CN114244483B - Synchronous signal block transmission method, system, communication device and storage medium - Google Patents

Synchronous signal block transmission method, system, communication device and storage medium Download PDF

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Publication number
CN114244483B
CN114244483B CN202010938396.XA CN202010938396A CN114244483B CN 114244483 B CN114244483 B CN 114244483B CN 202010938396 A CN202010938396 A CN 202010938396A CN 114244483 B CN114244483 B CN 114244483B
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frequency point
signal block
frequency
terminal
synchronous signal
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CN114244483A (en
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周雄
彭岳峰
张全君
徐玲玲
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Guangzhou Haige Communication Group Inc Co
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Guangzhou Haige Communication Group Inc Co
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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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/715—Interference-related aspects
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/715—Interference-related aspects
    • H04B2001/7154—Interference-related aspects with means for preventing interference
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application relates to a synchronous signal block transmission method, a synchronous signal block transmission system, communication equipment and a storage medium. The method comprises the following steps: determining a transmitting frequency point of the synchronous signal block according to a preset dense synchronous grid; acquiring a frequency point identifier of the transmitting frequency point; and transmitting the synchronous signal block to a terminal through the transmitting frequency point, transmitting the frequency point identification to the terminal through a preset downlink narrowband link, so that the terminal can determine a receiving frequency point according to the frequency point identification, and receiving the synchronous signal block through the receiving frequency point. By adopting the method, the searching time delay of the synchronous signal block can be reduced, the network access time is reduced, the communication link between the sending frequency point and the receiving frequency point is less interfered, and the anti-interference capability of the synchronous signal block transmission can be improved.

Description

Synchronous signal block transmission method, system, communication device and storage medium
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method, a system, a communication device, and a storage medium for transmitting a synchronization signal block.
Background
With the development of mobile communication technology, NR (New Radio) technology appears, where NR can support service scenarios such as embbe (Enhanced Mobile Broadband ), URLLC (Ultra-Relaible and Low Latency Communication, high reliability and low latency communication), mctc (massive Machine Type of Communication, mass machine type communication), and so on, and can meet various service requirements of various industries. NR is generally deployed in an authorized frequency band, has strong supervision, does not have different system interference and malicious interference, and when the NR is applied to the fields of military communication, emergency communication and the like, the NR system is required to have stronger anti-interference capability due to weaker supervision, more orientation, tracking and deception interference due to the fact that a private network communication frequency band is used. Since NR realizes the establishment of a terminal access network and a communication connection by transmitting a synchronization signal block (Synchronization Signal Block, SSB), when the transmission of the synchronization signal block is interfered, the terminal is likely to fail to reliably establish the access network and the communication connection, and thus the anti-interference capability of the transmission of the synchronization signal block needs to be improved.
The current NR system can avoid subcarriers with poor channel conditions through flexible frequency selective scheduling, but the frequency selective scheduling can only be used for interference avoidance of a shared channel; carrier aggregation may also be used for interference avoidance by activating/deactivating different carriers, but needs to be implemented after the communication connection is established; the BWP (Bandwidth Part) may be introduced to flexibly allocate the time-frequency resource, but the implementation is also required after the communication connection is established, so that the anti-interference technology currently applied to NR cannot ensure the anti-interference capability of the synchronization signal block transmission, and the NR system needs to search the whole synchronization signal grid (Global Synchronization Channel Number, GSCN), which is easy to cause a larger search delay of the synchronization signal block and a longer network access time.
Therefore, the synchronous signal block transmission in the current NR technology has the problems of poor anti-interference capability, large search time delay and long network access time.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a synchronization signal block transmission method, system, communication device, and storage medium capable of improving the anti-interference capability of a synchronization signal block and reducing the delay.
A method of synchronizing signal block transmission, the method comprising:
determining a transmitting frequency point of the synchronous signal block according to a preset dense synchronous grid;
acquiring a frequency point identifier of the transmitting frequency point;
and transmitting the synchronous signal block to a terminal through the transmitting frequency point, transmitting the frequency point identification to the terminal through a preset downlink narrowband link, so that the terminal can determine a receiving frequency point according to the frequency point identification, and receiving the synchronous signal block through the receiving frequency point.
In one embodiment, the determining, according to a preset dense synchronization grid, a transmission frequency point of the synchronization signal block includes:
obtaining candidate frequency points of the synchronous signal blocks according to the dense synchronous grids;
determining the candidate frequency point interference intensity of the candidate frequency point;
comparing the candidate frequency point interference intensity with a preset interference intensity threshold value;
and if the interference intensity of the candidate frequency points is below the interference intensity threshold, determining the candidate frequency points as the sending frequency points.
In one embodiment, the method further comprises:
acquiring the interference intensity of the transmission frequency point;
comparing the interference intensity of the sending frequency point with the interference intensity threshold value;
And if the interference intensity of the sending frequency point exceeds the interference intensity threshold, re-determining the sending frequency point of the synchronous signal block to obtain an updated sending frequency point, and sending the synchronous signal block through the updated sending frequency point.
In one embodiment, the downlink narrowband link includes at least one of a downlink narrowband hopping link, a downlink narrowband spreading link, and a downlink narrowband low code rate link.
A method of synchronizing signal block transmission, the method comprising:
receiving a frequency point identifier sent by a base station through a preset downlink narrowband link;
determining a receiving frequency point of the synchronous signal block according to the frequency point identification;
and receiving the synchronous signal block sent by the base station through the receiving frequency point.
In one embodiment, the method further comprises:
receiving the updated frequency point identification sent by the base station through the downlink narrowband link; the updated frequency point identifier is a frequency point identifier of the updated transmitting frequency point; when the interference intensity of the sending frequency point exceeds a preset interference intensity threshold value, the base station redetermines the sending frequency point of the synchronous signal block to obtain the updated sending frequency point;
And determining the receiving frequency point of the synchronous signal block according to the updated frequency point identification.
In one embodiment, the downlink narrowband link includes at least one of a downlink narrowband hopping link, a downlink narrowband spreading link, and a downlink narrowband low code rate link.
