Method for determining downlink-synchronization-signal frequency position

Abstract

Provided in the embodiments of the present disclosure is a method for determining a downlink-synchronization-signal frequency position. The method comprises: determining a downlink-synchronization-signal frequency position on the basis of a first frequency position and a frequency offset; and on the basis of the downlink-synchronization-signal frequency position, transmitting a downlink synchronization signal.

Description

Method for determining the frequency position of downlink synchronization signal

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese patent application CN202510079346.3, filed on January 17, 2025, entitled “Method for Determining Frequency Position of Downlink Synchronization Signal”, and incorporates the entire contents of that patent application by reference. Technical Field

[0003] This disclosure relates to the field of communications, and more specifically, to a method for determining the frequency position of a downlink synchronization signal. Background Technology

[0004] In passive Internet of Things (A-IoT) communication systems, the Reader-to-Device (R2D) link, i.e., the downlink, uses on-off keying (OOK) modulation waveforms based on Orthogonal Frequency Division Multiplexing (OFDM) to transmit downlink signals. Devices need to obtain the downlink synchronization frequency position through downlink synchronization to achieve frequency / time synchronization. Since most of the transmission requirements of A-IoT systems are concentrated in the uplink, and different device types may support different downlink receiving bandwidths and frequency scanning capabilities—for example, device 1 lacks energy storage devices and requires a charging signal to provide power; device 2b has independent energy storage devices and supports frequency division multiplexing transmission mode—a downlink synchronization signal / channel needs to be implemented to meet the requirements of energy saving, high efficiency, and flexible resource allocation for downlink synchronization. Summary of the Invention

[0005] This disclosure provides a method for determining the frequency location of a downlink synchronization signal, which at least solves the problems of low downlink synchronization efficiency, poor energy saving effect, and inflexible resource allocation in related technologies.

[0006] According to one embodiment of this disclosure, a method for determining the frequency position of a downlink synchronization signal is provided, comprising: determining the frequency position of a downlink synchronization signal based on a first frequency position and a frequency offset; and transmitting a downlink synchronization signal based on the frequency position of the downlink synchronization signal.

[0007] According to another embodiment of this disclosure, a terminal is provided, the terminal including a receiver, a transmitter, and a processor, the terminal being configured to perform the steps of any of the above method embodiments via at least one of the receiver, the transmitter, and the processor.

[0008] According to yet another embodiment of this disclosure, a computer-readable storage medium is also provided, wherein a computer program is stored therein, wherein the computer program is configured to perform the steps in any of the above method embodiments when it is run.

[0009] According to yet another embodiment of this disclosure, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0010] According to yet another embodiment of this disclosure, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps in any of the above method embodiments. Attached Figure Description

[0011] Figure 1 is a flowchart of a method for determining the frequency position of a downlink synchronization signal according to an embodiment of the present disclosure;

[0012] Figure 2 is a structural block diagram of a terminal according to an embodiment of this disclosure;

[0013] Figure 3 is a schematic diagram of the device bandwidth according to an embodiment of this disclosure. Detailed Implementation

[0014] The embodiments of this disclosure will be described in detail below with reference to the accompanying drawings and examples.

[0015] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of the embodiments of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0016] In related technologies, the transmission and reception of wireless signals are inseparable from channels. Definitions related to channel arrangement include:

[0017] The global frequency raster defines the set of RF reference frequencies F. REF This is used to define all frequency resources from 0 to 100 GHz, with each frequency corresponding to a frequency point number N. REF The granularity of the global frequency grid is ΔF. Global Among them, F REF Used in signaling to identify the location of newly arrived RF, synchronization blocks, and other elements.

[0018] A channel raster defines a subset of RF reference frequencies used to identify the location of RF channels in the uplink and downlink within an operating frequency band. Within a subset of RF reference frequencies, the signal raster has a granularity ΔF. Raster Its value is generally equal to or greater than ΔF. Global .

[0019] The synchronization raster defines the frequency position of the synchronization signal, and the search range is limited by the Global Synchronization Channel Number (GSCN).

[0020] In related technologies, the downlink frequency range in the 900MHz operating frequency band (n8) is 925–960MHz, and the channel grid granularity is 100kHz. For synchronization signal bandwidths greater than 3MHz, 29 sets of synchronization grids distributed in this downlink frequency band are obtained according to existing calculation formulas in the field. Each set of synchronization grids has three candidate positions, corresponding to the synchronization signal frequency positions for M=1, 3, and 5 under the same N value. The interval between the three candidate positions is 100kHz, and the frequency domain interval between adjacent synchronization grids is 1.2MHz.

[0021] In related technologies, for a synchronization signal bandwidth of 3MHz, 59 sets of synchronization grids distributed in the downlink frequency band are obtained according to existing calculation formulas in the field. Each set of synchronization grids has three candidate positions, with a 100kHz interval between the three candidate positions and a frequency domain interval of 0.6MHz between adjacent synchronization grids.

[0022] In related technologies, on the device side, the device channel bandwidth supports a single radio frequency carrier in either uplink or downlink. On the base station side, different device channel bandwidths reside within the same spectrum used for transmission and reception. A device can be configured with one or more bandwidths or carriers, each with its own device channel bandwidth. The device does not need to know the base station channel bandwidth or the bandwidth allocated by the base station to other devices. The location of the device channel bandwidth corresponding to each device carrier is relatively flexible but must be entirely within the base station's channel bandwidth.

[0023] This disclosure provides a method for determining the frequency position of a downlink synchronization signal. Figure 1 is a flowchart of the method for determining the frequency position of a downlink synchronization signal according to this disclosure. As shown in Figure 1, the process includes the following steps:

[0024] Step S102: Determine the downlink synchronization signal frequency position based on the first frequency position and frequency offset.

[0025] Step S104: Transmit downlink synchronization signal according to downlink synchronization signal frequency position.

[0026] In one exemplary embodiment, determining the downlink synchronization signal frequency position based on a first frequency position and a frequency offset includes:

[0027] Based on the first frequency position, the first frequency offset, and the second frequency offset, a summation operation is performed to determine the downlink synchronization signal frequency position, expressed by the formula: F=N·ΔF0+M·ΔF1+ΔF2

[0028] Wherein, the frequency offset includes the first frequency offset and / or the second frequency offset, F represents the downlink synchronization signal frequency position, N·ΔF0 represents the first frequency position, M·ΔF1 represents the first frequency offset, ΔF2 represents the second frequency offset, N is a positive integer, and M is an integer value in the range of 0 to 20;

[0029] The value of ΔF0 is determined based on at least one of the following: the frequency range of the operating frequency band supported by the device [F min ,F max ]; Granularity ΔF of the channel grid within the operating frequency band Raster Downlink sub-carrier spacing (SCS), RF filter bandwidth F RF_fir Baseband filter bandwidth F BB_fir Downlink synchronization signal bandwidth F sync Downlink common signal bandwidth F comm Downlink transmission bandwidth F trans Downlink system bandwidth F sys Sampling frequency F smpling Maximum number of downlink connected users N dev Resource reuse mode and the center frequency F of the downlink channel central At least one of them is related;

[0030] The value of ΔF1 is determined based on at least one of the following: device type; downlink synchronization signal bandwidth F. sync Downlink subcarrier spacing (SCS); downlink channel center frequency (F) central The frequency points of the downlink channel in the 6G system;

[0031] The value of ΔF2 is determined based on at least one of the following: the frequency range of the operating frequency band supported by the device [F min ,F max ]; Values ​​of ΔF0; Values ​​of ΔF1; Values ​​of N; Values ​​of M.

