CN116669214A - Method and device for determining center frequency point of synchronous signal block - Google Patents

Method and device for determining center frequency point of synchronous signal block Download PDF

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Publication number
CN116669214A
CN116669214A CN202310882503.5A CN202310882503A CN116669214A CN 116669214 A CN116669214 A CN 116669214A CN 202310882503 A CN202310882503 A CN 202310882503A CN 116669214 A CN116669214 A CN 116669214A
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China
Prior art keywords
signal block
frequency
target
synchronous signal
determining
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Inventor
吴迪
曾晓龙
周瑞
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Sunwave Communications Co Ltd
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Sunwave Communications Co Ltd
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Priority to CN202310882503.5A priority Critical patent/CN116669214A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
    • H04W74/0891—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access for synchronized access
    • 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 application discloses a method and a device for determining a center frequency point of a synchronous signal block, a storage medium and an electronic device, wherein the method comprises the following steps: acquiring a target frequency band, wherein the target frequency band is a frequency band added in a new wireless network; determining a frequency range of a target synchronous signal block matched with a target frequency band according to an absolute frequency point number of the target frequency band, wherein the first association relationship is a relationship between a synchronous signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth; generating a synchronous signal block center frequency of a target frequency band according to the frequency range of the target synchronous signal block; the technical scheme is adopted to convert the center frequency of the synchronous signal block into the center frequency point of the synchronous signal block of the target frequency band, so that the problems of low determination efficiency of the center frequency point of the synchronous signal block and the like in the related technology are solved.

Description

Method and device for determining center frequency point of synchronous signal block
Technical Field
The present application relates to the field of communications, and in particular, to a method and apparatus for determining a center frequency point of a synchronization signal block, a storage medium, and an electronic device.
Background
SSB is an abbreviation of synchronization signal and PBCH block (Synchronization Signal and PBCH block), which consists of a primary synchronization signal (Primary Synchronization Signals, abbreviated PSS), a secondary synchronization signal (Secondary Synchronization Signals, abbreviated SSS), PBCH and its associated DMRS (Demodulation Reference Signal ). To access an NR network, a UE (User Equipment) must undergo a process of cell search, obtaining cell system information, random access, and the like. In NR, UE performs cell search through synchronization signal PSS/SSS to obtain physical layer cell ID (PCI) and downlink frequency synchronization of cell. Then the UE obtains the most dominant system information of the cell and information how to receive other system information (SIB 1) by receiving the PBCH and reading the system information MIB. After receiving the PBCH, the UE can acquire downlink timing information (including the system frame number, the position of subframe 0, etc.) of the cell, so as to obtain downlink time synchronization. The UE can then obtain information on how the cell works and how to access the cell by receiving other system information (including SIB1 and SI messages). Next, the UE initiates a random access procedure to acquire uplink synchronization and establish an RRC connection with the network. In the process, the SSB center frequency point plays a crucial role for the UE to access the cell.
In the related art, fixed SSB center frequency points are set according to deployed frequency bands, so that the current NR system mainly supports a plurality of fixed frequency points, but with the expansion of NR services, more NR services need to support more frequency bands, but this mode cannot be used for all cell search scenarios, and in practical use, expansibility and suitability are low.
Aiming at the problems of low efficiency of determining the center frequency point of the synchronous signal block and the like in the related art, no effective solution is proposed yet.
Disclosure of Invention
The embodiment of the application provides a method and a device for determining a center frequency point of a synchronous signal block, a storage medium and an electronic device, which are used for at least solving the problems of low efficiency and the like in the prior art of determining the center frequency point of the synchronous signal block.
According to an embodiment of the present application, there is provided a method for determining a center frequency point of a synchronization signal block, including: acquiring a target frequency band, wherein the target frequency band is a frequency band added in a new wireless network; determining a target synchronous signal block frequency range matched with the target frequency band according to an absolute frequency point number of the target frequency band, wherein the first association relationship is a relationship between a synchronous signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth; generating a synchronous signal block center frequency of the target frequency band according to the target synchronous signal block frequency range; and converting the center frequency of the synchronous signal block into the center frequency point of the synchronous signal block of the target frequency band.
