CN109150462B - PBCH (physical broadcast channel) dedicated demodulation reference signal transmission method and device - Google Patents

PBCH (physical broadcast channel) dedicated demodulation reference signal transmission method and device Download PDF

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CN109150462B
CN109150462B CN201710459736.9A CN201710459736A CN109150462B CN 109150462 B CN109150462 B CN 109150462B CN 201710459736 A CN201710459736 A CN 201710459736A CN 109150462 B CN109150462 B CN 109150462B
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CN109150462A (en
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李铁
郑方政
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services

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Abstract

The application discloses a PBCH exclusive demodulation reference signal transmission method and device. In the application, a network device generates a PBCH exclusive demodulation reference signal for transmitting on a PBCH; the network device sends the PBCH-specific demodulation reference signals on a PBCH, wherein the PBCH-specific demodulation reference signals of different cells on the same time domain occupy different frequency domain resources and/or correspond to different signal sequences. By adopting the method and the device, the PBCH interference among the cells can be reduced.

Description

PBCH (physical broadcast channel) dedicated demodulation reference signal transmission method and device
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for transmitting a PBCH dedicated demodulation reference signal.
Background
A Physical Broadcast Channel (PBCH) carries a Broadcast Channel (BCH) for conveying important parameters in a cell, including system bandwidth, system frame number, Physical Hybrid ARQ Indicator Channel (PHICH) information, and some necessary system information. Wherein the cell Information is broadcast through PBCH, such as Master Information Block (MIB) broadcast through PBCH.
In the 4th Generation mobile communication technology (4G) Long Term Evolution (LTE) system, the PBCH performs channel estimation using a Cell-specific reference signal (CRS) as a demodulation reference signal.
In the third Generation Partnership Project (3 GPP) fifth Generation mobile communication next Generation radio technology (5G NR) research, CRS is not already present, and thus a new reference signal transmission scheme is required.
Disclosure of Invention
The embodiment of the application provides a method and a device for transmitting PBCH (physical broadcast channel) dedicated demodulation reference signals.
In a first aspect, a method for transmitting a PBCH-specific demodulation reference signal is provided, including:
the network device generates a PBCH-specific demodulation reference signal for transmission on a PBCH; the network device sends the PBCH-specific demodulation reference signals on a PBCH, wherein the PBCH-specific demodulation reference signals of different cells on the same time domain occupy different frequency domain resources and/or correspond to different signal sequences.
Optionally, the PBCH dedicated 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 in at least one of the following ways:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, the network device sends PBCH-specific demodulation reference signals N times in one PBCH information update period, where N is an integer greater than or equal to 1, where the PBCH-specific demodulation reference signals sent N times in the same cell are different in at least one of the following respects:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, the PBCH dedicated demodulation reference signals of different cells occupy different frequency domain positions in the same time domain, are based on the same root sequence, and use the same cyclic shift; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy the same frequency domain position, are based on the same root sequence and use different cyclic shifts; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain positions, are based on different root sequences and use the same cyclic shift; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain positions, are based on the same root sequence and use different cyclic shifts; in one PBCH information update period of the same cell, the PBCH-specific demodulation reference signals transmitted N times are based on the same root sequence but using different cyclic shifts, or are based on different root sequences but using the same cyclic shift.
Optionally, in PBCH dedicated demodulation reference signals sent N times within one PBCH information update period of the same cell, each PBCH dedicated demodulation reference signal sent each time uses a corresponding beam, and the PBCH dedicated demodulation reference signals sent N times are in one-to-one correspondence with the N beam indexes; alternatively, the first and second electrodes may be,
in the PBCH exclusive demodulation reference signals sent for N times in one PBCH information updating period of the same cell, the PBCH exclusive demodulation reference signal sent for each time uses one corresponding radio frame, and the PBCH exclusive demodulation reference signals sent for N times are in one-to-one correspondence with indexes of N radio frames.
Optionally, the sequence corresponding to the PBCH-specific demodulation reference signal is a ZC sequence.
In a second aspect, a method for transmitting PBCH-specific demodulation reference signals is provided, including:
a terminal receives a PBCH exclusive demodulation reference signal, wherein the PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain resources and/or correspond to different signal sequences;
and the terminal carries out channel estimation according to the special demodulation reference signal of the PBCH.
Optionally, the PBCH dedicated 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 in at least one of the following ways:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, the PBCH-specific demodulation reference signals transmitted N times within one PBCH information update period of the same cell differ in at least one of the following ways:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, the PBCH dedicated demodulation reference signals of different cells occupy different frequency domain positions in the same time domain, are based on the same root sequence, and use the same cyclic shift; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy the same frequency domain position, are based on the same root sequence and use different cyclic shifts; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain positions, are based on different root sequences and use the same cyclic shift; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain positions, are based on the same root sequence and use different cyclic shifts; in one PBCH information update period of the same cell, the PBCH-specific demodulation reference signals transmitted N times are based on the same root sequence but using different cyclic shifts, or are based on different root sequences but using the same cyclic shift.
Optionally, in PBCH dedicated demodulation reference signals sent N times within one PBCH information update period of the same cell, each PBCH dedicated demodulation reference signal sent each time uses a corresponding beam, and the PBCH dedicated demodulation reference signals sent N times are in one-to-one correspondence with the N beam indexes; alternatively, the first and second electrodes may be,
in the PBCH exclusive demodulation reference signals sent for N times in one PBCH information updating period of the same cell, the PBCH exclusive demodulation reference signal sent for each time uses one corresponding radio frame, and the PBCH exclusive demodulation reference signals sent for N times are in one-to-one correspondence with indexes of N radio frames.
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:
a generating module configured to generate a PBCH-specific demodulation reference signal for transmission on a PBCH;
a sending module, configured to send the PBCH dedicated demodulation reference signal on a PBCH, where the PBCH dedicated demodulation reference signals of different cells on the same time domain occupy different frequency domain resources and/or correspond to different signal sequences.
