WO2017028556A1 - 基于非授权频段的发现参考信号配置方法、装置和基站 - Google Patents

基于非授权频段的发现参考信号配置方法、装置和基站 Download PDF

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Publication number
WO2017028556A1
WO2017028556A1 PCT/CN2016/080823 CN2016080823W WO2017028556A1 WO 2017028556 A1 WO2017028556 A1 WO 2017028556A1 CN 2016080823 W CN2016080823 W CN 2016080823W WO 2017028556 A1 WO2017028556 A1 WO 2017028556A1
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period
cca
drs
time period
signal
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PCT/CN2016/080823
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English (en)
French (fr)
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李明菊
朱亚军
张云飞
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宇龙计算机通信科技(深圳)有限公司
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Publication of WO2017028556A1 publication Critical patent/WO2017028556A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • 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]

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, an apparatus, and a base station for configuring a discovery reference signal based on an unlicensed frequency band.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • carrier aggregation capabilities make it possible to deploy LTE to unlicensed bands.
  • LAA LTE Assisted Access
  • the unlicensed spectrum can work in two ways.
  • SDL Supplemental Downlink
  • TDD Time Division Duplexing
  • Subframes are included. This situation can only be supplemented by the carrier aggregation technology.
  • the TDD mode can be used with DC (Dual Connectivity) or independently. As shown in Figure 1 below.
  • LTE operating in unlicensed bands has the ability to provide higher spectral efficiency and greater coverage, while seamlessly switching data traffic between licensed and unlicensed bands based on the same core network. For users, this means a better broadband experience, higher speed, better stability Sex and mobile convenience.
  • WiFi Wireless Fidelity
  • CSMA/CA Carrier Sense Multiple Access/Collision Detection
  • the basic principle of this method is WiFi AP (Access). Point, access point) or the terminal must first monitor whether there is an AP or the terminal is transmitting/receiving signaling or data before sending signaling or data. If there is, continue to listen until it is not monitored. , generating a random number as the backoff time. If no signaling or data transmission is detected during this backoff time, the AP or the terminal may start to send signaling or data after the end of the backoff time.
  • CSMA/CA Carrier Sense Multiple Access/Collision Detection
  • the good orthogonality guarantees the interference level, so the uplink and downlink transmissions between the base station and the user do not need to consider whether there are base stations or users in the surrounding transmission. If LTE is used in the unlicensed frequency band, it does not consider whether there are other devices around. In the use of unlicensed bands, it will cause great interference to WiFi devices. Because LTE only needs to enter the business. Transmission, no listening rules, WiFi equipment LTE has a traffic transmission when the transmission will not only LTE service until the transfer is complete, to detect the state of the channel is idle before transmitting.
  • LTE uses unlicensed bands to ensure that the LAA can coexist with existing access technologies (such as WiFi) on a fair and friendly basis.
  • existing access technologies such as WiFi
  • LBT Listen Before Talk
  • LTE requires an LBT mechanism. In this way, if the LTE detects that the channel is busy on the unlicensed spectrum, the LTE cannot occupy the frequency band, and if the channel is detected to be idle, it can be occupied.
  • the green thin strip is the CCA channel detection time, and the CCA detection time (duration is about 20us) periodically repeats. If the channel is detected to be idle, the channel is occupied. The channel occupancy time is maximized. After the channel occupation time, there is an idle time. At the idle time, the sending point does not send signals and data, so that other sending points can preempt the channel. After the idle time, the CCA detection time occurs again. If the channel is detected to be busy, the channel is not occupied, and the channel is detected again until the CCA detection time of the next period occurs. The channel detection time also belongs to the idle time, and the idle duration must be greater than 5% of the maximum channel occupation time. The Idle time plus the maximum time occupied by the channel is the period.
  • LBE-based LBT mechanism LBE's LBT mechanism is cycle-free, as long as the service arrives, The initial CCA detection time is triggered (duration is about 34 us), if the CCA detection is idle, the signaling or data is sent immediately; if the channel is detected to be busy, the defer period time is turned on, and the channel idle time is detected again to reach the defer period time. (after a duration of about 34us), take a random number M, M ranges from 1 to q, and q ranges from 4 to 32.
  • each ECCA detection time detects the channel. If the channel is detected to be idle, M-1, if the channel is detected to be busy, M does not change, and After detecting that the channel idle time continues to reach the defer period (duration is about 34us), the channel can be detected again by the ECCA detection time granularity. When the channel is idle, M can start to decrement again. When M is 0, the signal is sent. Order or data.
  • the LAA reference signal for RRM measurement/cell identification/downlink synchronization/time-frequency estimation, etc. may be implemented in two ways: one is short control signaling, and the requirement to be satisfied in this way is 5% in 50 ms.
  • the time is being sent, which is 2.5ms.
  • the other is to send aperiodic DRS, because DRS transmission takes 6ms (DMTC: DRS Measurement Timing Configuration) time, and if it is sent when it detects that the channel is busy, it will bring more to other systems. Interference, so if it is a DRS (Discovery Reference Signal), it can only be sent when it detects that the channel is idle, then it can only be aperiodic.
  • DMTC DRS Measurement Timing Configuration
  • the location of the DRS and the location of the CCA time period have not yet been determined. How to select the appropriate location as the transmission time period of the DRS and the CCA time period is currently a hot spot of research.
  • a technical problem to be solved by the embodiments of the present invention is to provide a method, an apparatus, and a base station for configuring a discovery reference signal based on an unlicensed frequency band.
  • the appropriate location can be determined for the DRS transmission time period and the CCA time period, and the success rate of transmitting the DRS is improved.
  • the configuration method of the reference signal includes:
  • N CCA time segments in the subframe wherein N ⁇ 1 and being an integer, the N CCA time segments are located before the DRS transmission time period.
  • the embodiment of the present invention further provides a configuration device for discovering a reference signal based on an unlicensed frequency band, including:
  • a first configuration module configured to configure a DRS transmission time period of the discovery reference signal DRS to be transmitted in the subframe
  • a second configuration module configured to configure N CCA time segments in the subframe; where N ⁇ 1 and an integer, the N CCA time segments are located before the DRS transmission time period.
  • an embodiment of the present invention further provides a base station, including a communication bus, an input device, an output device, a memory, and a processor, where:
  • the communication bus is configured to implement connection communication between the input device, the output device, the memory, and the processor;
  • the program stores a set of program codes, and the base station calls program code stored in the memory to perform the following operations:
  • the processor configures N CCA time segments in the subframe; where N ⁇ 1 and is an integer, and the N CCA time segments are located before the DRS transmission time period.
  • the processor further performs the following operations:
  • the end time of the CCA period coincides with the start time of the DRS transmission period.
  • the processor further performs the following operations:
  • the output device sends the specified signal by using the specified signal transmission period, and transmits the specified period by using the DRS Sending the DRS to be transmitted.
  • the processor further performs the following operations:
  • a designated signal transmission period for transmitting a designated signal between an end time of the N CCA periods and a start time of the DRS transmission period; wherein N>1, the designated signal Including initial signal or reserved signal;
  • the output device transmits the specified signal through the unused CCA period and the specified signal transmission period, and transmits the DRS to be transmitted through the DRS transmission period.
  • the duration of the specified signal transmission period is a minimum value that satisfies a transmission condition of the specified signal.
  • the processor further performs the following operations:
  • the output device when the start time of the DRS transmission time period is located in the data transmission time period, does not perform a CCA process, does not send a designated signal, and directly sends the to-be-transmitted transmission through the DRS transmission time period.
  • DRS wherein the designated signal comprises an initial signal or a reserved signal.
  • the duration of one CCA period is the first duration
  • the N CCA time segments include an initial CCA time period, an enhanced channel idle detection ECCA time period, and the N CCA time segments are provided with a delay defer period time period; wherein the first duration, The duration of the initial CCA period and the duration of the defer period are integer multiples of the duration of the ECCA period.
  • the base station configures a transmission time period for transmitting the DRS and at least one CCA time period in the subframe, and at least one CCA time period is located before the DRS transmission time period, so that the base station can pre-predict the CCA time period before transmitting the DRS to be transmitted.
  • the strategy is set to detect the channel state, and then the DRS is transmitted during the DRS transmission period to improve the success rate of the DRS transmission.
  • 1 is a schematic diagram of a method for detecting an existing unlicensed band channel
  • FIG. 2 is a schematic flowchart of a method for configuring a discovery reference signal based on an unlicensed frequency band according to the first embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for configuring a discovery reference signal based on an unlicensed band according to a second embodiment of the present invention
  • Figure 3b is a configuration timing diagram of the discovery reference signal of Figure 3a;
  • FIG. 4 is a schematic flowchart of a method for configuring a discovery reference signal based on an unlicensed band according to a third embodiment of the present invention
  • FIG. 4b is a configuration timing diagram of the discovery reference signal of FIG. 4a;
  • FIG. 5 is a schematic flowchart of a method for configuring a discovery reference signal based on an unlicensed frequency band according to a fourth embodiment of the present invention.
  • Figure 5b is a configuration timing diagram of the discovery reference signal of Figure 5a;
  • FIG. 6 is a schematic structural diagram of an apparatus for configuring a discovery reference signal based on an unlicensed frequency band according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method for configuring a discovery reference signal in an unlicensed frequency band according to a first embodiment of the present invention.
  • the method includes:
  • the DRS includes multiple downlink reference signals for RRM measurement, cell identification, downlink synchronization, time-frequency estimation, and the like.
