CN104994591B

CN104994591B - Method of adjustment, adjustment system and the base station of channel occupancy probabilities

Info

Publication number: CN104994591B
Application number: CN201510398188.4A
Authority: CN
Inventors: 李明菊; 朱亚军; 张云飞
Original assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Current assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Priority date: 2015-07-08
Filing date: 2015-07-08
Publication date: 2019-06-11
Anticipated expiration: 2035-07-08
Also published as: WO2017004901A1; CN104994591A

Abstract

The invention proposes a kind of method of adjustment of channel occupancy probabilities, a kind of adjustment system of channel occupancy probabilities and a kind of base stations, the method of adjustment of the channel occupancy probabilities comprises determining that base station the first sending object and the second sending object to be sent, wherein, the priority of the first sending object is higher than the priority of the second sending object；Judge LBT Channel Detection mechanism whether is used when sending the first sending object；When being determined as no, the first sending object is directly transmitted, and uses LBT Channel Detection mechanism when sending the second sending object；When being determined as is, adjustment sends the parameter information of the first sending object and the corresponding LBT Channel Detection mechanism of the second sending object, so that the probability for sending the first sending object busy channel is greater than the probability for sending the second sending object busy channel.The technical solution can effectively improve the probability of the busy channel of the forward sending object of priority rank, and then improve the uplink throughput of LAA system.

Description

Method of adjustment, adjustment system and the base station of channel occupancy probabilities

Technical field

The present invention relates to fields of communication technology, method of adjustment, Yi Zhongxin in particular to a kind of channel occupancy probabilities The adjustment system of road acquistion probability and a kind of base station.

Background technique

With the sharp increase of message volume, 3GPP (The 3^rdGeneration Partnership Project, 3G (Third Generation) Moblie partnership) authorization frequency spectrum it is less and less adequate to provide higher network capacity.In order to further mention The utilization rate of high frequency spectrum resource, 3GPP just discussing how with the help of authorizing frequency spectrum using unlicensed spectrum, such as 2.4GHz and 5GHz frequency range.These unlicensed spectrums are presently mainly that the systems such as Wi-Fi, bluetooth, radar, medical treatment are using.

Under normal conditions, be the access technology of the design of authorized spectrum band, as LTE (Long Term Evolution, for a long time Evolution) be not suitable for using in unauthorized frequency range, because this kind of access technology of LTE wants spectrum efficiency and user experience optimization Ask very high.However, carrier wave polymerization (Carrier Aggregation, CA) function allows and LTE is deployed in unauthorized frequency range becomes It may.3GPP proposes the concept of LAA (access of LTE Assisted Access, LTE auxiliary), by the side of LTE authorization frequency spectrum It helps using unlicensed spectrum.And unlicensed spectrum can there are two types of working method, one is supplement downlink (SDL, Supplemental Downlink), i.e. only downlink transfer subframe；Another kind is tdd mode, both includes downlink subframe, uplink Subframe.Supplementing downlink such case can only use by carrier aggregation technology.And tdd mode by carrier wave in addition to that can polymerize Technology can also be used by DC (Dual Connectivity, doubly-linked are logical), can also independently be used outside.Such as Fig. 1 institute Show.

Compared to Wi-Fi system, the LTE system in unauthorized frequency range that works has the ability to provide higher spectrum efficiency and more Big coverage effect, while allowing data traffic between authorized spectrum band and unauthorized frequency range without seaming and cutting based on the same core net It changes.For users, it means that better broadband experience, higher rate, better stability and mobile convenience.

The existing access technology used in unlicensed spectrum, such as Wi-Fi have weaker anti-interference ability.In order to It avoids interfering, Wi-Fi system devises many interference and avoids rule, such as CSMA/CD (Carrier Sense Multiple Access/Collision Detection, csma/collision detection method), the basic principle of this method It is that either terminal wants first Monitor detection week before sending signaling or data by the AP (Access Point, access point) of Wi-Fi Whether have other APs or other terminals in transmission/reception signaling or data, if so, then continuing to monitor, until listening to not if enclosing Until having；If no, generating a random number as back off time, in this back off time, if not detected letter It enables or data is transmitted, then AP or terminal can start to send signaling or data after back off time terminates.The process is as schemed Shown in 2.

But due to there is good orthogonality to ensure that interference level in LTE network, so the uplink and downlink of base station and user Transmission does not have to consider whether surrounding has other base stations or other users in transmission data.If LTE is used in unauthorized frequency range When do not consider yet around whether have other equipment use unauthorized frequency range, then great interference will be brought to Wi-Fi equipment. Because LTE is transmitted as long as having business, without any monitoring rule, then Wi-Fi equipment when LTE has business transmission just It cannot transmit, can only be transmitted until LTE business, can just detect channel clear to carry out data transmission.

So LTE is when using unauthorized frequency range, one of most important key point is to ensure that LAA (LTE assisted The access technology of access, LTE auxiliary) it can be total on the basis of fair friendly with existing access technology (such as Wi-Fi) It deposits.And there is no the mechanism of LBT (Listen Before Talk, listem-before-talk) in traditional LTE system to avoid collision.In order to It is preferably coexisted with Wi-Fi, LTE needs a kind of LBT mechanism.In this way, LTE in unlicensed spectrum if detecting channel busy, The frequency range cannot be then occupied, if detecting the channel spare time, could be occupied.

Based on the above issues, currently, proposing a kind of (FBE, Frame based equipment's) based on frame structure LBT mechanism (as shown in Figure 3), left oblique line are the channel inspections of CCA (Clear Channel Assessment, clear channel assessment (CCA)) The time is surveyed, CCA detection time is repeated cyclically appearance, if detecting channel idle, busy channel is reached in Channel holding time To after maximum channel holding time, there is idle (free time) time, in the idle time, sending point does not send signal sum number According in order to which channel is seized in other sending points.After the idle time, and there is CCA detection time, if detecting channel busy, It is then not take up channel, detects channel again when the CCA detection time in next period occurs.Certainly, Channel Detection Time Belong to the idle time, idle duration has to be larger than the 5% of channel maximum holding time.When the idle time adds channel occupancy maximum Between i.e. the period.

