WO2017124770A1 - 信道检测方法、信道检测装置和终端 - Google Patents

信道检测方法、信道检测装置和终端 Download PDF

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Publication number
WO2017124770A1
WO2017124770A1 PCT/CN2016/100547 CN2016100547W WO2017124770A1 WO 2017124770 A1 WO2017124770 A1 WO 2017124770A1 CN 2016100547 W CN2016100547 W CN 2016100547W WO 2017124770 A1 WO2017124770 A1 WO 2017124770A1
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WIPO (PCT)
Prior art keywords
channel detection
frequency band
base station
uplink
unlicensed frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/CN2016/100547
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English (en)
French (fr)
Inventor
朱亚军
李明菊
张云飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Application filed by Yulong Computer Telecommunication Scientific Shenzhen Co Ltd filed Critical Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Priority to US16/071,493 priority Critical patent/US20190029047A1/en
Publication of WO2017124770A1 publication Critical patent/WO2017124770A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a channel detection method when an LTE system operates in an unlicensed frequency band, a channel detection apparatus when an LTE system operates in an unlicensed frequency band, and a terminal.
  • LAA Licensed-Assisted Access
  • the transmission of mobile communication can be carried on the unlicensed spectrum, such as the 5 GHz band.
  • these unlicensed spectrums are mainly used by Wi-Fi, Bluetooth, radar, medical and other systems.
  • LBT Listening Before Talk
  • the base station side For downlink transmission, only the base station side needs to perform the LBT operation, and the letter is detected.
  • the base station can transmit downlink data to the terminal, and the terminal side does not need to perform identification of the channel idle or not.
  • the uplink transmission is controlled by the base station. That is to say, the base station needs to send an uplink scheduling instruction to the terminal, and the terminal can perform data transmission at the corresponding location based on the indication of the uplink scheduling instruction.
  • the design of the transmission of the terminal on the unlicensed spectrum can be implemented in various ways. In the case of self-scheduling, the scheduling instruction of the uplink transmission on the unlicensed spectrum is from unauthorized. As shown in FIG.
  • the base station sends an uplink scheduling instruction to the terminal in the subframe n on the unlicensed spectrum, indicating that the terminal can transmit uplink data in the subframe n+4 on the unlicensed spectrum;
  • the scheduling instruction of the uplink transmission on the unlicensed spectrum may be sent from the authorized spectrum.
  • the base station sends an uplink scheduling instruction to the terminal in the subframe n on the licensed spectrum, indicating the terminal. Uplink data can be transmitted in subframe n+4 on the unlicensed spectrum.
  • Solution 1 The terminal makes a one-shot LBT before the uplink transmission. If the channel is idle, the channel can be accessed for uplink transmission.
  • the terminal makes an LBE-based LBT before the uplink transmission
  • Solution 3 The LBT is only performed on the base station side, and the uplink transmission is directly sent within a certain period of time after the downlink transmission ends.
  • the above solutions all have corresponding problems. Specifically, the above solution 1 affects the coexistence of other systems on the unlicensed frequency band. Since the solution 1 is relatively easy to occupy the channel, it may cause when coexisting with other systems. In the case of scenario 2, the channel environment of different terminals is different, which may result in the problem that the terminal multiplex channel cannot be transmitted, resulting in a decrease in spectrum efficiency. In the case of scheme 3, Since the terminal does not perform LBT before the terminal side performs uplink transmission, it also affects coexistence with other systems.
  • the present invention is based on at least one of the above technical problems, and proposes a new LTE system.
  • the channel detection scheme when operating in the unlicensed frequency band enables the terminal to perform a reasonable channel detection process, and realizes the coexistence of the unlicensed frequency band with other systems while ensuring the competition in the unlicensed frequency band while improving the spectrum utilization efficiency.
  • the fairness of the channel is based on at least one of the above technical problems, and proposes a new LTE system.
  • a channel detection method for an LTE system operating in an unlicensed frequency band including: receiving indication information sent by a base station; performing, on the unlicensed frequency band, based on the indication information Uplink channel detection; when it detects that the uplink channel is in an idle state, it transmits uplink data.
  • the uplink channel detection is performed on the unlicensed frequency band according to the indication information sent by the base station, so that when the base station performs the channel detection, the base station can consider the uplink multi-user multiplexing, and can instruct the terminal to perform reasonable.
  • the channel detection process realizes the coexistence of unlicensed frequency bands with other systems (such as Wi-Fi systems) while improving the efficiency of spectrum utilization, while ensuring the fairness of competing channels on unlicensed frequency bands.
  • the step of receiving the indication information sent by the base station specifically includes: receiving parameter information that the terminal sends the terminal to perform channel detection;
  • the step of performing uplink channel detection on the unlicensed frequency band based on the indication information includes: determining, according to the parameter information, a subframe position that may be used for uplink transmission, and listening to the base station at a corresponding subframe position.
  • the base station may notify the terminal of the parameter information of the channel detection by the terminal, and the terminal determines the subframe position that may be used for the uplink transmission according to the parameter information, and the terminal may monitor whether the base station sends the corresponding location. If the uplink scheduling instruction is received, the terminal may perform uplink channel detection according to the parameter information notified by the base station in advance. Specifically, after the base station informs the terminal to perform channel detection parameter information, the terminal considers that the subframe n+4 is a subframe position that may be used for uplink transmission based on the parameter information notified by the base station, and further determines that the subframe n may be sent. The uplink scheduling command may be used by the terminal to monitor whether the uplink scheduling command sent by the base station is received in the subframe n, and if received, the uplink channel detection may be performed on the subframe n+3.
  • the parameter information includes a combination of any one or more of the following: a subframe position at which the terminal performs uplink channel detection, and a symbol bit at which the terminal performs uplink channel detection. The period in which the terminal performs uplink channel detection and the CCA threshold value when the terminal performs uplink channel detection.
  • the symbol position of the terminal performing uplink channel detection is fixed, may be one or more symbols in one subframe, or one or more of the first one of the subframes. symbol.
  • the method further includes: listening, in the licensed frequency band and/or the unlicensed frequency band, an uplink scheduling instruction sent by the base station.
  • the step of receiving the indication information sent by the base station specifically includes: monitoring an uplink scheduling instruction sent by the base station; and performing, according to the indication information, an uplink channel detection step on the unlicensed frequency band, specifically The method includes: if the uplink scheduling instruction sent by the base station is monitored in any subframe, performing uplink channel detection at a position corresponding to any one of the subframes.
  • the base station does not need to notify the terminal of relevant information in advance, and the terminal can continue to monitor in the unlicensed frequency band or the licensed frequency band to determine whether to monitor the uplink scheduling instruction sent by the base station, and monitor in any subframe.
  • the terminal may perform uplink channel detection at a corresponding position on the unlicensed frequency band. Specifically, if the terminal monitors the uplink scheduling command sent by the base station in the subframe n, and the uplink scheduling instruction instructs the terminal to perform uplink transmission on the subframe n+4, the terminal may perform uplink channel detection on the subframe n+3. .
  • the method further includes: determining a location corresponding to any one of the subframes based on a predefined rule, or
  • the step of receiving the indication information sent by the base station includes: receiving an adjustment rule of the channel detection parameter sent by the base station;
  • the step of performing uplink channel detection on the unlicensed frequency band based on the indication information includes: adjusting, according to the adjustment rule, parameters of the terminal each time uplink channel detection is performed, and performing an uplink channel based on the adjusted parameter. Detection.
  • the base station can notify the terminal of the adjustment rule of the uplink channel detection parameter, and the terminal can adjust the channel detection parameter each time the uplink channel detection is performed. As in Each time channel detection is performed, the threshold value for each channel detection can be adjusted.
  • the channel detection parameter includes a combination of any one or more of the following: a CCA threshold, a subframe position of the channel detection, and a symbol position of the channel detection.
  • the step of receiving the indication information sent by the base station includes: receiving, by the base station, the radio resource control signaling, the medium access control unit signaling, or the licensed frequency band or the unlicensed frequency band.
  • the indication information sent by the physical layer signaling includes: receiving, by the base station, the radio resource control signaling, the medium access control unit signaling, or the licensed frequency band or the unlicensed frequency band.
  • a channel detecting apparatus for an LTE system operating in an unlicensed frequency band comprising: a receiving unit configured to receive indication information sent by the base station; and a channel detecting unit configured to be based on the indication The information is: performing uplink channel detection on the unlicensed frequency band; and the sending unit is configured to send the uplink data when the channel detecting unit detects that the uplink channel is in an idle state.
