CN104994591A

CN104994591A - Adjustment method, adjustment system of channel acquisition probability and base station

Info

Publication number: CN104994591A
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: 2015-10-21
Anticipated expiration: 2035-07-08
Also published as: CN104994591B; WO2017004901A1

Abstract

The invention presents an adjustment method of channel acquisition probability, an adjustment system of the channel acquisition probability and a base station. The adjustment method of the channel acquisition probability comprises the steps as follows: determining a first transmitting object and a second transmitting object to be transmitted by the base station, wherein the priority of the first transmitting object is more than that of the second transmitting object; judging whether an LBT channel detecting mechanism is used while transmitting the first transmitting object; directly transmitting the first transmitting object while the LBT channel detecting mechanism is not used, and using the LBT channel detecting mechanism while transmitting the second transmitting object; adjusting parameter information of the LBT channel detecting mechanism respectively corresponding to the first transmitting object and the second transmitting object so that the probability that the first transmitting object occupies the channel is more than that of the second transmitting object. According to the technical solution, the method and the system of the invention could effectively improve the probability that the transmitting object whose priority ranked front occupies the channel so as to improve uplink throughput capacity of an LAA system.

Description

The method of adjustment of channel occupancy probabilities, adjustment System and base station

Technical field

The present invention relates to communication technical field, in particular to adjustment System and a kind of base station of a kind of method of adjustment of channel occupancy probabilities, a kind of channel occupancy probabilities.

Background technology

Along with the sharply increase of message volume, 3GPP (The 3 ^rdgeneration PartnershipProject, 3G (Third Generation) Moblie partnership) mandate frequency spectrum be more and more not enough to provide higher network capacity.In order to improve the utilance of frequency spectrum resource further, 3GPP is just discussing how under the help of authorizing frequency spectrum, to use unlicensed spectrum, as 2.4GHz and 5GHz frequency range.The systems such as these unlicensed spectrums current mainly Wi-Fi, bluetooth, radar, medical treatment are in use.

Under normal circumstances, the access technology designed for authorizing frequency range, as LTE (Long TermEvolution, Long Term Evolution) is not suitable for using in unauthorized frequency range, because the requirement that this kind of access technology of LTE is optimized spectrum efficiency and Consumer's Experience is very high.But carrier aggregation (CarrierAggregation, CA) function allows and LTE is deployed in unauthorized frequency range becomes possibility.3GPP proposes the concept of LAA (the auxiliary access of LTE Assisted Access, LTE), authorizes the help of frequency spectrum to use unlicensed spectrum by LTE.And unlicensed spectrum can have two kinds of working methods, one is supplementary descending (SDL, Supplemental Downlink), namely only has downlink transfer subframe; Another kind is tdd mode, has both comprised descending sub frame, sub-frame of uplink.Supplementing descending this situation can only be use by carrier aggregation technology.And tdd mode is except can using by carrier aggregation technology, can also uses by DC (Dual Connectivity, doubly-linked leads to), also can independently use.As shown in Figure 1.

Compared to Wi-Fi system, the LTE system being operated in unauthorized frequency range has the ability to provide higher spectrum efficiency and larger coverage effect, allows data traffic authorize seamless switching between frequency range and unauthorized frequency range based on same core net simultaneously.Concerning user, this means better broadband experience, higher speed, better stability and mobile facility.

The existing access technology used in unlicensed spectrum, as Wi-Fi, has more weak antijamming capability.In order to avoid interference, rule is avoided in a lot of interference of Wi-Fi system, as CSMA/CD (Carrier Sense Multiple Access/Collision Detection, csma/collision detection method), the general principle of this method is the AP (AccessPoint of Wi-Fi, access point) or terminal transmission signaling or data before, want whether have other AP or other-end around first Monitor detection in sending/receiving signaling or data, if have, then continue to monitor, do not have until listen to; If no, then generate a random number as back off time, in this back off time, if signaling or transfer of data do not detected, so after back off time terminates, AP or terminal can start to send signaling or data.This process as shown in Figure 2.

But, owing to there being good orthogonality to ensure that interference level in LTE network, so the downstream transmission of base station and user need not consider whether have other base stations or other users transmitting data around.If whether have other equipment around also not considering when LTE uses in unauthorized frequency range in the unauthorized frequency range of use, so great interference will be brought to Wi-Fi equipment.As long as because LTE has business just to transmit, without any monitoring rule, so Wi-Fi equipment just can not be transmitted when LTE has business to transmit, can only wait until that LTE business is transmitted, just can detect that channel clear is to carry out transfer of data.

So LTE is when using unauthorized frequency range, one of topmost key point guarantees that LAA (access technology that LTE assisted access, LTE are auxiliary) can coexist with existing access technology (such as Wi-Fi) on fair friendly basis.And in traditional LTE system, do not have the mechanism of LBT (Listen Before Talk, listem-before-talk) to carry out collision free.In order to better coexist with Wi-Fi, LTE needs a kind of LBT mechanism.Like this, if LTE detects channel busy in unlicensed spectrum, then can not take this frequency range, if detect that channel is not busy, just can take.

