CN112367154A - Resource mapping processing method and device based on electric power wireless private network - Google Patents
Resource mapping processing method and device based on electric power wireless private network Download PDFInfo
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Abstract
The application discloses a resource mapping processing method and a device of a baseband power wireless private network, in the method, if a carrier wave allocated to a terminal is a plurality of continuous carrier waves, the plurality of continuous carrier waves are used as a whole for resource mapping, so that bandwidth resources of the plurality of continuous carrier waves are mapped into two guard bands positioned at two sides of a frequency band corresponding to the bandwidth resources and a plurality of continuous sub-carrier waves positioned between the two guard bands, and therefore, the guard bands do not need to be configured for each carrier wave independently, the occupied bandwidth of the guard bands is reduced, the number and the total bandwidth of the sub-carrier waves capable of bearing modulation symbols are increased, the waste of bandwidth resources is reduced, the frequency spectrum utilization rate is improved, and the service data transmission rate is improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a resource mapping processing method and apparatus based on a power wireless private network.
Background
The electric power wireless private network is a broadband wireless access system which is organically combined with an electric power dedicated 230MHZ frequency spectrum according to the requirements of a smart power network terminal communication access network, is deeply customized and developed based on key technologies such as discrete narrowband multi-frequency point aggregation, dynamic frequency spectrum sensing, software radio and the like. The wireless private power network provides possibility for further extension of the power grid to the tail-end distribution network.
However, the problems of low spectrum utilization rate and low service rate generally exist in the existing power wireless private network.
Disclosure of Invention
The application aims to provide a resource mapping processing method based on a power wireless private network so as to improve the utilization rate of a frequency spectrum. In addition, the application also provides a resource mapping processing device based on the electric power wireless private network, so as to ensure the application and implementation of the method in practice.
In order to achieve the purpose, the application provides the following technical scheme:
in a first aspect, the present application provides a resource mapping processing method based on a power wireless private network, including:
determining a plurality of contiguous carriers allocated to a terminal;
and mapping the bandwidth resources formed by the continuous carriers into a first guard band, a second guard band and a plurality of continuous sub-carriers between the first guard band and the second guard band.
In a second aspect, the present application provides a resource mapping processing apparatus based on a wireless private power network, including:
a first determination unit configured to determine a plurality of consecutive carriers allocated to a terminal;
a bandwidth mapping unit, configured to map a bandwidth resource formed by the multiple consecutive carriers into a first guard band, a second guard band, and multiple consecutive subcarriers located between the first guard band and the second guard band.
According to the scheme, if the carrier allocated to the terminal is a plurality of continuous carriers, the continuous carriers are subjected to resource mapping as a whole, so that bandwidth resources of the continuous carriers are mapped into two guard bands located on two sides of a frequency band corresponding to the resource bandwidth and a plurality of continuous subcarriers located between the two guard bands, and therefore, a guard band does not need to be configured for each carrier independently, the bandwidth occupied by the guard bands is favorably reduced, the number and the total bandwidth of the subcarriers capable of bearing modulation symbols are increased, bandwidth resource waste is reduced, the spectrum utilization rate is improved, and the service data transmission rate is favorably improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of bandwidth resources of multiple continuous carriers and subcarriers and guard bands after resource mapping in the prior art;
fig. 2 is a schematic flowchart of a resource mapping processing method of a wireless private network according to an embodiment of the present application;
fig. 3 is a schematic diagram of bandwidth resources of multiple contiguous carriers and sub-carriers and guard bands after resource mapping according to the present application;
fig. 4 is a flowchart illustrating a resource mapping processing method of a wireless private network according to another embodiment of the present application;
fig. 5 is a flowchart illustrating a resource mapping processing method of a wireless private network according to another embodiment of the present application;
fig. 6 is a schematic diagram illustrating a calculation flow of the bandwidth of the guard band and the number of subcarriers according to an embodiment of the present application;
fig. 7 is a schematic diagram illustrating a schematic diagram of a baseband frequency domain data processing flow of an LTE-G system according to an embodiment of the present application;
fig. 8 is a schematic diagram illustrating a baseband frequency domain data processing flow of an IoT-G system according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a resource mapping processing apparatus based on a wireless private network according to an embodiment of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be practiced otherwise than as specifically illustrated.
Detailed Description
The inventor of the application discovers that the resource mapping process in the current power wireless private network is as follows through research: in the power wireless private network, in the process of resource mapping, each carrier is processed respectively, and besides being mapped into a plurality of subcarriers, the bandwidth resource of each carrier also needs to reserve guard bands on two sides of the plurality of subcarriers. The guard band is to reduce interference of spectral energy leakage of a carrier wave to an adjacent carrier wave, so that a guard band is left between two carrier waves. Therefore, the guard band cannot be used for transmitting valid data, and only the valid data is carried on the sub-carriers.
As shown in fig. 1, the LTE-G standard is illustrated in fig. 1, where the bandwidth of each carrier is 25KHZ, so that the bandwidth of each carrier can be mapped onto 11 subcarriers, and the bandwidth of each subcarrier is 2KHZ, as shown in 101 of fig. 1, the 11 subcarriers occupy a bandwidth of 22KHZ, and the bandwidth of 25KHZ except the bandwidth of 22KHZ is the bandwidth of two guard bands. As can be seen from fig. 1, the bandwidth of 1.5KHZ is reserved on both sides of the 11 subcarriers.
