CN106341902A

CN106341902A - Method and equipment for competing channel resources

Info

Publication number: CN106341902A
Application number: CN201510505856.9A
Authority: CN
Inventors: 李迎阳; 王轶; 孙程君
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecom R&D Center; Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2015-07-07
Filing date: 2015-08-17
Publication date: 2017-01-18

Abstract

The invention provides a method for competing channel resources. The method comprises the steps that: first equipment determines a parameter thereof for carrying out an LBT operation; ICCA is executed under the circumstance that a condition of executing an initial CCA (ICCA) is satisfied, that is, the first equipment occupies a channel as long as the first equipment detects that the channel is idle and set delay time BiCCA arrives; and the first equipment executes an extended CCA (ECCA) operation when the condition of executing the ICCA is not satisfied. The invention further provides corresponding equipment. According to the method and the equipment, technical schemes for processing the LBT under different circumstances are provided by the invention, and the effectiveness of channel competition of the LTE equipment is improved on the premise of ensuring fairness.

Description

A kind of method and apparatus of competitive channel resource

Technical field

The present invention relates to wireless communication field is and in particular in Long Term Evolution (lte) system on exempting from licensed band The method and apparatus of competitive channel resource.

Background technology

In Long Term Evolution (lte) system of 3gpp standardization body, based on hybrid automatic repeat-request (harq) Transmitting downlink data, correspondingly, user equipment (ue) is receiving after the data of base station technology, needs phase Harq-ack information should be fed back in ground, that is, ack indicates that a transmission block (tb) is properly received, and nack refers to Show tb reception failure.The harq-ack information of ue also includes discontinuous transmission (dtx), that is, representing ue does not have Receive the descending scheduling signaling (dl grant) of base station, this can be the resource that ue is not really dispatched in base station, or Ue does not receive the dl grant of base station.According to the harq timing of lte system, to the data in descending sub frame n Transmission, its harq-ack information is feedback in sub-frame of uplink n+k, and k is more than or equal to 4.Specifically, to fdd One cell of system, only needs to feed back the harq-ack of the data in a descending sub frame in a sub-frame of uplink Information.As shown in figure 1, to fdd system, k is equal to 4.A cell to tdd system, when in its frame structure Descending sub frame data be more than sub-frame of uplink when, typically need to feed back in multiple descending sub frames in a sub-frame of uplink The harq-ack information of data, the plurality of descending sub frame is referred to as the binding window of this sub-frame of uplink corresponding.As Shown in Fig. 2, taking tdd system tdd uplink-downlink configuration 2 as a example, in binding window, comprise 4 subframes, and k More than or equal to 4.

In lte system, to obtain bigger bandwidth of operation by combining multiple unit carrier waves (cc), to constitute The downlink of communication system and up-link, that is, adopt carrier aggregation (ca) technology, thus supporting higher Transfer rate.Here, the cc condensing together both can adopt identical duplex mode, is that fdd is little entirely Area or be tdd cell entirely, it would however also be possible to employ different duplex modes, exist simultaneously fdd cell and Tdd cell.To a ue, base station can configure it and work in multiple cell, and one of them is main cell (pcell), other cell referred to as time cell (scell).To lte ca system, based on physical uplink control The hybrid automatic repeat-request response that channel (pucch, physical uplink control channel) processed is transmitted (harq-ack) only transmit on pcell with channel condition information (csi).

For lte system, in order to meet the demand of service of mobile communication increase, need to excavate more frequencies Spectrum resource.On exempting from licensed band, deployment lte system is a possible solution.Exempt from licensed band general The allocated for certain other purposes, for example, the WLAN of radar system and/or 802.11 series (wifi) system.The wifi system of 802.11 series is based on carrier sense multiple access/conflict avoidance (csma/ca) mechanism works, a mobile station (sta) had to detection wirelessly before sending signal Channel, only just can take this wireless channel after wireless channel is idle and keeps certain period of time and send Signal.Sta can combine and jointly judges radio channel state using two sets of mechanism.On the one hand, sta can adopt With the actual detection wireless channel of carrier sense technology (carrier sensing), when the letter other sta is detected Number or when the signal power that detects exceedes setting thresholding, confirm that wireless channel does.At this moment, in this sta Vacant channels monitoring (cca, the clear channel assessment) report that physical layer block is reported to its high-rise module Accuse instruction wireless channel to hurry.On the other hand, the wifi system of 802.11 series also introduces virtual carrier sensing in wireless network communication skill Art, i.e. system allocation vector (nav), each 802.11 frame contains the duration (duration) Domain, the nav value confirmation according to duration field setting can not sending signal over the wireless channel, nav refers to Show the time needing reserved wireless channel.

When disposing lte system on exempting from licensed band, in order to avoid with other lte equipment or other no linear systems The interference of system equipment, lte equipment needs first to detect the state of channel before sending signal, i.e. listem-before-talk (lbt, listen before talk), when only meeting channel occupancy condition, equipment could busy channel.And And, the Channel holding time of equipment can be one or more subframe, then must discharge channel, thus staying Chance to other equipment busy channel.

According to Europe with regard to exempting from the regulation (regulation) of licensed band, carry out the equipment of lbt based on load (lbe), the unit interval (tu) of cca detection is at least 20us, and equipment executes cca in a tu Detection channel, if it find that channel idle, then equipment can direct busy channel；If it find that channel busy, then Equipment needs to start extension cca (ecca) process, i.e. randomly generates number n and arranges cca detection Counter, every time this equipment finds that channel keeps the free time then can be to above-mentioned counting in a tu later Device subtracts one, if this equipment finds channel busy, counter keeps constant, when counter clear, This equipment can be with busy channel.Here, n is to randomly select in the range of [1, q], and competition window (cw) span of size q is from 4 to 32.To lbe equipment, when meeting channel occupancy condition, It can be equal to (13/32) q with the maximum time length of busy channel.According to the discussion of present lte, in order to exempt from The other system of licensed band, such as wifi close friend coexist, can semi-static or dynamic change cw big Little.The features such as the harq timing of lte system, the concrete operations to above-mentioned lbt bring certain restriction, such as The lbt of what design effectively lte system, is a problem to be solved.

Content of the invention

The present invention is intended to provide a kind of method and apparatus of competitive channel resource, on the premise of ensureing justice, to improve The validity of lte equipment competitive channel.

A kind of method of competitive channel resource that the application provides includes:

First equipment determines the parameter carrying out listem-before-talk lbt operation；

In the case of the condition meeting execution initial vacant channels detection icca, described first equipment is exempting to permit Execution icca in one channel of frequency range, described execution icca include: as long as the first equipment detects channel sky Time delay b that is not busy and reaching setting_icca, the first equipment is with regard to busy channel；

When being unsatisfactory for the condition of described execution icca, described first equipment is exempting from a channel of licensed band Interior execution extension vacant channels detection ecca process.

