CN106911998B - Data transmitting and receiving method and device for base station and narrow-band user equipment - Google Patents

Data transmitting and receiving method and device for base station and narrow-band user equipment Download PDF

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CN106911998B
CN106911998B CN201510976886.8A CN201510976886A CN106911998B CN 106911998 B CN106911998 B CN 106911998B CN 201510976886 A CN201510976886 A CN 201510976886A CN 106911998 B CN106911998 B CN 106911998B
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data signal
user equipment
processing
time domain
base station
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CN106911998A (en
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汪勇刚
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Nokia Shanghai Bell Co Ltd
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Nokia Shanghai Bell Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The embodiment of the disclosure relates to a data transmitting and receiving method and device for a base station and a narrow-band user equipment. The data transmission method for the base station comprises the following steps: carrying out time domain-frequency domain transformation processing on a data signal to be sent to the narrow-band user equipment; and carrying out orthogonal frequency division multiplexing processing on the data signal subjected to the time domain-frequency domain conversion processing and the data signal to be sent to the broadband user equipment together for sending. According to the scheme of the embodiment of the disclosure, the narrowband user equipment side only needs to perform pure time domain narrowband processing, so that the narrowband user equipment is simplified, and the cost and the power consumption are reduced. In addition, the narrow-band and wide-band waveform aggregation is realized, so that the spectral efficiency of the whole system is improved. Due to the high requirements on cost and power consumption of machine type communication devices, the method and apparatus are better suited for machine-to-machine communication.

Description

Data transmitting and receiving method and device for base station and narrow-band user equipment
Technical Field
Embodiments of the present disclosure relate to the field of wireless communications, in particular to machine-to-machine (M2M) communications, and in particular to methods and apparatus for data transmission and reception for base stations and narrowband user equipment.
Background
With the rapid popularization of intelligent terminals and the explosive increase of network communication capacity, the evolution demand of the wireless communication technology facing the fifth generation (5G) is more clear and urgent. In the evolution of 5G-oriented wireless communication technologies, machine-to-machine (M2M) communication is considered a mandatory service to be supported.
With the development of the internet of things (IoT), communication between Machine Type Communication (MTC) devices such as smart sensors, smart meters and base stations (eNB, NodeB) is typically involved in IoT/M2M applications. For example, in one application scenario, the MTC devices may be haze sensors, which are located in various cities throughout the country to collect air quality information of the various cities. The haze sensors can measure corresponding air quality information at regular time and report the corresponding air quality information to the base station, and the base station can transmit the air quality information to a core network, such as a remote server of a national air quality monitoring center. In addition, the remote server may send instructions to the haze sensor through the base station, for example instructing it to change from one measurement every hour to one measurement every minute.
In such a case, not only communication between a broadband User Equipment (UE) with a higher data rate and a base station but also communication between an MTC device with a lower data rate and a base station is involved in wireless transmission. Herein, data transmission from the eNB to the MTC device or UE is referred to as downlink transmission, and data transmission from the MTC device or UE to the eNB is referred to as uplink transmission.
In general, an optimal transmission bandwidth can be allocated according to a data rate based on a trade-off relationship between an increased frequency diversity effect and a reduction in channel estimation accuracy. However, in 3GPP LTE existing air interface it is specified that uplink data transmission uses SC-FDMA scheme and downlink data transmission uses OFDMA scheme, where the transmission bandwidth is based on a single multi-carrier approach. In this case, for MTC devices having a lower data rate such as 2kbps to 10kbps, assuming that the channel bandwidth is 100MHz, the transmission bandwidth based on the single multi-carrier method cannot achieve the best spectrum efficiency for the MTC devices.
Furthermore, with further optimization and narrower bandwidth requirements, a 20% reduction in cost for 5G M2M over the low complexity MTC devices of 3GPP LTE R13 is expected. For such devices, narrowband processing may consume less power than broadband processing, which may provide maximum battery life for MTC devices.
Currently, LTE-M is a solution for low cost MTC deployment within conventional LTE carriers. The system supports a single 200kHz bandwidth operation. However, LTE-M is a stand-alone system that has no relation to LTE, and uses only LTE guard band spectrum.
Disclosure of Invention
From the above, it can be seen that the conventional design only involves one waveform, for example, CDMA or OFDM is selected in 3G or 4G to simplify the transceivers in the terminal and the base station. However, such a special waveform cannot meet different requirements of 5G, such as different requirements of MTC devices (narrowband user equipment) and UEs (broadband user equipment).