At present, it is also proposed that a kind of LBT mechanism of (LBE, Load based equipment) based on load, such as following figure Shown in 4: the LBT mechanism based on LBE is no periodic, as long as business reaches, triggers CCA detection, if CCA detection is idle, Signaling or data are then sent at once；If detecting channel busy, a random number N is taken, the value range of N (competes for 1 to q Length of window), the value range of q is 4 to 32.Fig. 4 shows the case where q=16, at this point, when detecting channel idle, letter Road maximum holding time is (13/32) x q=6.5ms.After 6.5ms, extended CCA (extended Channel Detection is taken Time) mechanism, i.e., and the range of random value N, N are 1 to 16, if value is 8, then it represents that in next continuous CCA In detection time, each CCA detection time will detect channel, if detecting channel idle, N-1, and if detecting channel busy, Then N is constant, when N is 0, sends signaling or data.

In addition, in order to further keep fairness with Wi-Fi, LBE takes different initial CCA (initial channels Detection time) and extended CCA (ECCA, extended Channel Detection Time) value, such as first time CCA detection, cry Initial CCA, this time granularity is bigger, such as 34us；When detecting that channel busy or Channel holding time end it The time granularity of ECCA afterwards is smaller, such as 9us.In addition, if detecting channel busy, to increase by one in Channel Detection A defer period (delay time), the value of the defer period are suitable with the value of initial CCA, that is to say, that necessary It detects channel idle for a long time again, N-1 could be continued.

And for uplink PUSCH (Physical Uplink Shared Channel, the shared letter of physical uplink in LAA Road) transmission, there are two types of situation: the first situation is the UL grant (uplink authorization instruction) for the PUSCH resource for dispatching LAA Be by unlicensed spectrum PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) or EPDCCH (Enhanced Physical Downlink Control Channel, the Physical Downlink Control Channel of enhancing) hair It send, in this case, eNB (base station) will first do the LBT detection of downlink, i.e., eNB first does downlink when sending UL grant LBT detection, retransmits UL grant；UE (terminal) is receiving UL grant and then is carrying out the LBT detection of uplink, retransmits PUSCH, so that UL PUSCH is more difficult to send；Second situation is that the UL grant for the PUSCH resource for dispatching LAA is by authorizing PDCCH or EPDCCH on frequency spectrum are sent, and in this case, eNB is when sending UL grant, because being sent out on authorization frequency spectrum It send, so not having to the LBT detection for carrying out downlink, in scheduled UE after receiving UL grant, carries out the LBT inspection of uplink It surveys, PUSCH is then retransmited, so that the easy transmission of PUSCH.

Therefore, the uplink throughput performance for how improving LAA system becomes urgent problem to be solved.

Summary of the invention

The present invention is based on the above problems, proposes a kind of new technical solution, according to the difference of base station sending object, Different LBT Channel Detection mechanism or parameter is set, the preferential busy channel of the sending object for keeping priority rank forward, i.e., The probability of the busy channel of the forward sending object of priority rank can be effectively improved, and then improves the uplink of LAA system Throughput performance.

In view of this, first aspect of the present invention it is proposed a kind of method of adjustment of channel occupancy probabilities, is used for base station, Comprise determining that the base station the first sending object and the second sending object to be sent, wherein first sending object it is excellent First grade is higher than the priority of second sending object；Judge whether use LBT channel when sending first sending object Testing mechanism；When being determined as no, first sending object is directly transmitted, and use when sending second sending object LBT Channel Detection mechanism；When being determined as is, adjustment sends first sending object and second sending object is right respectively The parameter information for the LBT Channel Detection mechanism answered is sent so that the probability for sending the first sending object busy channel is greater than The probability of the second sending object busy channel.

In the technical scheme, the different sending objects of base station are arranged with different LBT Channel Detection mechanism or LBT channel The parameter information of testing mechanism, to seize the probability of channel, the i.e. forward transmission of raising priority rank according to priority difference The probability of the busy channel of object, specifically, first sending object forward for priority rank, which may not need, carries out LBT letter Road detection directly transmits, and must carry out LBT channel inspection before transmitting for the second sending object of priority rank rearward It surveys, so, it is clear that the probability of the first sending object busy channel can be improved, and then improve the uplink throughput of LAA system；Separately It outside, can be by adjusting hair if being required to carry out LBT Channel Detection in the first sending object of transmission and the second sending object The parameter information of LBT Channel Detection mechanism corresponding to different objects is sent, improves the forward transmission of priority rank to reach The purpose of the probability of the busy channel of object, and then improve the uplink throughput of LAA system.

In the above-mentioned technical solutions, it is preferable that described when being determined as is, adjustment sends first sending object and institute The parameter information of the corresponding LBT Channel Detection mechanism of the second sending object is stated, is accounted for so as to send first sending object It is greater than the probability for sending the second sending object busy channel with the probability of channel, specifically includes: first hair will be sent The first Channel Detection Time granularity of LBT Channel Detection mechanism corresponding to object is sent to be adjusted to be less than transmission second transmission The second channel detection time granularity of LBT Channel Detection mechanism corresponding to object, wherein when for the LBT channel based on load When testing mechanism, the first Channel Detection Time granularity and the second channel detection time granularity include: initial channel inspection Survey time granularity and extended Channel Detection Time granularity；And/or LBT channel corresponding to first sending object will be sent First Channel Detection thresholding of testing mechanism, which is adjusted to be greater than, sends LBT Channel Detection machine corresponding to second sending object The second channel detection threshold of system；And/or determine that sending first sending object and second sending object respectively corresponds LBT Channel Detection mechanism type, sent with sending first sending object and described second according to type adjustment The parameter information of the corresponding LBT Channel Detection mechanism of object.

