CN118042616A - Multi-carrier data transmission method, device, computer equipment, chip and medium - Google Patents
Multi-carrier data transmission method, device, computer equipment, chip and medium Download PDFInfo
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- 239000000969 carrier Substances 0.000 claims abstract description 153
- 238000013507 mapping Methods 0.000 claims abstract description 7
- 238000004590 computer program Methods 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 12
- 238000013506 data mapping Methods 0.000 claims description 4
- 238000001228 spectrum Methods 0.000 abstract description 45
- 238000004891 communication Methods 0.000 description 11
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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Abstract
The embodiment of the specification provides a multi-carrier data transmission method, a multi-carrier data transmission device, a multi-carrier data transmission computer device, a multi-carrier chip and a multi-carrier data transmission medium. The data transmission method comprises the following steps: determining the number of subcarriers corresponding to target data to be transmitted; wherein the number of subcarriers represents the number of a plurality of subcarriers used for transmitting the target data; determining subcarrier intervals of the plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of component carriers on a specified frequency band, so that the component carrier bandwidths are integer multiples of the subcarrier intervals; wherein, the subcarrier spacing of each subcarrier in the plurality of subcarriers is equal; and mapping the target data to the plurality of subcarriers for data transmission. Therefore, the situation that a single subcarrier spans component carriers can be effectively reduced, so that continuous data transmission can be carried out across component carriers when target data are mapped to a plurality of subcarriers, and the use efficiency of spectrum resources is improved.
Description
Technical Field
The embodiment in the specification relates to the technical field of communication, in particular to a multi-carrier data transmission method, a device, computer equipment, a chip and a medium.
Background
The spectrum resources are limited and non-renewable resources, and as the mobile communication network is continuously upgraded, the distribution of the newly allocated spectrum resources is discrete, and idle continuous spectrum resources are difficult to find. To effectively utilize fragmented spectrum resources, an effective solution is to aggregate together continuous or discrete narrowband carriers using carrier aggregation techniques to form a wider complete spectrum.
However, some frequency bands often do not allow the sub-carriers to transmit data or signals across component carriers, and when the data or signals to be transmitted need to occupy a continuous spectrum for transmission, but the total transmission bandwidth required exceeds that of a single component carrier, the data or signals to be transmitted generally need to be limited to one component carrier for transmission, and even if continuous component carrier resources exist, the data or signals cannot be utilized, so in the related art, the use efficiency of the spectrum resources needs to be improved.
Disclosure of Invention
In view of this, various embodiments of the present disclosure are directed to providing a multi-carrier data transmission method, apparatus, computer device, chip, and medium, to improve the efficiency of using spectrum resources when data transmission is performed.
The embodiment of the present specification provides a multi-carrier data transmission method, which includes: determining the number of subcarriers corresponding to target data to be transmitted; wherein the number of subcarriers represents the number of a plurality of subcarriers used for transmitting the target data; determining subcarrier intervals of the plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of component carriers on a specified frequency band, so that the component carrier bandwidths are integer multiples of the subcarrier intervals; wherein, the subcarrier spacing of each subcarrier in the plurality of subcarriers is equal; and mapping the target data to the plurality of subcarriers for data transmission.
Further, the specified frequency band includes a plurality of the component carriers; wherein a plurality of the component carriers are consecutively adjacent on the specified frequency band; the determining the subcarrier spacing of the plurality of subcarriers based on the subcarrier number and the component carrier bandwidths of the component carriers on the specified frequency band includes: determining subcarrier intervals of a plurality of subcarriers based on the subcarrier number and component carrier bandwidths of the plurality of continuously adjacent component carriers on the specified frequency band, so that the plurality of subcarriers can perform data transmission on the target data on the plurality of continuously adjacent component carriers; wherein any one of the sub-carriers does not span any two adjacent component carriers, and component carrier bandwidths of the component carriers are equal.
Further, the determining, based on the number of subcarriers and component carrier bandwidths of a plurality of continuously adjacent component carriers on the specified frequency band, a subcarrier spacing of the plurality of subcarriers includes: determining the number of continuous component carriers of the specified frequency band; the number of the continuous component carriers is the number of a plurality of continuous adjacent component carriers on the specified frequency band; and determining the subcarrier spacing according to the number of continuous component carriers, the component carrier bandwidth and the number of subcarriers.
Further, the determining the subcarrier spacing according to the number of continuous component carriers, the component carrier bandwidth, and the number of subcarriers includes: determining a first product between the number of consecutive component carriers and the component carrier bandwidth; determining a first quotient between the first product and the number of subcarriers; taking as the subcarrier spacing a second product between the k-th power of the first specified value and the p-th power of the second specified value; wherein k is in a first specified range, p is in a second specified range, and the subcarrier spacing is less than or equal to the first quotient.