Optionally, PBCH-specific demodulation reference signals of different cells differ in at least one of the following ways:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, the sending module is specifically configured to: transmitting PBCH-specific demodulation reference signals N times in a PBCH information updating period, wherein N is an integer greater than or equal to 1, and the PBCH-specific demodulation reference signals transmitted N times in the same cell are different in at least one of the following aspects:
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, in PBCH dedicated demodulation reference signals sent N times within one PBCH information update period of the same cell, each PBCH dedicated demodulation reference signal sent each time uses a corresponding beam, and the PBCH dedicated demodulation reference signals sent N times are in one-to-one correspondence with the N beam indexes; alternatively, the first and second electrodes may be,
in the PBCH exclusive demodulation reference signals sent for N times in one PBCH information updating period of the same cell, the PBCH exclusive demodulation reference signal sent for each time uses one corresponding radio frame, and the PBCH exclusive demodulation reference signals sent for N times are in one-to-one correspondence with indexes of N radio frames.
In a fourth aspect, a terminal is provided, including:
a receiving module, configured to receive a PBCH dedicated demodulation reference signal, where the PBCH dedicated demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or correspond to different signal sequences;
and the channel estimation module is used for carrying out channel estimation according to the PBCH exclusive demodulation reference signal.
Optionally, PBCH-specific demodulation reference signals of different cells differ in at least one of the following ways:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, the PBCH-specific demodulation reference signals transmitted N times within one PBCH information update period of the same cell differ in at least one of the following ways:
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, in PBCH dedicated demodulation reference signals sent N times within one PBCH information update period of the same cell, each PBCH dedicated demodulation reference signal sent each time uses a corresponding beam, and the PBCH dedicated demodulation reference signals sent N times are in one-to-one correspondence with the N beam indexes; alternatively, the first and second electrodes may be,
in the PBCH exclusive demodulation reference signals sent for N times in one PBCH information updating period of the same cell, the PBCH exclusive demodulation reference signal sent for each time uses one corresponding radio frame, and the PBCH exclusive demodulation reference signals sent for N times are in one-to-one correspondence with indexes of N radio frames.
In a fifth aspect, a communication apparatus 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 execute the method provided by any of the possible schemes in the first aspect.
In a sixth aspect, a communication apparatus 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 execute the method provided by any of the above possible schemes of the second aspect.
In a seventh aspect, there is provided a computer storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any one of the possible aspects of the first aspect.
In an eighth aspect, a computer storage medium is provided, the computer storage medium storing computer-executable instructions for causing the computer to perform the method of any one of the possible aspects of the second aspect.
In the above embodiments, the network device generates the reference signal for transmission on the PBCH, and transmits the reference signal on the PBCH. The reference signals of different cells occupy different frequency domain resources and/or correspond to different signal sequences in the same time domain, so that the reference signals can be transmitted on the PBCH, and the interference of the PBCH among the cells can be further reduced.
Drawings
FIG. 1 is a schematic diagram of a network architecture suitable for use in embodiments of the present application;
fig. 2A and fig. 2B are schematic diagrams of PBCH dedicated modulation reference signal resources provided in scheme 1 in the embodiment of the present application;
fig. 2C is a schematic diagram of PBCH dedicated modulation reference signal resources provided in embodiment 2 of the present application;
fig. 3A and fig. 3B are schematic diagrams of PBCH dedicated modulation reference signal resources provided in scheme 3 of the present application;
fig. 3C is a schematic diagram of PBCH dedicated modulation reference signal resources provided in embodiment 4 of the present application;
fig. 4A and fig. 4B are schematic diagrams of PBCH dedicated modulation reference signal resources provided in scheme 5 in the embodiment of the present application;
fig. 4C is a schematic diagram of PBCH dedicated modulation reference signal resources provided in embodiment 6 of the present application;
fig. 5A and 5B are schematic diagrams of PBCH dedicated modulation reference signal resources provided in scheme 7 in the embodiment of the present application;
fig. 5C is a schematic diagram of PBCH dedicated modulation reference signal resources provided in 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 application;
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 embodiment of the application provides a transmission method and a device based on the method for reference signals transmitted on PBCH, wherein the device comprises network equipment and a terminal. The network device sends the reference signal designed in the embodiment of the application, and the terminal can utilize the reference signal to realize PBCH channel estimation. In the embodiment of the application, through the design of the reference signal, the special demodulation reference signals of the PBCH of different cells (such as adjacent cells) in the same time domain are distinguished, so that the problem of PBCH interference among different cells can be solved, the detection and demodulation reliability of the PBCH can be improved, the system signaling overhead can be reduced, and the transmission efficiency of the system can be improved. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
The embodiment of the application can be applied to a 3GPP 5G NR system or an evolution system thereof.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
Fig. 1 schematically 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 in an access network, and a terminal 30. The terminal 30 communicates with the access node 10 via a wireless connection, of which only one access node and one terminal are shown for clarity. The access node 10 is connected to a Core Network (CN), and devices in the core network may be divided into a Control Plane (CP) device 201 and a User Plane (UP) device 202, where the Control Plane device may also be referred to as a Control Plane network element and the User Plane device may also be referred to as a User Plane network element.
It should be noted that the control plane device and the user plane device are only names, and the names themselves do not limit the devices. For example, it is also possible that the control plane device is replaced by a "control plane entity" or other name. The control plane device may correspond to an entity that includes functions other than the control plane function. It is also possible that the user plane device is replaced by a "user plane entity" or other name, and that the user plane device may correspond to an entity that includes other functionality in addition to the user plane functionality. The description is unified here, and will not be repeated below.
A terminal, also referred to as 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, such as a handheld device with wireless connection function, a vehicle-mounted device, etc. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like.