As can be seen from fig. 1, in the process of performing resource mapping, each carrier needs to reserve a guard band with a certain bandwidth. However, in the wireless private network, in the case that a plurality of continuous carriers are allocated to the power industry for use, if a guard band is reserved between different carriers, the guard band cannot be used for transmitting valid data, which inevitably results in waste of bandwidth resources, so that the spectrum utilization rate is low, and the transmission rate of service data is also affected.
Based on the research, the resource mapping method of the power wireless private network provides a new resource mapping mode.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without inventive step, are within the scope of the present disclosure.
The application provides a resource mapping processing method based on a power wireless private network, which can be applied to a base station or a terminal in the power wireless private network.
Referring to fig. 2, the method of the present embodiment may include steps S201-S202. Wherein:
s201, a plurality of consecutive carriers assigned to the terminal are determined.
It is understood that the plurality of consecutive carriers refers to a plurality of carriers that are sequentially adjacent on the frequency band.
In the communication process between the base station in the power wireless private network and the terminal in the power wireless private network, the base station allocates a plurality of continuous carriers that the terminal can occupy.
For example, when data needs to be transmitted from the base station side to the terminal side, the base station needs to determine a plurality of consecutive carriers allocated to the terminal.
For another example, when data needs to be transmitted from the terminal side, the terminal may determine, from a control message sent by the base station, a plurality of consecutive carriers allocated to the terminal by the base station.
The electric power wireless private network refers to a 230MHZ electric power wireless private network, uses a 7MHz bandwidth in 223-235MHz, and takes 25KHz as a basic distribution unit. Correspondingly, in the electric wireless private network, the bandwidth of each carrier is 25KHZ, and a plurality of continuous carriers actually form a plurality of continuous bandwidth resources formed by 25 KHZ. For example, 2 consecutive carriers constitute a 50KHZ contiguous bandwidth resource.
It should be noted that the communication system between the communication base station and the terminal in the power wireless private network may include two systems, one is a Long Term Evolution (LTE) system used in the power wireless private network, which is abbreviated as LTE-G system, and the other is an Internet of Things (IOT) system used in the power wireless private network, which is abbreviated as IOT-G system. Generally, the standard supported by the terminal is one of the two standards according to actual needs, and accordingly, data transmission between the terminal and the base station is performed based on one of the two standards. In the embodiment of the present application, the bandwidth of the carrier is the same regardless of the format, that is, each carrier is 25KHZ bandwidth, but the bandwidth of the individual sub-carriers may be different in different formats. For example, in the LTE-G scheme, the bandwidth of each subcarrier is 2KHZ, and in the IOT-G scheme, the bandwidth of each subcarrier is 3.75KHZ, wherein the content related to the subcarriers will be described in detail later.
S202: and mapping the bandwidth resource formed by the continuous carriers into a first guard band, a second guard band and a plurality of continuous sub-carriers between the first guard band and the second guard band.
It can be understood that, in the communication process between the base station and the terminal, data signals to be transmitted need to be carried by subcarriers, and therefore, after a plurality of continuous carriers that need to be occupied by the terminal are determined, the carriers need to be mapped to the subcarriers.
Unlike the conventional method of performing resource mapping processing on each carrier individually, the present application performs resource mapping on a plurality of continuous carriers as a whole. Therefore, the bandwidth resources corresponding to the whole plurality of continuous carriers are uniformly mapped into the plurality of continuous sub-carriers, and meanwhile, only the guard bands need to be reserved on two sides of the frequency band corresponding to the bandwidth resources, and the first guard band and the second guard band are respectively arranged on two sides of the frequency band corresponding to the plurality of continuous sub-carriers.
For convenience of understanding, referring to fig. 3, an LTE-G standard is illustrated in fig. 3, wherein a bandwidth of each carrier is 25KHZ, and after resource mapping, consecutive carriers are mapped to a first guard band 301, a second guard band 302, and a plurality of consecutive subcarriers 303 between the first guard band and the second guard band. In fig. 3, the first guard band and the second guard band are 2KHZ, and the bandwidth 304 of each subcarrier is 2KHZ, it can be seen that in the resource mapping process of the present application, the bandwidth resources of 2 consecutive carriers are uniformly mapped to 23 subcarriers, and since the bandwidth of each subcarrier is 2KHZ, the total bandwidth of 23 subcarriers is 46 KHZ.
As can be seen from fig. 1 and fig. 3, taking LTE-G as an example, the base station allocates 2 continuous carriers to the terminal, the bandwidth of each carrier is 25KHZ, and the total bandwidth of the formed continuous carriers is 50 KHZ. In the prior art resource mapping shown in fig. 1, each carrier is separately resource mapped, and each carrier is mapped into 11 sub-carriers and two guard bands, where the total bandwidth of the 11 sub-carriers is 22KHZ, so that the effective bandwidth for transmitting data after resource mapping of the two carriers is 44 KHZ. As can be seen from fig. 3, after the scheme of the present application is used to perform resource mapping on the whole bandwidth resource constituted by a plurality of continuous carriers, the resource mapping can be mapped to 23 continuous subcarriers, and the total bandwidth of the subcarriers is 46 KHZ. Therefore, the method provided by the application can effectively improve the frequency spectrum utilization rate of the continuous carrier. Of course, fig. 3 is only an example, and the frequency utilization rate is improved more obviously as the number of continuous carriers is increased.