Preferably, one is exempted from a carrier wave a of licensed band, the condition of described execution icca include following arbitrarily One or more:

After the first equipment does not send successful data to the second equipment, when the first equipment is to configuration And when have activated any one second equipment generation new data of carrier wave a, the first equipment executes in carrier wave a icca；

First equipment not schedule data transmission on carrier wave a, but to configuring and have activated carrier wave on other carrier waves The second equipment scheduling data transfer of a, then when the first equipment determines to re-use carrier wave a transmission data, the One equipment executes icca on carrier wave a；

When the first equipment completes to the ecca process of carrier wave a, the first equipment does not raise degrees of data in carrier wave a Transmission, but the first equipment passes to the second equipment scheduling data configuring and have activated carrier wave a on other carrier waves Defeated, then, when the first equipment needs using carrier wave a transmission data, the first equipment executes icca on carrier wave a；

When the first equipment completes to the ecca process of carrier wave a, the first equipment is not right on any one carrier wave Configure and have activated the second equipment scheduling data transfer of carrier wave a, then when the first equipment needs to pass using carrier wave a During transmission of data, the first equipment executes icca on carrier wave a；

When the first equipment is configured with least one second equipment on carrier wave a, but all in deactivation status, Then when at least one second equipment that have activated carrier wave a and it needs to during transmission data, the first equipment is in carrier wave a Upper execution icca；

When the event leading to carry out data transmission be there occurs on carrier wave a, after described event terminates, if First equipment needs in carrier wave a transmission data, and the first equipment executes icca on carrier wave a；

First equipment, after carrier wave a terminates a channel occupancy, at least one neighbouring carrier wave is still taking Channel carries out data transmission, and the first equipment pauses at the lbt operation on carrier wave a, when neighbouring carrier wave all terminates After channel occupancy, the first equipment executes icca in carrier wave a；

First equipment starts to execute ecca process in carrier wave a, completes it in the ecca process of carrier wave a Before, the first equipment starts busy channel at least one neighbouring carrier wave and carries out data transmission, the first hanging equipment Play the ecca operation on carrier wave a, after neighbouring carrier wave all terminates channel occupancy, the first equipment is in carrier wave Icca is executed on a.

Preferably, the described event leading to carry out data transmission include following any one or more:

The time period of the second device transmission signal；

The free time section of network configuration；

The measurement interval of the first equipment.

Preferably, described first equipment execution icca process also includes:

When the first equipment detects channel busy, the new ecca process of the first equipment execution；Or, if there are one The ecca process hung up, the first equipment continues executing with the ecca process of described hang-up, otherwise, the first equipment execution New ecca process.

Preferably, one is exempted from a carrier wave a of licensed band, execution ecca process includes:

When channel occupancy of the first device end, and also when there is the data do not transmitted, the first equipment is carrying New ecca process is started on ripple a；

Or, when first channel occupancy of device end, also there is the data do not transmitted, and setting Time t_minInherence carrier wave a on there is not the event leading to carry out data transmission, the first equipment is in carrier wave New ecca process is started on a；

Or, after terminating a channel occupancy, the first equipment starts new on carrier wave a the first equipment Ecca process；

Or, after the first device end one time channel occupancy, if in setting time t_minInherence carrier wave a on The event that can not carry out data transmission is led to, the first equipment starts new ecca on carrier wave a described in not existing Process；

Or, after the described event leading to carry out data transmission terminates, the first equipment starts new Ecca process；

Or, the first equipment is after terminating a channel occupancy it is assumed that still existing at least one neighbouring carrier wave Busy channel carries out data transmission, then the first equipment pauses at the lbt operation on carrier wave a, when neighbouring carrier wave After being all over channel occupancy, the first equipment starts new ecca process on carrier wave a.

Preferably, the method also includes:

When the first equipment needs using carrier wave a transmission data, if described ecca process has completed, first Equipment executes icca；If described ecca process does not complete, the first equipment continues described ecca process；

Or, when the first equipment needs using carrier wave a transmission data, the first equipment execution icca；When detecting During channel busy, the new ecca process of the first equipment execution；Or, when channel busy is detected, hang if there are one The ecca process rising, the first equipment continues executing with the ecca process of described hang-up, and otherwise, the first equipment execution is new Ecca process.

If preferably, the first equipment is after terminating a channel occupancy, start to execute ecca process, and described Time t_minWithin will occur described in lead to the event that can not carry out data transmission, the method also includes:

If in t_minInside complete ecca process, when the described event leading to carry out data transmission terminates Afterwards, if necessary in carrier wave a transmitting data, the first equipment execution icca；

If in t_minInterior described ecca process does not complete, then in the described thing leading to and can not carrying out data transmission In the time period of part, hang up ecca process, after the described event leading to carry out data transmission terminates, First equipment continues the ecca process of described hang-up；Or, the first equipment execution icca, when detecting channel Busy, the new ecca process of the first equipment execution；Or, the first equipment continues executing with described hang-up Ecca process.

Preferably, one is exempted from a carrier wave a of licensed band, described execution ecca includes:

If ecca process has completed, and to leading to the event that can not carry out data transmission described in producing next time Moment interval more than or equal to set time t_dmin, then the first hold facility channel；Or, if arrived down The interval leading to the moment of event that can not carry out data transmission described in once producing is less than t_dmin, lead to can not when described After the event carrying out data transmission terminates, the first equipment execution icca；Or, the first equipment hangs up ecca process, After the described event leading to carry out data transmission terminates, the first equipment continues the lbt operation of carrier wave a；

If ecca process has completed, and to leading to the event that can not carry out data transmission described in producing next time Moment interval more than or equal to set time t_dmin2, then the first hold facility channel；If ecca mistake Journey is also underway, but is less than t to the interval in the moment of above-mentioned event producing_dmin2, the first equipment hang-up ecca Operation, after the described event leading to carry out data transmission terminates, the first equipment continues the lbt behaviour of carrier wave a Make；

Before the ecca process of carrier wave a completes, if the first equipment starts at least one neighbouring carrier wave Upper busy channel carries out data transmission, and the first equipment hangs up the ecca process on carrier wave a, when neighbouring load After ripple is all over channel occupancy, the first equipment continues the lbt of carrier wave a.

Preferably, the described parameter carrying out lbt operation includes: competition window cw；

One is exempted from a carrier wave a of licensed band, described execution ecca includes: if the one of the first equipment Ecca process well afoot, the first equipment have adjusted cw, then the first equipment is correspondingly adjusted according to the change of cw The ecca state counter of whole currently ongoing ecca process or timer.

Preferably, the described adjustment currently ecca state counter of ongoing ecca process or timer bag Include:

If in the ecca process starting currently to carry out, the value of cw is cw₀, the corresponding target producing with Machine number is n₀, and the cw size after assuming currently to adjust is cw_k, then adjusting target random number is n_k=n₀·cw_k/cw₀；

If in once adjusting before the ecca process currently carrying out, the value of corresponding cw is cw_k-1, accordingly The target random number producing is n_k, and the cw size after assuming currently to adjust is cw_k, then adjusting target random number is n_k=n_k-1·cw_k/cw_k-1.

