WO2011143896A1 - 业务数据传输方法、接收机、移动终端、发射机以及基站 - Google Patents

业务数据传输方法、接收机、移动终端、发射机以及基站 Download PDF

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Publication number
WO2011143896A1
WO2011143896A1 PCT/CN2010/077849 CN2010077849W WO2011143896A1 WO 2011143896 A1 WO2011143896 A1 WO 2011143896A1 CN 2010077849 W CN2010077849 W CN 2010077849W WO 2011143896 A1 WO2011143896 A1 WO 2011143896A1
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Prior art keywords
module
receiver
mode
mobile terminal
service data
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PCT/CN2010/077849
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English (en)
French (fr)
Inventor
龚明
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ZTE Corp
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ZTE Corp
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Priority to EP10851653.5A priority Critical patent/EP2573973B1/en
Priority to JP2013510478A priority patent/JP5830528B2/ja
Priority to US13/259,940 priority patent/US8923192B2/en
Priority to KR1020127010697A priority patent/KR101561156B1/ko
Publication of WO2011143896A1 publication Critical patent/WO2011143896A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094Indication of how sub-channels of the path are allocated
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/02Channels characterised by the type of signal
    • H04L5/06Channels characterised by the type of signal the signals being represented by different frequencies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/0003Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0028Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
    • H04B1/0035Channel filtering, i.e. selecting a frequency channel within a software radio system
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2626Arrangements specific to the transmitter only
    • H04L27/2646Arrangements specific to the transmitter only using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0042Intra-user or intra-terminal allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0096Indication of changes in allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0212Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower
    • H04W52/0216Power saving arrangements in terminal devices managed by the network, e.g. network or access point is leader and terminal is follower using a pre-established activity schedule, e.g. traffic indication frame
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver only
    • H04L27/2649Demodulators
    • H04L27/265Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications, and in particular to a service data transmission method, a receiver, a mobile terminal, a transmitter, and a base station.
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDMA Orthogonal Frequency Division Multiplexing
  • multiple mobile terminals can multiplex spectrum resources at a subdivided subcarrier resource level, for example, a long term evolution system ( The downlink of Long-Term Evolution, LTE) uses such OFDMA technology.
  • Figure 1 shows a block diagram of a broadband wireless OFDMA base station transmitter.
  • the data of each user is code modulated, and the base station maps the signals in the wideband frequency band through multi-user scheduling.
  • the wideband spectrum can form N parallel subcarrier bearer data, for example, N is 2048, and the base station can optimize scheduling of each user on the N subcarriers.
  • the general base station obtains the wireless channel from the base station to a certain user (ie, mobile terminal) through the channel quality feedback of the mobile terminal or the reciprocity of the uplink and downlink channels of the Time Division Duplex (TDD).
  • TDD Time Division Duplex
  • the base station can allocate 4 sub-carriers suitable for user reception (less fading) to the user, so as to achieve the purpose of improving user throughput.
  • the base station may allocate consecutive subcarriers to the user, or may assign non-contiguous subcarriers to the user.
  • Figure 2 shows an example of subcarrier allocation within a frequency band.
  • a part of the frequency domain subcarriers are used as a reference training signal, the transmission is to determine the known signal, and the other part of the frequency domain subcarrier is used to carry the service data to be transmitted.
  • the reference signal subcarriers can help the receiver perform channel estimation, thereby completing the phase demodulation of the data.
  • some subcarriers carry related control channel information, and the base station uses the relevant control channel to notify the user of the scheduling information and the parameters of each service channel (such as the coding rate, modulation mode, etc.).
  • there are some common control channels such as synchronization signals, broadcast channels, etc.
  • a certain number of frequency domain subcarrier resources are also occupied, and the non-overlapping mappings with the subcarriers of other channels are in the system frequency band.
  • the Inverse Fast Fourier Transform IFFT
  • IFFT Inverse Fast Fourier Transform
  • each mobile terminal receives a downlink signal, and a block diagram of a receiver of the mobile terminal is shown in FIG.
  • the air interface signal is RF-transformed to the baseband by the RF module and is converted into a baseband signal by the analog-to-digital conversion module ADC.
  • the cyclic prefix is removed in the time domain, and then the Fourier FFT transform is performed on the time domain OFDM symbol to obtain the data in the frequency domain.
  • each mobile terminal takes out its own subcarrier and associated reference subcarrier signals.
  • the broadband system has a special control channel or control signaling for notifying each user base station of the location of the time-frequency resources allocated to it.
  • the signal estimation module estimates the frequency domain subcarrier channel from the base station to the user by using the reference subcarrier signal; the demodulation module performs phase kilodemodulation on the data subcarrier signal according to the channel estimation value, to obtain a corresponding data bit decision value. , sent to the decoding module for decoding, and finally get the data information.
  • RF module RF analog-to-digital conversion module ADC, Fourier transform module FFT and other modules all work in high data rate mode, and users will receive with larger power consumption. However, users do not have high-speed data services in many cases.
  • a primary object of the present invention is to provide a service data transmission method, a receiver, a mobile terminal, a transmitter, and a base station to solve the above problems.
  • a service data transmission method including: receiving, by a receiver of a mobile terminal, a control signal sent by a base station, where the control signal is used to indicate multiple subcarriers allocated for the mobile terminal, and multiple subcarriers are used. to transmit traffic data; determining a plurality of subcarriers and the difference between the highest frequency FREm ⁇ 's most FRE Low frequency exceeds the threshold value THB; if not exceeded, the receiver receives traffic data preclude a narrowband mode, otherwise preclude the use of wideband The mode receives business data.
  • a receiver which is provided on a mobile terminal, and includes: a radio frequency module and a receiver control module, where the radio frequency module is configured to receive a control signal sent by a base station accessed by the mobile terminal, and Outputting to the receiver control module, and for receiving subsequent service data from the base station, wherein the control signal is used to indicate multiple subcarriers allocated for the mobile terminal, and multiple subcarriers are used for transmitting service data; It is judged whether the difference between the highest frequency FREm ⁇ and the lowest frequency FRE LOW among the plurality of subcarriers exceeds the threshold TH B . If not, the service data is received in the narrowband mode, otherwise, the broadband data is received in the broadband mode.
  • a mobile terminal including the above receiver.
  • a transmitter including: an encoding module, a debugging module, a mapping and multiplexing module, an inverse Fourier transform module, a digital-to-analog conversion module, a radio frequency module, and a scheduling module, where the scheduling module includes a mode determining sub-module, configured to determine whether a current service of the mobile terminal accessing the base station is a non-high-speed transmission service, and if yes, triggering the configuration sub-module to configure a frequency resource corresponding to the narrowband mode for the mobile terminal; Allocating a plurality of subcarriers for the mobile terminal, generating a control signal indicating the plurality of subcarriers, and controlling the radio frequency module to send a control signal to the mobile terminal, where the multiple subcarriers are used for service data transmission, and the highest frequency of the plurality of subcarriers is FRE Hlgh With the most
  • a base station including the above transmitter.
  • the base station can configure the user in a low-bandwidth narrowband receiving mode, and the base station allocates a narrowband resource to the user to carry its service data, and notifies the user of the scheduling information by using the information of the specific time-frequency location;
  • the machine can adaptively shift the center spectrum and filter out the narrowband signal to achieve narrowband reception, thereby narrowing the signal bandwidth processed by the receiver, lowering the digital sampling rate, reducing the calculation amount of the FFT module and related storage, thereby achieving Reduce the power consumption of mobile terminals.