The disclosed embodiments propose the concept of a 5G air interface for integrating gigabit transmission for wideband user equipment and hundreds of bits transmission for narrowband user equipment. The air interface is not a single waveform but rather is intended to aggregate narrowband and wideband waveforms together.
It is an object of the embodiments of the present disclosure to provide a solution that can implement narrowband and wideband waveform aggregation to achieve an improvement in spectral efficiency and a reduction in cost for narrowband user equipment.
According to an embodiment of the present disclosure, there is provided a data transmission method for a base station, including: carrying out time domain-frequency domain transformation processing on a data signal to be sent to the narrow-band user equipment; and carrying out orthogonal frequency division multiplexing processing on the data signal subjected to the time domain-frequency domain conversion processing and the data signal to be sent to the broadband user equipment together for sending.
According to an embodiment of the present disclosure, there is provided a data receiving method for a narrowband user equipment, including: filtering the data signal from the base station; carrying out time domain equalization processing on the filtered data signal; and extracting a data signal from the base station from the time-domain equalized data signal in a time domain.
According to an embodiment of the present disclosure, there is provided a data transmission method for a narrowband user equipment, including: carrying out interpolation processing on a data signal to be sent to a base station; and performing filtering processing on the interpolated data signal to transmit.
According to an embodiment of the present disclosure, there is provided a data transmission apparatus for a base station, including: the time domain-frequency domain conversion module is used for carrying out time domain-frequency domain conversion processing on the data signal to be sent to the narrow-band user equipment; and the orthogonal frequency division multiplexing module is used for carrying out orthogonal frequency division multiplexing processing on the data signal subjected to the time domain-frequency domain transformation processing and the data signal to be sent to the broadband user equipment so as to be sent.
According to an embodiment of the present disclosure, there is provided a data receiving apparatus for a narrowband user equipment, including: the filtering module is used for filtering the data signal from the base station; the time domain equalization module is used for carrying out time domain equalization processing on the data signals subjected to filtering processing; and an extraction module, configured to extract, in a time domain, a data signal from the base station from the data signal subjected to the time domain equalization processing.
According to an embodiment of the present disclosure, there is provided a data transmission apparatus for a narrowband user equipment, including: the interpolation module is used for carrying out interpolation processing on the data signal to be sent to the base station; and the filtering module is used for filtering the data signal subjected to the interpolation processing so as to transmit the data signal.
According to the embodiment of the disclosure, during data transmission between a base station and a narrowband user equipment, only narrowband single carrier processing is performed on the narrowband user equipment side, time-frequency domain transformation preprocessing is performed on a narrowband single carrier signal of the narrowband user equipment on the base station side, then an OFDM processing procedure consistent with an LTE system is performed on the preprocessed narrowband single carrier signal of the narrowband user equipment and a wideband multi-carrier signal of the wideband user equipment, and further a narrowband and wideband waveform aggregation scheme is realized on evolution of an LTE path.
The narrowband user equipment side according to the embodiment of the disclosure only needs to perform pure time domain narrowband processing, so that the narrowband user equipment can be simplified, and the cost and the power consumption can be reduced. In addition, the narrow-band and wide-band waveform aggregation is realized, so that the spectral efficiency of the whole system is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
fig. 1 shows a signal flow diagram of a data transmission process for a base station according to an embodiment of the present disclosure;
fig. 2 shows a signal flow diagram of a data reception process for a narrowband user equipment according to an embodiment of the present disclosure;
fig. 3 shows a signal flow diagram of a data transmission process for a narrowband user equipment according to an embodiment of the present disclosure;
fig. 4 shows a spectral diagram of an OFDM signal aggregating narrowband and wideband waveforms according to an embodiment of the disclosure;
fig. 5 shows a schematic block diagram of a data transmission apparatus for a base station according to an embodiment of the present disclosure;
fig. 6 shows a schematic block diagram of a data receiving apparatus for a narrowband user equipment according to an embodiment of the present disclosure; and
fig. 7 shows a schematic block diagram of a data transmission apparatus for a narrowband user equipment according to an embodiment of the present disclosure.
Detailed Description
A basic idea of an embodiment of the present disclosure is to provide an air interface scheme for integrating waveform aggregation for gigabit transmission for wideband user equipment and for hundreds of bits transmission for narrowband user equipment, such that system spectral efficiency is improved and cost and power consumption of narrowband user equipment is reduced.