In the technical scheme, when the first sending object of transmission and the second sending object are required to carry out LBT Channel Detection When, it can one of in the following manner or a variety of adjustment are sent corresponding to the first sending object and the second sending object The parameter information of LBT Channel Detection mechanism specifically includes: (1) by adjusting Channel Detection Time granularity, that is to say, that is made The the first Channel Detection Time granularity (for example, 20us) for sending LBT Channel Detection mechanism corresponding to the first sending object is less than The second channel detection time granularity (for example, 34us) of LBT Channel Detection mechanism corresponding to the second sending object is sent, such as This, improves the probability for sending the busy channel of the first sending object, preferentially by way of shortening Channel Detection Time granularity Busy channel carries out data transmission, wherein when for LBT Channel Detection mechanism based on load, Channel Detection Time granularity is extremely It less include initial channel detection time granularity (initial CCA slot) and extended Channel Detection Time granularity (ECCA slot)；(2) by adjusting Channel Detection thresholding, that is to say, that make to send LBT Channel Detection corresponding to the first sending object First Channel Detection thresholding of mechanism is greater than the second channel inspection for the LBT Channel Detection mechanism corresponding to the second sending object that sends Thresholding is surveyed, in this way, the compatibility to channel disturbance can be improved by increasing Channel Detection thresholding, and then improves and sends the first hair Send the probability of the busy channel of object；(3) pass through the LBT Channel Detection mechanism according to corresponding to transmission different sending object Type further refines adjusting parameter information, to improve the probability of the busy channel of the forward sending object of priority rank, into And improve the uplink throughput of LAA system.

In the above-mentioned technical solutions, it is preferable that determining transmission first sending object and second transmission pair As the type of corresponding LBT Channel Detection mechanism, to send first sending object and institute according to type adjustment The parameter information for stating the corresponding LBT Channel Detection mechanism of the second sending object, specifically includes: determining described in transmission When the first sending object and the corresponding LBT Channel Detection mechanism for based on frame structure of second sending object, by sending The repetition period for stating the first Channel Detection Time corresponding to the first sending object, which is adjusted to be less than, sends second transmission pair As the repetition period of corresponding second channel detection time；And first sending object and described second are sent determining When the corresponding LBT Channel Detection mechanism for based on load of sending object, adjustment sends first sending object and described the The parameter information of the corresponding LBT Channel Detection mechanism of two sending objects, comprising: first sending object will be sent First competition window length adjustment of corresponding extended Channel Detection Time is less than transmission the second sending object institute Second competition window length of corresponding extended Channel Detection Time；And/or it will send corresponding to first sending object The extended Channel Detection Time when detecting channel busy the first delay time be adjusted to be less than it is described second send Second delay time of the extended Channel Detection Time corresponding to object when detecting channel busy.

In the technical scheme, when the first sending object of determining transmission and the second sending object are corresponding for based on frame structure (FBE) when LBT Channel Detection mechanism, by adjusting the repetition period of Channel Detection Time, specifically, make to send first and send The repetition period of first Channel Detection Time corresponding to object, which is less than, sends the inspection of second channel corresponding to the second sending object The repetition period for surveying the time increases the number for sending the Channel Detection of the first sending object, Jin Erti that is, within the same time Height sends the probability of the busy channel of the first sending object；And when determining the first sending object and the second sending object is corresponding is When LBT Channel Detection mechanism based on load (LBE), the competition window by adjusting extended Channel Detection Time (ECCA) is long The delay time (defer period) of degree and/or the extended Channel Detection Time when detecting channel busy, specifically, make The the first competition window length (for example, q takes 4) for sending extended Channel Detection Time corresponding to the first sending object is less than hair Send the second competition window length of extended Channel Detection Time corresponding to the second sending object (for example, q takes between 16 to 32 Value) and/or make to send extended Channel Detection Time when detecting channel busy corresponding to the first sending object First delay time (such as 20us) is less than extended when detecting channel busy corresponding to the second sending object of transmission The second delay time (such as 34us) of Channel Detection Time, to improve the probability for the busy channel for sending the first sending object, And then improve the uplink throughput of LAA system.

In the above-mentioned technical solutions, it is preferable that described to determine that sending first sending object and described second sends When the corresponding LBT Channel Detection mechanism for based on load of object, the corresponding extended letter of first sending object will be sent First competition window length adjustment of road detection time is extended channel inspection corresponding less than transmission second sending object The the second competition window length for surveying the time, specifically includes: the first competition window length and second competition window is long Degree is set as fixed competition window length value, and will send extended Channel Detection Time corresponding to first sending object The first competition window length adjustment when being less than extended Channel Detection corresponding to second sending object is sent Between the second competition window length；Or extended Channel Detection Time corresponding to first sending object will be sent The first competition window length be set as fixed competition window length value, and will to send the second sending object institute right The the second competition window length for the extended Channel Detection Time answered is set as variable competition window length value；Or by institute It states the first competition window length and the second competition window length is set as variable competition window length value, and institute will be sent State the first upper confinement boundary of the first competition window length of extended Channel Detection Time corresponding to the first sending object When value and the first lower limit boundary value adjust separately as less than extended Channel Detection corresponding to second sending object is sent Between the second competition window length the second upper confinement boundary value and the second lower limit boundary value, and by first competition window First increasing value of length is adjusted to the second increasing value less than the second competition window length.