Preferably, remembering that up to the present the first equipment has been detected by x idle cca time slot, described execution ecca Including:

If x >=n_k, the first equipment execution icca；Otherwise, the first equipment continues executing with ecca process, and And n is being detected_kBusy channel during-x free time cca time slot.

Preferably, the described parameter carrying out lbt operation includes: cw；

One is exempted from a carrier wave a of licensed band, described execution ecca includes: according to cw excursion Little value cwmin is determining maximum channel holding time.

If in the ecca process starting currently to carry out, the value of cw is cw₀, and assume currently to adjust Cw size is cw_k, the surplus value of note ecca state counter or timer is n, then adjust ecca shape The surplus value of state counter or timer is n'=n cw_k/cw₀；Or,

If after the cw of the front ecca process once adjusting and currently carrying out, the value of corresponding cw is cw_k-1, and assume that currently adjusting cw size is cw_k, the residue of note ecca state counter or timer It is worth for n, then the surplus value of adjustment ecca state counter or timer is n'=n cw_k/cw_k-1.

Disclosed herein as well is a kind of equipment, comprising: parameter determination module and channel detection module；Wherein:

Described parameter determination module, for determining the parameter carrying out lbt operation；

Described channel detection module, in the case of the condition meeting execution icca, executes icca, described execution Icca includes: as long as channel idle is detected and reaching the time delay b of setting_icca, described equipment is with regard to busy channel； When being unsatisfactory for the condition of described execution icca, execute ecca process.

As seen from the above technical solution, the method and apparatus of the competitive channel resource that the application provides, the first first equipment Determine that it carries out the parameter of lbt operation, then, in the case of meeting the condition executing initial cca (icca), Execution icca, i.e. as long as the first equipment detects channel idle and reaches the time delay of setting, the first equipment is just Busy channel；In the condition being unsatisfactory for executing icca, the first equipment execution extension cca (ecca) operation. And, the application further provides the technical scheme processing lbt in a variety of situations, thus ensureing justice On the premise of, improve the validity of lte equipment competitive channel.

Brief description

Fig. 1 is the harq-ack timing relationship schematic diagram of lte fdd；

Fig. 2 is the harq-ack timing relationship schematic diagram of lte tdd；

Fig. 3 is the method flow diagram of competitive channel resource of the present invention；

Fig. 4 is the schematic diagram processing the icca leading to the event being unable to downlink transfer in the embodiment of the present application one；

Fig. 5 is the icca schematic diagram processing the operation of adjacent frequency lbt in the embodiment of the present application one；

Fig. 6 is the schematic diagram one processing new data transmission in the embodiment of the present application two；

Fig. 7 is the schematic diagram two processing new data transmission in the embodiment of the present application two；

Fig. 8 is the schematic diagram processing the ecca leading to the event being unable to downlink transfer in the embodiment of the present application two One；

Fig. 9 is the ecca schematic diagram one processing the operation of adjacent frequency lbt in the embodiment of the present application two；

Figure 10 is the schematic diagram processing the ecca leading to the event being unable to downlink transfer in the embodiment of the present application three Two；

Figure 11 is the ecca schematic diagram two processing the operation of adjacent frequency lbt in the embodiment of the present application three；

Figure 12 is the schematic diagram of the adjustment cw of 802.11 standards；

Figure 13 is a kind of schematic diagram of adjustment cw；

Figure 14 is the schematic diagram one of lte system call interception cw in the embodiment of the present application four；

Figure 15 is the schematic diagram two of lte system call interception cw in the embodiment of the present application four；

Figure 16 is the composition structural representation of the preferable equipment of the application one.

Specific embodiment

In order that the purpose of the application, technological means and advantage become more apparent, below in conjunction with accompanying drawing to this Shen Please be described in further details.

When disposing lte system on exempting from licensed band, in order to avoid with other lte equipment or other no linear systems The interference of system equipment, lte equipment needs first to detect the state of channel before sending signal, i.e. lbt is only full During sufficient channel occupancy condition, equipment could busy channel.And, equipment is after the channel taking a period of time, Described Channel holding time not can exceed that maximum holding time, must discharge channel, thus leaving other equipment for The chance of busy channel.

It is the flow chart of lte equipment competitive channel resource allocation method of the present invention as shown in Figure 3, specifically include that

Step 301: the first equipment determines the parameter carrying out lbt operation.

The parameter of above-mentioned lbt operation can include postponing (defer) time, the size of competition window (cw), Cca slot length (slottime) and maximum channel holding time etc..The value of these parameters can be predefined , or configured by other network nodes, or the first equipment can also be according to lte system operation shape State carrys out these values of adjust automatically.For example, according to from the second equipment feedback or the first equipment detection, can Size with semi-static or dynamic adjustment cw.In the application subsequent descriptions, with the first equipment be base station, Two equipment are to illustrate, it is true that technical scheme provided herein can also be used for the first equipment as a example ue Be ue, the second equipment be base station.For exempting to permit the equipment such as the wifi equipment on working frequency range, this The first involved equipment of application and the second equipment also can be collectively referred to as lte equipment.

Step 302: in the case of meeting the condition executing initial cca (icca), execute initial icca, Described execution icca includes: as long as the first equipment detects channel idle and reaches the time delay of setting, note For b_icca, then the first equipment can take this channel at once.

In order to coexist with wifi close friend, b_iccaCan be close with the time delay of wifi, for example: with distribution association Conditioning function interFrameGap (difs) is close.

Step 303: when the condition being unsatisfactory for executing icca, the first equipment execution extension cca (ecca) Process.

First equipment continuously detects channel.When restarting every time or continue the ecca process being suspended, The time delay that first equipment reaches setting in channel idle (is designated as d_ecca) after, the first equipment continues detection letter Road, and when channel is detected every time and keeping idle in a cca slot length, update ecca state.

Here, if there is currently an ecca process being suspended, a lte equipment can continue this Ecca process；Otherwise, to produce random number n according to current competitive window parameter cw, and for again opening Beginning ecca process.In some cases, a lte equipment can abandon the ecca mistake being suspended Journey, that is, restart ecca process.

Here, in order to coexist with wifi close friend, d_eccaCan be close with the time delay of wifi, for example: with Difs is close.

The method describing several preferable renewal ecca states below, following several method is substantially equivalent:

1) initial value of setting ecca counter is n, and channel is being detected every time in a cca time slot When keeping idle in length, subtract 1 to ecca counter；When ecca counter clear, lte equipment can With busy channel.

2) initial value of setting ecca counter is 0, and long in a cca time slot channel is detected every time When keeping idle in degree, add 1 to ecca counter；When ecca counter reaches n, lte equipment can With busy channel.

