WO2017004901A1 - 信道占用概率的调整方法、调整系统和基站 - Google Patents

信道占用概率的调整方法、调整系统和基站 Download PDF

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Publication number
WO2017004901A1
WO2017004901A1 PCT/CN2015/091369 CN2015091369W WO2017004901A1 WO 2017004901 A1 WO2017004901 A1 WO 2017004901A1 CN 2015091369 W CN2015091369 W CN 2015091369W WO 2017004901 A1 WO2017004901 A1 WO 2017004901A1
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Prior art keywords
channel detection
channel
contention window
transmission object
window length
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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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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • 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]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for adjusting channel occupancy probability, a channel occupancy probability adjustment system, and a base station.
  • 3GPP The 3 rd Generation Partnership Project, the third generation mobile communications partner organization
  • 3GPP is discussing how to use unlicensed spectrum, such as the 2.4 GHz and 5 GHz bands, with the help of licensed spectrum.
  • unlicensed spectrum are currently mainly used in systems such as Wi-Fi, Bluetooth, radar, and medical.
  • LAA LTE Assisted Access
  • SDL downlink
  • TDD Time Division Duplex
  • DC Dual Connectivity
  • LTE systems operating in unlicensed bands have the ability to provide higher spectral efficiency and greater coverage, while relying on the same core network to allow data traffic between licensed and unlicensed bands. Sew switch. For the user, this means a better broadband experience, higher speed, better stability and mobility.
  • Wi-Fi Wireless Fidelity
  • CSMA/CD Carrier Sense Multiple Access/Collision Detection
  • the basic principle of this method is Wi-Fi. Before the AP (Access Point) or the terminal sends signaling or data, it must first monitor whether other APs or other terminals are transmitting/receiving signaling or data. If so, continue to listen until it is monitored. If not, a random number is generated as the backoff time. If no signaling or data transmission is detected during this backoff time, the AP or the terminal may start transmitting signaling or data after the end of the backoff time. The process is shown in Figure 2.
  • CSMA/CD Carrier Sense Multiple Access/Collision Detection
  • the LTE network has good orthogonality to ensure the interference level, the uplink and downlink transmissions between the base station and the user do not need to consider whether other base stations or other users are transmitting data. If LTE is used on an unlicensed band, it does not consider whether other devices are using unlicensed bands nearby, which will cause great interference to Wi-Fi devices. Because LTE transmits as long as there is traffic, there is no monitoring rule, then the Wi-Fi device cannot transmit when LTE has service transmission, and can only detect the channel idle state for data transmission after the LTE service transmission is completed.
  • LAA LTE assisted access
  • Wi-Fi existing access technologies
  • LTE LTE assisted access
  • 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.
  • a LBT mechanism based on frame-based (FBE) (as shown in Figure 3) is proposed.
  • the left slash is the channel detection time of CCA (Clear Channel Assessment).
  • the CCA detection time is periodically repeated. If the channel is idle, the channel is occupied. After the channel occupancy time reaches the maximum channel occupation time, there is an idle time. At the idle time, the transmission 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 occupancy time. The idle time plus the maximum time occupied by the channel is the period.
  • LBT-based LBT mechanism is cycle-free. As long as the service arrives, the CCA detection is triggered. If the CCA detects idle. , immediately send signaling or data; if the channel is detected to be busy, take a random number N, N ranges from 1 to q (ie, the length of the contention window), and q ranges from 4 to 32.
  • the extended CCA (extended channel detection time) mechanism is adopted, that is, the random value N, N ranges from 1 to 16. If the value is 8, it means that in the next consecutive CCA detection time.
  • the channel is detected every CCA detection time. If the channel is detected to be idle, N-1, if the channel is detected to be busy, N is unchanged, and when N is 0, signaling or data is sent.
  • the LBE adopts different initialCCA (initial channel detection time) and extended CCA (ECCA, extended channel detection time) values, such as the first CCA detection, called initial CCA, This time granularity is relatively large, such as 34us; when the channel is busy or the channel occupancy time is cut off, the time granularity of the ECCA is relatively small, such as 9us.
  • initial CCA initial channel detection time
  • ECCA extended channel detection time
  • the uplink PUSCH Physical Uplink Shared Channel
  • the UL grant uplink grant indication
  • the PDCCH Physical Downlink Control Channel
  • the EPDCCH Enhanced Physical Downlink Control Channel
  • Perform downlink LBT detection that is, the eNB performs downlink LBT detection first, and then sends a UL grant; after receiving the UL grant, the UE (terminal) performs uplink LBT detection, and then transmits the PUSCH, making the UL PUSCH more difficult to transmit;
  • the UL grant of the PUSCH resource scheduling the LAA is sent by the PDCCH or the EPDCCH on the licensed spectrum.
  • the eNB is When the UL grant is sent, it is transmitted on the licensed spectrum. Therefore, the downlink LBT detection is not performed. After the scheduled UE receives the UL grant, the uplink LBT detection is performed, and then the PUSCH is transmitted, so that the PUSCH is easily transmitted.
  • the present invention is based on the above problems, and proposes a new technical solution.
  • different LBT channel detection mechanisms or parameters are set, so that the sending object with the highest priority ranking can occupy the channel preferentially, that is, The probability of occupying the channel of the transmission target with the highest priority is effectively improved, thereby improving the uplink throughput performance of the LAA system.
  • a method for adjusting a channel occupancy probability is provided, where the method is used for: determining, by a base station, a first sending object and a second sending object to be sent by the base station, where The priority of a sending object is higher than the priority of the second sending object; determining whether the LBT channel detecting mechanism is used when the first sending object is sent; if the determining is no, directly sending the first sending object, And transmitting an LBT channel detection mechanism when transmitting the second transmission object; when the determination is yes, adjusting parameter information of the LBT channel detection mechanism corresponding to the first transmission object and the second transmission object respectively, so that The probability of transmitting the first transmission object occupying the channel is greater than the probability of transmitting the second transmission object occupying the channel.
  • different LBT channel detection mechanisms or parameter information of the LBT channel detection mechanism are set for different transmission objects of the base station, so that the probability of preempting the channel is distinguished according to the priority, that is, the priority of the transmission target with the highest priority is increased.
  • the probability of the channel in particular, the first transmission object ranked first for priority may be directly transmitted without performing LBT channel detection, and the second transmission object with lower priority ranking must perform LBT channel detection before transmission, thus, Obviously, the probability that the first transmitting object occupies the channel can be increased, thereby improving the uplink throughput of the LAA system.
  • the LBT channel detection needs to be performed when both the first sending object and the second sending object are sent, different objects can be sent by adjusting.
  • the parameter information of the corresponding LBT channel detection mechanism is used to improve the probability of occupying the occupied channel of the priority ranking object, thereby improving the uplink throughput of the LAA system.
  • the adjustment sends the first The parameter information of the LBT channel detection mechanism corresponding to the sending object and the second sending object, respectively, so that the probability that the first transmitting object occupies the channel is greater than the probability that the second transmitting object occupies the channel, specifically:
  • the first channel detection time granularity of the LBT channel detection mechanism corresponding to the first transmission object is adjusted to be smaller than the second channel detection time granularity of the LBT channel detection mechanism corresponding to the second transmission object, where
  • the first channel detection time granularity and the second channel detection time granularity include: initial channel detection time granularity and extended channel detection time granularity; and/or the first to be transmitted when the load-based LBT channel detection mechanism is used
  • the first channel detection threshold of the LBT channel detection mechanism corresponding to the transmission object is adjusted to be greater than a second channel detection threshold for transmitting the LBT channel detection mechanism corresponding to the second transmission object; and/or determining to send the first transmission object a type of the LBT
  • the parameter information of the LBT channel detection mechanism specifically includes: (1) detecting the time granularity by adjusting the channel, that is, making the first channel detection time granularity of the LBT channel detection mechanism corresponding to the first transmission object (for example, 20us)
  • the second channel detection time granularity (for example, 34 us) of the LBT channel detection mechanism corresponding to the second transmission object is transmitted, so that the probability of transmitting the occupied channel of the first transmission object is improved by shortening the channel detection time granularity, and priority is given.
  • the channel occupies a channel for data transmission, wherein, when the load-based LBT channel detection mechanism is used, the channel detection time granularity includes at least an initial channel detection time granularity (initial CCA slot) and an extended channel detection time granularity (ECCA slot);
  • the channel detection threshold that is, to enable transmission of the LBT channel corresponding to the first transmission object
  • the first channel detection threshold of the measurement mechanism is greater than the second channel detection threshold of the LBT channel detection mechanism corresponding to the second transmission object, so that the channel interference threshold can be increased by increasing the channel detection threshold, thereby improving the transmission first.
  • the probability of transmitting the occupied channel of the object (3) further refining the parameter information according to the type of the LBT channel detecting mechanism corresponding to the transmission of the different transmitting object, so as to improve the sending object with the highest priority ranking The probability of occupying the channel, thereby increasing the upstream throughput of the LAA system.
  • the determining is performed to send a type of an LBT channel detection mechanism respectively corresponding to the first sending object and the second sending object, to send the first sending object according to the type adjustment
  • the parameter information of the LBT channel detection mechanism corresponding to the second sending object specifically includes: when determining to send the LBT channel detecting mechanism based on the frame structure corresponding to the first sending object and the second sending object And adjusting a repetition period of the first channel detection time corresponding to the first transmission object to be smaller than a repetition period of sending the second channel detection time corresponding to the second transmission object; and determining to send the first And adjusting the parameter information of the LBT channel detection mechanism corresponding to the first sending object and the second sending object respectively, where the sending object and the second sending object are the load-based LBT channel detecting mechanism, including : adjusting a first contention window length of the extended channel detection time corresponding to the first transmission object to be smaller than sending a second contention window length of the extended channel detection time corresponding to the second transmission object; and/or a first delay
  • the frame structure (FBE)-based LBT channel detection mechanism corresponding to the first transmission object and the second transmission object when it is determined that the frame structure (FBE)-based LBT channel detection mechanism corresponding to the first transmission object and the second transmission object is sent, by repeating the repetition period of the channel detection time, specifically, sending the first
  • the repetition period of the first channel detection time corresponding to the transmission object is smaller than the repetition period of the second channel detection time corresponding to the second transmission object, that is, the number of times of channel detection for transmitting the first transmission object is increased in the same time.
  • a contention window length and/or a defer period of an extended channel detection time when the channel is detected to be busy specifically, a first contention window length for transmitting an extended channel detection time corresponding to the first transmission object ( For example, q takes 4) less than the second contention window length of the extended channel detection time corresponding to the second transmission object (ratio)
  • q takes a value between 16 and 32) and/or causes the first delay time (eg, 20 us) of the extended channel detection time when the first transmission object is transmitted to detect that the channel is busy is smaller than the transmission.
  • a second delay time for example, 34 us
  • the extension corresponding to the first transmission object is sent.
  • the first contention window length of the channel detection time is adjusted to be smaller than the second contention window length of the extended channel detection time corresponding to the second transmission object, and specifically includes: the first contention window length and the second The length of the contention window is set to a fixed contention window length value, and the first contention window length of the extended channel detection time corresponding to the first transmission object is adjusted to be smaller than the extension corresponding to the second transmission object.
  • the second contention window length of the extended channel detection time is set to be variable a window length value; or setting the first contention window length and the second contention window length to a variable contention window length value, and the transmitting the extended channel detection time corresponding to the first transmission object
  • the first upper limit boundary value and the first lower limit boundary value of the first contention window length are respectively adjusted to be smaller than a second upper limit boundary value of the second contention window length for transmitting the extended channel detection time corresponding to the second transmission object.
  • the extended channel detection time corresponding to the first transmission object may be implemented in multiple manners.