  • the DRS includes one or more of SSS, PSS, CRS, and CSI-RS.
  • the DRS transmission time period is a preset time interval for transmitting DRS.
  • one radio frame includes 10 subframes, and when the base station configures the DRS transmission time period of the DRS to be transmitted, the base station can be configured in one or more subframes, and the position of the DRS transmission time period in each subframe is Fixed, only one DRS transmission time period in a radio frame can successfully send the DRS to be transmitted.
  • Each subframe in the LTE communication system includes 14 symbols.
  • the number of symbols and the symbol position can be determined from 14 symbols according to the data volume of the DRS to be transmitted, for example, the fourth in the subframe.
  • the symbol to the 7th symbol is used as the DRS transmission time period of the DRS to be transmitted, or the 5th symbol to the 10th symbol in the subframe is used as the DRS transmission time period of the DRS to be transmitted.
  • the CCA time period indicates a time interval of a preset length, and is used to monitor whether the unlicensed band channel is in an idle state or a busy state.
  • the N CCA time segments are configured in the subframe in which the DRS transmission time period is located, where the N CCA time segments are located before the DRS transmission time period and cannot coincide with the DRS transmission time period, where N is an integer greater than or equal to 1. If N>1, the durations of the plurality of CCA periods may be equal or unequal, and the invention is not limited.
  • the duration of one CCA period is the first duration
  • the N CCA time segments include an initial CCA time period, an enhanced channel idle detection ECCA time period, and the N CCA time segments are provided with a delay defer period period; wherein the first duration, The duration of the initial CCA period and the duration of the defer period are integer multiples of the duration of the ECCA period.
  • the length of the CCA period configured by the base station is the first duration; when N>1, the N CCA periods configured by the base station include an initial CCA period, an ECCA period, and the N CCAs.
  • the time segment is provided with a defer period, wherein the initial CCA time period is the first CCA time period, the ECCA time period is the time period after the first CCA time period, and the defer period time period is the initial CCA time period or the ECCA time period.
  • the duration that the base station configures the foregoing time period satisfies: the first duration, the duration of the initial CCA period, and the duration of the defer period are integer multiples of the duration of the ECCA period.
  • a base station configures a transmission time period for transmitting a DRS and at least one CCA time period in a subframe, and at least one CCA time period is located before a DRS transmission time period, so that the base station may send the DRS to be transmitted before transmitting
  • the channel state is detected according to a preset policy during the CCA period, and then the DRS is transmitted during the DRS transmission period to improve the success rate of the DRS transmission.
  • FIG. 3 is a schematic flowchart of a method for configuring a discovery reference signal based on an unlicensed frequency band according to a second embodiment of the present invention.
  • the method includes:
  • one radio frame of the LTE communication system includes 10 subframes, and each subframe includes two slot slots, and each slot includes 7 symbols, that is, 1 subframe includes 14 symbols.
  • the DRS is used to implement functions such as RRM measurement, downlink synchronization, time-frequency estimation, and the like, and the DRS includes multiple types of downlink reference signals, such as one or more of PSS, SSS, CRS, and CSI-RS.
  • the DRS transmission time period is a time interval of a preset length within the subframe, and is used for transmitting the DRS to be transmitted.
  • the DRS transmission time period in which the base station configures the DRS to be transmitted in the subframe is specifically: determining a Symbol position and a number of Symbols occupied by the DRS to be transmitted in the subframe.
  • the time period to be transmitted is a time interval consisting of the fourth symbol to the seventh symbol, and a total of four symbols are occupied; or the time period to be transmitted is a time interval from the fifth symbol to the tenth symbol, occupying a total of 6 Symbols.
  • the base station configures one CCA time period in the subframe, and the end time of the CCA time period coincides with the start time of the DRS transmission time period configured in S301.
  • the CCA time period is a preset time interval for monitoring the state of the unlicensed band channel
  • the base station measures the received signal power of the unlicensed band channel during the CCA time period, when the received signal power is less than the preset power, Indicates that the unlicensed band channel is idle during the CCA time period, and vice versa, indicating that the unlicensed band channel is busy during the CCA time period.
  • the base station is configured in S302.
  • the DRS to be transmitted is transmitted in the DRS transmission period configured in S301.
  • the base station when the base station needs to send downlink data, obtain a data transmission time period of the downlink data to be transmitted, and if the start time of the DRS transmission time period is within the data transmission time period, the CCA detection process is not performed, and the process directly passes.
  • the DRS transmission period transmits the DRS to be transmitted.
  • the downlink data does not include the DRS
  • the base station after the base station obtains the use right of the unlicensed band channel by using the CCA mechanism or the ECCA mechanism, the base station occupies the unlicensed band channel for a certain length of time, and the certain length of time corresponds to the data transmission time of the embodiment.
  • Segment, used to send downlink data to be transmitted For example, when the base station needs to send downlink data, trigger the CCA mechanism under the LBE to determine the data transmission time period of the downlink data to be transmitted when the unlicensed band channel is idle in the CCA time period, and the maximum duration of the data transmission time period.
  • the first CCA time period is the initial CCA time period
  • the subsequent CCA time period is the ECCA time period
  • the duration of each ECCA time period is less than the duration of the initial CCA time period; when in the initial CCA or ECCA time
  • the preset duration is greater than or equal to the defer period, and only in the continuous check.
  • the data transmission time period occupies multiple subframes, and the duration thereof is much longer than the duration of the DRS transmission time period. If the start time of the DRS transmission time period configured by S301 is within the data transmission time period of the downlink data, Therefore, the unlicensed band channel in the DRS transmission period is necessarily in an idle state, so it is not necessary to perform the CCA procedure before the DRS transmission period, and the DRS can be directly transmitted in the DRS transmission period.
  • one radio frame includes 10 subframes, and each subframe includes 14 subframes.
  • the base station configures the DRS transmission time in subframe 4.
  • the DRS transmission time period occupies the 4th symbol to the 7th symbol, and the base station configures one CCA time period in the subframe 4, and the end time of the CCA time period coincides with the start time of the DRS transmission time period.
  • the base station detects that the unlicensed band channel is in an idle state during the CCA time period, the base station transmits the DRS to be transmitted in the DRS transmission time period.
  • FIG. 4 is a schematic flowchart of a method for configuring a discovery reference signal based on an unlicensed frequency band according to a third embodiment of the present invention.
  • the method includes:
  • one radio frame of the LTE communication system includes 10 subframes, and each subframe includes two slot slots, and each slot includes 7 symbols, that is, 1 subframe includes 14 symbols.
  • the DRS is used to implement functions such as RRM measurement, downlink synchronization, time-frequency estimation, etc.
  • the DRS includes multiple types of downlink reference signals, for example, the DRS includes one or more of PSS, SSS, CRS, and CSI-RS.
  • the DRS transmission time period is a time interval of a preset length in the subframe, and the length of the DRS transmission time period depends on the data amount of the DRS to be transmitted, and is proportional to the data amount of the DRS to be transmitted.
  • the DRS transmission time period in which the base station configures the DRS to be transmitted in the subframe is specifically: determining a symbol position and a symbol number occupied by the DRS to be transmitted in the subframe.
  • the time period to be transmitted is a time interval consisting of the fourth symbol to the seventh symbol, and a total of four symbols are occupied; or the time period to be transmitted is a time interval from the fifth symbol to the tenth symbol, occupying a total of 6 Symbols.
  • the base station configures one CCA time period in the subframe, and the one CCA time period is located in front of the DRS transmission time period.
  • the specified signal transmission time period is used for transmitting the specified signal
  • the designated signal includes an initial signal or a reserved signal
  • the specified signal transmission time period is a preset time interval, and is located in a CCA transmission configured in S402.
  • the time period and the DRS transmission time period configured by S401 that is, the start time of the designated signal transmission time period coincides with the end time of the CCA transmission time period, and the end time of the designated signal transmission time period coincides with the start of the DRS transmission time period. time.
  • the CCA time period is a preset time interval for monitoring the state of the unlicensed band channel
  • the base station measures the received signal power of the unlicensed band channel in the CCA time period, and if the received signal power is less than the preset power, indicating that the The licensed band channel is in an idle state, otherwise, the unlicensed band channel is in a busy state.
  • the base station detects that the unlicensed band channel is in an idle state within one CCA time period configured by S402
  • the base station transmits the designated signal within the specified signal transmission time period, and transmits the to-be-transmitted transmission within the DRS transmission time period when the designated signal transmission time period ends. DRS to the user device.
  • the duration of the specified signal transmission period is a minimum value that satisfies the transmission condition of the specified signal.
  • the base station when the base station needs to send downlink data, obtain a data transmission time period of the downlink data to be transmitted, and if the start time of the DRS transmission time period is within the data transmission time period, the CCA detection process is not performed, and the process directly passes.
  • the DRS transmission period transmits the DRS to be transmitted.
  • the downlink data does not include the DRS, and after the base station obtains the use right of the unlicensed band channel by using the CCA mechanism or the ECCA mechanism, the base station occupies the unlicensed band channel for a certain length of time, and the certain length of time corresponds to the data transmission time of the embodiment. Segment, used to send downlink data to be transmitted. For example, when the base station needs to send downlink data, the CCA mechanism of the LBE is triggered to determine the data transmission time period of the downlink data to be transmitted when the unlicensed frequency band channel is idle in the initial CCA time period, and the maximum duration of the data transmission time period.