A synchronous signal block transmission system comprises a base station and a terminal;
the base station is used for determining the sending frequency point of the synchronous signal block according to a preset dense synchronous grid and obtaining the frequency point identification of the sending frequency point;
the base station is further configured to send the synchronization signal block to a terminal through the sending frequency point, and send the frequency point identifier to the terminal through a preset downlink narrowband link;
the terminal is configured to receive, through the downlink narrowband link, the frequency point identifier sent by the base station, and determine, according to the frequency point identifier, a reception frequency point of the synchronization signal block;
the terminal is further configured to receive, through the receiving frequency point, the synchronization signal block sent by the base station.
A synchronization signal block transmission apparatus, the apparatus comprising:
the transmitting frequency point determining module is used for determining transmitting frequency points of the synchronous signal blocks according to a preset dense synchronous grid;
The frequency point identification acquisition module is used for acquiring the frequency point identification of the transmitting frequency point;
and the sending module is used for sending the synchronous signal block to a terminal through the sending frequency point, sending the frequency point identification to the terminal through a preset downlink narrowband link, so that the terminal can determine a receiving frequency point according to the frequency point identification, and receiving the synchronous signal block through the receiving frequency point.
A synchronization signal block transmission apparatus, the apparatus comprising:
the frequency point identification receiving module is used for receiving the frequency point identification sent by the base station through a preset downlink narrowband link;
the receiving frequency point determining module is used for determining the receiving frequency point of the synchronous signal block according to the frequency point identification;
and the synchronous signal block receiving module is used for receiving the synchronous signal block sent by the base station through the receiving frequency point.
A communication device comprising a memory storing a computer program and a processor which when executing the computer program performs the steps of:
determining a transmitting frequency point of the synchronous signal block according to a preset dense synchronous grid;
acquiring a frequency point identifier of the transmitting frequency point;
And transmitting the synchronous signal block to a terminal through the transmitting frequency point, transmitting the frequency point identification to the terminal through a preset downlink narrowband link, so that the terminal can determine a receiving frequency point according to the frequency point identification, and receiving the synchronous signal block through the receiving frequency point.
A communication device comprising a memory storing a computer program and a processor which when executing the computer program performs the steps of:
receiving a frequency point identifier sent by a base station through a preset downlink narrowband link;
determining a receiving frequency point of the synchronous signal block according to the frequency point identification;
and receiving the synchronous signal block sent by the base station through the receiving frequency point.
A readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
determining a transmitting frequency point of the synchronous signal block according to a preset dense synchronous grid;
acquiring a frequency point identifier of the transmitting frequency point;
and transmitting the synchronous signal block to a terminal through the transmitting frequency point, transmitting the frequency point identification to the terminal through a preset downlink narrowband link, so that the terminal can determine a receiving frequency point according to the frequency point identification, and receiving the synchronous signal block through the receiving frequency point.
A readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
receiving a frequency point identifier sent by a base station through a preset downlink narrowband link;
determining a receiving frequency point of the synchronous signal block according to the frequency point identification;
and receiving the synchronous signal block sent by the base station through the receiving frequency point.
According to the synchronous signal block transmission method, the synchronous signal block transmission system, the communication equipment and the storage medium, the transmission frequency points of the synchronous signal blocks are determined according to the preset dense synchronous grids, more candidate frequency points can be provided for transmission of the synchronous signal blocks, so that the synchronous signal blocks can flexibly avoid the interfered frequency bands, and the frequency points with smaller interference are selected as the transmission frequency points; the method comprises the steps of obtaining a frequency point identifier of a sending frequency point, sending a synchronous signal block to a terminal through the sending frequency point, sending the frequency point identifier to the terminal through a downlink narrow-band link, enabling the terminal to reliably receive the frequency point identifier, quickly determining a receiving frequency point through the frequency point identifier, reducing search delay of the synchronous signal block, reducing network access time, enabling a communication link between the sending frequency point and the receiving frequency point to be less interfered, and improving anti-interference capability of synchronous signal block transmission.
Drawings
FIG. 1 is a flow chart of a method for transmitting a synchronization signal block according to an embodiment;
FIG. 2 is a schematic diagram of a dense synchronization grid in one embodiment;
FIG. 3 is a schematic diagram of a downlink narrowband supplemental link in one embodiment;
FIG. 4 is a flowchart of a method for transmitting a synchronization signal block according to another embodiment;
FIG. 5 is a flowchart of a method for transmitting a synchronization signal block according to another embodiment;
fig. 6 is a flow chart of a method for transmitting a synchronization signal block for a base station according to an embodiment;
FIG. 7 is a block diagram of a synchronous signal block transmission system in one embodiment;
fig. 8 is an internal structural diagram of a communication device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The synchronous signal block transmission method provided by the application can be applied to cell searching and synchronizing processes of various communication devices. Specifically, the method can be applied to the cell search and synchronization process of the terminal accessing the base station, and can also be applied to the cell search and synchronization process of another base station connected with the base station. Further, it can be widely applied to NR communication systems. The transmission of the synchronization signal block provided in the present application may be embodied from a signal processing flow in the above application scenario.
The terminal can be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers and portable wearable devices; the base station may be, but not limited to, various macro, micro, pico, and distributed base stations, further, the terminal may be an NR terminal, and the base station may be an NR base station.
In one embodiment, as shown in fig. 1, there is provided a synchronization signal block transmission method, which is illustrated by way of example as being applied to a base station of an NR communication system, including the steps of:
step S110, determining the sending frequency point of the synchronous signal block according to a preset dense synchronous grid.
The dense synchronization grid may be a plurality of frequency domain positions distributed more densely than the conventional synchronization signal grid, and further, the dense synchronization grid may be a plurality of frequency domain positions of the NR frequency band.
In a specific implementation, a preset dense synchronization grid can be stored in a base station, after the base station is started, all frequency domain positions in the dense synchronization grid can be used as candidate frequency points of a synchronization signal block, the interference intensity of each candidate frequency point is collected through scanning a current wireless environment, wherein the interference intensity can be interference signal energy obtained through frequency sweeping, if a plurality of interference intensities exceed an interference intensity threshold value preset in the base station, the candidate frequency point is judged to have interference, the candidate frequency point cannot be used as a transmission frequency point of the synchronization signal block, otherwise, if the plurality of interference intensities are within the interference intensity threshold value, the candidate frequency point is judged to have no interference, and the candidate frequency point can be used as a transmission frequency point of the synchronization signal block. The base station can use all the frequency points with the interference intensity within the threshold value as the transmitting frequency points, and can select part of the frequency points with the interference intensity within the threshold value as the transmitting frequency points.