  • the first contention window length is smaller than the second contention window length of the extended channel detection time corresponding to the second transmission object, to ensure the implementability of the solution, specifically including the following: (1) the first contention window length and When the second contention window length is set to a fixed contention window length value, the first contention window length is directly adjusted to be smaller than the second contention window length; (2) the second contention window length is set to a fixed contention window length value to be the second The competition window length is set to a variable contention window length value such that the first contention window length is less than the second contention window length; (3) the first contention window length and the second competition are When the window length is set to a variable contention window length value, the first upper limit boundary value and the first lower limit boundary value (ie, the maximum value and the minimum value) of the first contention window length are respectively smaller than the second upper limit of the second
  • a boundary value and a second lower limit boundary value ie, a maximum value and a minimum value
  • a first increase value of the first contention window length eg, the growth value is less than the first contention window length
  • a second increase value of the second contention window length if the growth value is equal to the length of the second contention window, the growth may be multiplied, so that the length of the first contention window is smaller than the length of the second contention window; thus, the probability of transmitting the occupied channel of the first transmission object is increased, thereby improving the LAA.
  • the upstream throughput of the system if the growth value is equal to the length of the second contention window, the growth may be multiplied, so that the length of the first contention window is smaller than the length of the second contention window; thus, the probability of transmitting the occupied channel of the first transmission object is increased, thereby improving the LAA.
  • the first sending object includes: downlink transmitting PDCCH/EPDCCH signaling including an authorization indication for scheduling an uplink PUSCH or transmitting uplink PUSCH data; and the second sending object includes: transmitting a downlink PDSCH data.
  • the first transmission object preferably includes: PDCCH/EPDCCH signaling including an authorization indication for scheduling an uplink PUSCH or PUSCH data transmitted on an uplink channel when the downlink channel is transmitted, and the second transmission object is preferably included in the
  • the PDSCH data transmitted by the downlink channel that is, the priority ranking of the PDSCH data transmitted on the downlink channel is lower than the former two, so that the PDCCH/EPDCCH signaling for scheduling the uplink PUSCH grant indication and the uplink channel transmission are performed when the downlink channel is transmitted.
  • the PUSCH data has a high probability of occupying the channel, thereby increasing the uplink throughput of the LAA system.
  • the PDCCH/EPDCCH signaling including the scheduling indication of the uplink PUSCH and the priority of the PUSCH data transmitted on the uplink channel do not affect each other when the downlink channel is transmitted, as long as the priority ranking of the two is higher than the downlink.
  • the PDSCH data transmitted by the channel is sufficient.
  • the first sending object includes: transmitting uplink PUSCH data, and the scheduling signaling of the uplink grant indication for transmitting the uplink PUSCH data is sent by using a PDCCH/EPDCCH of an unlicensed band;
  • the second transmission object includes: transmitting uplink PUSCH data, and the scheduling signaling of the uplink grant indication for transmitting the uplink PUSCH data is sent by using a PDCCH/EPDCCH of the licensed frequency band.
  • the first sending object is preferably the uplink PUSCH data, and the scheduling signaling of the uplink grant indication is sent by the PDCCH/EPDCCH of the unlicensed band.
  • the second transmission object is preferably the uplink PUSCH data, and the scheduling signaling of the uplink grant indication is sent by the PDCCH/EPDCCH of the licensed frequency band, so that the scheduling signaling of the uplink grant indication is the PDCCH/EPDCCH in the unlicensed frequency band.
  • a channel occupancy probability adjustment system for a base station, including: a determining module, configured to determine a first sending object and a second sending object to be sent by the base station, where The first sending object has a higher priority than the second sending object; the determining module is configured to determine whether to use the LBT channel detecting mechanism when sending the first sending object; and the control module is configured to determine whether Controlling to directly send the first transmission object, and using an LBT channel detection mechanism when transmitting the second transmission object; and an adjustment module, configured to, when the determination is yes, adjust to send the first transmission object and And the parameter information of the LBT channel detection mechanism corresponding to the second sending object, so that the probability that the first transmitting object occupies the channel is greater than the probability that the second transmitting object occupies the channel.
  • different LBT channel detection mechanisms or parameter information of the LBT channel detection mechanism are set for different transmission objects of the base station, so that the probability of preempting the channel is distinguished according to the priority, that is, the priority of the transmission target with the highest priority is increased.
  • the probability of the channel in particular, the first transmission object ranked first for priority may be directly transmitted without performing LBT channel detection, and the second transmission object with lower priority ranking must perform LBT channel detection before transmission, thus, Obviously, the probability that the first transmitting object occupies the channel can be increased, thereby improving the uplink throughput of the LAA system.
  • the LBT channel detection needs to be performed when both the first sending object and the second sending object are sent, different objects can be sent by adjusting.
  • the parameter information of the corresponding LBT channel detection mechanism is used to improve the probability of occupying the occupied channel of the priority ranking object, thereby improving the uplink throughput of the LAA system.
  • the adjusting module is specifically configured to: adjust, according to the first channel detection time granularity of the LBT channel detection mechanism corresponding to the first sending object, to be smaller than the second sending object a second channel detection time granularity of the corresponding LBT channel detection mechanism, wherein, when the load-based LBT channel detection mechanism is used, the first channel detection time granularity and the second channel detection time granularity include: initial channel detection time Granularity And an extended channel detection time granularity; and/or adjusting a first channel detection threshold of the LBT channel detection mechanism corresponding to the first transmission object to be greater than an LBT channel detection mechanism corresponding to the second transmission object a second channel detection threshold; and/or determining a type of the LBT channel detection mechanism respectively corresponding to the first transmission object and the second transmission object, to transmit the first transmission object and the The parameter information of the LBT channel detection mechanism corresponding to the second transmission object respectively.
  • the parameter information of the LBT channel detection mechanism specifically includes: (1) detecting the time granularity by adjusting the channel, that is, making the first channel detection time granularity of the LBT channel detection mechanism corresponding to the first transmission object (for example, 20us)
  • the second channel detection time granularity (for example, 34 us) of the LBT channel detection mechanism corresponding to the second transmission object is transmitted, so that the probability of transmitting the occupied channel of the first transmission object is improved by shortening the channel detection time granularity, and priority is given.
  • the occupied channel is used for data transmission, wherein when the load is based on the LBT channel detection mechanism, the channel detection time granularity includes at least an initial channel detection time granularity (initial CCA slot) and an extended channel detection time granularity (ECCAslot); (2)
  • the channel detection threshold that is, to enable transmission of the LBT channel corresponding to the first transmission object
  • the first channel detection threshold of the mechanism is greater than the second channel detection threshold of the LBT channel detection mechanism corresponding to the second transmission object. Therefore, by increasing the channel detection threshold, channel interference compatibility can be improved, thereby improving transmission of the first transmission.
  • the adjusting module when determining to send the LBT channel detection mechanism based on the frame structure corresponding to the first sending object and the second sending object, is specifically configured to: send the a repetition period of the first channel detection time corresponding to the first transmission object is adjusted to be smaller than a repetition period of the second channel detection time corresponding to the second transmission object; and determining to send the first transmission object and the
  • the adjusting module is specifically configured to: send the first The first contention window length of the extended channel detection time corresponding to the transmission object is adjusted to be smaller than the second contention window length of the extended channel detection time corresponding to the second transmission object; and/or the first The first delay time corresponding to the extended channel detection time when the channel is busy is detected is adjusted to be smaller than the second delay of the extended channel detection time when the second channel is detected to be busy when the channel is busy. time.
  • the frame structure (FBE)-based LBT channel detection mechanism corresponding to the first transmission object and the second transmission object when it is determined that the frame structure (FBE)-based LBT channel detection mechanism corresponding to the first transmission object and the second transmission object is sent, by repeating the repetition period of the channel detection time, specifically, sending the first
  • the repetition period of the first channel detection time corresponding to the transmission object is smaller than the repetition period of the second channel detection time corresponding to the second transmission object, that is, the number of times of channel detection for transmitting the first transmission object is increased in the same time.
  • a contention window length and/or a defer period of an extended channel detection time when the channel is detected to be busy specifically, a first contention window length for transmitting an extended channel detection time corresponding to the first transmission object ( For example, q takes 4) less than the second contention window length of the extended channel detection time corresponding to the second transmission object (ratio)
  • q takes a value between 16 and 32) and/or causes a first delay time (eg, 20 us) of the extended channel detection time when the first transmission object is transmitted to detect that the channel is busy is smaller than the second transmission.
  • the second delay time (for example, 34 us) of the extended channel detection time when the channel is busy is detected by the object, so as to increase the probability of transmitting the occupied channel of the first transmission object, thereby improving the uplink throughput of
  • the adjustment module when determining that the first transmission object and the second transmission object correspond to the load-based LBT channel detection mechanism, is further configured to: The first contention window length and the second contention window length are set to a fixed contention window length value, and the first contention window length for transmitting the extended channel detection time corresponding to the first transmission object is adjusted to be smaller than Transmitting the second contention window length of the extended channel detection time corresponding to the second transmission object; or setting the first contention window length of the extended channel detection time corresponding to the first transmission object a fixed contention window length value, and an extended channel detection corresponding to the second transmission object to be transmitted
  • the second contention window length of time is set to a variable contention window length value; or the first contention window length and the second contention window length are set to a variable contention window length value, and the first The first upper limit boundary value and the first lower limit boundary value of the first contention window length of the extended channel detection time corresponding to a transmission object are respectively adjusted to be smaller than the extended channel detection time corresponding to the second transmission object.
  • the extended channel detection time corresponding to the first transmission object may be implemented in multiple manners.
  • the first contention window length is smaller than the second contention window length of the extended channel detection time corresponding to the second transmission object, to ensure the implementability of the solution, specifically including the following: (1) the first contention window length and When the second contention window length is set to a fixed contention window length value, the first contention window length is directly adjusted to be smaller than the second contention window length; (2) the second contention window length is set to a fixed contention window length value to be the second The contention window length is set to a variable contention window length value such that the first contention window length is less than the second contention window length; (3) the first contention window length and the second contention window length are set to variable contention window length values By dividing the first upper limit boundary value and the first lower limit boundary value (ie, the maximum value and the minimum value) of the first contention window length a second upper limit boundary value and a second lower limit boundary
  • the first sending object includes: transmitting, by the downlink, PDCCH/EPDCCH signaling that includes an authorization indication for scheduling an uplink PUSCH, or transmitting uplink PUSCH data; and the second sending object includes: transmitting the downlink PDSCH data.
  • the first transmission object preferably includes: PDCCH/EPDCCH signaling including an authorization indication for scheduling an uplink PUSCH when transmitting the downlink channel or transmitting on an uplink channel PUSCH data
  • the second transmission object preferably includes PDSCH data transmitted on the downlink channel, that is, the priority ranking of the PDSCH data transmitted on the downlink channel is lower than the former two, so that the authorization for scheduling the uplink PUSCH is included when the downlink channel is transmitted.
  • the probability of occupying the channel of the indicated PDCCH/EPDCCH signaling and the PUSCH data transmitted on the uplink channel is large, thereby improving the uplink throughput of the LAA system.
  • the PDCCH/EPDCCH signaling including the scheduling indication of the uplink PUSCH and the priority of the PUSCH data transmitted on the uplink channel do not affect each other when the downlink channel is transmitted, as long as the priority ranking of the two is higher than the downlink.
  • the PDSCH data transmitted by the channel is sufficient.
  • the first sending object includes: transmitting uplink PUSCH data, and the scheduling signaling of the uplink grant indication for transmitting the uplink PUSCH data is sent by using a PDCCH/EPDCCH of an unlicensed band;
  • the second transmission object includes: transmitting uplink PUSCH data, and the scheduling signaling of the uplink grant indication for transmitting the uplink PUSCH data is sent by using a PDCCH/EPDCCH of the licensed frequency band.