In the technical scheme, determining that the first sending object of transmission and the second sending object are corresponding for based on load When LBT Channel Detection mechanism, can be accomplished in several ways makes to send the corresponding extended Channel Detection of the first sending object The first competition window length of time is less than the second competition for sending the corresponding extended Channel Detection Time of the second sending object Length of window is specifically included following several with ensuring the exploitativeness of scheme: (1) by the first competition window length and second When competition window length is set as fixed competition window length value, the first competition window length is directly adjusted to less than the second competition Length of window；(2) and setting fixed competition window length value for the first competition window length that the second competition window is long Degree is set as variable competition window length value, so that the first competition window length is less than the second competition window length；(3) by When one competition window length and the second competition window length are set as variable competition window length value, by making the first competition window It is long that the first upper confinement boundary value and the first lower limit boundary value (i.e. maximum value and minimum value) of length are respectively smaller than the second competition window The the second upper confinement boundary value and the second lower limit boundary value (i.e. maximum value and minimum value) of degree and make the of the first competition window length One increasing value (for example increasing value is less than first competition window length) less than the second competition window length the second increasing value (such as Increasing value and the second competition window equal length, can be doubled and redoubled) so that the first competition window length is less than the second contention window Mouth length；In this way, improving the probability for sending the busy channel of the first sending object, and then improve the uplink throughput of LAA system.

In the above-mentioned technical solutions, it is preferable that first sending object includes: that downlink is sent comprising dispatching uplink The PDCCH/EPDCCH signaling of the authorization instruction of PUSCH or the PUSCH data for sending uplink；Second sending object includes: Send the PDSCH data of downlink.

In the technical scheme, the first sending object preferably includes: including dispatching uplink when down channel is sent The PDCCH/EPDCCH signaling of the authorization instruction of PUSCH or the PUSCH data sent in up channel, and the second sending object is excellent Selection of land includes the PDSCH data sent in down channel, i.e., the priority rank of the PDSCH data sent in down channel is lower than The above two, make down channel send when include dispatching uplink PUSCH authorization instruction PDCCH/EPDCCH signaling and upper The probability of the busy channel for the PUSCH data that row channel is sent is larger, and then improves the uplink throughput of LAA system.

It should be noted that down channel send when include dispatching uplink PUSCH authorization instruction PDCCH/ EPDCCH signaling is mutually independent of each other with the priority of the PUSCH data sent in up channel, as long as guaranteeing the priority of the two Ranking is higher than the PDSCH data sent in down channel.

In the above-mentioned technical solutions, it is preferable that first sending object includes: to send the PUSCH data of uplink, and institute The dispatch for stating the uplink authorization instruction for the PUSCH data for sending uplink is sent out by the PDCCH/EPDCCH of unauthorized frequency range It send；Second sending object includes: to send the PUSCH data of uplink, and the uplink of the PUSCH data for sending uplink is awarded The dispatch of power instruction is sent by the PDCCH/EPDCCH of authorized spectrum band.

In the technical scheme, the first sending object is preferably to send the PUSCH data of uplink, and its uplink authorization refers to The dispatch shown is sent by the PDCCH/EPDCCH of unauthorized frequency range, and the second sending object is preferably to send uplink PUSCH data, and the dispatch of its uplink authorization instruction is sent by the PDCCH/EPDCCH of authorized spectrum band, to improve uplink The dispatch of authorization instruction is the occupancy when the uplink sent on the PDCCH/EPDCCH of unauthorized frequency range sends PUSCH data The probability of up channel, and then LAA system is improved in the uplink throughput of unauthorized frequency range.

The second aspect of the present invention proposes a kind of adjustment system of channel occupancy probabilities, is used for base station, comprising: determines Module, for determining the base station the first sending object and the second sending object to be sent, wherein first sending object Priority be higher than second sending object priority；Judgment module is sending first sending object for judging When whether use LBT Channel Detection mechanism；Control module, for when being determined as no, control to directly transmit described first and sends Object, and LBT Channel Detection mechanism is used when sending second sending object；And adjustment module, for being determined as When being, adjustment sends the ginseng of first sending object and the corresponding LBT Channel Detection mechanism of second sending object Number information, so that the probability for sending the first sending object busy channel, which is greater than, sends the second sending object busy channel Probability.

In the above-mentioned technical solutions, it is preferable that the adjustment module is specifically used for: the first sending object institute will be sent First Channel Detection Time granularity of corresponding LBT Channel Detection mechanism is adjusted to right less than the second sending object institute is sent The second channel detection time granularity for the LBT Channel Detection mechanism answered, wherein when for the LBT Channel Detection mechanism based on load When, the first Channel Detection Time granularity and the second channel detection time granularity include: initial channel detection time grain Degree and extended Channel Detection Time granularity；And/or LBT Channel Detection mechanism corresponding to first sending object will be sent The first Channel Detection thresholding be adjusted to be greater than and send second of LBT Channel Detection mechanism corresponding to second sending object Channel Detection thresholding；And/or it determines and sends first sending object and the corresponding LBT channel of second sending object The type of testing mechanism, with right respectively according to type adjustment transmission first sending object and second sending object The parameter information for the LBT Channel Detection mechanism answered.

In the technical scheme, when the first sending object of transmission and the second sending object are required to carry out LBT Channel Detection When, it can one of in the following manner or a variety of adjustment are sent corresponding to the first sending object and the second sending object The parameter information of LBT Channel Detection mechanism specifically includes: (1) by adjusting Channel Detection Time granularity, that is to say, that is made The the first Channel Detection Time granularity (for example, 20us) for sending LBT Channel Detection mechanism corresponding to the first sending object is less than The second channel detection time granularity (for example, 34us) of LBT Channel Detection mechanism corresponding to the second sending object is sent, such as This, improves the probability for sending the busy channel of the first sending object, preferentially by way of shortening Channel Detection Time granularity Busy channel carries out data transmission, wherein when for LBT Channel Detection mechanism based on load, Channel Detection Time granularity is extremely It less include initial channel detection time granularity (initial CCA slot) and extended Channel Detection Time granularity (ECCAslot)；(2) by adjusting Channel Detection thresholding, that is to say, that make to send LBT channel corresponding to the first sending object First Channel Detection thresholding of testing mechanism is greater than the second letter of the LBT Channel Detection mechanism corresponding to the second sending object that sends Road detection threshold in this way, can be improved the compatibility to channel disturbance by increasing Channel Detection thresholding, and then improves and sends the The probability of the busy channel of one sending object；(3) pass through the LBT Channel Detection machine according to corresponding to transmission different sending object The type of system further refines adjusting parameter information, with improve the forward sending object of priority rank busy channel it is general Rate, and then improve the uplink throughput of LAA system.