Further, the component carrier bandwidth is 25kHz; the first specified range is 0-3; the second specified range is 0-5.
Further, the determining the number of subcarriers corresponding to the target data to be transmitted includes: and determining the number of the subcarriers according to the data length of the target data.
Further, the subcarrier spacing is greater than or equal to 1kHz.
Further, the specified frequency band includes a 223MHz-235MHz frequency band.
The embodiment of the present specification provides a multicarrier data transmission apparatus comprising: the subcarrier number determining module is used for determining the subcarrier number corresponding to the target data to be transmitted; wherein the number of subcarriers represents the number of a plurality of subcarriers used for transmitting the target data; a subcarrier spacing determining module, configured to determine subcarrier spacing of the plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of component carriers on a specified frequency band, so that the component carrier bandwidths are integer multiples of the subcarrier spacing; wherein, the subcarrier spacing of each subcarrier in the plurality of subcarriers is equal; and the target data mapping module is used for mapping the target data to the plurality of sub-carriers for data transmission.
Further, the specified frequency band includes a plurality of the component carriers; wherein a plurality of the component carriers are consecutively adjacent on the specified frequency band; the subcarrier spacing determining module is further configured to determine subcarrier spacings of a plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of the plurality of continuously adjacent component carriers on the specified frequency band, so that the plurality of subcarriers can perform data transmission on the target data on the plurality of continuously adjacent component carriers; wherein any one of the sub-carriers does not span any two adjacent component carriers, and component carrier bandwidths of the component carriers are equal.
Further, the subcarrier spacing determining module includes: a continuous component carrier number determining module, configured to determine the number of continuous component carriers in the specified frequency band; the number of the continuous component carriers is the number of a plurality of continuous adjacent component carriers on the specified frequency band; and the subcarrier spacing determining submodule is used for determining the subcarrier spacing according to the number of continuous component carriers, the component carrier bandwidth and the subcarrier number.
Further, the subcarrier spacing determination submodule includes: a subcarrier spacing first determining submodule for determining a first product between the number of consecutive component carriers and the component carrier bandwidth; a second subcarrier spacing determining submodule for determining a first quotient between the first product and the number of subcarriers; a subcarrier spacing third determining submodule for taking a second product between the k-th power of the first specified value and the p-th power of the second specified value as the subcarrier spacing; wherein k is in a first specified range, p is in a second specified range, and the subcarrier spacing is less than or equal to the first quotient.
The embodiment of the present specification provides a computer device, including a memory and a processor, where the memory stores a computer program, and the processor executes the computer program to implement the data transmission method according to any one of the foregoing embodiments.
The embodiment of the present disclosure provides a chip, including a storage unit and a processing unit, where the storage unit stores a computer program, and the processing unit executes the computer program to implement the data transmission method according to any one of the above embodiments.
The present description provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the data transmission method according to any of the above embodiments.
According to the embodiments provided by the specification, the number of the subcarriers of the plurality of subcarriers required by the target data to be transmitted is determined, and the subcarrier intervals of the plurality of subcarriers are determined based on the number of the subcarriers and the component carrier bandwidths of the component carriers on the specified frequency band, so that the component carrier bandwidths are integer multiples of the subcarrier intervals, wherein the subcarrier intervals of any one subcarrier in the plurality of subcarriers are equal, and the target data is mapped to the plurality of subcarriers for data transmission, so that the use efficiency of spectrum resources can be improved when the data transmission is carried out.
Drawings
Fig. 1 is a schematic diagram of a multi-carrier data transmission system according to an embodiment of the present disclosure.
Fig. 2 is a flow chart of a multi-carrier data transmission method according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of a designated frequency band according to an embodiment of the present disclosure.
Fig. 4 is a schematic diagram of a usable spectrum resource provided by an embodiment of the present disclosure.
Fig. 5 is a flowchart of a method for determining a subcarrier spacing according to an embodiment of the present disclosure.
Fig. 6 is a flowchart of a method for determining a subcarrier spacing according to an embodiment of the present disclosure.
Fig. 7 is a schematic diagram of a multicarrier data transmission apparatus according to an embodiment of the present disclosure.
Fig. 8 is a schematic diagram of a computer device according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical solution of the present specification better understood by those skilled in the art, the technical solution of the present specification embodiment will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present specification, and it is apparent that the described embodiment is only a part of the embodiment of the present specification, but not all the embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.