  • the first transmitting object is preferably the uplink PUSCH data
  • the scheduling signaling of the uplink grant indication is sent by the PDCCH/EPDCCH of the unlicensed band
  • the second sending object is preferably the uplink PUSCH.
  • the scheduling signaling of the uplink grant indication is sent by the PDCCH/EPDCCH of the licensed frequency band to improve the scheduling signaling of the uplink grant indication, and the uplink signaling is occupied when the uplink PUSCH data is sent on the PDCCH/EPDCCH of the unlicensed frequency band. The probability, and thus the upstream throughput of the LAA system in the unlicensed band.
  • the third aspect of the present invention provides a base station, comprising: the channel occupancy probability adjustment system according to any one of the preceding aspects, wherein the base station has the The same technical effects of the channel occupancy probability adjustment system will not be described here.
  • the probability of occupying the channel of the transmission target with the highest priority ranking can be effectively improved, thereby improving the uplink throughput of the LAA system.
  • Figure 1 shows a schematic diagram of two modes of operation of an unlicensed spectrum
  • FIG. 2 is a schematic diagram showing an interference avoidance rule of a Wi-Fi system
  • FIG. 3 is a schematic structural diagram of a FBE-based frame structure in the related art
  • FIG. 4 is a schematic structural diagram of an LBE-based frame structure in the related art
  • FIG. 5 is a schematic flowchart diagram of a method for adjusting a channel occupancy probability according to an embodiment of the present invention
  • FIG. 6 shows a block diagram of an adjustment system for channel occupancy probability according to an embodiment of the present invention
  • Figure 7 shows a block diagram of a base station in accordance with one embodiment of the present invention.
  • FIG. 5 is a flow chart showing a method for adjusting a channel occupancy probability according to an embodiment of the present invention.
  • a method for adjusting a channel occupancy probability is used for a base station, including: Step 502, determining a first sending object and a second sending object to be sent by the base station, where The first sending object has a higher priority than the second sending object; in step 504, it is determined whether the LBT channel detecting mechanism is used when the first sending object is sent, and if the determination is no, step 506 is performed. Otherwise, when the determination is yes, step 508 is performed; in step 506, the first sending object is directly sent, and the LBT channel detecting mechanism is used when the second sending object is sent; in step 508, the sending station is adjusted. And the parameter information of the LBT channel detection mechanism corresponding to the first sending object and the second sending object respectively, so that the probability that the first transmitting object occupies the channel is greater than the probability that the second transmitting object occupies the channel.
  • different LBT channel detections are set for different transmission objects of the base station.
  • the parameter information of the mechanism or the LBT channel detection mechanism in order to distinguish the probability of preempting the channel according to the priority, that is, increasing the probability of occupying the channel of the transmission target with the highest priority, specifically, the first transmission object with the highest priority ranking
  • the LBT channel detection can be directly sent without the LBT channel detection, and the LBT channel detection must be performed before the second transmission object with the lower priority ranking. Therefore, the probability that the first transmission object occupies the channel can be improved, thereby improving the uplink of the LAA system.
  • the parameter information of the LBT channel detection mechanism corresponding to the different objects can be adjusted to achieve the priority ranking.
  • the step 508 specifically includes: adjusting, according to the LBT channel detection mechanism corresponding to the first sending object, a first channel detection time granularity to be smaller than that of sending the second sending object.
  • the second channel detection time granularity of the LBT channel detection mechanism wherein, when the load-based LBT channel detection mechanism is used, the first channel detection time granularity and the second channel detection time granularity include: initial channel detection time granularity And an extended channel detection time granularity; and/or adjusting a first channel detection threshold of the LBT channel detection mechanism corresponding to the first transmission object to be greater than an LBT channel detection mechanism corresponding to the second transmission object a second channel detection threshold; and/or determining a type of the LBT channel detection mechanism respectively corresponding to the first transmission object and the second transmission object, to transmit the first transmission object and the The parameter information of the LBT channel detection mechanism corresponding to the second transmission object respectively.
  • the parameter information of the LBT channel detection mechanism specifically includes: (1) detecting the time granularity by adjusting the channel, that is, making the first channel detection time granularity of the LBT channel detection mechanism corresponding to the first transmission object (for example, 20us)
  • the second channel detection time granularity (for example, 34 us) of the LBT channel detection mechanism corresponding to the second transmission object is transmitted, so that the probability of transmitting the occupied channel of the first transmission object is improved by shortening the channel detection time granularity, and priority is given.
  • the occupied channel is used for data transmission, wherein when the load is based on the LBT channel detection mechanism, the channel detection time granularity includes at least the initial letter.
  • the initial CCA slot and the extended channel detection time granularity (ECCA slot).
  • the initial CCA detection time granularity is 34 us
  • the extended CCA detection time granularity is 20 us.
  • the initial CCA detection time granularity is 20 us
  • the extended CCA detection time granularity is 9 us
  • (2) by adjusting the channel detection threshold That is, the first channel detection threshold for transmitting the LBT channel detection mechanism corresponding to the first transmission object is greater than the second channel detection threshold for transmitting the LBT channel detection mechanism corresponding to the second transmission object, and thus, by increasing the channel detection threshold
  • the compatibility of the channel interference can be improved, that is, as long as the channel interference is not large, the first transmission object can be transmitted, thereby increasing the probability of transmitting the occupied channel of the first transmission object; and (3) corresponding to the transmission object according to the transmission.
  • the type of LBT channel detection mechanism further refines the parameter information to improve the priority row The probability of occupying the channel of the transmitting object before the top, thereby increasing the uplink throughput of the LAA system.
  • the determining is performed to send a type of an LBT channel detection mechanism respectively corresponding to the first sending object and the second sending object, to send the first sending object according to the type adjustment
  • the parameter information of the LBT channel detection mechanism corresponding to the second sending object specifically includes: when determining to send the LBT channel detecting mechanism based on the frame structure corresponding to the first sending object and the second sending object And adjusting a repetition period of the first channel detection time corresponding to the first transmission object to be smaller than a repetition period of sending the second channel detection time corresponding to the second transmission object; and determining to send the first And adjusting the parameter information of the LBT channel detection mechanism corresponding to the first sending object and the second sending object respectively, where the sending object and the second sending object are the load-based LBT channel detecting mechanism, including : adjusting a first contention window length of the extended channel detection time corresponding to the first transmission object to be smaller than sending a second contention window length of the extended channel detection time corresponding to the second transmission object; and/or a first delay
  • the repetition period of the channel detection time is adjusted, and specifically, the repetition period of the first channel detection time corresponding to the first transmission object is smaller than that of the second transmission object.
  • the repetition period of the second channel detection time that is, the number of times of channel detection for transmitting the first transmission object is increased in the same time, thereby increasing the probability of transmitting the occupied channel of the first transmission object; and determining the first transmission object and
  • the length of the contention window of the extended channel detection time (ECCA) is adjusted and/or the delay time of the extended channel detection time when the channel is busy is detected.
  • the first contention window length (for example, q is 4) for transmitting the extended channel detection time corresponding to the first transmission object is smaller than the extended channel detection time corresponding to the second transmission object.
  • the second contention window length (eg, q takes a value between 16 and 32) and/or causes the corresponding first transmission object to be sent
  • the first delay time (for example, 20 us) of the extended channel detection time when the track is busy is smaller than the second delay time (such as 34 us) of the extended channel detection time when the second transmission object is detected, when the channel is busy is detected, to The probability of transmitting the occupied channel of the first transmission object is increased, thereby improving the uplink throughput of the LAA system.
  • the extension corresponding to the first transmission object is sent.
  • the first contention window length of the channel detection time is adjusted to be smaller than the second contention window length of the extended channel detection time corresponding to the second transmission object, and specifically includes: the first contention window length and the second The length of the contention window is set to a fixed contention window length value, and the first contention window length of the extended channel detection time corresponding to the first transmission object is adjusted to be smaller than the extension corresponding to the second transmission object.
  • the second contention window length of the extended channel detection time is set to be variable a window length value; or setting the first contention window length and the second contention window length to a variable contention window length value, and the transmitting the extended channel detection time corresponding to the first transmission object
  • the first upper limit boundary value and the first lower limit boundary value of the first contention window length are respectively adjusted to be smaller than the second send And sending a second upper limit boundary value and a second lower limit boundary value of the second contention window length of the extended channel detection time corresponding to the object, and adjusting the first increase value of the first contention window length to be smaller than the The second growth value of the second contention window length.
  • the extended channel detection time corresponding to the first transmission object may be implemented in multiple manners.
  • the first contention window length is smaller than the second contention window length of the extended channel detection time corresponding to the second transmission object, to ensure the implementability of the solution, specifically including the following: (1) the first contention window length and When the second contention window length is set to a fixed contention window length value, the first contention window length is directly adjusted to be smaller than the second contention window length, that is, when the LBT channel detection mechanism is based on the LBE, the random number N is occupied by a smaller value.
  • the probability of the channel is high, for example, the value of the first contention window length for transmitting the extended channel detection time corresponding to the first transmission object is 4, and the second competition for transmitting the extended channel detection time corresponding to the second transmission object is transmitted.
  • the value of the window length is 16 to 32, and then the random number N in the LBT channel detection mechanism corresponding to the first transmission object is sent from 1 If q is taken, the smaller value is taken, which means that the first transmission object needs to be sent when the channel is idle when less CCA detection time is detected; (2) by setting the first contention window length to the fixed contention window.
  • a length value and a second contention window length is set to a variable contention window length value such that the first contention window length is less than the second contention window length; (3) the first contention window length and the second contention window length are set to When the contention window length value is variable, the first upper limit boundary value and the first lower limit boundary value (ie, the maximum value and the minimum value) of the first contention window length are respectively smaller than the second upper limit boundary value of the second contention window length and the first a second lower bound value (ie, a maximum value and a minimum value) and causing a first growth value of the first contention window length (eg, the growth value is less than the first contention window length) to be less than a second growth value of the second contention window length (eg, a growth value) Equal to the length of the second contention window, which can be multiplied), so that the first contention window length is smaller than the second contention window length; thus, the probability of transmitting the occupied channel of the first transmission object is improved. , thereby increasing the upstream throughput of the LAA system.
  • the first sending object includes: downlink transmitting PDCCH/EPDCCH signaling including an authorization indication for scheduling an uplink PUSCH or transmitting uplink PUSCH data; and the second sending object includes: transmitting a downlink PDSCH data.
  • the first transmission object preferably includes: PDCCH/EPDCCH signaling including an authorization indication for scheduling an uplink PUSCH or PUSCH data transmitted on an uplink channel when the downlink channel is transmitted, and the second transmission object is preferably included in the
  • the PDSCH data transmitted by the downlink channel that is, the priority ranking of the PDSCH data transmitted on the downlink channel is lower than the former two, so that the PDCCH/EPDCCH signaling for scheduling the uplink PUSCH grant indication and the uplink channel transmission are performed when the downlink channel is transmitted.
  • the PUSCH data has a high probability of occupying the channel, thereby increasing the uplink throughput of the LAA system.
  • the PDCCH/EPDCCH signaling including the scheduling indication of the uplink PUSCH and the priority of the PUSCH data transmitted on the uplink channel do not affect each other when the downlink channel is transmitted, as long as the priority ranking of the two is higher than the downlink.
  • the PDSCH data transmitted by the channel is sufficient.
  • the first sending object includes: transmitting uplink PUSCH data, and the scheduling signaling of the uplink grant indication for transmitting the uplink PUSCH data is sent by using a PDCCH/EPDCCH of an unlicensed band;
  • the second transmission object includes: transmitting uplink PUSCH data, and the scheduling signaling of the uplink grant indication for transmitting the uplink PUSCH data is sent by using a PDCCH/EPDCCH of the licensed frequency band.