[0032] In one exemplary embodiment, N takes the value of to Integers between;

[0033] The interval between adjacent values ​​of N is at least one of the following:

[0034] Here, func(·) represents at least one of the following operations on ·: rounding up, rounding down, rounding to the nearest integer, or retaining the original value.

[0035] In an exemplary embodiment, the value of N includes a start term, a stop term, and an interval, wherein the start term is an N value that is not less than the minimum value of the Global Synchronization Channel Number (GSCN) and not greater than the value of the stop term, and the stop term is an N value that is not less than the N value corresponding to the start term and not greater than the N value corresponding to the maximum value of the GSCN.

[0036] In one exemplary embodiment, in response to the frequency range of the operating frequency band supported by the device being 0–3 GHz, and the downlink synchronization signal bandwidth F sync The value of ΔF0 is less than 3MHz, ΔF2 is 1200kHz, ΔF1 is 0, the global synchronization channel number GSCN is 3N+(M-3) / 2, and ΔF1 is 50kHz; or, in response to the frequency range of the operating frequency band supported by the device being 0~1GHz, and the downlink synchronization signal bandwidth F sync The value of ΔF0 is less than 3MHz, the value of ΔF2 is 600kHz, the value of ΔF2 is 300kHz, the value of the global synchronization channel number GSCN is 266638+3N+(M-3) / 2, and the value of ΔF1 is 50kHz.

[0037] In one exemplary embodiment, M is an even number in the range of 0 to 20, or an odd number in the range of 7 to 20.

[0038] In one exemplary embodiment, ΔF0 takes at least one value from a first set of values, wherein the values ​​in the first set are not less than 180 kHz and not greater than 10 MHz, or the first set of values ​​is:

[0039] {180,360,540,720,900,1080,1260,1440,1620,1800,1980,2160,2340,2520,2700,2880,3060,3240,3420,3600,3780,3960,4140,4320,4500,4680,4860,5040, 5220,5400,5580,5760,5940,6120,6300,6480,6660,6840,7020,7200,7380,7560,7740,7920,8100,8280,8460,8640,8820,9000,9180,9360,9540,9720,9900}.

[0040] In one exemplary embodiment, in response to the downlink synchronization signal bandwidth F sync Not less than 3MHz, the value of ΔF0 is not less than the downlink synchronization signal bandwidth F sync One-third, wherein the global synchronization channel number GSCN is X+N, and the value of X is not less than 32000; or, in response to the downlink synchronization signal bandwidth F sync For frequencies less than 3MHz, the value of ΔF0 is not less than the downlink synchronization signal bandwidth F. sync One-third and not greater than the downlink system bandwidth F sys Wherein, the Global Synchronization Channel Number (GSCN) is X + 3N + (M - 3) / 2, and the value of X is not less than 32000; or, in response to the downlink synchronization signal bandwidth F sync For frequencies less than 3MHz, ΔF0 should be no greater than 900kHz and no less than 180kHz, and ΔF2 should be no greater than the downlink synchronization signal bandwidth F. sync Or downlink transmission bandwidth F trans Or downlink common signal bandwidth F comm The maximum value in the range, where the global synchronization channel number GSCN is X+3N+(M-3) / 2, and the value of X is not less than 32000.

[0041] In one exemplary embodiment, the value of ΔF2 is 50kHz, 7.5kHz, 180kHz, or the downlink synchronization signal bandwidth F. sync Or downlink transmission bandwidth F trans Or downlink common signal bandwidth F comm A multiple of at least one of them.

[0042] In one exemplary embodiment, the downlink synchronization signal frequency is 5G. A subset of NR synchronization signal frequency positions, comprising at least one of the following: one or more pairs of synchronization signal frequency positions symmetrical about the center frequency of the downlink physical channel within the frequency range of the operating frequency band supported by the device; one or more synchronization signal frequency positions within the frequency range of the operating frequency band supported by the device that are lower than or higher than the center frequency of the downlink physical channel, or located in the lower sideband or upper sideband of the downlink physical channel; synchronization signal frequency positions within the frequency range of the operating frequency band supported by the device that are located at the center frequency of the downlink physical channel; synchronization signal frequency positions within the frequency range of the operating frequency band supported by the device that are lower than the frequency value at the center point of the frequency range; synchronization signal frequency positions within the frequency range of the operating frequency band supported by the device that are higher than the frequency value at the center point of the frequency range, serving as A-IoT downlink synchronization signal frequency positions; synchronization signal frequency positions within the frequency range of the operating frequency band supported by the device that are located at the frequency value at the center point of the frequency range; synchronization signal frequency positions within the frequency range of the operating frequency band supported by the device that have the smallest frequency difference and are not greater than the frequency value at the center point of the frequency range; synchronization signal frequency positions within the frequency range of the operating frequency band supported by the device that have the smallest frequency difference and are not less than the frequency value at the center point of the frequency range.

[0043] In an exemplary embodiment, the Global Synchronization Channel Number (GSCN) applied to the downlink synchronization signal frequency location includes a start term, an end term, and a predefined interval value. The start term is a value not less than the minimum GSCN and not greater than the end term. The end term is a value not less than the start term and not greater than the maximum GSCN. The predefined interval value is the maximum GSCN value defined by 1 to 5G NR, or the predefined interval value plus the maximum number of synchronization signal frequency locations supported by the device, or the total number of synchronization signal frequency locations defined by 5G NR within the frequency range of the operating frequency band supported by the device, or the downlink synchronization signal bandwidth F. sync , or the number of values ​​that M can take.

[0044] In one exemplary embodiment, the downlink synchronization signal frequency position is a frequency position determined based on the 5G NR synchronization signal frequency position, the start synchronization signal frequency position, the end synchronization signal frequency position, and the frequency offset value.

[0045] In one exemplary embodiment, the downlink synchronization signal frequency position is a first predefined frequency position within the operating frequency band supported by the device.

[0046] In one exemplary embodiment, the downlink synchronization signal frequency position is a second predefined frequency position, which includes at least one of the following: a 5G NR synchronization signal frequency position; a synchronization signal frequency position specified by the 6G system and the corresponding Global Synchronization Channel Number (GSCN) value.

[0047] In one exemplary embodiment, the second predefined frequency position further includes: in response to the fact that the frequency range of the operating frequency band supported by the device is no greater than 3 GHz, the second predefined frequency position is N·ΔF0+M·ΔF1+ΔF2, and the value of the global synchronization channel number GSCN is X+3N+(M-3) / 2, wherein,

[0048] N is a value that is not less than 0 and not greater than 3000, and the interval between adjacent N values ​​is equal to ΔF0 and / or 2. n And / or related to the subcarrier spacing SCS, where the value of SCS is 2. n *15kHz, where n is an integer not less than 2 and not greater than 10; M takes the value 2*m+1, where m is an integer not less than 0 or 2 n ΔF0 is an integer multiple or common multiple of at least one of 1.44MHz, 17.28MHz, or 180kHz, or 2. n The value of ΔF1 is 50kHz, 15kHz or 2 n An integer multiple or common multiple of at least one of the values; ΔF2 takes the values ​​of SCS, 50kHz, 15kHz or 2 n An integer multiple or common multiple of at least one of the values; X is an integer value not less than 31640 or 41640.