  • the uplink channel detection is performed on the unlicensed frequency band according to the indication information sent by the base station, so that when the base station performs the channel detection, the base station can consider the uplink multi-user multiplexing, and can instruct the terminal to perform reasonable.
  • the channel detection process realizes the coexistence of unlicensed frequency bands with other systems (such as Wi-Fi systems) while improving the efficiency of spectrum utilization, while ensuring the fairness of competing channels on unlicensed frequency bands.
  • the receiving unit is specifically configured to: receive parameter information of the terminal for channel detection sent by the base station; and the channel detecting unit is specifically configured to: determine, according to the parameter information, that it may be used for uplink transmission.
  • the subframe position is monitored, and the uplink scheduling instruction sent by the base station is monitored at the corresponding subframe position. If the uplink scheduling instruction is monitored, the uplink channel detection is performed according to the parameter information.
  • the base station may notify the terminal of the parameter information of the channel detection by the terminal, and the terminal determines the subframe position that may be used for the uplink transmission according to the parameter information, and the terminal may monitor whether the base station sends the corresponding location. If the uplink scheduling instruction is received, the terminal may perform uplink channel detection according to the parameter information notified by the base station in advance. Specifically, after the base station informs the terminal to perform channel detection parameter information, the terminal considers that the subframe n+4 is a subframe position that may be used for uplink transmission based on the parameter information notified by the base station, and further determines that the subframe n may be sent. The uplink scheduling command may be used by the terminal to monitor whether the uplink scheduling command sent by the base station is received in the subframe n, and if received, the terminal may perform uplink in the subframe n+3. Channel detection.
  • the parameter information includes a combination of any one or more of the following: a subframe position at which the terminal performs uplink channel detection, a symbol position at which the terminal performs uplink channel detection, a period in which the terminal performs uplink channel detection, and The CCA threshold value when the terminal performs uplink channel detection.
  • the channel detecting unit monitors an uplink scheduling instruction sent by the base station in a licensed frequency band and/or an unlicensed frequency band.
  • the receiving unit is specifically configured to: monitor an uplink scheduling instruction sent by the base station; and the channel detecting unit is specifically configured to: if the receiving unit monitors the base station in any subframe The uplink scheduling command sent is performed for uplink channel detection at a position corresponding to any one of the subframes.
  • the base station does not need to notify the terminal of relevant information in advance, and the terminal can continue to monitor in the unlicensed frequency band or the licensed frequency band to determine whether to monitor the uplink scheduling instruction sent by the base station, and monitor in any subframe.
  • the terminal may perform uplink channel detection at a corresponding position on the unlicensed frequency band. Specifically, if the terminal monitors the uplink scheduling command sent by the base station in the subframe n, and the uplink scheduling instruction instructs the terminal to perform uplink transmission on the subframe n+4, the terminal may perform uplink channel detection on the subframe n+3. .
  • the method further includes: a first determining unit configured to determine a location corresponding to the any subframe according to a predefined rule; or a second determining unit configured to receive the base station to send The notification information determines a location corresponding to any one of the subframes according to the notification information.
  • the receiving unit is configured to: receive an adjustment rule of a channel detection parameter sent by the base station; and the channel detection unit is specifically configured to: perform the terminal on the terminal according to the adjustment rule.
  • the parameters during uplink channel detection are adjusted, and uplink channel detection is performed based on the adjusted parameters.
  • the base station can notify the terminal of the adjustment rule of the uplink channel detection parameter, and the terminal can adjust the channel detection parameter each time the uplink channel detection is performed. For example, each time channel detection is performed, the threshold value for each channel detection can be adjusted.
  • the channel detection parameter includes any one or more of the following Combination: CCA threshold, sub-frame position for channel detection, symbol position for channel detection, and period of channel detection.
  • the receiving unit is configured to: receive, by the base station, radio resource control signaling, media access control unit signaling, or physical layer signaling, on a licensed frequency band or an unlicensed frequency band.
  • a terminal comprising: a channel detecting apparatus when the LTE system according to any one of the foregoing technical solutions operates in an unlicensed frequency band.
  • the base station can consider the uplink multi-user multiplexing when the terminal is instructed to perform channel detection, and further can instruct the terminal to perform a reasonable channel detection process, and realize the non-standard under the premise of improving spectrum utilization efficiency.
  • 1A is a schematic diagram of a base station self-scheduling terminal
  • FIG. 1B is a schematic diagram of a base station cross-carrier scheduling terminal
  • FIG. 2 is a schematic flow chart showing a channel detecting method when an LTE system operates in an unlicensed band according to an embodiment of the present invention
  • FIG. 3 is a schematic block diagram of a channel detecting apparatus when an LTE system operates in an unlicensed band according to an embodiment of the present invention
  • Figure 4 shows a schematic block diagram of a terminal in accordance with an embodiment of the present invention
  • FIG. 5 is a schematic diagram showing a CCA detection location of a base station when scheduling a terminal across carriers according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram showing a CCA detection location of a base station when scheduling a terminal across carriers according to another embodiment of the present invention
  • FIG. 7 is a schematic diagram showing an adjustment manner of a CCA threshold value according to an embodiment of the present invention.
  • FIG. 8 shows a schematic structural diagram of another terminal according to an embodiment of the present invention.
  • FIG. 2 is a schematic flow chart of a channel detecting method when an LTE system operates in an unlicensed band according to an embodiment of the present invention.
  • a channel detection method when an LTE system operates in an unlicensed frequency band includes:
  • Step 202 Receive indication information sent by a base station.
  • Step 204 Perform uplink channel detection on an unlicensed frequency band based on the indication information.
  • Step 206 Send uplink data when detecting that the uplink channel is in an idle state.
  • the uplink channel detection is performed on the unlicensed frequency band according to the indication information sent by the base station, so that when the base station performs the channel detection, the base station can consider the uplink multi-user multiplexing, and can instruct the terminal to perform reasonable.
  • the channel detection process realizes the coexistence of unlicensed frequency bands with other systems (such as Wi-Fi systems) while improving the efficiency of spectrum utilization, while ensuring the fairness of competing channels on unlicensed frequency bands.
  • the step of receiving the indication information sent by the base station specifically includes: receiving parameter information that the terminal sends the terminal to perform channel detection;
  • the step of performing uplink channel detection on the unlicensed frequency band based on the indication information includes: determining, according to the parameter information, a subframe position that may be used for uplink transmission, and listening to the base station at a corresponding subframe position.
  • the base station may notify the terminal of the parameter information of the channel detection by the terminal, and the terminal determines the subframe position that may be used for the uplink transmission according to the parameter information, and the terminal may monitor whether the base station sends the corresponding location. If the uplink scheduling instruction is received, the terminal may perform uplink channel detection according to the parameter information notified by the base station in advance.
  • the terminal After the base station notifies the terminal to perform the parameter information of the channel detection, the terminal considers that the subframe n+4 is a subframe position that may be used for uplink transmission based on the parameter information notified by the base station, and further determines The uplink scheduling command may be sent on the subframe n, and the terminal may monitor whether the uplink scheduling command sent by the base station is received in the subframe n. If received, the uplink channel detection may be performed on the subframe n+3.
  • the parameter information includes a combination of any one or more of the following: a subframe position at which the terminal performs uplink channel detection, a symbol position at which the terminal performs uplink channel detection, a period in which the terminal performs uplink channel detection, and The CCA threshold value when the terminal performs uplink channel detection.
  • the method further includes: listening, in the licensed frequency band and/or the unlicensed frequency band, an uplink scheduling instruction sent by the base station.
  • the step of receiving the indication information sent by the base station specifically includes: monitoring an uplink scheduling instruction sent by the base station; and performing, according to the indication information, an uplink channel detection step on the unlicensed frequency band, specifically The method includes: if the uplink scheduling instruction sent by the base station is monitored in any subframe, performing uplink channel detection at a position corresponding to any one of the subframes.
  • the base station does not need to notify the terminal of relevant information in advance, and the terminal can continue to monitor in the unlicensed frequency band or the licensed frequency band to determine whether to monitor the uplink scheduling instruction sent by the base station, and monitor in any subframe.
  • the terminal may perform uplink channel detection at a corresponding position on the unlicensed frequency band. Specifically, if the terminal monitors the uplink scheduling command sent by the base station in the subframe n, and the uplink scheduling instruction instructs the terminal to perform uplink transmission on the subframe n+4, the terminal may perform uplink channel detection on the subframe n+3. .