In practical application, a base station and a terminal in an NR communication system may pre-agree on a plurality of frequency domain positions as a dense synchronization grid, and number each frequency domain position in the dense synchronization grid to obtain a frequency point identifier. For example, a plurality of frequency domain positions may be preset in the base station and the terminal, and after the number N and the starting position of the dense synchronization grids are obtained, the starting positions in the plurality of frequency domain positions may be used as starting points, and the N frequency domain positions may be sequentially selected as the dense synchronization grids; or a reference plus offset mode can be adopted, when the reference frequency f is obtained 0 And a frequency offset Δf, according to f=f 0 +n×Δf results in a dense synchronization grid, where N (n=0, 1,2, … …, N-1) is the offset distance. After the dense synchronization grids are obtained, the base station and the terminal can number the obtained dense synchronization grids in sequence to obtain the frequency point identification. After obtaining the frequency domain position and the frequency point identifier of the dense synchronization grid, the base station and the terminal can correspondingly store the frequency domain position and the frequency point identifier in respective data tables. The base station can sweep frequency in the working frequency band corresponding to the dense synchronization grid to obtain the interference signal energy of each frequency domain position in the dense synchronization grid, for example, the interference signal energy can be communicated And measuring the energy of the interference signals on the dense synchronous grid by the interference measurement reference signals, and determining the current frequency domain position as a transmitting frequency point of the synchronous signal block when the energy of the interference signals is within a preset energy threshold.
The transmission frequency point may be a specific frequency value or a frequency interval.
Fig. 2 is a schematic diagram of a dense synchronization grid, where the carrier grid may be a carrier position in an NR system, and the sparse synchronization grid may be a synchronization signal grid GSCN used in the current NR system. The civil communication can use a sparse synchronization grid to transmit the synchronization signal blocks, the private network communication can use a synchronization grid which is denser than the civil communication, the specific frequency domain interval can be determined according to the anti-interference requirement, and the denser the synchronization grid is, the stronger the anti-interference performance is. As shown in fig. 2, if the frequency interval between carrier grids is set to d, the frequency interval between sparse synchronization grids is set to 9d, and the frequency interval between dense synchronization grids is set to 0.5d.
Step S120, obtaining the frequency point identification of the sending frequency point.
The frequency point identifier may be a frequency domain position number of the transmitting frequency point.
In a specific implementation, although the dense synchronization grids can provide more candidate frequency points for transmission of the synchronization signal blocks, so that the synchronization signal blocks can flexibly avoid the interfered frequency bands, the increase of the density of the synchronization grids easily causes the increase of the search times and the increase of the search time, thereby increasing the time delay of search and synchronization. In order to solve the problem, after determining the transmission frequency point of the synchronization signal block, the base station may find the frequency point identifier corresponding to the transmission frequency point according to the correspondence between the frequency domain position and the frequency point identifier stored in the base station data table in advance.
For example, the base station obtains the frequency domain position f in the dense synchronization grid 0 ，f 1 ，f 2 The interference intensity is small, and after the interference intensity is used as a transmitting frequency point, the frequency domain position f can be found according to the corresponding relation between the frequency domain position and the frequency point mark recorded in the base station data table 0 ，f 1 ，f 2 Corresponding toThe frequency bin identifications are 1500, 1505, 1510 in order.
Step S130, the synchronous signal block is sent to the terminal through the sending frequency point, and the frequency point identification is sent to the terminal through the preset downlink narrow-band link, so that the terminal can determine the receiving frequency point according to the frequency point identification, and the synchronous signal block is received through the receiving frequency point.
The downlink narrowband link may be a downlink narrowband supplemental link with an anti-interference function, including but not limited to various downlink narrowband links using frequency hopping, spread spectrum, and low code rate transmission technologies.
In a specific implementation, the base station can simultaneously send the synchronization signal block and the frequency point identifier of the synchronization signal block to the terminal, the terminal can firstly receive the frequency point identifier, and directly determine a receiving frequency point according to the frequency point identifier, wherein the receiving frequency point can be the same as the frequency domain of the sending frequency point. The synchronous signal block is received by the receiving frequency point, so that the process of searching the synchronous signal block can be omitted, and the searching time delay and the synchronous time delay are reduced. The frequency point identifier can be transmitted through a downlink narrowband supplemental link in order to ensure reliable transmission of the frequency point identifier.
For example, the base station acquires the transmission frequency point f 0 ，f 1 ，f 2 After the corresponding frequency point identifiers are 1500, 1505 and 1510, the synchronous signal block can be sent by sending the frequency point, meanwhile, the frequency point identifiers are sent by a downlink narrowband supplemental link, and after the terminal receives the frequency point identifiers, the terminal can find the frequency domain position f corresponding to the frequency point identifiers 1500, 1505 and 1510 according to the corresponding relation between the frequency domain position and the frequency point identifiers which are pre-stored in the terminal data table 0 ，f 1 ，f 2 And f is taken 0 ，f 1 ，f 2 As a receiving frequency point of the synchronous signal block, a receiving frequency point f is used 0 ，f 1 ，f 2 A synchronization signal block is received.
Fig. 3 provides a schematic diagram of a downlink narrowband supplemental link, where the downlink narrowband supplemental link may be a downlink narrowband link with a lower frequency, and is used for reliably transmitting a frequency point identifier, an NR signal may be transmitted through an NR downlink with a higher frequency, and a base station may send the frequency point identifier and the NR signal through the downlink narrowband supplemental link and the NR downlink simultaneously, where the NR signal may include a synchronization signal block.