The spectrum resources are limited and non-renewable resources, and as the mobile communication network is continuously upgraded, the distribution of the newly allocated spectrum resources is discrete, and idle continuous spectrum resources are difficult to find. In order to effectively utilize fragmented spectrum resources, an effective solution is to aggregate continuous or discrete narrowband carriers as component carriers using carrier aggregation techniques to form a wider complete spectrum.
However, some frequency bands often do not allow subcarriers to transmit data or signals across component carriers, for example, in an LTE230 wireless broadband communication system applied to the 223MHz-235MHz frequency band, when a signal to be transmitted needs to be continuously sent (e.g. a synchronization signal), or the signal to be transmitted needs to occupy a continuous frequency spectrum for transmission, there may be a case that the required total transmission bandwidth exceeds that of a single component carrier, because the subcarrier spacing is often not a divisor of the component carrier, or the bandwidth of the component carrier is often not an integer multiple of the subcarrier spacing, such as in the LTE230 wireless broadband communication system, the subcarrier spacing is often 2KHz, and the signal to be transmitted needs to be segmented and limited to be transmitted in the same component carrier, so that the signal can be continuously transmitted, but even if continuous component carrier resources exist, the use efficiency of the frequency spectrum resources is low. In addition, when the signal to be transmitted does not need to be continuously transmitted but the required total transmission bandwidth exceeds that of a single component carrier, the signal can be segmented and then transmitted on subcarriers which do not span multiple component carriers in the same or different component carriers, so that the spectrum resources of the component carriers cannot be fully utilized, and the use efficiency of the spectrum resources is low.
Therefore, it is necessary to provide a multi-carrier data transmission method, in which when multi-carrier communication is performed in a specified frequency band, a sub-carrier interval can be determined according to the number of sub-carriers required for target data to be transmitted and an available component carrier bandwidth, the component carrier bandwidth is an integer multiple of the sub-carrier interval, a situation that a single sub-carrier spans component carriers when sub-carriers are allocated on component carriers is prevented, and multiple sub-carriers are made to be continuous on multiple component carriers, so that when the target data to be transmitted is mapped onto corresponding sub-carriers for transmission, the target data can be continuously transmitted across multiple component carriers.
Referring to fig. 1, fig. 1 is a schematic diagram of a multi-carrier data transmission system according to an embodiment of the present disclosure. The data transmission system may include a base station 110 and a plurality of terminals 120, one of the base station 110 and any one of the terminals 120 may be a transmitting terminal, the other may be a receiving terminal, and multi-carrier data transmission may be performed between the transmitting terminal and the receiving terminal.
Referring to fig. 2, fig. 2 is a schematic flow chart of a multi-carrier data transmission method according to the present embodiment, where the method includes steps according to the present embodiment, but may include more or less steps based on conventional or non-inventive labor. The order of steps recited in the embodiments is merely one implementation of a plurality of step execution orders and does not represent a unique execution order. In actual system or server product execution, the methods illustrated in the embodiments may be performed sequentially or in parallel (e.g., in parallel processors or in the context of multi-threaded processing). The data transmission method can be applied to a transmitting end of a multi-carrier data transmission system, and as shown in fig. 2, the data transmission method can include the following steps.
Step S210: determining the number of subcarriers corresponding to target data to be transmitted; wherein the number of subcarriers represents the number of a plurality of subcarriers used for transmitting the target data.
The subcarriers refer to available subcarriers, i.e., subcarriers that can be used to carry target data.
In this embodiment, for the target data to be transmitted, the transmitting end may determine the number of subcarriers required for transmitting the target data, the number of subcarriers being plural, so that the target data may be modulated onto the plural subcarriers by the transmitting end and then transmitted to the receiving end through the plural subcarriers.
Step S220: determining subcarrier intervals of a plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of component carriers on a specified frequency band so that the component carrier bandwidths are integer multiples of the subcarrier intervals; wherein the subcarrier spacing of each subcarrier in the plurality of subcarriers is equal.
The specified frequency band may refer to a frequency band resource specified during data transmission. Referring to fig. 3, fig. 3 is a schematic diagram of a designated frequency band, where the designated frequency band may include component carriers, and the component carriers may be available spectrum resources of the designated frequency band, for example, the component carriers may be at least part of available spectrum resources on the designated frequency band, and remaining spectrum resources are unavailable spectrum resources except for the available spectrum resources on the designated frequency band.
Component carriers (Component Carrier, CCs), also called component carriers or component carriers, may have a corresponding component carrier bandwidth. Component carriers may be aggregated by carrier aggregation operations to obtain a greater transmission bandwidth.
The subcarrier spacing is used to characterize the frequency domain distance between adjacent subcarriers, or to characterize the spectral width of the subcarriers, which is inversely proportional to the symbol length. The symbol length may be a symbol length including or not including a Cyclic Prefix (CP), and a symbol corresponding to the symbol length may be an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol.