  • the first transmitting object is preferably the uplink PUSCH data
  • the scheduling signaling of the uplink grant indication is sent by the PDCCH/EPDCCH of the unlicensed band
  • the second sending object is preferably the uplink PUSCH.
  • the scheduling signaling of the uplink grant indication is sent by the PDCCH/EPDCCH of the licensed frequency band to improve the scheduling signaling of the uplink grant indication, and the uplink signaling is occupied when the uplink PUSCH data is sent on the PDCCH/EPDCCH of the unlicensed frequency band. Probability, which in turn increases the upstream throughput of the LAA system in unlicensed bands.
  • Figure 6 shows a block diagram of an adjustment system for channel occupancy probability in accordance with one embodiment of the present invention.
  • the system for adjusting the channel occupancy probability is used for a base station, and includes: a determining module 602, configured to determine a first sending object and a second sending object to be sent by the base station.
  • the first sending object has a higher priority than the second sending object;
  • the determining module 604 is configured to determine that the first sending object is sent Whether the LBT channel detection mechanism is used;
  • the control module 606 is configured to: when the determination is no, control to directly send the first transmission object, and use the LBT channel detection mechanism when transmitting the second transmission object; and the adjustment module 608 And determining, when the determination is yes, parameter information of the LBT channel detection mechanism corresponding to the first sending object and the second sending object, so that the probability of transmitting the first transmitting object occupying the channel is greater than sending The probability that the second transmitting object occupies a channel.
  • different LBT channel detection mechanisms or parameter information of the LBT channel detection mechanism are set for different transmission objects of the base station, so that the probability of preempting the channel is distinguished according to the priority, that is, the priority of the transmission target with the highest priority is increased.
  • the probability of the channel in particular, the first transmission object ranked first for priority may be directly transmitted without performing LBT channel detection, and the second transmission object with lower priority ranking must perform LBT channel detection before transmission, thus, Obviously, the probability that the first transmitting object occupies the channel can be increased, thereby improving the uplink throughput of the LAA system.
  • the LBT channel detection needs to be performed when both the first sending object and the second sending object are sent, different objects can be sent by adjusting.
  • the parameter information of the corresponding LBT channel detection mechanism is used to improve the probability of occupying the occupied channel of the priority ranking object, thereby improving the uplink throughput of the LAA system.
  • the adjustment module 608 is specifically configured to: adjust a first channel detection time granularity of the LBT channel detection mechanism corresponding to the first transmission object to be smaller than the second transmission object.
  • the second channel detection time granularity of the corresponding LBT channel detection mechanism wherein, when the load-based LBT channel detection mechanism is used, the first channel detection time granularity and the second channel detection time granularity include: initial channel detection a time granularity and an extended channel detection time granularity; and/or adjusting a first channel detection threshold of the LBT channel detection mechanism corresponding to the first transmission object to be greater than an LBT channel detection corresponding to the second transmission object a second channel detection threshold of the mechanism; and/or determining a type of the LBT channel detection mechanism respectively corresponding to the first transmission object and the second transmission object, to send the first transmission object according to the type adjustment
  • the first sending pair may be sent by one or more of the following manners.
  • the parameter information of the LBT channel detection mechanism corresponding to the second transmission object specifically includes: (1) detecting the time granularity by adjusting the channel, that is, transmitting the LBT channel detection mechanism corresponding to the first transmission object.
  • the channel detection time granularity (for example, 20 us) is smaller than the second channel detection time granularity (for example, 34 us) of the LBT channel detection mechanism corresponding to the second transmission object, and thus, the transmission first is improved by shortening the channel detection time granularity.
  • the probability of transmitting the occupied channel of the object preferentially occupies the channel for data transmission.
  • the channel detection time granularity includes at least an initial channel detection time granularity (initial CCA slot) and extended channel detection.
  • the time granularity (ECCA slot) for example, the LBT channel detection mechanism for transmitting the downlink PDSCH data, the initial CCA detection time granularity is 34 us, the extended CCA detection time granularity is 20 us, and the downlink PDCCH/EPDCCH transmits the UL grant (or the uplink is sent)
  • the initial CCA detection time granularity is 20us.
  • the extended CCA detection time granularity is 9us; (2) by adjusting the channel detection threshold, that is, the first channel detection threshold of the LBT channel detection mechanism corresponding to the first transmission object is greater than the LBT corresponding to the second transmission object.
  • the second channel detection threshold of the channel detection mechanism so that the channel interference threshold can be increased by increasing the channel detection threshold, that is, as long as the channel interference is not large, the first transmission object can be transmitted, thereby improving the transmission of the first transmission object.
  • (3) further refine the adjustment parameter information according to the type of the LBT channel detection mechanism corresponding to the transmission of different transmission objects, so as to improve the probability of occupying the channel of the transmission target with the highest priority, thereby improving Upstream throughput of the LAA system.
  • the determining module 608 is specifically configured to: send the sending station, when it is determined that the frame-based LBT channel detecting mechanism corresponding to the first sending object and the second sending object is sent a repetition period of the first channel detection time corresponding to the first transmission object is adjusted to be smaller than a repetition period of the second channel detection time corresponding to the second transmission object; and determining to send the first transmission object and the
  • the adjusting module 608 is specifically configured to: adjust a first contention window length of the extended channel detection time corresponding to the first sending object to be adjusted to be the load-based LBT channel detecting mechanism.
  • the first delay time of the extended channel detection time is adjusted to be less than a second delay time corresponding to the extended channel detection time when the second transmission object detects that the channel is busy.
  • the frame structure (FBE)-based LBT channel detection mechanism corresponding to the first transmission object and the second transmission object when it is determined that the frame structure (FBE)-based LBT channel detection mechanism corresponding to the first transmission object and the second transmission object is sent, by repeating the repetition period of the channel detection time, specifically, sending the first
  • the repetition period of the first channel detection time corresponding to the transmission object is smaller than the repetition period of the second channel detection time corresponding to the second transmission object, that is, the number of times of channel detection for transmitting the first transmission object is increased in the same time.
  • a contention window length and/or a defer period of an extended channel detection time when the channel is detected to be busy specifically, a first contention window length for transmitting an extended channel detection time corresponding to the first transmission object ( For example, q takes 4) less than the second contention window length of the extended channel detection time corresponding to the second transmission object (ratio)
  • q takes a value between 16 and 32) and/or causes a first delay time (eg, 20 us) of the extended channel detection time when the first transmission object is transmitted to detect that the channel is busy is smaller than the second transmission.
  • the second delay time (for example, 34 us) of the extended channel detection time when the channel is busy is detected by the object, so as to increase the probability of transmitting the occupied channel of the first transmission object, thereby improving the uplink throughput of
  • the adjustment module specifically 608 is configured to:
  • the first contention window length and the second contention window length are set to a fixed contention window length value, and the first contention window length for transmitting the extended channel detection time corresponding to the first transmission object is adjusted to be smaller than Transmitting the second contention window length of the extended channel detection time corresponding to the second transmission object; or setting the first contention window length of the extended channel detection time corresponding to the first transmission object Setting the contention window length value, and setting the second contention window length of the extended channel detection time corresponding to the second transmission object to a variable contention window length value; or setting the first contention window length And the second contention window length is set to a variable contention window length value, and the extension corresponding to the first transmission object is to be sent Said first channel detection time competing
  • the first upper limit boundary value and the first lower limit boundary value of the contention window length are respectively adjusted to be smaller than a second upper limit boundary value and a
  • the extended channel detection time corresponding to the first transmission object may be implemented in multiple manners.
  • the first contention window length is smaller than the second contention window length of the extended channel detection time corresponding to the second transmission object, to ensure the implementability of the solution, specifically including the following: (1) the first contention window length and When the second contention window length is set to a fixed contention window length value, the first contention window length is directly adjusted to be smaller than the second contention window length, that is, when the LBT channel detection mechanism is based on the LBE, the random number N is occupied by a smaller value.
  • the probability of the channel is high, for example, the value of the first contention window length for transmitting the extended channel detection time corresponding to the first transmission object is 4, and the second competition for transmitting the extended channel detection time corresponding to the second transmission object is transmitted.
  • the value of the window length is 16 to 32, and then the random number N in the LBT channel detection mechanism corresponding to the first transmission object is sent from 1 If q is taken, the smaller value is taken, which means that the first transmission object needs to be sent when the channel is idle when less CCA detection time is detected; (2) by setting the first contention window length to the fixed contention window.
  • a length value and a second contention window length is set to a variable contention window length value such that the first contention window length is less than the second contention window length; (3) the first contention window length and the second contention window length are set to When the contention window length value is variable, the first upper limit boundary value and the first lower limit boundary value (ie, the maximum value and the minimum value) of the first contention window length are respectively smaller than the second upper limit boundary value of the second contention window length and the first a second lower bound value (ie, a maximum value and a minimum value) and causing a first growth value of the first contention window length (eg, the growth value is less than the first contention window length) to be less than a second growth value of the second contention window length (eg, a growth value) Equal to the length of the second contention window, which may be multiplied), so that the first contention window length is smaller than the second contention window length; thus, the probability of transmitting the occupied channel of the first transmission object is improved, In turn, the uplink throughput of the LAA system is increased.
  • the first sending object includes: transmitting, by the downlink, PDCCH/EPDCCH signaling that includes an authorization indication for scheduling an uplink PUSCH, or sending an uplink PUSCH data; the second transmission object includes: transmitting downlink PDSCH data.
  • the first transmission object preferably includes: PDCCH/EPDCCH signaling including an authorization indication for scheduling an uplink PUSCH or PUSCH data transmitted on an uplink channel when the downlink channel is transmitted, and the second transmission object is preferably included in the
  • the PDSCH data transmitted by the downlink channel that is, the priority ranking of the PDSCH data transmitted on the downlink channel is lower than the former two, so that the PDCCH/EPDCCH signaling for scheduling the uplink PUSCH grant indication and the uplink channel transmission are performed when the downlink channel is transmitted.
  • the PUSCH data has a high probability of occupying the channel, thereby increasing the uplink throughput of the LAA system.
  • the PDCCH/EPDCCH signaling including the scheduling indication of the uplink PUSCH and the priority of the PUSCH data transmitted on the uplink channel do not affect each other when the downlink channel is transmitted, as long as the priority ranking of the two is higher than the downlink.
  • the PDSCH data transmitted by the channel is sufficient.
  • the first sending object includes: transmitting uplink PUSCH data, and the scheduling signaling of the uplink grant indication for transmitting the uplink PUSCH data is sent by using a PDCCH/EPDCCH of an unlicensed band;
  • the second transmission object includes: transmitting uplink PUSCH data, and the scheduling signaling of the uplink grant indication for transmitting the uplink PUSCH data is sent by using a PDCCH/EPDCCH of the licensed frequency band.
  • the first transmitting object is preferably the uplink PUSCH data
  • the scheduling signaling of the uplink grant indication is sent by the PDCCH/EPDCCH of the unlicensed band
  • the second sending object is preferably the uplink PUSCH.
  • the scheduling signaling of the uplink grant indication is sent by the PDCCH/EPDCCH of the licensed frequency band to improve the scheduling signaling of the uplink grant indication, and the uplink signaling is occupied when the uplink PUSCH data is sent on the PDCCH/EPDCCH of the unlicensed frequency band. Probability, which in turn increases the upstream throughput of the LAA system in unlicensed bands.
  • Figure 7 shows a block diagram of a base station in accordance with one embodiment of the present invention.