According to the synchronous signal block transmission method, the transmission frequency points of the synchronous signal blocks are determined according to the preset dense synchronous grids, more candidate frequency points can be provided for transmission of the synchronous signal blocks, so that the synchronous signal blocks can flexibly avoid the interfered frequency bands, and the frequency points with smaller interference are selected as the transmission frequency points; the method comprises the steps of obtaining a frequency point identifier of a sending frequency point, sending a synchronous signal block to a terminal through the sending frequency point, sending the frequency point identifier to the terminal through a downlink narrow-band link, enabling the terminal to reliably receive the frequency point identifier, quickly determining a receiving frequency point through the frequency point identifier, reducing search delay of the synchronous signal block, reducing network access time, enabling a communication link between the sending frequency point and the receiving frequency point to be less interfered, and improving anti-interference capability of synchronous signal block transmission.
In one embodiment, the step S110 may specifically include: according to the dense synchronization grid, obtaining candidate frequency points of the synchronization signal block; determining the interference intensity of candidate frequency points of the candidate frequency points; comparing the candidate frequency point interference intensity with a preset interference intensity threshold value; and if the interference intensity of the candidate frequency point is below the interference intensity threshold value, determining the candidate frequency point as a transmitting frequency point.
The candidate frequency points may be all frequency domain positions included in the dense synchronization grid.
The candidate frequency point interference strength may be an interference signal energy measured on the candidate frequency point.
In a specific implementation, a base station may store a preset dense synchronization grid, after the base station is started, all frequency domain positions in the dense synchronization grid may be used as candidate frequency points of a synchronization signal block, by scanning a current wireless environment, interference intensity (for example, energy value of an interference signal) at each candidate frequency point is measured to obtain candidate frequency point interference intensity I, and by comparing the candidate frequency point interference intensity I with a preset interference intensity threshold I th In comparison, if the interference intensity of the candidate frequency point exceeds the interference intensity threshold (I > I) th ) Then judgeThe candidate frequency point has interference and can not be used as the sending frequency point of the synchronous signal block, otherwise, if the interference intensity of the candidate frequency point is within the interference intensity threshold value (I is less than or equal to I th ) And judging that the candidate frequency point has no interference and can be used as a transmitting frequency point of the synchronous signal block. The base station can make all interference intensities within a threshold value (I.ltoreq.I th ) The frequency point of (2) is used as a transmitting frequency point, and the interference intensity is within a threshold value (I is less than or equal to I) th ) Selecting part of frequency division points as transmitting frequency points.
Note that, the candidate frequency point may be a specific frequency value or a frequency interval.
In this embodiment, by obtaining candidate frequency points of the synchronization signal block according to the dense synchronization grid, all frequency points that can be used to transmit the synchronization signal block can be obtained; determining the interference intensity of candidate frequency points of the candidate frequency points, and selecting the frequency points for transmitting the synchronous signal blocks from the candidate frequency points according to the interference intensity; and comparing the interference intensity of the candidate frequency points with a preset interference intensity threshold, if the interference intensity of the candidate frequency points is lower than the interference intensity threshold, determining the candidate frequency points as transmitting frequency points, and selecting the frequency points with smaller interference intensity as transmitting frequency points, so that the interfered frequency band is flexibly avoided, and the anti-interference capability of the synchronous signal block transmission is improved.
In an embodiment, the method for transmitting a synchronization signal block may specifically further include: acquiring the interference intensity of a transmission frequency point of the transmission frequency point; comparing the interference intensity of the sending frequency point with an interference intensity threshold value; if the interference intensity of the sending frequency point exceeds the interference intensity threshold, the sending frequency point of the synchronous signal block is re-determined, the updated sending frequency point is obtained, and the synchronous signal block is sent through the updated sending frequency point.
The interference strength of the transmitting frequency point may be the energy of the interference signal measured on the transmitting frequency point.
The updated transmission frequency point may be a transmission frequency point that is reselected by the base station when the transmission frequency point is interfered.
In a specific implementation, after the base station sends the synchronization signal block to the terminal, a communication connection can be established between the base station and the terminal, and the terminalThe terminal is in a network connection state, and in the subsequent communication process, the base station can sense the interference intensity of the transmitting frequency point in real time to obtain the interference intensity I of the transmitting frequency point tx By transmitting the interference intensity I of the frequency point tx With interference intensity threshold I th In contrast, if the interference strength of the transmitting frequency point is within the interference strength threshold (I tx ≤I th ) If the interference intensity of the transmitting frequency point exceeds the interference intensity threshold (I > I) th ) And judging that the current transmission frequency point is interfered, and the transmission frequency point needs to be replaced, the base station can scan the candidate frequency points again, measure the interference intensity of each candidate frequency point, select a new transmission frequency point according to the interference intensity, and transmit the synchronous signal block to the terminal in the network connection state through the new transmission frequency point.
In this embodiment, by acquiring the interference intensity of the transmission frequency point, and comparing the interference intensity of the transmission frequency point with the interference intensity threshold, the situation that the transmission frequency point is interfered when the terminal is in the network connection state can be monitored in real time; if the interference intensity of the sending frequency point exceeds the interference intensity threshold value, the sending frequency point of the synchronous signal block is determined again, the updated sending frequency point is obtained, and the synchronous signal block is sent through the updated sending frequency point, so that the sending frequency point can be replaced when the sending frequency point is interfered, the anti-interference capability of the synchronous signal block transmission in the synchronous process is improved, and the normal synchronization of the communication system is ensured.
In one embodiment, the downlink narrowband link may specifically include at least one of a downlink narrowband hopping link, a downlink narrowband spreading link, and a downlink narrowband low code rate link.
The downlink narrowband hopping link may be a downlink narrowband supplemental link that communicates using a frequency hopping technique.
The downlink narrowband spread-spectrum link may be a downlink narrowband supplemental link that communicates using spread-spectrum techniques.
Wherein, the downlink narrowband low code rate link may be a downlink narrowband supplemental link that uses a lower channel coding code rate to transmit the synchronization signal block.
In a specific implementation, in order to ensure reliable transmission of the frequency point identifier, the base station may not use an NR channel, but transmit the frequency point identifier through a downlink narrowband supplemental link with stronger transmission reliability, and may further introduce technologies such as frequency hopping, spread spectrum, low code rate transmission, etc. into the downlink narrowband supplemental link to further improve the reliability of the frequency point identifier transmission. Wherein the downlink narrowband supplemental link may be a downlink narrowband link used for supplemental communication.
In this embodiment, the downlink narrowband link includes at least one of a downlink narrowband frequency hopping link, a downlink narrowband spread spectrum link and a downlink narrowband low code rate link, so that reliable transmission of the frequency point identifier can be ensured, the terminal can quickly determine the receiving frequency point according to the reliably transmitted frequency point identifier, and search time delay and network access duration of the synchronization signal block are reduced.
In one embodiment, as shown in fig. 4, there is provided a synchronization signal block transmission method, which is exemplified by a terminal applied to an NR communication system, including the steps of:
step S410, receiving a frequency point identifier sent by a base station through a preset downlink narrowband link.
Step S420, according to the frequency point identification, the receiving frequency point of the synchronous signal block is determined.
Step S430, receiving the synchronous signal block sent by the base station through the receiving frequency point.
In a specific implementation, the terminal may receive the frequency point identifier sent by the base station through a downlink narrowband link, where the downlink narrowband link may be a downlink narrowband supplemental link, a data table for recording a correspondence between a frequency domain position and the frequency point identifier may be stored in the terminal in advance, and the terminal may search, according to the data table, the frequency domain position corresponding to the received frequency point identifier, as a receiving frequency point, and receive a synchronization signal block sent by the base station on the receiving frequency point.
For example, the terminal may search the frequency point identifier sent by the base station in the downlink narrowband supplemental link first, and after obtaining the frequency point identifiers 1500, 1505, 1510, the terminal may find the frequency point identifier according to the terminal data tableThe corresponding frequency domain position is f 0 ，f 1 ，f 2 The terminal may be at a frequency domain location f 0 ，f 1 ，f 2 Searching for a synchronization signal block transmitted by the base station.
According to the synchronous signal block transmission method, the frequency point identification sent by the base station is received through the preset downlink narrow-band link, the receiving frequency point of the synchronous signal block is determined according to the frequency point identification, the terminal can reliably receive the frequency point identification, the receiving frequency point is rapidly determined through the frequency point identification, the searching time delay of the synchronous signal block is reduced, and the network access time is shortened; the receiving frequency point receives the synchronous signal block sent by the base station, so that the communication link between the sending frequency point and the receiving frequency point is less interfered, and the anti-interference capability of the synchronous signal block transmission is improved.
In an embodiment, the method for transmitting a synchronization signal block may specifically further include: receiving the updated frequency point identification sent by the base station through a downlink narrowband link; the updated frequency point identifier is the frequency point identifier of the updated transmitting frequency point; when the interference intensity of the sending frequency point exceeds a preset interference intensity threshold, the base station redetermines the sending frequency point of the synchronous signal block to obtain an updated sending frequency point; and determining the receiving frequency point of the synchronous signal block according to the updated frequency point identification.
In a specific implementation, when the terminal is in a network connection state, if the interference intensity of the current transmission frequency point exceeds a preset interference intensity threshold, the base station can judge that the transmission frequency point is interfered, reselect the transmission frequency point to obtain an updated transmission frequency point, and can acquire a frequency point identifier of the updated transmission frequency point as an updated frequency point identifier, and then the base station can send a synchronous signal block to the terminal through the updated transmission frequency point and simultaneously send the updated frequency point identifier to the terminal through a downlink narrowband link. The terminal can receive the updated frequency point identifier through the downlink narrowband link, find the frequency domain position corresponding to the updated frequency point identifier according to the pre-stored data table, and serve as a receiving frequency point, and then the terminal can receive the synchronous signal block sent by the base station on the receiving frequency point.
It should be noted that, after updating the transmitting frequency point and the frequency point identifier, the base station may also transmit frequency point update information to the terminal, if the terminal receives the frequency point update information, the process of receiving the updated frequency point identifier transmitted by the base station through the downlink narrowband link and determining the receiving frequency point of the synchronization signal block according to the updated frequency point identifier may be executed, otherwise, if the terminal does not receive the frequency point update information, the terminal may continue to use the original receiving frequency point.
In this embodiment, the updated frequency point identifier sent by the base station is received through the downlink narrowband link, so that the updated frequency point identifier can be reliably received; and determining the receiving frequency point of the synchronous signal block according to the updated frequency point identification, so that the receiving frequency point can be rapidly determined, and the synchronous time delay for synchronizing according to the synchronous signal block is reduced.
In one embodiment, the downlink narrowband link may specifically include at least one of a downlink narrowband hopping link, a downlink narrowband spreading link, and a downlink narrowband low code rate link.
In the specific implementation, the terminal can receive the frequency point identification through a downlink narrowband supplemental link with stronger transmission reliability, and the downlink narrowband supplemental link can be introduced with frequency hopping, spread spectrum, low code rate transmission and other technologies, so that the reliability of the frequency point identification transmission is further improved.
The specific limitation on the downlink narrowband is already described in the foregoing embodiments, and will not be repeated here.
In this embodiment, the downlink narrowband link includes at least one of a downlink narrowband frequency hopping link, a downlink narrowband spread spectrum link and a downlink narrowband low code rate link, so that reliable transmission of the frequency point identifier can be ensured, the terminal can quickly determine the receiving frequency point according to the reliably transmitted frequency point identifier, and search time delay and network access duration of the synchronization signal block are reduced.
In one embodiment, as shown in fig. 5, there is provided a synchronization signal block transmission method, which is exemplified as a base station applied to an NR communication system, including the steps of:
step S501, obtaining candidate frequency points of a synchronous signal block according to the dense synchronous grids;
step S502, determining the interference intensity of candidate frequency points of the candidate frequency points;
step S503, comparing the candidate frequency point interference intensity with a preset interference intensity threshold;
step S504, if the interference intensity of the candidate frequency point is below the interference intensity threshold, determining the candidate frequency point as a transmitting frequency point;
step S505, obtaining a frequency point identifier of a transmitting frequency point;
step S506, the synchronous signal block is sent to the terminal through the sending frequency point, and the frequency point identification is sent to the terminal through the preset downlink narrow-band link, so that the terminal can determine the receiving frequency point according to the frequency point identification, and the synchronous signal block is received through the receiving frequency point.
Step S507, obtaining the interference intensity of the transmission frequency point;
step S508, comparing the interference intensity of the sending frequency point with an interference intensity threshold;
in step S509, if the transmission frequency point interference strength exceeds the interference strength threshold, the process returns to step S501.
