS sequence is generated based on the same root sequence but with different cyclic shifts.

FIG. 4C exemplarily shows the time-frequency resource location occupied by the NR PBCH DMRS, the root sequence used, and the adopted in the PBCH that is repeatedly transmitted in multiple PBCH information update periods in the cell 1 and the cell 2. The cyclic shift. For the same cell, the network device (such as the base station) repeatedly transmits the PBCH every 20 ms in a PBCH information update period. In each PBCH sent, the NR PBCH DMRS of the same cell occupies the same frequency domain resource, and the NR PBCH DMRS sequence is generated according to the same root sequence (shown as the same q value in the figure) but adopts different cyclic shifts (in the figure) Expressed as a different fill method).

In the same time domain (such as 20ms), the NR PBCH DMRS sequences of cell 1 and cell 2 adopt the same cyclic shift (shown as the same padding mode), and the NR PBCH DMRS occupied by cell 1 and cell 2 Different frequency domain locations are based on different root sequences (represented by different q values in the figure).

Option 7

For different cells, the NR PBCH DMRS sequences of different cells are generated according to the same root sequence, and the NR PBCH DMRSs of different cells occupy different frequency domain positions and adopt different cyclic shifts. For the same cell, during the NR PBCH information update period, the NR PBCH DMRS sequence is generated based on different root sequences but using the same cyclic shift, thereby distinguishing different RV versions.

FIG. 5A exemplarily shows the time-frequency resource position occupied by the NR PBCH DMRS of different cells, the root sequence used, and the cyclic shift employed, on the 2 OFDM symbols occupied by the PBCH. As shown in FIG. 5A, the frequency domain resources occupied by the NR PBCH DMRSs of the cell 1, the cell 2, and the cell 3 are different, and the NR PBCH DMRS sequences of the three cells are generated based on the same root sequence (shown as different q in the figure). Value), but with the same cyclic shift (shown as the same fill pattern).

FIG. 5B exemplarily shows the time-frequency resource position occupied by the NR PBCH DMRS, the used root sequence, and the adopted in the PBCH that is repeatedly transmitted in multiple PBCH information update periods in the cell 1 and the cell 2. The cyclic shift. For the same cell, the network device (such as the base station) repeatedly transmits the PBCH every 20 ms in a PBCH information update period. In each PBCH transmitted, the NR PBCH DMRS of the same cell occupies the same frequency domain resource, and adopts the same cyclic shift (shown as the same padding mode in the figure). During a PBCH information update period, each time the NR PBCH DMRS sequence transmitted in the cell is generated based on a different root sequence (shown as a different q value in the figure).

In the same time domain (such as the position of 20ms), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated according to the same root sequence (shown as the same q value in the figure), and different cyclic shifts are used (in the figure) Indicated as different padding modes), and the NR PBCH DMRSs of cell 1 and cell 2 occupy different frequency domain locations.

Option 8

For different cells, the same as the scheme 7, the NR PBCH DMRS sequences of different cells are generated according to the same root sequence, and the NR PBCH DMRSs of different cells occupy different frequency domain positions and adopt different cyclic shifts. For the same cell, unlike scheme 7, during the NR PBCH information update period, the NR PBCH DMRS sequence is generated based on the same root sequence but with different cyclic shifts.

FIG. 5C exemplarily shows the time-frequency resource position occupied by the NR PBCH DMRS, the used root sequence, and the adopted in the PBCH that is repeatedly transmitted in multiple PBCH information update periods in the cell 1 and the cell 2. The cyclic shift. For the same cell, the network device (such as the base station) repeatedly transmits the PBCH every 20 ms in a PBCH information update period. In each PBCH sent, the NR PBCH DMRS of the same cell occupies the same frequency domain resource, and the NR PBCH DMRS sequence is generated according to the same root sequence (shown as the same q value in the figure) but adopts different cyclic shifts (in the figure) Expressed as a different fill method).

In the same time domain (such as the position of 20ms), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated according to the same root sequence (shown as the same q value in the figure), and different cyclic shifts are used (in the figure) Indicated as different padding modes), and the NR PBCH DMRSs of cell 1 and cell 2 occupy different frequency domain locations.