  • a base station 700 includes: the channel occupancy probability adjustment system 600 according to any one of the foregoing second aspects, and therefore, the base station 700 has the second aspect
  • the same technical effects of the channel occupancy probability adjustment system 600 described in any one of the above are not described herein.

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Abstract

本发明提出了一种信道占用概率的调整方法、一种信道占用概率的调整系统和一种基站，所述信道占用概率的调整方法包括：确定基站待发送的第一发送对象和第二发送对象，其中，第一发送对象的优先级高于第二发送对象的优先级；判断在发送第一发送对象时是否使用LBT信道检测机制；在判定为否时，直接发送第一发送对象，且在发送第二发送对象时使用LBT信道检测机制；在判定为是时，调整发送第一发送对象和第二发送对象分别对应的LBT信道检测机制的参数信息，以使发送第一发送对象占用信道的概率大于发送第二发送对象占用信道的概率。该技术方案，可以有效地提高优先级排名靠前的发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。

Description

信道占用概率的调整方法、调整系统和基站 技术领域
本发明涉及通信技术领域，具体而言，涉及一种信道占用概率的调整方法、一种信道占用概率的调整系统和一种基站。
背景技术
随着通信业务量的急剧增加，3GPP(The 3rd Generation Partnership Project，第三代移动通信伙伴组织)的授权频谱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率，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Wi-Fi、蓝牙、雷达、医疗等系统在使用。
通常情况下，为已授权频段设计的接入技术，如LTE(Long Term Evolution，长期演进)不适合在非授权频段上使用，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(Carrier Aggregation，CA)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模式，既包含下行子帧、上行子帧。补充下行这种情况只能是借助载波聚合技术使用。而TDD模式除了可以借助载波聚合技术使用外，还可以借助DC(Dual Connectivity，双连通)使用，也可以独立使用。如图1所示。
相比于Wi-Fi系统，工作在非授权频段的LTE系统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非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Wi-Fi，具有较弱的抗干 扰能力。为了避免干扰，Wi-Fi系统设计了很多干扰避免规则，如CSMA/CD(Carrier Sense Multiple Access/Collision Detection，载波监听多路访问/冲突检测方法)，这种方法的基本原理是Wi-Fi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其他AP或者其他终端在发送/接收信令或数据，若有，则继续监听，直到监听到没有为止；若没有，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。该过程如图2所示。
但是，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其他基站或其他用户在传输数据。如果LTE在非授权频段上使用时也不考虑周围是否有其他设备在使用非授权频段，那么将对Wi-Fi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Wi-Fi设备在LTE有业务传输时就不能传输，只能等到LTE业务传输完成，才能检测到信道空闲状态以进行数据传输。
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(LTE assisted access，LTE辅助的接入技术)能够在公平友好的基础上和现有的接入技术(比如Wi-Fi)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Wi-Fi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。
基于上述问题，目前，提出了一种基于帧结构的(FBE，Frame based equipment)的LBT机制(如图3所示)，左斜线是CCA(Clear Channel Assessment，空闲信道评估)的信道检测时间，CCA检测时间周期性重复出现，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(空闲)时间，在idle时间，发送点不发送信号和数据，以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。当然，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。
目前，还提出了一种基于负载的(LBE，Load based equipment)的LBT机制，如下图4所示：基于LBE的LBT机制是无周期的，只要业务到达，则触发CCA检测，如果CCA检测空闲，则马上发送信令或数据；若检测到信道忙，则取一个随机数N，N的取值范围为1到q(即竞争窗口长度)，q的取值范围是4到32。图4示出了q＝16的情况，此时，当检测到信道空闲时，信道最大占用时间为(13/32)x q＝6.5ms。在6.5ms之后，采取extended CCA(延长的信道检测时间)机制，即也是随机取值N，N的范围为1到16，若取值为8，则表示在接下来的连续的CCA检测时间中，每个CCA检测时间都要检测信道，若检测到信道空闲，则N-1，若检测到信道忙，则N不变，当N为0时，发送信令或数据。
另外，为了更进一步与Wi-Fi保持公平性，LBE采取不同的initialCCA(初始信道检测时间)和extended CCA(ECCA，延长的信道检测时间)的值，比如第一次CCA检测，叫initial CCA，这个时间粒度比较大，比如34us；当检测到信道忙或者信道占用时间截止之后的ECCA的时间粒度比较小，比如9us。另外，在信道检测中，若检测到信道忙，则要增加一个defer period(延迟时间)，该defer period的值与initial CCA的值相当，也就是说必须再次长时间的检测到信道空闲，才能继续N-1。
而对于LAA中的上行PUSCH(Physical Uplink Shared Channel，物理上行共享信道)的发送，有两种情况：第一种情况是，调度LAA的PUSCH资源的UL grant(上行授权指示)是由非授权频谱上的PDCCH(Physical Downlink Control Channel，物理下行控制信道)或EPDCCH(Enhanced Physical Downlink Control Channel，增强的物理下行控制信道)发送，在这种情况下，eNB(基站)在发送UL grant时，要先做下行的LBT检测，即eNB先做下行LBT检测，再发送UL grant；UE(终端)在收到UL grant之后，再进行上行的LBT检测，再发送PUSCH，使得UL PUSCH更难发送；第二种情况是，调度LAA的PUSCH资源的UL grant是由授权频谱上的PDCCH或EPDCCH发送，这种情况下，eNB在 发送UL grant时，因为是在授权频谱上发送，所以不用进行下行的LBT检测，在被调度的UE在收到UL grant之后，进行上行的LBT检测，然后再发送PUSCH，使得PUSCH的容易发送。
因此，如何提高LAA系统的上行吞吐量性能成为亟待解决的问题。
发明内容
本发明正是基于上述问题，提出了一种新的技术方案，根据基站发送对象的不同，设置不同的LBT信道检测机制或参数，使优先级排名靠前的发送对象可以优先占用信道，即可以有效地提高优先级排名靠前的发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量性能。
有鉴于此，本发明的第一方面，提出了一种信道占用概率的调整方法，用于基站，包括：确定所述基站待发送的第一发送对象和第二发送对象，其中，所述第一发送对象的优先级高于所述第二发送对象的优先级；判断在发送所述第一发送对象时是否使用LBT信道检测机制；在判定为否时，直接发送所述第一发送对象，且在发送所述第二发送对象时使用LBT信道检测机制；在判定为是时，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的参数信息，以使发送所述第一发送对象占用信道的概率大于发送所述第二发送对象占用信道的概率。
在该技术方案中，对基站的不同发送对象设置不同的LBT信道检测机制或LBT信道检测机制的参数信息，以根据优先级区别抢占信道的概率，即提高优先级排名靠前的发送对象的占用信道的概率，具体地，对于优先级排名靠前的第一发送对象可以无需进行LBT信道检测直接发送，而对于优先级排名靠后的第二发送对象在发送之前必须进行LBT信道检测，如此，显然可以提高第一发送对象占用信道的概率，进而提高LAA系统的上行吞吐量；另外，如果在发送第一发送对象和第二发送对象均需要进行LBT信道检测，则可以通过调整发送不同的对象所对应的LBT信道检测机制的参数信息，以达到提高优先级排名靠前的发送对象的占用信道的概率的目的，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述在判定为是时，调整发送所述第一 发送对象和所述第二发送对象分别对应的LBT信道检测机制的参数信息，以使发送所述第一发送对象占用信道的概率大于发送所述第二发送对象占用信道的概率，具体包括：将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度调整为小于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度，其中，当为基于负载的LBT信道检测机制时，所述第一信道检测时间粒度和所述第二信道检测时间粒度包括：初始信道检测时间粒度和延长的信道检测时间粒度；和/或将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测门限调整为大于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测门限；和/或确定发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的类型，以根据所述类型调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息。
在该技术方案中，当发送第一发送对象和第二发送对象均需要进行LBT信道检测时，可以通过以下方式中的一种或多种调整发送第一发送对象和第二发送对象所对应的LBT信道检测机制的参数信息，具体地包括：(1)通过调整信道检测时间粒度，也就是说，使发送第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度(比如，20us)小于发送第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度(比如，34us)，如此，通过缩短信道检测时间粒度的方式提高发送第一发送对象的占用信道的概率，优先地占用信道进行数据传输，其中，当为基于负载的LBT信道检测机制时，信道检测时间粒度至少包括初始信道检测时间粒度(initial CCA slot)和延长的信道检测时间粒度(ECCA slot)；(2)通过调整信道检测门限，也就是说，使发送第一发送对象所对应的LBT信道检测机制的第一信道检测门限大于发送第二发送对象所对应的LBT信道检测机制的第二信道检测门限，如此，通过增大信道检测门限可以提高对信道干扰的兼容性，进而提高发送第一发送对象的占用信道的概率；(3)通过根据发送不同的发送对象所对应的LBT信道检测机制的类型进一步细化调整参数信息，以提高优先级排名靠前的发送对象 的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述确定发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的类型，以根据所述类型调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息，具体包括：在确定发送所述第一发送对象和所述第二发送对象对应的为基于帧结构的LBT信道检测机制时，将发送所述第一发送对象所对应的第一信道检测时间的重复周期调整为小于发送所述第二发送对象所对应的第二信道检测时间的重复周期；以及在确定发送所述第一发送对象和所述第二发送对象对应的为基于负载的LBT信道检测机制时，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息，包括：将发送所述第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度；和/或将发送所述第一发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第一延迟时间调整为小于所述第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间。
在该技术方案中，当确定发送第一发送对象和第二发送对象对应的为基于帧结构(FBE)的LBT信道检测机制时，通过调整信道检测时间的重复周期，具体地，使发送第一发送对象所对应的第一信道检测时间的重复周期小于发送第二发送对象所对应的第二信道检测时间的重复周期，即在同样的时间内，增加发送第一发送对象的信道检测的次数，进而提高发送第一发送对象的占用信道的概率；而当确定第一发送对象和第二发送对象对应的为基于负载(LBE)的LBT信道检测机制时，通过调整延长的信道检测时间(ECCA)的竞争窗口长度和/或在检测信道繁忙时的延长的信道检测时间的延迟时间(defer period)，具体地，使发送第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度(比如，q取4)小于发送第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度(比如，q取16到32之间的值)和/或使发送第一发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第一延迟时间(比如20us)小于发送 第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间(比如34us)，以提高发送第一发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述在确定发送所述第一发送对象和所述第二发送对象对应的为基于负载的LBT信道检测机制时，将发送所述第一发送对象对应的延长的信道检测时间的第一竞争窗口长度调整为小于发送所述第二发送对象对应的延长的信道检测时间的第二竞争窗口长度，具体包括：将所述第一竞争窗口长度和所述第二竞争窗口长度设置为固定竞争窗口长度值，并将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度；或者将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度设置为固定竞争窗口长度值，以及将发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度设置为可变竞争窗口长度值；或者将所述第一竞争窗口长度和所述第二竞争窗口长度设置为可变竞争窗口长度值，以及将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度的第一上限边界值和第一下限边界值分别调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度的第二上限边界值和第二下限边界值，并将所述第一竞争窗口长度的第一增长值调整为小于所述第二竞争窗口长度的第二增长值。