An access node refers to a device accessing a core network, and may be, for example, a base station. When the access node is a base station, the base station specifically includes but is not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved Node B, or Home Node B, HNB), baseband Unit (BBU), new air interface Base Station (g NodeB, gNB), transmission point (TRP), Transmission Point (TP), mobile switching center, and the like.
The network architecture described in the embodiment of the present application is for more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation to the technical solution provided in the embodiment of the present application, and it is known by a person skilled in the art that as the network architecture evolves, the technical solution provided in the embodiment of the present application is also 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.
In the embodiment of the present application, the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The solutions provided by the embodiments of the present application will be described in more detail below with reference to the accompanying drawings.
In this embodiment, 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. The following embodiments are described by taking the example of transmitting dedicated demodulation reference signals on PBCH, which can also be expressed as PBCH-dedicated demodulation reference signals.
In the embodiment of the present application, a PBCH-specific modulated reference signal sent by a network device may be generated by cyclic shift with a specific sequence as a base sequence (i.e., a base sequence). For example, the network device may generate a sequence of PBCH-specific modulation reference signals of cell 1 with the first specific sequence as a base sequence, and need to generate a sequence of PBCH-specific modulation reference signals of cell 2 with the second specific sequence as a base; for another example, the network device may use the first specific sequence as a base sequence, perform a first mode cyclic shift on the base sequence to obtain a sequence of the PBCH-specific demodulation reference signal of the cell 1, and perform a second mode cyclic shift on the base sequence to obtain a sequence of the PBCH-specific demodulation reference signal of the cell 2. The first specific sequence and the second specific sequence are not the same, and the first mode cyclic shift and the second mode cyclic shift are not the same in shift direction and/or shift bit number, for example, the first mode cyclic shift refers to a left shift by one bit, the second mode cyclic shift refers to a left shift by two bits, and for example, the first mode cyclic shift refers to a left shift by one bit, and the second mode cyclic shift refers to a right shift by one bit.
The specific sequence used to generate the PBCH-specific demodulation reference signal sequence may be selected from sequences with good auto-correlation, low cross-correlation, and low Peak to Average Power Ratio (PAPR), such as ZC sequences with the above properties. The ZC sequence may be generated by cyclic shifting a base sequence, or may be generated by performing DFT (Discrete Fourier Transform) on the ZC sequence and then performing IFFT (Inverse Fast Fourier Transform) on the ZC sequence, using the characteristic that DFT is still the ZC sequence. Of course, the specific sequence used for generating the PBCH-specific demodulation reference signal sequence may also be other types of sequences or sequences generated in other manners, which is not limited in this application.
In the embodiment of the present application, a sequence of a PBCH dedicated demodulation reference signal is a ZC sequence. An expression for a ZC sequence is given below:
Figure BDA0001324570320000101
wherein the content of the first and second substances,
Figure BDA0001324570320000102
the length of the demodulation reference signal required for PBCH, q is the root of the base sequence.
In this embodiment of the present application, in order to distinguish dedicated demodulation reference signals for PBCH of different cells (for example, adjacent cells) to reduce interference of PBCH of different cells, in this embodiment of the present application, dedicated demodulation reference signals for PBCH of different cells occupy different frequency domain resources in the same time domain, or correspond to different signal sequences, or occupy different frequency domain resources and correspond to different signal sequences.
In particular, PBCH-specific demodulation reference signals of different cells differ in the same time domain at least in one of the following aspects:
-PBCH specific demodulation reference signals occupy different frequency domain locations. For example, the cell 1 and the cell 2 are adjacent cells, and a Physical Resource Block (PRB) occupied by the PBCH dedicated demodulation reference signal of the cell 1 in the frequency domain is different from a PRB occupied by the PBCH dedicated demodulation reference signal of the cell 2 in the frequency domain. 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. Alternatively, the frequency domain location occupied by the PBCH-specific demodulation reference signal of one cell may be predetermined.
-the root sequences used for generating PBCH-specific demodulation reference signals are different. For example, the cell 1 and the cell 2 are neighboring cells, the PBCH-specific demodulation reference signal of the cell 1 is generated by using a first ZC sequence as a root sequence, and the PBCH-specific demodulation reference signal of the cell 2 is generated by using a second ZC sequence different from the first ZC sequence as a root sequence. Since the PBCH-specific demodulation reference signal sequence of cell 1 is different from the PBCH-specific demodulation reference signal sequence of cell 2, the PBCH interference of cell 1 and cell 2 can be reduced. Alternatively, the root sequence of the PBCH-specific demodulation reference signal of one cell may be agreed in advance.
-the cyclic shifts used in generating PBCH-specific demodulation reference signals based on the root sequence are different. For example, the cell 1 and the cell 2 are adjacent cells, the PBCH-specific demodulation reference signal of the cell 1 is generated by using a certain ZC sequence as a root sequence and shifting the ZC sequence to the right by one bit, and the PBCH-specific demodulation reference signal of the cell 2 is generated by using the ZC sequence as a root sequence and shifting the ZC sequence to the left by one bit. Since the PBCH-specific demodulation reference signal sequence of cell 1 is different from the PBCH-specific demodulation reference signal sequence of cell 2, the PBCH interference of cell 1 and cell 2 can be reduced. Alternatively, the cyclic shift used by the PBCH-specific demodulation reference signal of one cell may be agreed in advance.
The system information transmitted on PBCH may be updated at set time intervals, which are referred to as PBCH information update periods. Within one PBCH information update period, PBCH information may be repeatedly transmitted multiple times at set time intervals. For example, in the 4G system, the PBCH update period is 40ms, the PBCH is transmitted every 10ms in a 40ms period, and the PBCH information (i.e., the system information transmitted through the PBCH, such as MIB) transmitted in one 40ms period is the same but is distinguished by different Redundancy Versions (RVs).
