WO2016184097A1 - 一种信号处理方法、网络设备、***及计算机存储介质 - Google Patents

一种信号处理方法、网络设备、***及计算机存储介质 Download PDF

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Publication number
WO2016184097A1
WO2016184097A1 PCT/CN2015/098062 CN2015098062W WO2016184097A1 WO 2016184097 A1 WO2016184097 A1 WO 2016184097A1 CN 2015098062 W CN2015098062 W CN 2015098062W WO 2016184097 A1 WO2016184097 A1 WO 2016184097A1
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Prior art keywords
signal
cca
reference signal
target channel
time
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PCT/CN2015/098062
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English (en)
French (fr)
Inventor
薛飞
赵亚军
马志锋
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中兴通讯股份有限公司
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Priority to EP15892471.2A priority Critical patent/EP3297200A4/en
Priority to US15/573,868 priority patent/US10193719B2/en
Publication of WO2016184097A1 publication Critical patent/WO2016184097A1/zh

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    • 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), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/0006Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • 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
    • H04L27/2602Signal structure
    • H04L27/2605Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607Cyclic extensions
    • 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
    • H04L27/2614Peak power aspects
    • 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
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0058Allocation criteria
    • H04L5/006Quality of the received signal, e.g. BER, SNR, water filling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • 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
    • H04L27/2627Modulators
    • H04L27/2628Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
    • 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), DMT
    • H04L5/001Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • H04L5/0096Indication of changes in allocation
    • H04L5/0098Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14Spectrum sharing arrangements between different networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present invention relates to channel processing technologies in the field of communications, and in particular, to a signal processing method, a network device, a system, and a computer storage medium.
  • the channel usage rights are shared between systems or devices.
  • LAI Licensed Assisted Access
  • the LAI base station obtains the channel usage right, it may occur that the signal transmission start time point is located in the middle of the subframe, especially when the signal transmission start time point is located in the middle of the OFDM symbol, The effective identification channel is occupied by the LAA system, which in turn cannot enable the peer to quickly identify the channel occupied by the LAA system, which affects the user experience of using the LAA system.
  • the embodiments of the present invention provide a signal processing method, a network device, a system, and a computer storage medium, which can solve at least the above problems in the prior art.
  • the embodiment of the invention provides a signal processing method, which is applied to a network device at a transmitting end, and the method includes:
  • the first reference signal is generated based on the frequency domain density of the first reference signal and the energy value of the first reference signal on the time-frequency resource, including:
  • the generating the CCA signal based on the time-frequency resource location of the target channel and the first reference signal includes:
  • the determining, according to the time-frequency resource location of the target channel, determining a transmission mode of the CCA signal including:
  • Determining that the CCA signal is sent once for each preset number of subcarriers in the frequency domain acquiring a transmission moment of the CCA signal, determining a first duration based on a sending moment of the CCA signal;
  • a transmission mode of the CCA signal is a first transmission mode, where the first transmission mode is only transmitting within the first duration Said CCA signal;
  • a transmission mode of the CCA signal is a second transmission mode, where the second transmission mode is adjacent to the first duration and time domain.
  • the CCA signal is transmitted within the next complete OFDM symbol and the cyclic prefix length of the OFDM symbol.
  • the generating, according to the transmission mode of the CCA signal and the time domain signal of the first reference signal, the CCA signal including:
  • the transmission mode of the CCA signal is the first transmission mode, setting a duration of the time domain signal of the first reference signal to a first duration to obtain a CCA signal;
  • the transmission mode of the CCA signal is the second transmission mode
  • set the duration of the time domain signal of the first reference signal to be equal to the first duration plus one complete OFDM symbol duration plus the cyclic prefix length of the OFDM symbol.
  • the generating the CCA signal based on the time-frequency resource location of the target channel and the first reference signal includes:
  • the embodiment of the invention provides a signal processing method, which is applied to a network device at a receiving end, and the method includes:
  • the target channel carries a CCA signal, determining that the target channel is used for transmission Information about the LAA system.
  • the determining, by using the preset first reference signal, whether the CCA signal is carried in the target channel includes: performing a sliding cross-correlation processing on the 1/4 OFDM symbol of the time domain signal of the first reference signal and the received signal, The sliding interval is a 1/4 OFDM symbol, and if there are at least two detection peaks that meet a preset condition within two OFDM symbol time lengths, the target channel is occupied by the LAA system.
  • An embodiment of the present invention provides a network device at a transmitting end, including:
  • the signal generating unit is configured to generate the first reference signal based on a frequency domain density of the first reference signal and an energy value of the first reference signal on the time-frequency resource;
  • a setting unit configured to determine a time-frequency resource location of the target channel, where the target channel is used to carry information for authorizing the auxiliary access to the LAA system; based on the time-frequency resource location of the target channel, and the first reference signal generation CCA signal;
  • a sending unit configured to map the CCA signal to the target channel, send the CCA signal to the receiving end network device by using the target channel, so that the receiving end network device identifies the target according to the CCA signal Whether the channel is used in the LAA system.
  • the signal generating unit is configured to acquire a frequency domain density of the first reference signal; and determine energy information of the first reference signal based on a frequency domain density of the first reference signal; The energy information of the first reference signal generates a frequency domain signal of the first reference signal; and converts the frequency domain signal of the first reference signal into a time domain signal.
  • the setting unit is configured to determine a transmission mode of the CCA signal based on a time-frequency resource location of the target channel, generate a mode based on the CCA signal, and generate a time domain signal of the first reference signal.
  • the CCA signal is configured to determine a transmission mode of the CCA signal based on a time-frequency resource location of the target channel, generate a mode based on the CCA signal, and generate a time domain signal of the first reference signal.
  • the setting unit is configured to determine that the CCA signal is sent once for each preset number of subcarriers in the frequency domain; and when the CCA signal is sent, the first time is determined based on the sending moment of the CCA signal. Duration; when the first duration is greater than or equal to the preset gate And determining, in the first limit, the sending mode of the CCA signal is a first sending mode, where the first sending mode is to send the CCA signal only in the first duration; when the first duration is less than the preset And determining, in the threshold, a transmission mode of the CCA signal is a second transmission mode, where the second transmission mode is a next complete OFDM symbol adjacent to the first duration and the time domain, and the OFDM symbol
  • the CCA signal is transmitted within a cyclic prefix length.
  • the setting unit is configured to: when the transmission mode of the CCA signal is the first transmission mode, set a duration of the time domain signal of the first reference signal to a first duration to obtain a CCA signal; When the transmission mode of the CCA signal is the second transmission mode, set the duration of the time domain signal of the first reference signal to a first duration plus a full OFDM symbol duration plus a cyclic prefix length of the OFDM symbol, and finally obtain a CCA signal.
  • the setting unit is configured to determine that the CCA signal is sent once for each preset number of subcarriers in the frequency domain; when the CCA signal is sent, the CCA signal is sent in the time domain based on the CCA signal. Determining, by the start point, a first duration; adding, according to the first duration, a next complete OFDM symbol adjacent to the time domain, and a cyclic prefix length of the OFDM symbol as a transmission duration of the CCA signal, based on The transmission duration loops the time domain signal of the first reference signal to obtain a CCA signal.
  • the embodiment of the invention further provides a receiving end network device, including:
  • a receiving unit configured to access a target channel
  • the signal processing unit is configured to identify whether the CCA signal is carried in the target channel based on the preset first reference signal; and if the target channel carries a CCA signal, determine that the target channel is used to transmit information of the LAA system.
  • the signal processing unit is configured to perform a sliding cross-correlation process on the 1/4 OFDM symbol of the time domain signal of the first reference signal with the received signal, and the sliding interval is 1/4 OFDM symbol if the two OFDM symbols are used.
  • the sliding interval is 1/4 OFDM symbol if the two OFDM symbols are used.
  • An embodiment of the present invention provides a signal processing system, where the system includes:
  • the transmitting network device is configured to generate the first reference signal based on a frequency domain density of the first reference signal and an energy value of the first reference signal on the time-frequency resource; and determine a time-frequency resource location of the target channel; And the target channel is used to carry information of the LAA system; and the CCA signal is mapped to the target channel by using the time-frequency resource location of the target channel and the first reference signal to generate a CCA signal, by using the Transmitting, by the target channel, the CCA signal to the receiving network device;
  • a receiving end network device configured to access a target channel; identifying, according to the preset first reference signal, whether the CCA signal is carried in the target channel; if the target channel carries a CCA signal, determining the target channel for transmitting Information about the LAA system.
  • the embodiment of the invention provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the signal processing method.
  • the signal processing method, network device and system provided by the present invention generate a first reference signal by using the above solution, determine a target channel to be occupied by the LAA system, generate a CCA signal based on the first reference signal, and map the CCA signal to The target channel is sent to the receiving network device; thus, the channel occupied by the LAA system can be effectively identified by setting a special CCA signal, so that the receiving network device can quickly identify the channel occupied by the LAA system and improve the user's use of the LAA system.
  • the experience of using is
  • FIG. 1 is a schematic flowchart of a sending end of a signal processing method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of generating a first reference signal according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram 1 of a signal time-frequency resource structure according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a time domain signal of a first reference signal according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram 1 of a CCA signal according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram 2 of a CCA signal according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram 3 of a CCA signal according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram 4 of a CCA signal according to an embodiment of the present invention.
  • FIG. 9 is a second schematic structural diagram of a signal time-frequency resource according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram 5 of a CCA signal according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram 6 of a CCA signal according to an embodiment of the present invention.
  • FIG. 12 is a schematic flowchart of a receiving end of a signal processing method according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a structure of a network device at a transmitting end according to an embodiment of the present invention
  • FIG. 14 is a schematic structural diagram of a structure of a network device at a receiving end according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of a signal processing system according to an embodiment of the present invention.
  • the embodiment of the invention provides a signal processing method, which is applied to a network device at a transmitting end. As shown in FIG. 1 , the method includes:
  • Step 101 Generate the first reference signal based on a frequency domain density of the first reference signal and an energy value of the first reference signal on the time-frequency resource.
  • Step 102 Determine a time-frequency resource location of a target channel, where the target channel is used to carry information of an authorized auxiliary access (LAA) system;
  • LAA authorized auxiliary access
  • Step 103 Generate the CCA signal based on the time-frequency resource location of the target channel and the first reference signal, map the CCA signal to the target channel, and send the CCA signal to the target channel to Receiving a network device, such that the receiving network device identifies, according to the CCA signal, whether the target channel is used in an LAA system.
  • the first reference signal may be a cell reference signal (CRS, Cell-references Signal).
  • CRS Cell-references Signal
  • the sender network device may be a base station or a terminal with an LAA function.
  • generating the first reference signal based on the frequency domain density of the first reference signal and the energy value of the first reference signal on the time-frequency resource may include the following operations:
  • Step 201 Obtain a frequency domain density of the first reference signal.
  • Step 202 Determine energy information of the first reference signal based on a frequency domain density of the first reference signal.
  • Step 203 Generate a frequency domain signal of the first reference signal based on energy information of the first reference signal.
  • Step 204 Convert the frequency domain signal of the first reference signal into a time domain signal.