  • the first CCA time period is the initial CCA time period
  • the subsequent CCA time period is the ECCA time period
  • the duration of each ECCA time period is less than the duration of the initial CCA time period; when in the initial CCA or ECCA time
  • the preset duration is greater than or equal to the defer period, and only the channel is continuously detected.
  • the data transmission time period occupies multiple subframes, and its duration is much longer than DRS.
  • the duration of the transmission time period If the starting time of the configured DRS transmission time period is within the data transmission time period of the downlink data, the unlicensed frequency band channel in the DRS transmission time period is necessarily idle, and therefore does not need to be transmitted in the DRS.
  • the CCA process is executed before the time period, and the specified signal is not sent, and the DRS can be directly transmitted during the DRS transmission time period.
  • one radio frame includes 10 subframes, and each subframe includes 14 subframes.
  • the base station configures the DRS transmission time period in the subframe 4
  • the DRS transmission time period occupies the 4th symbol to the 7th symbol
  • the base station configures one CCA time period and the specified signal transmission time period in the subframe 4, and specifies
  • the signal transmission time period occupies the second symbol and the third symbol, and the end time of the CCA time period coincides with the start time of the specified signal transmission time period.
  • the base station detects that the unlicensed band channel is in an idle state during the CCA time period, the base station transmits the designated signal in the designated signal transmission time period, and transmits the DRS to be transmitted in the DRS transmission time period.
  • a base station configures a transmission time period for transmitting a DRS and at least one CCA time period in a subframe, and at least one CCA time period is located before a DRS transmission time period, so that the base station may send the DRS to be transmitted before transmitting
  • the channel state is detected according to a preset policy during the CCA period, and then the DRS is transmitted during the DRS transmission period to improve the success rate of the DRS transmission.
  • FIG. 5 is a schematic flowchart of a method for configuring a discovery reference signal based on an unlicensed frequency band according to an embodiment of the present invention.
  • the method includes:
  • one radio frame of the LTE communication system includes 10 subframes, and each subframe includes two slot slots, and each slot includes 7 symbols, that is, 1 subframe includes 14 symbols.
  • the DRS is used to implement functions such as RRM measurement, downlink synchronization, time-frequency estimation, etc.
  • the DRS includes multiple types of downlink reference signals, for example, the DRS includes one or more of PSS, SSS, CRS, and CSI-RS.
  • the DRS transmission time period is a time interval of a preset length in the subframe, and the length of the DRS transmission time period depends on the data amount of the DRS to be transmitted, and is proportional to the data amount of the DRS to be transmitted.
  • the DRS transmission time period in which the base station configures the DRS to be transmitted in the subframe is specifically: determining a symbol position and a symbol number occupied by the DRS to be transmitted in the subframe.
  • the time period to be transmitted is a time interval consisting of the fourth symbol to the seventh symbol, and a total of four symbols are occupied; or the time period to be transmitted is a time interval from the fifth symbol to the tenth symbol, occupying a total of 6 Symbols.
  • the base station configures multiple CCA time segments in the subframe, wherein the duration of each CCA time period may be the same or different, and the duration of the CCA time period depends on the CCA mechanism adopted by the base station.
  • the N CCA time segments are located in front of the DRS transmission time period.
  • the specified signal transmission time period is used for transmitting the specified signal
  • the designated signal includes an initial signal or a reserved signal
  • the specified signal transmission time period is a preset time interval
  • the N CCA transmission is configured in the S402.
  • the time period and the DRS transmission time period configured by S401 that is, the start time of the designated signal transmission time period coincides with the end time of the N CCA transmission time periods, and the end time of the designated signal transmission time period coincides with the DRS transmission time period. Starting time.
  • the base station is configured with 16 CCA time segments, the base station detects the channel busy in the initial CCA time period, starts the defer period, and configures the random number M value to be 8, and the base station sequentially listens to the unlicensed band channel in each ECCA time period.
  • S505. Send, by using the unused CCA period and the specified signal transmission period. Determining a signal, and transmitting the DRS to be transmitted through the DRS transmission time period.
  • the base station transmits the designated signal through the unused CCA time period in S504 and the designated signal transmission time period configured in S503, and transmits the DRS to be transmitted through the DRS transmission time period.
  • the base station determines that the unused CCA time period is the 13th to 16th CCA time period, and the base station transmits the designated signal through the above four CCA time segments and the designated signal transmission time period, and transmits the DRS to be transmitted through the DRS transmission time period.
  • the duration of the specified signal transmission period is a minimum value that satisfies the transmission condition of the specified signal.
  • the base station when the base station needs to send downlink data, obtain a data transmission time period of the downlink data to be transmitted, and if the start time of the DRS transmission time period is within the data transmission time period, the CCA detection process is not performed, and the process directly passes.
  • the DRS transmission period transmits the DRS to be transmitted.
  • the downlink data does not include the DRS, and after the base station obtains the use right of the unlicensed band channel by using the CCA mechanism or the ECCA mechanism, the base station occupies the unlicensed band channel for a certain length of time, and the certain length of time corresponds to the data transmission time of the embodiment. Segment, used to send downlink data to be transmitted. For example, when the base station needs to send downlink data, the CCA mechanism of the LBE is triggered to determine the data transmission time period of the downlink data to be transmitted when the unlicensed frequency band channel is idle in the initial CCA time period, and the maximum duration of the data transmission time period.
  • the first CCA time period is the initial CCA time period
  • the subsequent CCA time period is the ECCA time period
  • the duration of each ECCA time period is less than the duration of the initial CCA time period; when in the initial CCA or ECCA time period
  • the preset time length needs to be increased before the next ECCA time period, and the preset duration is greater than or equal to the defer period, only when the channel idle is continuously detected.
  • Defer period value is reached, in order to detect again ECCA time granularity detection channel, if the channel is detected idle time ECCA, M starts decreasing again.
  • the defer period can be set to 0.
  • the data transmission time period occupies multiple subframes, and the duration thereof is much longer than the duration of the DRS transmission time period. If the configured DRS transmission time period starts, it is located at the downlink. During the data transmission time period of the data, the unlicensed band channel in the DRS transmission time period must be idle. Therefore, it is not necessary to perform the CCA process before the DRS transmission time period, and the specified signal is not sent, and can be directly sent during the DRS transmission time period. DRS.
  • the base station monitors the unlicensed band channel as an idle state in the CCA time period, if the time between the start time of the CCA time period and the end time of the DRS transmission time period
  • the threshold is less than a certain threshold
  • the designated signal does not need to be sent before the downlink data is sent, and the downlink data is directly sent. That is to say, when the end of the DRS transmission is less than a certain threshold, the downlink data starts to be transmitted, and the designated signal may not be transmitted before the downlink data is transmitted.
  • one radio frame includes 10 subframes, and each subframe includes 14 subframes.
  • the symbol, the base station configures the DRS transmission time period in the subframe 4, the DRS transmission time period occupies the 4th symbol to the 7th symbol, and the base station configures multiple CCA time segments and the specified signal transmission time period in the subframe 4, and specifies
  • the signal transmission time period occupies the second symbol and the third symbol, and the end times of the plurality of CCA time periods coincide with the start time of the specified signal transmission time period.
  • the base station determines the unused CCA time period when the number of times the unlicensed band channel is in the idle state reaches the preset number of times in the multiple CCA time periods, and sends the designated signal in the unused CCA time period and the designated signal transmission time period. And transmitting the DRS to be transmitted within the DRS transmission time period.
  • a base station configures a transmission time period for transmitting a DRS and at least one CCA time period in a subframe, and at least one CCA time period is located before a DRS transmission time period, so that the base station may send the DRS to be transmitted before transmitting
  • the channel state is detected according to a preset policy during the CCA period, and then the DRS is transmitted during the DRS transmission period to improve the success rate of the DRS transmission.
  • FIG. 6 is a schematic structural diagram of an apparatus for configuring a discovery reference signal based on an unlicensed frequency band according to an embodiment of the present invention.
  • the configuration apparatus includes a first configuration module 601 and a second configuration module. 602.
  • the first configuration module 601 is configured to configure a DRS transmission time period of the discovery reference signal DRS to be transmitted in the subframe.
  • the second configuration module 602 is configured to configure N CCA time segments in the subframe; where N ⁇ 1 and an integer, the N CCA time segments are located before the DRS transmission time period.
  • the configuration device of the embodiment of the present invention is used to implement the configuration method of the first embodiment of the method, and the method embodiment 1 is based on the same concept, and the technical effects thereof are also the same.
  • the specific principle refer to the description of the method embodiment 1. Let me repeat.
  • the configuration device further includes:
  • the end time of the CCA period coincides with the start time of the DRS transmission period.
  • the configuration device further includes:
  • the specified signal includes an initial signal or a reserved signal;
  • a second sending module configured to send the specified signal by using the specified signal transmission period, and send by using the DRS transmission time period, when the unlicensed frequency band channel is in an idle state during the N CCA time periods The DRS to be transmitted.
  • the configuration device further includes:
  • a fourth configuration module configured to configure a specified signal transmission period for transmitting the designated signal between an end time of the N CCA periods and a start time of the DRS transmission period; where N>1,
  • the specified signal includes an initial signal or a reserved signal;
  • a determining module configured to determine an unused CCA time period in the N CCA time periods when the number of times the unlicensed spectrum channel is in an idle state is reached within a preset number of times in the N CCA time periods;
  • a third sending module configured to send the specified signal by using the unused CCA period and the specified signal transmission period, and send the DRS to be transmitted by using the DRS transmission period.