Optionally, the determining, according to the absolute frequency point number of the target frequency band, the target synchronization signal block frequency range matched with the target frequency band according to the first association relationship and the second association relationship includes: calculating a target frequency value according to the absolute frequency point number, wherein the target frequency value is a frequency value corresponding to a common reference band point of a resource block grid; and determining the frequency range of the target synchronous signal block according to the target frequency value, the first association relation and the second association relation.
Optionally, the determining the target synchronization signal block frequency range according to the target frequency value, the first association relationship and the second association relationship includes: determining a first synchronous signal block frequency range according to the target frequency value and the first association relation, and determining a second synchronous signal block frequency range according to the target frequency value and the second association relation; and acquiring an intersection of the first synchronous signal block frequency range and the second synchronous signal block frequency range to obtain the target synchronous signal block frequency range.
Optionally, the determining the first synchronization signal block frequency range according to the target frequency value and the first association relation includes: determining the first synchronization signal block frequency range by the following formula:
wherein SSB is start For the frequency lower edge of the synchronous signal block, F SSB1 For the first synchronization signal block frequency, F PointA For the target frequency value, SSB end For the upper frequency edge of the synchronous signal block, F REF Is absolute frequency, N RB For the number of resource blocks,each resource block contains the number of subcarriers.
Optionally, the determining the second synchronization signal block frequency range according to the target frequency value and the second association relation includes: determining the second synchronization signal block frequency range by the following formula:
wherein the frequency down edge SSB of the synchronization signal block is determined by the following formula start ： F SSB2 For the second synchronous signal block frequency, F PointA For the target frequency value, F REF Is absolute frequency, N RB For the number of resource blocks>Is that each resource block contains the number of sub-carriers, CORESET0 start CORESET0 for the starting position of the control resource set end For ending the set of control resourcesPosition, K SSB Is a subcarrier offset.
Optionally, the generating the synchronization signal block center frequency according to the target synchronization signal block frequency range includes: constructing a synchronous signal block reference frequency range calculation formula by using the synchronous signal block frequency range; and carrying out optimizing calculation on the calculation formula of the reference frequency range of the synchronous signal block to obtain the center frequency of the synchronous signal block.
Optionally, the optimizing calculation is performed on the calculation formula of the reference frequency range of the synchronization signal block to obtain the center frequency of the synchronization signal block, including: calculating the calculation formula of the reference frequency range of the synchronous signal block to obtain a parameter range of a target parameter, wherein the target parameter is used for representing the offset of the reference frequency relative to a target reference point; determining a minimum parameter value in the parameter range as a target parameter value of the target parameter; and solving a reference frequency calculation formula by using the target parameter value to obtain the center frequency of the synchronous signal block.
According to another embodiment of the present application, there is further provided a device for determining a center frequency point of a synchronization signal block, including: the acquisition module is used for acquiring a target frequency band, wherein the target frequency band is a frequency band added in a new wireless network; the determining module is used for determining a target synchronous signal block frequency range matched with the target frequency band according to the absolute frequency point number of the target frequency band, wherein the first association relationship is a relationship between a synchronous signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth; the generation module is used for generating the center frequency of the synchronous signal block of the target frequency band according to the frequency range of the target synchronous signal block; and the conversion module is used for converting the center frequency of the synchronous signal block into the center frequency point of the synchronous signal block of the target frequency band.
According to still another aspect of the embodiments of the present application, there is also provided a computer-readable storage medium having a computer program stored therein, wherein the computer program is configured to perform the above method for determining a center frequency point of a synchronization signal block when running.
According to still another aspect of the embodiment of the present application, there is further provided an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the method for determining the center frequency point of the synchronization signal block by using the computer program.
In the embodiment of the application, a target frequency band is acquired, wherein the target frequency band is a frequency band added in a new wireless network; determining a target synchronous signal block frequency range matched with the target frequency band according to an absolute frequency point number of the target frequency band, wherein the first association relationship is a relationship between a synchronous signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth; generating a synchronous signal block center frequency of the target frequency band according to the target synchronous signal block frequency range; the center frequency of the synchronous signal block is converted into a synchronous signal block center frequency point of the target frequency band, namely a first association relation is formed between the synchronous signal block and the system bandwidth, a second management relation is formed between the control resource set and the system bandwidth, and further after the target frequency band is acquired, a target synchronous signal block frequency range matched with the target frequency band can be determined according to an absolute frequency point number of the target frequency band, the first management relation and the second management relation, and further a synchronous signal block center frequency component of the target frequency band can be generated according to the synchronous signal block frequency range, and further the synchronous signal block center frequency is converted into a corresponding frequency point identifier, so that the synchronous signal block center frequency point is obtained. By adopting the technical scheme, the problems of lower determination efficiency of the center frequency point of the synchronous signal block and the like in the related technology are solved, and the technical effect of improving the determination efficiency of the center frequency point of the synchronous signal block is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of a hardware environment of a method for determining a center frequency point of a synchronization signal block according to an embodiment of the present application;
fig. 2 is a flowchart of a method for determining a center frequency point of a synchronization signal block according to an embodiment of the present application;
FIG. 3 is an alternative device interaction schematic in accordance with an embodiment of the application;
FIG. 4 is a schematic diagram of an alternative target synchronization signal block frequency range determination according to an embodiment of the present application;
FIG. 5 is a schematic diagram of an alternative system bandwidth according to an embodiment of the application;
FIG. 6 is a center frequency calculation flow diagram of an alternative SSB according to an embodiment of the application;
FIG. 7 is an alternative target frequency value conversion schematic in accordance with an embodiment of the application;
fig. 8 is a block diagram of a device for determining a center frequency point of a synchronization signal block according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The method embodiments provided by the embodiments of the present application may be performed in a computer terminal, a device terminal, or a similar computing apparatus. Taking a computer terminal as an example, fig. 1 is a schematic diagram of a hardware environment of a method for determining a center frequency point of a synchronization signal block according to an embodiment of the present application. As shown in fig. 1, the computer terminal may include one or more (only one is shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data, and in one exemplary embodiment, may also include a transmission device 106 for communication functions and an input-output device 108. It will be appreciated by those skilled in the art that the configuration shown in fig. 1 is merely illustrative and is not intended to limit the configuration of the computer terminal described above. For example, a computer terminal may also include more or fewer components than shown in FIG. 1, or have a different configuration than the equivalent functions shown in FIG. 1 or more than the functions shown in FIG. 1.
The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a method for sending message push in an embodiment of the present application, and the processor 102 executes the computer program stored in the memory 104, thereby performing various functional applications and data processing, that is, implementing the method described above. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the computer terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of a computer terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is configured to communicate with the internet wirelessly.
In this embodiment, a method for determining a center frequency point of a synchronization signal block is provided, and fig. 2 is a flowchart of a method for determining a center frequency point of a synchronization signal block according to an embodiment of the present application, where the flowchart includes the following steps:
step S202, a target frequency band is obtained, wherein the target frequency band is a frequency band added in a new wireless network;
step S204, determining a target synchronous signal block frequency range matched with the target frequency band according to an absolute frequency point number of the target frequency band, wherein the first association relationship is a relationship between a synchronous signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth;
step S206, generating the center frequency of the synchronous signal block of the target frequency band according to the frequency range of the target synchronous signal block
Step S208, converting the center frequency of the synchronous signal block into the center frequency point of the synchronous signal block of the target frequency band.
Through the steps, a first association relation is arranged between the synchronous signal block and the system bandwidth, a second management relation is arranged between the control resource set and the system bandwidth, and further after the target frequency band is obtained, the frequency range of the target synchronous signal block matched with the target frequency band can be determined according to the absolute frequency point number of the target frequency band, the first management relation and the second management relation, and further the center frequency component of the synchronous signal block of the target frequency band can be generated according to the frequency range of the synchronous signal block, and further the center frequency of the synchronous signal block is converted into a corresponding frequency point identifier, so that the center frequency point of the synchronous signal block is obtained. By adopting the technical scheme, the problems of lower determination efficiency of the center frequency point of the synchronous signal block and the like in the related technology are solved, and the technical effect of improving the determination efficiency of the center frequency point of the synchronous signal block is realized.
In the technical solution provided in step S202, the target frequency band may be, but is not limited to, determined according to the communication scenario and the communication requirement, and may be, but is not limited to, a frequency band including N40, N48, N77, N78, etc.
In the technical solution provided in step S204, the absolute frequency point number of the target frequency band may be an absolute frequency point number corresponding to the target frequency band determined from the frequency band and the absolute frequency point number having a corresponding relationship.
Optionally, in this embodiment, the target synchronization signal block frequency range may be obtained by using an absolute frequency point number of the target frequency band to perform optimization calculation on the first association relationship and the second association relationship, or may also be obtained by calculating a first synchronization signal block frequency range according to the absolute frequency point number and the first association relationship, and calculating a second synchronization signal block frequency range according to the absolute frequency point number and the second association relationship, so as to obtain an intersection of the first synchronization signal block frequency range and the second synchronization signal block frequency range, where the method is not limited in this aspect.
In the technical solution provided in step S206, the center frequency of the synchronization signal block may be obtained by optimizing the frequency in the frequency range of the target synchronization signal block, for example, the minimum value in the frequency range of the target synchronization signal block is determined as the center frequency of the synchronization signal block, which is not limited in this solution.
In the technical solution provided in step S208, the center frequency point of the synchronization signal block may be, but is not limited to, calculated by the following formula:
F REF ＝F REF-Offs +ΔF Global (N–N REF-Offs )
wherein F is REF For synchronizing signal block center frequency, ΔF Global For the variation of global frame interval, F REF-Offs Indicating the offset in time of the FREF signal relative to a particular reference point, N REF-Offs Refers to the offset of the NR reference signal relative to the boundary of the Resource Block (RB), and N is the center frequency point of the synchronization signal block.
The embodiment of the application can be applied to a cell search scene when the UE is to access an NR network, wherein the UE equipment can be but is not limited to a mobile phone, an intelligent wearable device, a tablet computer and the like, and fig. 3 is an optional equipment interaction schematic diagram according to the embodiment of the application, and as shown in fig. 3, the user equipment is accessed to the NR network through cell search when accessing to the NR network.
As an optional embodiment, the determining, according to the absolute frequency point number of the target frequency band, the target synchronization signal block frequency range that the target frequency band matches according to the first association relationship and the second association relationship includes:
calculating a target frequency value according to the absolute frequency point number, wherein the target frequency value is a frequency value corresponding to a common reference band point of a resource block grid;
and determining the frequency range of the target synchronous signal block according to the target frequency value, the first association relation and the second association relation.
Alternatively, in this embodiment, the target frequency value may be calculated by the following formula:
wherein F is REF Is the frequency representation of the given uplink and downlink central frequency points, N RB Is the number of RBs corresponding to the bandwidth,is that each RB contains the number of subcarriers, the current configuration fixed size is 12, Δf=2 μ ·15[kHz]Mu currently takes 1, i.e. Δf=30 (KHz), F PointA Is the target frequency value.
Optionally, in this embodiment, the target synchronization signal block frequency range may be obtained by using a target frequency value to perform optimizing calculation on the first association relationship and the second association relationship, or may also be obtained by calculating a first synchronization signal block frequency range according to the target frequency value and the first association relationship, and calculating a second synchronization signal block frequency range according to an absolute frequency point number and the second association relationship, so as to obtain an intersection of the first synchronization signal block frequency range and the second synchronization signal block frequency range, which is not limited in this scheme.
As an optional embodiment, the determining the target synchronization signal block frequency range according to the target frequency value, the first association relationship, and the second association relationship includes:
determining a first synchronous signal block frequency range according to the target frequency value and the first association relation, and determining a second synchronous signal block frequency range according to the target frequency value and the second association relation;
and acquiring an intersection of the first synchronous signal block frequency range and the second synchronous signal block frequency range to obtain the target synchronous signal block frequency range.
Optionally, in this embodiment, in order to satisfy the entire bandwidth of the SSB within the system bandwidth range and satisfy the constraint relation between the SSB, CORESET0, and the entire system bandwidth, the first synchronization signal block frequency range and the second synchronization signal block frequency range are intersected so that the calculated SSB simultaneously satisfies the above condition, fig. 4 is an optional target synchronization signal block frequency range determining schematic diagram according to an embodiment of the present application, and as shown in fig. 4, the first synchronization signal block frequency range is determined according to the target frequency value and the first association relation, and the second synchronization signal block frequency range is determined according to the target frequency value and the second association relation, and the two synchronization signal frequency ranges are intersected so that the synchronization signal block frequencies in the final obtained frequency range all satisfy the constraint condition.
Alternatively, in this embodiment, when determining the frequency range of the first synchronization signal block, the principle that the entire bandwidth of the SSB must be within the system bandwidth is required.
Optionally, in this embodiment, in determining the second synchronization signal block frequency range, the relationship between SSB, CORESET0 (control resource set) and the whole bandwidth needs to be considered, fig. 5 is a schematic diagram of an alternative system bandwidth according to an embodiment of the present application, as shown in fig. 5, and the meaning and setting of offset in the above diagram can be known from chapter 13 of protocol 38.213, for example, we currently implement a configuration that the SSB and PDCCH are both 30kHz, and parameter selection is performed according to table 1:
TABLE 1
The frequency domain start position of CORESET0 is also greater than PointA and the end position is lower than the system bandwidth frequency maximum, and the bandwidth of CORESET0 is expressed as the set index lookup table.
As an optional embodiment, the determining the first synchronization signal block frequency range according to the target frequency value and the first association relation includes:
determining the first synchronization signal block frequency range by the following formula:
wherein SSB is start For the frequency lower edge of the synchronous signal block, F SSB1 For the first partyStep signal block frequency, F PointA For the target frequency value, SSB end For the upper frequency edge of the synchronous signal block, F REF Is absolute frequency, N RB For the number of resource blocks,each resource block contains the number of subcarriers.
As an optional embodiment, the determining the second synchronization signal block frequency range according to the target frequency value and the second association relation includes:
determining the second synchronization signal block frequency range by the following formula:
wherein the frequency down edge SSB of the synchronization signal block is determined by the following formula start ：SSB start ＝F SSB2 -F SSB2 For the second synchronous signal block frequency, F PointA For the target frequency value, F REF Is absolute frequency, N RB For the number of resource blocks>Is that each resource block contains the number of sub-carriers, CORESET0 start CORESET0 for the starting position of the control resource set end For the end position of the control resource set, K SSB Is a subcarrier offset.
Optionally, in the present embodiment, the protocol specifies K SSB The subcarrier spacing is Δf' =15khz, k SSB The range of the value of (2) is 0-23. Then needs to meet the channel grid condition withoutUnlike step size for the same frequency band, table 2 is an alternative channel trellis table according to an embodiment of the present application, as shown in table 2:
TABLE 2
/>
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As an alternative embodiment, the generating the synchronization signal block center frequency according to the target synchronization signal block frequency range includes:
constructing a synchronous signal block reference frequency range calculation formula by using the synchronous signal block frequency range;
and carrying out optimizing calculation on the calculation formula of the reference frequency range of the synchronous signal block to obtain the center frequency of the synchronous signal block.
Optionally, in this embodiment, the center frequency of the synchronization signal block is required to satisfy a synchronization grid condition, and thus a calculation formula of a reference frequency range of the synchronization signal block may be constructed according to the condition, and table 3 is an optional GSCN value-frequency correspondence table according to an embodiment of the present application, as shown in table 3:
TABLE 3 Table 3
And then, a synchronous signal block reference Frequency range calculation formula can be constructed according to the characterization content, for example, a corresponding SS Block Frequency position SSREF formula is selected according to the current Frequency range, and then, the synchronous signal block reference Frequency range calculation formula is constructed.
As an optional embodiment, the optimizing calculation of the reference frequency range calculation formula of the synchronization signal block to obtain the center frequency of the synchronization signal block includes:
calculating the calculation formula of the reference frequency range of the synchronous signal block to obtain a parameter range of a target parameter, wherein the target parameter is used for representing the offset of the reference frequency relative to a target reference point;
determining a minimum parameter value in the parameter range as a target parameter value of the target parameter;
and solving a reference frequency calculation formula by using the target parameter value to obtain the center frequency of the synchronous signal block.
Optionally, in this embodiment, according to 5.4.3.1 of the communication protocol 38.101, when the Frequency range is 0-3000MHz, the corresponding formula is n×1200khz+m×50khz, where the target parameter includes N and M, and when the Frequency range is 3000-24250MHz, the corresponding formula is 3000mhz+n×1.44MHz, where the target parameter includes N.
Alternatively, in this embodiment, the target parameter is calculated and then is carried into the corresponding SS Block frequency position SSREF calculation formula recorded in 5.4.3.1 table of the communication protocol 38.101 to obtain the center frequency of the synchronization signal block.
In the application, F when the uplink and downlink center frequency points are known REF Are known; bandwidth is known, N RB Are also known; index of CORESET0 can be set in advance so that after look-up table, offset andare known. F (F) SSB Expressed by N (or N and M) in combination with Table 5.4.3.1-1 and Table 5.4.2.1-1, the method can meet the requirements of channel grid and synchronization grid step length under the conditions that the whole bandwidth of SSB must be within the system bandwidth range and the constraint relation among SSB, CORESET0 and the whole system bandwidth is metDeriving the range of N, generally taking the minimum value of N as the center frequency point of the SSB actually used, fig. 6 is an optional flowchart of calculating the center frequency point of the SSB according to an embodiment of the present application, as shown in fig. 6, at least including the following steps:
s601, acquiring a corresponding target frequency value of an uplink and downlink center frequency point;
s602, the entire bandwidth of the SSB must be within the system bandwidth,
the frequency domain of SSB fixes 20 RBs, so,
the lower frequency edge of SSB is denoted as
The frequency upper edge of SSB is expressed as
S603, the frequency domain start position of CORESET0 is also larger than PointA, the end position is lower than the maximum frequency of the system bandwidth, and the bandwidth of CORESET0 is expressed asThe starting position of CORESET0 can be expressed as:
the end position of CORESET0 can be expressed as:
s604, because the calculated SSB center frequency point needs to meet the channel grid condition and the synchronization grid condition, the calculated SSB center frequency point can be returned to the value range of N by combining the table 5.4.2.3-1 of the communication protocol 38.101 and the table 5.4.3.1 of the communication protocol 38.101;
s605, taking the minimum value of N, and converting N into SS REF 。
In practical use, the uplink and downlink center frequency points are represented as N REF By converting it to obtain a target frequency value, fig. 7 is an alternative target frequency value conversion schematic diagram according to an embodiment of the present application, as shown in fig. 7:
the uplink and downlink central frequency points are expressed as N REF The center frequency point that is commonly used is usually expressed in terms of frequency, which involves the conversion between frequency and ARFCN, and also the concept of a frequency grid. The frequency point F is obtained by the following formula and 5.4.2.1 of the protocol 38.101 REF ：
F REF ＝F REF-Offs +ΔF Global (N REF –N REF-Offs )
Table 4 is an alternative frequency grid table according to an embodiment of the application.
TABLE 4 Table 4
Different frequency ranges are calculated using different values substituted into the formula. The frequency point of PointA is the frequency value of the uplink and downlink central frequency point minus 1/2 of the bandwidth, namely:
wherein F is REF Is the frequency representation of the given uplink and downlink central frequency points, N RB Is the number of RBs corresponding to the bandwidth,is that each RB contains the number of subcarriers, the current configuration fixed size is 12, Δf=2 μ ·15[kHz]Currently μ takes 1, i.e. Δf=30 (KHz).
The number of RBs corresponding to different bandwidths is shown in table 5:
TABLE 5
In order to better understand the above process, the following description of the above process is provided with reference to an alternative embodiment, but is not limited to the technical solution of the embodiment of the present application.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software and a necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of the various embodiments of the present application.
Fig. 8 is a block diagram of a device for determining a center frequency point of a synchronization signal block according to an embodiment of the present application; as shown in fig. 8, includes:
an obtaining module 82, configured to obtain a target frequency band, where the target frequency band is a frequency band added in a new wireless network;
a determining module 84, configured to determine, according to an absolute frequency point number of the target frequency band, a target synchronization signal block frequency range that is matched with the target frequency band according to a first association relationship and a second association relationship, where the first association relationship is a relationship between a synchronization signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth;
a generating module 86, configured to generate a synchronization signal block center frequency of the target frequency band according to the target synchronization signal block frequency range;
and the conversion module 88 is configured to convert the center frequency of the synchronization signal block into a center frequency point of the synchronization signal block in the target frequency band.
Through the first association relation between the synchronous signal block and the system bandwidth and the second management relation between the control resource set and the system bandwidth, after the target frequency band is obtained, the frequency range of the target synchronous signal block matched with the target frequency band can be determined according to the absolute frequency point number of the target frequency band, the first management relation and the second management relation, and then the central frequency component of the synchronous signal block of the target frequency band can be generated according to the frequency range of the synchronous signal block, and then the central frequency of the synchronous signal block is converted into the corresponding frequency point identifier, so that the central frequency point of the synchronous signal block is obtained. By adopting the technical scheme, the problems of lower determination efficiency of the center frequency point of the synchronous signal block and the like in the related technology are solved, and the technical effect of improving the determination efficiency of the center frequency point of the synchronous signal block is realized.