Optionally, in order to distinguish PBCH signals sent by the same cell at different time intervals within one PBCH information update period, in this embodiment of the present application, PBCH-specific demodulation reference signals sent by the same cell N times within one PBCH information update period are different at least in one of the following:
-PBCH specific demodulation reference signals occupy different frequency domain locations. For example, within one PBCH information update period, PRBs occupied by PBCH-specific demodulation reference signals transmitted twice in adjacent frequency domains are different. Since the PBCH dedicated demodulation reference signals transmitted at different times occupy different frequency domain resources, the PBCH or PBCH dedicated demodulation reference signals transmitted at different times can be distinguished. Alternatively, the frequency domain location occupied by the PBCH-specific demodulation reference signal of one cell may be predetermined.
The root sequences used to generate the demodulation reference signals are different. For example, in one PBCH information update period, PBCH-specific demodulation reference signals occur for cell 1N times, and PBCH-specific demodulation reference signal sequences transmitted at different times are generated based on different root sequences. In this way, for the same cell, within one PBCH information updating period, the sequences of PBCH-specific demodulation reference signals transmitted each time are different.
-the cyclic shifts used in generating the demodulation reference signal based on the root sequence are different. For example, within one PBCH information update period, PBCH-specific demodulation reference signals occur N times for cell 1, and PBCH-specific demodulation reference signals transmitted at different times are all generated based on the same root sequence but with different cyclic shifts. In this way, for the same cell, within one PBCH information updating period, the sequences of PBCH-specific demodulation reference signals transmitted each time are different.
When the above-described scheme of the embodiment of the present application is applied to a 3GPP 5G NR system, in a possible scheme, a PBCH information update period is 80ms, a PBCH is sent every 20ms in one PBCH information update period, and PBCH information (i.e., system information sent by a PBCH, such as MIB) sent in one PBCH information update period is the same but is distinguished by different Redundancy versions (rdnancy versions, RVs).
According to the design principle of PBCH-specific demodulation reference signals, some possible schemes for application in the 3GPP 5G NR system are exemplarily given in the embodiments of the present application. In the 3GPP 5G NR system, the PBCH information update period is 80ms, and PBCH is transmitted once every 20ms within one PBCH information update period. PBCH occupies 2 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, 288 subcarriers (i.e., 24 PRBs) in the Frequency domain, and PBCH-specific demodulation reference Signal (DMRS) is transmitted on the time-Frequency resources occupied by PBCH, which is referred to as NR PBCH DMRS or PBCH DMRS in the following examples.
In the following examples shown in fig. 2A to 5C, the value of q is used to distinguish root sequences, the same value indicates that the root sequences are the same, the different values indicate that the root sequences are different, and the value of q is identified in a block that identifies the time-frequency resource occupied by the PBCH DMRS. The values of Vshift are used for distinguishing cyclic shifts, the same values mean the same cyclic shifts, and different values mean different cyclic shifts.
Scheme 1
And the NR PBCH DMRS sequences of different cells are generated according to different root sequences, occupy the same frequency domain position and adopt the same cyclic shift. For the same cell, in the NR PBCH information update period, NR PBCH DMRS sequences are generated based on different root sequences but with the same cyclic shift, so that different RV versions are distinguished by different root sequences.
Fig. 2A exemplarily shows the time-frequency resource positions occupied by the NRPBCH DMRSs of cell 1, cell 2, cell 3, the used root sequences and the employed cyclic shifts on 2 OFDM symbols occupied by PBCH. As shown in fig. 2A, the frequency domain resources occupied by the NR PBCH DMRSs of the 3 cells are the same, the NR PBCH DMRSs of the 3 cells are generated based on different root sequences (shown as different q values in the figure), and the NR PBCH DMRSs of the 3 cells use the same cyclic shift (shown as the same padding pattern in the figure).
Fig. 2B exemplarily shows time-frequency resource positions occupied by NR PBCH DMRS, used root sequences and adopted cyclic shifts in PBCH repeatedly transmitted multiple times within one PBCH information update period in cell 1 and cell 2. For the same cell, a network device (e.g., a base station) repeatedly transmits PBCH every 20ms within one PBCH information update period. In each transmitted PBCH, the NR PBCH DMRSs of the same cell occupy the same frequency domain resource and use the same cyclic shift (shown as the same padding pattern in the figure). In one PBCH information updating period, the NR PBCH DMRS sequence transmitted in the cell at a time is generated based on a different root sequence (shown as a different q value in the figure).
In the same time domain (for example, at a position of 20 ms), 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 the NR PBCH DMRSs of cell 1 and cell 2 occupy the same frequency domain position and use the same cyclic shift (shown as the same padding manner in the figure).
Scheme 2
For different cells, as in scheme 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 position and use the same cyclic shift. Unlike scheme 1, for the same cell, in the NR PBCH information update period, NR PBCH DMRS sequences are 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 positions occupied by NR PBCH DMRSs, the used root sequences and the adopted cyclic shifts in PBCH repeatedly transmitted multiple times within one PBCH information update period in cell 1 and cell 2. For the same cell, a network device (e.g., a base station) repeatedly transmits PBCH every 20ms within one PBCH information update period. In each transmitted PBCH, NR PBCH DMRS of the same cell occupy the same frequency domain resource, and the NR PBCH DMRS sequences are generated according to the same root sequence (shown as the same q value in the figure) but adopt different cyclic shifts (shown as different filling modes in the figure).
In the same time domain (for example, 20ms location), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated based on different root sequences (indicated as different q values in the figure), and the NR PBCH DMRSs of cell 1 and cell 2 occupy the same frequency domain location and use the same cyclic shift (indicated as the same padding manner in the figure).
Scheme 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, in the NR PBCH information update period, NR PBCH DMRS sequences are generated based on different root sequences but with the same cyclic shift, thereby distinguishing different RV versions.