  • the duration of the specified signal transmission period is a minimum value that satisfies a transmission condition of the specified signal.
  • the configuration device further includes:
  • a fourth sending module configured to acquire a data transmission time period of downlink data to be transmitted
  • the CCA process is not executed, the specified signal is not sent, and the DRS to be transmitted is directly sent through the DRS transmission time period.
  • the duration of one CCA period is the first duration
  • the N CCA time segments include an initial CCA time period, an enhanced channel idle detection ECCA time period, and the N CCA time segments are provided with a delay defer period time period; wherein the first duration, The duration of the initial CCA period and the duration of the defer period are integer multiples of the duration of the ECCA period.
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station includes a communication bus 702, an input device 703, an output device 704, a memory 705, and a processor 701. ,among them:
  • the communication bus 702 is configured to implement connection communication between the input device 703, the output device 704, the memory 705, and the processor 701;
  • the memory 705 stores a set of program codes, and the base station calls the program code stored in the memory 705 for performing the following operations:
  • the processor 701 configures a DRS transmission time period of the discovery reference signal DRS to be transmitted in a subframe
  • the processor 701 configures N CCA time segments in the subframe; where N ⁇ 1 and is an integer, and the N CCA time segments are located before the DRS transmission time period.
  • the processor 701 further performs the following operations:
  • the end time of one CCA period coincides with the start time of the DRS transmission period.
  • the processor 701 further performs the following operations:
  • the output device 704 transmits the specified signal by using the specified signal transmission period, and transmits by using the DRS.
  • the DRS to be transmitted is transmitted in a time period.
  • the processor 701 further performs the following operations:
  • the processor 701 configures a designated signal transmission period for transmitting a designated signal between an end time of the N CCA periods and a start time of the DRS transmission period; wherein N>1, the designation The signal includes an initial signal or a reserved signal;
  • the output device 704 transmits the specified signal through the unused CCA period and the specified signal transmission period, and transmits the DRS to be transmitted through the DRS transmission period.
  • the duration of the specified signal transmission period is a minimum value that satisfies a transmission condition of the specified signal.
  • processor 701 further performs the following operations:
  • the processor 701 acquires a data transmission time period of downlink data to be transmitted
  • the output device 704 When the start time of the DRS transmission time period is within the data transmission time period, the output device 704 does not perform the CCA process, does not send the designated signal, and directly sends the to-be-send through the DRS transmission time period. Transmitting a DRS; wherein the designated signal comprises an initial signal or a reserved signal.
  • the duration of one CCA period is the first duration
  • the N CCA time segments include an initial CCA time period, an enhanced channel idle detection ECCA time period, and the N CCA time segments are provided with a delay defer period time period; wherein the first duration, The duration of the initial CCA period and the duration of the defer period are integer multiples of the duration of the ECCA period.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明实施例公开了一种基于非授权频段的发现参考信号的配置方法,包括:在子帧内配置待传输发现参考信号DRS的DRS传输时间段;在所述子帧内配置N个CCA时间段;其中,N≥1且为整数,所述N个CCA时间段位于所述DRS传输时间段的前面。本发明实施例还公开了一种配置装置和基站。采用本发明,能选择合适的DRS发送位置和CCA时间段的位置,提高发送成功率。

Description

基于非授权频段的发现参考信号配置方法、装置和基站
本申请要求于2015年08月14日提交中国专利局,申请号为201510502202.0、发明名称为“基于非授权频段的发现参考信号配置方法、装置和基站”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
本发明涉及通信领域,尤其涉及一种基于非授权频段的发现参考信号配置方法、装置和基站。
背景技术
随着通信业务量的急剧增加,3GPP(3rd Generation Partnership Project,第三代合作伙伴计划)授权频谱显得越来越不足以提供更高的网络容量。为了进一步提高频谱资源的利用,3GPP正讨论如何在授权频谱的帮助下使用未授权频谱,如2.4GHz和5GHz频段。这些未授权频谱目前主要是WiFi(Wireless Fidelity,无线保真)蓝牙,雷达,医疗等系统在使用。一般来说,为已授权频段设计的接入技术,如LTE(Long Term Evolution,长期演进)不适合在未授权频段上使用,因为LTE这类接入技术对频谱效率和用户体验优化的要求非常高。然而,载波聚合功能让将LTE部署于非授权频段变为可能。3GPP提出了LAA(LTE Assisted Access,LTE辅助接入)的概念,借助LTE授权频谱的帮助来使用未授权频谱。而未授权频谱可以有两种工作方式,一种是补充下行(SDL,Supplemental Downlink),即只有下行传输子帧;另一种是TDD(Time Division Duplexing,时分双工)模式,上下行都传输子帧都包含。补充下行这种情况只能是借助载波聚合技术使用。而TDD模式可以借助DC(Dual Connectivity,双连接)使用,也可以独立使用。如下图1所示。
相比WiFi,工作在未授权频段的LTE有能力提供更高的频谱效率和更大的覆盖效果,同时基于同一个核心网让数据流量在授权频段和未授权频段之间无缝切换。对用户来说,这意味着更好的宽带体验、更高的速率、更好的稳定 性和移动便利。