In the above-mentioned technical solutions, it is preferable that send first sending object and second sending object determining When the corresponding LBT Channel Detection mechanism for based on frame structure, the adjustment module is specifically used for: will send first transmission The repetition period of first Channel Detection Time corresponding to object is adjusted to be less than and send corresponding to second sending object The repetition period of second channel detection time；And first sending object and second sending object pair are sent determining It answers when being the LBT Channel Detection mechanism based on load, the adjustment module is specifically used for: will send first sending object First competition window length adjustment of corresponding extended Channel Detection Time is less than transmission the second sending object institute Second competition window length of corresponding extended Channel Detection Time；And/or it will send corresponding to first sending object The extended Channel Detection Time when detecting channel busy the first delay time be adjusted to be less than it is described second send Second delay time of the extended Channel Detection Time corresponding to object when detecting channel busy.

In the above-mentioned technical solutions, it is preferable that send first sending object and second sending object determining When the corresponding LBT Channel Detection mechanism for described in based on load, the adjustment module is specifically also used to: described first is competed Length of window and the second competition window length are set as fixed competition window length value, and will send first transmission pair As the first competition window length adjustment of corresponding extended Channel Detection Time is the second transmission described less than transmission The second competition window length of extended Channel Detection Time corresponding to object；Or first transmission pair will be sent As the first competition window length of corresponding extended Channel Detection Time is set as fixed competition window length value, with And the second competition window length for sending extended Channel Detection Time corresponding to second sending object is arranged To can be changed competition window length value；Or set the first competition window length and the second competition window length to can Become competition window length value, and described the of extended Channel Detection Time corresponding to first sending object will be sent First upper confinement boundary value of one competition window length and the first lower limit boundary value adjust separately to send less than transmission described second Under the second upper confinement boundary value and second of the second competition window length of extended Channel Detection Time corresponding to object Boundary value is limited, and the first increasing value of the first competition window length is adjusted to less than the second competition window length Second increasing value.

In the above-mentioned technical solutions, it is preferable that first sending object includes: that downlink is sent including dispatching uplink The PDCCH/EPDCCH signaling of the authorization instruction of PUSCH or the PUSCH data for sending uplink；Second sending object includes: Send the PDSCH data of downlink.

The third aspect of the present invention proposes a kind of base station, comprising: the channel as described in any one of above-mentioned second aspect The adjustment system of acquistion probability, therefore, the base station have and any one of second aspect described in channel occupancy probabilities adjustment The identical technical effect of system, details are not described herein.

According to the technical solution of the present invention, the busy channel of the forward sending object of priority rank can be effectively improved Probability, and then improve LAA system uplink throughput.

Detailed description of the invention

Fig. 1 shows the schematic diagram of two kinds of working methods of unlicensed spectrum；

Fig. 2 shows the schematic diagrames that the interference of Wi-Fi system avoids rule；

Fig. 3 shows the structural schematic diagram of the frame structure based on FBE in the related technology；

Fig. 4 shows the structural schematic diagram of the frame structure based on LBE in the related technology；

Fig. 5 shows the flow diagram of the method for adjustment of channel occupancy probabilities according to an embodiment of the invention；

Fig. 6 shows the block diagram of the adjustment system of channel occupancy probabilities according to an embodiment of the invention；

Fig. 7 shows the block diagram of base station according to an embodiment of the invention.

Specific embodiment

It is with reference to the accompanying drawing and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application Feature in example and embodiment can be combined with each other.

In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below Specific embodiment limitation.

Fig. 5 shows the flow diagram of the method for adjustment of channel occupancy probabilities according to an embodiment of the invention.

As shown in figure 5, the method for adjustment of channel occupancy probabilities according to an embodiment of the invention, is used for base station, packet It includes: step 502, determining the base station the first sending object and the second sending object to be sent, wherein first transmission pair The priority of elephant is higher than the priority of second sending object；Step 504, judge be when sending first sending object It is no to use LBT Channel Detection mechanism, when being determined as no, step 506 is executed, otherwise, when being determined as is, executes step 508； The step 506 directly transmits first sending object, and is examined when sending second sending object using LBT channel Survey mechanism；The step 508, adjustment send first sending object and the corresponding LBT letter of second sending object The parameter information of road testing mechanism, so that the probability for sending the first sending object busy channel, which is greater than, sends second hair Send the probability of object busy channel.

In the above-mentioned technical solutions, it is preferable that the step 508 specifically includes: the first sending object institute will be sent First Channel Detection Time granularity of corresponding LBT Channel Detection mechanism is adjusted to right less than the second sending object institute is sent The second channel detection time granularity for the LBT Channel Detection mechanism answered, wherein when for the LBT Channel Detection mechanism based on load When, the first Channel Detection Time granularity and the second channel detection time granularity include: initial channel detection time grain Degree and extended Channel Detection Time granularity；And/or LBT Channel Detection mechanism corresponding to first sending object will be sent The first Channel Detection thresholding be adjusted to be greater than and send second of LBT Channel Detection mechanism corresponding to second sending object Channel Detection thresholding；And/or it determines and sends first sending object and the corresponding LBT channel of second sending object The type of testing mechanism, with right respectively according to type adjustment transmission first sending object and second sending object The parameter information for the LBT Channel Detection mechanism answered.

In the technical scheme, when the first sending object of transmission and the second sending object are required to carry out LBT Channel Detection When, it can one of in the following manner or a variety of adjustment are sent corresponding to the first sending object and the second sending object The parameter information of LBT Channel Detection mechanism specifically includes: (1) by adjusting Channel Detection Time granularity, that is to say, that is made The the first Channel Detection Time granularity (for example, 20us) for sending LBT Channel Detection mechanism corresponding to the first sending object is less than The second channel detection time granularity (for example, 34us) of LBT Channel Detection mechanism corresponding to the second sending object is sent, such as This, improves the probability for sending the busy channel of the first sending object, preferentially by way of shortening Channel Detection Time granularity Busy channel carries out data transmission, wherein when for LBT Channel Detection mechanism based on load, Channel Detection Time granularity is extremely It less include initial channel detection time granularity (initial CCA slot) and extended Channel Detection Time granularity (ECCA Slot), for example, sending in the LBT Channel Detection mechanism of downlink PDSCH data, initial CCA detection time granularity is The detection time granularity of 34us, extended CCA are 20us, and downlink PDCCH/EPDCCH transmission UL grant (or on sending Capable PUSCH) data LBT Channel Detection mechanism in, initial CCA detection time granularity be 20us, extended CCA Detection time granularity is 9us；(2) by adjusting Channel Detection thresholding, that is to say, that make to send corresponding to the first sending object First Channel Detection thresholding of LBT Channel Detection mechanism, which is greater than, sends LBT Channel Detection mechanism corresponding to the second sending object Second channel detection threshold, in this way, by increase Channel Detection thresholding the compatibility to channel disturbance can be improved, as long as that is, Channel disturbance is not that very greatly, can send the first sending object, and then improve the general of the busy channel for sending the first sending object Rate；(3) by further refining adjustment ginseng according to the type for the LBT Channel Detection mechanism corresponding to different sending objects that sends Number information, to improve the probability of the busy channel of the forward sending object of priority rank, and then the uplink for improving LAA system gulps down The amount of spitting.

In the technical scheme, determining that the first sending object of transmission and the second sending object are corresponding for based on load When LBT Channel Detection mechanism, can be accomplished in several ways makes to send the corresponding extended Channel Detection of the first sending object The first competition window length of time is less than the second competition for sending the corresponding extended Channel Detection Time of the second sending object Length of window is specifically included following several with ensuring the exploitativeness of scheme: (1) by the first competition window length and second When competition window length is set as fixed competition window length value, the first competition window length is directly adjusted to less than the second competition Length of window, even if proper LBT Channel Detection mechanism is based on LBE, the probability of busy channel when random number N takes smaller value Height, for example, for the value for the first competition window length for sending extended Channel Detection Time corresponding to the first sending object 4 are taken, and the value for sending the second competition window length of extended Channel Detection Time corresponding to the second sending object takes 16 to arrive 32, it takes, then can take smaller from 1~q then sending random number N in LBT Channel Detection mechanism corresponding to the first sending object Value, it is meant that need just to send the first sending object when less CCA detection time detects channel idle；(2) pass through Fixed competition window length value is set by the first competition window length and sets variable competition for the second competition window length Length of window value, so that the first competition window length is less than the second competition window length；(3) by the first competition window length and When second competition window length is set as variable competition window length value, by the first upper limit side for making the first competition window length Dividing value and the first lower limit boundary value (i.e. maximum value and minimum value) are respectively smaller than the second upper confinement boundary of the second competition window length Value and the second lower limit boundary value (i.e. maximum value and minimum value) and increase the first increasing value of the first competition window length (such as Be worth less than the first competition window length) less than the second competition window length the second increasing value (such as increasing value with second compete Length of window is equal, can be doubled and redoubled) so that the first competition window length is less than the second competition window length；In this way, improving The probability of the busy channel of the first sending object is sent, and then improves the uplink throughput of LAA system.

Fig. 6 shows the block diagram of the adjustment system of channel occupancy probabilities according to an embodiment of the invention.

As shown in fig. 6, the adjustment system 600 of channel occupancy probabilities according to an embodiment of the invention, is used for base station, Module 602 is comprised determining that, for determining the base station the first sending object and the second sending object to be sent, wherein described The priority of first sending object is higher than the priority of second sending object；Judgment module 604 is sending institute for judging Whether LBT Channel Detection mechanism is used when stating the first sending object；Control module 606, for when being determined as no, control to be direct First sending object is sent, and uses LBT Channel Detection mechanism when sending second sending object；And adjustment mould Block 608, for when being determined as is, adjustment to send first sending object and second sending object is corresponding The parameter information of LBT Channel Detection mechanism, so that the probability for sending the first sending object busy channel is greater than described in transmission The probability of second sending object busy channel.

In the above-mentioned technical solutions, it is preferable that the adjustment module 608 is specifically used for: first transmission pair will be sent Second sending object is sent as the first Channel Detection Time granularity of corresponding LBT Channel Detection mechanism is adjusted to be less than The second channel detection time granularity of corresponding LBT Channel Detection mechanism, wherein when for the LBT Channel Detection based on load When mechanism, when the first Channel Detection Time granularity and the second channel detection time granularity include: initial channel detection Between granularity and extended Channel Detection Time granularity；And/or LBT Channel Detection corresponding to first sending object will be sent First Channel Detection thresholding of mechanism, which is adjusted to be greater than, sends LBT Channel Detection mechanism corresponding to second sending object Second channel detection threshold；And/or it determines and sends first sending object and the corresponding LBT of second sending object The type of Channel Detection mechanism sends first sending object and second sending object point to adjust according to the type The parameter information of not corresponding LBT Channel Detection mechanism.

In the above-mentioned technical solutions, it is preferable that send first sending object and second sending object determining When the corresponding LBT Channel Detection mechanism for based on frame structure, the adjustment module 608 is specifically used for: will send described first The repetition period of first Channel Detection Time corresponding to sending object is adjusted to right less than the second sending object institute is sent The repetition period for the second channel detection time answered；And first sending object and second transmission pair are sent determining When as the corresponding LBT Channel Detection mechanism for based on load, the adjustment module 608 is specifically used for: will send described first First competition window length adjustment of extended Channel Detection Time corresponding to sending object is the second hair described less than transmission Send the second competition window length of extended Channel Detection Time corresponding to object；And/or first transmission pair will be sent As the first delay time of the corresponding extended Channel Detection Time when detecting channel busy is adjusted to less than described Second delay time of the extended Channel Detection Time corresponding to the second sending object when detecting channel busy.

In the above-mentioned technical solutions, it is preferable that send first sending object and second sending object determining When the corresponding LBT Channel Detection mechanism for described in based on load, the adjustment module specific 608 is used for: competing by described first It strives length of window and the second competition window length is set as fixed competition window length value, and described first will be sent and sent The first competition window length adjustment of extended Channel Detection Time corresponding to object is the second hair described less than transmission Send the second competition window length of extended Channel Detection Time corresponding to object；Or described first will be sent and sent The first competition window length of extended Channel Detection Time corresponding to object is set as fixed competition window length value, And the second competition window length for sending extended Channel Detection Time corresponding to second sending object is set It is set to variable competition window length value；Or it sets the first competition window length and the second competition window length to Variable competition window length value, and will send described in extended Channel Detection Time corresponding to first sending object First upper confinement boundary value of the first competition window length and the first lower limit boundary value adjust separately as less than transmission second hair Send the second upper confinement boundary value and second of the second competition window length of extended Channel Detection Time corresponding to object Lower limit boundary value, and the first increasing value of the first competition window length is adjusted to be less than the second competition window length The second increasing value.

In the technical scheme, determining that the first sending object of transmission and the second sending object are corresponding for based on load When LBT Channel Detection mechanism, can be accomplished in several ways makes to send the corresponding extended Channel Detection of the first sending object The first competition window length of time is less than the second competition for sending the corresponding extended Channel Detection Time of the second sending object Length of window is specifically included following several with ensuring the exploitativeness of scheme: (1) by the first competition window length and second When competition window length is set as fixed competition window length value, the first competition window length is directly adjusted to less than the second competition Length of window, even if proper LBT Channel Detection mechanism is based on LBE, the probability of busy channel when random number N takes smaller value Height, for example, for the value for the first competition window length for sending extended Channel Detection Time corresponding to the first sending object 4 are taken, and the value for sending the second competition window length of extended Channel Detection Time corresponding to the second sending object takes 16 to arrive 32, it takes, then can take smaller from 1~q then sending random number N in LBT Channel Detection mechanism corresponding to the first sending object Value, it is meant that need just to send the first sending object when less CCA detection time detects channel idle；(2) pass through Fixed competition window length value is set by the first competition window length and sets variable competition for the second competition window length Length of window value, so that the first competition window length is less than the second competition window length；(3) by the first competition window length and When second competition window length is set as variable competition window length value, by the first upper limit side for making the first competition window length Dividing value and the first lower limit boundary value (i.e. maximum value and minimum value) are respectively smaller than the second upper confinement boundary of the second competition window length Value and the second lower limit boundary value (i.e. maximum value and minimum value) and increase the first increasing value of the first competition window length (such as Value is less than the first competition window length) less than the second increasing value of the second competition window length (such as increasing value be equal to it is second competing Length of window is striven, can be doubled and redoubled) so that the first competition window length is less than the second competition window length；In this way, improving hair The probability of the busy channel of the first sending object is sent, and then improves the uplink throughput of LAA system.

As shown in fig. 7, base station 700 according to an embodiment of the invention, comprising: such as any one of above-mentioned second aspect The adjustment system 600 of the channel occupancy probabilities, therefore, the base station 700 have and any one of second aspect described in letter The identical technical effect of adjustment system 600 of road acquistion probability, details are not described herein.

The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, and according to the difference of base station sending object, setting is not Same LBT Channel Detection mechanism or parameter, the preferential busy channel of the sending object for keeping priority rank forward, it can have Effect ground improves the probability of the busy channel of the forward sending object of priority rank, and then improves the uplink throughput of LAA system.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of method of adjustment of channel occupancy probabilities is used for base station characterized by comprising

Determine the base station the first sending object and the second sending object to be sent, wherein first sending object it is excellent First grade is higher than the priority of second sending object；

Judge LBT Channel Detection mechanism whether is used when sending first sending object；

When being determined as no, first sending object is directly transmitted, and believe using LBT when sending second sending object Road testing mechanism；

When being determined as is, adjustment sends first sending object and the corresponding LBT channel of second sending object The parameter information of testing mechanism, so that the probability for sending the first sending object busy channel, which is greater than, sends second transmission The probability of object busy channel；

Wherein, described when being determined as is, adjustment sends first sending object and second sending object respectively corresponds LBT Channel Detection mechanism parameter information so that the probability for sending the first sending object busy channel, which is greater than, sends institute The probability for stating the second sending object busy channel, specifically includes:

First Channel Detection thresholding of the LBT Channel Detection mechanism corresponding to first sending object that sends is adjusted to be greater than Send the second channel detection threshold of LBT Channel Detection mechanism corresponding to second sending object.

2. the method for adjustment of channel occupancy probabilities according to claim 1, which is characterized in that it is described when being determined as is, Adjustment sends first sending object and described second and sends to described when being determined as is, adjustment sends described first and sends The parameter information of object and the corresponding LBT Channel Detection mechanism of second sending object, so as to send first hair The probability of object busy channel is sent to be greater than the probability for sending the second sending object busy channel, further includes:

First Channel Detection Time granularity of the LBT Channel Detection mechanism corresponding to first sending object that sends is adjusted to Less than the second channel detection time granularity for sending LBT Channel Detection mechanism corresponding to second sending object, wherein when When for LBT Channel Detection mechanism based on load, the first Channel Detection Time granularity and the second channel detection time Granularity includes: initial channel detection time granularity and extended Channel Detection Time granularity；And/or

Determine the class for sending first sending object and the corresponding LBT Channel Detection mechanism of second sending object Type sends first sending object and the corresponding LBT channel of second sending object to adjust according to the type The parameter information of testing mechanism.

3. the method for adjustment of channel occupancy probabilities according to claim 2, which is characterized in that described determining to send described the The type of one sending object and the corresponding LBT Channel Detection mechanism of second sending object, according to the type tune It haircuts and the parameter of first sending object and the corresponding LBT Channel Detection mechanism of second sending object is sent to believe Breath, specifically includes:

Determining that transmission first sending object and second sending object are corresponding for the LBT channel inspection based on frame structure When survey mechanism, the repetition period for sending the first Channel Detection Time corresponding to first sending object is adjusted to be less than hair Send the repetition period of second channel detection time corresponding to second sending object；And

Determining that transmission first sending object and second sending object are corresponding for the LBT Channel Detection based on load When mechanism, adjustment sends first sending object and the corresponding LBT Channel Detection mechanism of second sending object The parameter information, comprising:

It is by the first competition window length adjustment for sending extended Channel Detection Time corresponding to first sending object Less than the second competition window length for sending extended Channel Detection Time corresponding to second sending object；And/or

Of extended Channel Detection Time corresponding to first sending object when detecting channel busy will be sent One delay time was adjusted to be less than the extended channel inspection corresponding to second sending object when detecting channel busy Survey the second delay time of time.

4. the method for adjustment of channel occupancy probabilities according to claim 3, which is characterized in that described to determine described in transmission It, will be described in transmission when the first sending object and the corresponding LBT Channel Detection mechanism for based on load of second sending object First competition window length adjustment of the corresponding extended Channel Detection Time of the first sending object is less than transmission described second Second competition window length of the corresponding extended Channel Detection Time of sending object, specifically includes:

Fixed competition window length value is set by the first competition window length and the second competition window length, and will It is small for sending the first competition window length adjustment of extended Channel Detection Time corresponding to first sending object In the second competition window length for sending extended Channel Detection Time corresponding to second sending object；Or

The the first competition window length for sending extended Channel Detection Time corresponding to first sending object is set It is set to fixed competition window length value, and extended Channel Detection Time corresponding to second sending object will be sent The second competition window length is set as variable competition window length value；Or

Variable competition window length value is set by the first competition window length and the second competition window length, and The first of the first competition window length of extended Channel Detection Time corresponding to first sending object will be sent Upper confinement boundary value and the first lower limit boundary value adjust separately as less than extended letter corresponding to transmission second sending object The the second upper confinement boundary value and the second lower limit boundary value of the second competition window length of road detection time, and by described first First increasing value of competition window length is adjusted to the second increasing value less than the second competition window length.

5. the method for adjustment of channel occupancy probabilities according to any one of claim 1 to 4, which is characterized in that

First sending object includes: the PDCCH/EPDCCH letter that downlink sends the authorization instruction comprising dispatching uplink PUSCH Enable or send the PUSCH data of uplink；

Second sending object includes: to send the PDSCH data of downlink.

6. the method for adjustment of channel occupancy probabilities according to any one of claim 1 to 4, which is characterized in that

First sending object include: send uplink PUSCH data, and it is described send uplink PUSCH data uplink The dispatch of instruction is authorized to send by the PDCCH/EPDCCH of unauthorized frequency range；

Second sending object include: send uplink PUSCH data, and it is described send uplink PUSCH data uplink The dispatch of authorization instruction is sent by the PDCCH/EPDCCH of authorized spectrum band.

7. a kind of adjustment system of channel occupancy probabilities is used for base station characterized by comprising

Determining module, for determining the base station the first sending object and the second sending object to be sent, wherein described first The priority of sending object is higher than the priority of second sending object；

Judgment module, for judging whether use LBT Channel Detection mechanism when sending first sending object；

Control module, for when being determined as no, control to directly transmit first sending object, and is sending second hair LBT Channel Detection mechanism is used when sending object；And

Module is adjusted, for when being determined as is, adjustment to send first sending object and second sending object difference The parameter information of corresponding LBT Channel Detection mechanism, so that the probability for sending the first sending object busy channel is greater than hair Send the probability of the second sending object busy channel；

The adjustment module is specifically used for:

8. the adjustment system of channel occupancy probabilities according to claim 7, which is characterized in that the adjustment module is also used In:

9. the adjustment system of channel occupancy probabilities according to claim 8, which is characterized in that

Determining that transmission first sending object and second sending object are corresponding for the LBT channel inspection based on frame structure When survey mechanism, the adjustment module is specifically used for: will send the first Channel Detection Time corresponding to first sending object Repetition period be adjusted to be less than the repetition period for sending second channel detection time corresponding to second sending object；With And

Determining that transmission first sending object and second sending object are corresponding for the LBT Channel Detection based on load When mechanism, the adjustment module is specifically used for:

10. the adjustment system of channel occupancy probabilities according to claim 9, which is characterized in that send described the determining When one sending object and the corresponding LBT Channel Detection mechanism to be described based on load of second sending object, the adjustment Module is specifically also used to:

11. the adjustment system of channel occupancy probabilities according to any one of claims 7 to 10, which is characterized in that

First sending object includes: the PDCCH/EPDCCH letter that downlink sends the authorization instruction including dispatching uplink PUSCH Enable or send the PUSCH data of uplink；

Second sending object includes: to send the PDSCH data of downlink.

12. the adjustment system of channel occupancy probabilities according to any one of claims 7 to 10, which is characterized in that

13. a kind of base station characterized by comprising the tune of the channel occupancy probabilities as described in any one of claim 7 to 12 Whole system.