In the above example, the PBCH occupies 2 OFDM symbols and 288 subcarriers as an example. The number of symbols occupied by the PBCH in the time domain and the number of subcarriers occupied in the frequency domain are not limited.

FIG. 6 exemplarily shows a PBCH-specific demodulation reference signal transmission process provided by an embodiment of the present application. As shown in the figure, the process may include:

S601: A network device (such as a base station) generates a PBCH-specific demodulation reference signal for transmission on the PBCH.

Specifically, in this step, a network device (such as a base station) may generate a sequence of PBCH-specific demodulation reference signals for transmission on the PBCH according to the description of the foregoing embodiments. The PBCH-specific demodulation reference signal may be a 5G NR PBCH DMRS.

S602: The network device (such as a base station) transmits the generated PBCH-specific demodulation reference signal on the PBCH. The PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences.

Specifically, in this step, the time-frequency resource location and the transmission mode of the PBCH-specific demodulation reference signal sent by the network device (such as the base station) may be as described in the foregoing embodiment, and are not repeated here.

S603: The terminal receives a PBCH-specific demodulation reference signal sent by the network device (such as a base station) on the PBCH, and further performs channel estimation on the PBCH according to the received PBCH-specific demodulation reference signal.

Specifically, the terminal may perform soft information combining and demodulation on a PBCH-specific demodulation reference signal repeatedly transmitted in a PBCH information update period, and perform channel estimation based on the demodulated signal.

Optionally, the network device (such as the base station) may send the PBCH-specific demodulation reference signal by using the corresponding beam, and the PBCH used in each PBCH information update period uses the corresponding beam, and may transmit the PBCH exclusive demodulation reference signal. The beam used is implicitly indicated, such as the index of the indicator beam.

Optionally, the network device (such as the base station) may send the PBCH-specific demodulation reference signal by using the corresponding radio frame, and the PBCH sent in each PBCH information update period uses the corresponding radio frame, and may be demodulated by the PBCH sent by the PBCH. The reference signal implicitly indicates the radio frame used, such as an index or frame number indicating the radio frame.

As can be seen from the above description, in the embodiment of the present application, a network device (such as a base station) generates a PBCH-specific demodulation reference signal for transmitting on the PBCH, and sends the PBCH-specific demodulation reference signal on the PBCH, where The reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences, thereby improving the reliability of PBCH detection and demodulation, reducing system signaling overhead, and thereby improving system transmission efficiency.

Based on the same technical concept, the embodiment of the present application further provides a network device (such as a base station), where the network device can implement the process on the network device (such as a base station) side in the foregoing embodiment.

FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown, the network device can include: a generating module 701, and a sending module 702, where:

The generating module 701 is configured to generate a PBCH-specific demodulation reference signal for transmitting on the PBCH, and the sending module 702 is configured to send the PBCH-specific demodulation reference signal on the PBCH, where the PBCH exclusive solution of different cells in the same time domain The tone reference signal occupies different frequency domain resources and/or corresponds to different signal sequences.

Optionally, the PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the sending module 702 is specifically configured to: send a PBCH-specific demodulation reference signal N times in a PBCH information update period, where N is an integer greater than or equal to 1, wherein PBCH exclusive demodulation is sent N times in the same cell. The reference signal differs at least in one of the following ways:

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, in the PBCH-specific demodulation reference signal that is sent N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal that is sent each time uses a corresponding one of the beams, and the P-transmission PBCH exclusive to the N times The demodulation reference signal is in one-to-one correspondence with the N beam indexes; or, in the PBCH dedicated demodulation reference signal transmitted N times in one PBCH information update period of the same cell, the PBCH exclusive demodulation reference signal transmitted each time is used correspondingly For one radio frame, the PBCH-specific demodulation reference signals transmitted N times correspond to the indexes of the N radio frames.

Based on the same technical concept, the embodiment of the present application further provides a terminal, which can implement the process of the terminal side in the foregoing embodiment.

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application. As shown in the figure, the terminal may include: a receiving module 801 and a channel estimation module 802, where:

The receiving module 801 is configured to receive a PBCH-specific demodulation reference signal, where the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences; the channel estimation module 802 is configured to The PBCH exclusive demodulation reference signal performs channel estimation.