  • the method for obtaining the frequency domain density of the first reference signal may be: determining a frequency domain interval for transmitting the CRS signal, based on a frequency of the CRS signal, when the first reference signal is a CRS signal.
  • the domain interval determines the frequency domain density of the CRS signal.
  • the frequency domain interval of the CRS signal is extended to 12 subcarriers, that is, there are one CRS resource element (RE, Resource Element) in every 12 subcarriers.
  • the first OFDM symbol in each resource block (RB) is set as the time domain position of the CRS.
  • only one RE resource is used for transmitting CRS signals in one RB resource block, and other RE resources are not filled with signals.
  • the power of each CRS RE is EPRE, because the CRS RE in the 3GPP protocol is a normalized QPSK, so the amplitude information of the CRS RE needs to be clear when actually transmitting, and the standard generally passes the EPRE. Make regulations; thus enabling these CRSs The RE signal energy can reach the transmission power and maintain coverage.
  • the flow is: generating Cinit; generating a Gold sequence of length 200 according to Cinit; generating a QPSK signal by generating the Gold sequence; determining a frequency domain starting position according to a cell identifier (Cell_ID);
  • the CRS time domain signal is generated after the transform (IFFT), as shown in FIG.
  • determining the time-frequency resource location of the target channel in the embodiment may be: determining that the time domain location of the target channel is before the time domain location of the synchronization channel or the secondary synchronization channel; determining the frequency of the target channel.
  • the domain location is the full bandwidth.
  • the location of the target channel may be adjacent to the synchronization channel and before the synchronization channel.
  • the CCA signal is transmitted before the synchronization channel, hysteresis caused by indirectly identifying the channel occupied by the LAA through the synchronization channel or the auxiliary synchronization channel can be avoided; and the present scheme can directly utilize the time domain feature of the CRS signal. Judging that the receiver decoding process is not required, the recognition speed can be ensured.
  • the manner of the transmission time of the target channel in the time domain may be: the target channel is an unlicensed channel, the target channel and the authorized channel operate in a carrier aggregation manner, and the target channel and the authorized channel are The time synchronization is performed. Therefore, after the LAA system obtains the channel usage right of the target channel, it knows that the CCA signal is at the time of transmitting the target channel, that is, the time domain position of the target channel is known.
  • the generating the CCA signal based on the time-frequency resource location of the target channel and the first reference signal may include: determining a transmission mode of the CCA signal based on the time-frequency resource location of the target channel, based on the The transmission mode of the CCA signal and the time domain signal of the first reference signal generate the CCA signal.
  • the determining a transmission mode of the CCA signal based on the time-frequency resource location of the target channel may include: determining that the CCA signal is sent once for each preset number of subcarriers in a frequency domain; and acquiring a transmission time of the CCA signal, Determining a first duration based on a sending moment of the CCA signal;
  • a transmission mode of the CCA signal is a first transmission mode, where the first transmission mode is to send the CCA signal only in the first duration;
  • the first duration is less than the preset threshold, determining that the transmission mode of the CCA signal is a second transmission mode, and the second transmission mode is within the first duration and time domain
  • the CCA signal is transmitted within the next complete OFDM symbol of the neighbor and the cyclic prefix length of the OFDM symbol.
  • the preset threshold may be a duration of one-half of an OFDM symbol.
  • the cyclic prefix of the OFDM symbol is a prefix in the time domain before the OFDM symbol.
  • the first duration is: starting from a sending moment of the CCA signal, starting a starting point of a next complete OFDM symbol adjacent in the time domain, and ending at the starting point to the ending point
  • the length of time is the first time.
  • the generating the CCA signal based on the transmission mode of the CCA signal and the time domain signal of the first reference signal in the embodiment may include: when the transmission mode of the CCA signal is the first transmission mode, Setting a duration of the time domain signal of the first reference signal to a first duration to obtain a CCA signal;
  • the transmission mode of the CCA signal is the second transmission mode
  • set the duration of the time domain signal of the first reference signal to a first duration plus a complete OFDM symbol duration plus a cyclic prefix of the OFDM symbol, and finally obtain CCA signal.
  • the transmission mode of the CCA signal is the first transmission mode
  • the first duration that is, the partial OFDM symbol duration, as shown in FIG. 5
  • the CCA signal is transmitted in the first duration, CCA.
  • the signal time domain diagram is shown in Figure 6, which is the diagram
  • the first reference signal described in 3 is intercepted according to the first duration to obtain a CCA signal that is less than one OFDM symbol length.
  • the time-frequency diagram of the LAA transmission signal is shown in FIG. 3, and other signals, such as a synchronization signal or a secondary synchronization channel, are transmitted in the next OFDM symbol.
  • the CRS signal with structural features can be effectively utilized for partial OFDM, and the transmission time is effectively utilized.
  • the first duration that is, the partial OFDM symbol duration is less than 1/2 OFDM duration, and thus is adjacent to the first duration and the time domain.
  • the first reference signal is cyclically repeated to obtain a CCA signal, and a time domain diagram of a specific CCA signal is shown in FIG. 8.
  • the time-frequency diagram of the LAA transmission signal is shown in FIG. 9, and the synchronization channel or the secondary synchronization channel is transmitted in the next OFDM symbol.
  • the embodiment of the invention provides a signal processing method, which is applied to a network device at a transmitting end. As shown in FIG. 1 , the method includes:
  • Step 101 Generate the first reference signal based on a frequency domain density of the first reference signal and an energy value of the first reference signal on the time-frequency resource.
  • Step 102 Determine a time-frequency resource location of a target channel, where the target channel is used to carry information of an authorized auxiliary access (LAA) system;
  • LAA authorized auxiliary access
  • Step 103 Based on a time-frequency resource location of the target channel, and the first reference Generating the CCA signal, mapping the CCA signal to the target channel, and transmitting the CCA signal to the receiving network device through the target channel, so that the receiving network device identifies the location according to the CCA signal Whether the target channel is used in the LAA system.
  • the first reference signal may be a cell reference signal (CRS, Cell-references Signal).
  • CRS Cell-references Signal
  • the sender network device may be a base station or a terminal with an LAA function.
  • the foregoing step 101 may include the following operations:
  • Step 201 Obtain a frequency domain density of the first reference signal.
  • Step 202 Determine energy information of the first reference signal based on a frequency domain density of the first reference signal.
  • Step 203 Generate a frequency domain signal of the first reference signal based on energy information of the first reference signal.
  • Step 204 Convert the frequency domain signal of the first reference signal into a time domain signal.
  • the method for obtaining the frequency domain density of the first reference signal may be: determining a frequency domain interval for transmitting the CRS signal, based on a frequency of the CRS signal, when the first reference signal is a CRS signal.
  • the domain interval determines the frequency domain density of the CRS signal.
  • the frequency domain interval of the CRS signal is extended to 12 subcarriers, that is, there are one CRS resource element (RE, Resource Element) in every 12 subcarriers.
  • the first OFDM symbol in each resource block (RB) is set as the time domain position of the CRS.
  • only one RE resource is used for transmitting CRS signals in one RB resource block, and other RE resources are not filled with signals.
  • the power of each CRS RE is EPRE, because the CRS RE in the 3GPP protocol is a normalized QPSK, so the amplitude information of the CRS RE needs to be clear when actually transmitting, and the standard generally passes the EPRE. Provision is made; thus, the energy of these CRS RE signals can be made to reach the transmission power, and the coverage is maintained.
  • CRS frequency domain signal generation method the specific process is: generating Cinit; generating a Gold sequence of length 200 according to Cinit; generating a QPSK signal by generating the Gold sequence; determining a frequency domain starting position according to the cell identifier (Cell_ID);
  • the CRS time domain signal is generated after the inverse transform (IFFT), as shown in FIG.
  • determining the time-frequency resource location of the target channel in the embodiment may be: determining that the time domain location of the target channel is before the time domain location of the synchronization channel or the secondary synchronization channel; determining the frequency of the target channel.
  • the domain location is the full bandwidth.
  • the location of the target channel may be adjacent to the synchronization channel and before the synchronization channel.
  • the CCA signal is transmitted before the synchronization channel, hysteresis caused by indirectly identifying the channel occupied by the LAA through the synchronization channel or the auxiliary synchronization channel can be avoided; and the present scheme can directly utilize the time domain feature of the CRS signal. Judging that the receiver decoding process is not required, the recognition speed can be ensured.
  • the manner of the transmission time of the target channel in the time domain may be: the target channel is an unlicensed channel, the target channel and the authorized channel operate in a carrier aggregation manner, and the target channel and the authorized channel are The time synchronization is performed. Therefore, after the LAA system obtains the channel usage right of the target channel, it knows that the CCA signal is at the time of transmitting the target channel, that is, the time domain position of the target channel is known.
  • the generating the CCA signal based on the time-frequency resource location of the target channel and the first reference signal may include: determining that the CCA signal is sent once every frequency number of sub-carriers in a frequency domain;
  • the predetermined number may be set according to an actual situation, for example, may be set according to a frequency domain density of the first reference signal, and may be sent once every 12 subcarriers in this embodiment;
  • Obtaining a transmission time of the CCA signal determining, by using a transmission time based on the CCA signal as a starting point, determining a first duration in the time domain; and adding the first duration to a next complete OFDM symbol adjacent to the time domain And adding a cyclic prefix length of the OFDM symbol as a transmission duration of the CCA signal, and circulating a time domain signal of the first reference signal according to the transmission duration to obtain a CCA signal.
  • the preset threshold may be a duration of one-half of an OFDM symbol.
  • the first duration that is, the partial OFDM symbol duration is less than 1/2 OFDM duration, and therefore the next OFDM adjacent to the first duration and the time domain and the cyclic prefix length of the OFDM symbol will be
  • the first reference signal is cyclically repeated to obtain a CCA signal, and a time domain diagram of a specific CCA signal is shown in FIG.
  • the time-frequency diagram of the LAA transmission signal is shown in FIG. 11, and the synchronization channel or the secondary synchronization channel is transmitted in the next OFDM symbol.
  • the CRS signal with structural features can be effectively utilized for partial OFDM, and this part of transmission time is effectively utilized.
  • the first reference signal can be generated, after determining the target channel to be occupied by the LAA system, generating a CCA signal based on the first reference signal, and mapping the CCA signal to the target channel and transmitting the signal to the receiving end network device;
  • the special CCA signal can be used to effectively identify the channel occupied by the LAA system, so that the receiving network device can quickly identify the channel occupied by the LAA system and improve the user experience of using the LAA system.
  • An embodiment of the present invention provides a signal processing method, which is applied to a network device at a receiving end, as shown in FIG. 12, and includes:
  • Step 1201 Access a target channel.
  • Step 1202 Identify whether the CCA signal is carried in the target channel based on the preset first reference signal.
  • Step 1203 If the target channel carries a CCA signal, determine that the target channel is used to transmit information of the LAA system.
  • the first reference signal may be a time domain signal of a CRS signal preset in the receiving end network device.
  • the receiving end network device may be a base station or a terminal with an LAA function.
