CN112312331B - Physical broadcast channel and information transmission method and device - Google Patents
Physical broadcast channel and information transmission method and device Download PDFInfo
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- CN112312331B CN112312331B CN202011135104.5A CN202011135104A CN112312331B CN 112312331 B CN112312331 B CN 112312331B CN 202011135104 A CN202011135104 A CN 202011135104A CN 112312331 B CN112312331 B CN 112312331B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention discloses a physical broadcast channel and information transmission method and a device; the terminal replaces at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel with at least one subcarrier used for a terminal measurement reference signal, a terminal measurement synchronization signal block comprises the physical broadcast channel, and effective information carried by the physical broadcast channel and the reference signal are sent in time-frequency resources. The scheme can change part of information carried by a physical broadcast channel of the SSB measured by the terminal, and replace meaningless data carried by the physical broadcast channel with a reference signal for assisting the terminal to measure, so that the measurement result is more accurate.
Description
Technical Field
The invention relates to the technical field of physical broadcast channels, in particular to a physical broadcast channel and an information transmission method and device.
Background
Before the terminal communicates with the core network, it needs to search for a cell, find the cell where the terminal is located, synchronize with the cell, and receive and decode the necessary information for communication and normal operation with the cell. In the design of an NR (New Radio, New air interface) system, a PSS (Primary Synchronized Signal), an SSS (Secondary Synchronized Signal), and a PBCH (Physical Broadcast Channel) are combined to form an SSB (Synchronized Signal block) to realize communication with a cell and acquire necessary information. In the course of research and practice on the prior art, the inventors of the present invention found that, in such SSBs for terminal measurement, most of the data in the physical broadcast channel is meaningless, wasting resources, and affecting the terminal measurement accuracy.
Disclosure of Invention
The embodiment of the invention provides a physical broadcast channel information transmission method, which replaces meaningless data carried by an SSB block for terminal measurement with a reference signal for terminal measurement, so that the measurement degree of the terminal for measuring the SSB is more accurate.
The embodiment of the invention provides a physical broadcast channel information transmission method, which comprises the following steps:
replacing at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel with at least one subcarrier used for a terminal measurement reference signal, wherein a terminal measurement synchronization signal block comprises the physical broadcast channel;
and sending the effective information carried by the physical broadcast channel and the reference signal in time-frequency resources.
Optionally, in some embodiments of the present invention, the replacing at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel with at least one subcarrier used for a terminal to measure a reference signal includes:
storing effective information carried by the physical broadcast channel in a second resource block group in a centralized manner, wherein the information contained in the second resource block group is transmitted on a second symbol of the time-frequency resource corresponding to the physical broadcast channel;
storing the meaningless data in a first resource block group and a third resource block group, wherein information contained in the first resource block group is transmitted on a first symbol of the time-frequency resource corresponding to the physical broadcast channel, and information contained in the third resource block group is transmitted on a third symbol of the time-frequency resource corresponding to the physical broadcast channel;
and generating at least one subcarrier of the reference signal and replacing at least one atomic carrier.
Optionally, in some embodiments of the present invention, the generating at least one subcarrier of the reference signal and replacing at least one atomic carrier includes:
generating an initialization value of the reference signal by using symbol encoding of the time frequency resource, an index of the synchronization signal block and cell identity information of the synchronization signal block;
generating at least one subcarrier by using the initialization value;
replacing at least one of the atomic carriers with at least one of the sub-carriers.
Optionally, in some embodiments of the present invention, the generating an initialization value of the reference signal by using symbol coding of the time-frequency resource, an index of the synchronization signal block, and cell identity information of the synchronization signal block includes:
demodulating effective information carried by the physical broadcast channel;
acquiring an index of the synchronization signal block and cell identity information of the synchronization signal block, wherein the index and the cell number are obtained in the process of forming the synchronization signal block and demodulating;
and performing mixed operation of addition, multiplication, division and complementation on the symbol codes, the indexes and the cell identity information to generate an initialization value of the reference signal.