Optionally, the PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the PBCH-specific demodulation reference signals transmitted N times in one PBCH information update period of the same cell are different at least in one of the following aspects:

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, in the PBCH-specific demodulation reference signal that is sent N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal that is sent each time uses a corresponding one of the beams, and the P-transmission PBCH exclusive to the N times The demodulation reference signal is in one-to-one correspondence with the N beam indexes; or, in the PBCH dedicated demodulation reference signal transmitted N times in one PBCH information update period of the same cell, the PBCH exclusive demodulation reference signal transmitted each time is used correspondingly For one radio frame, the PBCH-specific demodulation reference signals transmitted N times correspond to the indexes of the N radio frames.

Based on the same technical concept, the embodiment of the present application further provides a network device (such as a base station), where the network device can implement the process on the network device (such as a base station) side in the foregoing embodiment.

FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown, the communication device can include a processor 901, a memory 902, a transceiver 903, and a bus interface.

The processor 901 is responsible for managing the bus architecture and general processing, and the memory 902 can store data used by the processor 801 in performing operations. The transceiver 903 is configured to receive and transmit data under the control of the processor 901.

The bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 901 and various circuits of memory represented by memory 902. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The processor 901 is responsible for managing the bus architecture and general processing, and the memory 902 can store data used by the processor 901 in performing operations.

The flow disclosed in the embodiment of the present invention may be applied to the processor 901 or implemented by the processor 901. In the implementation process, each step of the signal processing flow may be completed by an integrated logic circuit of hardware in the processor 901 or an instruction in the form of software. The processor 901 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or perform the embodiments of the present invention. Various methods, steps, and logic blocks of the disclosure. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902 and completes the steps of the signal processing flow in conjunction with its hardware.

Specifically, the processor 901 is configured to read a program in the memory 902, and perform the following process: generating a PBCH-specific demodulation reference signal for transmission on the PBCH; and transmitting the PBCH-specific demodulation on the PBCH by the transceiver 903 The reference signal, wherein the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences. For the specific implementation process of the foregoing process, refer to the description of the foregoing embodiment, which is not repeated here.

Optionally, the PBCH-specific demodulation reference signals of different cells are different in at least one of the following aspects:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the transceiver 903 is specifically configured to:

The PBCH-specific demodulation reference signal is transmitted N times in a PBCH information update period, where N is an integer greater than or equal to 1, wherein the PBCH-specific demodulation reference signal transmitted N times in the same cell differs at least in one of the following aspects:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, in the PBCH-specific demodulation reference signal that is sent N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal that is sent each time uses a corresponding one of the beams, and the P-transmission PBCH exclusive to the N times The demodulation reference signal has a one-to-one correspondence with the N beam indexes; or

In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one.

Based on the same technical concept, the embodiment of the present application further provides a terminal, which can implement the process of the terminal side in the foregoing embodiment.

FIG. 10 is a schematic structural diagram of a terminal according to an embodiment of the present application. As shown, the terminal can include a processor 1001, a memory 1002, a transceiver 1003, and a bus interface.

The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 can store data used by the processor 801 in performing operations. The transceiver 1003 is configured to receive and transmit data under the control of the processor 1001.

Optionally, the PBCH-specific demodulation reference signals of different cells are different in at least one of the following aspects:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, the PBCH-specific demodulation reference signal sent by the transceiver 1003 N times in a PBCH information update period of the same cell is different in at least one of the following aspects:

The frequency domain position occupied by the PBCH exclusive demodulation reference signal;

a root sequence for generating a PBCH-specific demodulation reference signal;

A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence.

Optionally, in the PBCH-specific demodulation reference signal that is sent N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal that is sent each time uses a corresponding one of the beams, and the P-transmission PBCH exclusive to the N times The demodulation reference signal has a one-to-one correspondence with the N beam indexes; or

In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one.

The bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1001 and various circuits of memory represented by memory 1002. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 can store data used by the processor 1001 in performing operations.