  • the determining, according to the preset first reference signal, whether the CCA signal is carried in the target channel may include: performing a sliding cross-correlation process on the 1/4 OFDM symbol of the time domain signal of the first reference signal and the received signal, and the sliding interval For a 1/4 OFDM symbol, if there are at least two detected peaks that meet a preset condition within two OFDM symbol time lengths, the target channel is occupied by the LAA system.
  • the predetermined condition may be that the difference between the detected peaks is less than a threshold, for example, may be less than 0.1.
  • the step 1203 it may be determined that the target channel is occupied by the LAA system, and then the subsequent processing is performed according to the operation procedure of the LAA system.
  • the manner of presetting the first reference signal in the embodiment may be performed by a management personnel in advance, or may be calculated, for example, including: acquiring a frequency domain density of the first reference signal; Determining energy information of the first reference signal according to a frequency domain density of a reference signal; generating a frequency domain signal of the first reference signal based on energy information of the first reference signal; and frequency of the first reference signal The domain signal is converted to a time domain signal.
  • the acquiring the first reference The frequency domain density of the signal may be determined by determining a frequency domain interval for transmitting the CRS signal, and determining a frequency domain density of the CRS signal based on a frequency domain interval of the CRS signal.
  • the frequency domain interval of the CRS signal is extended to 12 subcarriers, that is, there are one CRS resource element (RE, Resource Element) in every 12 subcarriers.
  • the first OFDM symbol in each resource block (RB) is set as the time domain position of the CRS.
  • only one RE resource is used for transmitting CRS signals in one RB resource block, and other RE resources are not filled with signals.
  • the power of each CRS RE is EPRE, because the CRS RE in the 3GPP protocol is a normalized QPSK, so the amplitude information of the CRS RE needs to be clear when actually transmitting, and the standard generally passes the EPRE. Provision is made; thus, the energy of these CRS RE signals can be made to reach the transmission power, and the coverage is maintained.
  • CRS frequency domain signal generation method the specific process is: generating Cinit; generating a Gold sequence of length 200 according to Cinit; generating a QPSK signal by generating the Gold sequence; determining a frequency domain starting position according to the cell identifier (Cell_ID);
  • the CRS time domain signal is generated after the inverse transform (IFFT), as shown in FIG.
  • the first reference signal can be generated, and after determining the target channel to be occupied by the LAA system, the CCA signal is generated based on the first reference signal, and The CCA signal is mapped to the target channel and sent to the receiving network device.
  • the channel occupied by the LAA system can be effectively identified by setting a special CCA signal, so that the receiving network device can quickly identify the channel occupied by the LAA system and improve the channel. The user's experience with the LAA system.
  • An embodiment of the present invention provides a network device at a transmitting end, as shown in FIG.
  • the signal generating unit 1301 is configured to generate the first reference signal based on a frequency domain density of the first reference signal and an energy value of the first reference signal on the time-frequency resource;
  • a setting unit 1302 configured to determine a time-frequency resource location of the target channel, where the target channel is used to carry information of the LAA system; generate a CCA signal based on the time-frequency resource location of the target channel, and the first reference signal ;
  • a sending unit 1303, configured to map the CCA signal to the target channel, and send the CCA signal to the receiving network device by using the target channel, so that the receiving network device identifies the according to the CCA signal. Whether the target channel is used in the LAA system.
  • the first reference signal may be a cell reference signal (CRS, Cell-references Signal).
  • CRS Cell-references Signal
  • the sender network device may be a base station or a terminal with an LAA function.
  • the signal generating unit is configured to acquire a frequency domain density of the first reference signal; and determine energy information of the first reference signal based on a frequency domain density of the first reference signal; The energy information of the first reference signal generates a frequency domain signal of the first reference signal; and converts the frequency domain signal of the first reference signal into a time domain signal.
  • the method for obtaining the frequency domain density of the first reference signal may be: determining a frequency domain interval for transmitting the CRS signal, based on a frequency of the CRS signal, when the first reference signal is a CRS signal.
  • the domain interval determines the frequency domain density of the CRS signal.
  • the frequency domain interval of the CRS signal is extended to 12 subcarriers, that is, each There are 1 CRS resource element (RE, Resource Element) in 12 subcarriers.
  • the first OFDM symbol in each resource block (RB) is set as the time domain position of the CRS.
  • only one RE resource is used for transmitting CRS signals in one RB resource block, and other RE resources are not filled with signals.
  • the signal generating unit is specifically configured to: if the bandwidth of the LAA system is 20 MHz, if the RB resource is included, 100 RE resources are used for transmitting the CRS signal, so the energy of each CRS RE resource, that is, the EPRE (Energy Per) is determined.
  • RE) [dB] P [dB] - 10 * log 10 (100), where P is the transmit power of the transmitting network device, such as the LAA base station or the LAA terminal.
  • the power of each CRS RE is EPRE, because the CRS RE in the 3GPP protocol is a normalized QPSK, so the amplitude information of the CRS RE needs to be clear when actually transmitting, and the standard generally passes the EPRE. Provision is made; thus, the energy of these CRS RE signals can be made to reach the transmission power, and the coverage is maintained.
  • CRS frequency domain signal generation method the specific process is: generating Cinit; generating a Gold sequence of length 200 according to Cinit; generating a QPSK signal by generating the Gold sequence; determining a frequency domain starting position according to the cell identifier (Cell_ID);
  • the CRS time domain signal is generated after the inverse transform (IFFT), as shown in FIG.
  • the signal generating unit in the embodiment is specifically configured to determine a time-frequency resource location of the target channel, and may be: determining that a time domain location of the target channel is before a time domain location of the synchronization channel or the auxiliary synchronization channel; Determining the frequency domain location of the target channel is the full bandwidth.
  • the location of the target channel may be adjacent to the synchronization channel and before the synchronization channel.
  • the setting unit is specifically configured to determine, according to a time-frequency resource location of the target channel,
  • the transmission mode of the CCA signal generates the CCA signal based on a transmission mode of the CCA signal and a time domain signal of the first reference signal.
  • the setting unit is specifically configured to determine that the CCA signal is sent once for each preset number of subcarriers in the frequency domain; and when the CCA signal is sent, the first duration is determined based on the sending moment of the CCA signal. ;
  • a transmission mode of the CCA signal is a first transmission mode, where the first transmission mode is to send the CCA signal only in the first duration;
  • the first duration is less than the preset threshold, determining that the transmission mode of the CCA signal is a second transmission mode, and the second transmission mode is within the first duration and time domain
  • the CCA signal is transmitted within the next complete OFDM symbol of the neighbor and within the cyclic prefix.
  • the preset threshold may be a duration of one-half of an OFDM symbol.
  • the manner of the transmission time of the target channel in the time domain may be: the target channel is an unlicensed channel, the target channel and the authorized channel operate in a carrier aggregation manner, and the target channel and the authorized channel are The time synchronization is performed. Therefore, after the LAA system obtains the channel usage right of the target channel, it knows that the CCA signal is at the time of transmitting the target channel, that is, the time domain position of the target channel is known.
  • the first duration is: starting from a sending moment of the CCA signal, starting a starting point of a next complete OFDM symbol adjacent in the time domain, and ending at the starting point to the ending point
  • the length of time is the first time.
  • the setting unit is specifically configured to: when the transmission mode of the CCA signal is the first transmission mode, set a duration of the time domain signal of the first reference signal to a first duration to obtain a CCA signal;
  • the transmission mode of the CCA signal is the second transmission mode
  • the transmission mode of the CCA signal is the first transmission mode
  • the first duration that is, the partial OFDM symbol duration, as shown in FIG. 5
  • 1/2 OFDM duration so the CCA signal is transmitted in the first duration, and the CCA signal is generated.
  • the time domain diagram is as shown in FIG. 6, that is, the first reference signal described in FIG. 3 is intercepted according to the first duration, and a CCA signal smaller than one OFDM symbol length is obtained.
  • the time-frequency diagram of the LAA transmission signal is shown in FIG. 3, and other signals, such as a synchronization signal or a secondary synchronization channel, are transmitted in the next OFDM symbol.
  • the first duration that is, the partial OFDM symbol duration is less than 1/2 OFDM duration, and therefore the next one in the first duration and the time domain is adjacent.
  • the first reference signal is cyclically repeated to obtain a CCA signal, and the time domain diagram of the specific CCA signal is as shown in FIG. 8.
  • the time-frequency diagram of the LAA transmission signal is shown in FIG. 9, and the synchronization channel or the secondary synchronization channel is transmitted in the next OFDM symbol.
  • the first reference signal can be generated, after determining the target channel to be occupied by the LAA system, generating a CCA signal based on the first reference signal, and mapping the CCA signal to the target channel and transmitting the signal to the receiving end network device;
  • the special CCA signal can be used to effectively identify the channel occupied by the LAA system, so that the receiving network device can quickly identify the channel occupied by the LAA system and improve the user experience of using the LAA system.
  • the embodiment of the invention provides a network device at the transmitting end, as shown in FIG. 13, which includes:
  • the signal generating unit 1301 is configured to generate the first reference signal based on a frequency domain density of the first reference signal and an energy value of the first reference signal on the time-frequency resource;
  • a setting unit 1302 configured to determine a time-frequency resource location of the target channel, where the target channel is used to carry information for permitting access to the LAA system; based on the time of the target channel a frequency resource location, and the first reference signal generates a CCA signal;
  • a sending unit 1303, configured to map the CCA signal to the target channel, and send the CCA signal to the receiving network device by using the target channel, so that the receiving network device identifies the according to the CCA signal. Whether the target channel is used in the LAA system.
  • the first reference signal may be a cell reference signal (CRS, Cell-references Signal).
  • CRS Cell-references Signal
  • the sender network device may be a base station or a terminal with an LAA function.
  • the signal generating unit 1301 is configured to acquire a frequency domain density of the first reference signal, and determine energy information of the first reference signal based on a frequency domain density of the first reference signal; The energy information of the first reference signal generates a frequency domain signal of the first reference signal; and converts the frequency domain signal of the first reference signal into a time domain signal.
  • the method for obtaining the frequency domain density of the first reference signal may be: determining a frequency domain interval for transmitting the CRS signal, based on a frequency of the CRS signal, when the first reference signal is a CRS signal.
  • the domain interval determines the frequency domain density of the CRS signal.
  • the frequency domain interval of the CRS signal is extended to 12 subcarriers, that is, there are one CRS resource element (RE, Resource Element) in every 12 subcarriers.
  • the first OFDM symbol in each resource block (RB) is set as the time domain position of the CRS.
  • only one RE resource is used for transmitting CRS signals in one RB resource block, and other RE resources are not filled with signals.
  • the power of each CRS RE is EPRE, because the CRS RE in the 3GPP protocol is a normalized QPSK, so when actually The amplitude information of the CRS RE needs to be clarified when sending, and the standard is generally specified by the EPRE; thus, the energy of these CRS RE signals can be achieved to achieve the transmission power and maintain the coverage.
  • CRS frequency domain signal generation method the specific process is: generating Cinit; generating a Gold sequence of length 200 according to Cinit; generating a QPSK signal by generating the Gold sequence; determining a frequency domain starting position according to the cell identifier (Cell_ID);
  • the CRS time domain signal is generated after the inverse transform (IFFT), as shown in FIG.