Optionally, in some embodiments of the present invention, the generating at least one subcarrier by using the initialization value includes:
acquiring the number of resource blocks occupied by the meaningless data;
multiplying the number of the resource blocks by the number of subcarriers contained in one resource block to obtain the total number of atomic carriers occupied by the meaningless data;
taking the total number of 0 to the atomic carriers as a parameter sequence for generating the sub-carrier sequence reference;
generating a random number sequence by utilizing a pseudo random number generation algorithm according to the initialization value;
acquiring a random number at a position twice the number of the reference parameter and a random number at a position added by the twice the number of the reference parameter from the random number sequence;
and generating at least one complex number as the subcarrier according to the random number at the position of the double number of the reference parameter and the random number at the position of the double number plus one of the reference parameter.
Optionally, in some embodiments of the present invention, the sending the effective information and the reference signal carried by the physical broadcast channel in the time-frequency resource includes:
defining a time frequency resource comprising a first symbol, a second symbol and a third symbol corresponding to the physical broadcast channel;
transmitting the effective information on a second symbol of the time frequency resource corresponding to the physical broadcast channel;
and transmitting the reference signal on a first symbol of the time frequency resource and a third symbol of the time frequency resource corresponding to the physical broadcast channel.
Correspondingly, an embodiment of the present invention further provides a physical broadcast channel, including:
a second resource block group, where the second resource block group includes effective information for searching for a cell search SSB and a DMRS demodulation reference signal, and information included in the second resource block group is transmitted on a second symbol of the time-frequency resource corresponding to the physical broadcast channel;
the first resource block group and the third resource block group contain reference signals, or the first resource block group and the third resource block group contain reference signals and meaningless data, information contained in the first resource block group is transmitted on a first symbol of time-frequency resources corresponding to the physical broadcast channel, and information contained in the third resource block group is transmitted on a third symbol of the time-frequency resources corresponding to the physical broadcast channel.
Correspondingly, an embodiment of the present invention further provides a physical broadcast channel information transmission apparatus, including:
a replacing unit, configured to replace at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel with at least one subcarrier of a reference signal used for terminal measurement;
and the sending unit is used for sending the effective information carried by the physical broadcast channel and the reference signal in time-frequency resources.
Correspondingly, the embodiment of the invention also provides terminal equipment, which comprises a memory and a processor; the memory stores an application program, and the processor is configured to execute the application program in the memory to perform an operation in the physical broadcast channel information transmission method according to any one of the embodiments of the present invention.
In addition, an embodiment of the present invention further provides a storage medium, where the storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor to perform the steps in the physical broadcast channel information transmission method according to any one of the embodiments of the present invention.
The terminal provided by the embodiment of the invention measures a physical broadcast channel in an SSB to bear most of meaningless data, the physical broadcast channel comprises a first resource block group, a second resource block group and a third resource block group, the terminal stores effective information borne by the physical broadcast channel in the second resource block group in a centralized manner, stores the meaningless data in the first resource block group and the third resource block group, generates an initialization value of a reference signal which is beneficial to the measurement of the terminal by using symbol coding of time-frequency resources, indexes of synchronous signal blocks and cell identity information of the synchronous signal blocks, generates at least one subcarrier by using the initialization value, replaces the meaningless data by the at least one subcarrier, and the measurement degree of the SSB measured by the terminal is more accurate by using the reference signal borne by the physical broadcast channel.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic representation of an SSB provided by an embodiment of the present invention;
fig. 2 is a flowchart of a method for transmitting physical broadcast channel information according to an embodiment of the present invention;
FIG. 3 is a diagram of an improved pre-terminal measuring the physical broadcast channel in the SSB according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the improved terminal measuring the physical broadcast channel in the SSB according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for transmitting physical broadcast channel information according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a physical broadcast channel and information transmission method and device. The application device can be integrated in a terminal, and the terminal can be a mobile phone, a tablet computer, a notebook computer and other equipment.