The flow disclosed in the embodiment of the present invention may be applied to the processor 1001 or implemented by the processor 1001. In the implementation process, each step of the signal processing flow may be completed by an integrated logic circuit of hardware in the processor 1001 or an instruction in the form of software. The processor 1001 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or perform the embodiments of the present invention. Various methods, steps, and logic blocks of the disclosure. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and completes the steps of the signal processing flow in conjunction with its hardware.

Specifically, the processor 1001 is configured to read a program in the memory 1002, and perform the following process: receiving, by the transceiver 1003, a PBCH-specific demodulation reference signal, where PBCH-specific demodulation reference signals of different cells in the same time domain occupy different Frequency domain resources and/or corresponding different signal sequences; channel estimation is performed according to the PBCH-specific demodulation reference signal. For the specific implementation process of the foregoing process, refer to the description of the foregoing embodiment, which is not repeated here.

Based on the same technical concept, the embodiment of the present application further provides a computer storage medium. The computer readable storage medium stores computer executable instructions for causing the computer to perform a PBCH-specific demodulation reference signal transmission flow implemented by a network device as described in the previous embodiments.

Based on the same technical concept, the embodiment of the present application further provides a computer storage medium. The computer readable storage medium stores computer executable instructions for causing the computer to perform the PBCH-specific demodulation reference signal transmission process implemented by the terminal as described in the previous embodiments.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims (28)