3) note cca slot length is slottime, and the initial value of setting ecca timer is n slottime, And when channel is detected every time and keeping idle in a cca slot length, ecca timer is deducted slottime；When ecca timer is zeroed, lte equipment can be with busy channel.

4) initial value of setting ecca timer is 0, and long in a cca time slot channel is detected every time When keeping idle in degree, slottime is added to ecca timer；When the value of ecca timer reaches During n slottime, lte equipment can be with busy channel.

In five following preferred embodiments, the method for the present invention, institute are described based on ecca up counter The method of description is readily adaptable for use in other mechanism updating ecca state.

Embodiment one

According to the above-mentioned description to Fig. 3, in some conditions, icca can be executed.That is, as long as lte equipment Channel idle is detected and reach the time delay b of setting_iccaAfterwards it is possible to busy channel carries out data transmission. By executing icca it is allowed to the quick busy channel of lte equipment, reduce due to execution lbt operation waste when Between.If lte equipment detects channel busy, the new ecca process of lte equipment execution, i.e. lte sets The standby size according to current cw produces random number n, and arranges ecca state counter or timing Device.Or, if lte equipment detects channel busy it is assumed that currently there being an ecca process being suspended, Then lte equipment can continue to execute the ecca process of this hang-up；Otherwise, the execution of lte equipment is new Ecca process.

Lte equipment can execute icca in the following two cases.The first situation refers to: lte equipment is Do not need the data transmitted, when subsequently sometime creating new data, lte equipment can execute icca.Second situation is: the idle cca time slot detecting in the ecca process of lte equipment reaches n When individual, lte equipment does not have busy channel, then, when subsequently sometime needing transmission data, lte equipment can To execute icca.Here, in order that carrier wave with exempting from licensed band, ue is usually operated in ca pattern , that is, ue is configured with multiple carrier waves, and exempts from the carrier wave of licensed band and be configured to scell.

To the first situation above-mentioned, one is exempted from a carrier wave a of licensed band, to configuring and have activated carrier wave Any one ue of a it is assumed that base station does not send successful data to this ue, then follow-up certain When the individual moment produces new data to any one ue configuring and have activated carrier wave a, base station can be in carrier wave a Execution icca.Or, to the first situation above-mentioned, base station is based on its scheduling strategy it is assumed that its decision does not exist Exempt from schedule data transmission on a carrier wave a of licensed band, but the load of licensed band is still exempted from other in base station To the ue schedule data transmission configuring and have activated carrier wave a on the carrier wave of ripple or licensed band, then follow-up certain When base station of individual moment determines to re-use carrier wave a transmission data, base station can execute icca on carrier wave a. Here it is possible to limit further, only reach the threshold value of setting when the time that scheduling carrier wave a is abandoned in base station When, such as one subframe, just execute icca.

To above-mentioned second situation, one is exempted from a carrier wave a of licensed band, when the sky of its ecca process When not busy cca time slot reaches n, base station not schedule data transmission on carrier wave a；But, still may be used in base station To exempt from other on carrier wave of licensed band or the carrier wave of licensed band to the ue configuring and have activated carrier wave a Schedule data transmission, then, when subsequently sometime base station needs using carrier wave a transmission data, base station can carry Icca is executed on ripple a.Or, to above-mentioned second situation, one is exempted from a carrier wave a of licensed band, When the idle cca time slot of its ecca process reaches n, the load of licensed band is not exempted from any one in base station To the ue schedule data transmission configuring and have activated carrier wave a on the carrier wave of ripple or licensed band, then follow-up certain When individual moment base station needs using carrier wave a transmission data, base station can execute icca on carrier wave a.

In addition to above-mentioned two situations, base station can also execute icca in the other cases.

Assume to be configured with several ue on a carrier wave a exempting from licensed band, but currently all in deactivation State, then as at least one ue that have activated carrier wave a and it needs to during transmission data, base station can be in carrier wave a Upper execution icca.If there is currently ongoing ecca process, terminate this ecca process.This In although carrier wave a un-activation, but base station possibly always using other carrier waves come to being configured with carrier wave a Ue schedule data transmission.

To a carrier wave exempting from licensed band, base station can not carry out downlink transfer in certain situation.For example, above-mentioned The event that can not carry out downlink transfer is led to may refer to uplink transmission time section, that is, base station requires transformation into reception State, thus receive the uplink information of ue.Or, above-mentioned lead to the event that can not carry out downlink transfer permissible Refer to the free time section of network configuration, that is, base station is interior at one's leisure does not dispatch downlink data transmission, but can To detect the carrier wave exempting from licensed band, the signal such as including radar；When radar signal is detected, base station needs to interrupt Data transfer on this carrier wave, it is to avoid the interference to radar.Above-mentioned free time can be that the whole network is coordinated , thus lte signal is not existed on such time period；Or, can be to a part of base station, for example Neighbouring base station configuration identical free time, thus reduce the signal level of lte system as far as possible.By joining Put free time, the precision of detection radar signal can be increased.Or, above-mentioned lead to carry out downlink transfer Event may refer to the measurement interval of base station, i.e. in measurement interval, base station stops the descending of current carrier Transmission, and switch to the interference signal measuring this carrier wave, or measure the interference signal of other carrier waves, such as base station The loading condition of these carrier waves can be measured, so that it is determined that whether these carrier waves are still adapted to lte transmission.This In, if the interference exempting from a carrier wave of licensed band is too strong or load is too heavy, base station needs to avoid at this Work on individual carrier wave；If the interference of the carrier wave of base station work at present is too strong or load is too heavy, base station is permissible It is transformed into and work on other carrier waves.

As shown in figure 4, on a carrier wave a exempting from licensed band, correspondence is above-mentioned to be led to carry out descending biography Defeated event, after these lead to the event that downlink transfer is interrupted to terminate, if base station needs in carrier wave a transmission Data, base station can execute icca at once.Here, suppose that base station occur above-mentioned lead to carry out descending Do not carry out downlink transfer, then base station detects channel idle and continues b before the event of transmission_iccaAfterwards, base station can Maximum holding time is less than or equal to the time of busy channel；Or, because occur above-mentioned lead to carry out under The event of row transmission, the previous secondary channel holding time of base station is also not reaching to maximum channel holding time, then base Station detects channel idle and continues b_iccaAfterwards, following two side can be passed through with the time of busy channel in base station Method is determining: a kind of method is to make the time of base station busy channel be less than or equal to maximum holding time, that is, with generation Before the above-mentioned event leading to carry out downlink transfer, the time of busy channel is unrelated.Or, another kind of Method is the time it is assumed that base station has been transmitted before there is the above-mentioned event leading to carry out downlink transfer It is t_b, and remember that maximum holding time is t_max, then base station can be with the time of busy channel less than or equal to t_max-t_b. To later approach, if above-mentioned lead to the event that can not carry out downlink transfer to terminate after, base station is wished continuously The time of busy channel is more than t_max-t_b, then base station can re-execute ecca process.