For example, in an NR system, there are two SSBs, one of which is used for cell search and the other is used for terminal measurement, as shown in fig. 1, each SSB includes NR-PSS, NR-SSS and NR-physical broadcast, where the NR-PSS, NR-SSS and NR-physical broadcast are time-division-multiplexed mapping relations, and occupy 4 consecutive OFDM symbols, and the NR-PSS is mapped before the NR-SSS, and the time-domain order relation is: NR-PSS-NR-physical broadcast-NR-SSS-NR-physical broadcast. When the terminal communicates with the network, the terminal obtains downlink synchronization and physical layer cell identity information of the cell by detecting the PSS and the SSS at specific positions, and then obtains necessary cell system information by receiving signals transmitted by a physical broadcast channel. In the SSB measured by the terminal, the physical broadcast channel has a lot of meaningless data, the terminal can generate a reference signal for terminal measurement by using the index of the SSB, the cell identity information of the SSB and the symbol coding of the time-frequency resource, and the meaningless data of the physical broadcast channel is replaced by the reference signal, thereby improving the measurement accuracy of the physical broadcast channel.
The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
The present embodiment will be described from the perspective of a physical broadcast channel information transmission apparatus, which may be specifically integrated in a terminal, which may include a mobile phone, a tablet Computer, a notebook Computer, a Personal Computer (PC), and the like.
A method for transmitting physical broadcast channel information comprises the following steps: replacing at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel with at least one subcarrier of a reference signal for terminal measurement, wherein a terminal measurement synchronization signal block comprises the physical broadcast channel; and sending the effective information carried by the physical broadcast channel and the reference signal in time-frequency resources.
As shown in fig. 2, the specific flow of the physical broadcast channel information transmission method is as follows:
201. at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel is replaced by at least one subcarrier of a reference signal used for terminal measurement, and a terminal measurement synchronization signal block contains the physical broadcast channel.
For example, in the SSB measured by the terminal, the physical broadcast channel is divided into a first resource block group, a second resource block group, and a third resource block group, the resource block group of the physical broadcast channel carries 12-bit effective information, and is distributed in the three resource block groups, and most of the rest data is meaningless data. In order to improve a physical broadcast channel, a terminal stores 12-bit effective information carried by the physical broadcast channel in a second resource block group in a centralized manner, meaningless data are stored in subcarriers of a first resource block group and a third resource block group, initial values of reference signals are generated according to indexes of SSBs (system state information) measured by the terminal, cell identity information and symbol codes of time-frequency resources and a sequence initialization formula, subcarriers of the reference signals are generated by using a reference signal sequence definition formula, and subcarriers of the meaningless data of corresponding quantities stored in the first resource block group and the third resource block group are replaced by subcarriers of all or part of the generated reference signals. As shown in fig. 3, a physical broadcast channel in the measurement SSB of the terminal before improvement includes 48 resource blocks, each resource block has 12 subcarriers, each of the 12 subcarriers is composed of PBCH data and DMRS demodulation reference signals, 3 PBCH data are spaced between each DMRS demodulation reference signal, and effective information of 12 bits is distributed in the PBCH data. As shown in fig. 4, after improvement, a physical broadcast channel in a terminal measurement SSB is divided into three resource block groups, 12 bits of effective information are centrally distributed in a second resource block group, information carried by a first resource block group and a third resource block group includes reference signals and meaningless data, the second resource block group includes 8 resource blocks, each resource block has 12 subcarriers, each resource block is composed of PBCH data and DMRS demodulation reference signals, the first resource block group and the third resource block group include 40 resource blocks, each resource block has 12 subcarriers, and each resource block is composed of reference signals used for terminal measurement.
The SSB is a synchronization signal block set by the NR system, and is composed of a PSS, an SSS, and a physical broadcast channel. There are multiple SSBs in a carrier, only one is used for cell search, the rest are all used for terminal measurement, occupy 4 consecutive OFDM symbols, and are distributed in 240 consecutive subcarriers in the frequency domain, the 240 subcarriers occupy 20 resource blocks, each resource block has 12 subcarriers, the subcarrier spacing of the SSBs supports 15/30kHz (below 6 Ghz), 120/240kHz (above 6 Ghz).