Based on the problems referred to above, at present, propose a kind of (FBE based on frame structure, Frame basedequipment) LBT mechanism (as shown in Figure 3), left oblique line is CCA (Clear ChannelAssessment, clear channel assessment (CCA)) Channel Detection Time, CCA periodicity detection time repeats, if channel idle detected, then busy channel, after Channel holding time reaches maximum channel holding time, there is idle (free time) time, in the idle time, sending point does not send signal and data, so that channel is seized in other sending point.After the idle time, occur again CCA detection time, if channel busy detected, then not busy channel, until again detect channel when the CCA in next cycle occurs detection time.Certainly, Channel Detection Time also belongs to the idle time, and idle duration must be greater than 5% of the maximum holding time of channel.The idle time adds channel occupancy maximum time and cycle.

At present, also proposed the LBT mechanism of a kind of (LBE, Load based equipment) based on load, be illustrated in fig. 4 shown below: the LBT mechanism based on LBE is aperiodic, as long as business arrives, then trigger CCA and detect, if CCA detects the free time, then send signaling or data at once; If channel busy detected, then get a random number N, the span of N is 1 to q (i.e. competition window length), and the span of q is 4 to 32.Fig. 4 shows the situation of q=16, and now, when channel idle being detected, the maximum holding time of channel is (13/32) x q=6.5ms.After 6.5ms, taking extended CCA (Channel Detection Time of prolongation) mechanism, is namely also random value N, the scope of N is 1 to 16, if value is 8, then represent that each CCA will detect channel detection time in ensuing continuous print CCA detection time, if channel idle detected, then N-1, if channel busy detected, then N is constant, when N is 0, send signaling or data.

In addition, in order to further keep fairness with Wi-Fi, LBE takes different initialCCA (initial channel detection time) and extended CCA (ECCA, extend Channel Detection Time) value, such as first time CCA detection, be initial CCA, this time granularity is larger, such as 34us; When detecting that the time granularity of the ECCA after channel busy or Channel holding time cut-off is smaller, such as 9us.In addition, in Channel Detection, if channel busy detected, then to increase a defer period (time of delay), the value of this defer period is suitable with the value of initial CCA, that is again channel idle must be detected for a long time, could continue N-1.

And for up PUSCH (the Physical Uplink Shared Channel in LAA, Physical Uplink Shared Channel) transmission, there are two kinds of situations: the first situation is, the UL grant (uplink authorization instruction) of the PUSCH resource of scheduling LAA is by PDCCH (the Physical Downlink Control Channel in unlicensed spectrum, Physical Downlink Control Channel) or EPDCCH (Enhanced Physical Downlink Control Channel, the Physical Downlink Control Channel strengthened) send, in this case, eNB (base station) is when sending UL grant, first to be descending LBT to detect, namely eNB is first descending LBT and detects, send UL grant again, UE (terminal) after receiving UL grant, then carries out up LBT detection, then sends PUSCH, makes the more difficult transmission of UL PUSCH, the second situation is, the ULgrant of the PUSCH resource of scheduling LAA is sent by PDCCH or EPDCCH authorized on frequency spectrum, in this case, eNB, when sending UL grant, because be send on mandate frequency spectrum, detects so need not carry out descending LBT, at the UE be scheduled after receiving UL grant, carry out up LBT to detect, and then send PUSCH, make the easy transmission of PUSCH.

Therefore, the uplink throughput performance how improving LAA system becomes problem demanding prompt solution.

Summary of the invention

The present invention is just based on the problems referred to above, propose a kind of new technical scheme, according to the difference of base station sending object, different LBT Channel Detection mechanism or parameter are set, the sending object making priority rank forward can preferential busy channel, namely effectively can improve the probability of the busy channel of the forward sending object of priority rank, and then improve the uplink throughput performance of LAA system.

In view of this, a first aspect of the present invention, propose a kind of method of adjustment of channel occupancy probabilities, for base station, comprise: determine the first sending object that described base station is to be sent and the second sending object, wherein, the priority of described first sending object is higher than the priority of described second sending object; Judge whether use LBT Channel Detection mechanism when sending described first sending object; When being judged to be no, directly send described first sending object, and use LBT Channel Detection mechanism when sending described second sending object; When being judged to be, adjustment sends the parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, is greater than to make the probability of the described first sending object busy channel of transmission the probability sending described second sending object busy channel.

In this technical scheme, different LBT Channel Detection mechanism or the parameter information of LBT Channel Detection mechanism are arranged to the different sending objects of base station, to seize the probability of channel according to priority difference, namely the probability of the busy channel of the forward sending object of priority rank is improved, particularly, first sending object forward for priority rank directly can send without the need to carrying out LBT Channel Detection, and LBT Channel Detection must be carried out before transmitting for priority rank the second sending object rearward, so, obviously the probability of the first sending object busy channel can be improved, and then improve the uplink throughput of LAA system, in addition, if all need to carry out LBT Channel Detection in transmission first sending object and the second sending object, the parameter information of the different LBT Channel Detection mechanism corresponding to object then can be sent by adjustment, to reach the object of the probability of the busy channel improving the forward sending object of priority rank, and then improve the uplink throughput of LAA system.