[0049] In one exemplary embodiment, the second predefined frequency position further includes: in response to the fact that the frequency range of the operating frequency band supported by the device is not less than 3 GHz, the second predefined frequency position is F. start +N·ΔF0, where the Global Synchronization Channel Number (GSCN) is X+N, and N is a value not less than 0 and not greater than 3000, and the interval between adjacent N values ​​is equal to ΔF0 and / or 2. n And / or related to the subcarrier spacing SCS, where the value of SCS is 2. n *15kHz, where n is an integer not less than 2 and not greater than 10; F start For values ​​not less than 3 GHz, ΔF0 is an integer multiple or common multiple of 3840 kHz, 180 kHz, and 60 kHz, or 2. kX is an integer multiple or common multiple of at least one of the following values: 1.44MHz, 17.28MHz, 15kHz, 60*mkHz, 120kHz, or 180kHz, k is not less than 16, m is a positive number not greater than 10, X is not less than the maximum value of the GSCN applied to the device, or not less than 41640, or X is an integer value not less than 39000 or 49000.

[0050] In an exemplary embodiment, in response to the coexistence of 6G and 5G NR systems, within the frequency range of the operating frequency band supported by the device, the downlink synchronization signal frequency location includes at least one of the following:

[0051] Frequency locations that overlap with or coincide with the frequency location of the 5G / 6G network synchronization signal; frequency locations within the Physical Resource Block (PRB) range where the 5G / 6G network synchronization signal is located; frequency locations within the transmission bandwidth or channel bandwidth range where the 5G / 6G network synchronization signal is located.

[0052] In an exemplary embodiment, the method determines whether to access the cell or whether the current frequency position is an overlapping frequency position of A-IoT and 5G synchronization signals, or an overlapping frequency position of 5G and 6G synchronization signals, or a synchronization signal frequency position in the case of 6G standalone deployment, by detecting the first information carried by the received synchronization signal.

[0053] The first information includes at least one of the following: information carried on a 5G / 6G synchronization sequence or a Physical Broadcast Channel (PBCH); or information carried on the device's synchronization signal.

[0054] In one exemplary embodiment, the frequency position of the overlapping A-IoT and 5G synchronization signals, or the frequency position of the overlapping 5G and 6G synchronization signals, or the frequency position of the synchronization signal in the case of 6G standalone deployment, is indicated by sending a predefined synchronization signal on a predefined resource.

[0055] The above steps provide a method for determining the frequency position of a downlink synchronization signal. The downlink synchronization signal frequency position is determined based on a first frequency position and a frequency offset; downlink synchronization signal transmission is then performed based on the downlink synchronization signal frequency position. This embodiment solves the problems of low downlink synchronization efficiency, poor energy saving, and inflexible resource allocation in related technologies, achieving improved downlink synchronization efficiency and energy saving, and enabling flexible allocation of downlink synchronization resources.

[0056] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solutions of the embodiments of this disclosure, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the embodiments of this disclosure.

[0057] This embodiment also provides a downlink synchronization signal frequency position determination device, which is used to implement the above embodiments and preferred embodiments, and will not be repeated as already described. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0058] In this embodiment of the disclosure, the downlink synchronization signal frequency position determination device may further include different modules. The naming and functional division of the modules may also be selected in different ways according to the actual situation, as long as the steps of the downlink synchronization signal frequency position determination method can be implemented. No specific restrictions are imposed here.

[0059] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0060] This disclosure also provides a terminal for implementing a downlink synchronization signal frequency location determination method. FIG2 is a structural block diagram of the terminal according to an embodiment of this disclosure. As shown in FIG2, the terminal 200 includes a receiver 201, a transmitter 202 and a processor 203. The terminal 200 is used to execute the steps of the downlink synchronization signal frequency location determination method by at least one of the receiver 201, the transmitter 202 and the processor 203.

[0061] This disclosure also provides a computer-readable storage medium storing a computer program configured to perform the steps in any of the above method embodiments when executed.

[0062] In one exemplary embodiment, the aforementioned computer-readable storage medium may include, but is not limited to, various media capable of storing computer programs, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard disk, magnetic disk, or optical disk.

[0063] This disclosure also provides an electronic device including a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0064] In one exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0065] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements the steps in any of the above method embodiments.

[0066] In one exemplary embodiment, the computer program product described above includes a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the methods described in various embodiments of this application.

[0067] Specific examples in this embodiment can be found in the examples described in the above embodiments and exemplary implementations, and will not be repeated here.

[0068] Obviously, those skilled in the art should understand that the modules or steps of the embodiments of this disclosure described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the embodiments of this disclosure are not limited to any particular combination of hardware and software.

[0069] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, the following description is provided in conjunction with different embodiments.

[0070] Example 1

[0071] In this embodiment of the disclosure, the base station may include at least one of a reader, an intermediate user equipment node, a temporary user equipment node, an eNodeB, a gNodeB, and an hNodeB. The device may include at least one of an A-IoT device, a user equipment, a 5G user equipment, a 6G user equipment, a sensing device, and an artificial intelligence device.

[0072] Figure 3 is a schematic diagram of the device bandwidth according to an embodiment of the present disclosure. As shown in Figure 3, it includes device transmission bandwidth, channel bandwidth, system bandwidth, guard band, etc.

[0073] In this embodiment of the disclosure, the downlink synchronization signal frequency position is determined by summing the first frequency position, the first frequency offset, and the second frequency offset, as expressed by the formula: F=N·ΔF0+M·ΔF1+ΔF2

[0074] The frequency offset includes a first frequency offset and / or a second frequency offset, where F represents the downlink synchronization signal frequency position, N·ΔF0 represents the first frequency position, M·ΔF1 represents the first frequency offset, and ΔF2 represents the second frequency offset. N is a positive integer, and M is an integer value in the range of 0 to 20.

[0075] The value of ΔF0 is determined based on at least one of the following: the frequency range of the operating frequency band supported by the device [F min ,F max ]; Granularity ΔF of the channel grid within the operating frequency band Raster Downlink subcarrier spacing (SCS), RF filter bandwidth (F) RF_fir Baseband filter bandwidth F BB_fir Downlink synchronization signal bandwidth F sync Downlink common signal bandwidth F comm Downlink transmission bandwidth F trans Downlink system bandwidth F sys Sampling frequency F smpling Maximum number of downlink connected users N dev Resource reuse mode and the center frequency F of the downlink channel central At least one of them is related;

[0076] The value of ΔF1 is determined based on at least one of the following: device type; downlink synchronization signal bandwidth F. sync Downlink subcarrier spacing (SCS); downlink channel center frequency (F) central The frequency points of the downlink channel in the 6G system;

[0077] The value of ΔF2 is determined based on at least one of the following: the frequency range of the operating frequency band supported by the device [F min ,F max ]; Values ​​of ΔF0; Values ​​of ΔF1; Values ​​of N; Values ​​of M.

[0078] In this embodiment of the disclosure, N takes the value of to Integers between;

[0079] The interval between adjacent values ​​of N is at least one of the following:

[0080] Here, func(·) represents at least one of the following operations on ·: rounding up, rounding down, rounding to the nearest integer, or retaining the original value.

[0081] In one embodiment, within the frequency range corresponding to a given operating frequency band, the value of N includes a start term, a stop term, and the interval, wherein the start term is an N value not less than the minimum GSCN value and an N value not greater than the stop term, and the stop term is an N value not less than the start term and an N value not greater than the maximum GSCN value.

[0082] In this embodiment of the disclosure, within the n8 frequency band, N is a value between 770 and 799, and the system bandwidth F sys =10MHz, synchronization signal bandwidth F sync =2.16MHz, for energy saving considerations, the interval (step) between adjacent N values ​​is . If M = 3, then the formula for calculating the frequency of the A-IoT synchronization signal is N*1200kHz + M*50kHz, and the corresponding formula for calculating the GSCN value is GSCN = 26638 + 3N + (M-3) / 2.