The physical broadcast channel is divided into 48 resource blocks, 20 resource blocks close to the PSS are used as a first resource block group, 8 resource blocks above and below the SSS are used as a second resource block group, the remaining 20 resource blocks are used as a third resource block group, and information carried by the physical broadcast channel is sent in time-frequency resources.
The time frequency resource comprises a first symbol, a second symbol and a third symbol corresponding to a physical broadcast channel. Information contained in a first resource block group of a physical broadcast channel is transmitted on a first symbol of a time frequency resource, information contained in a second resource block group of the physical broadcast channel is transmitted on a second symbol of the time frequency resource, and information contained in a third resource block group of the physical broadcast channel is transmitted on a third symbol of the time frequency resource.
In the design of the NR system, the payload of the main system message carried by the physical broadcast channel in the SSB measured by the terminal is mostly meaningless and only has 12-bit valid information, including parameters SSB-subcarriersspacingmemon and pdcch-ConfigSIB1, which can help the terminal find the SSB for cell search.
Optionally, the index of the SSB and the cell identity information are obtained when the PSS/SSS synchronization is formed and the data carried on the physical broadcast channel in the second resource block group is demodulated, and the symbol code of the time-frequency resource, the SSB index, and the cell identity information are subjected to a mixed operation of addition, multiplication, division, and remainder according to a sequence initialization formula to generate the initialization value of the reference signal. The sequence initialization formula is specifically as follows:
wherein n issFor symbol coding of time-frequency resources, issbIs an index to the SSB and,
is cell identity information.
Optionally, the number of resource blocks occupied by meaningless data is obtained, the number of resource blocks is multiplied by the number of subcarriers contained in one resource block, for example, the number of resource blocks is 20, the number of subcarriers included in one resource block is 12,12 × 20 is 240, the total number of atomic carriers occupied by meaningless data is 240, 0 to the total number of atomic carriers 240 are used as a parameter sequence for generating the subcarrier sequence, a random number sequence is generated by using a pseudo random number generation algorithm according to the initialization value, acquiring random numbers of double number positions of the reference parameter and random numbers of double number plus one position of the reference parameter in the random number sequence, generating at least one complex number as a sub-carrier to be replaced according to the random number at the position of the double number of the reference parameter and the random number at the position of the double number plus one of the reference parameter, and forming at most 240 sub-carriers. The reference signal sequence definition formula is specifically:
wherein m is a quoted parameter, and according to the value of m, a total number of 240 reference signals can be generated. From the result of the formula, it can be found that the value of the reference signal is complex and j is the imaginary unit.
Optionally, in the design of the NR system, there are multiple SSBs at different positions in a carrier, but not every SSB carries CORESET 0, if the SSB carries CORESET 0, it indicates that the SSB carries type0-PDCCH commonsearch space is common, then the SSB is used for cell search. If there is no band, it is used for terminal measurement. Before replacing meaningless data carried by the physical broadcast channel with a reference signal for terminal measurement, an SSB for terminal measurement needs to be found. After encountering an SSB, the terminal decodes MIB system information carried by a physical broadcast channel of the SSB to obtain KssbIf K isssbA value of greater than 23FR1, or KssbIf the value of (2) is greater than 11FR2, it indicates that the type0-PDCCH common search space corresponding to the currently found SSB does not exist, and the result indicates that the SSB is used for terminal measurement and not used for cell search.
Where FR1 corresponds to a frequency range 410MHZ to 7125MHZ in 5G, with values ranging from 0 to 23, indicated by 15kHZ, and FR2 corresponds to a frequency range 24250MHZ to 52600MHZ in 5G, with values ranging from 0 to 11, indicated by 60 kHZ.