It is to be understood that after a plurality of consecutive carriers are mapped to subcarriers, modulation symbols to be transmitted (also referred to as modulated symbols, or modulated constellation symbols) may also be modulated onto the subcarriers. In this embodiment, a plurality of modulation symbols to be transmitted may be modulated onto a plurality of continuous subcarriers, and baseband frequency domain data is constructed based on the first guard band, the second guard band, and the plurality of continuous subcarriers modulated with the plurality of modulation symbols, so as to complete the entire complete resource mapping process.
Wherein the number of modulation symbols modulated onto the plurality of continuous subcarriers is consistent with the number of the plurality of continuous subcarriers, such that each subcarrier carries one modulation symbol.
It is to be understood that the plurality of modulation symbols are only modulated onto a plurality of consecutive subcarriers, and no modulation symbol is carried on the first guard band and the second guard band. Accordingly, the baseband frequency domain data is actually a set of values that reflect what is the case for the modulation symbols carried on the first guard band, the second guard band, and the plurality of consecutive subcarriers. Of course, when the first guard band, the second guard band, and the plurality of consecutive subcarriers modulated with the plurality of modulation symbols are determined, the baseband frequency domain data is determined accordingly, and the process of specifically obtaining the baseband frequency domain data is not limited in this application.
According to the scheme, if the carrier allocated to the terminal is a plurality of continuous carriers, the continuous carriers are subjected to resource mapping as a whole, so that bandwidth resources of the continuous carriers are mapped into two guard bands located on two sides of a frequency band and a plurality of continuous subcarriers located between the two guard bands, a guard band does not need to be configured for each carrier independently, the reduction of bandwidth occupied by the guard bands is facilitated, the number and total bandwidth of the subcarriers capable of bearing modulation symbols are increased, bandwidth resource waste is reduced, the spectrum utilization rate is improved, and the service data transmission rate is improved.
The inventor of the present application researches and discovers the processes of resource mapping, filtering processing and the like in the existing power wireless private network: in the prior art, after resource mapping is performed on each carrier individually, fourier transform and filtering processing need to be performed on each mapped carrier, which may cause a large amount of data to be processed and affect a service rate.
In order to reduce the data volume, on the basis of carrying out resource mapping on a plurality of continuous carriers as a whole, the method and the device only need to carry out Fourier transform and filtering processing on the obtained baseband frequency domain resources once, so that the data processing volume can be reduced, the data processing efficiency can be improved, and the efficiency of transmitting service data can be improved. Specifically, refer to fig. 4, which shows a flowchart of another embodiment of the resource mapping processing method based on the private wireless power grid provided in the present application, and specifically includes steps S401 to S404. Wherein:
s401: a plurality of consecutive carriers assigned to the terminal is determined.
This step can refer to step S201 in the above embodiments, and is not described herein again.
S402: and mapping the bandwidth resource formed by the continuous carriers into a first guard band, a second guard band and a plurality of continuous sub-carriers between the first guard band and the second guard band.
This step can refer to step S202 in the above embodiments, and is not described herein again.
S403: modulating a plurality of modulation symbols to be transmitted onto a plurality of continuous subcarriers, and constructing baseband frequency domain data based on the first guard band, the second guard band and the plurality of continuous subcarriers modulated with the plurality of modulation symbols.
The subcarriers are a transport medium for carrying the modulation symbols, and therefore, before data is transmitted between the base station and the terminal, a party (base station or terminal) to send data needs to modulate a plurality of modulation symbols to be transmitted onto a plurality of continuous subcarriers, and after modulation, baseband frequency domain data constructed based on the first guard band, the second guard band, and the plurality of continuous subcarriers modulated with the plurality of modulation symbols is obtained.
For example: modulating the modulation symbol by OFDM (Orthogonal Frequency Division Multiplexing), specifically, modulating the modulation symbol onto a subcarrier by using a corresponding relationship between a constellation diagram and the modulation symbol in the OFDM.
S403: and carrying out fast Fourier transform and filtering processing on the baseband frequency domain data.
The baseband frequency domain data belongs to frequency domain data, and in order to obtain time domain data, the baseband frequency domain data needs to be subjected to fourier transform, and then to filtering processing to obtain a required signal.
According to the above technical solution, the resource mapping processing method based on the power wireless private network provided by the present application maps the resources of a plurality of continuous carriers as a whole, so that bandwidth resources of the plurality of continuous carriers are mapped to two guard bands located at two sides of a frequency band and a plurality of continuous subcarriers located between the two guard bands, and thus baseband frequency domain data obtained by modulating modulation symbols to be transmitted to the mapped plurality of continuous subcarriers is also a whole, so that the processes of performing fast fourier transform and filtering processing on the baseband frequency domain data are performed only once, compared with the prior art in which the processes of performing fast fourier transform and filtering processing on the baseband frequency domain resources obtained by resource mapping on different carriers are performed separately, the present application can greatly reduce the times of fast fourier transform and filtering processing, therefore, the data processing times are reduced, and the data processing amount is reduced.
It is understood that, in the case that the number of consecutive carriers is different, the total bandwidth of the multiple consecutive carriers will also be different, and accordingly, the number of consecutive sub-carriers to be mapped and the bandwidth of the guard band to be reserved will also be different when the number of consecutive carriers is different. Therefore, before performing resource mapping, the present application may also determine the bandwidth of the corresponding guard band and the specific number of the subcarriers required for performing resource mapping on the multiple consecutive carriers. Correspondingly, under the condition that the number of the continuous carriers is different, when the baseband frequency domain data obtained after the resource mapping is subjected to fast Fourier transform and filtering processing, the parameters of the fast Fourier transform and the filtering processing are different, so that the method and the device can also determine the related parameters of the fast Fourier transform and the filtering processing according to a plurality of continuous carriers involved in the resource mapping.