  • FIG. 1 is a block diagram showing a structure of a broadband wireless OFDMA base station transmitter according to the related art
  • FIG. 2 is a schematic diagram of a full-band band subcarrier allocation according to the related art
  • FIG. 3 is a block diagram showing a structure of a receiver of a mobile terminal according to the related art
  • 4 is a structural block diagram of a transmitter according to Embodiment 1 of the present invention
  • FIG. 5 is a schematic diagram of spectrum allocation of a narrowband bandwidth according to Embodiment 1 of the present invention
  • FIG. 6 is a schematic structural diagram of a receiver according to Embodiment 2 of the present invention
  • FIG. 8 is a flowchart of a service data transmission method according to Embodiment 3 of the present invention
  • FIG. 9 is a flowchart of receiving service data in a narrowband mode according to Embodiment 3 of the present invention
  • FIG. 10 is a schematic diagram of spectrum allocation of a full frequency bandwidth according to Embodiment 4 of the present invention
  • FIG. 11 is a timing resource scheduling diagram according to Embodiment 4 of the present invention.
  • Embodiment 1 a transmitter is provided. Unlike the prior art, as shown in FIG. 4, the scheduling module of the transmitter includes: a mode determining submodule 400, and a configuration submodule 402.
  • the mode determining sub-module 400 is configured to determine whether the current service of the mobile terminal accessing the base station is a non-high-speed transmission service, and if yes, the trigger configuration sub-module 402 configures the frequency resource corresponding to the narrowband mode for the mobile terminal, otherwise, determining The mobile terminal receives the service data by using the broadband mode; the configuration submodule 402 is configured to allocate, by the mobile terminal, multiple subcarriers for service data transmission, generate a control signal indicating multiple subcarriers, and control the radio frequency module to send a control signal to the mobile terminal. , wherein the difference between the highest frequency of the best FREm ⁇ Di FRE Low frequencies of the plurality of sub-carriers does not exceed the threshold value
  • the existing base station transmitter can only configure the broadband frequency resource for the mobile terminal, that is, in the entire frequency band, regardless of whether the current mobile terminal is in a high rate service or a low rate service.
  • the broadband frequency resource has been allocated to the mobile terminal, so that the RF, ADC, and FFT modules of the existing mobile terminal receiver have to work in a high data rate mode to receive service data with a large power.
  • the transmitter provided in this embodiment implements the mode judging function and the frequency domain resource configuration function by setting the two sub-modules.
  • the transmitter For the mobile terminal that does not need to transmit the service data at high speed, the transmitter is It allocates narrowband frequency resources, so that the receiver of the mobile terminal can adjust the RF, ADC and FFT modules to low-power receiving service data, reducing power consumption.
  • the sub-module 400 is determined by the foregoing mode, and the service type of the mobile terminal currently accessing the base station is determined. If the service type of the mobile terminal requires a very high transmission speed, such as a real-time video service or a high-speed file download service, The mode determining sub-module 400 determines that the mobile terminal needs to receive the service data in the broadband mode and allocate the broadband band resource thereto.
  • the mode determining sub-module 400 determines that the mobile terminal uses the narrowband mode.
  • the trigger configuration sub-module 402 allocates a narrowband frequency resource to the mobile terminal.
  • one frequency resource block (RB) is formed by 12 subcarriers, the frequency allocation is based on the frequency resource block, and the 1200 data subcarriers in the 20 MHz bandwidth are 100 RBs.
  • the frequency component allocated by the configuration sub-module 402 is a narrow band including multiple subcarriers, and FIG. 5 shows a
  • the narrowband of voice service allocation for a mobile terminal is: RBs with serial numbers 80, 81, and 83 (numbers from 0 to 1, 0, 1, ..., 99 from low frequency to high frequency).
  • the radio frequency module transmits the control signal in a wideband mode or a narrowband mode.
  • the transmission of the control signal may be selected to be transmitted in the broadband mode or the narrowband mode.
  • the transmitter of the base station maps the control signal to any RB in the entire frequency band, if the narrowband is used.
  • the transmitter of the base station uses the above-mentioned frequency resource allocation mode, and after scheduling coordination, the control signal is mapped to the designated RB of the frequency band for transmission.
  • the control signal is transmitted in the narrowband mode, so that the receiver of the mobile terminal can adjust the modules of RF, ADC and FFT to the low power receiving control signal, so that the mobile terminal is in the low power receiving state for as long as possible, thereby further reducing the The power consumption of the mobile terminal.
  • the scheduling module further includes: a sending control submodule 404, configured to control the radio frequency module at J.
  • the base station and the mobile terminal may, but are not limited to, negotiate the foregoing mode to determine the time slot, the control signal, and the transmission time slot and the transmission period of the service data, so that the mobile terminal can adjust the receiving mode in time and effectively.
  • the ground is in a low power state.
  • a base station is further provided, which further includes any one of the foregoing transmitters provided in this embodiment, in addition to the functions of the existing base station, to implement a mode determination function and a frequency domain resource configuration function.
  • the above-mentioned base station allocates narrowband frequency resources thereto, so that the mobile terminal can adjust modules such as RF, ADC, and FFT to low-power receiving service data, thereby reducing power consumption.
  • a receiver is provided. As shown in FIG.
  • the receiver includes: a radio frequency module (RF) 60, a receiver control module 61, where the radio frequency module 60 is configured to receive from a control signal of the base station accessed by the mobile terminal, and output to the receiver control module 61, and for receiving subsequent service data from the base station, wherein the control signal is used to indicate multiple sub-carriers for the service data transmission allocated for the mobile terminal carrier; receiver control module 61, configured to determine the maximum frequency of a plurality of subcarriers FREm ⁇ s and most FRE Low frequency difference exceeds the threshold value THB, if not exceeded, Bian receives traffic data with a narrowband mode, otherwise, ⁇ Receive business data in broadband mode.
  • RF radio frequency module
  • the receiver of the existing mobile terminal needs to set the operating parameters of the RF, ADC, FFT and other modules according to the system bandwidth of the cell, and works in a high data rate mode. Large power receives business data.
  • the receiver provided in this embodiment implements the functions of determining the frequency resource and determining the receiving mode through the receiver control module 61.
  • the receiver will receive the service data that does not need to be transmitted at a high speed.
  • the mode is set to the narrowband reception mode, so that the receiver of the mobile terminal can adjust the RF, ADC, and FFT modules to low-power receiving service data, reducing power consumption.
  • the receiver provided in this embodiment may further include: a low pass filter module (LPF) 62, an analog to digital conversion module (ADC) 63, a Fourier transform module (FFT) 64, and a power consumption.
  • the Fourier transform module connection 64 is configured to configure the operating parameters in the narrowband working mode for the radio frequency module 60, the low pass filter module 62, the analog to digital conversion module 63, and the Fourier transform module 64 under the control of the receiver control module 61, respectively.
  • the RF module 60, the low pass filter module 62, the analog to digital conversion module 63, and the Fourier transform module 64 can perform low power service data reception and processing after being configured as operating parameters of the narrowband operation mode, and the remaining modules are in the existing receiver.
  • the corresponding modules have the same function.
  • the low power control module 65 in the receiver to respond to the narrowband receive mode requirements of the receiver control module 61, the narrowband is configured for the radio frequency module 60, the low pass filter module 62, the analog to digital conversion module 63, and the Fourier transform module 64.