Optionally, if the currently found SSB is not used for terminal measurement, it is necessary to continue to find the next SSB, which may be KssbThe system message search space for SIB1 on the next SSB is found on the frequency bin of the most recent SSB block. The specific method is that if K is more than or equal to 24ssb≤29FR1，12≤KssbLess than or equal to 13FR2, the frequency point corresponding to the next SSB
According to KssbCo-determined with pdcch-CongfigSIB1 in MIB when K isssb＝31FR1，Kssb15FR2, the SSB is located in a frequency range
The SSBs of (a) do not have CORESET 0, i.e., the SSBs in this range are all used for terminal measurement.
Wherein the content of the first and second substances,
is the frequency bin offset for the next SSB,
the upper 4 bits of pdcch-ConfigSIB1,
is the lower 4 bits of pdcch-ConfigSIB 1.
202. And sending the effective information carried by the physical broadcast channel and the reference signal in time-frequency resources.
For example, the valid information and the DMRS demodulation reference signal are stored in a second resource block group of the physical broadcast channel, the reference signal or meaningless data is stored in a first resource block group and a third resource block group of the physical broadcast channel, information included in the second resource block group is transmitted on a second symbol of the time-frequency resource corresponding to the physical broadcast channel, information included in the first resource block group is transmitted on a first symbol of the time-frequency resource corresponding to the physical broadcast channel, and information included in the third resource block group is transmitted on a third symbol of the time-frequency resource corresponding to the physical broadcast channel.
The time frequency resource comprises a first symbol, a second symbol and a third symbol corresponding to a physical broadcast channel.
In order to better implement the above method, an embodiment of the present invention may further provide a physical broadcast channel information transmission apparatus, where the physical broadcast channel information transmission apparatus may be specifically integrated in a network device, and the network device may be a terminal or the like.
For example, as shown in fig. 5, the physical broadcast channel information transmission apparatus may include a replacement unit 501 and a transmission unit 502, as follows:
(1) replacement unit 501
A replacing unit 501, configured to replace at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel with at least one subcarrier of a reference signal used for terminal measurement.
For example, after generating a reference signal sequence value for terminal measurement by a formula, the replacing unit 501 replaces meaningless data carried in the original physical broadcast channel with the reference signal sequence value.
(2) Transmitting unit 502
A sending unit 502, configured to send the effective information and the reference signal carried by the physical broadcast channel in a time-frequency resource.
For example, the transmitting unit 502 transmits data carried on the physical broadcast channel on symbols of the time-frequency resource after meaningless data of the physical broadcast channel is replaced by the generated reference signal sequence values.
Accordingly, an embodiment of the present invention further provides a terminal, as shown in fig. 6, the terminal may include Radio Frequency (RF) circuit 601, a memory 602 including one or more computer-readable storage media, an input unit 603, a display unit 604, a sensor 605, an audio circuit 606, a Wireless Fidelity (WiFi) module 607, a processor 608 including one or more processing cores, and a power supply 609. Those skilled in the art will appreciate that the terminal structure shown in fig. 6 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. Wherein:
the RF circuit 601 may be used for receiving and transmitting signals during a message transmission or communication process, and in particular, for receiving downlink messages from a base station and then processing the received downlink messages by one or more processors 608; in addition, data relating to uplink is transmitted to the base station. In general, the RF circuit 601 includes, but is not limited to, an antenna, at least one Amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuit 601 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), and the like.
The memory 602 may be used to store software programs and modules, and the processor 608 executes various functional applications and data processing by operating the software programs and modules stored in the memory 602. The memory 602 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal, etc. Further, the memory 602 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 602 may also include a memory controller to provide the processor 608 and the input unit 603 access to the memory 602.