[0083] In this embodiment of the disclosure, for the frequency range of 0 to 3 GHz and F sync For frequencies >3MHz, ΔF0 is 1200kHz, ΔF2 is 0, and GSCN = 3N + (M - 3) / 2; or, for the frequency range of 0 to 1GHz and F sync = 3MHz, ΔF0 is 600kHz, ΔF2 is 300kHz, GSCN = 26638 + 3N + (M - 3) / 2; or, for the frequency range of 0 to 3GHz and F sync <3MHz, ΔF0 is 1200kHz, ΔF2 is 0, GSCN=3N+(M-3) / 2; or, for the frequency range of 0~1GHz and F sync <3MHz, ΔF0 is 600kHz, ΔF2 is 300kHz, GSCN=26638+3N+(M-3) / 2. ΔF1=50kHz.

[0084] In this embodiment of the disclosure, the synchronization signal bandwidth F syncSince 3.6MHz > 3MHz, the corresponding downlink frequency range for the operating frequency band is 925~960MHz, i.e., F min =925MHz, F max =960MHz, N is a value in the range of 770 to 799 with intervals of . M takes the value of 1, 3 or 5, with the default being 3; ΔF0 is 1200kHz, ΔF1 is 50kHz, and ΔF2 is 0; that is, the formula for calculating the frequency domain position of the synchronization signal is N·1200+M·50kHz, and N takes the value in intervals of 9 within the range of 770 to 799.

[0085] In this embodiment of the disclosure, the synchronization signal bandwidth F sync The operating frequency band is 540kHz < 3MHz, and the corresponding downlink frequency range is 925~960MHz, i.e., F min =925MHz, F max =960MHz, N is a value in the range of 770 to 799 with intervals of . M takes the value of 1, 3 or 5, with the default being 3; ΔF0 is 600kHz, ΔF1 is 50kHz, and ΔF2 is 300kHz; that is, the formula for calculating the frequency domain position of the synchronization signal is N·600+M·50+300kHz, and N takes the value in intervals of 64 within the range of 1540 to 1599.

[0086] In this embodiment of the disclosure, M is an even number in the range of 0 to 20, or an odd number in the range of 7 to 20.

[0087] In this embodiment of the disclosure, considering the frequency sweeping efficiency of the device, the device scans the synchronization signal frequency position from bottom to top within the operating frequency band. Therefore, the 5G NR synchronization block frequency domain position corresponding to M=1 is selected to help the device obtain the synchronization signal frequency position as soon as possible.

[0088] In this embodiment of the disclosure, considering the coexistence of A-IoT and 5G NR, an additional value of M is added within the operating frequency band to avoid interference and resource collisions, including M = 6 or 7. In one embodiment, for the n8 frequency band, the formula for calculating the frequency position of the A-IoT synchronization signal is N*1200kHz + M*50kHz, where M = 7, and the formula for calculating the GSCN corresponding to each frequency point is GSCN = X + N, where X is a value not less than 31640 and not greater than 50000.

[0089] In this embodiment of the disclosure, ΔF0 takes at least one value from a first set of values, wherein the values ​​in the first set are not less than 180kHz and not greater than 10MHz, or the first set of values ​​is:

[0090] {180,360,540,720,900,1080,1260,1440,1620,1800,1980,2160,2340,2520,2700,2880,3060,3240,3420,3600,3780,3960,4140,4320,4500,4680,4860,5040, 5220,5400,5580,5760,5940,6120,6300,6480,6660,6840,7020,7200,7380,7560,7740,7920,8100,8280,8460,8640,8820,9000,9180,9360,9540,9720,9900}.

[0091] In one embodiment, ΔF1 = 50 kHz, N is to The integers between 32000 and 3N; where GSCN = X + 3N + (M - 3) / 2, and X is not less than 32000 and not greater than 90000. The design aims to ensure that the positions of the A-IoT synchronization grid and the 5G NR synchronization grid do not overlap.

[0092] In one embodiment, ΔF0 = 1980 kHz, N includes values ​​between 467 and 485, M = 0, and ΔF2 = 0.

[0093] In one embodiment, ΔF0 = 180 kHz, N includes values ​​between 5138 and 5334, M = 0, and ΔF2 = 300 kHz.

[0094] In this embodiment of the disclosure, in response to the downlink synchronization signal bandwidth F sync Not less than 3MHz, the value of ΔF0 is not less than the downlink synchronization signal bandwidth F sync One-third of the total, of which the global synchronization channel number GSCN is X+N, and the value of X is not less than 32000; the design purpose is to ensure that the positions of the A-IoT synchronization grid and the 5G NR synchronization grid do not overlap.

[0095] Alternatively, in response to the downlink synchronization signal bandwidth F sync For frequencies less than 3MHz, the value of ΔF0 is not less than the downlink synchronization signal bandwidth F. sync One-third and not greater than the downlink system bandwidth F sys The global synchronization channel number GSCN is X+3N+(M-3) / 2, and the value of X is not less than 32000. The design aims to ensure that the positions of the A-IoT synchronization grid and the 5G NR synchronization grid do not overlap.

[0096] Alternatively, in response to the downlink synchronization signal bandwidth F syncFor frequencies less than 3MHz, ΔF0 should be no greater than 900kHz and no less than 180kHz, and ΔF2 should be no greater than the downlink synchronization signal bandwidth F. sync Or downlink transmission bandwidth F trans Or downlink common signal bandwidth F comm The maximum value in the range is defined as follows: the global synchronization channel number (GSCN) is X + 3N + (M - 3) / 2, where X is not less than 32000. The design aims to ensure that the A-IoT synchronization grid and the 5G NR synchronization grid do not overlap.

[0097] In one embodiment, the formula for calculating the synchronization signal frequency position is N·300 + M·50 + 600kHz, where N is a value of 4*n, and n is an integer not less than 1. For example, when N = 3088, the A-IoT synchronization signal frequency position is 927.05MHz. The closest 5G NR synchronization signal frequencies to this position are 926.65MHz and 927.65MHz, ensuring they do not overlap.

[0098] In one embodiment, the formula for calculating the frequency position of the synchronization signal is N·300+M·50+1800kHz, where N is 4*n, and n is an integer not less than 0.

[0099] In one embodiment, the formula for calculating the frequency position of the synchronization signal is N·600+M·50+1800kHz, where N is 2*n, and n is an integer not less than 0.

[0100] In one embodiment, the formula for calculating the frequency position of the synchronization signal is N·600+1800kHz, where N is 2*n, and n is an integer not less than 0.

[0101] In one embodiment, the formula for calculating the frequency position of the synchronization signal is N·300+1800kHz, where N is 4*n, and n is an integer not less than 0.

[0102] In one embodiment, the formula for calculating the frequency position of the synchronization signal is N·300+1800kHz, where N is 4*n, and n is an integer not less than 0.

[0103] In this embodiment of the disclosure, when F sync When the frequency is greater than 3MHz, ΔF0 is not greater than 18000kHz and not less than 12000kHz; when F syncWhen the frequency is not greater than 3MHz and not less than 1.2MHz, ΔF0 is not greater than 12000kHz and not less than 600kHz; otherwise, ΔF0 is not greater than 600kHz and not less than 180kHz. Where GSCN = X + 3N + (M - 3) / 2, and X is not less than 32000.

[0104] In one embodiment, the formula for calculating the frequency position of the synchronization signal is N·1200+600kHz, where GSCN=X+3N+(M-3) / 2, and X is not less than 32000.

[0105] In this embodiment, the value of ΔF2 is 50kHz, 7.5kHz, 180kHz, or the downlink synchronization signal bandwidth F. sync Or downlink transmission bandwidth F trans Or downlink common signal bandwidth F comm A multiple of at least one of them.