  • the signal generating unit 1301 is configured to determine that the time domain location of the target channel is before the time domain location of the synchronization channel or the secondary synchronization channel; and determine that the frequency domain location of the target channel is the entire bandwidth.
  • the location of the target channel may be adjacent to the synchronization channel and before the synchronization channel.
  • Sending the CCA signal before the synchronization channel can avoid the hysteresis caused by indirectly identifying the channel occupied by the LAA through the synchronization channel or the auxiliary synchronization channel; and, the solution can directly determine the time domain feature of the CRS signal, and does not need to The receiver decodes the processing so that the recognition speed can be guaranteed.
  • the manner of the transmission time of the target channel in the time domain may be: the target channel is an unlicensed channel, the target channel and the authorized channel operate in a carrier aggregation manner, and the target channel and the authorized channel are The time synchronization is performed. Therefore, after the LAA system obtains the channel usage right of the target channel, it knows that the CCA signal is at the time of transmitting the target channel, that is, the time domain position of the target channel is known.
  • the setting unit is specifically configured to determine that the CCA signal is sent once for each preset number of subcarriers in the frequency domain; wherein the predetermined number may be set according to an actual situation, for example, according to a frequency domain density of the first reference signal.
  • the setting may be sent once every 12 subcarriers in this embodiment;
  • Obtaining a transmission moment of the CCA signal determining, in the time domain, a first duration based on a transmission time based on the CCA signal; and performing, at the first duration, a next complete OFDM adjacent in a time domain
  • the termination time of the symbol is used as the termination point as the transmission duration of the CCA signal, and the time domain signal of the first reference signal is circulated based on the transmission duration to obtain a CCA signal.
  • the preset threshold may be a duration of one-half of an OFDM symbol.
  • the first duration that is, the partial OFDM symbol duration is less than 1/2 OFDM duration, and therefore, in the first duration and the next OFDM adjacent to the time domain and the cyclic prefix length of the OFDM symbol,
  • the first reference signal is cyclically repeated to obtain a CCA signal, and a time domain diagram of a specific CCA signal is shown in FIG.
  • the time-frequency diagram of the LAA transmission signal is shown in FIG. 11, and the synchronization channel or the secondary synchronization channel is transmitted in the next OFDM symbol.
  • the first reference signal can be generated, after determining the target channel to be occupied by the LAA system, generating a CCA signal based on the first reference signal, and mapping the CCA signal to the target channel and transmitting the signal to the receiving end network device;
  • the special CCA signal can be used to effectively identify the channel occupied by the LAA system, so that the receiving network device can quickly identify the channel occupied by the LAA system and improve the user experience of using the LAA system.
  • An embodiment of the present invention provides a network device applied to a receiving end, as shown in FIG. 14, which includes:
  • the signal processing unit 1402 is configured to identify, according to the preset first reference signal, whether the CCA signal is carried in the target channel; if the target channel carries a CCA signal, determine the location The target channel is used to transmit information of the LAA system.
  • the first reference signal may be a time domain signal of a CRS signal preset in the receiving end network device.
  • the receiving end network device may be a base station or a terminal with an LAA function.
  • the signal processing unit 1402 is configured to perform a sliding cross-correlation process on the 1/4 OFDM symbol of the time domain signal of the first reference signal with the received signal, and the sliding interval is 1/4 OFDM symbol, if the duration of the two OFDM symbols is There are at least two detection peaks that meet predetermined conditions, and the target channel is occupied by the LAA system.
  • the predetermined condition may be that the difference between the detected peaks is less than a threshold, for example, may be less than 0.1.
  • the target channel is occupied by the LAA system, and subsequent processing is performed according to an operation procedure of the LAA system.
  • the manner in which the first reference signal is preset in the embodiment may be pre-inputted by the administrator, or may be calculated, for example, the signal processing unit 1402 is configured to obtain the frequency domain density of the first reference signal. Determining energy information of the first reference signal based on a frequency domain density of the first reference signal; generating a frequency domain signal of the first reference signal based on energy information of the first reference signal; The frequency domain signal of a reference signal is converted into a time domain signal.
  • the method for obtaining the frequency domain density of the first reference signal may be: determining a frequency domain interval for transmitting the CRS signal, based on a frequency of the CRS signal, when the first reference signal is a CRS signal.
  • the domain interval determines the frequency domain density of the CRS signal.
  • the frequency domain interval of the CRS signal is extended to 12 subcarriers, that is, there are one CRS resource element (RE, Resource Element) in every 12 subcarriers.
  • the first OFDM symbol in each resource block (RB) is set as the time domain position of the CRS. As shown in FIG. 3, only one RE resource is used for transmission in one RB resource block. CRS signal, other RE resources do not fill the signal.
  • the power of each CRS RE is EPRE, because the CRS RE in the 3GPP protocol is a normalized QPSK, so the amplitude information of the CRS RE needs to be clear when actually transmitting, and the standard generally passes the EPRE. Provision is made; thus, the energy of these CRS RE signals can be made to reach the transmission power, and the coverage is maintained.
  • CRS frequency domain signal generation method the specific process is: generating Cinit; generating a Gold sequence of length 200 according to Cinit; generating a QPSK signal by generating the Gold sequence; determining a frequency domain starting position according to the cell identifier (Cell_ID);