  • the low-power operating parameters in the mode enable the receiver to adapt to various signal bandwidths. For low-rate services, such as voice services and text browsing, the receiver in the power working state can effectively save the mobile terminal. Battery consumption, extending battery life.
  • the following operating parameters are generally configured for the radio frequency module 60, the low pass filter module 62, the analog to digital conversion module 63, and the Fourier transform module 64:
  • the receiver control module 61 or the low power control module 65 can be configured to perform the operation in the narrowband mode for the radio frequency module 60, the low pass filter module 62, the analog to digital conversion module 63, and the Fourier transform module 64 in the following manner. Parameters:
  • the receiver of the mobile terminal can adjust the RF, ADC, and FFT modules to the low-power receiving service data, thereby implementing the narrow-band mode receiving service data of the low-rate service, and reducing the power consumption of the mobile terminal.
  • the radio frequency module 60 can receive the control signal in a wideband mode or a narrowband mode.
  • the control signal can also be received in the narrowband mode, that is, the receiver of the mobile terminal passes the previously received control signal.
  • the control signal can also be received in the narrowband mode, that is, the receiver of the mobile terminal passes the previously received control signal.
  • the base station transmitter the frequency resource allocated for the control signal, mapping the control signal to a certain frequency band of the entire frequency band, and the receiver configuring the radio frequency module 60, the low pass filter module 62, and the analog to digital conversion according to the frequency resource characteristics
  • the operating parameters of the module 63 and the Fourier transform module 64 adaptively adjust the power consumption of the receiver to minimize the power consumption of the mobile terminal by minimizing the receiver in a low power consumption state.
  • the radio frequency module 60 receives the control signal in the Jo + w*J time slot, and receives the service data in the time slot of Jo + w*J + l to r 0 + ( « + l) * J, where ⁇ .
  • n 0
  • J 0
  • the base station and the mobile terminal may, but are not limited to, negotiate the foregoing mode to determine the time slot, the control signal, and the transmission time slot and the transmission period of the service data, so that the mobile terminal can adjust the receiving mode in time and effectively.
  • the ground is in a low power state.
  • a mobile terminal is further provided, where the mobile terminal has an existing mobile terminal.
  • the receiver of any one of the foregoing provides the frequency resource determining function, the receiving mode selecting function, and the receiver operating parameter configuration function. If the current mobile terminal determines that high-speed transmission of service data is not required, The mobile terminal sets the receiving mode to the narrowband mode and configures the operating parameters of each module in the narrowband mode, so that the mobile terminal can adjust the RF, ADC, and FFT modules to low-power receiving service data, thereby reducing power consumption as much as possible.
  • Embodiment 3 In this embodiment, a service data transmission method is provided to implement the functions of the base station transmitter and the mobile terminal receiver in the first embodiment and the second embodiment, and FIG. 8 is a service according to the third embodiment of the present invention.
  • the flowchart of the data transmission method includes: Step S802: The receiver of the mobile terminal receives the control signal from the base station, where the control signal is used to indicate a plurality of subcarriers allocated for the service data transmission for the mobile terminal; Step S804; The highest frequency FRE HLGH and the last frequency FREL among the plurality of subcarriers are determined. Whether the difference of W exceeds the threshold value Hs, if yes, step S 806 is performed, otherwise, step S 808 is performed; step S806, the receiver receives the service data in the broadband mode; step S808, the receiver receives the service in the narrowband mode data.
  • the existing service data transmission method whether the current service is in a low rate service or a high rate service, the receiver of the mobile terminal needs to set the working parameters of the RF, ADC, FFT and other modules according to the system bandwidth of the cell, and can only work in the In the high data rate mode, the service data is received at a relatively large power.
  • the service data transmission method provided by this embodiment determines the frequency resource and the function of determining the receiving mode by the receiver. For the service data that does not need to be transmitted at a high speed, the receiver sets the receiving mode to the narrowband receiving mode. Therefore, the receiver of the mobile terminal can adjust the modules such as RF, ADC, and FFT to the low-power receiving service data, thereby reducing the power consumption of the mobile terminal.
  • the receiving, by the receiver, the service data in the narrowband mode includes: Step S902, respectively configuring the working parameters of the radio module, the low-pass filter module, the analog-to-digital conversion module, and the Fourier transform module of the receiver, where The working parameter corresponds to the narrowband mode; in the implementation process, after the receiver determines to receive the service data by using the narrowband receiving mode, the RF module, the low-pass filter module, the analog-to-digital conversion module, and the Fourier transform module are configured in the narrowband mode.
  • the low-power operating parameters enable the receiver to adapt to various signal bandwidths. For low-rate services, such as voice services and text browsing, the receiver in the power working state can effectively save the battery consumption of the mobile terminal.
  • Step S904 receiving service data by using the configured radio frequency module, the low pass filter module, the analog to digital conversion module, and the Fourier transform module.
  • the RF module of the receiver receives the signal, downconverts and performs low-pass filtering through the low-pass filter module, and then passes through the analog-to-digital conversion module and sends it to the Fourier transform module processing module to obtain After the frequency domain data, normal channel estimation based on time-frequency domain interpolation filtering is performed, and then demodulated and decoded.
  • the service data in the narrowband mode is completed.
  • the following operating parameters are generally configured for the RF module, the low-pass filter module, the analog-to-digital conversion module, and the Fourier transform module in the broadband mode:
  • the receiver can configure the operating parameters in the narrowband mode for the radio frequency module, the low pass filter module, the analog to digital conversion module, and the Fourier transform module 6 by:
  • the receiver of the mobile terminal can adjust the RF, ADC, and FFT modules to the low-power receiving service data, thereby implementing the narrow-band mode receiving service data of the low-rate service, and reducing the power consumption of the mobile terminal.
  • the receiver can receive the control signal in a wideband mode or a narrowband mode.
  • the control signal can also be received in the narrowband mode, that is, the receiver of the mobile terminal passes the previously received control signal.
  • the radio frequency module is at J. + w *J time slot receives control signal, at J. + w *J + l to r 0 + ( « + l) *J receive service data in the time slot, where ⁇ .
  • n 0, J ⁇ 0.
  • the base station and the mobile terminal may, but are not limited to, negotiate the foregoing mode to determine the time slot, the control signal, and the transmission time slot and the transmission period of the service data, so that the mobile terminal can adjust the receiving mode in time and effectively.
  • the ground is in a low power state.
  • Transform 1200 frequency domain subcarriers with DC as the center in the frequency domain (without DC subcarriers), subcarrier spacing is 15 kHz, and full frequency bandwidth allocation is shown in Figure 10.
  • the base station assigns a narrowband frequency i or resource block RB numbers to 80, 81, and 83 for a voice service user (the number ⁇ frequency to the high frequency is 0, 1 , . .. , 99).
  • the base station can schedule the user again and send the relevant control channel information.
  • the user receives the control channel information in the wideband mode.
  • the control module of the receiver is set to the following parameters for RF, LPF, ADC, FFT and other modules:
  • the signal passes through the RF, LPF, and ADC samples, and then the frequency domain data is obtained through the FFT module. All the data of the RBs of the original spectrum of 80, 81, and 83 are received and received without any omission. Machine.
  • the demapping module correspondingly separates the reference signal for channel estimation and the subcarrier signal carrying data.