In this embodiment, after determining the number of subcarriers, the transmitting end may set the subcarrier spacing to a divisor of the component carrier bandwidth based on the number of subcarriers and the component carrier bandwidth corresponding to the component carrier of the specified frequency band, that is, make the component carrier bandwidth an integer multiple of the subcarrier spacing. By setting the subcarrier spacing to be a divisor of the component carrier bandwidth, it is possible to avoid a situation in which any single subcarrier spans component carriers when a plurality of subcarriers are continuously allocated within a plurality of component carriers.
Step S230: and mapping the target data to a plurality of subcarriers for data transmission.
Specifically, after determining the subcarrier intervals of the plurality of subcarriers, the transmitting end may map the target data onto the plurality of subcarriers, and send the target data to the receiving end through the plurality of subcarriers, so as to complete data transmission between the transmitting end and the receiving end.
In the above embodiment, by determining the number of subcarriers of the subcarriers required for the target data to be transmitted and determining the subcarrier intervals of the plurality of subcarriers as the divisors of the component carrier bandwidths based on the number of subcarriers and the component carrier bandwidths of the component carriers on the specified frequency band, when the plurality of subcarriers are continuously allocated in the plurality of component carriers, the situation that any single subcarrier spans the component carriers can be avoided, so that continuous data transmission can be performed across the component carriers when the target data is mapped to the plurality of subcarriers, and the use efficiency of spectrum resources is improved.
In some embodiments, referring to fig. 3 and 4, the designated frequency band may include a plurality of component carriers. Wherein the plurality of component carriers are contiguous over the designated frequency band, that is, there are no unavailable spectrum resources between the plurality of contiguous adjacent component carriers. For example, the plurality of component carriers may be consecutively adjacent component carriers 1, 2,3, …, N, and any of component carriers 1, 2,3, …, N may be an available spectrum resource.
In this embodiment, the transmitting end may determine the subcarrier spacing of the plurality of subcarriers based on the number of subcarriers and the component carrier bandwidths of the plurality of continuously adjacent component carriers on the designated frequency band, so that the plurality of subcarriers may perform data transmission on the target data on the plurality of continuously adjacent component carriers. Wherein, any subcarrier does not span any two continuous adjacent component carriers, and the component carrier bandwidths of the component carriers are equal. Specifically, after determining that N consecutive adjacent component carriers exist on the specified frequency band, an available spectrum resource may be determined according to the component carrier bandwidth and the number N of consecutive adjacent component carriers, and a subcarrier interval of each subcarrier may be determined based on the available spectrum resource in combination with the determined number M of subcarriers, where the subcarrier interval of any subcarrier is a divisor of any component carrier, that is, the subcarrier interval of any subcarrier is a divisor of the available spectrum resource. Therefore, when the corresponding multiple sub-carriers are allocated to the multiple continuous adjacent component carriers, the multiple sub-carriers of any component carrier can be ensured not to be expanded to the component carrier adjacent to any component carrier, that is, when the multiple sub-carriers are continuously allocated to the multiple continuous adjacent component carriers, the situation that the multiple sub-carriers cross the component carrier can not occur can be ensured, so that the data transmission of target data can be realized across the multiple continuous adjacent component carriers without carrying out segmentation processing on the target data, and the data transmission efficiency can be improved.
In some embodiments, referring to fig. 5, determining the subcarrier spacing of the plurality of subcarriers based on the number of subcarriers and the component carrier bandwidths of the plurality of consecutively adjacent component carriers on the designated frequency band may include the following steps.
Step S510: determining the number of continuous component carriers of a specified frequency band; the number of the continuous component carriers is the number of a plurality of continuous adjacent component carriers on the designated frequency band.
Specifically, the designated frequency band may include a plurality of available spectrum resources, and the transmitting end may select any available spectrum resource of the plurality of available spectrum resources on the designated frequency band, detect the spectrum resource, and determine the number of a plurality of continuously adjacent component carriers included in the spectrum resource.
Step S520: the subcarrier spacing is determined based on the number of consecutive component carriers, the component carrier bandwidth, and the number of subcarriers.
Specifically, after determining the number of component carriers continuously adjacent to each other on any available spectrum resource in the specified frequency band and the number of subcarriers required for transmitting the target data, the transmitting end may determine the subcarrier interval of each subcarrier according to the number of continuous component carriers of the spectrum resource, the component carrier bandwidth of each component carrier, and the number of subcarriers. In this way, the subcarrier spacing corresponding to the target data can be determined on a plurality of continuously adjacent component carriers in any available spectrum resource on the specified frequency band.