现有的在非授权频谱上使用的接入技术,如WiFi,具有较弱的抗干扰能力。为了避免干扰,WiFi系统设计了很多干扰避免规则,如CSMA/CA((Carrier Sense Multiple Access/Collision Detection,即载波监听多路访问/冲突检测方法)。这个方法的基本原理是WiFi的AP(Access Point,接入点)或者终端在发送信令或者数据之前,要先监听检测周围是否有AP或者终端在发送/接收信令或数据,如果有,则继续监听,直到监听到没有为止。如果没有,则生成一个随机数作为退避时间,在这个退避时间内,如果没检测到有信令或数据传输,那么在退避时间结束之后,AP或终端可以开始发送信令或数据。而LTE网络中由于有很好的正交性保证了干扰水平,所以基站与用户的上下行传输不用考虑周围是否有基站或用户在进行传输。如果LTE在非授权频段上使用时也不考虑周围是否有别的设备在使用非授权频段,那么将对WiFi设备带来极大的干扰。因为LTE只要有业务就进行传输,没有任何监听规则,那么WiFi设备在LTE有业务传输时就没法传输,只能等到LTE业务传输完成,才能检测到信道空闲状态,才能进行传输。
所以LTE在使用非授权频段时,最主要的关键点之一是确保LAA能够在公平友好的基础上和现有的接入技术(比如WiFi)共存。而传统的LTE系统中没有LBT(Listen Before Talk,先听后说)的机制来避免碰撞。为了与WiFi更好的共存,LTE需要一种LBT机制。这样,LTE在非授权频谱上如果检测到信道忙,则不能占用该频段,如果检测到信道闲,才能占用。
基于我们之前的提案设计的FBE的LBT机制,绿色细条是CCA信道检测时间,CCA检测时间(持续时间约20us)周期性重复出现,若检测到信道空闲,则占用信道.在信道占用时间达到最大信道占用时间之后,有一个idle时间,在idle时间,发送点不发送信号和数据,便于其它发送点抢占信道。在idle时间之后,又出现CCA检测时间,若检测到信道忙,则不占用信道,直到下一周期的CCA检测时间出现时再次检测信道。信道检测时间也属于idle时间,idle时长必须大于信道最大占用时间的5%。Idle时间加上信道占用最大时间即周期。
基于LBE的LBT机制:LBE的LBT机制是无周期的,只要业务到达, 则触发初始CCA检测时间(持续时间约34us),如果CCA检测空闲,则马上发送信令或数据;若检测到信道忙,开启defer period时间,并且在再次检测到信道空闲时间持续达到defer period时间(持续时间约34us)之后,则取一个随机数M,M的取值范围为1到q,q的取值范围是4到32.图4显示的是q=16的情况,这时,当检测到信道空闲时,M-1,当M=0时,发送数据,且信道最大占用时间为(13/32)*q=6.5ms。则在6.5ms之后,采取Extended CCA机制(ECCA检测时间持续时间约9us),即也是随机取值M,M的范围为1到16,若取值为8,则表示在接下来的连续的ECCA(Extended Clear Channel Assessment,扩展的空闲信道估计)检测时间中,每个ECCA检测时间都要检测信道,若检测到信道空闲,则M-1,若检测到信道忙,则M不变,并且在再次检测到信道空闲时间持续达到defer period时间(持续时间约34us)之后,才能再次以ECCA检测时间粒度检测信道,在检测到信道空闲时,M才能再次开始递减,当M为0时,发送信令或数据。LAA的用于RRM测量/小区识别/下行同步/时频估计等的参考信号有可能用两种方式实现:一种是short control signaling,这种方式需要满足的requirement是50ms内可以有5%的时间在发送,也就是2.5ms。另一种是发送非周期的DRS,因为DRS发送占用6ms(DMTC:DRS Measurement Timing Configuration,DRS测量时间配置)的时间,而如果在检测到信道忙时也发送,将给其它系统带来较大的干扰,所以如果是发送DRS(Discovery Reference Signal,发现参考信号),就只能在检测到信道空闲时发送,那么就只能是非周期的。
在目前的LTE通信系统中,发送DRS的位置以及CCA时间段的位置还没有确定,如何选择合适的位置作为DRS的传输时间段以及CCA时间段是目前研究的热点。
发明内容
本发明实施例所要解决的技术问题在于,提供一种基于非授权频段的发现参考信号配置方法、装置和基站。可为DRS传输时间段和CCA时间段确定合适的位置,提高传输DRS的成功率。
为了解决上述技术问题,本发明实施例提供了一种基于非授权频段的发现 参考信号的配置方法,包括:
在子帧内配置待传输发现参考信号DRS的DRS传输时间段;
在所述子帧内配置N个CCA时间段;其中,N≥1且为整数,所述N个CCA时间段位于所述DRS传输时间段的前面。
相应地,本发明实施例还提供了一种基于非授权频段的发现参考信号的配置装置,包括:
第一配置模块,用于在子帧内配置待传输发现参考信号DRS的DRS传输时间段;
第二配置模块,用于在所述子帧内配置N个CCA时间段;其中,N≥1且为整数,所述N个CCA时间段位于所述DRS传输时间段的前面。
相应的,本发明实施例还提供了一种基站,包括通信总线、输入装置、输出装置、存储器以及处理器,其中:
所述通信总线,用于实现所述输入装置、输出装置、存储器以及处理器之间的连接通信;
所述存储器中存储一组程序代码,且所述基站调用所述存储器中存储的程序代码,用于执行以下操作:
所述处理器在子帧内配置待传输发现参考信号DRS的DRS传输时间段;
所述处理器在所述子帧内配置N个CCA时间段;其中,N≥1且为整数,所述N个CCA时间段位于所述DRS传输时间段的前面。
可选的,所述处理器在所述子帧内配置N个CCA时间段之后,还执行以下操作:
所述处理器在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,所述输出装置在所述DRS传输时间段内发送所述待传输DRS;其中,N=1,1个CCA时间段的结束时刻重合于所述DRS传输时间段的起始时刻。
可选的,所述处理器在所述子帧内配置N个CCA时间段之后,还执行以下操作:
所述处理器在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N=1,所述指定信号包括初始信号或预留信号;
所述处理器在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,所述输出装置通过所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
可选的,所述处理器在所述子帧内配置N个CCA时间段和用于传输指定信号的指定信号传输时间段之后,还执行以下操作:
所述处理器在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N>1,所述指定信号包括初始信号或预留信号;
所述处理器在所述N个CCA时间段内监听到非授权频谱信道为空闲状态的次数达到预设次数时,确定所述N个CCA时间段中未使用的CCA时间段;
所述输出装置通过所述未使用的CCA时间段和所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
可选的,所述指定信号传输时间段的持续时间为满足所述指定信号的传输条件的最小值。
可选的,所述处理器还执行以下操作:
所述处理器获取待传输下行数据的数据传输时间段;
所述输出装置在所述DRS传输时间段的起始时刻位于所述数据传输时间段内的情况下,不执行CCA流程,不发送指定信号,直接通过所述DRS传输时间段发送所述待传输DRS;其中,所述指定信号包括初始信号或预留信号。
可选的,N=1时,1个CCA时间段的持续时间为第一持续时间;
N>1时,所述N个CCA时间段包括初始CCA时间段、增强信道空闲检测ECCA时间段,所述N个CCA时间段设有延迟defer period时间段;其中,所述第一持续时间、所述初始CCA时间段的持续时间、所述defer period时间段的持续时间为所述ECCA时间段的持续时间的整数倍。
实施本发明实施例,具有如下有益效果:
基站在子帧内配置用于传输DRS的传输时间段和至少一个CCA时间段,至少一个CCA时间段位于DRS传输时间段的前面,这样基站可以在发送待传输DRS之前在CCA时间段内根据预设的策略检测信道状态,然后在DRS传输时间段内发送DRS,提高DRS发送的成功率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是现有的非授权频段信道的检测方法的示意图;
图2是本发明第一实施例提供的一种基于非授权频段的发现参考信号的配置方法的流程示意图;
图3a是本发明第二实施例提供的一种基于非授权频段的发现参考信号的配置方法的流程示意图;
图3b是图3a的发现参考信号的配置时序图;
图4a是本发明第三实施例提供的一种基于非授权频段的发现参考信号的配置方法的流程示意图;
图4b是图4a的发现参考信号的配置时序图;
图5a是本发明第四实施例提供的一种基于非授权频段的发现参考信号的配置方法的流程示意图;
图5b是图5a的发现参考信号的配置时序图;
图6是本发明实施例提供的一种基于非授权频段的发现参考信号的配置装置的结构示意图;
图7是本发明实施例提供的一种基站的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
参见图2,为本发明第一实施例提供的一种非授权频段的发现参考信号的配置方法的流程示意图,在本发明实施例中,所述方法包括:
S201、在子帧内配置待传输发现参考信号DRS的DRS传输时间段。
具体的,DRS包括多种下行参考信号,用于RRM测量、小区识别、下行同步、时频估计等,例如:DRS包括:SSS、PSS、CRS和CSI-RS中的一种或多个。DRS传输时间段为预设长度的时间区间,用来传输DRS。在LTE通信系统中,一个无线帧包含10个子帧,基站在配置待传输DRS的DRS传输时间段时,可以在一个或多个子帧中进行配置,DRS传输时间段在每个子帧中的位置是固定的,在一个无线帧中只有一个DRS传输时间段成功发送待传输DRS即可。
LTE通信系统中每个子帧包括14个symbol,基站配置DRS传输时间段时,可以根据待传输DRS的数据量从14个symbol中确定symbol数量和symbol位置,例如,在子帧内的第4个symbol至第7个symbol作为待传输DRS的DRS传输时间段,或子帧内第5个symbol至第10个symbol作为待传输DRS的DRS传输时间段。
S202、在所述子帧内配置N个CCA时间段;其中,N≥1且为整数。
具体的,CCA时间段表示预设长度的时间区间,用来监听非授权频段信道为空闲状态还是忙碌状态。在DRS传输时间段所在的子帧内配置N个CCA时间段,其中N个CCA时间段位于DRS传输时间段的前面,且不能与DRS传输时间段重合,N为大于等于1的整数。如果N>1,多个CCA时间段的持续时间可以相等或不相等,本发明不作限制。
可选的,N=1时,1个CCA时间段的持续时间为第一持续时间;
N>1时,所述N个CCA时间段包括初始CCA时间段、增强信道空闲检测ECCA时间段、所述N个CCA时间段设有延迟defer period时间段;其中,所述第一持续时间、所述初始CCA时间段的持续时间、所述defer period时间段的持续时间为所述ECCA时间段的持续时间的整数倍。