For example, referring to fig. 5, which shows a flowchart of another embodiment of the resource mapping processing method of the power wireless private network, the method of the embodiment includes steps S501 to S505. Wherein:
s501: a plurality of consecutive carriers assigned to the terminal is determined.
Step S201 can be referred to in this step, and details are not repeated here.
S502: a target bandwidth of a guard band and a target number of subcarriers required for resource mapping of a plurality of contiguous carriers as a whole are determined.
Before resource mapping is performed, the number of subcarriers to which the multiple continuous carriers can be mapped and the bandwidth of each guard band need to be determined, for convenience of distinction, the bandwidth required by each guard band is referred to as a target bandwidth, and the number of subcarriers required for resource mapping is referred to as a target number.
And the process of determining the target bandwidth of the guard band and the target number of subcarriers required for resource mapping a plurality of contiguous carriers as a whole can be implemented in 2 ways.
Firstly, the target bandwidth of the guard band and the target data of the sub-carriers corresponding to the number of the continuous carriers recorded in the resource processing control table are obtained from the table.
In one example, determining a target bandwidth of a guard band and a target number of subcarriers required for resource mapping a plurality of contiguous carriers as a whole comprises:
determining the target bandwidth of the guard band and the target number of the subcarriers corresponding to the number of the carriers of the plurality of continuous carriers from a resource processing control table, wherein the resource processing control table comprises: the method comprises the steps that the bandwidth of a guard band and the number of subcarriers corresponding to multiple different numbers of continuous carriers respectively are determined, wherein the bandwidth of the guard band and the number of the subcarriers corresponding to each number of continuous carriers are determined based on the power wireless communication system supported by a terminal and the set spectrum utilization rate, and the bandwidth of the guard band and the number of the subcarriers are required for resource mapping of the number of continuous carriers as a whole.
Note that the bandwidth of the guard band and the number of subcarriers corresponding to the number of consecutive carriers recorded in the resource processing control table are calculated by a calculation method in advance, and the result of the calculation is recorded in the resource processing control table.
And secondly, calculating the target bandwidth of the guard band of the continuous carrier and the target data of the sub-carrier according to the bandwidth of the continuous carrier and the given spectrum utilization rate.
Referring to fig. 6, in one example, the bandwidth of the guard band and the number of subcarriers required for resource mapping a plurality of consecutive carriers as a whole may be obtained according to the calculation process shown in steps S601-S605.
S601: and obtaining the total bandwidth of the carriers corresponding to the continuous carriers based on the total number of the continuous carriers and the bandwidth of each carrier.
The total carrier bandwidth is the sum of a plurality of contiguous carrier bandwidths, for example: the base station allocates 5 continuous carriers to the terminal, and the bandwidth of each carrier is 25KHZ, so that the total bandwidth of the carrier is 125 KHZ.
S602: and taking the product of the total bandwidth of the carriers and the set spectrum utilization rate as the effective bandwidth.
It should be noted that the spectrum utilization ratio is preset, and the effective bandwidth in the total bandwidth of the carrier is calculated according to the preset spectrum utilization ratio.
Namely: the effective bandwidth is the total bandwidth of the carrier. For example: the frequency spectrum utilization rate is 96%, the total bandwidth of the carrier wave is 125KHZ, and the effective bandwidth is 120 KHZ.
S603: and rounding the quotient obtained by dividing the effective bandwidth by the bandwidth of a single subcarrier to obtain the number of the subcarriers.
The effective bandwidth is an estimation bandwidth for estimating the number of subcarriers, that is, a target number of subcarriers in a plurality of consecutive carriers can be obtained, and the effective bandwidth needs to be divided by the bandwidth of a single subcarrier.
For example: taking the power wireless private network LTE-G as an example, assuming that the calculated effective bandwidth is 95.78KHZ, and the bandwidth of a single subcarrier in LTE-G is 2KHZ, the number of subcarriers is 95.78KHZ/2KHZ, which is 47.89, and 47 is obtained by rounding.
S604: and calculating the product of the number of the subcarriers and the bandwidth of a single subcarrier to obtain the total bandwidth of the subcarriers occupied by the subcarriers allocated in the total bandwidth of the subcarriers.
It should be noted that the effective bandwidth may not be consistent with the total bandwidth of the subcarriers, and the effective bandwidth is calculated from the set spectrum utilization and the total bandwidth of the subcarriers, so the calculated effective bandwidth may not necessarily be a multiple of the subcarriers, that is, cannot be divided by the number of subcarriers, for example: the number of subcarriers calculated in the above is 47.89, there are 2 decimal places, and 47 is obtained after rounding, so the total bandwidth of the subcarriers is 47 × 2KHZ to 94 KHZ.
S605: and dividing the difference value of the total bandwidth of the subcarriers subtracted by the total bandwidth of the carriers by 2 to obtain the bandwidth of each guard band.
In the total bandwidth of the carrier, the remaining bandwidth except the total bandwidth of the sub-carriers is used as a guard band. For this purpose, subtracting the total bandwidth of the subcarriers from the total bandwidth of the carriers can obtain the bandwidth of the guard band, for example: assuming that the total bandwidth of the carrier is 100KHZ and the total bandwidth of the sub-carriers is 94KHZ, the total bandwidth of the two guard bands is 6KHZ, and the bandwidth of each guard band is 3 KHZ.