  • the method further includes: determining a location corresponding to any one of the subframes based on a predefined rule, or
  • the step of receiving the indication information sent by the base station includes: receiving an adjustment rule of the channel detection parameter sent by the base station;
  • the step of performing uplink channel detection on the unlicensed frequency band based on the indication information includes: adjusting, according to the adjustment rule, parameters of the terminal each time uplink channel detection is performed, and performing an uplink channel based on the adjusted parameter. Detection.
  • the base station can notify the terminal of the adjustment rule of the uplink channel detection parameter, and the terminal can adjust the channel detection parameter each time the uplink channel detection is performed. For example, each time channel detection is performed, the threshold value for each channel detection can be adjusted.
  • the channel detection parameter includes a combination of any one or more of the following: a CCA (Clear Channel Assessment) threshold, a channel detection subframe position, and a channel detection symbol position. .
  • CCA Carrier Channel Assessment
  • the step of receiving the indication information sent by the base station includes: receiving, by the base station, the radio resource control signaling, the medium access control unit signaling, or the licensed frequency band or the unlicensed frequency band.
  • the indication information sent by the physical layer signaling includes: receiving, by the base station, the radio resource control signaling, the medium access control unit signaling, or the licensed frequency band or the unlicensed frequency band.
  • FIG. 3 shows a schematic block diagram of a channel detecting apparatus when an LTE system operates in an unlicensed band according to an embodiment of the present invention.
  • the channel detecting apparatus 300 when the LTE system operates in an unlicensed frequency band includes: a receiving unit 302, a channel detecting unit 304, and a transmitting unit 306.
  • the receiving unit 302 is configured to receive indication information sent by the base station
  • the channel detecting unit 304 is configured to perform uplink channel detection on the unlicensed frequency band based on the indication information
  • the sending unit 306 is configured to send uplink data when the channel detecting unit 304 detects that the uplink channel is in an idle state.
  • the uplink channel detection is performed on the unlicensed frequency band according to the indication information sent by the base station, so that when the base station performs the channel detection, the base station can consider the uplink multi-user multiplexing, and can instruct the terminal to perform reasonable.
  • the channel detection process realizes the coexistence of unlicensed frequency bands with other systems (such as Wi-Fi systems) while improving the efficiency of spectrum utilization, while ensuring the fairness of competing channels on unlicensed frequency bands.
  • the receiving unit 302 is specifically configured to: receive parameter information of the terminal for channel detection sent by the base station; the channel detecting unit 304 is specifically configured to: determine, according to the parameter information, The subframe position of the uplink transmission, and the uplink scheduling instruction sent by the base station is monitored at the corresponding subframe position, and if the uplink scheduling instruction is monitored, the uplink channel detection is performed according to the parameter information.
  • the base station may notify the terminal of the parameter information of the channel detection by the terminal, and the terminal determines the subframe position that may be used for the uplink transmission according to the parameter information, and the terminal may monitor whether the base station sends the corresponding location. If the uplink scheduling instruction is received, the terminal may perform uplink channel detection according to the parameter information notified by the base station in advance. Specifically, after the base station informs the terminal to perform channel detection parameter information, the terminal considers that the subframe n+4 is a subframe position that may be used for uplink transmission based on the parameter information notified by the base station, and further determines that the subframe n may be sent. The uplink scheduling command may be used by the terminal to monitor whether the uplink scheduling command sent by the base station is received in the subframe n, and if received, the uplink channel detection may be performed on the subframe n+3.
  • the parameter information includes a combination of any one or more of the following: a subframe position at which the terminal performs uplink channel detection, a symbol position at which the terminal performs uplink channel detection, a period in which the terminal performs uplink channel detection, and The CCA threshold value when the terminal performs uplink channel detection.
  • the channel detecting unit 304 monitors an uplink scheduling instruction sent by the base station in a licensed frequency band and/or an unlicensed frequency band.
  • the receiving unit 302 is specifically configured to: monitor an uplink scheduling instruction sent by the base station; and the channel detecting unit 304 is specifically configured to: if the receiving unit 302 monitors in any subframe The uplink scheduling command sent by the base station performs uplink channel detection at a position corresponding to any one of the subframes.
  • the base station does not need to notify the terminal of relevant information in advance, and the terminal can continue to monitor in the unlicensed frequency band or the licensed frequency band to determine whether to monitor the uplink scheduling instruction sent by the base station, and monitor in any subframe.
  • the terminal may perform uplink channel detection at a corresponding position on the unlicensed frequency band. Specifically, if the terminal monitors the uplink scheduling command sent by the base station in the subframe n, and the uplink scheduling instruction instructs the terminal to perform uplink transmission on the subframe n+4, the terminal may perform uplink channel detection on the subframe n+3. .
  • the method further includes: a first determining unit 308, configured to determine a location corresponding to the any subframe according to a predefined rule; or a second determining unit 310, configured to receive the The notification information sent by the base station determines a location corresponding to any one of the subframes according to the notification information.
  • the receiving unit 302 is specifically configured to: receive an adjustment rule of a channel detection parameter sent by the base station; the channel detection unit 304 is specifically configured to: according to the adjustment rule, the terminal is in each The parameters for performing uplink channel detection are adjusted, and uplink channel detection is performed based on the adjusted parameters.
  • the base station can notify the terminal of the adjustment rule of the uplink channel detection parameter, and the terminal can adjust the channel detection parameter each time the uplink channel detection is performed. For example, each time channel detection is performed, the threshold value for each channel detection can be adjusted.
  • the channel detection parameter includes a combination of any one or more of the following: a CCA threshold, a subframe position of the channel detection, a symbol position of the channel detection, and a period of channel detection.
  • the receiving unit 302 is specifically configured to: receive, by the base station, radio resource control signaling, media access control unit signaling, or physical layer signaling on a licensed frequency band or an unlicensed frequency band.
  • Figure 4 shows a schematic block diagram of a terminal in accordance with an embodiment of the present invention.
  • the terminal 400 includes a channel detecting apparatus 300 when the LTE system operates in an unlicensed band as shown in FIG.
  • the technical solution of the present invention mainly proposes an uplink LBT mechanism applied to the LAA system, which can coexist with other systems while considering uplink multi-user multiplexing.
  • the present invention mainly proposes three LBT schemes for uplink transmission, which are applicable not only to the case of self-scheduling, but also to scenarios of cross-carrier scheduling.
  • the following three technical solutions proposed by the present invention are described in detail:
  • Option 1 Determine the uplink LBT location based on the base station indication
  • the base station notifies the terminal through RRC signaling, MAC (Media Access Control) CE (Control Element) signaling, or physical layer signaling in the licensed band or the unlicensed band.
  • the information of the notification may include a period in which the terminal performs the uplink LBT, a subframe position, an OFDM (Orthogonal Frequency Division Multiplexing) symbol position, and a possible uplink transmission subframe position, and may also include a CCA threshold. value.
  • the terminal After receiving the configuration information, the terminal performs an uplink LBT operation at the corresponding subframe position. Same When the terminal only listens to the uplink scheduling instruction at part of the subframe position.
  • the base station informs the terminal of the unlicensed spectrum in a period of 10 ms through RRC signaling, MAC CE, or physical layer signaling on the licensed spectrum (of course, also on the unlicensed spectrum).
  • There is a subframe for uplink transmission such as subframes n+4 and subframes n+14 in the figure, there is an uplink transmission opportunity, and CCA operation is performed on the last OFDM symbol on subframes n+3 and n+13. . Therefore, the terminal may only listen to the uplink scheduling instruction on the subframe n and the subframe n+10 of the licensed spectrum.
  • the terminal If the uplink scheduling instruction sent by the base station is monitored, the terminal performs the CCA operation on the subframes n+3 and n+13. If the channel is detected to be idle, the uplink data is transmitted on subframes n+4 and n+14.
  • FIG. 5 is only an example.
  • the period in which the terminal monitors the uplink scheduling instruction may be changed; the subframe position monitored in each period may also be changed; the uplink scheduling instruction of the monitoring may be
  • Option 2 Determine the location of the uplink LBT based on the base station scheduling
  • the base station sends an uplink scheduling instruction on a certain subframe, and then the terminal performs an uplink LBT operation at the corresponding subframe position.
  • the terminal may need to continuously monitor uplink scheduling information from the base station.
  • the terminal continuously monitors uplink scheduling information on the licensed spectrum, and receives an uplink scheduling instruction sent by the base station in subframe n and subframe n+9, respectively indicating that the terminal can be in the subframe n+4. And transmitting uplink data on subframe n+13, then the terminal will perform CCA operation on subframes n+3 and n+12.
  • the uplink scheduling instruction may also be sent from the unlicensed spectrum, and the subframe position at which the terminal performs the CCA may be based on a rule (such as the last symbol of the previous subframe of the uplink transmission subframe), or based on The subframe position notified by the base station.