In technique scheme, preferably, described when being judged to be, adjustment sends the parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, the probability sending described second sending object busy channel is greater than to make the probability of the described first sending object busy channel of transmission, specifically comprise: the first Channel Detection Time granularity of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to second channel granularity detection time being less than the LBT Channel Detection mechanism sent corresponding to described second sending object, wherein, when for based on load LBT Channel Detection mechanism time, described first Channel Detection Time granularity and described second channel granularity detection time comprise: the Channel Detection Time granularity of initial channel granularity detection time and prolongation, and/or the first Channel Detection thresholding of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to the second channel detection threshold being greater than the LBT Channel Detection mechanism sent corresponding to described second sending object, and/or determine to send the type of described first sending object and the respectively corresponding LBT Channel Detection mechanism of described second sending object, to send the described parameter information of described first sending object and the corresponding respectively LBT Channel Detection mechanism of described second sending object according to described type adjustment.

In this technical scheme, when transmission first sending object and the second sending object all need to carry out LBT Channel Detection, can in the following manner in one or more adjustment transmission first sending objects and the parameter informations of the LBT Channel Detection mechanism corresponding to the second sending object, comprise particularly: (1) is by adjustment Channel Detection Time granularity, that is, make the first Channel Detection Time granularity of the LBT Channel Detection mechanism corresponding to transmission first sending object (such as, 20us) be less than second channel granularity detection time of the LBT Channel Detection mechanism corresponding to transmission second sending object (such as, 34us), so, the probability of the busy channel of transmission first sending object is improved by the mode shortening Channel Detection Time granularity, preferentially busy channel carries out transfer of data, wherein, when for based on load LBT Channel Detection mechanism time, the Channel Detection Time granularity (ECCAslot) that Channel Detection Time granularity at least comprises initial channel granularity detection time (initial CCA slot) and extends, (2) by adjustment Channel Detection thresholding, that is, the first Channel Detection thresholding of the LBT Channel Detection mechanism corresponding to transmission first sending object is made to be greater than the second channel detection threshold of the LBT Channel Detection mechanism corresponding to transmission second sending object, so, the compatibility to channel disturbance can be improved by increase Channel Detection thresholding, and then the probability of the busy channel of raising transmission first sending object, (3) by adjusting parameter information according to the further refinement of the type of the LBT Channel Detection mechanism sent corresponding to different sending objects, to improve the probability of the busy channel of the forward sending object of priority rank, and then improve the uplink throughput of LAA system.

In technique scheme, preferably, the described type determining the LBT Channel Detection mechanism sending described first sending object and described second sending object difference correspondence, to send the described parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence according to described type adjustment, specifically comprise: determine send described first sending object and described second sending object corresponding for based on frame structure LBT Channel Detection mechanism time, is adjusted to the repetition period being less than the second channel detection time sent corresponding to described second sending object the repetition period of the first Channel Detection Time sent corresponding to described first sending object, and determine send described first sending object and described second sending object corresponding for based on load LBT Channel Detection mechanism time, adjustment sends the described parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, comprising: by the first competition window length adjustment of the Channel Detection Time of the prolongation sent corresponding to described first sending object for being less than the second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object, and/or by second time of delay being adjusted to the Channel Detection Time of the prolongation when channel busy being detected be less than corresponding to described second sending object the first time of delay of the Channel Detection Time of the prolongation when channel busy being detected corresponding to described first sending object of transmission.

In this technical scheme, when determine transmission first sending object and the second sending object corresponding for based on frame structure (FBE) LBT Channel Detection mechanism time, by adjusting the repetition period of Channel Detection Time, particularly, the repetition period of the first Channel Detection Time corresponding to transmission first sending object is made to be less than the repetition period of the second channel detection time corresponding to transmission second sending object, namely within the same time, increase the number of times of the Channel Detection of transmission first sending object, and then the probability of the busy channel of raising transmission first sending object; and when determine the first sending object and the second sending object corresponding for based on load (LBE) LBT Channel Detection mechanism time, the time of delay (defer period) of the Channel Detection Time of the competition window length of the Channel Detection Time (ECCA) extended by adjustment and/or the prolongation when detecting channel busy, particularly, make the first competition window length of the Channel Detection Time of the prolongation corresponding to transmission first sending object (such as, q gets 4) be less than the second competition window length of the Channel Detection Time of the prolongation corresponding to transmission second sending object (such as, q gets the value between 16 to 32) and/or make second time of delay (such as 34us) being less than the Channel Detection Time of the prolongation when channel busy being detected corresponding to transmission second sending object the first time of delay (such as 20us) of the Channel Detection Time of the prolongation when channel busy being detected corresponding to transmission first sending object, to improve the probability of the busy channel of transmission first sending object, and then improve the uplink throughput of LAA system.

In technique scheme, preferably, described determine send described first sending object and described second sending object corresponding for based on load LBT Channel Detection mechanism time, be the second competition window length being less than the Channel Detection Time sending prolongation corresponding to described second sending object by the first competition window length adjustment sending the Channel Detection Time of prolongation corresponding to described first sending object, specifically comprise: described first competition window length and described second competition window length are set to fixing competition window length value, and by the described first competition window length adjustment of the Channel Detection Time of the prolongation sent corresponding to described first sending object for being less than the described second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object, or the described first competition window length of the Channel Detection Time of the prolongation sent corresponding to described first sending object is set to fixing competition window length value, and the described second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object is set to variable competition window length value, or described first competition window length and described second competition window length are set to variable competition window length value, and the first upper confinement boundary value of the described first competition window length of the Channel Detection Time of the prolongation corresponding to described first sending object of transmission and the first lower limit boundary value are adjusted to respectively the second upper confinement boundary value and the second lower limit boundary value of the described second competition window length of the Channel Detection Time being less than the prolongation sent corresponding to described second sending object, and the first increasing value of described first competition window length is adjusted to the second increasing value being less than described second competition window length.

In this technical scheme, determine transmission first sending object and the second sending object corresponding for based on load LBT Channel Detection mechanism time, the the second competition window length making the first competition window length of the Channel Detection Time of prolongation corresponding to transmission first sending object be less than the Channel Detection Time of prolongation corresponding to transmission second sending object can be accomplished in several ways, to guarantee the exploitativeness of scheme, specifically comprise following several: (1) is when being set to fixing competition window length value by the first competition window length and the second competition window length, directly be adjusted to the first competition window length and be less than the second competition window length, (2) the second competition window length is set to variable competition window length value by the first competition window length is set to fixing competition window length value, is less than the second competition window length to make the first competition window length, (3) when the first competition window length and the second competition window length are set to variable competition window length value, be less than the second upper confinement boundary value of the second competition window length and the second lower limit boundary value (i.e. maximum and minimum value) respectively by making the first upper confinement boundary value of the first competition window length and the first lower limit boundary value (i.e. maximum and minimum value) and make the first increasing value of the first competition window length (such as increasing value is less than the first competition window length) be less than the second increasing value of the second competition window length (such as increasing value is equal with the second competition window length, can be doubled and redoubled), the second competition window length is less than to make the first competition window length, so, improve the probability of the busy channel of transmission first sending object, and then improve the uplink throughput of LAA system.

In technique scheme, preferably, described first sending object comprises: descending transmission comprises the PDCCH/EPDCCH signaling of the mandate instruction of dispatching uplink PUSCH or sends up PUSCH data; Described second sending object comprises: send descending PDSCH data.

In this technical scheme, first sending object preferably includes: the PDCCH/EPDCCH signaling comprising the mandate instruction of dispatching uplink PUSCH when down channel sends or the PUSCH data sent at up channel, and the second sending object is preferably incorporated in the PDSCH data that down channel sends, namely the priority rank of PDSCH data sent at down channel is lower than the above two, the PDCCH/EPDCCH signaling making to comprise when down channel sends the mandate instruction of dispatching uplink PUSCH and the probability of the busy channel of PUSCH data sent at up channel larger, and then improve the uplink throughput of LAA system.

It should be noted that, the PDCCH/EPDCCH signaling comprising the mandate instruction of dispatching uplink PUSCH when down channel sends is independent of each other mutually with the priority of the PUSCH data sent at up channel, as long as the priority rank both ensureing is higher than the PDSCH data sent at down channel.

In technique scheme, preferably, described first sending object comprises: send up PUSCH data, and the dispatch of the uplink authorization instruction of the up PUSCH data of described transmission is sent by the PDCCH/EPDCCH of unauthorized frequency range; Described second sending object comprises: send up PUSCH data, and the dispatch of the uplink authorization instruction of the up PUSCH data of described transmission sends by authorizing the PDCCH/EPDCCH of frequency range.

In this technical scheme, first sending object is preferably and sends up PUSCH data, and the dispatch of its uplink authorization instruction is sent by the PDCCH/EPDCCH of unauthorized frequency range, and the second sending object is preferably the up PUSCH data of transmission, and the dispatch of its uplink authorization instruction sends by authorizing the PDCCH/EPDCCH of frequency range, to improve the probability taking up channel when the dispatch of uplink authorization instruction is the up transmission PUSCH data sent on the PDCCH/EPDCCH of unauthorized frequency range, and then improve the uplink throughput of LAA system in unauthorized frequency range.

A second aspect of the present invention, propose a kind of adjustment System of channel occupancy probabilities, for base station, comprise: determination module, for determining the first sending object that described base station is to be sent and the second sending object, wherein, the priority of described first sending object is higher than the priority of described second sending object; Whether judge module, use LBT Channel Detection mechanism for judging when sending described first sending object; Control module, for when being judged to be no, controlling directly to send described first sending object, and using LBT Channel Detection mechanism when sending described second sending object; And adjusting module, for when being judged to be, adjustment sends the parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, is greater than to make the probability of the described first sending object busy channel of transmission the probability sending described second sending object busy channel.

In technique scheme, preferably, described adjusting module specifically for: the first Channel Detection Time granularity of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to second channel granularity detection time being less than the LBT Channel Detection mechanism sent corresponding to described second sending object, wherein, when for based on load LBT Channel Detection mechanism time, described first Channel Detection Time granularity and described second channel granularity detection time comprise: the Channel Detection Time granularity of initial channel granularity detection time and prolongation; And/or the first Channel Detection thresholding of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to the second channel detection threshold being greater than the LBT Channel Detection mechanism sent corresponding to described second sending object; And/or determine to send the type of described first sending object and the respectively corresponding LBT Channel Detection mechanism of described second sending object, to send the described parameter information of described first sending object and the corresponding respectively LBT Channel Detection mechanism of described second sending object according to described type adjustment.

In technique scheme, preferably, determine to send described first sending object and described second sending object corresponding for LBT Channel Detection mechanism based on frame structure time, described adjusting module specifically for: is adjusted to the repetition period being less than the second channel detection time sent corresponding to described second sending object the repetition period of the first Channel Detection Time sent corresponding to described first sending object; And determine to send described first sending object and described second sending object corresponding for LBT Channel Detection mechanism based on load time, described adjusting module specifically for: by the first competition window length adjustment of the Channel Detection Time of the prolongation sent corresponding to described first sending object for being less than the second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object; And/or by second time of delay being adjusted to the Channel Detection Time of the prolongation when channel busy being detected be less than corresponding to described second sending object the first time of delay of the Channel Detection Time of the prolongation when channel busy being detected corresponding to described first sending object of transmission.

In technique scheme, preferably, determine to send described first sending object and described second sending object corresponding for the described LBT Channel Detection based on load mechanism time, described adjusting module concrete also for: described first competition window length and described second competition window length are set to fixing competition window length value, and by the described first competition window length adjustment of the Channel Detection Time of the prolongation sent corresponding to described first sending object for being less than the described second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object, or the described first competition window length of the Channel Detection Time of the prolongation sent corresponding to described first sending object is set to fixing competition window length value, and the described second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object is set to variable competition window length value, or described first competition window length and described second competition window length are set to variable competition window length value, and the first upper confinement boundary value of the described first competition window length of the Channel Detection Time of the prolongation corresponding to described first sending object of transmission and the first lower limit boundary value are adjusted to respectively the second upper confinement boundary value and the second lower limit boundary value of the described second competition window length of the Channel Detection Time being less than the prolongation sent corresponding to described second sending object, and the first increasing value of described first competition window length is adjusted to the second increasing value being less than described second competition window length.

In this technical scheme, first sending object is preferably and sends up PUSCH data, and the dispatch of its uplink authorization instruction is sent by the PDCCH/EPDCCH of unauthorized frequency range, and the second sending object is preferably the up PUSCH data of transmission, and the dispatch of its uplink authorization instruction sends by authorizing the PDCCH/EPDCCH of frequency range, to improve the probability taking up channel when the dispatch of uplink authorization instruction is the up transmission PUSCH data sent on the PDCCH/EPDCCH of unauthorized frequency range, , and then improve the uplink throughput of LAA system in unauthorized frequency range.

A third aspect of the present invention, propose a kind of base station, comprising: the adjustment System of the channel occupancy probabilities according to any one of above-mentioned second aspect, therefore, this base station has the technique effect identical with the adjustment System of the channel occupancy probabilities according to any one of second aspect, does not repeat them here.

By technical scheme of the present invention, effectively can improve the probability of the busy channel of the forward sending object of priority rank, and then improve the uplink throughput of LAA system.

Accompanying drawing explanation

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

Regular schematic diagram is avoided in the interference that Fig. 2 shows Wi-Fi system;

Fig. 3 shows the structural representation based on the frame structure of FBE in correlation technique;

Fig. 4 shows the structural representation based on the frame structure of LBE in correlation technique;

Fig. 5 shows the schematic flow sheet 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.

Embodiment

In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.

Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.

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

As shown in Figure 5, the method of adjustment of channel occupancy probabilities according to an embodiment of the invention, for base station, comprise: step 502, determine the first sending object that described base station is to be sent and the second sending object, wherein, the priority of described first sending object is higher than the priority of described second sending object; Step 504, judging whether use LBT Channel Detection mechanism when sending described first sending object, when being judged to be no, performing step 506, otherwise, when being judged to be, perform step 508; Described step 506, directly sends described first sending object, and uses LBT Channel Detection mechanism when sending described second sending object; Described step 508, adjustment sends the parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, is greater than to make the probability of the described first sending object busy channel of transmission the probability sending described second sending object busy channel.

In technique scheme, preferably, described step 508 specifically comprises: the first Channel Detection Time granularity of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to second channel granularity detection time being less than the LBT Channel Detection mechanism sent corresponding to described second sending object, wherein, when for based on load LBT Channel Detection mechanism time, described first Channel Detection Time granularity and described second channel granularity detection time comprise: the Channel Detection Time granularity of initial channel granularity detection time and prolongation; And/or the first Channel Detection thresholding of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to the second channel detection threshold being greater than the LBT Channel Detection mechanism sent corresponding to described second sending object; And/or determine to send the type of described first sending object and the respectively corresponding LBT Channel Detection mechanism of described second sending object, to send the described parameter information of described first sending object and the corresponding respectively LBT Channel Detection mechanism of described second sending object according to described type adjustment.

In this technical scheme, when transmission first sending object and the second sending object all need to carry out LBT Channel Detection, can in the following manner in one or more adjustment transmission first sending objects and the parameter informations of the LBT Channel Detection mechanism corresponding to the second sending object, comprise particularly: (1) is by adjustment Channel Detection Time granularity, that is, make the first Channel Detection Time granularity of the LBT Channel Detection mechanism corresponding to transmission first sending object (such as, 20us) be less than second channel granularity detection time of the LBT Channel Detection mechanism corresponding to transmission second sending object (such as, 34us), so, the probability of the busy channel of transmission first sending object is improved by the mode shortening Channel Detection Time granularity, preferentially busy channel carries out transfer of data, wherein, when for based on load LBT Channel Detection mechanism time, the Channel Detection Time granularity (ECCAslot) that Channel Detection Time granularity at least comprises initial channel granularity detection time (initial CCA slot) and extends, such as, send in the LBT Channel Detection mechanism of descending PDSCH data, initial CCA granularity detection time is 34us, granularity detection time of extended CCA is 20us, and descending PDCCH/EPDCCH sends in the LBT Channel Detection mechanism of UL grant (or sending up PUSCH) data, initial CCA granularity detection time is 20us, extended CCA granularity detection time is 9us, (2) by adjustment Channel Detection thresholding, that is, the first Channel Detection thresholding of the LBT Channel Detection mechanism corresponding to transmission first sending object is made to be greater than the second channel detection threshold of the LBT Channel Detection mechanism corresponding to transmission second sending object, so, the compatibility to channel disturbance can be improved by increase Channel Detection thresholding, as long as namely channel disturbance is not very large, just the first sending object can be sent, and then the probability of the busy channel of raising transmission first sending object, (3) by adjusting parameter information according to the further refinement of the type of the LBT Channel Detection mechanism sent corresponding to different sending objects, to improve the probability of the busy channel of the forward sending object of priority rank, and then improve the uplink throughput of LAA system.

In this technical scheme, determine transmission first sending object and the second sending object corresponding for based on load LBT Channel Detection mechanism time, the the second competition window length making the first competition window length of the Channel Detection Time of prolongation corresponding to transmission first sending object be less than the Channel Detection Time of prolongation corresponding to transmission second sending object can be accomplished in several ways, to guarantee the exploitativeness of scheme, specifically comprise following several: (1) is when being set to fixing competition window length value by the first competition window length and the second competition window length, directly be adjusted to the first competition window length and be less than the second competition window length, even if when proper LBT Channel Detection mechanism is based on LBE, when random number N gets smaller value, the probability of busy channel is high, such as, value for the first competition window length of the Channel Detection Time of the prolongation corresponding to transmission first sending object gets 4, and the value sending the second competition window length of the Channel Detection Time of the prolongation corresponding to the second sending object gets 16 to 32, so send random number N in the LBT Channel Detection mechanism corresponding to the first sending object to get from 1 ~ q, then smaller value can be got, just mean that needs are when less CCA detects channel idle detection time, just send the first sending object, (2) the second competition window length is set to variable competition window length value by the first competition window length is set to fixing competition window length value, is less than the second competition window length to make the first competition window length, (3) when the first competition window length and the second competition window length are set to variable competition window length value, be less than the second upper confinement boundary value of the second competition window length and the second lower limit boundary value (i.e. maximum and minimum value) respectively by making the first upper confinement boundary value of the first competition window length and the first lower limit boundary value (i.e. maximum and minimum value) and make the first increasing value of the first competition window length (such as increasing value is less than the first competition window length) be less than the second increasing value of the second competition window length (such as increasing value is equal with the second competition window length, can be doubled and redoubled), the second competition window length is less than to make the first competition window length, so, improve the probability of the busy channel of transmission first sending object, and then improve 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 Figure 6, the adjustment System 600 of channel occupancy probabilities according to an embodiment of the invention, for base station, comprise: determination module 602, for determining the first sending object that described base station is to be sent and the second sending object, wherein, the priority of described first sending object is higher than the priority of described second sending object; Whether judge module 604, use LBT Channel Detection mechanism for judging when sending described first sending object; Control module 606, for when being judged to be no, controlling directly to send described first sending object, and using LBT Channel Detection mechanism when sending described second sending object; And adjusting module 608, for when being judged to be, adjustment sends the parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, is greater than to make the probability of the described first sending object busy channel of transmission the probability sending described second sending object busy channel.

In technique scheme, preferably, described adjusting module 608 specifically for: the first Channel Detection Time granularity of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to second channel granularity detection time being less than the LBT Channel Detection mechanism sent corresponding to described second sending object, wherein, when for based on load LBT Channel Detection mechanism time, described first Channel Detection Time granularity and described second channel granularity detection time comprise: the Channel Detection Time granularity of initial channel granularity detection time and prolongation; And/or the first Channel Detection thresholding of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to the second channel detection threshold being greater than the LBT Channel Detection mechanism sent corresponding to described second sending object; And/or determine to send the type of described first sending object and the respectively corresponding LBT Channel Detection mechanism of described second sending object, to send the described parameter information of described first sending object and the corresponding respectively LBT Channel Detection mechanism of described second sending object according to described type adjustment.

In technique scheme, preferably, determine to send described first sending object and described second sending object corresponding for LBT Channel Detection mechanism based on frame structure time, described adjusting module 608 specifically for: is adjusted to the repetition period being less than the second channel detection time sent corresponding to described second sending object the repetition period of the first Channel Detection Time sent corresponding to described first sending object; And determine to send described first sending object and described second sending object corresponding for LBT Channel Detection mechanism based on load time, described adjusting module 608 specifically for: by the first competition window length adjustment of the Channel Detection Time of the prolongation sent corresponding to described first sending object for being less than the second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object; And/or by second time of delay being adjusted to the Channel Detection Time of the prolongation when channel busy being detected be less than corresponding to described second sending object the first time of delay of the Channel Detection Time of the prolongation when channel busy being detected corresponding to described first sending object of transmission.

In technique scheme, preferably, determine to send described first sending object and described second sending object corresponding for the described LBT Channel Detection based on load mechanism time, described adjusting module concrete 608 for: described first competition window length and described second competition window length are set to fixing competition window length value, and by the described first competition window length adjustment of the Channel Detection Time of the prolongation sent corresponding to described first sending object for being less than the described second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object, or the described first competition window length of the Channel Detection Time of the prolongation sent corresponding to described first sending object is set to fixing competition window length value, and the described second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object is set to variable competition window length value, or described first competition window length and described second competition window length are set to variable competition window length value, and the first upper confinement boundary value of the described first competition window length of the Channel Detection Time of the prolongation corresponding to described first sending object of transmission and the first lower limit boundary value are adjusted to respectively the second upper confinement boundary value and the second lower limit boundary value of the described second competition window length of the Channel Detection Time being less than the prolongation sent corresponding to described second sending object, and the first increasing value of described first competition window length is adjusted to the second increasing value being less than described second competition window length.

In this technical scheme, determine transmission first sending object and the second sending object corresponding for based on load LBT Channel Detection mechanism time, the the second competition window length making the first competition window length of the Channel Detection Time of prolongation corresponding to transmission first sending object be less than the Channel Detection Time of prolongation corresponding to transmission second sending object can be accomplished in several ways, to guarantee the exploitativeness of scheme, specifically comprise following several: (1) is when being set to fixing competition window length value by the first competition window length and the second competition window length, directly be adjusted to the first competition window length and be less than the second competition window length, even if when proper LBT Channel Detection mechanism is based on LBE, when random number N gets smaller value, the probability of busy channel is high, such as, value for the first competition window length of the Channel Detection Time of the prolongation corresponding to transmission first sending object gets 4, and the value sending the second competition window length of the Channel Detection Time of the prolongation corresponding to the second sending object gets 16 to 32, so send random number N in the LBT Channel Detection mechanism corresponding to the first sending object to get from 1 ~ q, then smaller value can be got, just mean that needs are when less CCA detects channel idle detection time, just send the first sending object, (2) the second competition window length is set to variable competition window length value by the first competition window length is set to fixing competition window length value, is less than the second competition window length to make the first competition window length, (3) when the first competition window length and the second competition window length are set to variable competition window length value, be less than the second upper confinement boundary value of the second competition window length and the second lower limit boundary value (i.e. maximum and minimum value) respectively by making the first upper confinement boundary value of the first competition window length and the first lower limit boundary value (i.e. maximum and minimum value) and make the first increasing value of the first competition window length (such as increasing value is less than the first competition window length) be less than the second increasing value of the second competition window length (such as increasing value equals the second competition window length, can be doubled and redoubled), the second competition window length is less than to make the first competition window length, so, improve the probability of the busy channel of transmission first sending object, and then improve the uplink throughput of LAA system.

As shown in Figure 7, base station 700 according to an embodiment of the invention, comprise: the adjustment System 600 of the channel occupancy probabilities according to any one of above-mentioned second aspect, therefore, this base station 700 has the technique effect identical with the adjustment System 600 of the channel occupancy probabilities according to any one of second aspect, does not repeat them here.

More than be described with reference to the accompanying drawings technical scheme of the present invention, according to the difference of base station sending object, different LBT Channel Detection mechanism or parameter are set, the sending object making priority rank forward can preferential busy channel, namely effectively can improve the probability of the busy channel of the forward sending object of priority rank, and then improve the uplink throughput of LAA system.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a method of adjustment for channel occupancy probabilities, for base station, is characterized in that, comprising:

Determine the first sending object that described base station is to be sent and the second sending object, wherein, the priority of described first sending object is higher than the priority of described second sending object;

Judge whether use LBT Channel Detection mechanism when sending described first sending object;

When being judged to be no, directly send described first sending object, and use LBT Channel Detection mechanism when sending described second sending object;

When being judged to be, adjustment sends the parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, is greater than to make the probability of the described first sending object busy channel of transmission the probability sending described second sending object busy channel.

2. the method for adjustment of channel occupancy probabilities according to claim 1, it is characterized in that, described when being judged to be, adjustment sends the parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, to make the probability of the described first sending object busy channel of transmission be greater than the probability sending described second sending object busy channel, specifically comprise:

First Channel Detection Time granularity of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to second channel granularity detection time being less than the LBT Channel Detection mechanism sent corresponding to described second sending object, wherein, when for based on load LBT Channel Detection mechanism time, described first Channel Detection Time granularity and described second channel granularity detection time comprise: the Channel Detection Time granularity of initial channel granularity detection time and prolongation; And/or

First Channel Detection thresholding of the LBT Channel Detection mechanism sent corresponding to described first sending object is adjusted to the second channel detection threshold being greater than the LBT Channel Detection mechanism sent corresponding to described second sending object; And/or

Determine the type of the LBT Channel Detection mechanism of described first sending object of transmission and described second sending object difference correspondence, to send the described parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence according to described type adjustment.

3. the method for adjustment of channel occupancy probabilities according to claim 2, it is characterized in that, the described type determining the LBT Channel Detection mechanism sending described first sending object and described second sending object difference correspondence, to send the described parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence according to described type adjustment, specifically comprise:

Determine to send described first sending object and described second sending object corresponding for LBT Channel Detection mechanism based on frame structure time, is adjusted to the repetition period being less than the second channel detection time sent corresponding to described second sending object the repetition period of the first Channel Detection Time sent corresponding to described first sending object; And

Determine send described first sending object and described second sending object corresponding for based on load LBT Channel Detection mechanism time, adjustment sends the described parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, comprising:

By the first competition window length adjustment of the Channel Detection Time of the prolongation sent corresponding to described first sending object for being less than the second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object; And/or

By second time of delay being adjusted to the Channel Detection Time of the prolongation when channel busy being detected be less than corresponding to described second sending object the first time of delay of the Channel Detection Time of the prolongation when channel busy being detected corresponding to described first sending object of transmission.

4. the method for adjustment of channel occupancy probabilities according to claim 3, it is characterized in that, described determine send described first sending object and described second sending object corresponding for based on load LBT Channel Detection mechanism time, be the second competition window length of the Channel Detection Time being less than prolongation corresponding to described second sending object of transmission by the first competition window length adjustment sending the Channel Detection Time of prolongation corresponding to described first sending object, specifically comprise:

Described first competition window length and described second competition window length are set to fixing competition window length value, and by the described first competition window length adjustment of the Channel Detection Time of the prolongation sent corresponding to described first sending object for being less than the described second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object; Or

The described first competition window length of the Channel Detection Time of the prolongation sent corresponding to described first sending object is set to fixing competition window length value, and the described second competition window length of the Channel Detection Time of the prolongation sent corresponding to described second sending object is set to variable competition window length value; Or

Described first competition window length and described second competition window length are set to variable competition window length value, and the first upper confinement boundary value of the described first competition window length of the Channel Detection Time of the prolongation corresponding to described first sending object of transmission and the first lower limit boundary value are adjusted to respectively the second upper confinement boundary value and the second lower limit boundary value of the described second competition window length of the Channel Detection Time being less than the prolongation sent corresponding to described second sending object, and the first increasing value of described first competition window length is adjusted to the second increasing value being less than described second competition window length.

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

Described first sending object comprises: descending transmission comprises the PDCCH/EPDCCH signaling of the mandate instruction of dispatching uplink PUSCH or sends up PUSCH data;

Described second sending object comprises: send descending PDSCH data.

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

Described first sending object comprises: send up PUSCH data, and the dispatch of the uplink authorization instruction of the up PUSCH data of described transmission is sent by the PDCCH/EPDCCH of unauthorized frequency range;

Described second sending object comprises: send up PUSCH data, and the dispatch of the uplink authorization instruction of the up PUSCH data of described transmission sends by authorizing the PDCCH/EPDCCH of frequency range.

7. an adjustment System for channel occupancy probabilities, for base station, is characterized in that, comprising:

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

Whether judge module, use LBT Channel Detection mechanism for judging when sending described first sending object;

Control module, for when being judged to be no, controlling directly to send described first sending object, and using LBT Channel Detection mechanism when sending described second sending object; And

Adjusting module, for when being judged to be, adjustment sends the parameter information of the LBT Channel Detection mechanism of described first sending object and described second sending object difference correspondence, is greater than to make the probability of the described first sending object busy channel of transmission the probability sending described second sending object busy channel.

8. the adjustment System of channel occupancy probabilities according to claim 7, is characterized in that, described adjusting module specifically for:

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

Determine to send described first sending object and described second sending object corresponding for LBT Channel Detection mechanism based on frame structure time, described adjusting module specifically for: is adjusted to the repetition period being less than the second channel detection time sent corresponding to described second sending object the repetition period of the first Channel Detection Time sent corresponding to described first sending object; And

Determine send described first sending object and described second sending object corresponding for based on load LBT Channel Detection mechanism time, described adjusting module specifically for:

10. the adjustment System of channel occupancy probabilities according to claim 9, it is characterized in that, determine to send described first sending object and described second sending object corresponding for the described LBT Channel Detection based on load mechanism time, described adjusting module concrete also for:

The adjustment System of 11. channel occupancy probabilities according to any one of claim 7 to 10, is characterized in that,

Described second sending object comprises: send descending PDSCH data.

The adjustment System of 12. channel occupancy probabilities according to any one of claim 7 to 10, is characterized in that,

13. 1 kinds of base stations, is characterized in that, comprising: the adjustment System of the channel occupancy probabilities according to any one of claim 7 to 12.