And calculating the target number of the corresponding sub-carriers and the target bandwidth of the guard band under a certain frequency spectrum utilization rate and a certain total carrier bandwidth according to the mode.
It can be understood that the resource handling control table includes bandwidths of guard bands corresponding to a plurality of different numbers of consecutive carriers, and the number of subcarriers. Referring to table 1, table 1 shows a power wireless private network LTE-G resource processing control table, where Nsb represents the number of continuous carriers, Assigned continuous bandwidth (KHz) represents the total bandwidth of the continuous carriers, Nsc represents the number of subcarriers to be mapped, guard band (KHz) represents the bandwidth of each guard band, Nfft represents 64 points of inverse fast fourier transform, fs (ksps) represents the baseband sampling frequency of an intermediate frequency signal, and spectrum utilization represents spectrum utilization, and according to the resource processing control table, the guard bands, the number of subcarriers, and other related information corresponding to multiple different numbers of continuous carriers can be recorded.
TABLE 1
And when the number of the continuous carriers is determined, acquiring related data corresponding to the number of the continuous carriers in a mode of inquiring the table 1. That is, the number of the continuous carriers is looked up in table 1 to obtain the number of the sub-carriers to be mapped corresponding to the number of the continuous carriers, the bandwidth of each guard band, the number of the inverse fast fourier transform operations, the baseband sampling frequency and the spectrum utilization rate of the intermediate frequency signal, and the like. For example: as can be seen from table 1, if the number of consecutive carriers is 2, that is, if 2 consecutive carriers are used at a set frequency utilization rate of 96%, the number of sub-carriers to be mapped is 23, the bandwidth of each guard band is 2KHZ, the number of points of inverse fast fourier transform operation is 64, and the baseband of the intermediate frequency signal has a frequency of 128 KSPS.
Similarly, for the IoT-G system, the corresponding resource handling control table can also be obtained in the above manner, as shown in table 2. In table 2, a resource processing control table suitable for the IOT-G scheme is shown, where in table 2, Nsb represents the number of continuous carriers, Assigned continuous bandwidth (KHz) represents the total bandwidth of the carriers, Nsc represents the number of subcarriers, guard band (KHz) represents the bandwidth of a single guard band, Nfft represents the number of inverse fast fourier transform operations of 64, fs (ksps) represents the baseband sampling frequency of the intermediate frequency signal, and spectrum utilization represents the spectrum utilization rate, and according to the resource processing control table, guard bands, the number of subcarriers, and other related information corresponding to a plurality of different numbers of continuous carriers can be recorded.
TABLE 2
It should be noted that, in the communication process between the base station and the terminal, since the adopted communication system is determined, according to the applicable communication system, a resource processing control table corresponding to the communication system is determined, and then the number of subcarriers and the guard band bandwidth corresponding to the number of continuous carriers are determined from the resource processing control table according to the number of continuous carriers allocated to the terminal.
Of course, the above is described by referring to the resource processing control table as an example, in practical applications, after the number of consecutive carriers is determined, the bandwidth of the guard band and the number of sub-carriers to be mapped may also be directly calculated through the flow shown in fig. 6.
S503: and mapping bandwidth resources formed by a plurality of continuous carriers into a first guard band, a second guard band and a target number of subcarriers between the first guard band and the second guard band, wherein the bandwidths of the first guard band and the second guard band are both target bandwidths.
According to step a1, the target number of subcarriers and the target bandwidth of the guard band may be determined, and then bandwidth resources formed by a plurality of consecutive carriers are mapped according to the target number of subcarriers and the target bandwidth of the guard band, so as to obtain a first guard band, a second guard band, and a target number of subcarriers between the first guard band and the second guard band.
S504: modulating a plurality of modulation symbols to be transmitted onto a plurality of continuous subcarriers, and constructing baseband frequency domain data based on the first guard band, the second guard band and the plurality of continuous subcarriers modulated with the plurality of modulation symbols.
This step can refer to the step S403, and is not described herein again.
S505: and determining the number of the FFT operation points corresponding to the number of the carriers of a plurality of continuous carriers, the FFT baseband sampling frequency and the order of the finite long single-bit impulse response FIR filter.
It is understood that the processing of the baseband frequency domain data includes: fast fourier transform, baseband sampling, and filtering. For this reason, corresponding setting parameters in each link need to be determined, wherein the setting parameters include: the number of FFT operation points, FFT baseband sampling frequency, and finite length single-bit impulse response FIR filter order, etc. need to determine the above setting parameters in order to process baseband frequency domain data.
S506: and carrying out fast Fourier transform and filtering processing on the baseband frequency domain data.
And performing fast Fourier transform and filtering processing on the baseband frequency data according to the number of the FFT operation points, the FFT baseband sampling frequency and the order of the FIR filter.
It should be noted that, the manners of determining the number of FFT operation points, FFT baseband sampling frequency, and finite long unit impulse response FIR filter orders corresponding to the number of carriers of a plurality of consecutive carriers may include two manners.