[0106] In this embodiment of the disclosure, for the frequency range of 0 to 3 GHz and F sync For frequencies >3MHz, ΔF0 is 1200kHz, ΔF2 is 0, and GSCN = 3N + (M - 3) / 2; or, for the frequency range of 0 to 1GHz and F sync = 3MHz, ΔF0 is 600kHz, ΔF2 is 300kHz, GSCN = 26638 + 3N + (M - 3) / 2; or, for the frequency range of 0 to 3GHz and F sync <3MHz, ΔF0 is 1200kHz, ΔF2 is 0, GSCN=3N+(M-3) / 2; or, for the frequency range of 0~1GHz and F sync <3MHz, ΔF0 is 600kHz, ΔF2 is 300kHz, GSCN = 26638 + 3N + (M - 3) / 2. ΔF1 = 50kHz. ΔF2 = 180kHz.

[0107] In this embodiment of the disclosure, the A-IoT downlink synchronization signal frequency location is a subset of the 5G NR synchronization signal frequency location. The subset of the 5G NR synchronization signal frequency location includes at least one of the following:

[0108] Within the frequency range corresponding to the operating frequency band, one or more pairs of synchronization signal frequency positions that are symmetrical about the center frequency of the downlink physical channel are taken as the downlink synchronization signal frequency positions of A-IoT.

[0109] Within the frequency range corresponding to the operating frequency band, one or more synchronization signal frequency positions that are lower than or higher than the center frequency of the downlink physical channel, or located in the lower sideband or upper sideband of the downlink physical channel, are designated as A-IoT downlink synchronization signal frequency positions. In one embodiment, the A-IoT synchronization signal frequency position overlaps with the 5G NR synchronization signal frequency position, and the A-IoT synchronization signal frequency position is the 5G NR synchronization signal frequency position that is closest to the center frequency of the downlink physical channel.

[0110] Within the frequency range corresponding to the operating frequency band, the frequency position of the synchronization signal located at the center frequency of the downlink physical channel is taken as the frequency position of the A-IoT downlink synchronization signal.

[0111] Within the frequency range corresponding to the working frequency band, the frequency position of the synchronization signal with a frequency value lower than the center point of the frequency range is taken as the frequency position of the A-IoT downlink synchronization signal.

[0112] Within the frequency range corresponding to the working frequency band, the frequency position of the synchronization signal with a frequency value greater than the center point of the frequency range is taken as the frequency position of the A-IoT downlink synchronization signal.

[0113] Within the frequency range corresponding to the working frequency band, the frequency position of the synchronization signal located at the center point of the frequency range is taken as the frequency position of the A-IoT downlink synchronization signal.

[0114] Within the frequency range corresponding to the working frequency band, the frequency position of the synchronization signal that is closest to and not greater than the frequency value of the center point of the frequency range is taken as the A-IoT downlink synchronization signal frequency position.

[0115] Within the frequency range corresponding to the operating frequency band, the frequency position of the synchronization signal that is closest to and not less than the frequency value of the center point of the frequency range is taken as the downlink synchronization signal frequency position of A-IoT.

[0116] In this embodiment, the downlink synchronization signal frequency position is a second predefined frequency position, which includes at least one of the following: a 5G NR synchronization signal frequency position; a synchronization signal frequency position specified by the 6G system and the corresponding Global Synchronization Channel Number (GSCN) value. Specific correspondences can be found in existing parameter relationship tables in the art, and will not be elaborated upon here.

[0117] In this embodiment, the Global Synchronization Channel Number (GSCN) applied to the downlink synchronization signal frequency location includes a start term, a stop term, and a predefined interval value. The start term is a value not less than the minimum GSCN and not greater than the stop term. The stop term is a value not less than the start term and not greater than the maximum GSCN. The predefined interval value is the maximum GSCN value defined by 1 to 5G NR, or the predefined interval value plus the maximum number of synchronization signal frequency locations supported by the device, or the total number of synchronization signal frequency locations defined by 5G NR within the frequency range of the operating frequency band supported by the device, or the downlink synchronization signal bandwidth F. sync , or the number of values ​​that M can take.

[0118] In one embodiment, within the frequency range of 925–960 MHz, the GSCN value of the 5G NR synchronization signal ranges from 770 to 799. A-IoT supports 10 synchronization signal frequency positions. The GSCN value of the A-IoT synchronization signal is applied within the range of 770–799. The values ​​are intervals, and the corresponding synchronization signal frequency positions are the frequency positions of the A-IoT synchronization signal.

[0119] In one embodiment, for the frequency range of 925 to 960 MHz, the GSCN value range of the 5G NR synchronization signal is 770 to 799, where M has three values: 1, 3, and 5. Therefore, the GSCN value range applied to the A-IoT synchronization signal is the value with 770 or 771 as the first term and 3 as the interval within the range of 770 to 799.

[0120] In one embodiment, the frequency position of the A-IoT synchronization signal does not overlap with the frequency position of the 5G NR synchronization signal.

[0121] In this embodiment of the disclosure, the frequency position of the A-IoT downlink synchronization signal is determined based on the frequency position of the 5G NR synchronization signal, a starting synchronization signal frequency position, a ending synchronization signal frequency position, and a frequency offset value.

[0122] In one embodiment, the starting synchronization signal frequency position and the ending synchronization signal frequency position are the 5G NR synchronization signal frequency positions within the frequency range supported by the A-IoT device; wherein, the frequency offset value is greater than 15kHz and not greater than F sync or F trans or F comm At least one of the values.

[0123] In one embodiment, the value obtained by adding or subtracting the frequency offset value from the 5G NR synchronization signal frequency position located within the range of the start synchronization signal frequency position and the end synchronization signal frequency position is the A-IoT downlink synchronization signal frequency position.

[0124] In one embodiment, the GSCN value corresponding to the frequency position of the A-IoT synchronization signal is the same as the GSCN value corresponding to the frequency position of its associated 5G NR synchronization signal; or the frequency position of the A-IoT synchronization signal is the value obtained by adding the GSCN value corresponding to the frequency position of its associated 5G NR synchronization signal to X. Here, X is a positive integer not less than 31640 and not greater than 90000.

[0125] In this embodiment of the disclosure, the frequency position of the A-IoT downlink synchronization signal is a predefined frequency position within the operating frequency band. The predefined frequency position includes at least one of the following:

[0126] In one embodiment, the predefined frequency position is located within the interval from the minimum value of the frequency range corresponding to the operating frequency band supported by the A-IoT device to the frequency position of the first 5G NR synchronization signal in the operating frequency band supported by the A-IoT device, and is a non-5G NR synchronization signal frequency position. For example, in the frequency range of 925MHz to 960MHz, the frequency position of the A-IoT synchronization signal is a value within the range of 925MHz to 925.25MHz that is divisible by 50kHz and / or n*15kHz and / or 180kHz, or a value within the range of 925MHz to 925.55MHz that is divisible by 50kHz and / or n*15kHz and / or 180kHz. Here, n is an integer between 1 and 20.

[0127] In one embodiment, the predefined frequency position is located within the range from the last 5G NR synchronization signal frequency position in the operating frequency band supported by the A-IoT device to the maximum value of the corresponding frequency range of the operating frequency band supported by the A-IoT device. For example, in the frequency range of 925MHz to 960MHz, the frequency position of the A-IoT synchronization signal is a value within the range of 958.9MHz to 960MHz that is divisible by 50kHz and / or n*15kHz and / or 180kHz, or a value within the range of 959.95MHz to 960MHz that is divisible by 50kHz and / or n*15kHz and / or 180kHz. Here, n is an integer between 1 and 20.