在该技术方案中，在确定发送第一发送对象和第二发送对象对应的为基于负载的LBT信道检测机制时，可以通过多种方式实现使发送第一发送对象对应的延长的信道检测时间的第一竞争窗口长度小于发送第二发送对象对应的延长的信道检测时间的第二竞争窗口长度，以确保方案的可实施性，具体包括以下几种：(1)在将第一竞争窗口长度和第二竞争窗口长度设置为固定竞争窗口长度值时，直接调整为第一竞争窗口长度小于第二竞争窗口长度；(2)通过将第一竞争窗口长度设置为固定竞争窗口长度值而将第二竞争窗口长度设置为可变竞争窗口长度值，以使第一竞争窗口长度小于第二竞争窗口长度；(3)在将第一竞争窗口长度和第二竞争 窗口长度设置为可变竞争窗口长度值时，通过使第一竞争窗口长度的第一上限边界值和第一下限边界值(即最大值和最小值)分别小于第二竞争窗口长度的第二上限边界值和第二下限边界值(即最大值和最小值)且使第一竞争窗口长度的第一增长值(比如增长值小于第一竞争窗口长度)小于第二竞争窗口长度的第二增长值(比如增长值与第二竞争窗口长度相等，即可成倍增长)，以使第一竞争窗口长度小于第二竞争窗口长度；如此，提高发送第一发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述第一发送对象包括：下行发送包含调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或发送上行的PUSCH数据；所述第二发送对象包括：发送下行的PDSCH数据。
在该技术方案中，第一发送对象优选地包括：在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或在上行信道发送的PUSCH数据，而第二发送对象优选地包括在下行信道发送的PDSCH数据，即在下行信道发送的PDSCH数据的优先级排名低于前两者，使在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令和在上行信道发送的PUSCH数据的占用信道的概率较大，进而提高LAA系统的上行吞吐量。
需要说明的是，在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令和在上行信道发送的PUSCH数据的优先级相互不影响，只要保证二者的优先级排名高于在下行信道发送的PDSCH数据即可。
在上述技术方案中，优选地，所述第一发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送；所述第二发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送。
在该技术方案中，第一发送对象优选地为发送上行的PUSCH数据，且其上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送， 而第二发送对象优选地为发送上行的PUSCH数据，且其上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送，以提高上行授权指示的调度信令是在非授权频段的PDCCH/EPDCCH上发送的上行发送PUSCH数据时占用上行信道的概率，进而提高LAA系统在非授权频段的上行吞吐量。
本发明的第二方面，提出了一种信道占用概率的调整系统，用于基站，包括：确定模块，用于确定所述基站待发送的第一发送对象和第二发送对象，其中，所述第一发送对象的优先级高于所述第二发送对象的优先级；判断模块，用于判断在发送所述第一发送对象时是否使用LBT信道检测机制；控制模块，用于在判定为否时，控制直接发送所述第一发送对象，且在发送所述第二发送对象时使用LBT信道检测机制；以及调整模块，用于在判定为是时，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的参数信息，以使发送所述第一发送对象占用信道的概率大于发送所述第二发送对象占用信道的概率。
在该技术方案中，对基站的不同发送对象设置不同的LBT信道检测机制或LBT信道检测机制的参数信息，以根据优先级区别抢占信道的概率，即提高优先级排名靠前的发送对象的占用信道的概率，具体地，对于优先级排名靠前的第一发送对象可以无需进行LBT信道检测直接发送，而对于优先级排名靠后的第二发送对象在发送之前必须进行LBT信道检测，如此，显然可以提高第一发送对象占用信道的概率，进而提高LAA系统的上行吞吐量；另外，如果在发送第一发送对象和第二发送对象均需要进行LBT信道检测，则可以通过调整发送不同的对象所对应的LBT信道检测机制的参数信息，以达到提高优先级排名靠前的发送对象的占用信道的概率的目的，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述调整模块具体用于：将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度调整为小于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度，其中，当为基于负载的LBT信道检测机制时，所述第一信道检测时间粒度和所述第二信道检测时间粒度包括：初始信道检测时间粒度 和延长的信道检测时间粒度；和/或将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测门限调整为大于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测门限；和/或确定发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的类型，以根据所述类型调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息。
在该技术方案中，当发送第一发送对象和第二发送对象均需要进行LBT信道检测时，可以通过以下方式中的一种或多种调整发送第一发送对象和第二发送对象所对应的LBT信道检测机制的参数信息，具体地包括：(1)通过调整信道检测时间粒度，也就是说，使发送第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度(比如，20us)小于发送第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度(比如，34us)，如此，通过缩短信道检测时间粒度的方式提高发送第一发送对象的占用信道的概率，优先地占用信道进行数据传输，其中，当为基于负载的LBT信道检测机制时，信道检测时间粒度至少包括初始信道检测时间粒度(initial CCA slot)和延长的信道检测时间粒度(ECCAslot)；(2)通过调整信道检测门限，也就是说，使发送第一发送对象所对应的LBT信道检测机制的第一信道检测门限大于发送第二发送对象所对应的LBT信道检测机制的第二信道检测门限，如此，通过增大信道检测门限可以提高对信道干扰的兼容性，进而提高发送第一发送对象的占用信道的概率；(3)通过根据发送不同的发送对象所对应的LBT信道检测机制的类型进一步细化调整参数信息，以提高优先级排名靠前的发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，在确定发送所述第一发送对象和所述第二发送对象对应的为基于帧结构的LBT信道检测机制时，所述调整模块具体用于：将发送所述第一发送对象所对应的第一信道检测时间的重复周期调整为小于发送所述第二发送对象所对应的第二信道检测时间的重复周期；以及在确定发送所述第一发送对象和所述第二发送对象对应的为基于负载的LBT信道检测机制时，所述调整模块具体用于：将发送所述第一 发送对象所对应的延长的信道检测时间的第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度；和/或将发送所述第一发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第一延迟时间调整为小于所述第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间。
在该技术方案中，当确定发送第一发送对象和第二发送对象对应的为基于帧结构(FBE)的LBT信道检测机制时，通过调整信道检测时间的重复周期，具体地，使发送第一发送对象所对应的第一信道检测时间的重复周期小于发送第二发送对象所对应的第二信道检测时间的重复周期，即在同样的时间内，增加发送第一发送对象的信道检测的次数，进而提高发送第一发送对象的占用信道的概率；而当确定第一发送对象和第二发送对象对应的为基于负载(LBE)的LBT信道检测机制时，通过调整延长的信道检测时间(ECCA)的竞争窗口长度和/或在检测信道繁忙时的延长的信道检测时间的延迟时间(defer period)，具体地，使发送第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度(比如，q取4)小于发送第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度(比如，q取16到32之间的值)和/或使发送第一发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第一延迟时间(比如20us)小于发送第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间(比如34us)，以提高发送第一发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，在确定发送所述第一发送对象和所述第二发送对象对应的为所述基于负载的LBT信道检测机制时，所述调整模块具体还用于：将所述第一竞争窗口长度和所述第二竞争窗口长度设置为固定竞争窗口长度值，并将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度；或者将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度设置为固定竞争窗口长度值，以及将发送所述第二发送对象所对应的延长的信道检测 时间的所述第二竞争窗口长度设置为可变竞争窗口长度值；或者将所述第一竞争窗口长度和所述第二竞争窗口长度设置为可变竞争窗口长度值，以及将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度的第一上限边界值和第一下限边界值分别调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度的第二上限边界值和第二下限边界值，并将所述第一竞争窗口长度的第一增长值调整为小于所述第二竞争窗口长度的第二增长值。
在该技术方案中，在确定发送第一发送对象和第二发送对象对应的为基于负载的LBT信道检测机制时，可以通过多种方式实现使发送第一发送对象对应的延长的信道检测时间的第一竞争窗口长度小于发送第二发送对象对应的延长的信道检测时间的第二竞争窗口长度，以确保方案的可实施性，具体包括以下几种：(1)在将第一竞争窗口长度和第二竞争窗口长度设置为固定竞争窗口长度值时，直接调整为第一竞争窗口长度小于第二竞争窗口长度；(2)通过将第一竞争窗口长度设置为固定竞争窗口长度值而将第二竞争窗口长度设置为可变竞争窗口长度值，以使第一竞争窗口长度小于第二竞争窗口长度；(3)在将第一竞争窗口长度和第二竞争窗口长度设置为可变竞争窗口长度值时，通过使第一竞争窗口长度的第一上限边界值和第一下限边界值(即最大值和最小值)分别小于第二竞争窗口长度的第二上限边界值和第二下限边界值(即最大值和最小值)且使第一竞争窗口长度的第一增长值(比如增长值小于第一竞争窗口长度)小于第二竞争窗口长度的第二增长值(比如增长值与第二竞争窗口长度相等，即可成倍增长)，以使第一竞争窗口长度小于第二竞争窗口长度；如此，提高发送第一发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述第一发送对象包括：下行发送包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或发送上行的PUSCH数据；所述第二发送对象包括：发送下行的PDSCH数据。
在该技术方案中，第一发送对象优选地包括：在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或在上行信道发送 的PUSCH数据，而第二发送对象优选地包括在下行信道发送的PDSCH数据，即在下行信道发送的PDSCH数据的优先级排名低于前两者，使在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令和在上行信道发送的PUSCH数据的占用信道的概率较大，进而提高LAA系统的上行吞吐量。
需要说明的是，在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令和在上行信道发送的PUSCH数据的优先级相互不影响，只要保证二者的优先级排名高于在下行信道发送的PDSCH数据即可。
在上述技术方案中，优选地，所述第一发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送；所述第二发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送。
在该技术方案中，第一发送对象优选地为发送上行的PUSCH数据，且其上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送，而第二发送对象优选地为发送上行的PUSCH数据，且其上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送，以提高上行授权指示的调度信令是在非授权频段的PDCCH/EPDCCH上发送的上行发送PUSCH数据时占用上行信道的概率，，进而提高LAA系统在非授权频段的上行吞吐量。
本发明的第三方面，提出了一种基站，包括：如上述第二方面中任一项所述的信道占用概率的调整系统，因此，该基站具有和第二方面中任一项所述的信道占用概率的调整系统相同的技术效果，在此不再赘述。
通过本发明的技术方案，可以有效地提高优先级排名靠前的发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
附图说明
图1示出了非授权频谱的两种工作方式的示意图；
图2示出了Wi-Fi系统的干扰避免规则的示意图；
图3示出了相关技术中基于FBE的帧结构的结构示意图；
图4示出了相关技术中基于LBE的帧结构的结构示意图；
图5示出了根据本发明的一个实施例的信道占用概率的调整方法的流程示意图；
图6示出了根据本发明的一个实施例的信道占用概率的调整系统的框图；
图7示出了根据本发明的一个实施例的基站的框图。
具体实施方式
为了可以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5示出了根据本发明的一个实施例的信道占用概率的调整方法的流程示意图。
如图5所示，根据本发明的一个实施例的信道占用概率的调整方法，用于基站，包括：步骤502，确定所述基站待发送的第一发送对象和第二发送对象，其中，所述第一发送对象的优先级高于所述第二发送对象的优先级；步骤504，判断在发送所述第一发送对象时是否使用LBT信道检测机制，在判定为否时，执行步骤506，否则，在判定为是时，执行步骤508；所述步骤506，直接发送所述第一发送对象，且在发送所述第二发送对象时使用LBT信道检测机制；所述步骤508，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的参数信息，以使发送所述第一发送对象占用信道的概率大于发送所述第二发送对象占用信道的概率。
在该技术方案中，对基站的不同发送对象设置不同的LBT信道检测 机制或LBT信道检测机制的参数信息，以根据优先级区别抢占信道的概率，即提高优先级排名靠前的发送对象的占用信道的概率，具体地，对于优先级排名靠前的第一发送对象可以无需进行LBT信道检测直接发送，而对于优先级排名靠后的第二发送对象在发送之前必须进行LBT信道检测，如此，显然可以提高第一发送对象占用信道的概率，进而提高LAA系统的上行吞吐量；另外，如果在发送第一发送对象和第二发送对象均需要进行LBT信道检测，则可以通过调整发送不同的对象所对应的LBT信道检测机制的参数信息，以达到提高优先级排名靠前的发送对象的占用信道的概率的目的，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述步骤508具体包括：将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度调整为小于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度，其中，当为基于负载的LBT信道检测机制时，所述第一信道检测时间粒度和所述第二信道检测时间粒度包括：初始信道检测时间粒度和延长的信道检测时间粒度；和/或将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测门限调整为大于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测门限；和/或确定发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的类型，以根据所述类型调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息。