具体的,N=1时,基站配置CCA时间段的长度为第一持续时间;N>1时,基站配置的N个CCA时间段包括初始CCA时间段、ECCA时间段,而所述N个CCA时间段设有defer period时间段,其中,初始CCA时间段为首个CCA时间段,ECCA时间段为除首个CCA时间段之后的时间段,defer period时间段为在初始CCA时间段或ECCA时间段内监听到非授权频段信道为忙碌 状态时,下一ECCA时间段之前增加的时间段。基站在配置上述时间段的持续时间满足:第一持续时间、初始CCA时间段的持续时间、defer period时间段的持续时间为ECCA时间段的持续时间的整数倍。
实施本发明的实施例,基站在子帧内配置用于传输DRS的传输时间段和至少一个CCA时间段,至少一个CCA时间段位于DRS传输时间段的前面,这样基站可以在发送待传输DRS之前在CCA时间段内根据预设的策略检测信道状态,然后在DRS传输时间段内发送DRS,提高DRS发送的成功率。
参见图3a,为本发明第二实施例提供的一种基于非授权频段的发现参考信号配置方法的流程示意图,在本发明实施例中,所述方法包括:
S301、在子帧内配置待传输发现参考信号DRS的DRS传输时间段。
具体的,LTE通信系统的一个无线帧包括10个子帧,每个子帧包括两个时隙slot,每个时隙包括7个symbol,即1个子帧包括14个symbol。DRS用于实现RRM测量、下行同步、时频估计等功能,DRS包括多种类型的下行参考信号,例如PSS、SSS、CRS和CSI-RS中的一种或多种。DRS传输时间段为子帧内的预设长度的时间区间,用于发送待传输DRS。基站在子帧内配置待传输DRS的DRS传输时间段具体为:确定待传输DRS在子帧内占用的Symbol位置和Symbol数量。例如,待传输时间段为第4个symbol至第7个symbol组成的时间区间,共占用4个symbol;或待传输时间段为第5个symbol至第10个symbol组成的时间区间,共占用6个symbol。
S302、在所述子帧内配置N个CCA时间段;其中N=1,1个CCA时间段的结束时刻重合于所述DRS传输时间段的时刻。
具体的,N=1,基站在子帧内配置1个CCA时间段,该CCA时间段的结束时刻重合于S301配置的DRS传输时间段的起始时刻。
S303、在所述1个CCA时间段内监听到非授权频段信道为空闲状态时,在所述DRS传输时间段内发送所述待传输DRS。
具体的,CCA时间段为预设长度的时间区间,用来监听非授权频段信道的状态,基站在CCA时间段内测量非授权频段信道的接收信号功率,当接收信号功率小于预设功率时,表明非授权频段信道在CCA时间段内为空闲状态,反之,则表明非授权频段信道在CCA时间段内为忙碌状态。基站在S302配置 的1个CCA时间段内监听到非授权频段信道为空闲状态时,在S301配置的DRS传输时间段内发送待传输DRS。
可选的,当基站需要发送下行数据时,获取待传输下行数据的数据传输时间段,在DRS传输时间段的起始时刻位于数据传输时间段内的情况下,不执行CCA检测流程,直接通过DRS传输时间段发送待传输DRS。
具体的,下行数据不包括DRS,基站通过CCA机制或ECCA机制获得非授权频段信道的使用权后,占用非授权频段信道一定的时间长度,该一定的时间长度即对应本实施例的数据传输时间段,用来发送待传输下行数据。例如,基站需要发送下行数据时,触发LBE下的CCA机制,在CCA时间段内检测到非授权频段信道为空闲状态时,确定待传输下行数据的数据传输时间段,数据传输时间段的最大持续时间为6.5ms(q=16时);当基站需要传输下行数据时,在初始CCA时间段内监听到非授权频段信道为忙碌状态时,取一个随机数M,1≤M≤q,4≤q≤32,后续每检测到非授权频段信道为空闲状态时,M的值减1,在M=0时,确定待传输下行数据的数据传输时间段,数据传输时间段的最大持续时间为6.5ms;其中首个CCA时间段为初始CCA时间段,后续除首个CCA时间段为ECCA时间段,每个ECCA时间段的持续时间小于初始CCA时间段的持续时间;当在初始CCA或ECCA时间段检测到非授权频段信道为忙碌状态时,M值不变,并在下一ECCA时间段之前需要增加预设时长,该预设时长大于等于defer period,只有在持续检测到信道空闲时间达到defer period值时,才能再次以ECCA检测时间粒度进行信道检测,若在ECCA时间检测到信道空闲,M再次开始递减。defer period可以设为0。
上述可以看出,数据传输时间段占用多个子帧,其持续时间远大于DRS传输时间段的持续时间,如果S301配置的DRS传输时间段的起始时刻是位于下行数据的数据传输时间段内,则DRS传输时间段内非授权频段信道必然为空闲状态,因此不需要在DRS传输时间段之前执行CCA流程,可以在DRS传输时间段内直接发送DRS。
示例性的,参见图3b,下面根据图3b对本发明实施例的基于非授权频段的发现参考信号的配置方法进行详细的说明,LTE通信系统中一个无线帧包括10个子帧,每个子帧包括14个symbol,基站在子帧4内配置DRS传输时间 段,DRS传输时间段占用第4个symbol至第7个symbol,基站在子帧4内配置1个CCA时间段,CCA时间段的结束时刻重合于DRS传输时间段的起始时刻。基站在CCA时间段内监听到非授权频段信道为空闲状态时,在DRS传输时间段内发送待传输DRS。
参见图4a,为本发明第三实施例提供的一种基于非授权频段的发现参考信号的配置方法的流程示意图,在本发明实施例中,所述方法包括:
S401、在子帧内配置待传输发现参考信号DRS的DRS传输时间段。
具体的,LTE通信系统的一个无线帧包括10个子帧,每个子帧包括两个时隙slot,每个时隙包括7个symbol,即1个子帧包括14个symbol。DRS用于实现RRM测量、下行同步、时频估计等功能,DRS包括多种类型的下行参考信号,例如,DRS包括PSS、SSS、CRS和CSI-RS中的一种或多种。DRS传输时间段为子帧内预设长度的时间区间,DRS传输时间段的长度取决于待传输DRS的数据量,与待传输DRS的数据量成正比。基站在子帧内配置待传输DRS的DRS传输时间段具体为:确定待传输DRS在子帧内占用的symbol位置和symbol数量。例如,待传输时间段为第4个symbol至第7个symbol组成的时间区间,共占用4个symbol;或待传输时间段为第5个symbol至第10个symbol组成的时间区间,共占用6个symbol。
S402、在所述子帧内配置N个CCA时间段;其中,N=1。
具体的,N=1,基站在子帧内配置1个CCA时间段,该1个CCA时间段的位于DRS传输时间段的前面。
S403、在1个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段。
具体的,指定信号传输时间段用于传输指定信号,指定信号包括初始信号initial signal或预留信号reservation signal,指定信号传输时间段为预设长度的时间区间,其位于S402配置的1个CCA传输时间段和S401配置的DRS传输时间段之间,即指定信号传输时间段的起始时刻重合于CCA传输时间段的结束时刻,指定信号传输时间段的结束时刻重合于DRS传输时间段的起始时刻。
S404、在所述1个CCA时间段内监听到非授权频段信道为空闲状态时,通过所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时 间段发送所述待传输DRS。
具体的,CCA时间段为预设长度的时间区间,用来监听非授权频段信道的状态,基站在CCA时间段测量非授权频段信道的接收信号功率,若接收信号功率小于预设功率,表明非授权频段信道为空闲状态,反之,则表明非授权频段信道为忙碌状态。基站在S402配置的1个CCA时间段内监听到非授权频段信道为空闲状态时,在指定信号传输时间段内发送指定信号,指定信号传输时间段结束时,在DRS传输时间段内发送待传输DRS给用户设备。
可选的,指定信号传输时间段的持续时间为满足指定信号的传输条件的最小值。
可选的,当基站需要发送下行数据时,获取待传输下行数据的数据传输时间段,在DRS传输时间段的起始时刻位于数据传输时间段内的情况下,不执行CCA检测流程,直接通过DRS传输时间段发送待传输DRS。
具体的,下行数据不包括DRS,基站通过CCA机制或ECCA机制获得非授权频段信道的使用权后,占用非授权频段信道一定的时间长度,该一定的时间长度即对应本实施例的数据传输时间段,用来发送待传输下行数据。例如,基站需要发送下行数据时,触发LBE的CCA机制,在初始CCA时间段内检测到非授权频段信道为空闲状态时,确定待传输下行数据的数据传输时间段,数据传输时间段的最大持续时间为6.5ms(q=16时);当基站需要传输下行数据时,在初始CCA时间段内监听到非授权频段信道为忙碌状态时,取一个随机数M,1≤M≤q,4≤q≤32,后续每检测到非授权频段信道为空闲状态时,M的值减1,在M=0时,确定待传输下行数据的数据传输时间段,数据传输时间段的最大持续时间为6.5ms;其中首个CCA时间段为初始CCA时间段,后续除首个CCA时间段为ECCA时间段,每个ECCA时间段的持续时间小于初始CCA时间段的持续时间;当在初始CCA或ECCA时间段检测到非授权频段信道为忙碌状态时,下一ECCA时间段之前需要增加预设时长,该预设时长大于等于defer period,只有在持续检测到信道空闲时间达到defer period值时,才能再次以ECCA检测时间粒度进行信道检测,若在ECCA时间检测到信道空闲,M再次开始递减。defer period可以设为0。
上述可以看出,数据传输时间段占用多个子帧,其持续时间远大于DRS 传输时间段的持续时间,如果配置的DRS传输时间段的起始时刻是位于下行数据的数据传输时间段内,则DRS传输时间段内非授权频段信道必然为空闲状态,因此不需要在DRS传输时间段之前执行CCA流程,不发送指定信号,可以在DRS传输时间段内直接发送DRS。
示例性的,参见图4b,下面根据图4b对本发明实施例的基于非授权频段的发现参考信号的配置方法进行详细的说明,LTE通信系统中一个无线帧包括10个子帧,每个子帧包括14个symbol,基站在子帧4内配置DRS传输时间段,DRS传输时间段占用第4个symbol至第7个symbol,基站在子帧4内配置1个CCA时间段和指定信号传输时间段,指定信号传输时间段占用第2个symbol和第3个symbol,CCA时间段的结束时刻重合于指定信号传输时间段的起始时刻。基站在CCA时间段内监听到非授权频段信道为空闲状态时,在指定信号传输时间段发送指定信号,以及DRS传输时间段内发送待传输DRS。
实施本发明的实施例,基站在子帧内配置用于传输DRS的传输时间段和至少一个CCA时间段,至少一个CCA时间段位于DRS传输时间段的前面,这样基站可以在发送待传输DRS之前在CCA时间段内根据预设的策略检测信道状态,然后在DRS传输时间段内发送DRS,提高DRS发送的成功率。
参见图5a,为本发明实施例提供的一种基于非授权频段的发现参考信号的配置方法的流程示意图,在本发明实施例中,所述方法包括:
S501、在子帧内配置待传输发现参考信号DRS的DRS传输时间段。