[0128] In one embodiment, the predefined frequency position is located at the center frequency of the operating frequency band supported by the A-IoT device. For example, in the frequency range of 925MHz to 960MHz, the frequency position of the A-IoT synchronization signal is 942.5MHz.

[0129] In one embodiment, if the center frequency of the operating frequency band supported by the A-IoT device overlaps with the frequency of the 5G NR synchronization signal, then a position spaced S from that frequency position is selected as the synchronization signal frequency position for the A-IoT. Here, S is a number divisible by 50kHz, or a number divisible by 180kHz, or not less than F. sync or F trans or F comm At least one of the values.

[0130] In one embodiment, the predefined frequency position is located at the center frequency position of the first physical downlink channel or the first physical downlink transmission channel of the operating frequency band supported by the A-IoT device, or a segment of downlink frequency domain transmission resources used for frequency division multiplexing.

[0131] In one embodiment, the predefined frequency position is located at the upper sideband frequency position of the operating frequency band supported by the A-IoT device and is a non-5G NR synchronization signal frequency position. For example, in the frequency range of 925MHz to 960MHz, the frequency position of the A-IoT synchronization signal is in the range of 925MHz to 942.5MHz.

[0132] In one embodiment, the predefined frequency position is located at the lower sideband frequency position of the operating frequency band supported by the A-IoT device and is a non-5G NR synchronization signal frequency position. For example, in the frequency range of 925MHz to 960MHz, the frequency position of the A-IoT synchronization signal is in the range of 942.5MHz to 960MHz.

[0133] In one embodiment, the GSCN value is not less than 41640 and not greater than 90000. The GSCN values ​​at the predefined frequency positions increase by 1 in ascending order of frequency value.

[0134] In one embodiment, the frequency position of the A-IoT downlink synchronization signal is determined according to the factory settings of the A-IoT device or according to the internal clock frequency of the A-IoT device.

[0135] Example 2

[0136] In this embodiment of the disclosure, for 6G communication systems, the application scenarios are more diversified, and it is necessary to consider coexistence with 4G Long-Term Evolution (LTE) / 5G NR; at the same time, the operating frequency band is higher, and it is necessary to solve the problems of low efficiency and high power consumption of search synchronization signals. Therefore, it is necessary to design an enhanced downlink synchronization signal frequency domain position to adapt to the needs of 6G application scenarios.

[0137] In this embodiment of the disclosure, the 6G downlink synchronization signal frequency position is a predefined frequency position, wherein the 6G predefined frequency position includes at least one of the following:

[0138] 5G NR synchronization signal frequency location; the parameter relationship example table in this field gives the synchronization signal frequency location and the corresponding GSCN value;

[0139] In one embodiment, when the frequency range is no greater than 3GHz, the downlink synchronization signal frequency position of the 6G operating frequency band is defined as N·ΔF0+M·ΔF1+ΔF2, GSCN=X+3N+(M-3) / 2.

[0140] Where N is a value not less than 0 and not greater than 3000, and the interval (step) between adjacent N values ​​is related to ΔF0 and / or 2. n And / or related to the subcarrier spacing SCS, where the value of SCS is 2. n *15kHz, where n is an integer not less than 2 and not greater than 10. For example, the interval value is SCS / (ΔF0*2). n ).

[0141] Where M takes the value 2*m+1, where m is an integer not less than 0 or 2. n , where n is an integer between 1 and 10.

[0142] Where ΔF0 is an integer multiple or common multiple of at least one of 1.44MHz, 17.28MHz, or 180kHz, or 2 n Where n is an integer not less than 2 and not greater than 10. For example, ΔF0 = 34.56MHz or 69.12MHz.

[0143] Where ΔF1 is 50kHz, 15kHz or 2 n An integer multiple or common multiple of at least one of the values.

[0144] Where ΔF2 is SCS, 50kHz, 15kHz or 2 n An integer multiple or common multiple of at least one of the values.

[0145] Where X is an integer value not less than 31640 or 41640.

[0146] When the frequency range is not less than 3GHz, the downlink synchronization signal frequency position of the 6G operating frequency band is defined as F. start +N·ΔF0,GSCN=X + N.

[0147] Where N is a value not less than 0 and not greater than 3000, and the interval (step) between adjacent N values ​​is related to ΔF0 and / or 2. n And / or related to the subcarrier spacing SCS, where the value of SCS is 2. n*15kHz, where n is an integer not less than 2 and not greater than 10. For example, the interval value is SCS / (ΔF0*2). n ).

[0148] Among them, F start The value is not less than 3GHz, for example, 6000MHz or 24250MHz.

[0149] Where ΔF0 is an integer multiple or common multiple of 3840kHz, 180kHz, and 60kHz, or is 2. k , 1.44MHz, 17.28MHz, 15kHz, 60*m The frequency is an integer multiple or common multiple of at least one of kHz, 120kHz, or 180kHz, where k is not less than 16 and m is a positive number not greater than 10. This design considers the high orders of magnitude supported by the 6GHz band, with an SCS of 15*2. k The frequency position of the synchronization signal must be at least an integer multiple of the SCS and an integer multiple of the bandwidth of a physical resource block corresponding to the minimum SCS (i.e., 180kHz) to ensure that the frequency domain resources of the synchronization signal are aligned with the boundaries of the RB resources.

[0150] Where X is not less than the maximum value of GSCN applied to A-IoT, or not less than 41640. Where X is an integer value not less than 39000 or 49000.

[0151] In one embodiment, F start =34560kHz, F start Not less than 24250MHz and F star The integer multiple of 24261.12MHz means that when the frequency range is 24250 to 100000MHz, the formula for calculating the downlink synchronization signal frequency position is 24261.12MHz + N·34.56MHz. Therefore, the value of N ranges from 0 to 2893, corresponding to GSCN = 41640 + N.

[0152] The subcarrier spacing (SCS) includes a 6 GHz SCS configuration value. For example, SCS = 15 kHz * 2^8 = 3840 kHz.

[0153] Example 3

[0154] In this embodiment, an interference avoidance mechanism based on downlink synchronization is introduced under the condition of coexistence of A-IoT and 5G / 6G networks.

[0155] In this embodiment, since A-IoT downlink transmission uses OOK or Binary Phase-Shift Keying (BPSK) signals based on DFT-s-OFDM, the device receives and processes the downlink signal in the time domain. This results in a high A-IoT downlink operating point (signal-to-noise ratio (SNR) value at the target bit error rate (BLER). In scenarios where A-IoT networks and 5G / 6G networks coexist, if the downlink synchronization frequencies of 5G / 6G and A-IoT overlap, the A-IoT downlink signal will significantly interfere with the downlink transmission of 5G / 6G devices within the same cell. To prevent 5G / 6G user equipment downlink transmission from interference by A-IoT devices, an interference avoidance mechanism needs to be designed.

[0156] In this embodiment of the disclosure, for scenarios where A-IoT and 5G / 6G networks coexist, the frequency positions of the A-IoT synchronization signal within a given frequency range include:

[0157] The frequency position determined by the calculation formula of the 5G / 6G network synchronization signal frequency position, or the frequency position that overlaps or is consistent with the frequency position of the 5G / 6G network synchronization signal, or the frequency position within the PRB range of the 5G / 6G network synchronization signal, or the frequency position within the transmission bandwidth or channel bandwidth range of the 5G / 6G network synchronization signal.