In order to facilitate a thorough understanding of embodiments of the present application by those skilled in the art, a description will be given below with reference to the specific example in fig. 6.
Fig. 6 provides a method for transmitting a synchronization signal block for a base station, which may specifically include the following steps:
step S601, after the base station is started, scanning the current wireless environment, collecting interference information, and selecting a proper frequency point in a non-interference frequency band as a transmitting frequency point of a synchronous signal block;
step S602, transmitting NR signals at the transmitting frequency points, and continuously transmitting frequency point information of a synchronous signal block in the NR signals at a downlink narrowband supplemental link;
step S603, in the working process, performing real-time interference sensing, and collecting interference signals in the bandwidth of the NR signal;
step S604, judging whether the current sending frequency point is interfered, if not, returning to step S603, if so, proceeding to step S605, and preparing to switch a new frequency point;
step S605, a base station selects a non-interference frequency band as a new transmission frequency point of a synchronous signal block according to real-time interference scanning information;
Step S606, the new frequency point information is sent to the terminal in the network connection state, and the step S602 is returned.
When a terminal enters the network to search a cell, firstly, a signal of a downlink narrowband supplemental link can be searched, frequency point information of an NR signal is obtained, then a frequency point corresponding to the frequency point information is used as a receiving frequency point, and a synchronous signal block is searched at the receiving frequency point.
For the connected terminal, after receiving the new frequency point information sent by the base station, the new frequency point position can be determined according to the new frequency point information, and the original receiving frequency point is switched to the new frequency point position.
According to the synchronous signal block transmission method, the narrow-band downlink supplemental link is utilized to carry the SSB frequency domain position information, the auxiliary terminal performs downlink synchronization, the flexibility of SSB in resisting interference can be improved, and the SSB can be prevented from being oriented, tracked and deceptively interfered. The downlink narrowband supplementary link can also reduce the search time of the dense synchronous grid, shorten the search time delay of SSB in the network access process of the terminal, rapidly complete the network access process and shorten the synchronous time delay of the terminal in the network connection state.
It should be understood that, although the steps in the flowcharts of fig. 1, 4-6 are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps of FIGS. 1, 4-6 may include steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the steps or stages in other steps.
In one embodiment, as shown in fig. 7, a synchronization signal block transmission system is provided, the system comprising a base station 702 and a terminal 704;
the base station 702 is configured to determine a transmission frequency point of the synchronization signal block according to a preset dense synchronization grid, and obtain a frequency point identifier of the transmission frequency point; and is further configured to send a synchronization signal block to the terminal 704 through a transmission frequency band, and send a frequency point identifier to the terminal 704 through a preset downlink narrowband link;
the terminal 704 is configured to receive, through a downlink narrowband link, a frequency point identifier sent by the base station 702, and determine a receiving frequency point of the synchronization signal block according to the frequency point identifier; and is further configured to receive, through a receiving frequency point, a synchronization signal block sent by the base station 702.
In a specific implementation, a preset dense synchronization grid can be stored in a base station, after the base station is started, all frequency domain positions in the dense synchronization grid can be used as candidate frequency points of a synchronization signal block, the interference intensity of each candidate frequency point is collected by scanning a current wireless environment, if a plurality of interference intensities exceed an interference intensity threshold value by comparing the interference intensity with the interference intensity threshold value preset in the base station, the candidate frequency point is judged to have interference and can not be used as a transmission frequency point of the synchronization signal block, otherwise, if the plurality of interference intensities are within the interference intensity threshold value, the candidate frequency point is judged to have no interference and can be used as a transmission frequency point of the synchronization signal block, and the base station can select part of frequency points from all frequency points with the interference intensities within the threshold value as transmission frequency points. According to the corresponding relation between the frequency domain position and the frequency point identifier pre-stored in the base station data table, the base station can find the frequency point identifier corresponding to the transmitting frequency point, transmit the synchronous signal block through the transmitting frequency point, and transmit the frequency point identifier through the downlink narrowband link. The terminal can firstly receive the frequency point identification through the downlink narrow-band link, then find the frequency domain position corresponding to the frequency point identification as a receiving frequency point according to the corresponding relation between the frequency domain position and the frequency point identification pre-stored in the terminal data table, and receive the synchronous signal block sent by the base station through the receiving frequency point.
The processing procedure and specific limitation of the synchronization signal block transmission system are described in the foregoing embodiments, and are not described herein.
According to the synchronous signal block transmission system, a base station determines the sending frequency point of a synchronous signal block according to a preset dense synchronous grid, obtains the frequency point identification of the sending frequency point, sends the synchronous signal block to a terminal through the sending frequency point, and sends the frequency point identification to the terminal through a preset downlink narrow-band link; the terminal receives the frequency point identification sent by the base station through the downlink narrowband link, determines the receiving frequency point of the synchronous signal block according to the frequency point identification, and receives the synchronous signal block sent by the base station through the receiving frequency point, so that the searching time delay of the synchronous signal block can be reduced, the network access time can be reduced, the communication link between the sending frequency point and the receiving frequency point is less interfered, and the anti-interference capability of the synchronous signal block transmission can be improved.
In one embodiment, there is provided a synchronization signal block transmission apparatus including: the device comprises a sending frequency point determining module, a frequency point identifier obtaining module and a sending module, wherein:
the transmitting frequency point determining module is used for determining transmitting frequency points of the synchronous signal blocks according to a preset dense synchronous grid;
The frequency point identification acquisition module is used for acquiring the frequency point identification of the transmitting frequency point;
and the sending module is used for sending the synchronous signal block to a terminal through the sending frequency point, sending the frequency point identification to the terminal through a preset downlink narrowband link, so that the terminal can determine a receiving frequency point according to the frequency point identification, and receiving the synchronous signal block through the receiving frequency point.
In one embodiment, the sending frequency point determining module is further configured to obtain candidate frequency points of the synchronization signal block according to the dense synchronization grid; determining the candidate frequency point interference intensity of the candidate frequency point; comparing the candidate frequency point interference intensity with a preset interference intensity threshold value; and if the interference intensity of the candidate frequency points is below the interference intensity threshold, determining the candidate frequency points as the sending frequency points.