Optionally, the determining module includes:
the calculating unit is used for calculating a target frequency value according to the absolute frequency point number, wherein the target frequency value is a frequency value corresponding to a common reference band point of the resource block grid;
and the determining unit is used for determining the frequency range of the target synchronous signal block according to the target frequency value, the first association relation and the second association relation.
Optionally, the determining unit is configured to:
determining a first synchronous signal block frequency range according to the target frequency value and the first association relation, and determining a second synchronous signal block frequency range according to the target frequency value and the second association relation;
and acquiring an intersection of the first synchronous signal block frequency range and the second synchronous signal block frequency range to obtain the target synchronous signal block frequency range.
Optionally, the determining unit is configured to:
determining the first synchronization signal block frequency range by the following formula:
wherein SSB is start For the frequency lower edge of the synchronous signal block, F SSB1 For the first synchronization signal block frequency, F PointA For the target frequency value, SSB end For the upper frequency edge of the synchronous signal block, F REF Is absolute frequency, N RB For the number of resource blocks,each resource block contains the number of subcarriers.
Optionally, the determining unit is configured to:
determining the second synchronization signal block frequency range by the following formula:
wherein the frequency down edge SSB of the synchronization signal block is determined by the following formula start ： F SSB2 For the second synchronous signal block frequency, F PointA For the target frequency value, F REF Is absolute frequency, N RB For the number of resource blocks>Is that each resource block contains the number of sub-carriers，CORESET0 start CORESET0 for the starting position of the control resource set end For the end position of the control resource set, K SSB Is a subcarrier offset.
Optionally, the generating module includes:
a construction unit for constructing a synchronization signal block reference frequency range calculation formula using the synchronization signal block frequency range;
and the calculating unit is used for carrying out optimizing calculation on the calculation formula of the reference frequency range of the synchronous signal block to obtain the center frequency of the synchronous signal block.
Optionally, the computing unit is configured to:
calculating the calculation formula of the reference frequency range of the synchronous signal block to obtain a parameter range of a target parameter, wherein the target parameter is used for representing the offset of the reference frequency relative to a target reference point;
determining a minimum parameter value in the parameter range as a target parameter value of the target parameter;
and solving a reference frequency calculation formula by using the target parameter value to obtain the center frequency of the synchronous signal block.
The embodiment of the application also provides a storage medium, which comprises a stored program, wherein the program executes the method for determining the center frequency point of any one of the synchronous signal blocks.
Alternatively, in the present embodiment, the above-described storage medium may be configured to store program code for performing the steps of: acquiring a target frequency band, wherein the target frequency band is a frequency band added in a new wireless network;
determining a target synchronous signal block frequency range matched with the target frequency band according to an absolute frequency point number of the target frequency band, wherein the first association relationship is a relationship between a synchronous signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth;
generating a synchronous signal block center frequency of the target frequency band according to the target synchronous signal block frequency range;
and converting the center frequency of the synchronous signal block into the center frequency point of the synchronous signal block of the target frequency band.
The embodiment of the application also provides an electronic device comprising a memory and a processor, the memory storing a computer program, the processor being arranged to run the computer program to perform the steps of the method embodiment of determining the center frequency of any one of the synchronization signal blocks.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, where the transmission device is connected to the processor, and the input/output device is connected to the processor.
Alternatively, in the present embodiment, the above-described processor may be configured to execute the following steps by a computer program: acquiring a target frequency band, wherein the target frequency band is a frequency band added in a new wireless network;
determining a target synchronous signal block frequency range matched with the target frequency band according to an absolute frequency point number of the target frequency band, wherein the first association relationship is a relationship between a synchronous signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth;
generating a synchronous signal block center frequency of the target frequency band according to the target synchronous signal block frequency range;
and converting the center frequency of the synchronous signal block into the center frequency point of the synchronous signal block of the target frequency band.
Alternatively, in the present embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and optional implementations, and this embodiment is not described herein.
It will be appreciated by those skilled in the art that the modules or steps of the application described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may alternatively be implemented in program code executable by computing devices, so that they may be stored in a memory device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.