Or, on a carrier wave a exempting from licensed band, correspondence is above-mentioned to be led to carry out the thing of downlink transfer Part, after these lead to the event that downlink transfer is interrupted to terminate, if the data that base station does not send, and Ecca process before is over, then lbt can be suspended in base station；If the number that base station does not send According to, but ecca process before does not complete, then the ecca process before base station can be continued.

As shown in figure 5, one is exempted from a carrier wave a of licensed band, base station accounts in down channel of end With rear it is assumed that one or more neighbouring carrier wave (still enters in busy channel on carrier wave x) as depicted Row downlink transfer, then, because receive and dispatch in adjacent carriers there is larger interference simultaneously, then base station can pause at Lbt operation on carrier wave a.After neighbouring carrier wave is all over down channel occupancy, base station can be at once Execute icca process in carrier wave a.Here it is possible to limit further because the channel occupancy of adjacent carriers causes The time-out lbt of carrier wave a time more than a threshold value when, base station just can execute on carrier wave a Icca process, otherwise base station execution ecca process.Above-mentioned thresholding is predefined or high-rise configuration.

One is exempted from a carrier wave a of licensed band it is assumed that base station has begun to execute ecca process.Carrying Before the ecca process of ripple a completes it is assumed that base station starts to take letter on one or more neighbouring carrier wave Road carries out downlink transfer.At this moment, there is larger interference because receive and dispatch in adjacent carriers simultaneously, then base station is permissible Hang up the ecca operation on carrier wave a.After neighbouring carrier wave is all over down channel occupancy, base station Icca can be executed on carrier wave a.Here it is possible to limit further because the channel occupancy of adjacent carriers is made When the time of the hang-up ecca of carrier wave a becoming is more than a threshold value, base station just can execute on carrier wave a Icca process.Above-mentioned thresholding is predefined or high-rise configuration.

Embodiment two

According to the above-mentioned description to Fig. 3, when the condition being unsatisfactory for executing icca, lte equipment needs to execute Ecca process.When needing to start new ecca process, base station produces one according to the size of current cw Random number n, and ecca state counter or timer are set；Base station starts to detect channel, when base station inspection Measure channel idle and reach the time delay d of setting_eccaAfterwards, detection channel is continued in base station, and examines each When measuring channel and keeping idle in a cca time slot, update ecca state counter or timer；When When n cca time slot is detected and meeting channel idle, base station can be with busy channel transmission data.According to embodiment One description, to a carrier wave exempting from licensed band, base station can not carry out downlink transfer in certain situation.Example As the above-mentioned event leading to carry out downlink transfer may refer to uplink transmission time, free time and/or survey Amount interval etc..

The first processes ecca process approach is one to be exempted from a carrier wave a of licensed band, when base station is firm Just terminate a down channel to take, and also when there is the downlink data not transmitted, base station has been restarted in carrier wave a On ecca process；Otherwise, if there is no the downlink data not transmitted, lbt is suspended in base station, does not hold Row icca and ecca, and in follow-up generation new data, base station executes lbt on carrier wave a.

Or, it is that one is exempted from a carrier wave a of licensed band that second processes ecca process approach, when When a down channel occupancy has just been terminated in base station, also there is the downlink data not transmitted, and in certain time t_minInherence carrier wave a on do not exist above-mentioned lead to carry out the event of downlink transfer, base station is restarted immediately Ecca process on carrier wave a；Or, if also there is the downlink data not transmitted, but in t_minWithin Exist above-mentioned lead to carry out the event of downlink transfer, lbt is suspended in base station, do not execute icca and Ecca, after the above-mentioned event knot leading to carry out downlink transfer, base station can execute icca process, Or the ecca process on carrier wave a is restarted in base station；Or, if there is no the downlink data not transmitted, Then lbt is suspended in base station, does not execute icca and ecca.Here, t_minIt is predefined or high-level signaling Configuration, t_minIt can be one comparatively short time, base station is during this period of time not enough to complete channel seize And transmission data.

The method processing ecca to above-mentioned the first and second, the downlink data that above-mentioned presence is not transmitted is permissible Refer to, at least one ue configuring and have activated carrier wave a, base station still has unsuccessful to this ue The data sent.

Or, the method that the third processes ecca process is that one is exempted from a carrier wave a of licensed band, The ecca process on carrier wave a, after terminating a down channel occupancy, is restarted immediately in base station.

Or, the method for the 4th kind of process ecca process is that one is exempted from a carrier wave a of licensed band, Just terminate a down channel when base station to take, if in certain time t_minInherence carrier wave a on do not exist Above-mentioned lead to carry out the event of downlink transfer, base station restarts the ecca process on carrier wave a immediately；No Then, if in t_minWithin exist above-mentioned lead to carry out the event of downlink transfer, lbt is suspended in base station, that is, Do not execute icca and ecca, after above-mentioned event terminates, the ecca process on carrier wave a is restarted in base station； Or, if base station needs in carrier wave a transmitting data, base station can execute icca.

Method to above-mentioned the third and the 4th kind process ecca, even if base station is when terminating a channel occupancy The downlink data not transmitted, i.e. to any one ue configuring and have activated carrier wave a, base station is Through not sending successful data to this ue, base station still can be restarted at once on carrier wave a Ecca process.

Method to above-mentioned the third and the 4th kind process ecca, terminates a down channel when base station and takies When, the downlink data not transmitted, but base station still starts ecca process at once.As Fig. 6 Shown, when subsequently sometime base station needs using carrier wave a transmission data, if this ecca process is Through completing, then base station can directly execute icca；If this ecca process does not complete, base station can be straight Succeed this ecca process continuous, until completing ecca process busy channel.Or, subsequently sometime When base station needs using carrier wave a transmission data, if this ecca process does not complete, base station can be direct Continue this ecca process, until completing ecca process busy channel；If this ecca process is Through completing, then base station needs to regenerate random number n to restart ecca process.Or, as shown in fig. 7, When subsequently sometime base station needs using carrier wave a transmission data, base station can execute icca.That is, base Station detects channel idle duration b_iccaAfterwards, base station can be with busy channel；If channel busy is detected, And this ecca process has completed, then base station restarts ecca process；If channel busy is detected, And this ecca process does not complete, then base station can continue directly to this ecca process, until completing Ecca process busy channel.