Fig. 3A exemplarily shows the time-frequency resource positions occupied by NR PBCH DMRSs of different cells, the used root sequences and the employed cyclic shifts over 2 OFDM symbols occupied by PBCH. As shown in fig. 3A, the frequency domain resources occupied by the NR PBCH DMRSs of cell 1, cell 2, and cell 3 are the same, the NR PBCH DMRS sequences of these 3 cells are generated based on the same root sequence (shown as the same q value in the figure), and the NR PBCH DMRSs of these 3 cells employ different cyclic shifts (shown as different padding in the figure).
Fig. 3B exemplarily shows time-frequency resource positions occupied by NR PBCH DMRS, used root sequences and adopted cyclic shifts in PBCH repeatedly transmitted multiple times within one PBCH information update period in cell 1 and cell 2. For the same cell, a network device (e.g., a base station) repeatedly transmits PBCH every 20ms within one PBCH information update period. In each transmitted PBCH, the NR PBCH DMRSs of the same cell occupy the same frequency domain resource and use the same cyclic shift (shown as the same padding pattern in the figure). In one PBCH information updating period, the NR PBCH DMRS sequence transmitted in the cell at a time is generated based on a different root sequence (shown as a different q value in the figure).
In the same time domain (for example, 20 ms), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated from the same root sequence (shown as the same q value in the figure), and the NR PBCH DMRSs of cell 1 and cell 2 occupy the same frequency domain position and use different cyclic shifts (shown as the same padding manner in the figure).
Scheme 4
For different cells, as in scheme 3, the NR PBCH DMRS sequences for different cells are generated from the same root sequence, and the NR PBCH DMRSs for different cells occupy the same frequency domain location but employ different cyclic shifts. For the same cell, unlike scheme 3, in the NR PBCH information update period, the NR PBCH DMRS sequences are generated based on the same root sequence but with different cyclic shifts.
Fig. 3C exemplarily shows the time-frequency resource positions occupied by NR PBCH DMRS, the used root sequences and the adopted cyclic shifts in PBCH repeatedly transmitted multiple times within one PBCH information update period in cell 1 and cell 2. For the same cell, a network device (e.g., a base station) repeatedly transmits PBCH every 20ms within one PBCH information update period. In each transmitted PBCH, NR PBCH DMRS of the same cell occupy the same frequency domain resource, and the NR PBCH DMRS sequences are generated according to the same root sequence (shown as the same q value in the figure) but adopt different cyclic shifts (shown as different filling modes in the figure).
In the same time domain (for example, at a position of 20 ms), the NR PBCH DMRS sequences of cell 1 and cell 2 use different cyclic shifts (shown as different padding), and the NR PBCH DMRSs of cell 1 and cell 2 occupy the same frequency domain position and are based on the same root sequence (shown as the same q value in the figure).
Scheme 5
For different cells, the NR PBCH DMRS sequences of different cells are generated according to different root sequences, and the NR PBCH DMRSs of different cells occupy different frequency domain positions but adopt the same cyclic shift. For the same cell, in the NRPBCH information updating period, the NR PBCH DMRS sequences are generated based on different root sequences but by adopting the same cyclic shift, so that different RV versions are distinguished.
Fig. 4A exemplarily shows the time-frequency resource positions occupied by NR PBCH DMRSs of different cells, the used root sequences and the employed cyclic shifts over 2 OFDM symbols occupied by PBCH. As shown in fig. 4A, the frequency domain resources occupied by the NR PBCH DMRSs of cell 1, cell 2, and cell 3 are different, the NR PBCH DMRSs of these 3 cells are generated based on different root sequences (shown as different q values in the figure), and the NR PBCH DMRSs of these 3 cells use the same cyclic shift (shown as the same padding in the figure).
Fig. 4B exemplarily shows time-frequency resource positions occupied by NR PBCH DMRS, used root sequences, and adopted cyclic shifts in PBCH repeatedly transmitted multiple times within one PBCH information update period in cell 1 and cell 2. For the same cell, a network device (e.g., a base station) repeatedly transmits PBCH every 20ms within one PBCH information update period. In each transmitted PBCH, the NR PBCH DMRSs of the same cell occupy the same frequency domain resource and use the same cyclic shift (shown as the same padding pattern in the figure). In one PBCH information updating period, the NR PBCH DMRS sequence transmitted in the cell at a time is generated based on a different root sequence (shown as a different q value in the figure).
In the same time domain (for example, 20ms position), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated from different root sequences (indicated as different q values in the figure), and the NR PBCH DMRSs of cell 1 and cell 2 occupy different frequency domain positions but use the same cyclic shift (indicated as the same padding pattern in the figure).
Scheme 6
For different cells, as in scheme 5, the NR PBCH DMRS sequences for different cells are generated from the same root sequence, and the NR PBCH DMRSs for different cells occupy different frequency domain locations but use the same cyclic shift. For the same cell, unlike scheme 5, in the NR PBCH information update period, the NR PBCH DMRS sequences are generated based on the same root sequence but with different cyclic shifts.
Fig. 4C exemplarily shows the time-frequency resource positions occupied by NR PBCH DMRSs, the used root sequences and the adopted cyclic shifts in PBCH repeatedly transmitted multiple times within one PBCH information update period in cell 1 and cell 2. For the same cell, a network device (e.g., a base station) repeatedly transmits PBCH every 20ms within one PBCH information update period. In each transmitted PBCH, NR PBCH DMRS of the same cell occupy the same frequency domain resource, and the NR PBCH DMRS sequences are generated according to the same root sequence (shown as the same q value in the figure) but adopt different cyclic shifts (shown as different filling modes in the figure).
In the same time domain (for example, 20ms position), the NR PBCH DMRS sequences of cell 1 and cell 2 use the same cyclic shift (shown as the same padding pattern in the figure), and the NR PBCH DMRSs of cell 1 and cell 2 occupy different frequency domain positions and are based on different root sequences (shown as different q values in the figure).
Scheme 7
For different cells, the NR PBCH DMRS sequences of different cells are generated according to the same root sequence, and the NR PBCH DMRS of different cells occupy different frequency domain positions and adopt different cyclic shifts. For the same cell, in the NRPBCH information updating period, the NR PBCH DMRS sequences are generated based on different root sequences but by adopting the same cyclic shift, so that different RV versions are distinguished.