[0158] In this embodiment of the disclosure, for scenarios where A-IoT and 5G / 6G networks coexist, the system determines whether to access the current cell or whether the current frequency location is an overlapping frequency location of A-IoT and 5G / 6G synchronization signals by detecting the first information carried by the received synchronization signal. The first information includes at least one of the following:

[0159] The information carried on the 5G / 6G synchronization sequence / PBCH includes:

[0160] This indicates whether the frequency domain position of the synchronization block where the PBCH is located overlaps with the frequency domain position of the A-IoT downlink synchronization signal; or whether to restrict 5G / 6G user equipment from accessing the cell corresponding to the synchronization block where the PBCH is located; or whether to skip the detection of subsequent SSB transmission opportunities; or whether to ignore the current SSB; or indicates specific downlink transmission time slot format configuration information; or indicates another specific frequency position associated with the current synchronization signal frequency position. There is a specific frequency interval between the current synchronization signal frequency position and the other specific frequency position. The other specific frequency position is the downlink synchronization / transmission frequency position available to the device.

[0161] In this embodiment of the disclosure, the information carried on the A-IoT synchronization signal includes: synchronization signal index information; cell ID information; information indicating whether the current synchronization signal frequency position overlaps with the 5G / 6G synchronization signal frequency position; and information indicating that the current synchronization signal frequency position is associated with another specific frequency position; wherein, there is a specific frequency interval between the current synchronization signal frequency position and the other specific frequency position. The other specific frequency position is a downlink synchronization / transmission frequency position available to the device.

[0162] In this embodiment of the disclosure, for scenarios where A-IoT and 5G / 6G networks coexist, the overlapping synchronization signal frequency positions of A-IoT and 5G / 6G are indicated by sending predefined synchronization signals on predefined resources.

[0163] In one embodiment, the predefined resources include overlapping synchronization signal frequency positions of A-IoT and 5G / 6G and / or non-overlapping synchronization signal time-domain positions of A-IoT and 5G / 6G. The predefined synchronization signals include non-cyclic synchronization signal blocks (NCD-SSBs) and cyclic synchronization signal blocks (CD-SSBs). Each CD-SSB carries at least one of the following information: the CD-SSB index information corresponding to the A-IoT downlink synchronization frequency position, and the A-IoT downlink synchronization frequency positions adjacent to the CD-SSB.

[0164] In one embodiment, the predefined resources include overlapping synchronization signal frequency locations of A-IoT and 5G / 6G and / or non-overlapping synchronization signal time-domain locations of A-IoT and 5G / 6G. The predefined synchronization signals include A-IoT synchronization signals. The A-IoT synchronization signals include a predefined synchronization sequence used to indicate that the A-IoT device ignores the frequency domain location, or that the frequency domain location is unavailable, or that the frequency domain location overlaps with the 5G / 6G synchronization signal frequency domain location.

[0165] In one embodiment, the predefined resources include non-overlapping synchronization signal frequency locations or non-overlapping synchronization signal time-domain locations for A-IoT and 5G / 6G. The predefined synchronization signal includes NCD-SSB.

[0166] In one embodiment, the predefined resources include non-overlapping synchronization signal frequency locations for A-IoT and 5G / 6G. The predefined synchronization signals include A-IoT synchronization signals.

[0167] The above description is merely a preferred embodiment of this disclosure and is not intended to limit the scope of this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A method for determining the frequency position of a downlink synchronization signal, comprising: The downlink synchronization signal frequency position is determined based on the first frequency position and the frequency offset; Downlink synchronization signal transmission is performed based on the downlink synchronization signal frequency position.

2. The method according to claim 1, wherein, The step of determining the downlink synchronization signal frequency position based on the first frequency position and the frequency offset includes: Based on the first frequency position, the first frequency offset, and the second frequency offset, a summation operation is performed to determine the downlink synchronization signal frequency position, expressed by the formula: F = N·ΔF0 + M·ΔF1 + ΔF2 Wherein, the frequency offset includes the first frequency offset and / or the second frequency offset, F represents the downlink synchronization signal frequency position, N·ΔF0 represents the first frequency position, M·ΔF1 represents the first frequency offset, ΔF2 represents the second frequency offset, N is a positive integer, and M is an integer value in the range of 0 to 20; The value of ΔF0 is determined based on at least one of the following: the frequency range of the operating frequency band supported by the device [F min ,F max ]; Granularity ΔF of the channel grid within the operating frequency band Raster Downlink subcarrier spacing (SCS), RF filter bandwidth (F) RF_fir Baseband filter bandwidth F BB_fir Downlink synchronization signal bandwidth F sync Downlink common signal bandwidth F comm Downlink transmission bandwidth F trans Downlink system bandwidth F sys Sampling frequency F smpling Maximum number of downlink connected users N dev Resource reuse mode and the center frequency F of the downlink channel central At least one of them is related; The value of ΔF1 is determined based on at least one of the following: device type; downlink synchronization signal bandwidth F. sync Downlink subcarrier spacing (SCS); downlink channel center frequency (F) central The frequency points of the downlink channel in the 6G system; The value of ΔF2 is determined based on at least one of the following: the frequency range of the operating frequency band supported by the device [F min ,F max ]; Values ​​of ΔF0; Values ​​of ΔF1; Values ​​of N; Values ​​of M.

3. The method according to claim 2, wherein, The value of N is to Integers between; The interval between adjacent values ​​of N is at least one of the following: Here, func(·) represents at least one of the following operations on ·: rounding up, rounding down, rounding to the nearest integer, or retaining the original value.

4. The method according to claim 3, wherein, The value of N includes a start term, a stop term, and the interval. The start term is an N value that is not less than the minimum value of the Global Synchronization Channel Number (GSCN) and not greater than the value of the stop term. The stop term is an N value that is not less than the start term and not greater than the maximum value of the GSCN.

5. The method according to claim 2, wherein, In response to the fact that the frequency range of the operating frequency band supported by the device is 0 to 3 GHz, and the downlink synchronization signal bandwidth F sync The value of ΔF0 is less than 3MHz, the value of ΔF0 is 1200kHz, the value of ΔF2 is 0, the value of the global synchronization channel number GSCN is 3N+(M-3) / 2, and the value of ΔF1 is 50kHz. Alternatively, in response to the fact that the frequency range of the operating frequency band supported by the device is 0 to 1 GHz, and the downlink synchronization signal bandwidth F sync The value of ΔF0 is less than 3MHz, the value of ΔF2 is 600kHz, the value of ΔF2 is 300kHz, the value of the global synchronization channel number GSCN is 266638+3N+(M-3) / 2, and the value of ΔF1 is 50kHz.

6. The method according to claim 2, wherein, M is an even number in the range of 0 to 20, or an odd number in the range of 7 to 20.

7. The method according to claim 2, wherein, ΔF0 takes at least one value from the first set of values, wherein the values ​​in the first set are not less than 180kHz and not greater than 10MHz, or, the first set of values ​​is: {180,360,540,720,900,1080,1260,1440,1620,1800,1980,2160,2340,2520,2700,2880,3060,3240,3420,3600,3780,3960,4140,4320,4500,4680,4860,5040,5220,5400,5580,5760,5940,6120,6300,6480,6660,6840,7020,7200,7380,7560,7740,7920,8100,8280,8460,8640,8820,9000,9180,9360,9540,9720,9900}。 8. The method according to claim 2, wherein, In response to the downlink synchronization signal bandwidth F sync Not less than 3MHz, and the value of ΔF0 is not less than the downlink synchronization signal bandwidth F. sync One-third of which, the value of the Global Synchronization Channel Number (GSCN) is X+N, and the value of X is not less than 32000; Alternatively, in response to the downlink synchronization signal bandwidth F sync For frequencies less than 3MHz, the value of ΔF0 is not less than the downlink synchronization signal bandwidth F. sync One-third and not greater than the downlink system bandwidth F sys The value of the global synchronization channel number GSCN is X+3N+(M-3) / 2, and the value of X is not less than 32000. Alternatively, in response to the downlink synchronization signal bandwidth F sync For frequencies less than 3MHz, the value of ΔF0 is no greater than 900kHz and no less than 180kHz, and the value of ΔF2 is no greater than the downlink synchronization signal bandwidth F. sync Or the downlink transmission bandwidth F trans Or the downlink common signal bandwidth F comm The maximum value in the range, where the global synchronization channel number GSCN is X+3N+(M-3) / 2, and the value of X is not less than 32000.