  • the CRS time domain signal is generated after the inverse transform (IFFT), as shown in FIG.
  • the first reference signal can be generated, after determining the target channel to be occupied by the LAA system, generating a CCA signal based on the first reference signal, and mapping the CCA signal to the target channel and transmitting the signal to the receiving end network device;
  • the special CCA signal can be used to effectively identify the channel occupied by the LAA system, so that the receiving network device can quickly identify the channel occupied by the LAA system and improve the user experience of using the LAA system.
  • This embodiment provides a signal processing system, as described in FIG. 15, including:
  • the transmitting end network device 1501 is configured to generate the first reference signal based on a frequency domain density of the first reference signal and an energy value of the first reference signal on the time-frequency resource; and determine a time-frequency resource location of the target channel;
  • the target channel is used to carry information of the LAA system;
  • the CCA signal is generated based on the time-frequency resource location of the target channel and the first reference signal, and the CCA signal is mapped to the target channel. Transmitting, by the target channel, the CCA signal to a receiving network device;
  • a receiving end network device 1502 configured to access a target channel; identify, according to the preset first reference signal, whether the CCA signal is carried in the target channel; if the target channel carries a CCA signal, determine that the target channel is used to Transfer information from the LAA system
  • the functional units of the transmitting end network device and the receiving end network device in this embodiment are the same as those in the fourth embodiment to the sixth embodiment, and are not described herein.
  • the first reference signal can be generated, after determining the target channel to be occupied by the LAA system, generating a CCA signal based on the first reference signal, and mapping the CCA signal to the target channel and transmitting the signal to the receiving end network device;
  • the special CCA signal can be used to effectively identify the channel occupied by the LAA system, so that the receiving network device can quickly identify the channel occupied by the LAA system and improve the user experience of using the LAA system.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the above integration
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing storage device includes the following steps: the foregoing storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or an optical disk.
  • optical disk A medium that can store program code.
  • the embodiment of the invention discloses a signal processing method, a network device and a system, wherein the method comprises: generating a first reference signal, determining a target channel to be occupied by the LAA system, generating a CCA signal based on the first reference signal, and generating a CCA signal
  • the signal is mapped to the target channel and sent to the receiving network device.
  • the channel occupied by the LAA system can be effectively identified by setting a special CCA signal, so that the receiving network device can quickly identify the channel occupied by the LAA system and enhance the user. Use the experience of the LAA system.

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Abstract

本发明公开了一种信号处理方法、网络设备及***,其中方法包括:基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,经过IFFT处理生成所述第一参考信号;确定目标信道的时频资源位置;其中,所述目标信道用于承载授权辅助访问(LAA)***的信息;基于所述目标信道的时频资源位置、以及所述第一参考信号生成空闲信道评估(CCA)信号,将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备,以使得所述接收端网络设备根据所述CCA信号识别所述目标信道是否用于LAA***。

Description

一种信号处理方法、网络设备、***及计算机存储介质 技术领域
本发明涉及通信领域的信道处理技术,尤其涉及一种信号处理方法、网络设备、***及计算机存储介质。
背景技术
近年来,随着移动互联网的迅猛发展,移动用户对于***容量要求不断增大,并且呈现出指数增长趋势。由于非授权频谱的使用特性,即多套***或者多个设备需要竞争获得信道使用权限,***间或设备间时分共享信道使用权限。当授权辅助访问(LAA,Licensed Assisted Access)基站获得信道使用权限后,可能出现由于信号发送起始时间点位于子帧中间位置,尤其是信号发送起始时间点位于OFDM符号中间位置,会出现无法有效的标识信道被LAA***占用,进而无法使得对端快速的识别被LAA***占用的信道,影响了用户使用LAA***的使用体验。
发明内容
有鉴于此,本发明实施例提供一种信号处理方法、网络设备、***及计算机存储介质,能至少解决现有技术中存在的上述问题。
为达到上述目的,本发明的技术方案是这样实现的:
本发明实施例提供了一种信号处理方法,应用于发送端网络设备,所述方法包括:
基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;
确定目标信道的时频资源位置;其中,所述目标信道用于承载授权 辅助访问LAA***的信息;
基于所述目标信道的时频资源位置、以及所述第一参考信号生成空闲信道评估CCA信号,将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备,以使得所述接收端网络设备根据所述CCA信号识别所述目标信道是否用于LAA***。
上述方案中,基于所述第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号,包括:
获取到所述第一参考信号的频域密度;
基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;
基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;
将所述第一参考信号的频域信号转换为时域信号。
上述方案中,所述基于所述目标信道的时频资源位置、以及所述第一参考信号生成所述CCA信号,包括:
基于所述目标信道的时频资源位置,确定CCA信号的发送模式,基于所述CCA信号的发送模式、以及所述第一参考信号的时域信号生成所述CCA信号。
上述方案中,所述基于所述目标信道的时频资源位置,确定CCA信号的发送模式,包括:
确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,基于所述CCA信号的发送时刻,确定第一时长;
当所述第一时长大于等于预设门限值时,确定所述CCA信号的发送模式为第一发送模式,所述第一发送模式为仅在所述第一时长内发送所 述CCA信号;
当所述第一时长小于所述预设门限值时,确定所述CCA信号的发送模式为第二发送模式,所述第二发送模式为在所述第一时长、时域上相邻的下一个完整的OFDM符号以及所述OFDM符号的循环前缀长度内发送所述CCA信号。
上述方案中,所述基于所述CCA信号的发送模式、以及所述第一参考信号的时域信号生成所述CCA信号,包括:
当所述CCA信号的发送模式为第一发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长得到CCA信号;
当所述CCA信号的发送模式为第二发送模式时,将所述第一参考信号的时域信号的时长设置为等于第一时长加一个完整OFDM符号时长再加所述OFDM符号的循环前缀长度得到CCA信号。
上述方案中,所述基于所述目标信道的时频资源位置、以及所述第一参考信号生成所述CCA信号,包括:
确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,在时域上以基于所述CCA信号的发送时刻为起始点,确定第一时长;将所述第一时长、加以时域上相邻的下一个完整的OFDM符号再加所述OFDM符号的循环前缀长度作为所述CCA信号的发送时长,基于所述发送时长将所述第一参考信号的时域信号进行循环得到CCA信号。
本发明实施例提供了一种信号处理方法,应用于接收端网络设备,所述方法包括:
接入目标信道;
基于预设的第一参考信号识别所述目标信道中是否承载CCA信号;
若所述目标信道中承载CCA信号,则确定所述目标信道用于传输 LAA***的信息。
上述方案中,所述基于预设的第一参考信号识别所述目标信道中是否承载CCA信号,包括:通过第一参考信号的时域信号的1/4OFDM符号与接收信号进行滑动互相关处理,滑动间隔为1/4OFDM符号,如果在两个OFDM符号时间长度内,存在至少两个符合预设条件的检测峰值,则所述目标信道被LAA***所占用。
本发明实施例提供了一种发送端网络设备,包括:
信号生成单元,配置为基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;
设置单元,配置为确定目标信道的时频资源位置;其中,所述目标信道用于承载授权辅助访问LAA***的信息;基于所述目标信道的时频资源位置、以及所述第一参考信号生成CCA信号;
发送单元,配置为将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备,以使得所述接收端网络设备根据所述CCA信号识别所述目标信道是否用于LAA***。
上述方案中,所述信号生成单元,配置为获取到所述第一参考信号的频域密度;基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;将所述第一参考信号的频域信号转换为时域信号。
上述方案中,所述设置单元,配置为基于所述目标信道的时频资源位置,确定CCA信号的发送模式,基于所述CCA信号的发送模式、以及所述第一参考信号的时域信号生成所述CCA信号。
上述方案中,所述设置单元,配置为确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,基于所述CCA信号的发送时刻,确定第一时长;当所述第一时长大于等于预设门 限值时,确定所述CCA信号的发送模式为第一发送模式,所述第一发送模式为仅在所述第一时长内发送所述CCA信号;当所述第一时长小于所述预设门限值时,确定所述CCA信号的发送模式为第二发送模式,所述第二发送模式为在所述第一时长、时域上相邻的下一个完整的OFDM符号以及所述OFDM符号的循环前缀长度内发送所述CCA信号。