在该技术方案中，当发送第一发送对象和第二发送对象均需要进行LBT信道检测时，可以通过以下方式中的一种或多种调整发送第一发送对象和第二发送对象所对应的LBT信道检测机制的参数信息，具体地包括：(1)通过调整信道检测时间粒度，也就是说，使发送第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度(比如，20us)小于发送第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度(比如，34us)，如此，通过缩短信道检测时间粒度的方式提高发送第一发送对象的占用信道的概率，优先地占用信道进行数据传输，其中，当为基于负载的LBT信道检测机制时，信道检测时间粒度至少包括初始信 道检测时间粒度(initial CCA slot)和延长的信道检测时间粒度(ECCA slot)，比如，发送下行PDSCH数据的LBT信道检测机制中，initial CCA检测时间粒度是34us，extended CCA的检测时间粒度是20us，而下行PDCCH/EPDCCH发送UL grant(或发送上行的PUSCH)数据的LBT信道检测机制中，initial CCA检测时间粒度为20us，extended CCA检测时间粒度为9us；(2)通过调整信道检测门限，也就是说，使发送第一发送对象所对应的LBT信道检测机制的第一信道检测门限大于发送第二发送对象所对应的LBT信道检测机制的第二信道检测门限，如此，通过增大信道检测门限可以提高对信道干扰的兼容性，即只要信道干扰不是很大，就能发送第一发送对象，进而提高发送第一发送对象的占用信道的概率；(3)通过根据发送不同的发送对象所对应的LBT信道检测机制的类型进一步细化调整参数信息，以提高优先级排名靠前的发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述确定发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的类型，以根据所述类型调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息，具体包括：在确定发送所述第一发送对象和所述第二发送对象对应的为基于帧结构的LBT信道检测机制时，将发送所述第一发送对象所对应的第一信道检测时间的重复周期调整为小于发送所述第二发送对象所对应的第二信道检测时间的重复周期；以及在确定发送所述第一发送对象和所述第二发送对象对应的为基于负载的LBT信道检测机制时，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息，包括：将发送所述第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度；和/或将发送所述第一发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第一延迟时间调整为小于所述第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间。
在该技术方案中，当确定发送第一发送对象和第二发送对象对应的为 基于帧结构(FBE)的LBT信道检测机制时，通过调整信道检测时间的重复周期，具体地，使发送第一发送对象所对应的第一信道检测时间的重复周期小于发送第二发送对象所对应的第二信道检测时间的重复周期，即在同样的时间内，增加发送第一发送对象的信道检测的次数，进而提高发送第一发送对象的占用信道的概率；而当确定第一发送对象和第二发送对象对应的为基于负载(LBE)的LBT信道检测机制时，通过调整延长的信道检测时间(ECCA)的竞争窗口长度和/或在检测信道繁忙时的延长的信道检测时间的延迟时间(defer period)，具体地，使发送第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度(比如，q取4)小于发送第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度(比如，q取16到32之间的值)和/或使发送第一发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第一延迟时间(比如20us)小于发送第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间(比如34us)，以提高发送第一发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述在确定发送所述第一发送对象和所述第二发送对象对应的为基于负载的LBT信道检测机制时，将发送所述第一发送对象对应的延长的信道检测时间的第一竞争窗口长度调整为小于发送所述第二发送对象对应的延长的信道检测时间的第二竞争窗口长度，具体包括：将所述第一竞争窗口长度和所述第二竞争窗口长度设置为固定竞争窗口长度值，并将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度；或者将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度设置为固定竞争窗口长度值，以及将发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度设置为可变竞争窗口长度值；或者将所述第一竞争窗口长度和所述第二竞争窗口长度设置为可变竞争窗口长度值，以及将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度的第一上限边界值和第一下限边界值分别调整为小于发送所述第二发 送对象所对应的延长的信道检测时间的所述第二竞争窗口长度的第二上限边界值和第二下限边界值，并将所述第一竞争窗口长度的第一增长值调整为小于所述第二竞争窗口长度的第二增长值。
在该技术方案中，在确定发送第一发送对象和第二发送对象对应的为基于负载的LBT信道检测机制时，可以通过多种方式实现使发送第一发送对象对应的延长的信道检测时间的第一竞争窗口长度小于发送第二发送对象对应的延长的信道检测时间的第二竞争窗口长度，以确保方案的可实施性，具体包括以下几种：(1)在将第一竞争窗口长度和第二竞争窗口长度设置为固定竞争窗口长度值时，直接调整为第一竞争窗口长度小于第二竞争窗口长度，即使得当LBT信道检测机制是基于LBE的时，随机数N取较小值时占用信道的概率高，比如，对于发送第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度的值取4，而发送第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度的值取16到32，那么发送第一发送对象所对应的LBT信道检测机制中随机数N从1～q中取，则会取较小值，就意味着需要在更少个CCA检测时间检测到信道空闲时，就发送第一发送对象；(2)通过将第一竞争窗口长度设置为固定竞争窗口长度值而将第二竞争窗口长度设置为可变竞争窗口长度值，以使第一竞争窗口长度小于第二竞争窗口长度；(3)在将第一竞争窗口长度和第二竞争窗口长度设置为可变竞争窗口长度值时，通过使第一竞争窗口长度的第一上限边界值和第一下限边界值(即最大值和最小值)分别小于第二竞争窗口长度的第二上限边界值和第二下限边界值(即最大值和最小值)且使第一竞争窗口长度的第一增长值(比如增长值小于第一竞争窗口长度)小于第二竞争窗口长度的第二增长值(比如增长值与第二竞争窗口长度相等，即可成倍增长)，以使第一竞争窗口长度小于第二竞争窗口长度；如此，提高发送第一发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述第一发送对象包括：下行发送包含调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或发送上行的PUSCH数据；所述第二发送对象包括：发送下行的PDSCH数据。
在该技术方案中，第一发送对象优选地包括：在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或在上行信道发送的PUSCH数据，而第二发送对象优选地包括在下行信道发送的PDSCH数据，即在下行信道发送的PDSCH数据的优先级排名低于前两者，使在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令和在上行信道发送的PUSCH数据的占用信道的概率较大，进而提高LAA系统的上行吞吐量。
需要说明的是，在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令和在上行信道发送的PUSCH数据的优先级相互不影响，只要保证二者的优先级排名高于在下行信道发送的PDSCH数据即可。
在上述技术方案中，优选地，所述第一发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送；所述第二发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送。
在该技术方案中，第一发送对象优选地为发送上行的PUSCH数据，且其上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送，而第二发送对象优选地为发送上行的PUSCH数据，且其上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送，以提高上行授权指示的调度信令是在非授权频段的PDCCH/EPDCCH上发送的上行发送PUSCH数据时占用上行信道的概率，进而提高LAA系统在非授权频段的上行吞吐量。
图6示出了根据本发明的一个实施例的信道占用概率的调整系统的框图。
如图6所示，根据本发明的一个实施例的信道占用概率的调整系统600，用于基站，包括：确定模块602，用于确定所述基站待发送的第一发送对象和第二发送对象，其中，所述第一发送对象的优先级高于所述第二发送对象的优先级；判断模块604，用于判断在发送所述第一发送对象 时是否使用LBT信道检测机制；控制模块606，用于在判定为否时，控制直接发送所述第一发送对象，且在发送所述第二发送对象时使用LBT信道检测机制；以及调整模块608，用于在判定为是时，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的参数信息，以使发送所述第一发送对象占用信道的概率大于发送所述第二发送对象占用信道的概率。
在该技术方案中，对基站的不同发送对象设置不同的LBT信道检测机制或LBT信道检测机制的参数信息，以根据优先级区别抢占信道的概率，即提高优先级排名靠前的发送对象的占用信道的概率，具体地，对于优先级排名靠前的第一发送对象可以无需进行LBT信道检测直接发送，而对于优先级排名靠后的第二发送对象在发送之前必须进行LBT信道检测，如此，显然可以提高第一发送对象占用信道的概率，进而提高LAA系统的上行吞吐量；另外，如果在发送第一发送对象和第二发送对象均需要进行LBT信道检测，则可以通过调整发送不同的对象所对应的LBT信道检测机制的参数信息，以达到提高优先级排名靠前的发送对象的占用信道的概率的目的，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述调整模块608具体用于：将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度调整为小于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度，其中，当为基于负载的LBT信道检测机制时，所述第一信道检测时间粒度和所述第二信道检测时间粒度包括：初始信道检测时间粒度和延长的信道检测时间粒度；和/或将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测门限调整为大于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测门限；和/或确定发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的类型，以根据所述类型调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息。
在该技术方案中，当发送第一发送对象和第二发送对象均需要进行LBT信道检测时，可以通过以下方式中的一种或多种调整发送第一发送对 象和第二发送对象所对应的LBT信道检测机制的参数信息，具体地包括：(1)通过调整信道检测时间粒度，也就是说，使发送第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度(比如，20us)小于发送第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度(比如，34us)，如此，通过缩短信道检测时间粒度的方式提高发送第一发送对象的占用信道的概率，优先地占用信道进行数据传输，其中，当为基于负载的LBT信道检测机制时，信道检测时间粒度至少包括初始信道检测时间粒度(initial CCA slot)和延长的信道检测时间粒度(ECCA slot)，比如，发送下行PDSCH数据的LBT信道检测机制中，initial CCA检测时间粒度是34us，extended CCA的检测时间粒度是20us，而下行PDCCH/EPDCCH发送UL grant(或发送上行的PUSCH)数据的LBT信道检测机制中，initial CCA检测时间粒度为20us，extended CCA检测时间粒度为9us；(2)通过调整信道检测门限，也就是说，使发送第一发送对象所对应的LBT信道检测机制的第一信道检测门限大于发送第二发送对象所对应的LBT信道检测机制的第二信道检测门限，如此，通过增大信道检测门限可以提高对信道干扰的兼容性，即只要信道干扰不是很大，就能发送第一发送对象，进而提高发送第一发送对象的占用信道的概率；(3)通过根据发送不同的发送对象所对应的LBT信道检测机制的类型进一步细化调整参数信息，以提高优先级排名靠前的发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，在确定发送所述第一发送对象和所述第二发送对象对应的为基于帧结构的LBT信道检测机制时，所述调整模块608具体用于：将发送所述第一发送对象所对应的第一信道检测时间的重复周期调整为小于发送所述第二发送对象所对应的第二信道检测时间的重复周期；以及在确定发送所述第一发送对象和所述第二发送对象对应的为基于负载的LBT信道检测机制时，所述调整模块608具体用于：将发送所述第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度；和/或将发送所述第一发送对象所对应的在检测到信道繁忙时的 延长的信道检测时间的第一延迟时间调整为小于所述第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间。