Claims (10)

1. The method for determining the center frequency point of the synchronous signal block is characterized by comprising the following steps of:
acquiring a target frequency band, wherein the target frequency band is a frequency band added in a new wireless network;
determining a target synchronous signal block frequency range matched with the target frequency band according to an absolute frequency point number of the target frequency band, wherein the first association relationship is a relationship between a synchronous signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth;
generating a synchronous signal block center frequency of the target frequency band according to the target synchronous signal block frequency range;
and converting the center frequency of the synchronous signal block into the center frequency point of the synchronous signal block of the target frequency band.
2. The method of claim 1, wherein the determining, according to the absolute frequency point number of the target frequency band, the target synchronization signal block frequency range that the target frequency band matches according to the first association relationship and the second association relationship comprises:
calculating a target frequency value according to the absolute frequency point number, wherein the target frequency value is a frequency value corresponding to a common reference band point of a resource block grid;
and determining the frequency range of the target synchronous signal block according to the target frequency value, the first association relation and the second association relation.
3. The method of claim 2, wherein said determining the target synchronization signal block frequency range from the target frequency value, the first association relationship, and the second association relationship comprises:
determining a first synchronous signal block frequency range according to the target frequency value and the first association relation, and determining a second synchronous signal block frequency range according to the target frequency value and the second association relation;
and acquiring an intersection of the first synchronous signal block frequency range and the second synchronous signal block frequency range to obtain the target synchronous signal block frequency range.
4. The method of claim 3, wherein said determining a first synchronization signal block frequency range from said target frequency value and said first association comprises:
determining the first synchronization signal block frequency range by the following formula:
wherein the method comprises the steps of，SSB start For the frequency lower edge of the synchronous signal block, F SSB1 For the first synchronization signal block frequency, F PointA For the target frequency value, SSB end For the upper frequency edge of the synchronous signal block, F REF Is absolute frequency, N RB For the number of resource blocks,each resource block contains the number of subcarriers.
5. A method according to claim 3, wherein said determining a second synchronization signal block frequency range from said target frequency value and said second association relation comprises:
determining the second synchronization signal block frequency range by the following formula:
wherein the frequency down edge SSB of the synchronization signal block is determined by the following formula start ： F SSB2 For the second synchronous signal block frequency, F PointA For the target frequency value, F REF Is absolute frequency, N RB For the number of resource blocks>Is that each resource block contains the number of sub-carriers, CORESET0 start For controlling theInitial position of resource set, CORESET0 end For the end position of the control resource set, K SSB Is a subcarrier offset.
6. The method of claim 1, wherein said generating the synchronization signal block center frequency from the target synchronization signal block frequency range comprises:
constructing a synchronous signal block reference frequency range calculation formula by using the synchronous signal block frequency range;
and carrying out optimizing calculation on the calculation formula of the reference frequency range of the synchronous signal block to obtain the center frequency of the synchronous signal block.
7. The method of claim 6, wherein the optimizing the reference frequency range calculation formula of the synchronization signal block to obtain the center frequency of the synchronization signal block comprises:
calculating the calculation formula of the reference frequency range of the synchronous signal block to obtain a parameter range of a target parameter, wherein the target parameter is used for representing the offset of the reference frequency relative to a target reference point;
determining a minimum parameter value in the parameter range as a target parameter value of the target parameter;
and solving a reference frequency calculation formula by using the target parameter value to obtain the center frequency of the synchronous signal block.
8. A device for determining a center frequency point of a synchronization signal block, comprising:
the acquisition module is used for acquiring a target frequency band, wherein the target frequency band is a frequency band added in a new wireless network;
the determining module is used for determining a target synchronous signal block frequency range matched with the target frequency band according to the absolute frequency point number of the target frequency band, wherein the first association relationship is a relationship between a synchronous signal block and a system bandwidth, and the second association relationship is a relationship between a control resource set and the system bandwidth;
the generation module is used for generating the center frequency of the synchronous signal block of the target frequency band according to the frequency range of the target synchronous signal block;
and the conversion module is used for converting the center frequency of the synchronous signal block into the center frequency point of the synchronous signal block of the target frequency band.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program when run performs the method of any one of claims 1 to 7.
10. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to execute the method according to any of claims 1 to 7 by means of the computer program.
CN202310882503.5A 2023-07-18 2023-07-18 Method and device for determining center frequency point of synchronous signal block Pending CN116669214A (en)

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