Correspondence the third method with the 4th kind of process ecca above-mentioned, a kind of equivalent method is that one is exempted to be permitted Can frequency range a carrier wave a, just terminated down channel when base station and taken it is assumed that base station does not exist does not pass Defeated downlink data, base station can not produce random number n, but base station still starts to detect channel, that is, work as base Station detects channel idle and reaches certain time delay d_eccaAfterwards, detection channel is continued in base station, and each When channel is detected and keeping idle in a cca time slot, the moment that record terminates down channel from base station takies Sum to the idle cca time slot of current time.So, when follow-up sometime base station needs using carrier wave a During transmission data, base station produces random number n according to the size of current cw, and remember terminate from base station descending The sum that the moment of channel takies the idle cca time slot of current time is x.If x is more than or equal to n, base Stand and can directly execute icca；Otherwise, base station can arrange ecca state counter or timer, thus So that when finding n-x idle cca time slot again, base station can be with busy channel.Or, when follow-up certain when Carve base station when needing using carrier wave a transmission data, base station can execute icca, i.e. base station detects channel Idle simultaneously duration b_iccaAfterwards, base station can be with busy channel.If channel busy is detected, base station is according to current The size of cw produces random number n, and remembers and terminate the moment taking down channel to current time from base station Idle cca time slot sum be x, base station can be arranged according to x and n ecca state counter or Person's timer.For example, if x is less than n, base station can arrange ecca state counter or timer, So that when finding n-x idle cca time slot again, base station can be with busy channel.If x be more than etc. In n, base station can arrange ecca state counter or timer with random number n；Or also may be used in base station Again random number n2 produced according to current cw size and to arrange ecca state counter or timer； Or, base station can also arrange ecca state counter according to current cw size, x and n or n2 Or timer, such as so that when finding n-xmodn idle cca time slot again, base station can take Channel.To above-mentioned icca, base station detects channel idle duration b_iccaAfterwards, base station can take letter Road.Above-mentioned b_iccaTime may refer to base station needs the length after the moment t using carrier wave a transmission data For b_iccaTime period；Or, if base station is carrying out ecca process in t and channel sky is detected Spare time, including being in time delay d_eccaIn the range of, or in the range of an idle cca time slot, then during t The time that base station before quarter detects channel gap can also calculate in b_iccaWithin time.

To above-mentioned the first process the method for ecca process it is assumed that once descending letter is being terminated in base station with the third After road takies, in above-mentioned time t_minWithin will occur above-mentioned to lead to carry out the event of downlink transfer.Base station It is after terminating a down channel occupancy, get started execution ecca process.Even if as shown in figure 8, t_minInside complete ecca process, but, above-mentioned lead to carry out the event of downlink transfer, base because existing Standing still can not be in t_minInterior occupancy down channel, after above-mentioned event terminates, if necessary to upload in carrier wave a Transmission of data, base station can execute icca.If t_minInterior ecca process does not complete, then lead to not above-mentioned In the time period of event that downlink transfer can be carried out, hang up ecca operation, after above-mentioned event terminates, base station This undone ecca process can be continued.Or, after above-mentioned event terminates, if necessary in carrier wave A transmitting data, base station can also execute icca, i.e. base station detects channel idle duration b_iccaAfterwards, base station can be with busy channel；If channel busy is detected, base station can start new ecca mistake Journey, or, continue this undone ecca process.t_minCan be very short, when certain protection is only provided Between (gp).For example, it is transmitted as example with up, gp provides the transmitting-receiving conversion time of base station and ue, on ue The cca time of measuring of row transmission, and subframe structure restriction etc..

5th kind process ecca process method be, when the above-mentioned event leading to carry out downlink transfer terminates Afterwards, base station can get started new ecca process.

Lead to carry out the dissimilar of the event of downlink transfer to above-mentioned, can be using identical mechanism at Reason lbt, or or the method using different process lbt.

Or, within the time period of the above-mentioned event leading to and can not carrying out downlink transfer, because base station is in execution Receive operation it is likely that whether continuation detected carrier a is idle.So lead to carry out descending biography above-mentioned In the time period of defeated event, the ecca process before updating can be continued in base station, or, base station can also It is to start a new ecca process.

The method of the 6th kind of process ecca process is, as shown in figure 9, one is exempted from a load of licensed band Ripple a, base station is being terminated after a down channel takies it is assumed that one or more neighbouring carrier wave is (as schemed institute Still carry out downlink transfer in busy channel, then, because receive and dispatch in adjacent carriers deposit simultaneously on the carrier wave x) showing In larger interference, then the lbt that base station can pause on carrier wave a operates.When neighbouring carrier wave has all been tied After bundle down channel takies, base station could start new ecca process on carrier wave a.

Embodiment three

According to the above-mentioned description to Fig. 3, during execution ecca, lte equipment continuously detects lte equipment Channel.When restarting every time or continue the ecca process being suspended, when lte equipment detects channel Free time reaches certain time delay, is designated as d_eccaAfterwards, lte equipment continues detection channel, and examines each When measuring channel and keeping idle in a cca slot length, update ecca state counter or timing Device.According to the description of embodiment one, to a carrier wave exempting from licensed band, base station can not be carried out in certain situation Downlink transfer.For example, the above-mentioned event leading to carry out downlink transfer may refer to uplink transmission time, sky Between idle and/or measurement interval etc..

Assume ecca process can be continued until produce above-mentioned lead to carry out the event of downlink transfer when Carve.As shown in Figure 10 it is assumed that ecca process has completed, and above-mentioned lead to enter to producing next time The interval in the moment of the event of row downlink transfer is more than or equal to regular hour t_dmin, then base station can take letter Road.t_dminIt can be the minimum time of base station busy channel.Or it is assumed that ecca process has completed, and Assume that above-mentioned interval is less than t_dmin, base station can not take down channel；Lead to carry out downlink transfer when above-mentioned Event terminate after, base station can execute icca.Or it is assumed that before ecca process terminates, create Above-mentioned lead to carry out the event of downlink transfer, then base station can from produce event moment start hang up Ecca process, does not update ecca state counter or timer.When above-mentioned lead to carry out descending After the event of transmission terminates, the ecca process being suspended before of carrier wave a can be continued in base station.Or, when After above-mentioned event terminates, base station can also execute icca, i.e. base station detects channel idle duration b_iccaAfterwards, base station can be with busy channel；If channel busy is detected, base station can continue directly to this Ecca process, or it is also possible to start new ecca process, until completing ecca process and taking letter Road.

Or it is assumed that ecca process has completed, and to produce next time above-mentioned lead to carry out descending The interval in the moment of event of transmission is more than or equal to regular hour t_dmin2, then base station can be with busy channel.Or Person it is assumed that ecca process is also underway, but to produce the moment of above-mentioned event interval already less than t_dmin2, then base station can hang up ecca operation.When the above-mentioned event leading to carry out downlink transfer terminates, The ecca process being suspended before of carrier wave a can be continued.Or, after above-mentioned event terminates, base station Icca can be executed, i.e. base station detects channel idle duration b_iccaAfterwards, base station can take letter Road；If channel busy is detected, base station can continue directly to this ecca process, or it is also possible to opens Begin new ecca process, until completing ecca process busy channel.