Firstly, the number of FFT operation points corresponding to the number of the carriers of a plurality of continuous carriers, the baseband sampling frequency of the FFT and the order of the FIR filter are determined from a resource processing control table. Wherein, the resource processing control table includes: the FFT operation point number, the FFT baseband sampling frequency and the FIR filter order number respectively correspond to a plurality of continuous carriers with different numbers. The FFT operation point number and the FFT baseband sampling frequency corresponding to each number of continuous carriers are determined based on the power wireless communication system supported by the terminal and the set frequency spectrum utilization rate, and the FFT operation point number, the baseband sampling frequency and the FIR filter order number required for resource mapping of the number of continuous carriers as a whole are determined.
It can be understood that the specific values of the parameters are recorded in the resource processing control table, and the specific values are corresponding to the number of consecutive carriers, such as the corresponding relationship between the number Nfft of the FFT in the LTE-G system and the number of consecutive carriers and the baseband sampling frequency Fs shown in table 1. Therefore, after the number of the continuous carriers is determined, corresponding setting parameters are obtained from the resource processing control table, and each link is set according to the corresponding setting parameters.
And secondly, calculating the operation point number of the Fast Fourier Transform (FFT), the baseband sampling frequency of the FFT and the order of the finite long unit impulse response (FIR) filter corresponding to the continuous carrier number in real time.
The calculation mode is the same whether the FFT operation point number is calculated in real time or the FFT operation point number in the resource processing control table is calculated. For example, the number of FFT operations is an integer satisfying the power N of 2, and the number of FFT operations is an integer greater than the number of subcarriers to which the continuous carrier needs to be mapped and closest to the number of subcarriers.
For example: the number of subcarriers is 36, then the smallest integer which is larger than 36 and also satisfies the power N of 2 is 64, thereby determining that the number of operation points of the fourier transform FFT is 64.
Correspondingly, the frequency adopted by the FFT baseband is calculated from the number of FFT operations and the bandwidth of a single subcarrier, that is, the frequency adopted by the FFT baseband is the number of FFT operations and the bandwidth of a single subcarrier. For example, by using LTE-G, when the number of FFT operations is 64 and the bandwidth of a single subcarrier is 2KHZ, the calculated frequency of the FFT baseband is 128 Ksps; the order of the FIR filter may be any one of the implementations, and is not particularly limited herein.
Specifically, after setting parameters such as the number of FFT operations, the baseband sampling frequency of FFT, and the order of FIR filter are determined, the setting parameters are set to corresponding links in the baseband frequency domain data processing flow.
To facilitate understanding of the solution of the present application, the following description is made in conjunction with a schematic diagram of a processing framework of the present application. Taking LTE-G as an example for explanation: referring to fig. 7, fig. 7 shows a specific process of processing baseband frequency domain data.
As can be seen from table 1, when the number of consecutive carriers is 1 to 5, the number of FFT operation points is 64, and a processing flow corresponding to the number of consecutive carriers is selected according to the number of consecutive carriers, and as shown in the figure, the number of FFT operation points and the baseband sampling frequency are different in different cases where the number of consecutive carriers is 15, the number of consecutive carriers is 6 to 10, the number of consecutive carriers is 11 to 20, and the number of consecutive carriers is 21 to 41. For example: and if the number of the continuous carriers is 5, selecting a processing flow of the continuous carriers 1-5 to process the continuous carriers. The above processing flows are similar to each other, and differ in the number of FFT operations, the FFT baseband sampling frequency, and the finite long-unit impulse response FIR filter order in each flow.
Correspondingly, after the number of consecutive carriers is determined, the processing may be performed according to the processing flow branch corresponding to the number of consecutive carriers in fig. 7, specifically:
the continuous carrier is input to the resource mapping module shown in fig. 7, and resource mapping is performed on the continuous carrier to obtain a guard band corresponding to the continuous carrier and a plurality of subcarriers. And modulating the modulation symbols onto the plurality of subcarriers through the resource mapping module to obtain baseband frequency domain data.
And then carrying out fast Fourier transform on the baseband frequency domain data so as to change the baseband frequency domain data into time domain data.
Finally, the time domain data is output to the cyclic prefix shown in fig. 7 to obtain the OFDM signal.
And then filtered by the finite long element impulse response filter shown in fig. 7 to obtain the filtered OFDM signal.
The OFDM signal is used as basic data for subsequent processes, and will not be described in detail here.
Fig. 7 is an example of a baseband frequency domain data processing procedure of the LTE-G system.
For the baseband frequency domain data processing procedure of IoT-G system, see fig. 8. Because the processing procedure is consistent with that of the baseband frequency domain data of the LTE-G system, the set parameter values may be different, for example: the number of operation points of the FFT, the baseband sampling frequency of the FFT, the order of the finite long single-bit impulse response FIR filter and the like.
Compared with the prior art, the resource mapping processing method of the power wireless private network can effectively reduce the calculation complexity ratio of a single carrier, namely, for the prior art, the calculation times of the method are fewer when the baseband data is processed.
The calculation complexity Ratio of the LTE-G system is shown as Ratio of calculating complexity shown in Table 3. In table 3, Nsb represents the number of consecutive carriers, Assigned continuous bandwidth (KHz) represents the total bandwidth of the carriers, filter order represents the order of the FIR filter, and Ratio of computing complexity represents the computational complexity Ratio.
TABLE 3
In addition to the LTE-G system, the present application also provides a correspondence between the computation complexity ratio of the IoT-G system and the number of consecutive carriers, see table 4.
In table 4, Nsb represents the number of consecutive carriers, Assigned continuous bandwidth (KHz) represents the total bandwidth of the carriers, filter order represents the order of the FIR filter, and Ratio of computing complexity represents the computational complexity Ratio.
TABLE 4
The present application provides a resource mapping processing apparatus based on a wireless private network of electric power, referring to fig. 9, the apparatus includes:
a first determining unit 901, configured to determine a plurality of consecutive carriers allocated to a terminal.
A bandwidth mapping unit 902, configured to map a bandwidth resource configured by a plurality of consecutive carriers to a first guard band, a second guard band, and a plurality of consecutive subcarriers between the first guard band and the second guard band.
According to the scheme, if the carrier allocated to the terminal is a plurality of continuous carriers, the continuous carriers are subjected to resource mapping as a whole, so that bandwidth resources of the continuous carriers are mapped into two guard bands located on two sides of the frequency band and a plurality of continuous subcarriers located between the two guard bands, and therefore, a guard band does not need to be configured for each carrier independently, the reduction of the bandwidth occupied by the guard bands is facilitated, the number and the total bandwidth of the subcarriers capable of bearing modulation symbols are increased, the waste of bandwidth resources is reduced, the spectrum utilization rate is improved, and the service data transmission rate is improved.
In one example, the apparatus further comprises:
the modulation unit is used for modulating a plurality of modulation symbols to be transmitted onto a plurality of continuous subcarriers and constructing baseband frequency domain data based on the first guard band, the second guard band and the plurality of continuous subcarriers modulated with the plurality of modulation symbols.
And the data processing unit is used for carrying out fast Fourier transform and filtering processing on the baseband frequency domain data.
In one example, the apparatus further comprises:
a second determining unit configured to determine a target bandwidth of a guard band and a target number of subcarriers required to resource map a plurality of contiguous carriers as a whole.
A bandwidth mapping unit, configured to, when mapping a bandwidth resource constituted by a plurality of consecutive carriers to a first guard band, a second guard band, and a plurality of consecutive subcarriers located between the first guard band and the second guard band:
and mapping bandwidth resources formed by a plurality of continuous carriers into a first guard band, a second guard band and a target number of subcarriers between the first guard band and the second guard band, wherein the bandwidths of the first guard band and the second guard band are both target bandwidths.
In one example, the second determining unit, when determining the target bandwidth of the guard band and the target number of subcarriers required for resource mapping of the plurality of continuous carriers as a whole, is specifically configured to:
determining the target bandwidth of the guard band and the target number of the subcarriers corresponding to the number of the carriers of the plurality of continuous carriers from a resource processing control table, wherein the resource processing control table comprises: the method comprises the steps that the bandwidth of a guard band and the number of subcarriers corresponding to multiple different numbers of continuous carriers respectively are determined, wherein the bandwidth of the guard band and the number of the subcarriers corresponding to each number of continuous carriers are determined based on the power wireless communication system supported by a terminal and the set spectrum utilization rate, and the bandwidth of the guard band and the number of the subcarriers are required for resource mapping of the number of continuous carriers as a whole.
The bandwidth of the guard band and the number of subcarriers required for resource mapping of each number of continuous carriers as a whole are obtained as follows:
and obtaining the total bandwidth of the carriers corresponding to the number of the continuous carriers based on the total number of the continuous carriers and the bandwidth of each carrier.
The product of the total bandwidth of the carriers and the spectrum utilization rate is taken as the effective bandwidth.
And rounding the quotient obtained by dividing the effective bandwidth by the bandwidth of a single subcarrier to obtain the number of the subcarriers.
And calculating the product of the number of the subcarriers and the bandwidth of a single subcarrier to obtain the total bandwidth of the subcarriers occupied by the subcarriers allocated in the total bandwidth of the subcarriers.
And dividing the difference value of the total bandwidth of the subcarriers subtracted by the total bandwidth of the carriers by 2 to obtain the bandwidth of each guard band.
In one example, the apparatus further comprises:
a third determining unit, configured to determine, before performing fast fourier transform and filtering on the baseband frequency domain data, a number of FFT operation points corresponding to the number of carriers of a plurality of consecutive carriers, a baseband sampling frequency of the FFT, and an order of a finite long single-bit impulse response FIR filter;
the data processing unit, when performing fast fourier transform and filtering processing on the baseband frequency domain data, is specifically configured to:
and performing fast Fourier transform and filtering processing on the baseband frequency domain data according to the number of the FFT operation points, the baseband sampling frequency of the FFT and the order of the FIR filter.
In one example, the third determining unit, when determining the number of FFT operation points, FFT baseband sampling frequency, and finite long unit impulse response FIR filter orders corresponding to the number of carriers of a plurality of consecutive carriers, is specifically configured to:
determining the number of FFT operation points, the FFT baseband sampling frequency and the FIR filter order corresponding to the number of the carriers of a plurality of continuous carriers from a resource processing control table, wherein the resource processing control table comprises: the method comprises the steps that the FFT operation point number, the FFT baseband sampling frequency and the FIR filter order number which correspond to various continuous carriers in different numbers respectively are determined, wherein the FFT operation point number and the FFT baseband sampling frequency which correspond to each continuous carrier in different numbers are the FFT operation point number, the baseband sampling frequency and the FIR filter order number which are required for carrying out resource mapping on the continuous carriers as a whole based on the power wireless communication system supported by a terminal and the set frequency spectrum utilization rate.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A resource mapping processing method based on a power wireless private network is characterized by comprising the following steps:
determining a plurality of contiguous carriers allocated to a terminal;
and mapping the bandwidth resources formed by the continuous carriers into a first guard band, a second guard band and a plurality of continuous sub-carriers between the first guard band and the second guard band.