  • a rule such as the last symbol of the previous subframe of the uplink transmission subframe
  • the base station notifies the terminal to perform LBT rules through RRC signaling, MAC CE, or physical layer signaling in the licensed band or the unlicensed band.
  • the rule may include a CCA threshold, a CCA subframe position, or Is the OFDM symbol position.
  • the following is an example of adjusting the CCA threshold.
  • the threshold of the idle channel of the different LBT operating points is different.
  • the base station notifies the terminal threshold adjustment rule through RRC signaling, MAC CE, or physical layer signaling in the licensed band or the unlicensed band, or uses a predefined threshold adjustment rule.
  • the rule that the base station adjusts the threshold value of the terminal through RRC signaling, MAC CE, or physical layer signaling in the licensed band or the unlicensed band is: each time the CCA operation is completed and successfully occupied. With the channel transmitting data, the next CCA threshold will be doubled.
  • the terminal When the terminal performs the CCA threshold on the last OFDM symbol of the subframe n+1, P1 is used. After the success (ie, the channel is detected to be idle), the data is transmitted on the subframe n+2; in the subframe n+ The CCA threshold used by the rule based on the notification on the last symbol of 2 is P2. If the CCA detection is also successfully passed, the uplink data is transmitted on the subframe n+3; the last symbol in the subframe n+3 The CCA threshold used by the notification-based rule is P3. If the CCA detection is also successfully passed, the uplink data is transmitted on the subframe n+3. When the CCA fails (ie, the channel is detected to be busy), the CCA threshold remains unchanged.
  • the rules of the notification may also be other ways, and the terminal needs to determine the specific manner of the CCA according to the rules of the notification.
  • FIG. 8 is a schematic structural diagram of another terminal according to an embodiment of the present invention.
  • the terminal 400 in the embodiment of the present invention may be different types of electronic devices, such as: smart phones, tablet computers, palmtop computers, and mobile internet devices, personal digital assistants, media players, smart televisions, smart watches, smart glasses, smart hands. Ring and so on.
  • the terminal 400 in the embodiment of the present invention includes: at least one processor 410, such as a CPU, at least one receiver 413, at least one memory 414, at least one transmitter 415, and at least one communication bus 412.
  • the communication bus 412 is used to implement connection communication between these components.
  • the receiver 413 and the transmitter 415 may be wired transmission ports, or may be wireless devices, for example, including antenna devices for data communication with other devices.
  • the memory 414 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the processor 410 can execute an operating system of the terminal 400 and various installed application programs, program codes, and the like, for example, each unit described above, including the receiving unit 302, the letter.
  • Program code is stored in the memory 414, and the processor 410 can invoke program code stored in the memory 414 via the communication bus 412 to perform related functions.
  • the various units described in FIG. 3 eg, the receiving unit 302, the channel detecting unit 304, the transmitting unit 306, the first determining unit 308, the second determining unit 310, etc.
  • the program code in the memory 414 is executed by the processor 410 to implement the functions of the various units to implement channel detection.
  • the memory 414 stores a plurality of instructions that are executed by the processor 410 to implement a channel detection method. Specifically, the processor 410 receives the indication information sent by the base station; based on the indication information, the processor 410 performs uplink channel detection on an unlicensed frequency band; and when detecting that the uplink channel is in an idle state, the processing is performed. The router 410 transmits uplink data.
  • the processor 410 receives parameter information of a terminal for channel detection sent by the base station; the processor 410 determines, according to the parameter information, a subframe position that may be used for uplink transmission, and corresponds to The uplink scheduling instruction sent by the base station is monitored at a subframe position, and if the uplink scheduling instruction is monitored, the processor 410 performs uplink channel detection according to the parameter information.