In some embodiments, determining the number of subcarriers corresponding to the target data to be transmitted may include: and determining the number of subcarriers according to the data length of the target data. The data length of the target data may represent the size of the target data, and can be used to determine the number of subcarriers required for transmission of the target data.
In some embodiments, referring to fig. 6, determining the subcarrier spacing according to the number of consecutive component carriers, the component carrier bandwidth, and the number of subcarriers may include the following steps.
Step S610: a first product between the number of consecutive component carriers and the component carrier bandwidth is determined.
Step S620: a first quotient between the first product and the number of subcarriers is determined.
Step S630: taking a second product between the k power of the first specified value and the p power of the second specified value as the subcarrier spacing; wherein k is in a first specified range, p is in a second specified range, and the subcarrier spacing is less than or equal to a first quotient.
Specifically, the designated frequency band may include a 223MHz-235MHz frequency band, and the number of consecutive component carriers may refer to the number of consecutive adjacent component carriers within the 223MHz-235MHz frequency band.
Specifically, the first specified value and the second specified value may be positive integers.
Specifically, the component carrier bandwidth may be 25kHz; the first specified range may be 0-3, the second specified range may be 0-5, k may be an integer of the first specified range, and p may be an integer of the second specified range.
In particular, the subcarrier spacing may be greater than or equal to 1kHz to reduce the effects of phase noise and doppler shift on the target data transmission process.
In some embodiments, the subcarrier spacing may be calculated according to equation 1.
… … Equation 1
Wherein,F SCS denotes a subcarrier spacing, the unit is Hz, B denotes a component carrier bandwidth, M denotes the number of subcarriers required for transmitting target data, N denotes the number of component carriers continuously adjacent on any available spectrum resource in the frequency band of 223MHz-235MHz, k may be any integer from 0 to 3, and p may be any integer from 0 to 5.
Specifically, the component carrier bandwidth B may be 25kHz. For example, the subcarrier spacing may be determined to be 1.25KHz, 2.5KHz, 6.25KHz, 12.5KHz, etc. based on equation 1, which is a divisor of the component carrier bandwidth B, so that when a plurality of subcarriers are continuously allocated on a plurality of continuously adjacent component carriers, a situation that a single subcarrier spans the component carriers can be avoided, thereby realizing the continuous transmission of target data across the component carriers.
For example, the target data may be a training sequence signal for synchronous detection, and assuming that there is a training sequence signal with a length of 240 points to perform data transmission in the 223MHz-235MHz band by adopting a multi-carrier data transmission method, if there are 100 continuously adjacent component carriers in an available spectrum resource in the 223MHz-235MHz band, the subcarrier spacing f SCS or equation 1 needs to satisfy. As an example, k is 1, p is 5, that is, the training sequence signal with the subcarrier spacing set to 6.25khz and 240 points occupies 240 subcarriers after serial-parallel conversion, and actually occupies 60 consecutive adjacent component carriers in 100 consecutive adjacent component carriers in the available spectrum resource for continuous data transmission.
Illustratively, for a synchronization signal block (Synchronization Signaling Block, SSB) of a New radio/New air interface (nr) system, the SSB signal is composed of three parts together, namely a primary synchronization signal (Primary Synchronization Signals, PSS), a secondary synchronization signal (Secondary Synchronization Signals, SSS) and PBCH (Physical Broadcast Channel). When the NR system needs to transmit data or signals in the specified frequency range from 223MHz to 235MHz, or when the NR system needs to be transplanted from other frequency ranges to the specified frequency range from 223MHz to 235MHz, since the subcarrier spacing determining scheme in the related art determines the subcarrier spacing to be 2kHz, that is, one component carrier with a component carrier bandwidth of 25kHz contains 11 subcarriers, the subcarrier spacing is not a divisor of the component carrier bandwidth, when the NR system transmits a longer SSB signal or PSS signal in the specified frequency range, even if a plurality of continuously adjacent component carriers exist, the NR system can only perform segmentation processing and sequentially transmit the same component carrier. In the NR system, when SSB signals are transmitted, the SSB signals occupy 240 subcarriers in the frequency domain, and in the case of transmission through one OFDM symbol, occupy 4 OFDM symbol lengths in the time domain. In the related art, because the number of 11 subcarriers allocated in the component carrier is smaller than the number of 240 subcarriers occupied by the SSB signal, when the SSB signal is transmitted in the designated frequency band 223MHz-235MHz, the SSB signal cannot be directly transmitted in the component carrier, but the SSB signal needs to be segmented according to the number of subcarriers in the single component carrier and then respectively transmitted in the component carrier, if the SSB signal can be segmented according to 11 subcarriers as a group to obtain 22 segments, wherein the last 2 subcarriers of the last segment can be filled with 0 transition, so that a single OFDM symbol occupying 240 subcarriers, which originally transmits the SSB signal, needs to be adjusted to 22 OFDM symbols occupying 11 subcarriers, the length of 4 OFDM symbols in the time domain also becomes 88 OFDM symbol lengths, and the transmission of the component carrier cannot utilize spectrum continuity, namely, the frame structure of the original NR system needs to be overturned and reconstructed when being transplanted to the designated frequency band, and the synchronization duration of the SSB signal is longer, the anti-interference performance is poor, and the system data transmission efficiency is low, and the NR system is transplanted to the designated frequency band 223MHz directly according to the related technology.