上述方案中,所述设置单元,配置为当所述CCA信号的发送模式为第一发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长得到CCA信号;当所述CCA信号的发送模式为第二发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长加一个完整OFDM符号时长加所述OFDM符号的循环前缀长度,最后得到CCA信号。
上述方案中,所述设置单元,配置为确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,在时域上以基于所述CCA信号的发送时刻为起始点,确定第一时长;将所述第一时长、加以时域上相邻的下一个完整的OFDM符号再加所述OFDM符号的循环前缀长度作为所述CCA信号的发送时长,基于所述发送时长将所述第一参考信号的时域信号进行循环得到CCA信号。
本发明实施例还提供了一种接收端网络设备,包括:
接收单元,配置为接入目标信道;
信号处理单元,配置为基于预设的第一参考信号识别所述目标信道中是否承载CCA信号;若所述目标信道中承载CCA信号,则确定所述目标信道用于传输LAA***的信息。
上述方案中,所述信号处理单元,配置为通过第一参考信号的时域信号的1/4 OFDM符号与接收信号进行滑动互相关处理,滑动间隔为1/4OFDM符号,如果在两个OFDM符号时间长度内,存在至少两个符合预设条件的检测峰值,则所述目标信道被LAA***所占用。
本发明实施例提供了一种信号处理***,所述***包括:
发送端网络设备,配置为基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;确定目标信道的时频资源位置;其中,所述目标信道用于承载LAA***的信息;基于所述目标信道的时频资源位置、以及所述第一参考信号生成CCA信号,将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备;
接收端网络设备,配置为接入目标信道;基于预设的第一参考信号识别所述目标信道中是否承载CCA信号;若所述目标信道中承载CCA信号,则确定所述目标信道用于传输LAA***的信息。
本发明实施例提供了一种计算机存储介质,所述计算机存储介质中存储有计算机可执行指令,所述计算机可执行指令用于执行上述信号处理方法。
本发明所提供的信号处理方法、网络设备及***,通过采用上述方案,生成第一参考信号,确定LAA***所要占用的目标信道之后,基于第一参考信号生成CCA信号,并将CCA信号映射至目标信道发送给接收端网络设备;如此,能够通过设置特殊的CCA信号来有效的标识LAA***所占用的信道,使得接收端网络设备能够快速的识别被LAA***占用的信道,提升用户使用LAA***的使用体验。
附图说明
图1为本发明实施例信号处理方法的发送端流程示意图;
图2为本发明实施例生成第一参考信号流程示意图;
图3为本发明实施例信号时频资源结构示意图一;
图4为本发明实施例第一参考信号时域信号示意图;
图5为本发明实施例CCA信号示意图一;
图6为本发明实施例CCA信号示意图二;
图7为本发明实施例CCA信号示意图三;
图8为本发明实施例CCA信号示意图四;
图9为本发明实施例信号时频资源结构示意图二;
图10为本发明实施例CCA信号示意图五;
图11为本发明实施例CCA信号示意图六;
图12为本发明实施例信号处理方法接收端流程示意图;
图13为本发明实施例发送端网络设备组成结构示意图;
图14为本发明实施例接收端网络设备组成结构示意图;
图15为本发明实施例信号处理***组成结构示意图。
具体实施方式
实施例一、
本发明实施例提供了一种信号处理方法,应用于发送端网络设备,如图1所示,所述方法包括:
步骤101:基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;
步骤102:确定目标信道的时频资源位置;其中,所述目标信道用于承载授权辅助访问(LAA)***的信息;
步骤103:基于所述目标信道的时频资源位置、以及所述第一参考信号生成所述CCA信号,将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备,以使得所述接收端网络设备根据所述CCA信号识别所述目标信道是否用于LAA***。
这里,所述第一参考信号可以为小区参考信号(CRS,Cell-references Signal)。
所述发送端网络设备可以为具备LAA功能的基站或者终端。
优选地,上述步骤101,如图2所示,基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号可以包括以下操作:
步骤201:获取到所述第一参考信号的频域密度;
步骤202:基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;
步骤203:基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;
步骤204:将所述第一参考信号的频域信号转换为时域信号。
其中,当所述第一参考信号为CRS信号,所述获取到所述第一参考信号的频域密度的方式可以为:确定传输所述CRS信号的频域间隔,基于所述CRS信号的频域间隔确定所述CRS信号的频域密度。
比如,本发明中将CRS信号的频域间隔扩展为12个子载波,即每12个子载波(subcarrier)中有1个CRS资源元素(RE,Resource Element)。本实施例中设置每个资源块(RB)中第一个OFDM符号作为CRS的时域位置。如图3所示,在一个RB资源块中仅有1个RE资源用于传输CRS信号,其他RE资源不填充信号。
所述基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息,可以包括:如果LAA***带宽为20MHz,则包含100个RB资源,则共有100个RE资源用于传输CRS信号,因此确定每个CRS RE资源的能量,即EPRE(Energy Per RE)[dB]=P[dB]-10*log10(100),其中P为发送端网络设备,比如LAA基站或者LAA终端的发送功率。另外,本实施例中,每个CRS RE的功率即为EPRE,因为3GPP协议中CRS RE是归1化的QPSK,因此当实际发送时需要明确CRS RE的幅值信息,标准中一般就通过EPRE进行规定;从而能够使得这些CRS  RE信号能量能够达到发送功率,维持覆盖范围。
所述生成所述第一参考信号的频域信号的方法,可以为根据传统LTE CRS信号生成方式生成频域信号,其长度为100个RE资源,同时根据cell ID确定CRS RE的起始位置,shift=mod(cell_ID,12);
CRS频域信号生成方式,流程为:生成Cinit;根据Cinit生成长度为200的Gold序列;将生成的Gold序列生成QPSK信号;根据小区标识(Cell_ID)确定频域起始位置;经过傅里叶反变换(IFFT)后生成CRS时域信号,如图4所示。
优选地,本实施例中所述确定目标信道的时频资源位置,可以为:确定所述目标信道的时域位置为同步信道或辅助同步信道的时域位置之前;确定所述目标信道的频域位置为全部带宽。所述目标信道的位置可以为与所述同步信道相邻、且在所述同步信道之前。另外,还由于在同步信道之前发送该CCA信号,能够避免通过同步信道或辅助同步信道来间接识别LAA占用的信道而导致的滞后现象;并且,本方案由于可以直接利用CRS信号的时域特征进行判断,不需要接收机译码处理,因此能够保证识别速度。
更进一步地,获知所述目标信道在时域上的发送时刻的方式可以为:目标信道为非授权信道,该目标信道和授权信道以载波聚合方式工作,所述目标信道与所述授权信道之间时间同步,因此LAA***在目标信道获得信道使用权限后,就知道了CCA信号在目标信道发送时刻,即获知了目标信道的时域位置。
所述基于所述目标信道的时频资源位置、以及所述第一参考信号生成所述CCA信号,可以包括:基于所述目标信道的时频资源位置,确定CCA信号的发送模式,基于所述CCA信号的发送模式、以及所述第一参考信号的时域信号生成所述CCA信号。
其中,基于所述目标信道的时频资源位置,确定CCA信号的发送模式,可以包括:确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,基于所述CCA信号的发送时刻,确定第一时长;
当所述第一时长大于等于预设门限值时,确定所述CCA信号的发送模式为第一发送模式,所述第一发送模式为仅在所述第一时长内发送所述CCA信号;当所述第一时长小于所述预设门限值时,确定所述CCA信号的发送模式为第二发送模式,所述第二发送模式为在所述第一时长内、以及时域上相邻的下一个完整的OFDM符号以及所述OFDM符号的循环前缀长度内发送所述CCA信号。其中,所述预设门限值可以为二分之一个OFDM符号的时长。其中,所述OFDM符号的循环前缀为时域上在OFDM符号之前的前缀。
所述第一时长为:以所述CCA信号的发送时刻为起始点,以时域上相邻的下一个完整的OFDM符号的开始时刻为终止点,在所述起始点至所述终止点之间的时长为第一时长。
本实施例中所述基于所述CCA信号的发送模式、以及所述第一参考信号的时域信号生成所述CCA信号,可以包括:当所述CCA信号的发送模式为第一发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长得到CCA信号;
当所述CCA信号的发送模式为第二发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长加一个完整OFDM符号时长加所述OFDM符号的循环前缀,最后得到CCA信号。
比如,当所述CCA信号的发送模式为第一发送模式时,如图5所示第一时长即部分OFDM符号时长,大于1/2 OFDM时长,因此在该第一时长中发射CCA信号,CCA信号时域示意图如图6所示,也就是将图 3中所述的第一参考信号按照第一时长进行截取,得到小于一个OFDM符号长度的CCA信号。LAA发送信号时频示意图如图3所示,在下一个OFDM符号发送其他信号,比如同步信号或辅助同步信道。另外可以有效利用部分OFDM发送具有结构特征的CRS信号,有效利用了这部分发送时间。
当所述CCA信号的发送模式为第二发送模式时,如图7所示,第一时长即部分OFDM符号时长小于1/2 OFDM时长,因此在该第一时长和时域上相邻的下一个OFDM以及所述OFDM符号的循环前缀长度中,将第一参考信号进行循环重复,得到CCA信号,具体CCA信号时域示意图如图8所示。LAA发送信号时频示意图如图9所示,在下下一个OFDM符号发送同步信道或辅助同步信道。
可见,通过采用上述方案,生成第一参考信号,确定LAA***所要占用的目标信道之后,基于第一参考信号生成CCA信号,并将CCA信号映射至目标信道发送给接收端网络设备;如此,能够通过设置特殊的CCA信号来有效的标识LAA***所占用的信道,使得接收端网络设备能够快速的识别被LAA***占用的信道,提升用户使用LAA***的使用体验。
实施例二、
本发明实施例提供了一种信号处理方法,应用于发送端网络设备,如图1所示,所述方法包括:
步骤101:基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;
步骤102:确定目标信道的时频资源位置;其中,所述目标信道用于承载授权辅助访问(LAA)***的信息;
步骤103:基于所述目标信道的时频资源位置、以及所述第一参考 信号生成所述CCA信号,将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备,以使得所述接收端网络设备根据所述CCA信号识别所述目标信道是否用于LAA***。
这里,所述第一参考信号可以为小区参考信号(CRS,Cell-references Signal)。
所述发送端网络设备可以为具备LAA功能的基站或者终端。
优选地,上述步骤101,如图2所示,可以包括以下操作:
步骤201:获取到所述第一参考信号的频域密度;
步骤202:基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;
步骤203:基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;
步骤204:将所述第一参考信号的频域信号转换为时域信号。
其中,当所述第一参考信号为CRS信号,所述获取到所述第一参考信号的频域密度的方式可以为:确定传输所述CRS信号的频域间隔,基于所述CRS信号的频域间隔确定所述CRS信号的频域密度。
比如,本发明中将CRS信号的频域间隔扩展为12个子载波,即每12个子载波(subcarrier)中有1个CRS资源元素(RE,Resource Element)。本实施例中设置每个资源块(RB)中第一个OFDM符号作为CRS的时域位置。如图3所示,在一个RB资源块中仅有1个RE资源用于传输CRS信号,其他RE资源不填充信号。
所述基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息,可以包括:如果LAA***带宽为20MHz,则包含100个RB资源,则共有100个RE资源用于传输CRS信号,因此确定每个CRS RE资源的能量,即EPRE(Energy Per RE)[dB]=P[dB]-10*log10(100), 其中P为发送端网络设备,比如LAA基站或者LAA终端的发送功率。另外,本实施例中,每个CRS RE的功率即为EPRE,因为3GPP协议中CRS RE是归1化的QPSK,因此当实际发送时需要明确CRS RE的幅值信息,标准中一般就通过EPRE进行规定;从而能够使得这些CRS RE信号能量能够达到发送功率,维持覆盖范围。
所述生成所述第一参考信号的频域信号的方法,可以为根据传统LTE CRS信号生成方式生成频域信号,其长度为100个RE资源,同时根据cell ID确定CRS RE的起始位置,shift=mod(cell_ID,12);
CRS频域信号生成方式,具体流程为:生成Cinit;根据Cinit生成长度为200的Gold序列;将生成的Gold序列生成QPSK信号;根据小区标识(Cell_ID)确定频域起始位置;经过傅里叶反变换(IFFT)后生成CRS时域信号,如图4所示。
优选地,本实施例中所述确定目标信道的时频资源位置,可以为:确定所述目标信道的时域位置为同步信道或辅助同步信道的时域位置之前;确定所述目标信道的频域位置为全部带宽。所述目标信道的位置可以为与所述同步信道相邻、且在所述同步信道之前。
另外,还由于在同步信道之前发送该CCA信号,能够避免通过同步信道或辅助同步信道来间接识别LAA占用的信道而导致的滞后现象;并且,本方案由于可以直接利用CRS信号的时域特征进行判断,不需要接收机译码处理,因此能够保证识别速度。
更进一步地,获知所述目标信道在时域上的发送时刻的方式可以为:目标信道为非授权信道,该目标信道和授权信道以载波聚合方式工作,所述目标信道与所述授权信道之间时间同步,因此LAA***在目标信道获得信道使用权限后,就知道了CCA信号在目标信道发送时刻,即获知了目标信道的时域位置。
所述基于所述目标信道的时频资源位置、以及所述第一参考信号生成所述CCA信号,可以包括:确定所述CCA信号在频域上为每预设数量个子载波发送一次;其中,预定数量可以为根据实际情况设置,比如可以根据第一参考信号的频域密度进行设置,本实施例中可以为每12个子载波发送一次;
获取到CCA信号的发送时刻,在时域上以基于所述CCA信号的发送时刻为起始点,确定第一时长;将所述第一时长、加以时域上相邻的下一个完整的OFDM符号再加所述OFDM符号的循环前缀长度作为所述CCA信号的发送时长,基于所述发送时长将所述第一参考信号的时域信号进行循环得到CCA信号。
其中,所述预设门限值可以为二分之一个OFDM符号的时长。
比如,如图7所示,第一时长即部分OFDM符号时长小于1/2OFDM时长,因此在该第一时长和时域上相邻的下一个OFDM以及所述OFDM符号的循环前缀长度中,将第一参考信号进行循环重复,得到CCA信号,具体CCA信号时域示意图如图10所示。LAA发送信号时频示意图如图11所示,在下下一个OFDM符号发送同步信道或辅助同步信道。可以有效利用部分OFDM发送具有结构特征的CRS信号,有效利用了这部分发送时间。
可见,通过采用上述方案,就能够生成第一参考信号,确定LAA***所要占用的目标信道之后,基于第一参考信号生成CCA信号,并将CCA信号映射至目标信道发送给接收端网络设备;如此,能够通过设置特殊的CCA信号来有效的标识LAA***所占用的信道,使得接收端网络设备能够快速的识别被LAA***占用的信道,提升用户使用LAA***的使用体验。
实施例三、
本发明实施例提供了一种信号处理方法,应用于接收端网络设备,如图12所示,包括:
步骤1201:接入目标信道;
步骤1202:基于预设的第一参考信号识别所述目标信道中是否承载CCA信号;
步骤1203:若所述目标信道中承载CCA信号,则确定所述目标信道用于传输LAA***的信息。
这里,所述第一参考信号可以为在所述接收端网络设备中预设的CRS信号的时域信号。
所述接收端网络设备可以为具备LAA功能的基站或者终端。
所述基于预设的第一参考信号识别所述目标信道中是否承载CCA信号,可以包括:通过第一参考信号的时域信号的1/4 OFDM符号与接收信号进行滑动互相关处理,滑动间隔为1/4 OFDM符号,如果在两个OFDM符号时间长度内,存在至少两个符合预设条件的检测峰值,则所述目标信道被LAA***所占用。
其中,所述符合预设条件可以为所述检测峰值之间的的差值小于门限值,比如,可以为小于0.1。
优选地,执行完上述步骤1203之后,可以确定目标信道为LAA***所占用,则根据LAA***的操作流程进行后续处理。
本实施例中预设所述第一参考信号的方式,可以为由管理人员进行预先输入,也可以进行计算得到,比如包括:获取到所述第一参考信号的频域密度;基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;将所述第一参考信号的频域信号转换为时域信号。
其中,当所述第一参考信号为CRS信号,所述获取到所述第一参考 信号的频域密度的方式可以为:确定传输所述CRS信号的频域间隔,基于所述CRS信号的频域间隔确定所述CRS信号的频域密度。
比如,本发明中将CRS信号的频域间隔扩展为12个子载波,即每12个子载波(subcarrier)中有1个CRS资源元素(RE,Resource Element)。本实施例中设置每个资源块(RB)中第一个OFDM符号作为CRS的时域位置。如图3所示,在一个RB资源块中仅有1个RE资源用于传输CRS信号,其他RE资源不填充信号。
所述基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息,可以包括:如果LAA***带宽为20MHz,则包含100个RB资源,则共有100个RE资源用于传输CRS信号,因此确定每个CRS RE资源的能量,即EPRE(Energy Per RE)[dB]=P[dB]-10*log10(100),其中P为发送端网络设备,比如LAA基站或者LAA终端的发送功率。另外,本实施例中,每个CRS RE的功率即为EPRE,因为3GPP协议中CRS RE是归1化的QPSK,因此当实际发送时需要明确CRS RE的幅值信息,标准中一般就通过EPRE进行规定;从而能够使得这些CRS RE信号能量能够达到发送功率,维持覆盖范围。
所述生成所述第一参考信号的频域信号的方法,可以为根据传统LTE CRS信号生成方式生成频域信号,其长度为100个RE资源,同时根据cell ID确定CRS RE的起始位置,shift=mod(cell_ID,12);
CRS频域信号生成方式,具体流程为:生成Cinit;根据Cinit生成长度为200的Gold序列;将生成的Gold序列生成QPSK信号;根据小区标识(Cell_ID)确定频域起始位置;经过傅里叶反变换(IFFT)后生成CRS时域信号,如图4所示。
可见,通过采用上述方案,就能够生成第一参考信号,确定LAA***所要占用的目标信道之后,基于第一参考信号生成CCA信号,并将 CCA信号映射至目标信道发送给接收端网络设备;如此,能够通过设置特殊的CCA信号来有效的标识LAA***所占用的信道,使得接收端网络设备能够快速的识别被LAA***占用的信道,提升用户使用LAA***的使用体验。
实施例四、
本发明实施例提供了一种发送端网络设备,如图13所示,包括:
信号生成单元1301,用于基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;
设置单元1302,用于确定目标信道的时频资源位置;其中,所述目标信道用于承载LAA***的信息;基于所述目标信道的时频资源位置、以及所述第一参考信号生成CCA信号;
发送单元1303,用于将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备,以使得所述接收端网络设备根据所述CCA信号识别所述目标信道是否用于LAA***。
这里,所述第一参考信号可以为小区参考信号(CRS,Cell-references Signal)。
所述发送端网络设备可以为具备LAA功能的基站或者终端。
优选地,所述信号生成单元,具体用于获取到所述第一参考信号的频域密度;基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;将所述第一参考信号的频域信号转换为时域信号。
其中,当所述第一参考信号为CRS信号,所述获取到所述第一参考信号的频域密度的方式可以为:确定传输所述CRS信号的频域间隔,基于所述CRS信号的频域间隔确定所述CRS信号的频域密度。
比如,本发明中将CRS信号的频域间隔扩展为12个子载波,即每 12个子载波(subcarrier)中有1个CRS资源元素(RE,Resource Element)。本实施例中设置每个资源块(RB)中第一个OFDM符号作为CRS的时域位置。如图3所示,在一个RB资源块中仅有1个RE资源用于传输CRS信号,其他RE资源不填充信号。
所述信号生成单元,具体用于如果LAA***带宽为20MHz,则包含100个RB资源,则共有100个RE资源用于传输CRS信号,因此确定每个CRS RE资源的能量,即EPRE(Energy Per RE)[dB]=P[dB]-10*log10(100),其中P为发送端网络设备,比如LAA基站或者LAA终端的发送功率。另外,本实施例中,每个CRS RE的功率即为EPRE,因为3GPP协议中CRS RE是归1化的QPSK,因此当实际发送时需要明确CRS RE的幅值信息,标准中一般就通过EPRE进行规定;从而能够使得这些CRS RE信号能量能够达到发送功率,维持覆盖范围。
所述生成所述第一参考信号的频域信号的方法,可以为根据传统LTE CRS信号生成方式生成频域信号,其长度为100个RE资源,同时根据cell ID确定CRS RE的起始位置,shift=mod(cell_ID,12);
CRS频域信号生成方式,具体流程为:生成Cinit;根据Cinit生成长度为200的Gold序列;将生成的Gold序列生成QPSK信号;根据小区标识(Cell_ID)确定频域起始位置;经过傅里叶反变换(IFFT)后生成CRS时域信号,如图4所示。
优选地,本实施例中所述信号生成单元,具体用于确定目标信道的时频资源位置,可以为:确定所述目标信道的时域位置为同步信道或辅助同步信道的时域位置之前;确定所述目标信道的频域位置为全部带宽。所述目标信道的位置可以为与所述同步信道相邻、且在所述同步信道之前。
所述设置单元,具体用于基于所述目标信道的时频资源位置,确定 CCA信号的发送模式,基于所述CCA信号的发送模式、以及所述第一参考信号的时域信号生成所述CCA信号。
其中,所述设置单元,具体用于确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,基于所述CCA信号的发送时刻,确定第一时长;
当所述第一时长大于等于预设门限值时,确定所述CCA信号的发送模式为第一发送模式,所述第一发送模式为仅在所述第一时长内发送所述CCA信号;当所述第一时长小于所述预设门限值时,确定所述CCA信号的发送模式为第二发送模式,所述第二发送模式为在所述第一时长内、以及时域上相邻的下一个完整的OFDM符号以及循环前缀内发送所述CCA信号。其中,所述预设门限值可以为二分之一个OFDM符号的时长。
更进一步地,获知所述目标信道在时域上的发送时刻的方式可以为:目标信道为非授权信道,该目标信道和授权信道以载波聚合方式工作,所述目标信道与所述授权信道之间时间同步,因此LAA***在目标信道获得信道使用权限后,就知道了CCA信号在目标信道发送时刻,即获知了目标信道的时域位置。
所述第一时长为:以所述CCA信号的发送时刻为起始点,以时域上相邻的下一个完整的OFDM符号的开始时刻为终止点,在所述起始点至所述终止点之间的时长为第一时长。
本实施例中所述设置单元,具体用于当所述CCA信号的发送模式为第一发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长得到CCA信号;
当所述CCA信号的发送模式为第二发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长加一个完整OFDM符号时长以及 所述OFDM符号的循环前缀长度,得到CCA信号。
比如,当所述CCA信号的发送模式为第一发送模式时,如图5所示第一时长即部分OFDM符号时长,大于1/2OFDM时长,因此在该第一时长中发射CCA信号,CCA信号时域示意图如图6所示,也就是将图3中所述的第一参考信号按照第一时长进行截取,得到小于一个OFDM符号长度的CCA信号。LAA发送信号时频示意图如图3所示,在下一个OFDM符号发送其他信号,比如同步信号或辅助同步信道。
当所述CCA信号的发送模式为第二发送模式时,如图7所示,第一时长即部分OFDM符号时长小于1/2OFDM时长,因此在该第一时长和时域上相邻的下一个OFDM以及所述OFDM符号的循环前缀长度中,将第一参考信号进行循环重复,得到CCA信号,具体CCA信号时域示意图如图8所示。LAA发送信号时频示意图如图9所示,在下下一个OFDM符号发送同步信道或辅助同步信道。
可见,通过采用上述方案,就能够生成第一参考信号,确定LAA***所要占用的目标信道之后,基于第一参考信号生成CCA信号,并将CCA信号映射至目标信道发送给接收端网络设备;如此,能够通过设置特殊的CCA信号来有效的标识LAA***所占用的信道,使得接收端网络设备能够快速的识别被LAA***占用的信道,提升用户使用LAA***的使用体验。
实施例五、
本发明实施例提供了发送端网络设备,如图13所示,包括:
信号生成单元1301,用于基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;
设置单元1302,用于确定目标信道的时频资源位置;其中,所述目标信道用于承载许可辅助访问LAA***的信息;基于所述目标信道的时 频资源位置、以及所述第一参考信号生成CCA信号;
发送单元1303,用于将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备,以使得所述接收端网络设备根据所述CCA信号识别所述目标信道是否用于LAA***。
这里,所述第一参考信号可以为小区参考信号(CRS,Cell-references Signal)。
所述发送端网络设备可以为具备LAA功能的基站或者终端。
优选地,上述信号生成单元1301,用于获取到所述第一参考信号的频域密度;基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;将所述第一参考信号的频域信号转换为时域信号。
其中,当所述第一参考信号为CRS信号,所述获取到所述第一参考信号的频域密度的方式可以为:确定传输所述CRS信号的频域间隔,基于所述CRS信号的频域间隔确定所述CRS信号的频域密度。
比如,本发明中将CRS信号的频域间隔扩展为12个子载波,即每12个子载波(subcarrier)中有1个CRS资源元素(RE,Resource Element)。本实施例中设置每个资源块(RB)中第一个OFDM符号作为CRS的时域位置。如图3所示,在一个RB资源块中仅有1个RE资源用于传输CRS信号,其他RE资源不填充信号。
所述信号生成单元1301,用于如果LAA***带宽为20MHz,则包含100个RB资源,则共有100个RE资源用于传输CRS信号,因此确定每个CRS RE资源的能量,即EPRE(Energy Per RE)[dB]=P[dB]-10*log10(100),其中P为发送端网络设备,比如LAA基站或者LAA终端的发送功率。另外,本实施例中,每个CRS RE的功率即为EPRE,因为3GPP协议中CRS RE是归1化的QPSK,因此当实际发 送时需要明确CRS RE的幅值信息,标准中一般就通过EPRE进行规定;从而能够使得这些CRS RE信号能量能够达到发送功率,维持覆盖范围。
所述生成所述第一参考信号的频域信号的方法,可以为根据传统LTE CRS信号生成方式生成频域信号,其长度为100个RE资源,同时根据cell ID确定CRS RE的起始位置,shift=mod(cell_ID,12);
CRS频域信号生成方式,具体流程为:生成Cinit;根据Cinit生成长度为200的Gold序列;将生成的Gold序列生成QPSK信号;根据小区标识(Cell_ID)确定频域起始位置;经过傅里叶反变换(IFFT)后生成CRS时域信号,如图4所示。
优选地信号生成单元1301,用于确定所述目标信道的时域位置为同步信道或辅助同步信道的时域位置之前;确定所述目标信道的频域位置为全部带宽。所述目标信道的位置可以为与所述同步信道相邻、且在所述同步信道之前。在同步信道之前发送该CCA信号,能够避免通过同步信道或辅助同步信道来间接识别LAA占用的信道而导致的滞后现象;并且,本方案由于可以直接利用CRS信号的时域特征进行判断,不需要接收机译码处理,因此能够保证识别速度。
更进一步地,获知所述目标信道在时域上的发送时刻的方式可以为:目标信道为非授权信道,该目标信道和授权信道以载波聚合方式工作,所述目标信道与所述授权信道之间时间同步,因此LAA***在目标信道获得信道使用权限后,就知道了CCA信号在目标信道发送时刻,即获知了目标信道的时域位置。
所述设置单元,具体用于确定所述CCA信号在频域上为每预设数量个子载波发送一次;其中,预定数量可以为根据实际情况设置,比如可以根据第一参考信号的频域密度进行设置,本实施例中可以为每12个子载波发送一次;
获取到CCA信号的发送时刻,在时域上以基于所述CCA信号的发送时刻为起始点,确定第一时长;在所述第一时长、以及以时域上相邻的下一个完整的OFDM符号的终止时刻作为终止点作为所述CCA信号的发送时长,基于所述发送时长将所述第一参考信号的时域信号进行循环得到CCA信号。
其中,所述预设门限值可以为二分之一个OFDM符号的时长。
比如,如图7所示,第一时长即部分OFDM符号时长小于1/2OFDM时长,因此在该第一时长和时域上相邻的下一个OFDM和所述OFDM符号的循环前缀长度中,将第一参考信号进行循环重复,得到CCA信号,具体CCA信号时域示意图如图10所示。LAA发送信号时频示意图如图11所示,在下下一个OFDM符号发送同步信道或辅助同步信道。如此,就可以有效利用部分OFDM发送具有结构特征的CRS信号,有效利用了这部分发送时间。
可见,通过采用上述方案,就能够生成第一参考信号,确定LAA***所要占用的目标信道之后,基于第一参考信号生成CCA信号,并将CCA信号映射至目标信道发送给接收端网络设备;如此,能够通过设置特殊的CCA信号来有效的标识LAA***所占用的信道,使得接收端网络设备能够快速的识别被LAA***占用的信道,提升用户使用LAA***的使用体验。
实施例六、
本发明实施例提供了一种应用于接收端网络设备,如图14所示,包括:
接收单元1401,用于接入目标信道;
信号处理单元1402,用于基于预设的第一参考信号识别所述目标信道中是否承载CCA信号;若所述目标信道中承载CCA信号,则确定所 述目标信道用于传输LAA***的信息。
这里,所述第一参考信号可以为在所述接收端网络设备中预设的CRS信号的时域信号。
所述接收端网络设备可以为具备LAA功能的基站或者终端。
所述信号处理单元1402,用于通过第一参考信号的时域信号的1/4OFDM符号与接收信号进行滑动互相关处理,滑动间隔为1/4OFDM符号,如果在两个OFDM符号时间长度内,存在至少两个符合预设条件的检测峰值,则所述目标信道被LAA***所占用。
其中,所述符合预设条件可以为所述检测峰值之间的的差值小于门限值,比如,可以为小于0.1。
优选地,可以确定目标信道为LAA***所占用,则根据LAA***的操作流程进行后续处理。
本实施例中预设所述第一参考信号的方式,可以为由管理人员进行预先输入,也可以进行计算得到,比如信号处理单元1402,用于获取到所述第一参考信号的频域密度;基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;将所述第一参考信号的频域信号转换为时域信号。
其中,当所述第一参考信号为CRS信号,所述获取到所述第一参考信号的频域密度的方式可以为:确定传输所述CRS信号的频域间隔,基于所述CRS信号的频域间隔确定所述CRS信号的频域密度。
比如,本发明中将CRS信号的频域间隔扩展为12个子载波,即每12个子载波(subcarrier)中有1个CRS资源元素(RE,Resource Element)。本实施例中设置每个资源块(RB)中第一个OFDM符号作为CRS的时域位置。如图3所示,在一个RB资源块中仅有1个RE资源用于传输 CRS信号,其他RE资源不填充信号。
所述基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息,可以包括:如果LAA***带宽为20MHz,则包含100个RB资源,则共有100个RE资源用于传输CRS信号,因此确定每个CRS RE资源的能量,即EPRE(Energy Per RE)[dB]=P[dB]-10*log10(100),其中P为发送端网络设备,比如LAA基站或者LAA终端的发送功率。另外,本实施例中,每个CRS RE的功率即为EPRE,因为3GPP协议中CRS RE是归1化的QPSK,因此当实际发送时需要明确CRS RE的幅值信息,标准中一般就通过EPRE进行规定;从而能够使得这些CRS RE信号能量能够达到发送功率,维持覆盖范围。
所述生成所述第一参考信号的频域信号的方法,可以为根据传统LTE CRS信号生成方式生成频域信号,其长度为100个RE资源,同时根据cell ID确定CRS RE的起始位置,shift=mod(cell_ID,12);
CRS频域信号生成方式,具体流程为:生成Cinit;根据Cinit生成长度为200的Gold序列;将生成的Gold序列生成QPSK信号;根据小区标识(Cell_ID)确定频域起始位置;经过傅里叶反变换(IFFT)后生成CRS时域信号,如图4所示。
可见,通过采用上述方案,就能够生成第一参考信号,确定LAA***所要占用的目标信道之后,基于第一参考信号生成CCA信号,并将CCA信号映射至目标信道发送给接收端网络设备;如此,能够通过设置特殊的CCA信号来有效的标识LAA***所占用的信道,使得接收端网络设备能够快速的识别被LAA***占用的信道,提升用户使用LAA***的使用体验。
实施例七、
本实施例提供一种信号处理***,如图15所述,包括:
发送端网络设备1501,用于基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;确定目标信道的时频资源位置;其中,所述目标信道用于承载LAA***的信息;基于所述目标信道的时频资源位置、以及所述第一参考信号生成CCA信号,将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备;
接收端网络设备1502,用于接入目标信道;基于预设的第一参考信号识别所述目标信道中是否承载CCA信号;若所述目标信道中承载CCA信号,则确定所述目标信道用于传输LAA***的信息
本实施例中所述发送端网络设备以及接收端网络设备的功能单元与实施例四至实施例六相同,这里不做赘述。
可见,通过采用上述方案,就能够生成第一参考信号,确定LAA***所要占用的目标信道之后,基于第一参考信号生成CCA信号,并将CCA信号映射至目标信道发送给接收端网络设备;如此,能够通过设置特殊的CCA信号来有效的标识LAA***所占用的信道,使得接收端网络设备能够快速的识别被LAA***占用的信道,提升用户使用LAA***的使用体验。
在本申请所提供的几个实施例中,应该理解到,所揭露的设备和方法,可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,如:多个单元或组件可以结合,或可以集成到另一个***,或一些特征可以忽略,或不执行。另外,所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口,设备或单元的间接耦合或通信连接,可以是电性的、机械的或其它形式的。
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的,作为单元显示的部件可以是、或也可以不是物理单元,即可以位于一个地方,也可以分布到多个网络单元上;可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。
另外,在本发明各实施例中的各功能单元可以全部集成在一个处理模块中,也可以是各单元分别单独作为一个单元,也可以两个或两个以上单元集成在一个单元中;上述集成的单元既可以采用硬件的形式实现,也可以采用硬件加软件功能单元的形式实现。
本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存储介质中,该程序在执行时,执行包括上述方法实施例的步骤;而前述的存储介质包括:移动存储设备、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以所述权利要求的保护范围为准。
工业实用性
本发明实施例公开了一种信号处理方法、网络设备及***,其中,方法包括:生成第一参考信号,确定LAA***所要占用的目标信道之后,基于第一参考信号生成CCA信号,并将CCA信号映射至目标信道发送给接收端网络设备;如此,能够通过设置特殊的CCA信号来有效的标识LAA***所占用的信道,使得接收端网络设备能够快速的识别被LAA***占用的信道,提升用户使用LAA***的使用体验。

Claims (18)

  1. 一种信号处理方法,应用于发送端网络设备,所述方法包括:
    基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;
    确定目标信道的时频资源位置;其中,所述目标信道用于承载授权辅助访问LAA***的信息;
    基于所述目标信道的时频资源位置、以及所述第一参考信号生成空闲信道评估CCA信号,将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备,以使得所述接收端网络设备根据所述CCA信号识别所述目标信道是否用于LAA***。
  2. 根据权利要求1所述的方法,其中,基于所述第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号,包括:
    获取到所述第一参考信号的频域密度;
    基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;
    基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;
    将所述第一参考信号的频域信号转换为时域信号。
  3. 根据权利要求2所述的方法,其中,所述基于所述目标信道的时频资源位置、以及所述第一参考信号生成所述CCA信号,包括:
    基于所述目标信道的时频资源位置,确定CCA信号的发送模式,基于所述CCA信号的发送模式、以及所述第一参考信号的时域信号生成所述CCA信号。
  4. 根据权利要求3所述的方法,其中,所述基于所述目标信道的时频资源位置,确定CCA信号的发送模式,包括:
    确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,基于所述CCA信号的发送时刻,确定第一时长;
    当所述第一时长大于等于预设门限值时,确定所述CCA信号的发送模式为第一发送模式,所述第一发送模式为仅在所述第一时长内发送所述CCA信号;
    当所述第一时长小于所述预设门限值时,确定所述CCA信号的发送模式为第二发送模式,所述第二发送模式为在所述第一时长、时域上相邻的下一个完整的OFDM符号以及所述OFDM符号的循环前缀长度内发送所述CCA信号。
  5. 根据权利要求4所述的方法,其中,所述基于所述CCA信号的发送模式、以及所述第一参考信号的时域信号生成所述CCA信号,包括:
    当所述CCA信号的发送模式为第一发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长得到CCA信号;
    当所述CCA信号的发送模式为第二发送模式时,将所述第一参考信号的时域信号的时长设置为等于第一时长加一个完整OFDM符号时长再加所述OFDM符号的循环前缀长度得到CCA信号。
  6. 根据权利要求2所述的方法,其中,所述基于所述目标信道的时频资源位置、以及所述第一参考信号生成所述CCA信号,包括:
    确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,在时域上以基于所述CCA信号的发送时刻为起始点,确定第一时长;将所述第一时长、加以时域上相邻的下一个完整的OFDM符号再加所述OFDM符号的循环前缀长度作为所述CCA信 号的发送时长,基于所述发送时长将所述第一参考信号的时域信号进行循环得到CCA信号。
  7. 一种信号处理方法,应用于接收端网络设备,所述方法包括:
    接入目标信道;
    基于预设的第一参考信号识别所述目标信道中是否承载CCA信号;
    若所述目标信道中承载CCA信号,则确定所述目标信道用于传输LAA***的信息。
  8. 根据权利要求7所述的方法,其中,所述基于预设的第一参考信号识别所述目标信道中是否承载CCA信号,包括:通过第一参考信号的时域信号的1/4OFDM符号与接收信号进行滑动互相关处理,滑动间隔为1/4OFDM符号,如果在两个OFDM符号时间长度内,存在至少两个符合预设条件的检测峰值,则所述目标信道被LAA***所占用。
  9. 一种发送端网络设备,包括:
    信号生成单元,配置为基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;
    设置单元,配置为确定目标信道的时频资源位置;其中,所述目标信道用于承载授权辅助访问LAA***的信息;基于所述目标信道的时频资源位置、以及所述第一参考信号生成CCA信号;
    发送单元,配置为将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备,以使得所述接收端网络设备根据所述CCA信号识别所述目标信道是否用于LAA***。
  10. 根据权利要求9所述的发送端网络设备,其中,所述信号生成单元,配置为获取到所述第一参考信号的频域密度;基于所述第一参考信号的频域密度,确定所述第一参考信号的能量信息;基于所述第一参考信号的能量信息生成所述第一参考信号的频域信号;将所述第一参考 信号的频域信号转换为时域信号。
  11. 根据权利要求10所述的发送端网络设备,其中,所述设置单元,配置为基于所述目标信道的时频资源位置,确定CCA信号的发送模式,基于所述CCA信号的发送模式、以及所述第一参考信号的时域信号生成所述CCA信号。
  12. 根据权利要求11所述的发送端网络设备,其中,所述设置单元,配置为确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,基于所述CCA信号的发送时刻,确定第一时长;当所述第一时长大于等于预设门限值时,确定所述CCA信号的发送模式为第一发送模式,所述第一发送模式为仅在所述第一时长内发送所述CCA信号;当所述第一时长小于所述预设门限值时,确定所述CCA信号的发送模式为第二发送模式,所述第二发送模式为在所述第一时长、时域上相邻的下一个完整的OFDM符号以及所述OFDM符号的循环前缀长度内发送所述CCA信号。
  13. 根据权利要求12所述的发送端网络设备,其中,所述设置单元,配置为当所述CCA信号的发送模式为第一发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长得到CCA信号;当所述CCA信号的发送模式为第二发送模式时,将所述第一参考信号的时域信号的时长设置为第一时长加一个完整OFDM符号时长加所述OFDM符号的循环前缀长度,最后得到CCA信号。
  14. 根据权利要求10所述的发送端网络设备,其中,所述设置单元,配置为确定所述CCA信号在频域上为每预设数量个子载波发送一次;获取到CCA信号的发送时刻,在时域上以基于所述CCA信号的发送时刻为起始点,确定第一时长;将所述第一时长、加以时域上相邻的下一个完整的OFDM符号再加所述OFDM符号的循环前缀长度作为所述CCA 信号的发送时长,基于所述发送时长将所述第一参考信号的时域信号进行循环得到CCA信号。
  15. 一种接收端网络设备,包括:
    接收单元,配置为接入目标信道;
    信号处理单元,配置为基于预设的第一参考信号识别所述目标信道中是否承载CCA信号;若所述目标信道中承载CCA信号,则确定所述目标信道用于传输LAA***的信息。
  16. 根据权利要求15所述的接收端网络设备,其中,所述信号处理单元,配置为通过第一参考信号的时域信号的1/4OFDM符号与接收信号进行滑动互相关处理,滑动间隔为1/4OFDM符号,如果在两个OFDM符号时间长度内,存在至少两个符合预设条件的检测峰值,则所述目标信道被LAA***所占用。
  17. 一种信号处理***,所述***包括:
    发送端网络设备,配置为基于第一参考信号的频域密度以及所述第一参考信号在时频资源上的能量值,生成所述第一参考信号;确定目标信道的时频资源位置;其中,所述目标信道用于承载LAA***的信息;基于所述目标信道的时频资源位置、以及所述第一参考信号生成CCA信号,将所述CCA信号映射至所述目标信道,通过所述目标信道发送所述CCA信号至接收端网络设备;
    接收端网络设备,配置为接入目标信道;基于预设的第一参考信号识别所述目标信道中是否承载CCA信号;若所述目标信道中承载CCA信号,则确定所述目标信道用于传输LAA***的信息。
  18. 一种计算机存储介质,所述计算机存储介质中存储有计算机可执行指令,所述计算机可执行指令用于执行权利要求1或7所述的信号处理方法。
PCT/CN2015/098062 2015-05-15 2015-12-21 一种信号处理方法、网络设备、***及计算机存储介质 WO2016184097A1 (zh)

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