  • the parameter information includes a combination of any one or more of the following: a subframe position at which the terminal performs uplink channel detection, a symbol position at which the terminal performs uplink channel detection, a period in which the terminal performs uplink channel detection, and a terminal.
  • the CCA threshold for uplink channel detection includes a combination of any one or more of the following: a subframe position at which the terminal performs uplink channel detection, a symbol position at which the terminal performs uplink channel detection, a period in which the terminal performs uplink channel detection, and a terminal.
  • the processor 410 listens for uplink scheduling instructions sent by the base station in a licensed frequency band and/or an unlicensed frequency band.
  • the processor 410 listens to an uplink scheduling instruction sent by the base station; if the uplink scheduling instruction sent by the base station is monitored in any subframe, the processor 410 is in any one of the subframes. The corresponding position is used for uplink channel detection.
  • the processor 410 determines a location corresponding to the any subframe based on a predefined rule, or receives notification information sent by the base station, according to the notification. The information determines a location corresponding to any of the sub-frames.
  • the processor 410 receives an adjustment rule of a channel detection parameter sent by the base station; adjusts parameters of the terminal each time the uplink channel is detected according to the adjustment rule, and performs adjustment based on the adjusted parameter. Uplink channel detection.
  • the channel detection parameters comprise a combination of any one or more of the following: a CCA threshold, a channel detected subframe position, a channel detected symbol position, and a channel detection period.
  • the processor 410 receives the indication information that is sent by the base station by using radio resource control signaling, medium access control unit signaling, or physical layer signaling on a licensed band or an unlicensed band.
  • the above technical solution of the present invention mainly proposes an uplink LBT mechanism applied to the LAA system, so that coexistence of the LTE system and other systems in an unlicensed frequency band can be realized in consideration of uplink multi-user multiplexing.
  • the present invention provides a channel detection scheme for a new LTE system operating in an unlicensed frequency band, so that the terminal can perform a reasonable channel detection process and improve spectrum utilization efficiency. Under the premise, the coexistence of unlicensed frequency bands with other systems is realized, while ensuring the fairness of competing channels on unlicensed frequency bands.

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Abstract

本发明提供了一种LTE系统在非授权频段工作时的信道检测方法、信道检测装置和终端，其中，LTE系统在非授权频段工作时的信道检测方法，包括：接收基站发送的指示信息；基于所述指示信息，在非授权频段上进行上行信道检测；在检测到上行信道处于空闲状态时，发送上行数据。本发明的技术方案使得终端能够进行合理的信道检测过程，在提高频谱利用效率的前提下，实现了在非授权频段与其它系统的共存，同时保证在非授权频段上竞争信道的公平性。

Description

信道检测方法、信道检测装置和终端
本申请要求于2016年1月21日提交中国专利局，申请号为201610040303.5、发明名称为“信道检测方法、信道检测装置和终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，具体而言，涉及一种LTE系统在非授权频段工作时的信道检测方法、一种LTE系统在非授权频段工作时的信道检测装置和一种终端。
背景技术
目前，随着移动业务的快速发展，现有的分配给移动业务的无线频谱的容量已经无法满足要求了。在3GPP Rel-13阶段，一种称作LAA(Licensed-Assisted Access，辅助接入技术)的机制被引入，在LAA机制中，移动通信的传输可以在非授权频谱上承载，如5GHz的频段，而目前使用这些非授权频谱的主要是Wi-Fi、蓝牙、雷达、医疗等系统在使用。
在LAA系统中，为了保证与其他系统的公平共享非授权频谱。一种先听后说(Listen Before Talk，LBT)的机制被引入了。也就是说在发送数据之前，需要发送端去检测信道是否空闲，当信道空闲的时候才能够去发送数据。目前，LBT的机制已有两种，一种是基于FBE(Frame-Based Equipment，基于帧的设备)的LBT机制，另一种是基于LBE(Load-Based Equipment，基于负载的设备)的LBT机制。在基于FBE的LBT机制中，需要根据预定的周期进行信道空闲与否的检测；在基于LBE的LBT机制中，可以根据业务的需求随时发起信道空闲与否的检测。LBT的操作是基于能量检测的，也就是说当持续监听信道发现信道上的信号强度低于某个门限值时，就认为信道是空闲的。
对于下行传输来说，只需要基站侧执行LBT操作，并且在检测到信 道处于空闲状态时，那么基站就可以发送下行数据给终端，而终端侧不需要执行信道空闲与否的识别。
而对于上行传输来说，由于在LTE(Long Term Evolution，长期演进)系统的设计中，上行的传输是由基站来进行控制的。也就是说，基站需要发送上行调度指令给终端，终端才能基于上行调度指令的指示在相应的位置上进行数据的传输。在这种设计下，终端在非授权频谱上的传输的设计可以有多种实现的方法，在self-scheduling(自调度)的情况下，非授权频谱上的上行传输的调度指令是从非授权频谱上发送的，具体如图1A所示，基站在非授权频谱上的子帧n向终端发送上行调度指令，指示终端在非授权频谱上的子帧n+4可传输上行数据；而在跨载波调度的情况下，非授权频谱上的上行传输的调度指令可以是从授权频谱上发送的，具体如图1B所示，基站在授权频谱上的子帧n向终端发送上行调度指令，指示终端在非授权频谱上的子帧n+4可传输上行数据。
目前，在LAA的标准化过程中，对于上行传输的LBT的设计，考虑了以下的方案：
方案1：终端在上行传输之前做一个one-shot的LBT，如果信道是空闲的，那么就可以接入信道进行上行传输；
方案2：终端在上行传输之前做一个基于LBE的LBT；
方案3：只在基站侧做LBT，占用信道后下行传输结束的一定时间内直接发送上行传输。