Specifically, from the perspective of the multi-site mode, the uplink is the SC-FDMA mechanism, the downlink for the UE is the OFDM mechanism, and the downlink for the narrowband user equipment is the SC-FDMA mechanism. Signals of narrowband user equipment in the downlink are transmitted over idle sub-carriers reserved in OFDM, which are separated by FDM from the multi-carrier sub-bands carrying wideband user equipment signals.
From the baseband processing point of view, only a time domain signal processing module exists in the narrowband user equipment, and a frequency domain signal processing module exists in the base station to inherit the legacy LTE system.
From a cost and power saving perspective, since the processing in the narrowband user equipment is purely time domain, there is no FFT and DFT in the CMOS chip, and thus the chip size would only be 25% with a frequency domain processing design. The reason is that without the FFT and DFT processes, a lot of memory and computational units in the chip would be saved. Thus, the immediate benefit is that such a scheme can maximally reduce the cost and power consumption of the narrowband user equipment.
Due to the high requirements of MTC devices on cost and power consumption, the method and apparatus according to embodiments of the present application are particularly suitable for M2M communication.
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the present disclosure will be further described in detail with reference to the accompanying drawings and specific embodiments.
Herein, a narrowband user equipment (narrowband UE) refers in a broad sense to a user communication equipment with a relatively low data rate. Narrowband user equipment in an M2M communication environment may generally refer to MTC devices such as smart sensors, smart meters, and the like. It should be understood that the embodiments of the present application are not limited to MTC devices, but are applicable to any narrowband user equipment with a relatively low data rate, which is currently known or developed in the future. Broadband user equipment (broadband UE) refers in a broad sense to user communication equipment with relatively high data rates, typically to user terminal equipment such as smartphones, portable terminals, etc. A base station refers to a network node such as an eNB, NodeB.
Fig. 1 shows a signal flow diagram of a data transmission procedure for a base station according to an embodiment of the present disclosure. Described therein is a framework of implementation of a transmitting end in downlink transmission, i.e., a transmission process of a narrowband signal for a narrowband UE and a wideband signal for a wideband UE on a base station side. In the base station, both narrowband signals and wideband signals are processed in the frequency domain. As an example, fig. 1 shows an example of data transmission of N (N2048) subbands in a 20MHz bandwidth. In addition, the base station may transmit data to any number of narrowband UEs and any number of wideband UEs simultaneously, and the figure is merely an example.
As shown in FIG. 1, a signal sequence a to be transmitted to a narrowband UE a0、a1、……、aM-1Is a narrow-band data signal processed by code modulation, a signal sequence b to be sent to a wide-band UE b0、……、biAnd a signal sequence c to be transmitted to the wideband UE c0、c1、……、cjAre wideband data signals that are processed by code modulation. Here, the coded modulation process may be implemented in any suitable manner in the art. Since the code modulation process is not related to the present invention, it is not described in detail here.
According to the embodiment of the application, a signal sequence a to be transmitted to a narrowband UE a0、a1、……、aM-1In the process of Orthogonal Frequency Division Multiplexing (OFDM)Before the processing, time domain-frequency domain transformation processing is performed in advance. According to an embodiment of the present application, the time-frequency domain transform process may include a Discrete Fourier Transform (DFT) process. Of course, the time-frequency domain transform process may also include any other known or future developed suitable process for implementing a time-frequency domain transform, such as a Fast Fourier Transform (FFT), or the like. This time-frequency domain transform process maps the data to be transmitted onto the allocated subbands. In this example, the signal sequence a is0、a1、……、aM-1Mapping onto M subbands respectively (M)<N)。
Then, for the narrowband data signal subjected to the time-frequency domain transform processing and the wideband data signal (b) to be transmitted to the wideband UE b and the wideband UE c0、……、biAnd c0、c1、……、cj) And performing OFDM processing. According to embodiments of the present application, the OFDM processing may include Inverse Fast Fourier Transform (IFFT) processing. Of course, the OFDM processing may also include any other known or future developed suitable processing to implement orthogonal frequency division multiplexing, such as Inverse Discrete Fourier Transform (IDFT), and the like. By this frequency division multiplexing process, the sub-band in which the signal to the narrowband UE a is located and the sub-band of the wideband multi-carrier in which the signal to the wideband UE b and the wideband UE c are located are independent of each other and do not interfere with other signals.
In fact, this processing of narrowband data signals to be sent to narrowband UEs in the downlink is similar to the process of DFT-S-OFDM in traditional uplink transmission. After DFT processing and IFFT processing, the signal to the narrowband UE has time domain single carrier characteristics, so that such a signal can be processed only in the time domain during reception on the narrowband UE side.
The transmission processing after the OFDM processing is similar to that in the conventional downlink transmission, such as insertion of a cyclic prefix, digital-to-analog conversion, up-conversion processing, and the like, and thus is not described herein again.
Fig. 2 shows a signal flow diagram of a data reception procedure for a narrowband UE according to an embodiment of the present disclosure. Described therein is the implementation framework of the receiving end in downlink transmission, i.e. the receiving processing of the narrowband data signal from the base station on the narrowband UE side. In a narrowband UE, only narrowband single-carrier processing needs to be performed on a baseband signal in the time domain.
As shown in fig. 2, the data signal from the base station is subjected to filtering processing, the filtered data signal is subjected to time domain equalization processing, and then the data signal from the base station is extracted from the time domain equalized data signal in the time domain. According to the embodiment of the present disclosure, the data signal subjected to the time domain equalization processing may be subjected to sampling processing to extract the data signal from the base station in the time domain.
According to the embodiment of the present disclosure, the data signal from the base station is transmitted by performing, by the base station, time-frequency domain transform processing on the data signal to be transmitted to the narrowband UE and performing orthogonal frequency division multiplexing processing on the data signal subjected to the time-frequency domain transform processing and the data signal to be transmitted to the wideband UE.
Compared with the processing of the receiving end of the conventional downlink, in the receiving of the narrowband UE according to the embodiment of the present disclosure, there is no FFT-IDFT processing, but there is narrowband filtering processing in the baseband signal chain; there is no frequency domain equalization process, but there is a time domain equalization process for propagation delay spread.
It should be understood that the processing prior to the filtering process is similar to that in conventional downlink reception, such as down-conversion processing, analog-to-digital conversion, CP removal, and the like. Also, the processing after the sampling processing is also similar to the processing in the conventional downlink reception, such as demodulation decoding and the like, and thus is not described in detail here.
The above describes the processing of the transmitting end and the receiving end in the downlink transmission by way of example, and the following describes the processing of the transmitting end and the receiving end in the uplink transmission accordingly.
Fig. 3 shows a signal flow diagram of a data transmission procedure for a narrowband UE according to an embodiment of the present disclosure. Also, the transmitting end (narrowband UE side) in uplink transmission only needs to perform narrowband single carrier processing on the baseband signal in the time domain.
As shown in fig. 3, the data signal to be transmitted to the base station is subjected to interpolation processing. According to an embodiment of the present disclosure, the data signal to be transmitted to the base station may be a data signal that is code modulated. Here, the coded modulation process may be similar to a conventional coded modulation process (as indicated by a dotted line block), which is not related to the point of the invention, and thus will not be described in detail here. According to an embodiment of the present disclosure, the interpolation process may make time domain points of one transmission block of the data signal 2048 by inserting zeros, which correspond to IFFT sampling points of a 20MHz bandwidth. According to an embodiment of the present disclosure, (N-M) zeros may be interpolated for time domain points of a transport block, which means that there are N/M spectral repetitions in the frequency domain.
Then, the interpolation-processed data signal is subjected to a filtering process to be transmitted. According to embodiments of the present disclosure, the bandwidth of the filter may be equal to the allocated bandwidth of the narrowband signal. According to the embodiment of the present disclosure, an appropriate guard band may be reserved between a narrowband signal and a wideband signal to reduce interference to the wideband signal.
It should be understood that the transmission processing after filtering is similar to the processing in the conventional uplink transmission, such as CP insertion, digital-to-analog conversion, up-conversion processing, etc., and will not be described herein again. Therefore, the sub-frequency band where the data signal to be transmitted to the base station is located can be allocated to any position in the whole system frequency band and is independent of other sub-frequency bands through frequency division multiplexing.
When the sub-band in which the narrowband data signal to be transmitted to the base station is located is allocated to an arbitrary position in the entire system band, the following may occur: the sub-bands are allocated to the sub-bands of the wideband multi-carrier where the wideband UE is to send wideband data signals to the base station. This causes interference to the wideband multi-carrier sub-band. Accordingly, filtering processing for OFDM signals needs to be added at the broadband UE side to avoid such interference. In view of this situation, the inventors propose a simpler and more efficient solution that can be implemented in baseband modulation, as described below.
According to the embodiment of the disclosure, the narrowband data signal to be sent to the base station can be subjected to coding modulation processing, so that the data signal is encoded and modulatedTime domain point alignment of one transport block to 2048/2k4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048 sample points, where k is any integer from 0 to 9. Thus, the frequency domain point of the narrowband data signal may be located in a zero (blank space) region of the OFDM signal of the wideband UE, as shown in fig. 4, the region where the vertical line is located is the zero region, two vertical lines represent the frequency domain point of the narrowband data signal, and the multicarrier signals on both sides are the OFDM signal of the wideband UE. Therefore, the filtering processing of the OFDM signal is not needed to reduce the interference of the side lobe on the broadband UE side.
Compared with the transmitting end in the traditional uplink transmission, the transmitting processing in the narrowband UE according to the embodiment of the disclosure does not include the frequency domain processing of DFT-IFFT, and can be transmitted only by performing interpolation and filtering processing on the time domain.
The above describes the processing of the transmitting end in uplink transmission. The processing at the receiving end in the uplink transmission, i.e. the receiving processing at the base station end, is the same as the receiving processing at the conventional base station end, and is irrelevant to the invention point of the present invention, so the description is omitted here.
So far, improvements of a data transmission method and a data reception method in uplink and downlink transmission according to an embodiment of the present disclosure have been described with reference to fig. 1 to 4. Correspondingly, the embodiment of the disclosure also provides a correspondingly improved data transmitting device and a correspondingly improved data receiving device.
Fig. 5 shows a schematic block diagram of a data transmission apparatus 500 for a base station according to an embodiment of the present disclosure. As shown in fig. 5, the data transmission apparatus 500 may include a time-frequency domain transform module 501 and an orthogonal frequency division multiplexing module 502.
According to the embodiment of the present disclosure, the time domain-frequency domain transformation module 501 may be configured to perform time domain-frequency domain transformation processing on a data signal to be sent to a narrowband UE. According to an embodiment of the present disclosure, the time-domain-frequency-domain transform module 501 may include a DFT processing module.
According to an embodiment of the present disclosure, the orthogonal frequency division multiplexing module 502 may be configured to perform Orthogonal Frequency Division Multiplexing (OFDM) processing on the data signal processed by the time-frequency domain transform together with a data signal to be transmitted to the wideband UE for transmission. According to an embodiment of the present disclosure, the orthogonal frequency division multiplexing module 502 may include an IFFT processing module.
According to an embodiment of the present disclosure, the apparatus 500 may further include a first code modulation module and a second code modulation module (both not shown). The first code modulation module is used for code modulation of a data signal to be sent to the narrow-band UE so as to perform time domain-frequency domain transformation processing on the data signal. The second code modulation module is used for code modulation of the data signal to be sent to the broadband UE so as to perform orthogonal frequency division multiplexing processing.
Fig. 6 shows a schematic block diagram of a data receiving apparatus 600 for a narrowband UE according to an embodiment of the present disclosure. The apparatus 600 may include a filtering module 601, a time domain equalization module 602, and an extraction module 603.
According to an embodiment of the present disclosure, the filtering module 601 may be configured to perform filtering processing on a received data signal from a base station. The time domain equalization module 602 may be configured to perform a time domain equalization process on the filtered data signal. The extraction module 603 may be configured to extract the data signal from the base station from the data signal after the time domain equalization processing in the time domain. According to an embodiment of the present disclosure, the extraction module 603 may comprise a sampling module.
Fig. 7 shows a schematic block diagram of a data transmission apparatus 700 for a narrowband UE according to an embodiment of the present disclosure. The apparatus 700 may include an interpolation module 701 and a filtering module 702.
According to an embodiment of the present disclosure, the interpolation module 701 may be configured to perform interpolation processing on a data signal to be transmitted to a base station. The filtering module 702 may be configured to filter the interpolated data signal for transmission.
According to an embodiment of the present disclosure, the interpolation module 701 may make 2048 time domain points of one transmission block of the data signal by inserting zeros.
The apparatus 700 may further include a code modulation module (not shown) for code modulating a data signal to be transmitted to the base station according to an embodiment of the present disclosure. According to the embodiment of the present disclosureThe code modulation is performed such that the time domain point of one transport block of the data signal is aligned 2048/2kAnd k is any integer from 0 to 9.
The data transmitting apparatus and the data receiving apparatus described above correspond to the processes of the data transmitting method and the data receiving method described above, and therefore, for specific details thereof, reference may be made to the processes of the data transmitting method and the data receiving method described above, and details thereof are not described herein again.
It can be seen that through the improvement of the above scheme, the transceiver at the narrowband UE side can have a pure time domain narrowband processing module, such as a narrowband filter, a time domain equalizer, etc. Thus, the simple time domain narrowband processing can make the narrowband UE simpler, and lower in cost and power consumption. In addition, the waveform aggregation of the narrow-band signal and the wide-band signal is realized at the base station side, and the spectrum efficiency of the whole system is improved.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus or computer program product. Accordingly, embodiments of the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory. The memory may include forms of volatile memory, Random Access Memory (RAM), and/or non-volatile memory in a computer-readable medium, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. Computer readable media, as defined herein, does not include transitory computer readable media, such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present disclosure and is not intended to limit the present disclosure. Various modifications and variations of this disclosure will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure should be included in the scope of the claims of the present disclosure.

Claims (18)

1. A data transmission method for a base station, comprising:
carrying out time domain-frequency domain transformation processing on a data signal to be sent to the narrow-band user equipment; and
and carrying out orthogonal frequency division multiplexing processing on the data signal subjected to the time domain-frequency domain conversion processing and the data signal to be sent to the broadband user equipment so as to send the data signal.
2. The method of claim 1, wherein the time-frequency domain transform process comprises a discrete fourier transform process.
3. The method of claim 1, wherein the orthogonal frequency division multiplexing process comprises an inverse fast fourier transform process.
4. The method of claim 1, further comprising:
and carrying out coding modulation on the data signal to be sent to the narrow-band user equipment so as to carry out time domain-frequency domain transformation processing on the data signal.
5. The method of claim 1, further comprising:
and carrying out coding modulation on the data signal to be sent to the broadband user equipment so as to carry out orthogonal frequency division multiplexing processing.
6. The method of claim 1, wherein the narrowband user equipment is a machine type communication device.
7. A data receiving method for a narrowband user equipment, comprising:
receiving a data signal from a base station, wherein the data signal is subjected to time domain-frequency domain transformation processing in the base station and then subjected to orthogonal frequency division multiplexing processing together with the data signal to be sent to broadband user equipment;
filtering the data signal;
carrying out time domain equalization processing on the filtered data signal; and
extracting a data signal from the base station from the time-domain equalized data signal in a time domain.
8. The method of claim 7, wherein extracting a data signal from the base station in the time domain from the time domain equalized data signal comprises:
the data signal subjected to the time domain equalization processing is subjected to sampling processing to extract the data signal from the base station in the time domain.
9. The method of claim 7, wherein the narrowband user equipment is a machine type communication device.
10. A data transmission apparatus for a base station, comprising:
the time domain-frequency domain conversion module is used for carrying out time domain-frequency domain conversion processing on the data signal to be sent to the narrow-band user equipment; and
and the orthogonal frequency division multiplexing module is used for carrying out orthogonal frequency division multiplexing processing on the data signal subjected to the time domain-frequency domain conversion processing and the data signal to be sent to the broadband user equipment so as to send the data signal.
11. The device of claim 10, wherein the time-frequency domain transform process comprises a discrete fourier transform process.
12. The apparatus of claim 10, wherein the orthogonal frequency division multiplexing process comprises an inverse fast fourier transform process.
13. The apparatus of claim 10, further comprising:
and the first code modulation module is used for code modulating the data signal to be sent to the narrowband user equipment so as to perform time domain-frequency domain transformation processing on the data signal to be sent to the narrowband user equipment.
14. The apparatus of claim 10, further comprising:
and the second code modulation module is used for code modulating the data signal to be sent to the broadband user equipment so as to perform orthogonal frequency division multiplexing processing.
15. The apparatus of claim 10, wherein the narrowband user equipment is a machine type communication device.
16. A data receiving apparatus for a narrowband user equipment, comprising:
a receiving module, configured to receive a data signal from a base station, where the data signal is subjected to time-frequency domain transform processing in the base station, and then subjected to orthogonal frequency division multiplexing processing together with a data signal to be sent to a broadband user equipment;
the filtering module is used for filtering the data signal;
the time domain equalization module is used for carrying out time domain equalization processing on the data signals subjected to filtering processing; and
and the extraction module is used for extracting the data signal from the base station from the data signal which is subjected to the time domain equalization processing on the time domain.
17. The apparatus of claim 16, wherein the extraction module comprises:
and the sampling module is used for sampling the data signal subjected to the time domain equalization processing so as to extract the data signal from the base station in the time domain.
18. The apparatus of claim 16, wherein the narrowband user equipment is a machine type communication device.
CN201510976886.8A 2015-12-23 2015-12-23 Data transmitting and receiving method and device for base station and narrow-band user equipment Active CN106911998B (en)

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