在该技术方案中，当确定发送第一发送对象和第二发送对象对应的为基于帧结构(FBE)的LBT信道检测机制时，通过调整信道检测时间的重复周期，具体地，使发送第一发送对象所对应的第一信道检测时间的重复周期小于发送第二发送对象所对应的第二信道检测时间的重复周期，即在同样的时间内，增加发送第一发送对象的信道检测的次数，进而提高发送第一发送对象的占用信道的概率；而当确定第一发送对象和第二发送对象对应的为基于负载(LBE)的LBT信道检测机制时，通过调整延长的信道检测时间(ECCA)的竞争窗口长度和/或在检测信道繁忙时的延长的信道检测时间的延迟时间(defer period)，具体地，使发送第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度(比如，q取4)小于发送第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度(比如，q取16到32之间的值)和/或使发送第一发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第一延迟时间(比如20us)小于发送第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间(比如34us)，以提高发送第一发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，在确定发送所述第一发送对象和所述第二发送对象对应的为所述基于负载的LBT信道检测机制时，所述调整模块具体608用于：将所述第一竞争窗口长度和所述第二竞争窗口长度设置为固定竞争窗口长度值，并将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度；或者将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度设置为固定竞争窗口长度值，以及将发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度设置为可变竞争窗口长度值；或者将所述第一竞争窗口长度和所述第二竞争窗口长度设置为可变竞争窗口长度值，以及将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞 争窗口长度的第一上限边界值和第一下限边界值分别调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度的第二上限边界值和第二下限边界值，并将所述第一竞争窗口长度的第一增长值调整为小于所述第二竞争窗口长度的第二增长值。
在该技术方案中，在确定发送第一发送对象和第二发送对象对应的为基于负载的LBT信道检测机制时，可以通过多种方式实现使发送第一发送对象对应的延长的信道检测时间的第一竞争窗口长度小于发送第二发送对象对应的延长的信道检测时间的第二竞争窗口长度，以确保方案的可实施性，具体包括以下几种：(1)在将第一竞争窗口长度和第二竞争窗口长度设置为固定竞争窗口长度值时，直接调整为第一竞争窗口长度小于第二竞争窗口长度，即使得当LBT信道检测机制是基于LBE的时，随机数N取较小值时占用信道的概率高，比如，对于发送第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度的值取4，而发送第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度的值取16到32，那么发送第一发送对象所对应的LBT信道检测机制中随机数N从1～q中取，则会取较小值，就意味着需要在更少个CCA检测时间检测到信道空闲时，就发送第一发送对象；(2)通过将第一竞争窗口长度设置为固定竞争窗口长度值而将第二竞争窗口长度设置为可变竞争窗口长度值，以使第一竞争窗口长度小于第二竞争窗口长度；(3)在将第一竞争窗口长度和第二竞争窗口长度设置为可变竞争窗口长度值时，通过使第一竞争窗口长度的第一上限边界值和第一下限边界值(即最大值和最小值)分别小于第二竞争窗口长度的第二上限边界值和第二下限边界值(即最大值和最小值)且使第一竞争窗口长度的第一增长值(比如增长值小于第一竞争窗口长度)小于第二竞争窗口长度的第二增长值(比如增长值等于第二竞争窗口长度，即可成倍增长)，以使第一竞争窗口长度小于第二竞争窗口长度；如此，提高发送第一发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
在上述技术方案中，优选地，所述第一发送对象包括：下行发送包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或发送上行的 PUSCH数据；所述第二发送对象包括：发送下行的PDSCH数据。
在该技术方案中，第一发送对象优选地包括：在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或在上行信道发送的PUSCH数据，而第二发送对象优选地包括在下行信道发送的PDSCH数据，即在下行信道发送的PDSCH数据的优先级排名低于前两者，使在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令和在上行信道发送的PUSCH数据的占用信道的概率较大，进而提高LAA系统的上行吞吐量。
需要说明的是，在下行信道发送时包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令和在上行信道发送的PUSCH数据的优先级相互不影响，只要保证二者的优先级排名高于在下行信道发送的PDSCH数据即可。
在上述技术方案中，优选地，所述第一发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送；所述第二发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送。
在该技术方案中，第一发送对象优选地为发送上行的PUSCH数据，且其上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送，而第二发送对象优选地为发送上行的PUSCH数据，且其上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送，以提高上行授权指示的调度信令是在非授权频段的PDCCH/EPDCCH上发送的上行发送PUSCH数据时占用上行信道的概率，进而提高LAA系统在非授权频段的上行吞吐量。
图7示出了根据本发明的一个实施例的基站的框图。
如图7所示，根据本发明的一个实施例的基站700，包括：如上述第二方面中任一项所述的信道占用概率的调整系统600，因此，该基站700具有和第二方面中任一项所述的信道占用概率的调整系统600相同的技术效果，在此不再赘述。
以上结合附图详细说明了本发明的技术方案，根据基站发送对象的不同，设置不同的LBT信道检测机制或参数，使优先级排名靠前的发送对象可以优先占用信道，即可以有效地提高优先级排名靠前的发送对象的占用信道的概率，进而提高LAA系统的上行吞吐量。
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 (13)

  1. 一种信道占用概率的调整方法，用于基站，其特征在于，包括：
    确定所述基站待发送的第一发送对象和第二发送对象，其中，所述第一发送对象的优先级高于所述第二发送对象的优先级；
    判断在发送所述第一发送对象时是否使用LBT信道检测机制；
    在判定为否时，直接发送所述第一发送对象，且在发送所述第二发送对象时使用LBT信道检测机制；
    在判定为是时，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的参数信息，以使发送所述第一发送对象占用信道的概率大于发送所述第二发送对象占用信道的概率。
  2. 根据权利要求1所述的信道占用概率的调整方法，其特征在于，所述在判定为是时，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的参数信息，以使发送所述第一发送对象占用信道的概率大于发送所述第二发送对象占用信道的概率，具体包括：
    将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度调整为小于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度，其中，当为基于负载的LBT信道检测机制时，所述第一信道检测时间粒度和所述第二信道检测时间粒度包括：初始信道检测时间粒度和延长的信道检测时间粒度；和/或
    将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测门限调整为大于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测门限；和/或
    确定发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的类型，以根据所述类型调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息。
  3. 根据权利要求2所述的信道占用概率的调整方法，其特征在于，所述确定发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的类型，以根据所述类型调整发送所述第一发送对象和所述第 二发送对象分别对应的LBT信道检测机制的所述参数信息，具体包括：
    在确定发送所述第一发送对象和所述第二发送对象对应的为基于帧结构的LBT信道检测机制时，将发送所述第一发送对象所对应的第一信道检测时间的重复周期调整为小于发送所述第二发送对象所对应的第二信道检测时间的重复周期；以及
    在确定发送所述第一发送对象和所述第二发送对象对应的为基于负载的LBT信道检测机制时，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息，包括：
    将发送所述第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度；和/或
    将发送所述第一发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第一延迟时间调整为小于所述第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间。
  4. 根据权利要求3所述的信道占用概率的调整方法，其特征在于，所述在确定发送所述第一发送对象和所述第二发送对象对应的为基于负载的LBT信道检测机制时，将发送所述第一发送对象对应的延长的信道检测时间的第一竞争窗口长度调整为小于发送所述第二发送对象对应的延长的信道检测时间的第二竞争窗口长度，具体包括：
    将所述第一竞争窗口长度和所述第二竞争窗口长度设置为固定竞争窗口长度值，并将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度；或者
    将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度设置为固定竞争窗口长度值，以及将发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度设置为可变竞争窗口长度值；或者
    将所述第一竞争窗口长度和所述第二竞争窗口长度设置为可变竞争窗口长度值，以及将发送所述第一发送对象所对应的延长的信道检测时间的 所述第一竞争窗口长度的第一上限边界值和第一下限边界值分别调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度的第二上限边界值和第二下限边界值，并将所述第一竞争窗口长度的第一增长值调整为小于所述第二竞争窗口长度的第二增长值。
  5. 根据权利要求1至4中任一项所述的信道占用概率的调整方法，其特征在于，
    所述第一发送对象包括：下行发送包含调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或发送上行的PUSCH数据；
    所述第二发送对象包括：发送下行的PDSCH数据。
  6. 根据权利要求1至4中任一项所述的信道占用概率的调整方法，其特征在于，
    所述第一发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送；
    所述第二发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送。
  7. 一种信道占用概率的调整系统，用于基站，其特征在于，包括：
    确定模块，用于确定所述基站待发送的第一发送对象和第二发送对象，其中，所述第一发送对象的优先级高于所述第二发送对象的优先级；
    判断模块，用于判断在发送所述第一发送对象时是否使用LBT信道检测机制；
    控制模块，用于在判定为否时，控制直接发送所述第一发送对象，且在发送所述第二发送对象时使用LBT信道检测机制；以及
    调整模块，用于在判定为是时，调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的参数信息，以使发送所述第一发送对象占用信道的概率大于发送所述第二发送对象占用信道的概率。
  8. 根据权利要求7所述的信道占用概率的调整系统，其特征在于，所述调整模块具体用于：
    将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测时间粒度调整为小于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测时间粒度，其中，当为基于负载的LBT信道检测机制时，所述第一信道检测时间粒度和所述第二信道检测时间粒度包括：初始信道检测时间粒度和延长的信道检测时间粒度；和/或
    将发送所述第一发送对象所对应的LBT信道检测机制的第一信道检测门限调整为大于发送所述第二发送对象所对应的LBT信道检测机制的第二信道检测门限；和/或
    确定发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的类型，以根据所述类型调整发送所述第一发送对象和所述第二发送对象分别对应的LBT信道检测机制的所述参数信息。
  9. 根据权利要求8所述的信道占用概率的调整系统，其特征在于，
    在确定发送所述第一发送对象和所述第二发送对象对应的为基于帧结构的LBT信道检测机制时，所述调整模块具体用于：将发送所述第一发送对象所对应的第一信道检测时间的重复周期调整为小于发送所述第二发送对象所对应的第二信道检测时间的重复周期；以及
    在确定发送所述第一发送对象和所述第二发送对象对应的为基于负载的LBT信道检测机制时，所述调整模块具体用于：
    将发送所述第一发送对象所对应的延长的信道检测时间的第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的第二竞争窗口长度；和/或
    将发送所述第一发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第一延迟时间调整为小于所述第二发送对象所对应的在检测到信道繁忙时的延长的信道检测时间的第二延迟时间。
  10. 根据权利要求9所述的信道占用概率的调整系统，其特征在于，在确定发送所述第一发送对象和所述第二发送对象对应的为所述基于负载的LBT信道检测机制时，所述调整模块具体还用于：
    将所述第一竞争窗口长度和所述第二竞争窗口长度设置为固定竞争窗口长度值，并将发送所述第一发送对象所对应的延长的信道检测时间的所 述第一竞争窗口长度调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度；或者
    将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度设置为固定竞争窗口长度值，以及将发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度设置为可变竞争窗口长度值；或者
    将所述第一竞争窗口长度和所述第二竞争窗口长度设置为可变竞争窗口长度值，以及将发送所述第一发送对象所对应的延长的信道检测时间的所述第一竞争窗口长度的第一上限边界值和第一下限边界值分别调整为小于发送所述第二发送对象所对应的延长的信道检测时间的所述第二竞争窗口长度的第二上限边界值和第二下限边界值，并将所述第一竞争窗口长度的第一增长值调整为小于所述第二竞争窗口长度的第二增长值。
  11. 根据权利要求7至10中任一项所述的信道占用概率的调整系统，其特征在于，
    所述第一发送对象包括：下行发送包括调度上行PUSCH的授权指示的PDCCH/EPDCCH信令或发送上行的PUSCH数据；
    所述第二发送对象包括：发送下行的PDSCH数据。
  12. 根据权利要求7至10中任一项所述的信道占用概率的调整系统，其特征在于，
    所述第一发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过非授权频段的PDCCH/EPDCCH发送；
    所述第二发送对象包括：发送上行的PUSCH数据，且所述发送上行的PUSCH数据的上行授权指示的调度信令通过授权频段的PDCCH/EPDCCH发送。
  13. 一种基站，其特征在于，包括：如权利要求7至12中任一项所述的信道占用概率的调整系统。
PCT/CN2015/091369 2015-07-08 2015-09-30 信道占用概率的调整方法、调整系统和基站 Ceased WO2017004901A1 (zh)

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