但是，上述方案均存在相应的问题，具体地：上述方案1会影响到非授权频段上的其他系统的共存，由于方案1是比较容易占用信道的，那么在与其他系统共存的时候可能会导致不能公平共存的问题；在方案2的情况下，由于不同终端的信道环境是不一样的，会导致无法实现终端复用信道进行传输的问题，导致频谱效率的降低；在方案3的情况下，由于终端侧做上行传输前，终端没有做LBT，因此也会影响与其他系统的共存。
发明内容
本发明正是基于上述技术问题至少之一，提出了一种新的LTE系统 在非授权频段工作时的信道检测方案，使得终端能够进行合理的信道检测过程，在提高频谱利用效率的前提下，实现了在非授权频段与其它系统的共存，同时保证在非授权频段上竞争信道的公平性。
有鉴于此，根据本发明的第一方面，提出了一种LTE系统在非授权频段工作时的信道检测方法，包括：接收基站发送的指示信息；基于所述指示信息，在非授权频段上进行上行信道检测；在检测到上行信道处于空闲状态时，发送上行数据。
在该技术方案中，通过根据基站发送的指示信息在非授权频段上进行上行信道检测，使得基站在指示终端进行信道检测时，能够考虑到上行多用户复用的情况，进而能够指示终端进行合理的信道检测过程，在提高频谱利用效率的前提下，实现在非授权频段与其它系统(如Wi-Fi系统)的共存，同时保证在非授权频段上竞争信道的公平性。
在上述技术方案中，优选地，接收基站发送的指示信息的步骤，具体包括：接收基站发送的终端进行信道检测的参数信息；
基于所述指示信息，在非授权频段上进行上行信道检测的步骤，具体包括：根据所述参数信息，确定可能用于上行传输的子帧位置，并在对应的子帧位置上监听所述基站发送的上行调度指令，若监听到所述上行调度指令，则根据所述参数信息进行上行信道检测。
在该技术方案中，基站可以事先将终端进行信道检测的参数信息通知给终端，终端根据该参数信息确定可能用于上行传输的子帧位置，进而终端可以在相应的位置上监听基站是否发送了上行调度指令，若监听到上行调度指令，则终端可以根据基站事先通知的参数信息进行上行信道检测。具体地，如基站在通知终端进行信道检测的参数信息之后，终端基于基站通知的参数信息认为子帧n+4是可能用于上行传输的子帧位置，进而确定在子帧n上可能会发送上行调度指令则终端可以在子帧n上监听是否接收到基站发送的上行调度指令，若接收到，则可以在子帧n+3上进行上行信道检测。
在上述技术方案中，优选地，所述参数信息包括以下任一或多个的组合：终端进行上行信道检测的子帧位置、终端进行上行信道检测的符号位 置、终端进行上行信道检测的周期和终端进行上行信道检测时的CCA门限值。
在上述任一技术方案中，优选地，终端进行上行信道检测的符号位置是固定的，可以在一个子帧的最后一个或多个符号，或是在一个子帧的最开始的一个或多个符号。
在上述任一技术方案中，优选地，还包括：在授权频段和/或非授权频段监听所述基站发送的上行调度指令。
在上述任一技术方案中，优选地，接收基站发送的指示信息的步骤，具体包括：监听基站发送的上行调度指令；基于所述指示信息，在非授权频段上进行上行信道检测的步骤，具体包括：若在任一子帧监听到所述基站发送的上行调度指令，则在与所述任一子帧相对应的位置进行上行信道检测。
在该技术方案中，基站无需事先向终端通知相关的信息，终端可以持续在非授权频段或是授权频段上进行监听，以确定是否监听到基站发送的上行调度指令，当在任一子帧上监听到基站发送的上行调度指令时，终端可以在非授权频段上相对应的位置上进行上行信道检测。具体地，如终端在子帧n上监听到基站发送的上行调度指令，该上行调度指令指示终端在子帧n+4上进行上行传输，则终端可以在子帧n+3上进行上行信道检测。
在上述技术方案中，优选地，还包括：基于预定义的规则确定与所述任一子帧相对应的位置，或
接收所述基站发送的通知信息，根据所述通知信息确定与所述任一子帧相对应的位置。
在上述任一技术方案中，优选地，接收基站发送的指示信息的步骤，具体包括：接收基站发送的信道检测参数的调整规则；
基于所述指示信息，在非授权频段上进行上行信道检测的步骤，具体包括：根据所述调整规则对终端在每次进行上行信道检测时的参数进行调整，并基于调整后的参数进行上行信道检测。
在该技术方案中，基站可以通知终端上行信道检测参数的调整规则，进而终端在每次进行上行信道检测时可以对信道检测参数进行调整。如在 每次进行信道检测时，可以对每次进行信道检测的门限值进行调整。
在上述技术方案中，优选地，所述信道检测参数包括以下任一或多个的组合：CCA门限值、信道检测的子帧位置、信道检测的符号位置。
在上述任一技术方案中，优选地，接收基站发送的指示信息的步骤，具体包括：接收所述基站在授权频段或非授权频段上通过无线资源控制信令、媒体接入控制单元信令或物理层信令发送的所述指示信息。
根据本发明的第二方面，还提出了一种LTE系统在非授权频段工作时的信道检测装置，包括：接收单元，设置为接收基站发送的指示信息；信道检测单元，设置为基于所述指示信息，在非授权频段上进行上行信道检测；发送单元，设置为在所述信道检测单元检测到上行信道处于空闲状态时，发送上行数据。
在该技术方案中，通过根据基站发送的指示信息在非授权频段上进行上行信道检测，使得基站在指示终端进行信道检测时，能够考虑到上行多用户复用的情况，进而能够指示终端进行合理的信道检测过程，在提高频谱利用效率的前提下，实现在非授权频段与其它系统(如Wi-Fi系统)的共存，同时保证在非授权频段上竞争信道的公平性。
在上述技术方案中，优选地，所述接收单元具体设置为：接收基站发送的终端进行信道检测的参数信息；所述信道检测单元具体设置为：根据所述参数信息，确定可能用于上行传输的子帧位置，并在对应的子帧位置上监听所述基站发送的上行调度指令，若监听到所述上行调度指令，则根据所述参数信息进行上行信道检测。
在该技术方案中，基站可以事先将终端进行信道检测的参数信息通知给终端，终端根据该参数信息确定可能用于上行传输的子帧位置，进而终端可以在相应的位置上监听基站是否发送了上行调度指令，若监听到上行调度指令，则终端可以根据基站事先通知的参数信息进行上行信道检测。具体地，如基站在通知终端进行信道检测的参数信息之后，终端基于基站通知的参数信息认为子帧n+4是可能用于上行传输的子帧位置，进而确定在子帧n上可能会发送上行调度指令，则终端可以在子帧n上监听是否接收到基站发送的上行调度指令，若接收到，则可以在子帧n+3上进行上行 信道检测。
在上述技术方案中，优选地，所述参数信息包括以下任一或多个的组合：终端进行上行信道检测的子帧位置、终端进行上行信道检测的符号位置、终端进行上行信道检测的周期和终端进行上行信道检测时的CCA门限值。
在上述任一技术方案中，优选地，所述信道检测单元在授权频段和/或非授权频段监听所述基站发送的上行调度指令。
在上述任一技术方案中，优选地，所述接收单元具体设置为：监听基站发送的上行调度指令；所述信道检测单元具体设置为：若所述接收单元在任一子帧监听到所述基站发送的上行调度指令，则在与所述任一子帧相对应的位置进行上行信道检测。
在该技术方案中，基站无需事先向终端通知相关的信息，终端可以持续在非授权频段或是授权频段上进行监听，以确定是否监听到基站发送的上行调度指令，当在任一子帧上监听到基站发送的上行调度指令时，终端可以在非授权频段上相对应的位置上进行上行信道检测。具体地，如终端在子帧n上监听到基站发送的上行调度指令，该上行调度指令指示终端在子帧n+4上进行上行传输，则终端可以在子帧n+3上进行上行信道检测。
在上述技术方案中，优选地，还包括：第一确定单元，设置为基于预定义的规则确定与所述任一子帧相对应的位置；或第二确定单元，设置为接收所述基站发送的通知信息，根据所述通知信息确定与所述任一子帧相对应的位置。
在上述任一技术方案中，优选地，所述接收单元具体设置为：接收基站发送的信道检测参数的调整规则；所述信道检测单元具体设置为：根据所述调整规则对终端在每次进行上行信道检测时的参数进行调整，并基于调整后的参数进行上行信道检测。
在该技术方案中，基站可以通知终端上行信道检测参数的调整规则，进而终端在每次进行上行信道检测时可以对信道检测参数进行调整。如在每次进行信道检测时，可以对每次进行信道检测的门限值进行调整。
在上述技术方案中，优选地，所述信道检测参数包括以下任一或多个 的组合：CCA门限值、信道检测的子帧位置、信道检测的符号位置和信道检测的周期。
在上述任一技术方案中，优选地，所述接收单元具体设置为：接收所述基站在授权频段或非授权频段上通过无线资源控制信令、媒体接入控制单元信令或物理层信令发送的所述指示信息。
根据本发明的第三方面，还提出了一种终端，包括：如上述技术方案中任一项所述的LTE系统在非授权频段工作时的信道检测装置。
通过以上技术方案，使得基站在指示终端进行信道检测时，能够考虑到上行多用户复用的情况，进而能够指示终端进行合理的信道检测过程，在提高频谱利用效率的前提下，实现了在非授权频段与其它系统的共存，同时保证在非授权频段上竞争信道的公平性。
附图说明
图1A示出了基站自调度终端的示意图；
图1B示出了基站跨载波调度终端的示意图；
图2示出了根据本发明的实施例的LTE系统在非授权频段工作时的信道检测方法的示意流程图；
图3示出了根据本发明的实施例的LTE系统在非授权频段工作时的信道检测装置的示意框图；
图4示出了根据本发明的实施例的终端的示意框图；
图5示出了根据本发明的一个实施例的基站在跨载波调度终端时的CCA检测位置示意图；
图6示出了根据本发明的另一个实施例的基站在跨载波调度终端时的CCA检测位置示意图；
图7示出了根据本发明的实施例的CCA门限值的调整方式示意图
图8示出了根据本发明的实施例的另一种终端的结构示意图。
具体实施方式
为了能够更清楚地理解本发明的上述目的、特征和优点，下面结合附 图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。
图2示出了根据本发明的实施例的LTE系统在非授权频段工作时的信道检测方法的示意流程图。
如图2所示，根据本发明的实施例的LTE系统在非授权频段工作时的信道检测方法，包括：
步骤202，接收基站发送的指示信息；
步骤204，基于所述指示信息，在非授权频段上进行上行信道检测；
步骤206，在检测到上行信道处于空闲状态时，发送上行数据。
在该技术方案中，通过根据基站发送的指示信息在非授权频段上进行上行信道检测，使得基站在指示终端进行信道检测时，能够考虑到上行多用户复用的情况，进而能够指示终端进行合理的信道检测过程，在提高频谱利用效率的前提下，实现在非授权频段与其它系统(如Wi-Fi系统)的共存，同时保证在非授权频段上竞争信道的公平性。
在上述技术方案中，优选地，接收基站发送的指示信息的步骤，具体包括：接收基站发送的终端进行信道检测的参数信息；
基于所述指示信息，在非授权频段上进行上行信道检测的步骤，具体包括：根据所述参数信息，确定可能用于上行传输的子帧位置，并在对应的子帧位置上监听所述基站发送的上行调度指令，若监听到所述上行调度指令，则根据所述参数信息进行上行信道检测。