Or, within the time period of the above-mentioned event leading to and can not carrying out downlink transfer, because base station is in execution Receive operation it is likely that whether continuation detected carrier a is idle.So lead to carry out descending biography above-mentioned In the time period of defeated event, the ecca process before updating can be continued in base station.

As shown in figure 11, one is exempted from a carrier wave a of licensed band it is assumed that base station has begun to execute Ecca process.Before the ecca process of carrier wave a completes it is assumed that base station start at neighbouring one or (the upper busy channel of carrier wave x) carries out downlink transfer to multiple carrier waves as shown in the figure.At this moment, because in adjacent carriers There is larger interference in transmitting-receiving simultaneously, then base station can be the ecca operation hung up on carrier wave a.When neighbouring Carrier wave be all over after down channel takies, base station can continue carrier wave a before the ecca that is suspended Process.Or, base station can also execute icca, i.e. base station detects channel idle duration b_icca Afterwards, base station can be with busy channel；If channel busy is detected, base station can continue directly to this ecca mistake Journey, or it is also possible to start new ecca process, until completing ecca process busy channel.

One is exempted from a carrier wave a of licensed band it is assumed that base station has begun to execute ecca process.Carrying The downlink data that before the ecca process of ripple a completes it is assumed that base station is not transmitted, then, base station is permissible Continue to execute ecca process on carrier wave a；Or, the ecca behaviour on carrier wave a can also be hung up in base station Make.Here, the reason lead to the downlink data that base station is not transmitted, can be base station using configuration ue The data transfer to ue is completed on other carrier waves, or, because other reasonses, such as time-out, base station is lost Abandon the data of ue.

Example IV

Method to Fig. 3 of the present invention, the size of the cw of lte equipment can be change.For example, according to next From the feedback of ue or the detection of base station, exponentially change the window of cw, the minimum of its excursion Value and maximum are designated as cwmin and cwmax respectively.

As shown in figure 12, in 802.11 systems, equipment is transmitting a frame (frame, 802.11 frame Definition different from lte) after, equipment can get started detection response message, and according to detection response disappear The situation adjustment cw of breath.For example, after equipment sends a Frame, without receiving ack frame, Cw size doubles；If receiving ack frame, it is its minimum of a value cwmin that equipment is possible to reset cw.From And, equipment can produce random number n come competitive channel according to new cw size.Above-mentioned timing relationship ensure that 802.11 equipment adjust cw in time according to its data transmission scenarios, and process follow-up competition letter with new cw Road.But, in lte system, as depicted in figs. 1 and 2, base station transmission downlink data after, ue's Harq-ack feedback information needs at least 4ms to get to base station, and that is, the base station of existing lte system can only These harq-ack information could be applied after at least 4ms to adjust cw.

Figure 13 is a kind of schematic diagram of lte system call interception cw.As shown in figure 13, base station is terminating once to believe After road takies, before receiving the harq-ack information to the downlink data a just having transmitted for the ue, base station Have begun to new ecca process and carry out competitive channel.For example, base station, after terminating a channel occupancy, is stood Carve and start new ecca process.Note base station start new ecca process moment be t1, then base station according to when The cw carving t1 produces random number n, and arranges above-mentioned new ecca status of processes counter or timing Device.The cw of moment t1 can be at the basis harq-ack information that base station has received to moment t1 Reason obtains, but, the success of downlink data a or the situation of failure that base station has just been transmitted, because timing Limit it is impossible to for time adjustment t1 cw.After base station receives the harq-ack information of data a, Base station can adjust cw according to these new harq-ack information, but base station do not change ongoing The ecca state counter of ecca process or timer.Using this method, only complete currently After the ecca process carrying out busy channel transmission new data b, when the descending biography to new data b is terminated in base station Defeated and again competitive channel when, base station could use the above-mentioned harq-ack according to downlink data a letter The cw of breath adjustment.In terms of actual effect, base station needs to wait the long time, could be based on up-to-date cw Window carrys out competitive channel, that is, cw adjustment and application can not timely be reacted with the transmission feelings of downlink data Condition.

Based on analysis above, the present invention proposes method below, realize utilizing as early as possible the cw of up-to-date determination Lai Process competitive channel.Assume an ecca process well afoot of base station, base station is according to some Developing Tactics Cw, the present invention proposes base station and can correspondingly adjust currently ongoing ecca according to the change of cw The ecca state of process, for example, adjustment target random number, ecca state counter or timer etc., And continue executing with ecca process according to the ecca state after adjustment.Here, base station adjusts the former of cw Cause, can be that base station have received new harq-ack information, or base station detects letter by additive method Change of road state etc..

1) alternatively, the change according to cw, base station can adjust currently ongoing ecca process Adjustment target random number, and correspondingly adjust ecca state counter or timer.For example, as Figure 14 Shown, compared with Figure 13, after base station receives the harq-ack information of data a, base station can be according to this Harq-ack information new a bit is adjusting cw, and base station can correspondingly change ongoing ecca The target random number of process, and correspondingly adjustment ecca state counter or timer.So, as long as base Stand detection idle cca time slot number be more than or equal to adjust after target random number, base station just can take letter Road transmits new data b.

For example, it is assumed that in the ecca process starting currently to carry out, the value of cw is cw₀, corresponding generation Target random number be n₀, and assume that currently adjusting cw size is cw_k, then can be according to cw₀、n₀And cw_k Adjustment target random number n_k, such as n_k=n₀·cw_k/cw₀.Or it is assumed that once adjust currently to enter front After the cw of ecca process of row and target random number, the value of corresponding cw is cw_k-1, corresponding target with Machine number is n_k-1, and assume that currently adjusting cw size is cw_k, then can be according to cw_k-1、n_k-1And cw_kAdjustment Target random number n_k, for example, n_k=n_k-1·cw_k/cw_k-1.Here, above-mentioned it is calculated n_kCan be adjusted to Integer, for example on round.

Have adjusted target random number n_kAfterwards, to the ecca process currently carrying out, note is up to the present Base station has been detected by x idle cca time slot, then,

If x >=n_k, then base station can execute icca.Specifically, base station detects channel idle and holds Continuous time b_iccaAfterwards, base station can be with busy channel.Above-mentioned b_iccaTime may refer to adjust target from base station Random number is n_kMoment t2 after length be b_iccaTime period；Or, if base station the t2 moment just In execution ecca process channel idle is detected, including being in time delay d_eccaIn the range of, or postpone Time reaches d_eccaIn the range of a cca time slot afterwards, then the base station before the t2 moment detects channel The time in space can also calculate in b_iccaWithin time.If channel busy is detected, base station can start newly Ecca process, that is, base station is again according to current cw size cw_kTo produce random number n ' and ecca is set State counter or timer；Or, base station can start new ecca process, and base station is still used random Number n_kEcca state counter or timer are set；Or, base station can also be according to current cw size cw_k, x and n ' or n_kEcca state counter or timer are set, such as so that finding again During n'-xmodn' idle cca time slot, base station can be with busy channel.