  • the subsequent channel estimation module performs channel estimation by using a conventional frequency domain time domain interpolation filtering method. In order to improve the performance of channel estimation, it is possible to consider receiving signals of more RB resource blocks adjacent to the useful bandwidth, so that more frequency domains can be utilized. For the reference signal, the bandwidth of the received processed signal can be adjusted by appropriately increasing the r value and setting the M value.
  • the processed signal bandwidth can be increased to 1.25MHz, corresponding to 10 RB resource blocks, which can provide more reference signal subcarriers, thereby improving channel estimation accuracy.
  • the demodulation module demodulates the data on the data subcarriers and sends them to the decoder for decoding, thus completing the reception of the data in the narrowband.
  • the narrowband receiver completes the data reception, but the processing complexity of the pre-processing module is greatly reduced compared to the full-bandwidth receiver, which is only about 1/32 of the full-bandwidth receiver! This will greatly reduce the power consumption of the receiver and extend the working life of the battery of the mobile terminal device.
  • the receiver is adaptively controlled.
  • the user's service is a narrowband low-speed service
  • the base station will let the receiver The quality of the downlink channel is evaluated irregularly or periodically, and at these times, the user receiver can select the full bandwidth reception mode.
  • the base station can configure the user in a low-bandwidth narrowband receiving mode, and the base station allocates a narrowband resource to the user to carry its service data, and notifies the user of the scheduling by using the information of the specific time-frequency location.
  • the receiver of the mobile terminal can adaptively shift the center spectrum and filter out the narrowband signal to achieve narrowband reception, thereby narrowing the signal bandwidth processed by the receiver, reducing the digital sample rate, calculating the FFT module and correlating The storage is reduced, thereby achieving the effect of the power consumption of the mobile phone of the mobile phone.
  • the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.

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Description

业务数据传输方法、 接收机、 移动终端、 发射机以及基站 技术领域 本发明涉及通信领域, 具体而言, 涉及一种业务数据传输方法、 接收机、 移动终端、 发射机以及基站。 背景技术 随着移动通信用户需求增长, 高频谱效率正成为移动通信系统的主要要 求之一, 正交频分复用技术 ( Orthogonal Frequency Division Multiplexing , OFDM ) 正是一种主要的支撑物理层技术。 在多用户环境中对应的正交频分 多用户接入技术 ( Orthogonal Frequency Division Multiplexing Access , OFDMA ),多个移动终端能够在细分的子载波资源层面复用频谱资源,例如, 长期演进系统 (Long-Term Evolution, LTE ) 的下行链路就使用了这样的 OFDMA技术。 图 1显示了宽带无线 OFDMA基站发射机的结构框图。 各个用户的数据 经过编码调制, 基站通过多用户调度将信号映射在宽带频段中。 通过使用 OFDMA技术, 宽带频谱可以形成 N个并行的子载波承载数据, 比如 N为 2048, 基站可以将各个用户在这 N个子载波上优化调度。 对于某个用户, 一般基站会通过移动终端的信道质量反馈或者利用时分 双工系统 ( Time Division Duplex, TDD ) 上下行信道的互易性获得从基站到 某个用户 (即移动终端) 无线信道的知识, 基站可以 4巴适合用户接收 (衰落 较小) 的子载波分配给该用户, 以达到提高用户吞吐率的目的。 基站可以把 连续的子载波分配给用户, 也可以把非连续的子载波分配给用户。 图 2显示了一个频带内子载波分配的例子。 在基站发射机中, 一部分频 域子载波被用做参考训练信号, 发送的是确定已知信号, 另一部分频域子载 波用于承载要传输的业务数据。 参考信号子载波可以帮助接收机进行信道估 计, 进而以完成数据的相千解调。 除此以外, 有一些子载波承载相关的控制信道信息, 基站利用有关的控 制信道将调度信息和各个业务信道的参数 (如编码率, 调制方式等) 及时通 知各个用户。 另外, 还有一些公用的控制信道, 比如同步信号, 广播信道等, 也会占用一定数量的频域子载波资源, 与其他信道的子载波互不重叠的映射 在系统频带中。 整个频率段内各个符号映射完后故快速傅立叶逆变换 ( Inverse Fast Fourier Transform, IFFT ), 将频 i或信号转化到时 i或, 加上循环前缀作为抗 OFDM符号间千扰的保护, 通过数模转换模块 (Digital Analog Converter, DAC )、 射频模块 ( Radio Frequency, RF ) 等模块从天线发射到整个小区。 在 OFDMA系统中, 各个移动终端接收下行信号, 移动终端的接收机的 框图如图 3所示。 空口信号经过射频模块 RF变换到基带并经过模数转换模 块 ADC釆样为基带信号, 时域上去除循环前缀, 继而对时域 OFDM符号釆 样完成傅立叶 FFT变换, 得到频率域的数据; 在解映射模块中, 各个移动终 端取出属于自己的子载波以及相关的参考子载波信号。 宽带系统中有特殊的 控制信道或者控制信令,用于通知每个用户基站给其分配的时频资源的位置。 接下来, 信号估计模块利用参考子载波信号对从基站到用户的频域子载波信 道进行估计; 解调模块根据信道估计值对数据子载波信号进行相千解调, 得 到对应的数据比特判决值, 送往解码模块进行译码, 最后得到数据信息。 在传统的用于宽带系统的接收机中, 射频模块 RF , 模数转换模块 ADC , 傅立叶变换模块 FFT等模块都工作在高数据速率的模式下, 用户将以较大功 耗进行接收。 但是用户在很多时候没有高速数据业务, 例如该用户的有效数 据带宽仅占 180kHz,传统的用于宽带系统的接收机仍然会以全带宽接收方式 接收该信号, 接收机仍然处于处理负荷较高的接收状态, 无疑会消耗较多的 电池能量。 对于用户的便携设备而言, 电池的工作时间长短将会密切影响到 移动通信产品的用户体-险。 发明内容 本发明的主要目的在于提供一种业务数据传输方法、接收机、移动终端、 发射机以及基站, 以解决上述问题。 根据本发明的一个方面, 提供了一种业务数据传输方法, 包括: 移动终 端的接收机接收基站发送的控制信号, 其中, 控制信号用于指示为移动终端 分配的多个子载波, 多个子载波用于传输业务数据; 判断多个子载波中的最 高频率 FREm与最氏频率 FRELow之差是否超过门限值 THB ; 如果不超过, 则 接收机釆用窄带模式接收业务数据, 否则, 釆用宽带模式接收业务数据。 根据本发明的另一方面, 提供了一种接收机, 设置于移动终端, 包括: 射频模块以及接收机控制模块, 其中, 射频模块, 用于接收移动终端接入的 基站发送的控制信号, 并输出至接收机控制模块, 以及用于接收后续来自基 站的业务数据, 其中, 控制信号用于指示为移动终端分配的多个子载波, 多 个子载波用于传输业务数据; 接收机控制模块, 用于判断多个子载波中的最 高频率 FREm与最低频率 FRELOW之差是否超过门限值 THB , 如果不超过, 则 釆用窄带模式接收业务数据, 否则, 釆用宽带模式接收业务数据。 根据本发明的再一方面, 提供了一种移动终端, 包括上述接收机。 根据本发明的又一个方面, 提供了一种发射机, 包括: 编码模块、 调试 模块、 映射与复用模块、 傅立叶逆变换模块、 数模转换模块、 射频模块以及 调度模块, 其中, 调度模块包括: 模式确定子模块, 用于判断接入基站的移 动终端的当前业务是否为非高速传输业务, 如果是, 则触发配置子模块为移 动终端配置与窄带模式对应的频率资源; 配置子模块, 用于为移动终端分配 多个子载波, 生成指示多个子载波的控制信号, 并控制射频模块向移动终端 发送控制信号, 其中, 多个子载波用于业务数据传输, 且多个子载波中的最 高频率 FREHlgh与最氐频率 FREL。W之差不超过门限值 THB。 才艮据本发明的又一个方面, 提供了一种基站, 包括上述发射机。 釆用本发明上述技术方案, 基站可将用户配置在低功耗的窄带接收模式 下, 基站为用户分配窄带资源承载其业务数据, 并通过特定时频位置的信息 通知用户有关调度信息; 用户接收机可以通过自适应的将中心频谱搬移、 窄 带信号滤出以实现窄带接收, 从而使接收机处理的信号带宽变窄, 数字釆样 率变低, FFT模块计算量以及相关存储减小, 进而达到降低移动终端功耗开 销的效果。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中: 图 1是才艮据相关技术的宽带无线 OFDMA基站发射机的结构框图; 图 2是根据相关技术的全带宽频带内子载波分配示意图; 图 3是根据相关技术的移动终端的接收机结构框图; 图 4是根据本发明实施例一的发射机的结构框图; 图 5是根据本发明实施例一的窄带带宽的频谱分配示意图; 图 6是根据本发明实施例二的接收机结构示意图; 图 7是根据本发明实施例二的接收机优选结构示意图; 图 8是才艮据本发明实施例三的业务数据传输方法的流程图; 图 9是根据本发明实施例三的窄带模式接收业务数据的流程图; 图 10是才艮据本发明实施例四的全频率带宽的频谱分配示意图; 图 11是才艮据本发明实施例四的时频资源调度图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组合。 实施例一 在本实施例中, 提供了一种发射机, 与现有技术不同的是, 如图 4所示, 该发射机的调度模块包括: 模式确定子模块 400、 配置子模块 402 , 其中, 模式确定子模块 400 , 用于判断接入基站的移动终端的当前业务是否为 非高速传输业务, 如果是, 则触发配置子模块 402为移动终端配置与窄带模 式对应的频率资源, 否则, 确定移动终端釆用宽带模式接收业务数据; 配置子模块 402 , 用于为移动终端分配用于业务数据传输的多个子载波, 生成指示多个子载波的控制信号,并控制射频模块向移动终端发送控制信号, 其中, 多个子载波中的最高频率 FREm与最氐频率 FRELow之差不超过门限值
THB。 导致目前现有移动终端消耗较多的电池能量的原因在于, 无论当前移动 终端处于高速率业务还是低速率业务, 现有的基站发射机只能为移动终端配 置宽带频率资源, 即在整个频带中一直为移动终端分配宽带频率资源, 使得 现有移动终端接收机的 RF、 ADC以及 FFT等模块的不得不工作在高数据速 率的模式下, 以较大的功率接收业务数据。 与现有的发射机相比, 本实施例 提供的发射机, 通过设置上述两个子模块实现了模式判断功能和频域资源配 置功能, 对不需要高速传输业务数据的移动终端, 上述发射机为其分配窄带 频率资源, 从而使移动终端的接收机可以将 RF、 ADC以及 FFT等模块调整 到低功率接收业务数据, 减少了电量消耗。 在实施过程中, 通过上述模式确定子模块 400 , 判断当前接入到基站的 移动终端的业务类型, 如果移动终端的业务类型需要极高的传输速度, 例如 实时视频业务或高速文件下载业务, 则上述模式确定子模块 400确定该移动 终端需要釆用宽带模式接收业务数据, 为其分配宽带频带资源。 如果移动终 端的业务类型无需极高的传输速度, 例如语音业务、 短消息业务、 文本浏览 等长时间处于低数率传输状态的业务, 则上述模式确定子模块 400确定该移 动终端釆用窄带模式接收业务数据, 触发配置子模块 402为该移动终端分配 窄带频率资源。 在 LTE系统中, 以 12个子载波构成一个频率资源块 ( Resource Block, RB ), 频率分配以频率资源块为基本单位, 20MHz带宽内的 1200个数据子 载波为 100个 RB。 在实施过程中, 如果上述模式确定子模块 400确定上述移动终端釆用窄 带模式接收业务数据, 则配置子模块 402为其分配的频率资源为一个包括多 个子载波的窄带, 图 5给出了一个窄带分配的示例, 支设为一个移动终端的 语音业务分配的窄带为: 序号是 80, 81和 83的 RB (编号从低频到高频一 次为 0, 1 , ... , 99 )。 优选地, 射频模块釆用宽带模式或窄带模式发送控制信号。 在实施过程中,控制信号的发送可以选择釆用宽带模式或窄带模式发送, 如釆用宽带模式发送, 则基站的发射机则将控制信号映射到整个频带的任意 RB 中发送, 如果釆用窄带模式发送, 则基站的发射机釆用上述频率资源分 配方式, 经过调度协调, 将控制信号映射到频带的指定 RB中发送。 釆用窄带模式发送控制信号, 使移动终端的接收机可以将 RF、 ADC 以 及 FFT等模块调整到低功率接收控制信号,使得移动终端尽可能长时间的处 于低功耗接收状态, 从而进一步减少了移动终端的电量消耗。 优选地, 调度模块还包括: 发送控制子模块 404 , 用于控制射频模块在 J。 + w *J时隙发送控制信号, 在 J。 + w *J + l至 r。 + (« + l) *J的时隙内发送业务 数据, 其中, Γ。为基准时隙, n > 0 , J≥0。 在实施过程中, 基站和移动终端可以但不限于通过控制信号协商上述模 式判断时隙、 控制信号和业务数据的传输时隙以及传输周期, 从而使移动终 端可以及时有效地调整接收模式, 尽可能地处于低功耗状态。 在本实施例中,还提供了一种基站,该基站除具有现有基站的功能之外, 还包括本实施例提供的上述任意一种发射机, 实现模式判断功能和频域资源 配置功能, 对不需要高速传输业务数据的移动终端, 上述基站为其分配窄带 频率资源, 从而使移动终端可以将 RF、 ADC以及 FFT等模块调整到低功率 接收业务数据, 减少了电量消耗。 实施例二 在本实施例中, 提供了一种接收机, 如图 6所示, 该接收机包括: 射频 模块 (RF ) 60、 接收机控制模块 61 , 其中, 射频模块 60 , 用于接收来自移 动终端接入的基站的控制信号, 并输出至接收机控制模块 61 , 以及用于接收 后续来自基站的业务数据, 其中, 控制信号用于指示为移动终端分配的用于 业务数据传输的多个子载波; 接收机控制模块 61 , 用于判断多个子载波中的 最高频率 FREm与最氏频率 FRELow之差是否超过门限值 THB , 如果不超过, 则釆用窄带模式接收业务数据, 否则, 釆用宽带模式接收业务数据。 无论当前业务是低速率业务还是高速率业务, 现有的移动终端的接收机 都需要按照小区的系统带宽设定 RF, ADC, FFT 等模块的工作参数, 工作 在高数据速率的模式下以较大的功率接收业务数据。 与现有的发射机相比, 本实施例提供的接收机, 通过上述接收机控制模块 61 实现了判断频率资源 及确定接收模式的功能, 对不需要高速传输的业务数据, 上述接收机将接收 模式设置为窄带接收模式, 从而使移动终端的接收机可以将 RF、 ADC 以及 FFT等模块调整到低功率接收业务数据, 减少了电量消耗。 优选地, 如图 7所示, 本实施例提供的接收机还可以包括: 低通滤波器 模块 (LPF ) 62、 模数转换模块 (ADC ) 63、 傅立叶变换模块 ( FFT ) 64、 氐功耗控制模块 65 , 解映射模块 66 , 信道估计模块 67 , 解调模块 68、 解码 模块 69 ,其中,低功耗控制模块 65分别与射频模块 60、低通滤波器模块 62、 模数转换模块 63、 傅立叶变换模块连接 64 , 用于在接收机控制模块 61的控 制下分别为射频模块 60、 低通滤波器模块 62、 模数转换模块 63、 傅立叶变 换模块 64配置在窄带工作模式下的工作参数, 射频模块 60、 低通滤波器模 块 62、 模数转换模块 63、 傅立叶变换模块 64可以在配置为窄带工作模式的 工作参数之后进行低功率业务数据接收和处理, 其余模块与现有的接收机中 的相应模块功能相同。 通过在接收机中设置上述低功耗控制模块 65 , 响应接收机控制模块 61 的窄带接收模式要求, 为射频模块 60、 低通滤波器模块 62、 模数转换模块 63、 傅立叶变换模块 64 配置窄带模式下的低功率工作参数, 使得接收机可 以自适应于各种信号带宽, 对于低速率业务, 例如语音业务, 文字浏览等业 务, 处于氏功率工作状态下的接收机可以有效地节省移动终端的电池消耗, 延长电池使用时间。 在实施过程中, 宽带模式下一般为射频模块 60、 低通滤波器模块 62、 模数转换模块 63、 傅立叶变换模块 64配置以下工作参数:
( 1 ) 配置射频模块的中心频率 fc; ( 2 ) 配置低通滤波器模块的通带为移动终端所处的系统的带宽;
( 3 ) 配置模数转换模块的釆样频率 fs;
( 4 ) 配置傅立叶变换模块的变换尺寸 N。 优选地, 接收机控制模块 61或低功耗控制模块 65可以但不限于通过以 下方式为射频模块 60、 低通滤波器模块 62、 模数转换模块 63、 傅立叶变换 模块 64配置窄带模式下的工作参数:
( 1 )配置射频模块的中心频率 = _ + ^^ ^^。 其中, /C为 射频模块在宽带模式下的中心频率; ( 2 ) 配置模数转换模块的釆样频率 ¾ = /M ,其中, fs为模数转换模 块在宽带模式下的釆样频率, M = 2" , 并且取值使得 ¾>(l + r) 成立的最 小整数, 其中, B二 FRE gh-FRELow, r为接收机工作参数, 取正小数; (3) 配置低通滤波器模块的通带 = ^^ _ ^^^, 配置低通滤波 器模块的止带小于 Fs;
(4) 配置傅立叶变换模块的变换尺寸 N' = N/M , 其中 N为傅立叶变 换模块在宽带模式下的变换尺寸。 通过上述参数配置方式, 使得移动终端的接收机可以将 RF、 ADC以及 FFT等模块调整到低功率接收业务数据, 从而实现了低速率业务的窄带模式 接收业务数据, 减少了移动终端的电量消耗。 优选地, 射频模块 60可以釆用宽带模式或窄带模式接收控制信号。 在实施过程中, 不仅业务数据可以釆用窄带模式接收, 同样, 为了进一 步降低移动终端的电池消耗, 控制信号也可以釆用窄带模式接收, 即移动终 端的接收机通过之前接收到的控制信号, 或者人为地与基站发射机协商为控 制信号分配的频率资源, 将控制信号映射到整个频带的某个频段上, 接收机 根据频率资源特点配置射频模块 60、 低通滤波器模块 62、 模数转换模块 63、 傅立叶变换模块 64 的工作参数, 自适应地调整接收机的功耗, 从而尽可能 地使接收机处于低功耗状态下, 进一步减少移动终端的电池消耗。 优选地, 射频模块 60 在 Jo + w*J时隙接收控制信号, 在 Jo + w*J + l至 r0 + (« + l)*J的时隙内接收业务数据, 其中, Γ。为基准时隙, n>0 , J≥0。 在实施过程中, 基站和移动终端可以但不限于通过控制信号协商上述模 式判断时隙、 控制信号和业务数据的传输时隙以及传输周期, 从而使移动终 端可以及时有效地调整接收模式, 尽可能地处于低功耗状态。 在本实施例中, 还提供了一种移动终端, 该移动终端除具有现有移动终 端的功能之外, 还包括本实施例提供的上述任意一种接收机, 实现频率资源 判断功能、 接收模式选择功能以及接收机工作参数配置功能, 如果当前移动 终端判断不需要高速传输业务数据, 该移动终端设定接收模式为窄带模式、 并配置窄带模式下的各个模块的工作参数,从而使移动终端可以将 RF、 ADC 以及 FFT等模块调整到低功率接收业务数据, 尽可能地降低电量消耗。 实施例三 在本实施例中, 提供一种业务数据传输方法, 以实现上述实施例一和实 施例二中基站发射机和移动终端接收机的功能, 图 8是根据本发明实施例三 的业务数据传输方法的流程图, 包括: 步骤 S802 , 移动终端的接收机接收来自基站的控制信号, 其中, 控制信 号用于指示为移动终端分配的用于业务数据传输的多个子载波; 步骤 S 804 ,判断多个子载波中的最高频率 FREHLGH与最氐频率 FREL。W之差 是否超过门限值 Hs , 如果是, 则执行步骤 S 806 , 否则, 执行步骤 S 808; 步骤 S806 , 接收机釆用宽带模式接收业务数据; 步骤 S808 , 接收机釆用窄带模式接收业务数据。 现有的业务数据传输方法, 无论当前业务是处于低速率业务还是高速率 业务, 移动终端的接收机都需要按照小区的系统带宽设定 RF , ADC , FFT 等模块的工作参数, 只能工作在高数据速率的模式下, 以较大的功率接收业 务数据。 与相关技术相比, 本实施例提供的业务数据传输方法, 通过接收机 判断频率资源及确定接收模式的功能, 对于不需要高速传输的业务数据, 上 述接收机将接收模式设置为窄带接收模式, 从而使移动终端的接收机可以将 RF、 ADC以及 FFT等模块调整到低功率接收业务数据, 降低移动终端的电 量消耗。 优选地, 如图 9所示, 接收机釆用窄带模式接收业务数据包括: 步骤 S902 , 分别配置接收机的射频模块、 低通滤波器模块、 模数转换模 块以及傅立叶变换模块的工作参数, 该工作参数对应于窄带模式; 在实施过程中, 接收机确定使用窄带接收模式接收业务数据后, 为射频 模块、 低通滤波器模块、 模数转换模块、 傅立叶变换模块配置窄带模式下的 低功率工作参数,使得接收机可以自适应于各种信号带宽,对于低速率业务, 例如语音业务, 文字浏览等业务, 处于氏功率工作状态下的接收机可以有效 地节省移动终端的电池消耗, 延长电池使用时间。 步骤 S904, 通过配置后的射频模块、 低通滤波器模块、 模数转换模块以 及傅立叶变换模块接收业务数据。 完成窄带模式的上述参数配置之后, 接收机的射频模块接收信号, 下变 频并经过低通滤波器模块进行低通滤波, 然后再经过模数转换模块釆样, 送 往傅立叶变换模块处理模块, 得到频率域数据后, 进行正常的基于时频域内 插滤波的信道估计, 然后进行解调、 解码。 至此, 完成窄带模式下业务数据 的接 ^欠。 在实施过程中, 宽带模式下一般为射频模块、 低通滤波器模块、 模数转 换模块、 傅立叶变换模块配置以下工作参数:
( 1 ) 配置射频模块的中心频率 fc;
( 2 ) 配置低通滤波器模块的通带为移动终端所处的系统的带宽; ( 3 ) 配置模数转换模块的釆样频率 fs;
( 4 ) 配置傅立叶变换模块的变换尺寸 N。 优选地, 接收机可以但不限于通过以下方式为射频模块、 低通滤波器模 块、 模数转换模块、 傅立叶变换模块 6配置窄带模式下的工作参数:
( 1 )配置射频模块的中心频率 = _ + ^^ ^^ , 其中, /C为 射频模块在宽带模式下的中心频率;
( 2 ) 配置模数转换模块的釆样频率 ¾ = /M ,其中, fs为模数转换模 块在宽带模式下的釆样频率, M = 2" , 并且取值使得 ¾ > (l + r) 成立的最 小整数, 其中, B 二 FREmgh _ FRELOW , r为接收机工作参数, 取正小数; ( 3 ) 配置氏通滤波器模块的通带 B = FREmgh - FRELOW , 配置所述氐通 滤波器模块的止带小于 Fs; ( 4 )配置傅立叶变换模块的变换尺寸 N ' = N / M , 其中 N为傅立叶变换模块在宽带模式下的变换尺寸。 通过上述参数配置方式, 使得移动终端的接收机可以将 RF、 ADC 以及 FFT等模块调整到低功率接收业务数据, 从而实现了低速率业务的窄带模式 接收业务数据, 减少了移动终端的电量消耗。 优选地, 接收机可以釆用宽带模式或窄带模式接收控制信号。 在实施过程中, 不仅业务数据可以釆用窄带模式接收, 同样, 为了进一 步降低移动终端的电池消耗, 控制信号也可以釆用窄带模式接收, 即移动终 端的接收机通过之前接收到的控制信号, 或者人为地与基站发射机协商为控 制信号分配的频率资源, 将控制信号映射到整个频带的某个频段上, 接收机 根据频率资源特点配置射频模块、 低通滤波器模块、 模数转换模块、 傅立叶 变换模块的工作参数, 自适应地调整接收机的功耗, 从而尽可能地使接收机 处于氏功耗状态下, 进一步减少移动终端的电池消耗。 优选地, 射频模块在 J。 + w *J时隙接收控制信号, 在 J。 + w *J + l至 r0 + (« + l) *J的时隙内接收业务数据, 其中, Γ。为基准时隙, n > 0 , J≥0。 在实施过程中, 基站和移动终端可以但不限于通过控制信号协商上述模 式判断时隙、 控制信号和业务数据的传输时隙以及传输周期, 从而使移动终 端可以及时有效地调整接收模式, 尽可能地处于低功耗状态。 实施例四 本实施例以一个具体的实例对实施例一、 二、 三进行详细介绍。 £设系统带宽为 20MHz ( LTE的系统频宽;), 在全频带 (即上述宽带模 式)接收机中, 中心频率为 fc, 基带釆样率 fs = 30.72MHz, FFT模块内完成 2048点的 FFT变换,频域中以 DC为中心的 1200个频域子载波 载数据(不 包含 DC子载波), 子载波间隔为 15kHz, 全频率带宽分配示例如图 10。 如图 5所示的窄带分配的示例, 個―设基站为一个语音业务用户分配窄带 的频 i或资源块 RB序号是 80 , 81和 83 (编号 氐频到高频一次为 0 , 1 , ... , 99 )。 如图 11所示, 基站通过在 T=0时隙 (比如 1个时隙为 1ms )的控制信 道将信道分配信息传给用户。 后续经历 Lms (也就是 L个时隙, L值可以根 据用户信变化快慢决定, 越慢变化该值越小) 后, 基站可以再次对用户进行 调度, 并发送相关控制信道信息。 在 T=0时隙, 用户釆用宽带模式接收控制信道信息。 用户获得的频谱起始点和终止点分别为 freqLow= ( ( 80-50 ) * 12+1 ) * 15/1000=5.415MHz freqHigh= ( ( 83-50 ) * 12 ) * 15/ 1000=5.940MHz 注意这里只关心用户分配频域资源的最大值和最小值, 中间可以含有空 缺资源块。 这个带宽分配信息一般是从控制信号得到的, 比如基站可以通过有关物 理信道或者有关信令告诉用户其未来时刻或者未来一段时间内给用户分配的 资源。 例如, 某用户的语音业务, 在通话期间, 基站可以半持续的给用户分 配固定的带宽。 用户获得带宽相关信息后, 接收机的控制模块可以进行判断 是否进入窄带接收模式。 设定 ThB=B system/4 = 5MHz, 因为 B = freqHigh - freqLow = 5.940-5.415 = 0.525MHz < ThB, 所以用户 将进入窄带接收模式。 接收机的控制模块为 RF, LPF, ADC, FFT等模块设定为以下参数: RF中的本振中心频率设为 fc+(FreqHigh + FreqLow)/2= fc+5.6775MHz; 抗混叠滤波器的通带设为 B=0.525MHz; 设 r = 0.2, 则 M<fs/(l+r)/B = 48.7, 取 M=25=32; ADC的新釆样率为 Fs' =fs/M =0.96MHz; 抗混叠滤波器的止带小于上述 Fs, FFT变换的尺寸设定为 N'=N/M=64。 各个模块的参数设定完成之后, 信号经过 RF, LPF, ADC 釆样, 然后 经过 FFT模块得到频率域数据, 原来频谱中 80, 81 , 83号的 RB的全部数 据毫无遗漏的被收到接收机处。 解映射模块相应的分离出用于信道估计的参 考信号和承载数据的子载波信号。 后续的信道估计模块利用常规的频域时域 内插滤波方法进行信道估计, 为了提高信道估计的性能, 可以考虑接收有用 带宽邻近的更多 RB资源块的信号, 这样可以利用到更多的频域参考信号, 为此只要适当增大 r值进而设置 M值就可以调整接收处理信号的带宽。比如, 如果本例中设 M=16, 则处理的信号带宽则可增长为 1.25MHz, 对应 10 个 RB资源块, 这样可以提供更多的参考信号子载波, 进而提高信道估计精度。 信道估计完成后, 解调模块对数据子载波上的数据进行解调, 送往解码 器进行解码, 这样就完成了窄带内数据的接收。 从上面的过程看到, 窄带接收机完成了数据的接收, 但是比起全带宽接 收机而言, 其前级处理模块的处理复杂度大幅降低, 大约仅为全带宽接收机 的 1/32! 这样将大幅降低接收机的功率消耗, 延长移动终端设备电池的工作 寿命。 同时, 本接收机是自适应控制的, 在某些情况下, 尽管用户的业务为窄 带低速业务, 但出于其他目的, 用户仍然可以自由选择窄带接收或者全带宽 接收, 比如基站会让接收机不定时或者周期性的评估下行信道的质量, 在这 些时刻, 用户接收机可以选择全带宽接收模式。 釆用本发明实施例提供的上述技术方案, 基站可将用户配置在低功耗的 窄带接收模式下, 基站为用户分配窄带资源承载其业务数据, 并通过特定时 频位置的信息通知用户有关调度信息; 移动终端的接收机可以通过自适应的 将中心频谱搬移、 窄带信号滤出以实现窄带接收, 从而使接收机处理的信号 带宽变窄, 数字釆样率变低, FFT模块计算量以及相关存储减小, 进而达到 降氏移动移动终端功耗开销的效果。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并 且在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步 4聚, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件 结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的 ^"神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。

Claims

权 利 要 求 书 一种业务数据传输方法, 其特征在于, 包括: 移动终端的接收机接收基站发送的控制信号, 其中, 所述控制信号 用于指示为所述移动终端分配的多个子载波, 所述多个子载波用于传输 业务数据;
判断所述多个子载波中的最高频率 FREm与最氐频率 FRELow之差是 否超过门限值 Hs;
如果不超过, 则所述接收机釆用窄带模式接收所述业务数据, 否则, 釆用宽带模式接收所述业务数据。 根据权利要求 1所述的方法, 其特征在于, 所述接收机釆用窄带模式接 收所述业务数据包括:
分别配置所述接收机的射频模块、 低通滤波器模块、 模数转换模块 以及傅立叶变换模块的工作参数, 所述工作参数对应于所述窄带模式; 利用配置了所述工作参数后的射频模块、 低通滤波器模块、 模数转 换模块以及傅立叶变换模块接收所述业务数据。 根据权利要求 2所述的方法, 其特征在于,
配置所述射频模块的工作参数包括: 配置所述射频模块的中心频率 Fc = fC+ FRE gh 2 +FRELw 其中, 所述/ C为所述射频模块在所述宽带 模式下的中心频率;
配置所述模数转换模块的工作参数包括: 配置所述模数转换模块的 釆样频率 ¾ = filM , 其中, 所述 为所述模数转换模块在所述宽带模 式下的釆样频率, 所述 Λ/ = 2", 并且取使得 ¾>(l + r)S成立的最小整 数值, 其中, n取正整数, B二 FRE gh_FRELOW, r为接收机工作参数; 配置所述低通滤波器模块的工作参数包括: 配置所述低通滤波器模 块的通带 B = FREwgh-FREiow , 配置所述低通滤波器模块的止带小于所 配置所述傅立叶变换模块的工作参数包括: 配置所述傅立叶变换模 块的变换尺寸 N ' = N /M , 其中所述 N为所述傅立叶变换模块在宽带模 式下的变换尺寸。 根据权利要求 1所述的方法, 其特征在于, 所述接收机釆用宽带模式或 窄带模式接收所述控制信号。 根据权利要求 1 至 4任一项所述的方法, 其特征在于, 在 JQ + w *J时隙 接收所述控制信号, 在 Γ。 + w * J + 1至 Γ。 + 0 + 1) * J的时隙内接收所述业务 数据, 其中, Γ。为基准时隙, n > 0 , J≥0。 一种接收机, 其特征在于, 包括:
射频模块, 用于接收移动终端接入的基站发送的控制信号, 并输出 至接收机控制模块, 以及用于接收后续来自所述基站的业务数据, 其中, 所述控制信号用于指示为所述移动终端分配的多个子载波, 所述多个子 载波用于传输业务数据;
所述接收机控制模块, 用于判断所述多个子载波中的最高频率 FREmgh与最低频率 FREL。W之差是否超过门限值 ΊΉΒ , 如果不超过, 则釆 用窄带模式接收所述业务数据, 否则, 釆用宽带模式接收所述业务数据。 根据权利要求 6所述的接收机, 其特征在于, 还包括:
低通滤波器模块、 模数转换模块、 傅立叶变换模块、 低功耗控制模 块, 解映射模块, 信道估计模块, 解调模块、 解码模块, 其中,
所述低功耗控制模块, 分别与所述射频模块、 所述低通滤波器模块、 所述模数转换模块、 所述傅立叶变换模块连接, 用于在所述接收机控制 模块的控制下分别为所述射频模块、 所述低通滤波器模块、 所述模数转 换模块、 所述傅立叶变换模块配置窄带工作模式下的工作参数。 根据权利要求 7所述的接收机, 其特征在于,
所述低功耗控制模块用于配置所述射频模块的工作参数包括: 配置 所述射频模块的中心频率 Fc = fc , 其中, 所述 /c为 所述射频模块在宽带模式下的中心频率; 所述低功耗控制模块用于配置所述模数转换模块的工作参数包括: 配置所述模数转换模块的釆样频率 ¾ = fi lM , 其中, 所述 为所述模 数转换模块在宽带模式下的釆样频率, 所述 = 2" , 并且取使得 i¾ > (l + r)S成立的最小整数值, 其中, B = FREHlgh _ FRELow , r 为接 收机工作参数;
所述低功耗控制模块用于配置所述低通滤波器模块的工作参数包 括: 配置所述低通滤波器模块的通带 B = FREwgh - FRELOW , 配置所述低 通滤波器模块的止带小于 Fs;
所述低功耗控制模块用于配置所述傅立叶变换模块的工作参数包 括: 配置所述傅立叶变换模块的变换尺寸 N ' = N /M , 其中所述 N为所 述傅立叶变换模块在宽带模式下的变换尺寸。
9. 根据权利要求 6所述的接收机, 其特征在于, 所述射频模块用于釆用宽 带模式或窄带模式接收所述控制信号。
10. 根据权利要求 6至 9任一项所述的接收机, 其特征在于, 所述射频模块 用于在 Jo + w *J时隙接收所述控制信号, 在 Jo + w *J + l至 Γ。 + 0 + 1) * 的 时隙内接收所述业务数据, 其中, Γ。为基准时隙, n > 0 , J≥0。
11. 一种移动终端, 其特征在于, 包括权利要求 6至 9任一项所述的接收机。
12. 一种发射机, 其特征在于, 包括: 编码模块、 调试模块、 映射与复用模 块、 傅立叶逆变换模块、 数模转换模块、 射频模块以及调度模块, 其中, 所述调度模块包括:
模式确定子模块, 用于判断接入基站的移动终端的当前业务是否为 非高速传输业务, 如果是, 则触发配置子模块为所述移动终端配置与窄 带模式对应的频率资源;
所述配置子模块, 用于为所述移动终端分配多个子载波, 生成指示 所述多个子载波的控制信号, 并控制所述射频模块向所述移动终端发送 所述控制信号, 其中, 所述多个子载波用于业务数据传输, 且所述多个 子载波中的最高频率 FREHLGH与最氐频率 FREL 之差不超过门限值 THB。
13. 根据权利要求 12所述的发射机, 其特征在于, 所述射频模块用于釆用宽 带模式或窄带模式发送所述控制信号。
14. 根据权利要求 12或 13所述的发射机, 其特征在于, 所述调度模块还包 括:
发送控制子模块, 用于控制所述射频模块在 J。 + w*J时隙发送所述 控制信号, 在 J。 + w*J + l至 r。 + (« + i)*J的时隙内发送所述业务数据, 其 中, Γ。为基准时隙, n>0 , J≥0。
15. —种基站, 其特征在于, 包括权利要求 12或 13所述的发射机。
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