A physical broadcast channel PBCH exclusive demodulation reference signal transmission method, comprising: The network device generates a PBCH-specific demodulation reference signal for transmission on the PBCH; The network device sends the PBCH-specific demodulation reference signal on the PBCH, where the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences. The method according to claim 1, wherein the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences, including: The PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The method according to claim 1 or 2, wherein the network device transmits a PBCH-specific demodulation reference signal N times in a PBCH information update period, where N is an integer greater than or equal to 1, wherein N in the same cell The PBCH-specific demodulation reference signal transmitted at a time differs at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The method of claim 3 wherein: The PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, are based on the same root sequence, and use the same cyclic shift; in a PBCH information update period of the same cell, P-transmissions are sent N times. The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or PBCH-specific demodulation reference signals of different cells in the same time domain occupy the same frequency domain position, based on the same root sequence but use different cyclic shifts; in a PBCH information update period of the same cell, N times of PBCH exclusive transmission The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or The PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, based on different root sequences but use the same cyclic shift; in the PBCH information update period of the same cell, the PBCH exclusive transmissions sent N times The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, based on the same root sequence but use different cyclic shifts; PBCH exclusive transmissions sent N times in one PBCH information update period of the same cell The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift. The method according to claim 1, wherein in the PBCH-dedicated demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each of the transmitted PBCH-dedicated demodulation reference signals uses a corresponding one beam. And the PBCH exclusive demodulation reference signal sent by the N times corresponds to the N beam indexes; or In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one. The method according to claim 1, wherein the sequence corresponding to the PBCH-specific demodulation reference signal is a ZC sequence. A physical broadcast channel PBCH exclusive demodulation reference signal transmission method, comprising: The terminal receives the PBCH-specific demodulation reference signal, where the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences; The terminal performs channel estimation according to the PBCH-specific demodulation reference signal. The method according to claim 7, wherein the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences, including: The PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The method according to claim 7 or 8, wherein the PBCH-specific demodulation reference signals transmitted N times in one PBCH information update period of the same cell differs at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The method of claim 9 wherein: The PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, are based on the same root sequence, and use the same cyclic shift; in a PBCH information update period of the same cell, P-transmissions are sent N times. The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or PBCH-specific demodulation reference signals of different cells in the same time domain occupy the same frequency domain position, based on the same root sequence but use different cyclic shifts; in a PBCH information update period of the same cell, N times of PBCH exclusive transmission The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or The PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, based on different root sequences but use the same cyclic shift; in the PBCH information update period of the same cell, the PBCH exclusive transmissions sent N times The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift; or PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain positions, based on the same root sequence but use different cyclic shifts; in a PBCH information update period of the same cell, N times of PBCH exclusive transmission The demodulation reference signals are based on the same root sequence but using different cyclic shifts, or based on different root sequences but using the same cyclic shift. The method according to claim 7, wherein in the PBCH-dedicated demodulation reference signal transmitted N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal transmitted each time uses a corresponding one beam. And the PBCH exclusive demodulation reference signal sent by the N times corresponds to the N beam indexes; or In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one. The method according to claim 7, wherein the sequence corresponding to the PBCH-specific demodulation reference signal is a ZC sequence. A network device, comprising: Generating a module, configured to generate a PBCH-specific demodulation reference signal for transmission on the PBCH; And a sending module, configured to send the PBCH-specific demodulation reference signal on the PBCH, where the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences. The network device according to claim 13, wherein the PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The network device according to claim 13 or 14, wherein the sending module is configured to: send a PBCH-specific demodulation reference signal N times in a PBCH information update period, where N is an integer greater than or equal to 1, wherein The PBCH-specific demodulation reference signal transmitted N times in the same cell differs at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The network device according to claim 13, wherein in the PBCH-dedicated demodulation reference signal transmitted N times in a PBCH information update period of the same cell, the PBCH-specific demodulation reference signal transmitted each time uses a corresponding one. a beam, the PBCH-specific demodulation reference signal sent in the N times corresponds to the N beam indexes; or In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one. A terminal, comprising: a receiving module, configured to receive a PBCH-specific demodulation reference signal, where PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences; And a channel estimation module, configured to perform channel estimation according to the PBCH-specific demodulation reference signal. The terminal according to claim 17, wherein the PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The terminal according to claim 17 or 18, wherein the PBCH-dedicated demodulation reference signal transmitted N times in one PBCH information update period of the same cell differs at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The terminal according to claim 17, wherein in the PBCH-dedicated demodulation reference signal transmitted N times in one PBCH information update period of the same cell, the PBCH-specific demodulation reference signal transmitted each time uses a corresponding one beam. And the PBCH exclusive demodulation reference signal sent by the N times corresponds to the N beam indexes; or In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one. A network device, comprising: a processor, a memory, and a transceiver, wherein A processor for reading a program in the memory, performing the following process: Generating a PBCH-specific demodulation reference signal for transmission on the PBCH; transmitting the PBCH-specific demodulation reference signal on the PBCH by the transceiver, wherein the PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequencies Domain resources and/or correspond to different signal sequences. The network device according to claim 21, wherein the PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The network device according to claim 21 or 22, wherein the transceiver is specifically configured to: The PBCH-specific demodulation reference signal is transmitted N times in a PBCH information update period, where N is an integer greater than or equal to 1, wherein the PBCH-specific demodulation reference signal transmitted N times in the same cell differs at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The network device according to claim 21, wherein in the PBCH-dedicated demodulation reference signal transmitted N times in a PBCH information update period of the same cell, a corresponding one of the PBCH-specific demodulation reference signals transmitted each time is used. a beam, the PBCH-specific demodulation reference signal sent in the N times corresponds to the N beam indexes; or In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one. A terminal, comprising: a processor, a memory, and a transceiver, wherein A processor for reading a program in the memory, performing the following process: Receiving, by the transceiver, a PBCH-specific demodulation reference signal, where PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences; according to the PBCH exclusive demodulation reference signal Perform channel estimation. The terminal according to claim 25, wherein the PBCH-specific demodulation reference signals of different cells differ at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The terminal according to claim 25 or 26, wherein the PBCH-specific demodulation reference signal transmitted by the transceiver N times in one PBCH information update period of the same cell differs at least in one of the following aspects: The frequency domain position occupied by the PBCH exclusive demodulation reference signal; a root sequence for generating a PBCH-specific demodulation reference signal; A cyclic shift used when generating a PBCH-specific demodulation reference signal based on a root sequence. The terminal according to claim 25, wherein in the PBCH-dedicated demodulation reference signal transmitted N times in one PBCH information update period of the same cell, each of the transmitted PBCH-dedicated demodulation reference signals uses a corresponding one beam. And the PBCH exclusive demodulation reference signal sent by the N times corresponds to the N beam indexes; or In a PBCH-specific demodulation reference signal transmitted N times in a PBCH information update period of the same cell, each time a PBCH-specific demodulation reference signal is transmitted, a corresponding one of the radio frames is used, and the P-transmission reference of the P-transmission is performed for the N times. The signal corresponds to the index of the N radio frames one by one.

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