In an embodiment, the synchronization signal block transmission device is further configured to obtain a transmission frequency point interference strength of the transmission frequency point; comparing the interference intensity of the sending frequency point with the interference intensity threshold value; and if the interference intensity of the sending frequency point exceeds the interference intensity threshold, re-determining the sending frequency point of the synchronous signal block to obtain an updated sending frequency point, and sending the synchronous signal block through the updated sending frequency point.
In one embodiment, the downlink narrowband link in the sending module includes at least one of a downlink narrowband hopping link, a downlink narrowband spreading link, and a downlink narrowband low code rate link.
In one embodiment, there is provided a synchronization signal block transmission apparatus including: the device comprises a frequency point identification receiving module, a receiving frequency point determining module and a synchronous signal block receiving module, wherein:
the frequency point identification receiving module is used for receiving the frequency point identification sent by the base station through a preset downlink narrowband link;
the receiving frequency point determining module is used for determining the receiving frequency point of the synchronous signal block according to the frequency point identification;
and the synchronous signal block receiving module is used for receiving the synchronous signal block sent by the base station through the receiving frequency point.
In one embodiment, the synchronization signal block transmission device is further configured to receive, through the downlink narrowband link, an updated frequency point identifier sent by the base station; the updated frequency point identifier is a frequency point identifier of the updated transmitting frequency point; when the interference intensity of the sending frequency point exceeds a preset interference intensity threshold value, the base station redetermines the sending frequency point of the synchronous signal block to obtain the updated sending frequency point; and determining the receiving frequency point of the synchronous signal block according to the updated frequency point identification.
In one embodiment, the downlink narrowband link in the frequency point identification receiving module includes at least one of a downlink narrowband hopping link, a downlink narrowband spreading link, and a downlink narrowband low-code-rate link.
For specific limitations of the synchronization signal block transmission apparatus, reference may be made to the above limitations of the synchronization signal block transmission method, and no further description is given here. The above-described respective modules in the synchronization signal block transmission apparatus may be implemented in whole or in part by software, hardware, and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the communication device, or may be stored in software in a memory in the communication device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a communication device is provided, which may be a base station, and the internal structure of which may be as shown in fig. 8. The communication device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the communication device is configured to provide computing and control capabilities. The memory of the communication device includes a non-volatile storage medium, an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the communication device is used for storing the synchronization signal block transmission data. The network interface of the communication device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a synchronization signal block transmission method.
In one embodiment, a communication device is provided, which may be a terminal. The communication device comprises a processor, a memory, a communication interface, a display screen and an input means connected by a system bus. Wherein the processor of the communication device is configured to provide computing and control capabilities. The memory of the communication device includes a non-volatile storage medium, an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the communication device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a synchronization signal block transmission method. The display screen of the communication equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the communication equipment can be a touch layer covered on the display screen, can also be a key, a track ball or a touch pad arranged on the shell of the communication equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 8 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the communication device to which the present application is applied, and that a particular communication device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a communication device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of: determining a transmitting frequency point of the synchronous signal block according to a preset dense synchronous grid; acquiring a frequency point identifier of the transmitting frequency point; and transmitting the synchronous signal block to a terminal through the transmitting frequency point, transmitting the frequency point identification to the terminal through a preset downlink narrowband link, so that the terminal can determine a receiving frequency point according to the frequency point identification, and receiving the synchronous signal block through the receiving frequency point.
In one embodiment, the processor when executing the computer program further performs the steps of: obtaining candidate frequency points of the synchronous signal blocks according to the dense synchronous grids; determining the candidate frequency point interference intensity of the candidate frequency point; comparing the candidate frequency point interference intensity with a preset interference intensity threshold value; and if the interference intensity of the candidate frequency points is below the interference intensity threshold, determining the candidate frequency points as the sending frequency points.
In one embodiment, the processor when executing the computer program further performs the steps of: acquiring the interference intensity of the transmission frequency point; comparing the interference intensity of the sending frequency point with the interference intensity threshold value; and if the interference intensity of the sending frequency point exceeds the interference intensity threshold, re-determining the sending frequency point of the synchronous signal block to obtain an updated sending frequency point, and sending the synchronous signal block through the updated sending frequency point.
In one embodiment, the processor when executing the computer program further performs the steps of: the downlink narrowband link comprises at least one of a downlink narrowband hopping link, a downlink narrowband spreading link and a downlink narrowband low code rate link.
In one embodiment, a communication device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of: receiving a frequency point identifier sent by a base station through a preset downlink narrowband link; determining a receiving frequency point of the synchronous signal block according to the frequency point identification; and receiving the synchronous signal block sent by the base station through the receiving frequency point.
In one embodiment, the processor when executing the computer program further performs the steps of: receiving the updated frequency point identification sent by the base station through the downlink narrowband link; the updated frequency point identifier is a frequency point identifier of the updated transmitting frequency point; when the interference intensity of the sending frequency point exceeds a preset interference intensity threshold value, the base station redetermines the sending frequency point of the synchronous signal block to obtain the updated sending frequency point; and determining the receiving frequency point of the synchronous signal block according to the updated frequency point identification.
In one embodiment, the processor when executing the computer program further performs the steps of: the downlink narrowband link comprises at least one of a downlink narrowband hopping link, a downlink narrowband spreading link and a downlink narrowband low code rate link.
In one embodiment, a readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of: determining a transmitting frequency point of the synchronous signal block according to a preset dense synchronous grid; acquiring a frequency point identifier of the transmitting frequency point; and transmitting the synchronous signal block to a terminal through the transmitting frequency point, transmitting the frequency point identification to the terminal through a preset downlink narrowband link, so that the terminal can determine a receiving frequency point according to the frequency point identification, and receiving the synchronous signal block through the receiving frequency point.
In one embodiment, the computer program when executed by the processor further performs the steps of: obtaining candidate frequency points of the synchronous signal blocks according to the dense synchronous grids; determining the candidate frequency point interference intensity of the candidate frequency point; comparing the candidate frequency point interference intensity with a preset interference intensity threshold value; and if the interference intensity of the candidate frequency points is below the interference intensity threshold, determining the candidate frequency points as the sending frequency points.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring the interference intensity of the transmission frequency point; comparing the interference intensity of the sending frequency point with the interference intensity threshold value; and if the interference intensity of the sending frequency point exceeds the interference intensity threshold, re-determining the sending frequency point of the synchronous signal block to obtain an updated sending frequency point, and sending the synchronous signal block through the updated sending frequency point.