在该技术方案中，基站可以事先将终端进行信道检测的参数信息通知给终端，终端根据该参数信息确定可能用于上行传输的子帧位置，进而终端可以在相应的位置上监听基站是否发送了上行调度指令，若监听到上行调度指令，则终端可以根据基站事先通知的参数信息进行上行信道检测。具体地，如基站在通知终端进行信道检测的参数信息之后，终端基于基站通知的参数信息认为子帧n+4是可能用于上行传输的子帧位置，进而确定 在子帧n上可能会发送上行调度指令，则终端可以在子帧n上监听是否接收到基站发送的上行调度指令，若接收到，则可以在子帧n+3上进行上行信道检测。
在上述技术方案中，优选地，所述参数信息包括以下任一或多个的组合：终端进行上行信道检测的子帧位置、终端进行上行信道检测的符号位置、终端进行上行信道检测的周期和终端进行上行信道检测时的CCA门限值。
在上述任一技术方案中，优选地，还包括：在授权频段和/或非授权频段监听所述基站发送的上行调度指令。
在上述任一技术方案中，优选地，接收基站发送的指示信息的步骤，具体包括：监听基站发送的上行调度指令；基于所述指示信息，在非授权频段上进行上行信道检测的步骤，具体包括：若在任一子帧监听到所述基站发送的上行调度指令，则在与所述任一子帧相对应的位置进行上行信道检测。
在该技术方案中，基站无需事先向终端通知相关的信息，终端可以持续在非授权频段或是授权频段上进行监听，以确定是否监听到基站发送的上行调度指令，当在任一子帧上监听到基站发送的上行调度指令时，终端可以在非授权频段上相对应的位置上进行上行信道检测。具体地，如终端在子帧n上监听到基站发送的上行调度指令，该上行调度指令指示终端在子帧n+4上进行上行传输，则终端可以在子帧n+3上进行上行信道检测。
在上述技术方案中，优选地，还包括：基于预定义的规则确定与所述任一子帧相对应的位置，或
接收所述基站发送的通知信息，根据所述通知信息确定与所述任一子帧相对应的位置。
在上述任一技术方案中，优选地，接收基站发送的指示信息的步骤，具体包括：接收基站发送的信道检测参数的调整规则；
基于所述指示信息，在非授权频段上进行上行信道检测的步骤，具体包括：根据所述调整规则对终端在每次进行上行信道检测时的参数进行调整，并基于调整后的参数进行上行信道检测。
在该技术方案中，基站可以通知终端上行信道检测参数的调整规则，进而终端在每次进行上行信道检测时可以对信道检测参数进行调整。如在每次进行信道检测时，可以对每次进行信道检测的门限值进行调整。
在上述技术方案中，优选地，所述信道检测参数包括以下任一或多个的组合：CCA(Clear Channel Assessment，信道空闲检测)门限值、信道检测的子帧位置、信道检测的符号位置。
在上述任一技术方案中，优选地，接收基站发送的指示信息的步骤，具体包括：接收所述基站在授权频段或非授权频段上通过无线资源控制信令、媒体接入控制单元信令或物理层信令发送的所述指示信息。
图3示出了根据本发明的实施例的LTE系统在非授权频段工作时的信道检测装置的示意框图。
如图3所示，根据本发明的实施例的LTE系统在非授权频段工作时的信道检测装置300，包括：接收单元302、信道检测单元304和发送单元306。
其中，接收单元302，设置为接收基站发送的指示信息；
信道检测单元304，设置为基于所述指示信息，在非授权频段上进行上行信道检测；
发送单元306，设置为在所述信道检测单元304检测到上行信道处于空闲状态时，发送上行数据。
在该技术方案中，通过根据基站发送的指示信息在非授权频段上进行上行信道检测，使得基站在指示终端进行信道检测时，能够考虑到上行多用户复用的情况，进而能够指示终端进行合理的信道检测过程，在提高频谱利用效率的前提下，实现在非授权频段与其它系统(如Wi-Fi系统)的共存，同时保证在非授权频段上竞争信道的公平性。
在上述技术方案中，优选地，所述接收单元302具体设置为：接收基站发送的终端进行信道检测的参数信息；所述信道检测单元304具体设置为：根据所述参数信息，确定可能用于上行传输的子帧位置，并在对应的子帧位置上监听所述基站发送的上行调度指令，若监听到所述上行调度指令，则根据所述参数信息进行上行信道检测。
在该技术方案中，基站可以事先将终端进行信道检测的参数信息通知给终端，终端根据该参数信息确定可能用于上行传输的子帧位置，进而终端可以在相应的位置上监听基站是否发送了上行调度指令，若监听到上行调度指令，则终端可以根据基站事先通知的参数信息进行上行信道检测。具体地，如基站在通知终端进行信道检测的参数信息之后，终端基于基站通知的参数信息认为子帧n+4是可能用于上行传输的子帧位置，进而确定在子帧n上可能会发送上行调度指令，则终端可以在子帧n上监听是否接收到基站发送的上行调度指令，若接收到，则可以在子帧n+3上进行上行信道检测。
在上述技术方案中，优选地，所述参数信息包括以下任一或多个的组合：终端进行上行信道检测的子帧位置、终端进行上行信道检测的符号位置、终端进行上行信道检测的周期和终端进行上行信道检测时的CCA门限值。
在上述任一技术方案中，优选地，所述信道检测单元304在授权频段和/或非授权频段监听所述基站发送的上行调度指令。
在上述任一技术方案中，优选地，所述接收单元302具体设置为：监听基站发送的上行调度指令；所述信道检测单元304具体设置为：若所述接收单元302在任一子帧监听到所述基站发送的上行调度指令，则在与所述任一子帧相对应的位置进行上行信道检测。
在该技术方案中，基站无需事先向终端通知相关的信息，终端可以持续在非授权频段或是授权频段上进行监听，以确定是否监听到基站发送的上行调度指令，当在任一子帧上监听到基站发送的上行调度指令时，终端可以在非授权频段上相对应的位置上进行上行信道检测。具体地，如终端在子帧n上监听到基站发送的上行调度指令，该上行调度指令指示终端在子帧n+4上进行上行传输，则终端可以在子帧n+3上进行上行信道检测。
在上述技术方案中，优选地，还包括：第一确定单元308，设置为基于预定义的规则确定与所述任一子帧相对应的位置；或第二确定单元310，设置为接收所述基站发送的通知信息，根据所述通知信息确定与所述任一子帧相对应的位置。
在上述任一技术方案中，优选地，所述接收单元302具体设置为：接收基站发送的信道检测参数的调整规则；所述信道检测单元304具体设置为：根据所述调整规则对终端在每次进行上行信道检测时的参数进行调整，并基于调整后的参数进行上行信道检测。
在该技术方案中，基站可以通知终端上行信道检测参数的调整规则，进而终端在每次进行上行信道检测时可以对信道检测参数进行调整。如在每次进行信道检测时，可以对每次进行信道检测的门限值进行调整。
在上述技术方案中，优选地，所述信道检测参数包括以下任一或多个的组合：CCA门限值、信道检测的子帧位置、信道检测的符号位置和信道检测的周期。
在上述任一技术方案中，优选地，所述接收单元302具体设置为：接收所述基站在授权频段或非授权频段上通过无线资源控制信令、媒体接入控制单元信令或物理层信令发送的所述指示信息。
图4示出了根据本发明的实施例的终端的示意框图。
如图4所示，根据本发明的实施例的终端400，包括：如图3中所示的LTE系统在非授权频段工作时的信道检测装置300。
综上所述，本发明的技术方案主要是提出了一种应用于LAA系统的上行LBT机制，可以在考虑上行多用户复用的情况下实现与其他系统的共存。具体地，本发明主要提出了三种上行传输的LBT方案，不仅适用于self-scheduling的情况，尤其适用于跨载波调度的场景。以下详细说明本发明提出的三个技术方案：
方案1：基于基站指示决定上行LBT位置
在这种方案下，基站在授权频段或是非授权频段上通过RRC信令、MAC(Media Access Control，媒体接入控制)CE(Control Element，控制单元)信令，或是物理层信令通知终端在相应的位置上做上行LBT的操作。通知的信息可以包括终端做上行LBT的周期、子帧位置、OFDM(Orthogonal Frequency Division Multiplexing，正交频分复用技术)符号位置，以及可能的上行传输的子帧位置，也可以包括CCA门限值。终端在接收到这个配置信息之后在相应的子帧位置上做上行LBT的操作。同 时，终端只在部分的子帧位置上监听上行调度指令。
具体地，如图5所示，假定基站在授权频谱上(当然也可以是在非授权频谱上)通过RRC信令、MAC CE，或是物理层信令通知终端在非授权频谱以10ms为周期存在上行传输的子帧，比如图中的子帧n+4和子帧n+14上是存在上行传输机会的，并且在子帧n+3和n+13上的最后一个OFDM符号上做CCA操作。于是终端可能只在授权频谱的子帧n和子帧n+10上监听上行调度指令，如果监听到了基站发送的上行调度指令，那么终端将会在子帧n+3和n+13上做CCA操作，如果检测到信道空闲，那么会在子帧n+4和n+14上传输上行数据。
需要注意的是：图5只是一个示例，基于同样的原理，终端监听上行调度指令的周期可以是变化的；每个周期内监听的子帧位置也可能是变化的；监听的上行调度指令可以是从授权频谱上发送，也可以从非授权频谱上发送；做CCA操作的子帧位置和OFDM符号的位置也可以是变化的，基于基站的通知决定。
方案2：基于基站调度决定上行LBT的位置
在该方案中，基站在某个子帧上发送上行调度指令，那么终端在对应的子帧位置上进行上行LBT的操作。在这种方案下，终端可能需要持续的监听来自基站的上行调度信息。
具体地，如图6所示，终端持续监听授权频谱上的上行调度信息，在子帧n和子帧n+9上分别收到了基站发送的上行调度指令，分别指示终端可以在子帧n+4和子帧n+13上传输上行数据，那么终端将在子帧n+3和n+12上做CCA操作。
同样的，上行调度指令也可以是从非授权频谱上发送的，终端做CCA的子帧位置可以是基于规则(比如就在上行传输子帧的前一个子帧的最后一个符号)，或是基于基站通知的子帧位置。
方案3：基于规则的LBT
在这种方案下，基站在授权频段或是非授权频段上通过RRC信令、MAC CE，或是物理层信令通知终端做LBT的规则，规则中可能包括CCA门限值、CCA子帧位置或是OFDM符号位置。
以下以调整CCA门限值为例进行说明：当终端在做上行LBT的操作时，不同的LBT操作点的判断信道空闲与否的门限值是不一样的。并且基站在授权频段或是非授权频段上通过RRC信令、MAC CE，或是物理层信令通知终端门限值调整的规则，或是使用预先定义好的门限值调整的规则。
具体如图7所示，假设基站在授权频段或是非授权频段上通过RRC信令、MAC CE，或是物理层信令通知终端门限值调整的规则是：每做完一次CCA操作并且成功占用了信道传输数据，那么下一次CCA的门限值将会增高一倍。