In this embodiment, the subcarrier spacing may be set to a divisor of the component carrier bandwidth, for example, 2.5kHz, according to the number of subcarriers, the number of continuous component carriers, and the component carrier bandwidth, so that, for the SSB signal occupying 240 subcarriers in the frequency domain and 4 OFDM symbol lengths in the time domain, only any available spectrum resource including 25 continuous adjacent component carriers needs to be determined within the specified frequency band 223MHz-235MHz, and the continuous bandwidth is 625kHz, and the SSB signal can perform continuous data transmission without performing segmentation processing. Compared with the prior art, the NR system can be transplanted to the designated frequency band 223MHz-235MHz without changing the frame structure except the subcarrier interval, the structure change amplitude is small, and the transmission efficiency of the system can be improved. It should be noted that the NR system shifted to the designated frequency band 223MHz-235MHz is merely exemplary, and in practical situations, a multi-carrier communication scheme or system used by other public networks may be further included, for example, digital signal broadcasting (Digital Audio Broadcasting, DAB), digital video broadcasting (Digital Video Broadcasting, DVB), and the like.
The embodiment of the specification provides a multi-carrier data transmission method, which can be applied to a transmitting end of a multi-carrier data transmission system. The data transmission method may include the following steps.
Step S701: determining the number of subcarriers corresponding to target data to be transmitted; wherein the number of subcarriers represents the number of a plurality of subcarriers used for transmitting the target data.
Step S703: determining subcarrier intervals of a plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of component carriers on a specified frequency band so that the component carrier bandwidths are integer multiples of the subcarrier intervals; wherein the subcarrier spacing of each subcarrier in the plurality of subcarriers is equal.
Specifically, the designated frequency band includes the 223MHz-235MHz frequency band.
Specifically, the specified frequency band includes a plurality of component carriers; wherein the plurality of component carriers are consecutively adjacent on the designated frequency band.
Specifically, the number of subcarriers may be determined according to the data length of the target data.
Specifically, the subcarrier spacing may be calculated according to equation 1.
… … Equation 1
Wherein,F SCS denotes a subcarrier spacing, the unit is Hz, B denotes a component carrier bandwidth, M denotes the number of subcarriers required for transmitting target data, N denotes the number of consecutive component carriers on any available spectrum resource in the 223MHz-235MHz band, k may be any integer from 0 to 3, and p may be any integer from 0 to 5. Wherein, any subcarrier does not span any two continuous adjacent component carriers, and the component carrier bandwidths of the component carriers are equal.
Specifically, the component carrier bandwidth is 25kHz; the first specified range is 0-3; the second specified range is 0-5.
Specifically, the subcarrier spacing is greater than or equal to 1kHz.
Step S705: and mapping the target data to a plurality of subcarriers for data transmission.
The embodiment of the specification provides a multi-carrier data transmission device. The data transmission device can be applied to the transmitting end of a multi-carrier data transmission system. Referring to fig. 7, the data transmission apparatus may include a subcarrier number determining module 710, a subcarrier spacing determining module 720, and a target data mapping module 730.
A subcarrier number determining module 710, configured to determine the number of subcarriers corresponding to the target data to be transmitted; wherein the number of subcarriers represents the number of a plurality of subcarriers used for transmitting the target data;
A subcarrier spacing determining module 720, configured to determine subcarrier spacing of the plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of the component carriers on the specified frequency band, so that the component carrier bandwidths are integer multiples of the subcarrier spacing; wherein, the subcarrier intervals of all subcarriers in the plurality of subcarriers are equal;
the target data mapping module 730 is configured to map target data onto a plurality of subcarriers for data transmission.
In some embodiments, the designated frequency band includes a plurality of component carriers; wherein the plurality of component carriers are consecutively adjacent on the designated frequency band. The subcarrier spacing determining module 720 is further configured to determine subcarrier spacing of the plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of the plurality of continuously adjacent component carriers on the specified frequency band, so that the plurality of subcarriers can perform data transmission on the target data on the plurality of continuously adjacent component carriers; wherein, any subcarrier does not span any two continuous adjacent component carriers, and the component carrier bandwidths of the component carriers are equal.