In one embodiment, the computer program when executed by the processor further performs the steps of: the downlink narrowband link comprises at least one of a downlink narrowband hopping link, a downlink narrowband spreading link and a downlink narrowband low code rate link.
In one embodiment, a readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of: receiving a frequency point identifier sent by a base station through a preset downlink narrowband link; determining a receiving frequency point of the synchronous signal block according to the frequency point identification; and receiving the synchronous signal block sent by the base station through the receiving frequency point.
In one embodiment, the computer program when executed by the processor further performs the steps of: receiving the updated frequency point identification sent by the base station through the downlink narrowband link; the updated frequency point identifier is a frequency point identifier of the updated transmitting frequency point; when the interference intensity of the sending frequency point exceeds a preset interference intensity threshold value, the base station redetermines the sending frequency point of the synchronous signal block to obtain the updated sending frequency point; and determining the receiving frequency point of the synchronous signal block according to the updated frequency point identification.
In one embodiment, the computer program when executed by the processor further performs the steps of: the downlink narrowband link comprises at least one of a downlink narrowband hopping link, a downlink narrowband spreading link and a downlink narrowband low code rate link.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A method for transmitting a synchronization signal block, the method comprising:
according to a preset dense synchronization grid, obtaining candidate frequency points of a synchronization signal block, and if the candidate frequency point interference intensity of the candidate frequency points is below a preset interference intensity threshold, determining the candidate frequency points as transmission frequency points of the synchronization signal block; the frequency interval between the dense synchronous grids is 0.5 times of the frequency interval between the carrier grids;
acquiring a frequency point identifier of the transmitting frequency point;
transmitting the synchronous signal block to a terminal through the transmitting frequency point, transmitting the frequency point identification to the terminal through a preset downlink narrowband link, so that the terminal can determine a receiving frequency point according to the frequency point identification, and receiving the synchronous signal block through the receiving frequency point;
And if the interference intensity of the transmitting frequency point exceeds the interference intensity threshold, re-determining the transmitting frequency point of the synchronous signal block to obtain an updated transmitting frequency point, and transmitting the synchronous signal block to the terminal through the updated transmitting frequency point.
2. The method according to claim 1, further comprising, before determining the candidate frequency point as the transmission frequency point of the synchronization signal block if the candidate frequency point interference strength of the candidate frequency point is below a preset interference strength threshold:
determining the candidate frequency point interference intensity of the candidate frequency point;
and comparing the candidate frequency point interference strength with the interference strength threshold.
3. The method according to claim 1, wherein before determining the transmission frequency point of the synchronization signal block again if the transmission frequency point interference strength of the transmission frequency point exceeds the interference strength threshold value, obtaining an updated transmission frequency point, and transmitting the synchronization signal block to the terminal through the updated transmission frequency point, further comprising:
acquiring the interference intensity of the transmission frequency point;
And comparing the interference intensity of the sending frequency point with the interference intensity threshold value.
4. The method of claim 1, wherein the downlink narrowband link comprises at least one of a downlink narrowband hopping link, a downlink narrowband spreading link, and a downlink narrowband low code rate link.
5. A method for transmitting a synchronization signal block, the method comprising:
receiving a frequency point identifier sent by a base station through a preset downlink narrowband link; the base station obtains candidate frequency points of a synchronous signal block according to a preset dense synchronous grid, if the candidate frequency point interference intensity of the candidate frequency points is below a preset interference intensity threshold value, the candidate frequency points are determined to be the sending frequency points of the synchronous signal block, frequency point identifiers of the sending frequency points are obtained, the synchronous signal block is sent to a terminal through the sending frequency points, and the frequency point identifiers are sent to the terminal through the downlink narrow-band link; the frequency interval between the dense synchronous grids is 0.5 times of the frequency interval between the carrier grids;
determining a receiving frequency point of the synchronous signal block according to the frequency point identification;
Receiving the synchronous signal block sent by the base station through the receiving frequency point; and when the interference intensity of the sending frequency point exceeds the interference intensity threshold, the base station re-determines the sending frequency point of the synchronous signal block to obtain an updated sending frequency point, and sends the synchronous signal block to the terminal through the updated sending frequency point.
6. The synchronization signal block transmission method according to claim 5, further comprising:
receiving the updated frequency point identification sent by the base station through the downlink narrowband link; the updated frequency point identifier is a frequency point identifier of the updated transmitting frequency point;
and determining the receiving frequency point of the synchronous signal block according to the updated frequency point identification.
7. The method of claim 5, wherein the downlink narrowband link comprises at least one of a downlink narrowband hopping link, a downlink narrowband spreading link, and a downlink narrowband low code rate link.
8. A synchronous signal block transmission system, characterized in that the system comprises a base station and a terminal;
the base station is configured to obtain candidate frequency points of a synchronization signal block according to a preset dense synchronization grid, determine the candidate frequency points as transmission frequency points of the synchronization signal block if the candidate frequency point interference strength of the candidate frequency points is below a preset interference strength threshold, and obtain frequency point identifiers of the transmission frequency points; the frequency interval between the dense synchronous grids is 0.5 times of the frequency interval between the carrier grids;
The base station is further configured to send the synchronization signal block to a terminal through the sending frequency point, and send the frequency point identifier to the terminal through a preset downlink narrowband link;
the terminal is configured to receive, through the downlink narrowband link, the frequency point identifier sent by the base station, and determine, according to the frequency point identifier, a reception frequency point of the synchronization signal block;
the terminal is further configured to receive, through the receiving frequency point, the synchronization signal block sent by the base station;
the base station is further configured to, when the interference intensity of the transmission frequency point exceeds the interference intensity threshold, redetermine the transmission frequency point of the synchronization signal block, obtain an updated transmission frequency point, and send the synchronization signal block to the terminal through the updated transmission frequency point.
9. A communication device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A readable storage medium having stored thereon a computer program, which when executed by a processor realizes the steps of the method according to any of claims 1 to 7.
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