The input unit 603 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, in one particular embodiment, input unit 603 may include a touch-sensitive surface as well as other input devices. The touch-sensitive surface, also referred to as a touch display screen or a touch pad, may collect touch operations by a user (e.g., operations by a user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment) thereon or nearby, and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 608, and can receive and execute commands sent by the processor 608. In addition, touch sensitive surfaces may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. The input unit 603 may include other input devices in addition to the touch-sensitive surface. In particular, other input devices may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 604 may be used to display information input by or provided to the user and various graphical user interfaces of the terminal, which may be made up of graphics, text, icons, video, and any combination thereof. The Display unit 604 may include a Display panel, and optionally, the Display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor 608 to determine the type of touch event, and the processor 608 then provides a corresponding visual output on the display panel according to the type of touch event. Although in FIG. 6 the touch-sensitive surface and the display panel are two separate components to implement input and output functions, in some embodiments the touch-sensitive surface may be integrated with the display panel to implement input and output functions.
The terminal may also include at least one sensor 605, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that may turn off the display panel and/or the backlight when the terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor and the like which can be configured at the terminal are not described in detail herein.
WiFi belongs to short-distance wireless transmission technology, and the terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 607, and provides wireless broadband internet access for the user. Although fig. 6 shows the WiFi module 607, it is understood that it does not belong to the essential constitution of the terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The processor 608 is a control center of the terminal, connects various parts of the entire handset using various interfaces and lines, and performs various functions of the terminal and processes data by operating or executing software programs and/or modules stored in the memory 602 and calling data stored in the memory 602, thereby performing overall monitoring of the handset. Optionally, processor 608 may include one or more processing cores; preferably, the processor 608 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 608.
The terminal also includes a power supply 609 (e.g., a battery) for powering the various components, which may preferably be logically coupled to the processor 608 via a power management system, such that functions such as managing charging, discharging, and power consumption are performed via the power management system. The power supply 609 may also include any component of one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.
Although not shown, the terminal may further include a camera, a bluetooth module, and the like, which will not be described herein. Specifically, in this embodiment, the processor 608 in the terminal loads the executable file corresponding to the process of one or more application programs into the memory 602 according to the following instructions, and the processor 608 runs the application programs stored in the memory 602, thereby implementing various functions: the effective information carried by the physical broadcast channel is stored in a second resource block group in a centralized manner, the meaningless data is stored in a first resource block group and a third resource block group, the symbol coding of the time-frequency resource, the index of the synchronous signal block and the cell number of the synchronous signal block are used for generating the initialization value of the reference signal, at least one subcarrier is generated by the initialization value, at least one atomic carrier is replaced by at least one subcarrier, and the improvement of the physical broadcast channel is completed.
The above detailed description is provided for a physical broadcast channel and information transmission method and apparatus provided by the embodiments of the present invention, and a specific example is applied in the present disclosure to explain the principle and the implementation of the present invention, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. A method for transmitting physical broadcast channel information, comprising:
replacing at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel with at least one subcarrier used for a terminal measurement reference signal, wherein a terminal measurement synchronization signal block comprises the physical broadcast channel;
sending the effective information carried by the physical broadcast channel and the reference signal in time-frequency resources;
the replacing at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel with at least one subcarrier used for a terminal to measure a reference signal includes:
storing effective information carried by the physical broadcast channel in a second resource block group in a centralized manner, wherein the information contained in the second resource block group is transmitted on a second symbol of the time-frequency resource corresponding to the physical broadcast channel;
storing the meaningless data in a first resource block group and a third resource block group, wherein the information contained in the first resource block group is transmitted on a first symbol of the time-frequency resource corresponding to the physical broadcast channel, and the information contained in the third resource block group is transmitted on a third symbol of the time-frequency resource corresponding to the physical broadcast channel;
and generating at least one subcarrier of the reference signal and replacing at least one atomic carrier.
2. The method of claim 1, wherein the generating the at least one subcarrier of the reference signal and replacing the at least one atomic carrier comprises:
generating an initialization value of the reference signal by using symbol encoding of the time-frequency resource, an index of the synchronization signal block and cell identity information of the synchronization signal block;
generating at least one subcarrier by using the initialization value;
replacing at least one of the atomic carriers with at least one of the sub-carriers.