Fig. 5A exemplarily shows the time-frequency resource locations occupied by NR PBCH DMRSs of different cells, the used root sequences and the employed cyclic shifts over 2 OFDM symbols occupied by PBCH. As shown in fig. 5A, the frequency domain resources occupied by the NR PBCH DMRSs of the cells 1, 2, and 3 are different, and the NR PBCH DMRS sequences of these 3 cells are generated based on the same root sequence (shown as different q values in the figure), but the same cyclic shift (shown as the same padding manner in the figure) is adopted.
Fig. 5B exemplarily shows the time-frequency resource positions occupied by NR PBCH DMRS, the used root sequences and the adopted cyclic shifts in PBCH repeatedly transmitted multiple times within one PBCH information update period in cell 1 and cell 2. For the same cell, a network device (e.g., a base station) repeatedly transmits PBCH every 20ms within one PBCH information update period. In each PBCH transmitted, the NR PBCH DMRSs of the same cell occupy the same frequency domain resource, and use the same cyclic shift (shown as the same padding method in the figure). In one PBCH information updating period, the NR PBCH DMRS sequence transmitted in the cell at a time is generated based on a different root sequence (shown as a different q value in the figure).
In the same time domain (for example, 20ms position), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated from the same root sequence (shown as the same q value in the figure), and different cyclic shifts (shown as different padding patterns in the figure) are adopted, and the NR PBCH DMRSs of cell 1 and cell 2 occupy different frequency domain positions.
Scheme 8
For different cells, as in 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 use different cyclic shifts. For the same cell, unlike scheme 7, in the NR PBCH information update period, the NR PBCH DMRS sequences are generated based on the same root sequence but with different cyclic shifts.
Fig. 5C exemplarily shows the time-frequency resource positions occupied by NR PBCH DMRS, the used root sequences and the adopted cyclic shifts in PBCH repeatedly transmitted multiple times within one PBCH information update period in cell 1 and cell 2. For the same cell, a network device (e.g., a base station) repeatedly transmits PBCH every 20ms within one PBCH information update period. In each transmitted PBCH, NR PBCH DMRS of the same cell occupy the same frequency domain resource, and the NR PBCH DMRS sequences are generated according to the same root sequence (shown as the same q value in the figure) but adopt different cyclic shifts (shown as different filling modes in the figure).
In the same time domain (for example, 20ms position), the NR PBCH DMRS sequences of cell 1 and cell 2 are generated from the same root sequence (shown as the same q value in the figure), and different cyclic shifts (shown as different padding patterns in the figure) are adopted, and the NR PBCH DMRSs of cell 1 and cell 2 occupy different frequency domain positions.
In the above example, the PBCH occupies 2 OFDM symbols and 288 subcarriers, and the number of symbols occupied by the PBCH in the time domain and the number of subcarriers occupied by the PBCH in the frequency domain are not limited in the embodiment of the present application.
Fig. 6 exemplarily illustrates a PBCH-specific demodulation reference signal transmission procedure provided in an embodiment of the present application, and as shown in the figure, the procedure may include:
s601: a network device (e.g., a base station) generates PBCH-specific demodulation reference signals for transmission on PBCH.
In particular, in this step, a network device (e.g., a base station) may generate a sequence for a PBCH-specific demodulation reference signal transmitted on the PBCH according to the description of the foregoing embodiments. The PBCH-specific demodulation reference signal may be 5G NR PBCH mrs.
S602: a network device (e.g., a base station) transmits the generated PBCH-specific demodulation reference signals on PBCH. The dedicated demodulation reference signals of PBCH 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 manner of the PBCH-specific demodulation reference signal transmitted by the network device (e.g., the base station) may be as described in the foregoing embodiments and are not repeated here.
S603: the terminal receives a PBCH-specific demodulation reference signal sent by a network device (e.g., a base station) on the PBCH, and may further perform 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 PBCH-specific demodulation reference signals repeatedly sent multiple times within one PBCH information update period, and perform channel estimation based on the demodulated signals.
Alternatively, a network device (e.g., a base station) may transmit PBCH-specific demodulation reference signals using corresponding beams, use a corresponding beam for each transmitted PBCH within one PBCH information update period, and may implicitly indicate the used beams, such as indicating the index of the beams, by the transmitted PBCH-specific demodulation reference signals.
Alternatively, a network device (e.g., a base station) may transmit a PBCH-specific demodulation reference signal using a corresponding radio frame, and each PBCH transmitted in one PBCH information update period uses a corresponding radio frame, and may implicitly indicate the used radio frame by the transmitted PBCH-specific demodulation reference signal, such as indicating an index or frame number of the radio frame.
As can be seen from the above description, in the embodiment of the present application, a network device (e.g., a base station) generates a PBCH-specific demodulation reference signal for sending on a PBCH, and sends the PBCH-specific demodulation reference signal on the PBCH, where reference signals of different cells occupy different frequency domain resources and/or correspond to different signal sequences in the same time domain, so that the PBCH detection demodulation reliability can be improved, the system signaling overhead can be reduced, and the system transmission efficiency can be improved.
Based on the same technical concept, embodiments of the present application further provide a network device (e.g., a base station), where the network device may implement the process at the network device (e.g., the base station) side in the foregoing embodiments.
Fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown, the network device may include: a generating module 701 and a sending module 702, wherein:
the generating module 701 is configured to generate a PBCH-specific demodulation reference signal for transmission on a PBCH; the sending module 702 is configured to send the PBCH-specific demodulation reference signal on a 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, PBCH-specific demodulation reference signals of different cells differ in at least one of the following ways:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, the sending module 702 may be specifically configured to: transmitting PBCH-specific demodulation reference signals N times in a PBCH information updating period, wherein N is an integer greater than or equal to 1, and the PBCH-specific demodulation reference signals transmitted N times in the same cell are different in at least one of the following aspects:
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, in PBCH dedicated demodulation reference signals sent N times within one PBCH information update period of the same cell, each PBCH dedicated demodulation reference signal sent each time uses a corresponding beam, and the PBCH dedicated demodulation reference signals sent N times are in one-to-one correspondence with the N beam indexes; or, in PBCH dedicated demodulation reference signals sent N times within one PBCH information update period of the same cell, the PBCH dedicated demodulation reference signal sent each time uses a corresponding radio frame, and the PBCH dedicated demodulation reference signals sent N times are in one-to-one correspondence with the indexes of the N radio frames.
Based on the same technical concept, the embodiment of the application also provides a terminal, and the terminal can realize the flow of the terminal side in the embodiment.
Referring to fig. 8, a schematic structural diagram of a terminal provided in the embodiment of the present application is shown. As shown, the terminal may include: a receiving module 801 and a channel estimation module 802, wherein:
the receiving module 801 is configured to receive a PBCH dedicated demodulation reference signal, where the PBCH dedicated 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 perform channel estimation according to the PBCH-specific demodulation reference signal.
Optionally, PBCH-specific demodulation reference signals of different cells differ in at least one of the following ways:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, the PBCH-specific demodulation reference signals transmitted N times within one PBCH information update period of the same cell differ in at least one of the following ways:
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
Optionally, in PBCH dedicated demodulation reference signals sent N times within one PBCH information update period of the same cell, each PBCH dedicated demodulation reference signal sent each time uses a corresponding beam, and the PBCH dedicated demodulation reference signals sent N times are in one-to-one correspondence with the N beam indexes; or, in PBCH dedicated demodulation reference signals sent N times within one PBCH information update period of the same cell, the PBCH dedicated demodulation reference signal sent each time uses a corresponding radio frame, and the PBCH dedicated demodulation reference signals sent N times are in one-to-one correspondence with the indexes of the N radio frames.
Based on the same technical concept, embodiments of the present application further provide a network device (e.g., a base station), where the network device may implement the process at the network device (e.g., the base station) side in the foregoing embodiments.
Fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present application. As shown, the communication device may 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 may store data used by the processor 801 in performing operations. The transceiver 903 is used for receiving and transmitting data under the control of the processor 901.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 901, and various circuits, represented by memory 902, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations.
The process disclosed in the embodiment of the present invention may be applied to the processor 901, or implemented by the processor 901. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 901. The processor 901 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the signal processing flow in combination with the hardware thereof.
Specifically, the processor 901, configured to read the program in the memory 902, executes the following processes: generating a PBCH-specific demodulation reference signal for transmission on a PBCH; the PBCH-specific demodulation reference signals are transmitted on a PBCH through the transceiver 903, where the PBCH-specific demodulation reference signals of different cells on the same time domain occupy different frequency domain resources and/or correspond to different signal sequences. The specific implementation process of the above flow can be referred to the description of the foregoing embodiment, and is not repeated here.
Based on the same technical concept, the embodiment of the application also provides a terminal, and the terminal can realize the flow of the terminal side in the embodiment.
Referring to fig. 10, a schematic structural diagram of a terminal provided in the embodiment of the present application is shown. As shown, the terminal may 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 may store data used by the processor 801 in performing operations. The transceiver 1003 is used for receiving and transmitting data under the control of the processor 1001.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 1001, and various circuits, represented by the memory 1002, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 may store data used by the processor 1001 in performing operations.
The process disclosed in the embodiment of the present invention may be applied to the processor 1001, or implemented by the processor 1001. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1001. The processor 1001 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and completes the steps of the signal processing flow in combination with the hardware thereof.
Specifically, the processor 1001, configured to read a program in the memory 1002, executes the following processes: receiving a PBCH exclusive demodulation reference signal, wherein the PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain resources and/or correspond to different signal sequences; and performing channel estimation according to the PBCH exclusive demodulation reference signal. The specific implementation process of the above flow can be referred to the description of the foregoing embodiment, and is not repeated here.
Based on the same technical concept, the embodiment of the application also 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 procedure implemented by the network device as described in the foregoing embodiments.
Based on the same technical concept, the embodiment of the application also 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 procedure implemented by the terminal as described in the foregoing embodiments.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (16)

1. A method for transmitting a Physical Broadcast Channel (PBCH) -specific demodulation reference signal (DM-RS), comprising:
the network device generates a PBCH-specific demodulation reference signal for transmission on a PBCH;
the network equipment sends the PBCH exclusive demodulation reference signal on PBCH; the network device sends PBCH-specific demodulation reference signals N times in one PBCH information update period, where N is an integer greater than or equal to 1, where the PBCH-specific demodulation reference signals of different cells occupy different frequency domain resources and/or correspond to different signal sequences in the same time domain, and the PBCH-specific demodulation reference signals sent N times in the same cell 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;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
2. The method of claim 1, in which PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences, comprising:
the PBCH-specific demodulation reference signals of different cells differ in at least one of the following ways:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
3. The method of claim 1,
PBCH exclusive demodulation reference signals of different cells on 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 updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy the same frequency domain position, are based on the same root sequence and use different cyclic shifts; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain positions, are based on different root sequences and use the same cyclic shift; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain positions, are based on the same root sequence and use different cyclic shifts; in one PBCH information update period of the same cell, the PBCH-specific demodulation reference signals transmitted N times are based on the same root sequence but using different cyclic shifts, or are based on different root sequences but using the same cyclic shift.
4. The method of claim 1, wherein each transmitted PBCH-specific demodulation reference signal uses a corresponding one beam among PBCH-specific demodulation reference signals transmitted N times within one PBCH information update period of the same cell, the N times of transmitted PBCH-specific demodulation reference signals being in one-to-one correspondence with N beam indices; alternatively, the first and second electrodes may be,
in the PBCH exclusive demodulation reference signals sent for N times in one PBCH information updating period of the same cell, the PBCH exclusive demodulation reference signal sent for each time uses one corresponding radio frame, and the PBCH exclusive demodulation reference signals sent for N times are in one-to-one correspondence with indexes of N radio frames.