9. The method according to claim 2, wherein, The value of ΔF2 is 50kHz, 7.5kHz, or 180kHz, or the downlink synchronization signal bandwidth F. sync Or the downlink transmission bandwidth F trans Or the downlink common signal bandwidth F comm A multiple of at least one of them.

10. The method according to claim 1, wherein, The downlink synchronization signal frequency position is a subset of the 5G NR synchronization signal frequency positions, and the subset includes at least one of the following: The positions of one or more pairs of synchronization signal frequencies symmetrical about the center frequency of the downlink physical channel within the frequency range of the operating frequency band supported by the device; The operating frequency band supported by the device is located within the frequency range of one or more synchronization signal frequencies that are lower than or higher than the center frequency of the downlink physical channel, or located in the lower sideband or upper sideband of the downlink physical channel. The location of the synchronization signal frequency within the frequency range of the downlink physical channel's center frequency within the operating frequency band supported by the device; The location of the synchronization signal frequency value that is less than the center point of the frequency range within the frequency range supported by the device's operating frequency band. The frequency position of the synchronization signal that is greater than the center point of the frequency range within the frequency range supported by the device is used as the downlink synchronization signal frequency position of A-IoT. The location of the synchronization signal frequency value at the center point of the frequency range within the frequency range supported by the device. The location of the synchronization signal frequency where the frequency difference within the frequency range of the operating frequency band supported by the device is the smallest and does not exceed the frequency value of the center point of the frequency range. The synchronization signal frequency position within the frequency range where the frequency difference of the operating frequency band supported by the equipment is the smallest and not less than the frequency value of the center point of the frequency range.

11. The method according to claim 1, wherein, The Global Synchronization Channel Number (GSCN) applied to the downlink synchronization signal frequency position includes a start term, an end term, and a predefined interval value. The start term is a value not less than the minimum GSCN and not greater than the end term. The end term is a value not less than the start term and not greater than the maximum GSCN. The predefined interval value is the maximum GSCN value defined for 1 to 5G NR, or the predefined interval value plus the maximum number of synchronization signal frequency positions supported by the device, or the total number of synchronization signal frequency positions defined for 5G NR within the frequency range of the operating frequency band supported by the device, or the downlink synchronization signal bandwidth F. sync , or the number of values ​​that M can take.

12. The method according to claim 1, wherein, The downlink synchronization signal frequency position is determined based on the 5G NR synchronization signal frequency position, the start synchronization signal frequency position, the end synchronization signal frequency position, and the frequency offset value.

13. The method according to claim 1, wherein, The downlink synchronization signal frequency position is the first predefined frequency position within the operating frequency band supported by the device.

14. The method according to claim 2, wherein, The downlink synchronization signal frequency position is a second predefined frequency position, and the second predefined frequency position includes at least one of the following: The 5G NR synchronization signal frequency location; the 6G system's specified synchronization signal frequency location and the corresponding Global Synchronization Channel Number (GSCN) value.

15. The method according to claim 14, wherein, The second predefined frequency position also includes: In response to the fact that the frequency range of the operating frequency band supported by the device is no greater than 3GHz, the second predefined frequency position is N·ΔF0+M·ΔF1+ΔF2, and the value of the global synchronization channel number GSCN is X+3N+(M-3) / 2, where N is a value not less than 0 and not greater than 3000, and the interval between adjacent N values ​​is equal to ΔF0 and / or 2. n And / or related to the subcarrier spacing SCS, where the value of SCS is 2. n *15kHz, where n is an integer not less than 2 and not greater than 10; M takes the value 2*m+1, where m is an integer not less than 0 or 2 n ΔF0 is an integer multiple or common multiple of at least one of 1.44MHz, 17.28MHz, or 180kHz, or 2. n The value of ΔF1 is 50kHz, 15kHz or 2 n An integer multiple or common multiple of at least one of the values; ΔF2 takes the values ​​of SCS, 50kHz, 15kHz or 2 n An integer multiple or common multiple of at least one of the values; X is an integer value not less than 31640 or 41640.

16. The method of claim 14, wherein, The second predefined frequency position also includes: In response to the fact that the frequency range of the operating frequency band supported by the device is not less than 3GHz, the second predefined frequency position is F. start +N·ΔF0, where the value of the global synchronization channel number GSCN is X+N, N is a value that is not less than 0 and not greater than 3000, and the interval between adjacent N values ​​is equal to ΔF0 and / or 2. n And / or related to the subcarrier spacing SCS, where the value of SCS is 2. n *15kHz, where n is an integer not less than 2 and not greater than 10; F start For values ​​not less than 3 GHz, ΔF0 is an integer multiple or common multiple of 3840 kHz, 180 kHz, and 60 kHz, or 2. k X is an integer multiple or common multiple of at least one of the following values: 1.44MHz, 17.28MHz, 15kHz, 60*mkHz, 120kHz, or 180kHz, k is not less than 16, m is a positive number not greater than 10, X is not less than the maximum value of the GSCN applied to the device, or not less than 41640, or X is an integer value not less than 39000 or 49000.

17. The method according to claim 2, wherein, In response to the coexistence of 6G and 5G NR systems, within the frequency range of the operating frequency band supported by the device, the frequency location of the downlink synchronization signal includes at least one of the following: Frequency locations that overlap with or coincide with the frequency location of the 5G / 6G network synchronization signal; frequency locations within the Physical Resource Block (PRB) range where the 5G / 6G network synchronization signal is located; frequency locations within the transmission bandwidth or channel bandwidth range where the 5G / 6G network synchronization signal is located.

18. The method according to claim 17, wherein, The method further includes: By detecting the first information carried by the received synchronization signal, it is determined whether to access the cell or whether the current frequency position is an overlapping frequency position of A-IoT and 5G synchronization signals, or an overlapping frequency position of 5G and 6G synchronization signals, or a synchronization signal frequency position in the case of 6G standalone deployment. The first information includes at least one of the following: Information carried on 5G / 6G synchronization sequences or physical broadcast channels (PBCH); information carried on the synchronization signals of devices.

19. The method of claim 17, wherein, The method further includes: The frequency positions of overlapping A-IoT and 5G synchronization signals, or overlapping 5G and 6G synchronization signals, or synchronization signal frequency positions in the case of 6G standalone deployment, are indicated by sending predefined synchronization signals on predefined resources.

20. A terminal comprising a receiver, a transmitter, and a processor, the terminal being configured to perform the steps of the method of any one of claims 1 to 19 via at least one of the receiver, the transmitter, and the processor.

21. A computer-readable storage medium storing a computer program, wherein, When the computer program is executed by a processor, it implements the steps of the method described in any one of claims 1 to 19.

22. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, performs the steps of the method according to any one of claims 1 to 19.

23. A computer program product comprising a computer program that, when executed by a processor, implements the steps of the method described in any one of claims 1 to 19.

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