3. The method of claim 2, wherein the generating the initialization value of the reference signal by using the symbol coding of the time-frequency resource, the index of the synchronization signal block and the cell identity information of the synchronization signal block comprises:
demodulating effective information carried by the physical broadcast channel;
acquiring an index of the synchronization signal block and cell identity information of the synchronization signal block, wherein the index and the cell number are obtained in the process of forming the synchronization signal block and demodulating;
and performing mixed operation of addition, multiplication, division and complementation on the symbol codes, the indexes and the cell identity information to generate an initialization value of the reference signal.
4. The method of claim 2, wherein the generating at least one of the subcarriers using the initialization value comprises:
acquiring the number of resource blocks occupied by the meaningless data;
multiplying the number of the resource blocks by the number of subcarriers contained in one resource block to obtain the total number of atomic carriers occupied by the meaningless data;
taking the total number of 0 to the atomic carriers as a parameter sequence for generating the sub-carrier sequence reference;
generating a random number sequence by utilizing a pseudo random number generation algorithm according to the initialization value;
acquiring random numbers at the position of two times of the reference parameter and random numbers at the position of two times plus one of the reference parameter in the random number sequence;
and generating at least one complex number as the subcarrier according to the random number at the position of the double number of the reference parameter and the random number at the position of the double number plus one of the reference parameter.
5. The method of claim 1, wherein the transmitting the valid information carried by the physical broadcast channel and the reference signal in the time-frequency resource comprises:
defining a time frequency resource comprising a first symbol, a second symbol and a third symbol corresponding to the physical broadcast channel;
transmitting the effective information on a second symbol of the time frequency resource corresponding to the physical broadcast channel;
and transmitting the reference signal on a first symbol of the time frequency resource and a third symbol of the time frequency resource corresponding to the physical broadcast channel.
6. A physical broadcast channel, comprising:
a second resource block group, where the second resource block group includes effective information for searching for a cell search SSB and a DMRS demodulation reference signal, and information included in the second resource block group is transmitted on a second symbol of the time-frequency resource corresponding to the physical broadcast channel;
the first resource block group and the third resource block group comprise reference signals and meaningless data, information contained in the first resource block group is transmitted on a first symbol of a time-frequency resource corresponding to the physical broadcast channel, information contained in the third resource block group is transmitted on a third symbol of the time-frequency resource corresponding to the physical broadcast channel, indexes of SSBs, cell identity information and symbol codes of the time-frequency resource measured by a terminal generate initial values of the reference signals according to a sequence initialization formula, and then subcarriers of the reference signals are generated by using a reference signal sequence definition formula, wherein the subcarriers of the reference signals are used for replacing at least one atomic carrier occupied by the meaningless data contained in the first resource block group and the third resource block group.
7. A physical broadcast channel information transmission apparatus, comprising:
a replacing unit, configured to replace at least one atomic carrier occupied by meaningless data carried by a physical broadcast channel with at least one subcarrier of a reference signal used for terminal measurement;
a sending unit, configured to send, in a time-frequency resource, the effective information and the reference signal carried by the physical broadcast channel;
the replacement unit is further configured to:
storing effective information carried by the physical broadcast channel in a second resource block group in a centralized manner, wherein the information contained in the second resource block group is transmitted on a second symbol of the time-frequency resource corresponding to the physical broadcast channel;
storing the meaningless data in a first resource block group and a third resource block group, wherein the information contained in the first resource block group is transmitted on a first symbol of the time-frequency resource corresponding to the physical broadcast channel, and the information contained in the third resource block group is transmitted on a third symbol of the time-frequency resource corresponding to the physical broadcast channel;
and generating at least one subcarrier of the reference signal and replacing at least one atomic carrier.
8. A terminal device comprising a memory and a processor; the memory stores an application program, and the processor is configured to execute the application program in the memory to perform the operations of the physical broadcast channel information transmission method according to any one of claims 1 to 5.
9. A storage medium storing a plurality of instructions, the instructions being adapted to be loaded by a processor to perform the steps of the physical broadcast channel information transmission method according to any one of claims 1 to 5.
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