2. The method of claim 1, further comprising:
modulating a plurality of modulation symbols to be transmitted onto the plurality of continuous subcarriers, and constructing baseband frequency domain data based on the first guard band, the second guard band and the plurality of continuous subcarriers modulated with the plurality of modulation symbols;
and carrying out fast Fourier transform and filtering processing on the baseband frequency domain data.
3. The method of claim 1 or 2, further comprising:
determining a target bandwidth of a guard band and a target number of subcarriers required for resource mapping of the plurality of continuous carriers as a whole;
the mapping the bandwidth resource formed by the multiple continuous carriers into a first guard band, a second guard band and multiple continuous subcarriers between the first guard band and the second guard band includes:
and mapping bandwidth resources formed by the continuous carriers into a first guard band, a second guard band and the target number of subcarriers between the first guard band and the second guard band, wherein the bandwidths of the first guard band and the second guard band are the target bandwidths.
4. The method of claim 3, wherein the determining the target bandwidth of the guard band and the target number of subcarriers required for resource mapping the plurality of contiguous carriers as a whole comprises:
determining a target bandwidth of a guard band and a target number of subcarriers corresponding to the number of carriers of the multiple continuous carriers from a resource processing control table, wherein the resource processing control table comprises: the method comprises the steps that the bandwidth of a guard band and the number of subcarriers corresponding to each of a plurality of different numbers of continuous carriers are determined, wherein the bandwidth of the guard band and the number of subcarriers corresponding to each number of continuous carriers are determined based on the power wireless communication system supported by the terminal and the set spectrum utilization rate, and the bandwidth of the guard band and the number of subcarriers are required for resource mapping of the number of continuous carriers as a whole.
5. The method of claim 2, further comprising, before the fast fourier transforming and filtering the baseband frequency domain data:
determining the number of Fast Fourier Transform (FFT) operation points corresponding to the number of the carriers of the plurality of continuous carriers, the baseband sampling frequency of the FFT and the order of the finite long unit impulse response (FIR) filter;
the fast fourier transform and filtering processing of the baseband frequency domain data includes:
and performing fast Fourier transform and filtering processing on the baseband frequency domain data according to the number of the FFT operation points, the baseband sampling frequency of the FFT and the order of the FIR filter.
6. The method of claim 5, wherein the determining the number of FFT operations, the FFT baseband sampling frequency, and the FIR filter order for the finite Long Unit impulse response (FIR) corresponding to the number of carriers of the plurality of consecutive carriers comprises:
determining the number of FFT operation points, the FFT baseband sampling frequency and the FIR filter order corresponding to the number of the carriers of the continuous carriers from a resource processing control table, wherein the resource processing control table comprises: the method comprises the steps that the FFT operation point number, the FFT baseband sampling frequency and the FIR filter order number which correspond to various continuous carriers in different numbers respectively are determined, wherein the FFT operation point number and the FFT baseband sampling frequency which correspond to each continuous carrier in different numbers are the FFT operation point number, the baseband sampling frequency and the FIR filter order number which are required for carrying out resource mapping on the continuous carriers as a whole and are determined based on the power wireless communication system supported by the terminal and the set frequency spectrum utilization rate.
7. A resource mapping processing device based on a wireless private network of electric power is characterized by comprising:
a first determination unit configured to determine a plurality of consecutive carriers allocated to a terminal;
a bandwidth mapping unit, configured to map a bandwidth resource formed by the multiple consecutive carriers into a first guard band, a second guard band, and multiple consecutive subcarriers located between the first guard band and the second guard band.
8. The apparatus of claim 7, further comprising:
the modulation unit is used for modulating a plurality of modulation symbols to be transmitted onto the plurality of continuous subcarriers and constructing baseband frequency domain data based on the first guard band, the second guard band and the plurality of continuous subcarriers modulated with the plurality of modulation symbols;
and the data processing unit is used for carrying out fast Fourier transform and filtering processing on the baseband frequency domain data.
9. The apparatus of claim 7 or 8, further comprising:
a second determining unit configured to determine a target bandwidth of a guard band and a target number of subcarriers required to perform resource mapping on the plurality of consecutive carriers as a whole;
the bandwidth mapping unit, when mapping bandwidth resources formed by the multiple continuous carriers to a first guard band, a second guard band, and multiple continuous subcarriers located between the first guard band and the second guard band, is specifically configured to:
and mapping bandwidth resources formed by the continuous carriers into a first guard band, a second guard band and the target number of subcarriers between the first guard band and the second guard band, wherein the bandwidths of the first guard band and the second guard band are the target bandwidths.
10. The apparatus according to claim 9, wherein the second determining unit, when determining the target bandwidth of the guard band and the target number of subcarriers required for resource mapping the plurality of contiguous carriers as a whole, is specifically configured to:
determining a target bandwidth of a guard band and a target number of subcarriers corresponding to the number of carriers of the multiple continuous carriers from a resource processing control table, wherein the resource processing control table comprises: the method comprises the steps that the bandwidth of a guard band and the number of subcarriers corresponding to each of a plurality of different numbers of continuous carriers are determined, wherein the bandwidth of the guard band and the number of subcarriers corresponding to each number of continuous carriers are determined based on the power wireless communication system supported by the terminal and the set spectrum utilization rate, and the bandwidth of the guard band and the number of subcarriers are required for resource mapping of the number of continuous carriers as a whole.
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