In some embodiments, the subcarrier spacing determining module 720 may include a consecutive component carrier number determining module and a subcarrier spacing determining submodule. The continuous component carrier number determining module is used for determining the number of a plurality of continuous adjacent component carriers on a specified frequency band; the subcarrier spacing determining submodule is used for determining subcarrier spacing according to the number of continuous component carriers, the component carrier bandwidth and the number of subcarriers.
In some embodiments, the subcarrier spacing determination submodule may include a subcarrier spacing first determination submodule, a subcarrier spacing second determination submodule, and a subcarrier spacing third determination submodule. Wherein, the sub-carrier interval first determining submodule is used for determining a first product between the number of continuous component carriers and the component carrier bandwidth; a second subcarrier spacing determining submodule for determining a first quotient between the first product and the number of subcarriers; a subcarrier spacing third determining submodule for taking a second product between the k-th power of the first specified value and the p-th power of the second specified value as a subcarrier spacing; wherein k is in a first specified range, p is in a second specified range, and the subcarrier spacing is less than or equal to a first quotient.
The specific functions and effects achieved by the data transmission device may be explained with reference to other embodiments of the present specification, and will not be described herein. The various modules in the data transmission device may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in hardware or independent of a processor in the computer device, or can be stored in a memory in the computer device in a software mode, so that the processor can call and execute the operations corresponding to the modules.
Referring to fig. 8, in some embodiments, a computer apparatus may be provided, including a memory and a processor, where the memory stores a computer program, and the processor implements the data transmission method in the above embodiments when executing the computer program.
The present disclosure further provides a chip, including a storage unit and a processing unit, where the storage unit stores a computer program, and the processing unit implements the data transmission method in any of the foregoing embodiments when executing the computer program.
The present specification also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a computer, causes the computer to perform the data transmission method of any of the above embodiments.
The present description also provides a computer program product comprising instructions which, when executed by a computer, cause the computer to perform the data transmission method of any of the above embodiments.
In one embodiment, a computer device is provided, which may be a terminal, and the internal structure thereof may be as shown in fig. 8. The computer device includes a processor, a memory, and a communication interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the computer device is used for carrying out wired or wireless communication with an external terminal, and the wireless mode can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a data transmission method.
It will be appreciated that the specific examples herein are intended only to assist those skilled in the art in better understanding the embodiments of the present disclosure and are not intended to limit the scope of the present invention.
It should be understood that, in various embodiments of the present disclosure, the sequence number of each process does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present disclosure.
It will be appreciated that the various embodiments described in this specification may be implemented either alone or in combination, and are not limited in this regard.
Unless defined otherwise, all technical and scientific terms used in the embodiments of this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to limit the scope of the description. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be appreciated that the processor of the embodiments of the present description may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a Digital signal processor (Digital SignalProcessor, DSP), an Application SPECIFIC INTEGRATED Circuit (ASIC), an off-the-shelf programmable gate array (Field Programmable GATE ARRAY, FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The methods, steps and logic blocks disclosed in the embodiments of the present specification may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present specification may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
It will be appreciated that the memory in the embodiments of this specification may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM, EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash memory, among others. The volatile memory may be Random Access Memory (RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein can be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present specification.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system, apparatus and unit may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this specification, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.
In addition, each functional unit in each embodiment of the present specification may be integrated into one processing unit, each unit may exist alone physically, or two or more units may be integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present specification may be essentially or portions contributing to the prior art or portions of the technical solutions may be embodied in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present specification. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a read-only memory (ROM), a random-access memory (RAM), a magnetic disk, or an optical disk, etc.
The foregoing is merely specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope disclosed in the present disclosure, and should be covered by the scope of the present disclosure. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (15)
1. A multi-carrier data transmission method, the data transmission method comprising:
determining the number of subcarriers corresponding to target data to be transmitted; wherein the number of subcarriers represents the number of a plurality of subcarriers used for transmitting the target data;
determining subcarrier intervals of the plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of component carriers on a specified frequency band, so that the component carrier bandwidths are integer multiples of the subcarrier intervals; wherein, the subcarrier spacing of each subcarrier in the plurality of subcarriers is equal;
And mapping the target data to the plurality of subcarriers for data transmission.
2. The data transmission method according to claim 1, wherein the specified frequency band includes a plurality of the component carriers; wherein a plurality of the component carriers are consecutively adjacent on the specified frequency band;
The determining the subcarrier spacing of the plurality of subcarriers based on the subcarrier number and the component carrier bandwidths of the component carriers on the specified frequency band includes:
Determining subcarrier intervals of a plurality of subcarriers based on the subcarrier number and component carrier bandwidths of the plurality of continuously adjacent component carriers on the specified frequency band, so that the plurality of subcarriers can perform data transmission on the target data on the plurality of continuously adjacent component carriers; wherein any one of the sub-carriers does not span any two adjacent component carriers, and component carrier bandwidths of the component carriers are equal.
3. The method according to claim 2, wherein the determining the subcarrier spacing of the plurality of subcarriers based on the number of subcarriers and the component carrier bandwidths of the plurality of consecutively adjacent component carriers on the specified frequency band comprises:
Determining the number of continuous component carriers of the specified frequency band; the number of the continuous component carriers is the number of a plurality of continuous adjacent component carriers on the specified frequency band;
And determining the subcarrier spacing according to the number of continuous component carriers, the component carrier bandwidth and the number of subcarriers.
4. The data transmission method according to claim 3, wherein the determining the subcarrier spacing according to the number of consecutive component carriers, the component carrier bandwidth, and the number of subcarriers comprises:
Determining a first product between the number of consecutive component carriers and the component carrier bandwidth;
determining a first quotient between the first product and the number of subcarriers;
Taking as the subcarrier spacing a second product between the k-th power of the first specified value and the p-th power of the second specified value; wherein k is in a first specified range, p is in a second specified range, and the subcarrier spacing is less than or equal to the first quotient.
5. The data transmission method of claim 4, wherein the component carrier bandwidth is 25kHz; the first specified range is 0-3; the second specified range is 0-5.
6. The method for data transmission according to claim 1, wherein the determining the number of subcarriers corresponding to the target data to be transmitted includes:
and determining the number of the subcarriers according to the data length of the target data.
7. The data transmission method according to claim 1, wherein the subcarrier spacing is greater than or equal to 1kHz.
8. The data transmission method according to claim 1, wherein the specified frequency band includes a 223MHz-235MHz frequency band.
9. A multi-carrier data transmission apparatus, the data transmission apparatus comprising:
The subcarrier number determining module is used for determining the subcarrier number corresponding to the target data to be transmitted; wherein the number of subcarriers represents the number of a plurality of subcarriers used for transmitting the target data;
A subcarrier spacing determining module, configured to determine subcarrier spacing of the plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of component carriers on a specified frequency band, so that the component carrier bandwidths are integer multiples of the subcarrier spacing; wherein, the subcarrier spacing of each subcarrier in the plurality of subcarriers is equal;
and the target data mapping module is used for mapping the target data to the plurality of sub-carriers for data transmission.
10. The data transmission apparatus according to claim 9, wherein the specified frequency band includes a plurality of the component carriers; wherein a plurality of the component carriers are consecutively adjacent on the specified frequency band; the subcarrier spacing determining module is further configured to determine subcarrier spacings of a plurality of subcarriers based on the number of subcarriers and component carrier bandwidths of the plurality of continuously adjacent component carriers on the specified frequency band, so that the plurality of subcarriers can perform data transmission on the target data on the plurality of continuously adjacent component carriers; wherein any one of the sub-carriers does not span any two adjacent component carriers, and component carrier bandwidths of the component carriers are equal.
11. The data transmission apparatus according to claim 10, wherein the subcarrier spacing determining module comprises:
a continuous component carrier number determining module, configured to determine the number of continuous component carriers in the specified frequency band; the number of the continuous component carriers is the number of a plurality of continuous adjacent component carriers on the specified frequency band;
and the subcarrier spacing determining submodule is used for determining the subcarrier spacing according to the number of continuous component carriers, the component carrier bandwidth and the subcarrier number.
12. The data transmission apparatus of claim 11, wherein the subcarrier spacing determination submodule comprises:
A subcarrier spacing first determining submodule for determining a first product between the number of consecutive component carriers and the component carrier bandwidth;
a second subcarrier spacing determining submodule for determining a first quotient between the first product and the number of subcarriers;
a subcarrier spacing third determining submodule for taking a second product between the k-th power of the first specified value and the p-th power of the second specified value as the subcarrier spacing; wherein k is in a first specified range, p is in a second specified range, and the subcarrier spacing is less than or equal to the first quotient.
13. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the data transmission method of any of claims 1 to 8 when executing the computer program.
14. A chip comprising a memory unit and a processing unit, the memory unit storing a computer program, characterized in that the processing unit implements the data transmission method according to any one of claims 1 to 8 when executing the computer program.
15. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the data transmission method of any one of claims 1 to 8.
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