具体的,具体的,LTE通信系统的一个无线帧包括10个子帧,每个子帧包括两个时隙slot,每个时隙包括7个symbol,即1个子帧包括14个symbol。DRS用于实现RRM测量、下行同步、时频估计等功能,DRS包括多种类型的下行参考信号,例如,DRS包括PSS、SSS、CRS和CSI-RS中的一种或多种。DRS传输时间段为子帧内预设长度的时间区间,DRS传输时间段的长度取决于待传输DRS的数据量,与待传输DRS的数据量成正比。基站在子帧内配置待传输DRS的DRS传输时间段具体为:确定待传输DRS在子帧内占用的symbol位置和symbol数量。例如,待传输时间段为第4个symbol至第7个symbol组成的时间区间,共占用4个symbol;或待传输时间段为第5个symbol至第10个symbol组成的时间区间,共占用6个symbol。
S502、在所述子帧内配置N个CCA时间段;其中,N>1。
具体的,基站在子帧内配置多个CCA时间段,其中每个CCA时间段的持续时间可以相同或不相同,CCA时间段的持续时间取决于基站采用的CCA机制。N个CCA时间段位于DRS传输时间段的前面。
S503、在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段。
具体的,指定信号传输时间段用于传输指定信号,指定信号包括初始信号initial signal或预留信号reservation signal,指定信号传输时间段为预设长度的时间区间,其位于S402配置的N个CCA传输时间段和S401配置的DRS传输时间段之间,即指定信号传输时间段的起始时刻重合于N个CCA传输时间段的结束时刻,指定信号传输时间段的结束时刻重合于DRS传输时间段的起始时刻。
S504、在所述N个CCA时间段内监听到非授权频段信道为空闲状态的次数达到预设次数时,确定所述N个CCA时间段中未使用的CCA时间段。
具体的,当使用LBE机制时,基站若在初始CCA时间段检测到非授权频段信道为忙碌状态,则触发ECCA检测流程。取一个随机数M,1≤M≤q,4≤q≤32,后续在ECCA时间内每检测到非授权频段信道为空闲状态时,M的值减1。若检测到信道忙,则M不变,且开启defer period时间,只有检测到信道空闲持续时间达到defer period时间时,才能再次以ECCA检测时间检测信道,若在ECCA时间内检测信道空闲时,M才能再次开始递减,M=0时,才能发送数据。而这里的检测到信道空闲就意味着M递减为0时。也就是当M=0时,即计数值达到预设次数时,确定N个CCA时间段中未使用的CCA时间段。例如,基站配置有16个CCA时间段,基站在初始CCA时间段检测到信道忙,开启defer period,并配置随机数M值取8,基站依次在每个ECCA时间段内监听非授权频段信道的状态,当M=0时,确定当前ECCA时间段为第12个CCA时间段,则未使用的CCA时间段为第13至第16个CCA时间段,共4个CCA时间段未使用,其中未使用的4个CCA时间段为ECCA时间段。
S505、通过所述未使用的CCA时间段和所述指定信号传输时间段发送所 述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
具体的,基站通过S504中未使用的CCA时间段和S503中配置的指定信号传输时间段传输指定信号,以及通过DRS传输时间段发送待传输DRS。
例如,基站确定未使用的CCA时间段为第13至第16个CCA时间段,基站通过上述4个CCA时间段和指定信号传输时间段发送指定信号,通过DRS传输时间段发送待传输DRS。
可选的,指定信号传输时间段的持续时间为满足指定信号的传输条件的最小值。
可选的,当基站需要发送下行数据时,获取待传输下行数据的数据传输时间段,在DRS传输时间段的起始时刻位于数据传输时间段内的情况下,不执行CCA检测流程,直接通过DRS传输时间段发送待传输DRS。
具体的,下行数据不包括DRS,基站通过CCA机制或ECCA机制获得非授权频段信道的使用权后,占用非授权频段信道一定的时间长度,该一定的时间长度即对应本实施例的数据传输时间段,用来发送待传输下行数据。例如,基站需要发送下行数据时,触发LBE的CCA机制,在初始CCA时间段内检测到非授权频段信道为空闲状态时,确定待传输下行数据的数据传输时间段,数据传输时间段的最大持续时间为6.5ms(q=16时);当基站需要传输下行数据时,在CCA时间段内监听到非授权频段信道为忙碌状态时,取一个随机数M,1≤M≤q,4≤q≤32,后续每检测到非授权频段信道为空闲状态时,M的值减1,在M=0时,确定待传输下行数据的数据传输时间段,数据传输时间段的最大持续时间为6.5ms;其中首个CCA时间段为初始CCA时间段,后续除首个CCA时间段为ECCA时间段,每个ECCA时间段的持续时间小于初始CCA时间段的持续时间;当在初始CCA或ECCA时间段检测到非授权频段信道为忙碌状态时,下一ECCA时间段之前需要增加预设时长,该预设时长大于等于defer period,只有在持续检测到信道空闲时间达到defer period值时,才能再次以ECCA检测时间粒度进行信道检测,若在ECCA时间检测到信道空闲,M再次开始递减。defer period可以设为0。
上述可以看出,数据传输时间段占用多个子帧,其持续时间远大于DRS传输时间段的持续时间,如果配置的DRS传输时间段的起始时刻是位于下行 数据的数据传输时间段内,则DRS传输时间段内非授权频段信道必然为空闲状态,因此不需要在DRS传输时间段之前执行CCA流程,不发送指定信号,可以在DRS传输时间段内直接发送DRS。
需要说明的是,当基站需要发送下行数据时,基站在CCA时间段内监听到非授权频段信道为空闲状态,如果该CCA时间段的起始时刻与DRS传输时间段的结束时刻之间的时长小于一定阈值时,在发送下行数据之前不需要发送指定信号,直接发送下行数据。也就是说DRS发送结束时长小于一定阀值时,下行数据开始发送,则下行数据发送之前可以不发送指定信号。
示例性的,参见图5b,下面根据图5b对本发明实施例的基于非授权频段的发现参考信号的配置方法进行详细的说明,LTE通信系统中一个无线帧包括10个子帧,每个子帧包括14个symbol,基站在子帧4内配置DRS传输时间段,DRS传输时间段占用第4个symbol至第7个symbol,基站在子帧4内配置多个CCA时间段和指定信号传输时间段,指定信号传输时间段占用第2个symbol和第3个symbol,多个CCA时间段的结束时刻重合于指定信号传输时间段的起始时刻。基站在在多个CCA时间段内监听到非授权频段信道为空闲状态的次数达到预设次数时,确定未使用的CCA时间段,在未使用的CCA时间段和指定信号传输时间段发送指定信号,以及在DRS传输时间段内发送待传输DRS。
实施本发明的实施例,基站在子帧内配置用于传输DRS的传输时间段和至少一个CCA时间段,至少一个CCA时间段位于DRS传输时间段的前面,这样基站可以在发送待传输DRS之前在CCA时间段内根据预设的策略检测信道状态,然后在DRS传输时间段内发送DRS,提高DRS发送的成功率。
参见图6,为本发明实施例提供的一种基于非授权频段的发现参考信号的配置装置的结构示意图,在本发明实施例中,所述配置装置包括第一配置模块601和第二配置模块602。
第一配置模块601,用于在子帧内配置待传输发现参考信号DRS的DRS传输时间段。
第二配置模块602,用于在所述子帧内配置N个CCA时间段;其中,N≥1且为整数,所述N个CCA时间段位于所述DRS传输时间段的前面。
本发明实施例的配置装置用于实现方法实施例一的配置方法,和方法实施例一基于同一构思,其带来的技术效果也相同,具体原理请参照方法实施例一的描述,此处不再赘述。
可选的,配置装置还包括:
第一发送模块,用于在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,在所述DRS传输时间段内发送所述待传输DRS;其中,N=1,1个CCA时间段的结束时刻重合于所述DRS传输时间段的起始时刻。
可选的,配置装置还包括:
第三配置模块,用于在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N=1,所述指定信号包括初始信号或预留信号;
第二发送模块,用于在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,通过所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
可选的,配置装置还包括:
第四配置模块,用于在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N>1,所述指定信号包括初始信号或预留信号;
确定模块,用于在所述N个CCA时间段内监听到非授权频谱信道为空闲状态的次数达到预设次数时,确定所述N个CCA时间段中未使用的CCA时间段;
第三发送模块,用于通过所述未使用的CCA时间段和所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
可选的,所述指定信号传输时间段的持续时间为满足所述指定信号的传输条件的最小值。
可选的,配置装置还包括:
第四发送模块,用于获取待传输下行数据的数据传输时间段;
在所述DRS传输时间段的起始时刻位于所述数据传输时间段内的情况下, 不执行CCA流程,不发送所述指定信号,直接通过所述DRS传输时间段发送所述待传输DRS。
可选的,N=1时,1个CCA时间段的持续时间为第一持续时间;
N>1时,所述N个CCA时间段包括初始CCA时间段、增强信道空闲检测ECCA时间段,所述N个CCA时间段设有延迟defer period时间段;其中,所述第一持续时间、所述初始CCA时间段的持续时间、所述defer period时间段的持续时间为所述ECCA时间段的持续时间的整数倍。
上述发明实施例和方法实施例二至四基于同一构思,其带来的技术效果也相同,具体原理请参照方法实施例二至四的描述,此处不再赘述。
请参见图7,图7提供了本发明实施例中的一种基站的结构示意图,如图7所示,所述基站包括通信总线702、输入装置703、输出装置704、存储器705以及处理器701,其中:
所述通信总线702,用于实现所述输入装置703、输出装置704、存储器705以及处理器701之间的连接通信;
所述存储器705中存储一组程序代码,且所述基站调用所述存储器705中存储的程序代码,用于执行以下操作:
所述处理器701在子帧内配置待传输发现参考信号DRS的DRS传输时间段;
所述处理器701在所述子帧内配置N个CCA时间段;其中,N≥1且为整数,所述N个CCA时间段位于所述DRS传输时间段的前面。
可选的,所述处理器701在所述子帧内配置N个CCA时间段之后,还执行以下操作:
所述处理器701在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,所述输出装置704在所述DRS传输时间段内发送所述待传输DRS;其中,N=1,1个CCA时间段的结束时刻重合于所述DRS传输时间段的起始时刻。
可选的,所述处理器701在所述子帧内配置N个CCA时间段之后,还执行以下操作:
所述处理器701在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N=1,所述指定信号包括初始信号或预留信号;
所述处理器701在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,所述输出装置704通过所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
可选的,所述处理器701在所述子帧内配置N个CCA时间段和用于传输指定信号的指定信号传输时间段之后,还执行以下操作:
所述处理器701在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N>1,所述指定信号包括初始信号或预留信号;
所述处理器701在所述N个CCA时间段内监听到非授权频谱信道为空闲状态的次数达到预设次数时,确定所述N个CCA时间段中未使用的CCA时间段;
所述输出装置704通过所述未使用的CCA时间段和所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
可选的,所述指定信号传输时间段的持续时间为满足所述指定信号的传输条件的最小值。
可选的,所述处理器701还执行以下操作:
所述处理器701获取待传输下行数据的数据传输时间段;
所述输出装置704在所述DRS传输时间段的起始时刻位于所述数据传输时间段内的情况下,不执行CCA流程,不发送指定信号,直接通过所述DRS传输时间段发送所述待传输DRS;其中,所述指定信号包括初始信号或预留信号。
可选的,N=1时,1个CCA时间段的持续时间为第一持续时间;
N>1时,所述N个CCA时间段包括初始CCA时间段、增强信道空闲检测ECCA时间段,所述N个CCA时间段设有延迟defer period时间段;其中,所述第一持续时间、所述初始CCA时间段的持续时间、所述defer period时间段的持续时间为所述ECCA时间段的持续时间的整数倍。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程,是可以通过计算机程序来指令相关的硬件来完成,所述的程序可存储于一计算机可读取存储介质中,该程序在执行时,可包括如上述各方法的实施例的流程。其中,所述的存储介质可为磁碟、光盘、只读存储记忆体(Read-Only Memory,ROM)或随机存储记忆体(Random Access Memory,RAM)等。
以上所揭露的仅为本发明一种较佳实施例而已,当然不能以此来限定本发明之权利范围,本领域普通技术人员可以理解实现上述实施例的全部或部分流程,并依本发明权利要求所作的等同变化,仍属于发明所涵盖的范围。

Claims (21)

  1. 一种基于非授权频段的发现参考信号的配置方法,其特征在于,包括:
    在子帧内配置待传输发现参考信号DRS的DRS传输时间段;
    在所述子帧内配置N个CCA时间段;其中,N≥1且为整数,所述N个CCA时间段位于所述DRS传输时间段的前面。
  2. 如权利要求1所述的方法,其特征在于,所述在所述子帧内配置N个CCA时间段之后,还包括:
    在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,在所述DRS传输时间段内发送所述待传输DRS;其中,N=1,1个CCA时间段的结束时刻重合于所述DRS传输时间段的起始时刻。
  3. 如权利要求1所述的方法,其特征在于,所述在所述子帧内配置N个CCA时间段之后,还包括:
    在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N=1,所述指定信号包括初始信号或预留信号;
    在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,通过所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
  4. 根据权要求1所述的方法,其特征在于,所述在所述子帧内配置N个CCA时间段和用于传输指定信号的指定信号传输时间段之后,还包括:
    在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N>1,所述指定信号包括初始信号或预留信号;
    在所述N个CCA时间段内监听到非授权频谱信道为空闲状态的次数达到预设次数时,确定所述N个CCA时间段中未使用的CCA时间段;
    通过所述未使用的CCA时间段和所述指定信号传输时间段发送所述指定 信号,以及通过所述DRS传输时间段发送所述待传输DRS。
  5. 如权利要求3或4所述的方法,其特征在于,所述指定信号传输时间段的持续时间为满足所述指定信号的传输条件的最小值。
  6. 如权利要求1所述的方法,其特征在于,还包括:
    获取待传输下行数据的数据传输时间段;
    在所述DRS传输时间段的起始时刻位于所述数据传输时间段内的情况下,不执行CCA流程,不发送指定信号,直接通过所述DRS传输时间段发送所述待传输DRS;其中,所述指定信号包括初始信号或预留信号。
  7. 如权利要求1所述的方法,其特征在于,
    N=1时,1个CCA时间段的持续时间为第一持续时间;
    N>1时,所述N个CCA时间段包括初始CCA时间段、增强信道空闲检测ECCA时间段,所述N个CCA时间段设有延迟defer period时间段;其中,所述第一持续时间、所述初始CCA时间段的持续时间、所述defer period时间段的持续时间为所述ECCA时间段的持续时间的整数倍。
  8. 一种基于非授权频段的发现参考信号的配置装置,其特征在于,包括:
    第一配置模块,用于在子帧内配置待传输发现参考信号DRS的DRS传输时间段;
    第二配置模块,用于在所述子帧内配置N个CCA时间段;其中,N≥1且为整数,所述N个CCA时间段位于所述DRS传输时间段的前面。
  9. 如权利要求8所述的装置,其特征在于,还包括:
    第一发送模块,用于在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,在所述DRS传输时间段内发送所述待传输DRS;其中,N=1,1个CCA时间段的结束时刻重合于所述DRS传输时间段的起始时刻。
  10. 如权利要求8所述的装置,其特征在于,还包括:
    第三配置模块,用于在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N=1,所述指定信号包括初始信号或预留信号;
    第二发送模块,用于在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,通过所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
  11. 根据权要求8所述的装置,其特征在于,还包括:
    第四配置模块,用于在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N>1,所述指定信号包括初始信号或预留信号;
    确定模块,用于在所述N个CCA时间段内监听到非授权频谱信道为空闲状态的次数达到预设次数时,确定所述N个CCA时间段中未使用的CCA时间段;
    第三发送模块,用于通过所述未使用的CCA时间段和所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
  12. 如权利要求10或11所述的装置,其特征在于,所述指定信号传输时间段的持续时间为满足所述指定信号的传输条件的最小值。
  13. 如权利要求8所述的装置,其特征在于,还包括:
    第四发送模块,用于获取待传输下行数据的数据传输时间段;
    在所述DRS传输时间段的起始时刻位于所述数据传输时间段内的情况下,不执行CCA流程,不发送指定信号,直接通过所述DRS传输时间段发送所述待传输DRS;其中,所述指定信号包括初始信号或预留信号。
  14. 如权利要求8所述的装置,其特征在于,
    N=1时,1个CCA时间段的持续时间为第一持续时间;
    N>1时,所述N个CCA时间段包括初始CCA时间段、增强信道空闲检测ECCA时间段,所述N个CCA时间段设有延迟defer period时间段;其中,所述第一持续时间、所述初始CCA时间段的持续时间、所述defer period时间段的持续时间为所述ECCA时间段的持续时间的整数倍。
  15. 一种基站,其特征在于,包括通信总线、输入装置、输出装置、存储器以及处理器,其中:
    所述通信总线,用于实现所述输入装置、输出装置、存储器以及处理器之间的连接通信;
    所述存储器中存储一组程序代码,且所述基站调用所述存储器中存储的程序代码,用于执行以下操作:
    所述处理器在子帧内配置待传输发现参考信号DRS的DRS传输时间段;
    所述处理器在所述子帧内配置N个CCA时间段;其中,N≥1且为整数,所述N个CCA时间段位于所述DRS传输时间段的前面。
  16. 如权利要求15所述的基站,其特征在于,所述处理器在所述子帧内配置N个CCA时间段之后,还执行以下操作:
    所述处理器在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,所述输出装置在所述DRS传输时间段内发送所述待传输DRS;其中,N=1,1个CCA时间段的结束时刻重合于所述DRS传输时间段的起始时刻。
  17. 如权利要求15所述的基站,其特征在于,所述处理器在所述子帧内配置N个CCA时间段之后,还执行以下操作:
    所述处理器在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N=1,所述指定信号包括初始信号或预留信号;
    所述处理器在所述N个CCA时间段内监听到非授权频段信道为空闲状态时,所述输出装置通过所述指定信号传输时间段发送所述指定信号,以及通过 所述DRS传输时间段发送所述待传输DRS。
  18. 根据权要求15所述的基站,其特征在于,所述处理器在所述子帧内配置N个CCA时间段和用于传输指定信号的指定信号传输时间段之后,还执行以下操作:
    所述处理器在所述N个CCA时间段的结束时刻和所述DRS传输时间段的起始时刻之间配置用于传输指定信号的指定信号传输时间段;其中N>1,所述指定信号包括初始信号或预留信号;
    所述处理器在所述N个CCA时间段内监听到非授权频谱信道为空闲状态的次数达到预设次数时,确定所述N个CCA时间段中未使用的CCA时间段;
    所述输出装置通过所述未使用的CCA时间段和所述指定信号传输时间段发送所述指定信号,以及通过所述DRS传输时间段发送所述待传输DRS。
  19. 如权利要求17或18所述的基站,其特征在于,所述指定信号传输时间段的持续时间为满足所述指定信号的传输条件的最小值。
  20. 如权利要求15所述的基站,其特征在于,所述处理器还执行以下操作:
    所述处理器获取待传输下行数据的数据传输时间段;
    所述输出装置在所述DRS传输时间段的起始时刻位于所述数据传输时间段内的情况下,不执行CCA流程,不发送指定信号,直接通过所述DRS传输时间段发送所述待传输DRS;其中,所述指定信号包括初始信号或预留信号。
  21. 如权利要求15所述的基站,其特征在于,
    N=1时,1个CCA时间段的持续时间为第一持续时间;
    N>1时,所述N个CCA时间段包括初始CCA时间段、增强信道空闲检测ECCA时间段,所述N个CCA时间段设有延迟defer period时间段;其中,所述第一持续时间、所述初始CCA时间段的持续时间、所述defer period时间段的持续时间为所述ECCA时间段的持续时间的整数倍。
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