当终端在子帧n+1的最后一个OFDM符号上做CCA的门限值使用的是P1，成功后(即检测到信道空闲)，在子帧n+2上传输数据；在子帧n+2的最后一个符号上基于通知的规则使用的CCA门限值是P2，若同样也成功通过了CCA检测，则在子帧n+3上传输上行数据；在子帧n+3的最后一个符号上基于通知的规则使用的CCA门限值是P3，若同样也成功通过了CCA检测，则在子帧n+3上传输上行数据。当CCA失败(即检测到信道繁忙)时，CCA的门限值保持不变。当然，通知的规则也可能是其它方式，终端需要按照通知的规则决定CCA的具体方式。
图8是本发明实施例公开的另一种终端的结构示意图。本发明实施例中的终端400可以是不同类型的电子设备，例如：智能手机、平板电脑、掌上电脑以及移动互联网设备、个人数字助理、媒体播放器、智能电视、智能手表、智能眼镜、智能手环等。如图8所示，本发明实施例中的终端400包括：至少一个处理器410，例如CPU，至少一个接收器413，至少一个存储器414，至少一个发送器415，至少一个通信总线412。其中，所述通信总线412用于实现这些组件之间的连接通信。其中，所述接收器413和所述发送器415可以是有线发送端口，也可以为无线设备，例如包括天线装置，用于与其他设备进行数据通信。所述存储器414可以是高速RAM存储器，也可以是非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。
所述处理器410可执行所述终端400的操作系统以及安装的各类应用程序、程序代码等，例如，上述的各个单元，包括所述接收单元302、所述信 道检测单元304、所述发送单元306、所述第一确定单元308、所述第二确定单元310等。
所述存储器414中存储有程序代码，且所述处理器410可通过通信总线412，调用所述存储器414中存储的程序代码以执行相关的功能。例如，图3所述的各个单元(例如，所述接收单元302、所述信道检测单元304、所述发送单元306、所述第一确定单元308、所述第二确定单元310等)是存储在所述存储器414中的程序代码，并由所述处理器410所执行，从而实现所述各个单元的功能以实现信道检测。
在本发明的一个实施例中，所述存储器414存储多个指令，所述多个指令被所述处理器410所执行以实现信道检测方法。具体而言，所述处理器410接收基站发送的指示信息；基于所述指示信息，所述处理器410在非授权频段上进行上行信道检测；在检测到上行信道处于空闲状态时，所述处理器410发送上行数据。
在进一步的实施例中，所述处理器410接收基站发送的终端进行信道检测的参数信息；所述处理器410根据所述参数信息，确定可能用于上行传输的子帧位置，并在对应的子帧位置上监听所述基站发送的上行调度指令，若监听到所述上行调度指令，则所述处理器410根据所述参数信息进行上行信道检测。
在进一步的实施例中，所述参数信息包括以下任一或多个的组合：终端进行上行信道检测的子帧位置、终端进行上行信道检测的符号位置、终端进行上行信道检测的周期，以及终端进行上行信道检测时的CCA门限值。
在进一步的实施例中，所述处理器410在授权频段和/或非授权频段监听所述基站发送的上行调度指令。
在进一步的实施例中，所述处理器410监听基站发送的上行调度指令；若在任一子帧监听到所述基站发送的上行调度指令，则所述处理器410在与所述任一子帧相对应的位置进行上行信道检测。
在进一步的实施例中，所述处理器410基于预定义的规则确定与所述任一子帧相对应的位置，或接收所述基站发送的通知信息，根据所述通知 信息确定与所述任一子帧相对应的位置。
在进一步的实施例中，所述处理器410接收基站发送的信道检测参数的调整规则；根据所述调整规则对终端在每次进行上行信道检测时的参数进行调整，并基于调整后的参数进行上行信道检测。
在进一步的实施例中，所述信道检测参数包括以下任一或多个的组合：CCA门限值、信道检测的子帧位置、信道检测的符号位置和信道检测的周期。
在进一步的实施例中，所述处理器410接收所述基站在授权频段或非授权频段上通过无线资源控制信令、媒体接入控制单元信令或物理层信令发送的所述指示信息。
具体地，所述处理器410对上述指令的具体实现方法可参考图2对应实施例中相关步骤的描述，在此不赘述。
本发明的上述技术方案主要提出了一种应用于LAA系统的上行LBT机制，使得可以在考虑了上行多用户复用的情况下实现LTE系统与其他系统在非授权频段的共存。
以上结合附图详细说明了本发明的技术方案，本发明提出了一种新的LTE系统在非授权频段工作时的信道检测方案，使得终端能够进行合理的信道检测过程，在提高频谱利用效率的前提下，实现了在非授权频段与其它系统的共存，同时保证在非授权频段上竞争信道的公平性。
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。凡在本发明的精神和原则之内，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 (19)

  1. 一种LTE系统在非授权频段工作时的信道检测方法，其特征在于，包括：
    接收基站发送的指示信息；
    基于所述指示信息，在非授权频段上进行上行信道检测；
    在检测到上行信道处于空闲状态时，发送上行数据。
  2. 根据权利要求1所述的LTE系统在非授权频段工作时的信道检测方法，其特征在于：
    接收基站发送的指示信息的步骤，具体包括：接收基站发送的终端进行信道检测的参数信息；
    基于所述指示信息，在非授权频段上进行上行信道检测的步骤，具体包括：根据所述参数信息，确定可能用于上行传输的子帧位置，并在对应的子帧位置上监听所述基站发送的上行调度指令，若监听到所述上行调度指令，则根据所述参数信息进行上行信道检测。
  3. 根据权利要求2所述的LTE系统在非授权频段工作时的信道检测方法，其特征在于，所述参数信息包括以下任一或多个的组合：
    终端进行上行信道检测的子帧位置、终端进行上行信道检测的符号位置、终端进行上行信道检测的周期，以及终端进行上行信道检测时的CCA门限值。
  4. 根据权利要求2所述的LTE系统在非授权频段工作时的信道检测方法，其特征在于，还包括：
    在授权频段和/或非授权频段监听所述基站发送的上行调度指令。
  5. 根据权利要求1所述的LTE系统在非授权频段工作时的信道检测方法，其特征在于：
    接收基站发送的指示信息的步骤，具体包括：监听基站发送的上行调度指令；
    基于所述指示信息，在非授权频段上进行上行信道检测的步骤，具体包括：若在任一子帧监听到所述基站发送的上行调度指令，则在与所述任一子帧相对应的位置进行上行信道检测。
  6. 根据权利要求5所述的LTE系统在非授权频段工作时的信道检测方法，其特征在于，还包括：
    基于预定义的规则确定与所述任一子帧相对应的位置，或
    接收所述基站发送的通知信息，根据所述通知信息确定与所述任一子帧相对应的位置。
  7. 根据权利要求1所述的LTE系统在非授权频段工作时的信道检测方法，其特征在于：
    接收基站发送的指示信息的步骤，具体包括：接收基站发送的信道检测参数的调整规则；
    基于所述指示信息，在非授权频段上进行上行信道检测的步骤，具体包括：根据所述调整规则对终端在每次进行上行信道检测时的参数进行调整，并基于调整后的参数进行上行信道检测。
  8. 根据权利要求7所述的LTE系统在非授权频段工作时的信道检测方法，其特征在于，所述信道检测参数包括以下任一或多个的组合：
    CCA门限值、信道检测的子帧位置、信道检测的符号位置和信道检测的周期。
  9. 根据权利要求1至8中任一项所述的LTE系统在非授权频段工作时的信道检测方法，其特征在于，接收基站发送的指示信息的步骤，具体包括：
    接收所述基站在授权频段或非授权频段上通过无线资源控制信令、媒体接入控制单元信令或物理层信令发送的所述指示信息。
  10. 一种LTE系统在非授权频段工作时的信道检测装置，其特征在于，包括：
    接收单元，设置为接收基站发送的指示信息；
    信道检测单元，设置为基于所述指示信息，在非授权频段上进行上行信道检测；
    发送单元，设置为在所述信道检测单元检测到上行信道处于空闲状态时，发送上行数据。
  11. 根据权利要求10所述的LTE系统在非授权频段工作时的信道检 测装置，其特征在于：
    所述接收单元具体设置为：接收基站发送的终端进行信道检测的参数信息；
    所述信道检测单元具体设置为：根据所述参数信息，确定可能用于上行传输的子帧位置，并在对应的子帧位置上监听所述基站发送的上行调度指令，若监听到所述上行调度指令，则根据所述参数信息进行上行信道检测。
  12. 根据权利要求11所述的LTE系统在非授权频段工作时的信道检测装置，其特征在于，所述参数信息包括以下任一或多个的组合：
    终端进行上行信道检测的子帧位置、终端进行上行信道检测的符号位置、终端进行上行信道检测的周期，以及终端进行上行信道检测时的CCA门限值。
  13. 根据权利要求11所述的LTE系统在非授权频段工作时的信道检测装置，其特征在于，所述信道检测单元在授权频段和/或非授权频段监听所述基站发送的上行调度指令。
  14. 根据权利要求10所述的LTE系统在非授权频段工作时的信道检测装置，其特征在于：
    所述接收单元具体设置为：监听基站发送的上行调度指令；
    所述信道检测单元具体设置为：若所述接收单元在任一子帧监听到所述基站发送的上行调度指令，则在与所述任一子帧相对应的位置进行上行信道检测。
  15. 根据权利要求14所述的LTE系统在非授权频段工作时的信道检测装置，其特征在于，还包括：
    第一确定单元，设置为基于预定义的规则确定与所述任一子帧相对应的位置；或
    第二确定单元，设置为接收所述基站发送的通知信息，根据所述通知信息确定与所述任一子帧相对应的位置。
  16. 根据权利要求10所述的LTE系统在非授权频段工作时的信道检测装置，其特征在于：
    所述接收单元具体设置为：接收基站发送的信道检测参数的调整规则；
    所述信道检测单元具体设置为：根据所述调整规则对终端在每次进行上行信道检测时的参数进行调整，并基于调整后的参数进行上行信道检测。
  17. 根据权利要求16所述的LTE系统在非授权频段工作时的信道检测装置，其特征在于，所述信道检测参数包括以下任一或多个的组合：
    CCA门限值、信道检测的子帧位置、信道检测的符号位置和信道检测的周期。
  18. 根据权利要求10至17中任一项所述的LTE系统在非授权频段工作时的信道检测装置，其特征在于，所述接收单元具体设置为：
    接收所述基站在授权频段或非授权频段上通过无线资源控制信令、媒体接入控制单元信令或物理层信令发送的所述指示信息。
  19. 一种终端，其特征在于，包括：如权利要求10至18中任一项所述的LTE系统在非授权频段工作时的信道检测装置。
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