5. The method of claim 1, wherein the sequences corresponding to the PBCH-specific demodulation reference signals are ZC sequences.
6. A method for transmitting a Physical Broadcast Channel (PBCH) -specific demodulation reference signal (DM-RS), comprising:
a terminal receives a PBCH exclusive demodulation reference signal; the terminal receives PBCH-specific demodulation reference signals sent N times in a PBCH information update period, where N is an integer greater than or equal to 1, where the PBCH-specific demodulation reference signals of different cells occupy different frequency domain resources and/or correspond to different signal sequences in the same time domain, and the PBCH-specific demodulation reference signals N times in a PBCH information update period of the same cell 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;
cyclic shift used when generating PBCH-specific demodulation reference signals based on the root sequence;
and the terminal carries out channel estimation according to the special demodulation reference signal of the PBCH.
7. The method of claim 6, in which PBCH-specific demodulation reference signals of different cells in the same time domain occupy different frequency domain resources and/or corresponding different signal sequences, comprising:
the PBCH-specific demodulation reference signals of different cells differ in at least one of the following ways:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
8. The method of claim 6,
PBCH exclusive demodulation reference signals of different cells on 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 updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy the same frequency domain position, are based on the same root sequence and use different cyclic shifts; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain positions, are based on different root sequences and use the same cyclic shift; in a PBCH information updating period of the same cell, the PBCH-specific demodulation reference signals sent for N times are based on the same root sequence but use different cyclic shifts, or are based on different root sequences but use the same cyclic shift; alternatively, the first and second electrodes may be,
PBCH exclusive demodulation reference signals of different cells on the same time domain occupy different frequency domain positions, are based on the same root sequence and use different cyclic shifts; in one PBCH information update period of the same cell, the PBCH-specific demodulation reference signals transmitted N times are based on the same root sequence but using different cyclic shifts, or are based on different root sequences but using the same cyclic shift.
9. The method of claim 6, wherein each transmitted PBCH-specific demodulation reference signal uses a corresponding one beam among N transmitted PBCH-specific demodulation reference signals within one PBCH information update period of the same cell, the N transmitted PBCH-specific demodulation reference signals being in one-to-one correspondence with N beam indices; alternatively, the first and second electrodes may be,
in the PBCH exclusive demodulation reference signals sent for N times in one PBCH information updating period of the same cell, the PBCH exclusive demodulation reference signal sent for each time uses one corresponding radio frame, and the PBCH exclusive demodulation reference signals sent for N times are in one-to-one correspondence with indexes of N radio frames.
10. The method of claim 6, wherein the sequences corresponding to the PBCH-specific demodulation reference signals are ZC sequences.
11. A network device, comprising:
a generating module configured to generate a PBCH-specific demodulation reference signal for transmission on a PBCH;
a sending module, configured to send the PBCH dedicated demodulation reference signal on a PBCH, where the PBCH dedicated demodulation reference signals of different cells on the same time domain occupy different frequency domain resources and/or correspond to different signal sequences;
the sending module is specifically configured to: transmitting PBCH-specific demodulation reference signals N times in a PBCH information updating period, wherein N is an integer greater than or equal to 1, and the PBCH-specific demodulation reference signals transmitted N times in the same cell 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;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
12. The network device of claim 11, wherein PBCH-specific demodulation reference signals of different cells differ in at least one of:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
13. The network device of claim 11, wherein PBCH-specific demodulation reference signals transmitted N times within one PBCH information update period of the same cell use a corresponding one beam for each PBCH-specific demodulation reference signal transmitted N times, the PBCH-specific demodulation reference signals transmitted N times being in one-to-one correspondence with N beam indices; alternatively, the first and second electrodes may be,
in the PBCH exclusive demodulation reference signals sent for N times in one PBCH information updating period of the same cell, the PBCH exclusive demodulation reference signal sent for each time uses one corresponding radio frame, and the PBCH exclusive demodulation reference signals sent for N times are in one-to-one correspondence with indexes of N radio frames.
14. A terminal, comprising:
a receiving module, configured to receive a PBCH dedicated demodulation reference signal; the terminal receives PBCH-specific demodulation reference signals sent N times in a PBCH information update period, where N is an integer greater than or equal to 1, where the PBCH-specific demodulation reference signals of different cells occupy different frequency domain resources and/or correspond to different signal sequences in the same time domain, and the PBCH-specific demodulation reference signals N times in a PBCH information update period of the same cell 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;
cyclic shift used when generating PBCH-specific demodulation reference signals based on the root sequence;
and the channel estimation module is used for carrying out channel estimation according to the PBCH exclusive demodulation reference signal.
15. The terminal of claim 14, wherein PBCH-specific demodulation reference signals of different cells differ in at least one of:
the frequency domain position occupied by the PBCH exclusive demodulation reference signal;
a root sequence for generating a PBCH-specific demodulation reference signal;
cyclic shifts used in generating PBCH-specific demodulation reference signals based on a root sequence.
16. The terminal of claim 14, wherein PBCH-specific demodulation reference signals transmitted N times in one PBCH information update period of the same cell use one beam for each PBCH-specific demodulation reference signal transmitted N times, and the PBCH-specific demodulation reference signals transmitted N times are in one-to-one correspondence with N beam indices; alternatively, the first and second electrodes may be,
in the PBCH exclusive demodulation reference signals sent for N times in one PBCH information updating period of the same cell, the PBCH exclusive demodulation reference signal sent for each time uses one corresponding radio frame, and the PBCH exclusive demodulation reference signals sent for N times are in one-to-one correspondence with indexes of N radio frames.
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