Or, if x > and=n_k, base station detects channel idle duration d_eccaAfterwards, base station can take Channel.Above-mentioned d_eccaIt is n that time may refer to from base station adjustment target random number_kMoment t2 after length Spend for d_eccaTime period；Or, if base station is carrying out ecca process in the t2 moment and letter is detected Road idle it is assumed that the t2 moment is in time delay d_eccaIn the range of, then base station is detecting channel when postponing Between d_eccaAfter the interior holding free time, base station can be with busy channel；Assume that the t2 moment is in time delay and reaches d_ecca In the range of a cca time slot afterwards and still idle to t2 moment position channel, then base station can be stood Carve busy channel；Or it is assumed that the t2 moment is in time delay reaches d_eccaA cca time slot afterwards In the range of, then after channel idle is detected in this cca time slot current, base station can be with busy channel.If Channel busy is detected, then base station can start new ecca process, that is, base station is again according to current cw size cw_kTo produce random number n ' and ecca state counter or timer are set；Or, base station can start New ecca process, random number n is still used in base station_kEcca state counter or timer are set；Or Person, base station can also be according to current cw size cw_k, x and n ' or n_kEcca state counter is set Or timer, such as so that when finding n'-xmodn' idle cca time slot again, base station can take Channel.

If x is < n_k, then base station can continue executing with ecca process, and only need to n is detected_k- x empty Not busy cca time slot just can be with busy channel.

2) alternatively, the change according to cw, base station can be adjustment ecca state counter or timer. For example, as shown in figure 15, compared with Figure 13, after base station receives the harq-ack information of data a, Base station can adjust cw according to these new harq-ack information, and base station can just correspondingly change In the ecca state counter of ecca process carrying out or the surplus value of timer, thus base station is according to change The surplus value of the ecca state counter after change or timer continues with ecca process.Above-mentioned ecca State counter or timer are usually to count according to subtraction or timing.

For example, it is assumed that in the ecca process starting currently to carry out, the value of cw is cw₀, and assume to work as Front adjustment cw size is cw_k, the surplus value of note ecca state counter or timer is n, then can root According to cw₀And cw_kAdjustment ecca state counter or timer, the surplus value after note adjustment is n', for example, N'=n cw_k/cw₀.Or it is assumed that after the cw of the front ecca process once adjusting and currently carrying out, The value of corresponding cw is cw_k-1, and assume that currently adjusting cw size is cw_k, then can be according to cw_k-1And cw_k Adjustment ecca state counter or timer, for example, n'=n cw_k/cw_k-1.Here, using ecca shape During state counter, the above-mentioned n' that is calculated can be adjusted to integer, for example on round；Using ecca state During counter, above-mentioned it is calculated the integral multiple that n' can be adjusted to cca slot length.Next, base station Ecca mistake can be continued with according to surplus value n' of the ecca state counter after change or timer Journey.

Embodiment five

On exempting from licensed band, after the execution lbt operation of lte equipment busy channel, the time of its busy channel It is necessarily less than equal to maximum holding time.Lte equipment discharges channel, and restarts lbt process, thus can To coexist with other equipment.Here, the maximum holding time of equipment can be had with the size of competition window (cw) Close.According to Europe with regard to exempting from the regulation of licensed band, the size of note cw is q, the span of q be from 4 to 32, then equipment can be with the maximum time length of busy channel equal to t_max=(13/32) q.

Method to Fig. 3 of the present invention, the size of the cw of lte equipment can be change.For example, according to next From the feedback of ue or the detection of base station, can semi-static or dynamic adjustment cw size.To semi-static tune The situation of whole cw, can be to determine maximum channel holding time according to the cw that this is semi-statically configured.Right The dynamic situation adjusting cw can be minimum of a value cwmin according to cw excursion to determine maximum channel Holding time.Specifically it is assumed that according to from the feedback of ue or the detection of base station, exponentially The window of change cw, the minimum of a value of its excursion and maximum are designated as cwmin and cwmax, then respectively Can be minimum of a value cwmin according to cw excursion to determine maximum channel holding time.

Here it is possible to maximum channel holding time is obtained using the formula of Europe regulation, that is, t_max=(13/32) cw, wherein cw refer to the value of cw being semi-statically configured, or cw dynamic range Minimum of a value cwmin.Or, when cca slot length slottime is different from Europe regulation, can be to above Formula change proportionally.For example, t_max=(13/32) cw slottime/20.Or, it would however also be possible to employ other Method determines maximum channel holding time according to cw, and the present invention is not limited.

Corresponding to said method, present invention also provides a kind of equipment, as shown in figure 16, this sets its composition structure Standby inclusion: parameter determination module and channel detection module；Wherein:

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Within god and principle, any modification, equivalent substitution and improvement done etc., should be included in the scope of protection of the invention Within.

Claims

1. a kind of method of competitive channel resource is it is characterised in that include:

2. method according to claim 1 is it is characterised in that exempt from a carrier wave a of licensed band to one, The condition of described execution icca include following any one or more:

3. method according to claim 2 is it is characterised in that the described event leading to carry out data transmission Including following any one or more:

The time period of the second device transmission signal；

The free time section of network configuration；

The measurement interval of the first equipment.

4. method according to claim 2 is it is characterised in that described first equipment execution icca process is also wrapped Include:

5. method according to claim 1 is it is characterised in that exempt from a carrier wave a of licensed band to one, Execution ecca process includes:

6. method according to claim 5 is it is characterised in that the method also includes:

If 7. method according to claim 5 is it is characterised in that the first equipment is terminating a channel occupancy Afterwards, start to execute ecca process, and in described time t_minWithin will occur described in lead to carry out data transmission Event, the method also includes:

8. the method according to any one of claim 2 to 5 is it is characterised in that exempt from the one of licensed band to one Individual carrier wave a, described execution ecca includes:

9. the method according to any one of claim 1 to 7 it is characterised in that:

The described parameter carrying out lbt operation includes: competition window cw；

10. method according to claim 9 is it is characterised in that described adjustment currently ongoing ecca The ecca state counter of process or timer include:

If in the ecca process starting currently to carry out, the value of cw is cw₀, the corresponding target producing with Machine number is n₀, and the cw size after assuming currently to adjust is cw_k, then adjusting target random number is n_k=n₀·cw_k/cw₀；Or,

11. methods according to claim 10 are it is characterised in that remember that up to the present the first equipment is after testing To x idle cca time slot, described execution ecca includes:

12. methods according to claim 9 are it is characterised in that described adjustment currently ongoing ecca The ecca state counter of process or timer include:

13. methods according to any one of claim 1 to 7 it is characterised in that:

The described parameter carrying out lbt operation includes: cw；

A kind of 14. equipment are it is characterised in that include: parameter determination module and channel detection module；Wherein: