CN105338651A

CN105338651A - Channel detection method equipped with defer period and device thereof

Info

Publication number: CN105338651A
Application number: CN201510624066.2A
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: 2015-09-25
Filing date: 2015-09-25
Publication date: 2016-02-17
Also published as: WO2017049719A1

Abstract

The invention provides a channel detection method equipped with defer period and a device thereof. The channel detection method equipped with the defer period comprises the steps that when the ECCA detection process is performed, the defer period process is configured after channel busy ECCA detection slots are detected; and when the ECCA channel detection process is started, a random number is selected and the value of the random number is adjusted according to the detection result of each ECCA detection slot and the detection result of CCA detection slots in the defer period process in the subsequent channel detection process until the value of the random number is 0, and the ECCA detection process is determined to be ended. According to the technical scheme, the progressive decreasing method of the value of the random number N in the ECCA detection process equipped with the defer period is clear, and the counting method of channel busy and idle times in the defer period is also clear when observation window has the defer period process so that adjustment of the value of a contention window is facilitated.

Description

Be configured with channel detection method and the device of defer period

Technical field

The present invention relates to communication technical field, in particular to channel detection method and a kind of Channel Detection device being configured with deferperiod of a kind of deferperiod of being configured with.

Background technology

At present, 3GPP proposes the concept of LAA (the auxiliary access of LTEAssistedAccess, LTE), for authorizing the help of frequency spectrum to use unlicensed spectrum by LTE.And LTE (LongTermEvolution, Long Term Evolution) network is when using unauthorized frequency range, one of topmost key point guarantees that LAA 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 (ListenBeforeTalk, listem-before-talk) to carry out collision free, in order to better coexist with Wi-Fi, LTE system 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, propose a kind of based on LBE (Loadbasedequipment in correlation technique, equipment based on load) LBT mechanism, as shown in Figure 1: the LBT mechanism based on LBE is aperiodic, as long as business arrives, then trigger CCA to detect, if CCA detects idle, 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, and wherein, q is the length of competition window, and its span is 4 to 32.Fig. 1 shows the situation of q=16, and now, when channel idle being detected, the maximum holding time of channel is (13/32) × q=6.5ms.After 6.5ms, taking ECCA (i.e. ExtendedCCA) mechanism, is namely also random value N, the scope of N is 1 to q, 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 ICCA (initialCCA) and the value of ECCA, and wherein, first time CCA detects and is called ICCA, and 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.Meanwhile, as shown in Figure 2, in Channel Detection, if channel busy detected, then will increase a deferperiod (time of delay), the value of this deferperiod is suitable with the value of initialCCA, that is again channel idle must be detected for a long time, could N-1 be continued.

In fact the concrete time span of deferperiod process and ECCA process is all unfixed, because in deferperiod process, before the channel idle duration reaches deferperiod duration, when channel busy or channel idle duration may be had to be shorter than deferperiod duration, these are all in deferperiod process.Equally, in ECCA, before the ECCAslot (granularity) N number of free time being detected, busy ECCAslot may be detected and detecting that busy also will have the process of deferperiod, so the time span of ECCA process is also unfixed.

Owing to having certain size time each packet arrives, and be in general all need multiple maximum channel holding time just can transfer.As shown in Figure 3, when first packet comes, when namely buffer (buffering area) interior data are grown out of nothing, how first time is arranged based on contention window size initial in the channel competition process of LBE, also there is no clear and definite method at present, and after first time, Channel holding time terminated, in second time channel competition process, how competition window adjusts based on initial competition window and channel current state (channel detection result of such as HARQ feedback or eNB) etc., and detailed method is also uncertain.

For the problems referred to above, propose in correlation technique and can detect channel status based on one period of observing time (as arranged observationwindow), and then according to the number of times of channel busy in observationwindow, or the ratio of channel busy decides sizes values or the adjusted value of competition window.And if for there being the process of deferperiod in observationwindow, how the channel busy number of times in deferperiod process counts, there is no clear and definite method.

Meanwhile, how the Channel Detection busy number of times in deferperiod process calculates in channel idle number of times or channel busy number of times, so that the successively decreasing of random number N value in clear and definite ECCA process, does not also have clear and definite method at present.

Summary of the invention

The present invention based on above-mentioned technical problem one of at least, proposes a kind of Channel Detection scheme being configured with deferperiod newly just, can the clear and definite diminishing method of random number N value in the ECCA testing process being configured with deferperiod.

In view of this, according to a first aspect of the invention, propose a kind of channel detection method being configured with deferperiod, comprising: when carrying out ECCA testing process, after the ECCA detection granularity of channel busy being detected, configure deferperiod process; When opening ECCA channel detection process, choose random number, and in follow-up channel detection process, the testing result detecting granularity according to each ECCA CCA detected in the testing result of granularity and described deferperiod process adjusts the value of described random number, until when the value of described random number is 0, determine that described ECCA testing process terminates.

According to a second aspect of the invention, also proposed a kind of Channel Detection device being configured with deferperiod, comprising: dispensing unit, for when carrying out ECCA testing process, after the ECCA detection granularity of channel busy being detected, configuring deferperiod process; Processing unit, for when opening ECCA channel detection process, choose random number, and in follow-up channel detection process, the testing result detecting granularity according to each ECCA CCA detected in the testing result of granularity and described deferperiod process adjusts the value of described random number, until when the value of described random number is 0, determine that described ECCA testing process terminates.

In technique scheme, owing to adding deferperiod process in ECCA process, and the present invention proposes the technical scheme that the testing result detecting granularity according to each ECCA CCA detected in the testing result of granularity and deferperiod process adjusts random number jointly, namely propose the testing result CCA in deferperiod process being detected granularity to calculate in channel idle number of times or channel busy number of times, specify that the diminishing method of random number N value in ECCA process.

Accompanying drawing explanation

Fig. 1 shows the frame structure schematic diagram of the LBT mechanism based on LBE;

Fig. 2 shows the frame structure schematic diagram of the LBE mechanism including deferperiod process;

Fig. 3 shows the schematic diagram of Competition adjustment window size;

Fig. 4 shows the schematic flow diagram of the channel detection method being configured with deferperiod according to an embodiment of the invention;

Fig. 5 shows the schematic block diagram of the Channel Detection device being configured with deferperiod according to an embodiment of the invention;

Fig. 6 shows the schematic block diagram of base station according to an embodiment of the invention;

Fig. 7 shows the schematic block diagram of terminal 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. 4 shows the schematic flow diagram of the channel detection method being configured with deferperiod according to an embodiment of the invention.

As shown in Figure 4, be configured with the channel detection method of deferperiod according to an embodiment of the invention, comprise:

Step 402, when carrying out ECCA testing process, configures deferperiod process after the ECCA detection granularity of channel busy being detected;

Step 404, when opening ECCA channel detection process, choose random number, and in follow-up channel detection process, the testing result detecting granularity according to each ECCA CCA detected in the testing result of granularity and described deferperiod process adjusts the value of described random number, until when the value of described random number is 0, determine that described ECCA testing process terminates.

In this technical scheme, owing to adding deferperiod process in ECCA process, and the present invention proposes the technical scheme that the testing result detecting granularity according to each ECCA CCA detected in the testing result of granularity and deferperiod process adjusts random number jointly, namely propose the testing result CCA in deferperiod process being detected granularity to calculate in channel idle number of times or channel busy number of times, specify that the diminishing method of random number N value in ECCA process.

In technique scheme, preferably, the step that the testing result detecting granularity according to described each ECCA adjusts the value of described random number specifically comprises: if arbitrary ECCA detects granularity Detection to channel busy, then the value of described random number is constant; If the ECCA outside arbitrary deferperiod process detects granularity Detection to channel idle, then the value of described random number is subtracted 1.

In above-mentioned arbitrary technical scheme, preferably, detect according to the CCA in described deferperiod process the step that the testing result of granularity adjusts the value of described random number specifically to comprise:

At the end of arbitrary described deferperiod process, the value of described random number is subtracted 1; Or

At the end of arbitrary described deferperiod process, using the value that the number that the ECCA in the value of described deferperiod detects granularity reduces as described random number; Or

At the end of arbitrary described deferperiod process, the value that the number that the ECCA of channel idle detects granularity reduces as described random number in described deferperiod testing process, will be detected.

In above-mentioned arbitrary technical scheme, preferably, before carrying out described ECCA testing process, also comprise: the watch window detected channel is set, and detected by the state of described watch window to described channel; Based on the state of the described channel that described watch window detects, determine the value of competition window; According to the value of described competition window, choose described random number.

In this technical scheme, by arranging watch window (observationwindow), channel status is detected, to determine the value of competition window according to the channel status detected, make the value of the competition window arranged can be adapted to the change of channel status, and then suitable random number can be selected, the value avoiding competition window is too small and cause collision, it also avoid value due to competition window excessive and increase the problem of transmission delay, be conducive to the throughput promoting channel utilization and system.

In above-mentioned arbitrary technical scheme, preferably, based on the state of the described channel that described watch window detects, determine that the step of the value of competition window specifically comprises: according to the state of the described channel that described watch window detects, determine the index indicating described channel status, determine the value of described competition window according to described index; Wherein, described finger target value is the number based on detection granularity channel idle being detected in described watch window, and/or determine based on the number of detection granularity channel busy being detected in described watch window.

In this technical scheme, the scheme according to the value of These parameters determination competition window is specially: prestore the corresponding relation between index and the value of competition window, and then determines the value of corresponding competition window according to These parameters; Or according to referring to the relation of critical value of target value and setting, the value of Competition adjustment window, during as referred to that target value is more than or equal to the first critical value, increases the value of competition window, otherwise the value of reduction competition window or the value of competition window is set to minimum value.Or when referring to that target value is less than or equal to the second critical value, increase the value of competition window, otherwise reduce the value of competition window or the value of competition window is set to minimum value.

In above-mentioned arbitrary technical scheme, preferably, deferperiod process is configured with in described watch window, then

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel idle being detected in described watch window is added 0; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel idle being detected in described watch window is added 1; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel idle being detected in described watch window is added M, wherein, M is the number of the ECCA detection granularity in the value of the described deferperiod be configured in described watch window; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel idle being detected in described watch window is added M+1, wherein, M is the number of the ECCA detection granularity in the value of the described deferperiod be configured in described watch window; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel idle being detected in described watch window is added M+2, wherein, M is the number of the ECCA detection granularity in the value of the described deferperiod be configured in described watch window; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel idle being detected in described watch window is added A, wherein, A is configured in detect in the described deferperiod process in described watch window that the ECCA of channel idle detects the number of granularity; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel idle being detected in described watch window is added A+B, wherein, A is configured in detect in the described deferperiod process in described watch window that the ECCA of channel idle detects the number of granularity, and B is configured in the described deferperiod process in described watch window to detect that the non-ECCA of channel idle detects the number of granularity; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel idle being detected in described watch window is added A+2B, wherein, A is configured in detect in the described deferperiod process in described watch window that the ECCA of channel idle detects the number of granularity, and B is configured in the described deferperiod process in described watch window to detect that the non-ECCA of channel idle detects the number of granularity.

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel busy being detected in described watch window is added 0; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel busy being detected in described watch window is added 1; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel busy being detected in described watch window is added A, wherein, A is configured in detect in the described deferperiod process in described watch window that the ECCA of channel busy detects the number of granularity; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel busy being detected in described watch window is added A+B, wherein, A is configured in detect in the described deferperiod process in described watch window that the ECCA of channel busy detects the number of granularity, and B is configured in the described deferperiod process in described watch window to detect that the non-ECCA of channel busy detects the number of granularity; Or

At the end of arbitrary deferperiod process in described watch window, the number of detection granularity channel busy being detected in described watch window is added A+2B, wherein, A is configured in detect in the described deferperiod process in described watch window that the ECCA of channel busy detects the number of granularity, and B is configured in the described deferperiod process in described watch window to detect that the non-ECCA of channel busy detects the number of granularity.

Three kinds of processes of the deferperiod that the present invention proposes below are described:

Process one:

In above-mentioned arbitrary technical scheme, preferably, described deferperiod process specifically comprises: perform the channel detection process that first detects granularity; If the described first channel detection process detecting granularity detects channel idle, then perform the channel detection process that ECCA detects granularity; When the channel detection process that described ECCA detects granularity detects channel busy, re-execute the channel detection process that described first detects granularity, and when the channel detection process that described ECCA detects granularity detects channel idle, judge whether that the channel detection process of M continuous print ECCA detection granularity all detects channel idle; When the channel detection process being determined with M continuous print ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continue to perform the channel detection process that described ECCA detects granularity.

This process is specially, and must be that continuous print one first detects the channel detection process that the channel detection process of granularity and M ECCA detect granularity and all channel idle detected, could determine that deferperiod process terminates.

Process two:

In above-mentioned arbitrary technical scheme, preferably, described deferperiod process specifically comprises: perform the channel detection process that first detects granularity; If the described first channel detection process detecting granularity detects channel idle, then perform the channel detection process that ECCA detects granularity; Judge whether that the channel detection process of M ECCA detection granularity all detects channel idle; When the channel detection process being determined with M ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continue to perform the channel detection process that described ECCA detects granularity.

This process is specially, and after the first channel detection process detecting granularity detects channel idle, as long as the channel detection process having M ECCA to detect granularity (without the need to continuously) detects channel idle, just determines that deferperiod process terminates.

Process three:

In above-mentioned arbitrary technical scheme, preferably, described deferperiod process specifically comprises: perform the channel detection process that first detects granularity; If the described first channel detection process detecting granularity detects channel idle, then perform the channel detection process that ECCA detects granularity; Judge whether that the channel detection process of M continuous print ECCA detection granularity all detects channel idle; When the channel detection process being determined with M continuous print ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continue to perform the channel detection process that described ECCA detects granularity.

This process is specially, and after the first channel detection process detecting granularity detects channel idle, when the channel detection process having M continuous print ECCA to detect granularity detects channel idle, determines that deferperiod process terminates.

The first above-mentioned detection granularity can be 16us.

Fig. 5 shows the schematic block diagram of the Channel Detection device being configured with deferperiod according to an embodiment of the invention.

As shown in Figure 5, be configured with the Channel Detection device 500 of deferperiod according to an embodiment of the invention, comprise: dispensing unit 502 and processing unit 504.

Wherein, dispensing unit 502, for when carrying out ECCA testing process, configures deferperiod process after the ECCA detection granularity of channel busy being detected; Processing unit 504, for when opening ECCA channel detection process, choose random number, and in follow-up channel detection process, the testing result detecting granularity according to each ECCA CCA detected in the testing result of granularity and described deferperiod process adjusts the value of described random number, until when the value of described random number is 0, determine that described ECCA testing process terminates.

In technique scheme, preferably, described processing unit 504 performs the operation that the testing result detecting granularity according to described each ECCA adjusts the value of described random number and specifically comprises: if arbitrary ECCA detects granularity Detection to channel busy, then the value of described random number is constant; If the ECCA outside arbitrary deferperiod process detects granularity Detection to channel idle, then the value of described random number is subtracted 1.

In above-mentioned arbitrary technical scheme, preferably, described processing unit 504 performs and detects according to the CCA in described deferperiod process the operation that the testing result of granularity adjusts the value of described random number and specifically comprise:

In above-mentioned arbitrary technical scheme, preferably, also comprise: setting unit 506, for before carrying out described ECCA testing process, the watch window detected channel is set, and detected by the state of described watch window to described channel; Determining unit 508, for the state of described channel detected based on described watch window, determines the value of competition window; Described processing unit 504 specifically for, according to the value of described competition window, choose described random number.

In above-mentioned arbitrary technical scheme, preferably, described determining unit 508 specifically for: according to the state of the described channel that described watch window detects, determine the index indicating described channel status, determine the value of described competition window according to described index; Wherein, described finger target value is the number based on detection granularity channel idle being detected in described watch window, and/or determine based on the number of detection granularity channel busy being detected in described watch window.

In above-mentioned arbitrary technical scheme, preferably, described deferperiod is configured with in described watch window, then

Process one:

In above-mentioned arbitrary technical scheme, preferably, described processing unit 504 also for performing described deferperiod process, specifically comprises:

First performance element 504A, for performing the channel detection process of the first detection granularity, and when the channel detection process that described first detects granularity detects channel idle, perform the channel detection process that ECCA detects granularity, and for when the channel detection process that described ECCA detects granularity detects channel busy, re-execute the channel detection process that described first detects granularity; First judging unit 504B, for when the channel detection process that described ECCA detects granularity detects channel idle, judge whether that the channel detection process of M continuous print ECCA detection granularity all detects channel idle, when the channel detection process being determined with M continuous print ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continued to perform the channel detection process that described ECCA detects granularity by described first performance element 504A.

Process two:

In above-mentioned arbitrary technical scheme, preferably, described processing unit 504 is also for performing described deferperiod process, specifically comprise: the second performance element 504C, for performing the channel detection process of the first detection granularity, and when the channel detection process that described first detects granularity detects channel idle, perform the channel detection process that ECCA detects granularity; Second judging unit 504D, for judging whether that the channel detection process of M ECCA detection granularity all detects channel idle, when the channel detection process being determined with M ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continued to perform the channel detection process that described ECCA detects granularity by described second performance element 504C.

Process three:

In above-mentioned arbitrary technical scheme, preferably, described processing unit 504 is also for performing described deferperiod process, specifically comprise: the 3rd performance element 504E, for performing the channel detection process of the first detection granularity, and for when the channel detection process that described first detects granularity detects channel idle, perform the channel detection process that ECCA detects granularity; 3rd judging unit 504F, for judging whether that the channel detection process of M continuous print ECCA detection granularity all detects channel idle, when the channel detection process being determined with M continuous print ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continued to perform the channel detection process that described ECCA detects granularity by described 3rd performance element 504E.

The first above-mentioned detection granularity can be 16us.

Fig. 6 shows the schematic block diagram of base station according to an embodiment of the invention.

As shown in Figure 6, base station 600 according to an embodiment of the invention, comprising: the Channel Detection device 500 being configured with deferperiod as shown in Figure 5.

As shown in Figure 7, terminal 700 according to an embodiment of the invention, comprising: the Channel Detection device 500 being configured with deferperiod as shown in Figure 5.

Technical scheme of the present invention is described in detail below with specific embodiment.

Technical scheme of the present invention is mainly in order to solve: how the channel detection result in deferperiod process calculates in channel idle number of times or channel busy number of times, so that the successively decreasing of random number N value in clear and definite ECCA process, and clearly determine contention window value size or adjustment time desired value (metric) time, how slot (granularity) number in deferperiod process counts, thus makes the deterministic process of ECCA process and contention window value clearer and more definite.

For in deferperiod process, how deferperiod window defines, and provides as follows: the value=16us+M × ECCAslot of Deferperiod.Namely in deferperiod process, Channel Detection granularity has two kinds, and one is 16us, and one is ECCAslot (as 9us), is 9us below for example is described with ECCAslot.

One, three kinds of deferperiod processes of the present invention's proposition are as follows:

Process one:

When Deferperiod process starts, first Channel Detection granularity is 16us, until when detecting that the channel idle duration reaches 16us, just starts the Channel Detection that Channel Detection granularity is 9us.Following is that granularity carries out Channel Detection with 9us, if channel busy detected, then restarts to be that granularity detects with 16us; If channel idle detected, then judged whether that a continuous N 9us is channel idle, if not, then continue to detect with 9us, if so, then deferperiod terminates.

Process two:

When Deferperiod process starts, first Channel Detection granularity is 16us, until when detecting that the channel idle duration reaches 16us, just starts the Channel Detection that Channel Detection granularity is 9us.Next be that granularity carries out Channel Detection with 9us, no matter channel busy, as long as the 9us that have detected M free time after an idle 16us, then deferperiod process terminates.

Process three:

When Deferperiod process starts, first Channel Detection granularity is 16us, until when detecting that the channel idle duration reaches 16us, just starts the Channel Detection that Channel Detection granularity is 9us.Following is that granularity carries out Channel Detection with 9us, if channel busy detected, then continues to be that granularity detects with 9us; If channel idle detected, then judged whether that a continuous N 9us is channel idle, if not, then continue to detect with 9us, if so, then deferperiod terminates.

Wherein, process three and the difference of process one are that M 9us of idle 16us and continuous idle is discontinuous; Process three and the difference of process two are that M idle 9us is continuous print.

Two, for the deferperiod process in ECCA process, the channel idle in deferperiod process counts in the number of channel idle, and that is at the end of deferperiod process, N value is successively decreased.Specifically there is following several decreasing fashion:

1, N value successively decreases 1.

2, the number that N value is successively decreased is the number of ECCAslot in deferperiod value.If deferperiod value is 34us, when being fixed value 16us+2 × ECCAslot (9us), N value successively decreases 2; Certainly, the value of deferperiod may not be also 34us, is 16us+M × ECCAslot, and so N value is successively decreased M.

3, the number that N value is successively decreased is in deferperiod process, the number of the ECCAslot of channel idle detected, even if namely the channel idle duration does not reach deferperiod duration, when such as only having an ECCAslot to detect channel idle, N value is also successively decreased.

As deferperiod value be 34us time, process duration in deferperiod mode one is 16us (spare time)+9us (spare time)+9us (hurrying)+16us (hurrying)+16us (spare time)+9us (spare time)+9us (spare time), because there are three 9us to detect channel idle in process, then N value successively decreases 3.

As deferperiod value be 34us time, process duration in deferperiod mode two is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (hurrying)+9us (spare time), because there be twice 9us to detect channel idle in process, then N value successively decreases 2.

As deferperiod value be 34us time, process duration in deferperiod mode three is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (spare time)+9us (spare time), because there are three 9us to detect channel idle in process, then N value successively decreases 3.

Three, in the inventive solutions, be provided with the watch window (periodicity or aperiodicity) that channel is detected, and the state of the channel detected based on watch window, determine the index (metric) indicating described channel status, and then the value of competition window is determined according to the index determined, the random number of carrying out in ECCA testing process successively decreasing then is chosen at according to the value of competition window.

Wherein, the value of These parameters comprises: the ratio of the first reference value or the first reference value and the second reference value; Wherein, described first reference value comprises: the time hop count (if continuous multiple slot is busy, being then called a time hop count) channel busy being detected in the number of detection granularity channel idle being detected in the number of the detection granularity of channel busy, watch window, watch window detected in watch window; Second reference value comprises: the number sum detection granularity of channel busy being detected in the number of the detection granularity of channel idle and watch window detected in detection time of watch window, watch window.

(1) if for when there is deferperiod in the observationwindow for contention window value setting or adjustment, in deferperiod process, how channel idle participates in the counting how many times of the channel idle slot of metric (index):

1, at the end of a deferperiod process, the number of times of channel idle slot increases to 0.

2, at the end of a deferperiod process, the number of times of channel idle slot increases to 1.

3, at the end of a deferperiod process, the number of times added value of channel idle slot is the number M that in deferperiod value, ECCA detects granularity.As for deferperiod mode one and mode three, only calculate M 9us in the continuous idle time.

3, at the end of a deferperiod process, the number of times added value of channel idle slot is the number M+1 that in deferperiod value, ECCA detects granularity, wherein, using detecting that idle 16us is as 1 free time.As for deferperiod mode one and mode three, only calculate M 9us and 1 16us in the continuous idle time.

4, at the end of a deferperiod process, the number of times added value of channel idle slot is the number M+2 that in deferperiod value, ECCA detects granularity, wherein, using detecting that idle 16us is as 2 free time.

5, at the end of a deferperiod process, in this process, detect that the number of the ECCAslot of channel idle is the number of times added value of slot channel idle being detected.

As deferperiod value be 34us time, process duration in deferperiod mode one is 16us (spare time)+9us (spare time)+9us (hurrying)+16us (hurrying)+16us (spare time)+9us (spare time)+9us (spare time), because there are three 9us to detect channel idle in process, therefore the number of times of channel idle slot increases by 3.

As deferperiod value be 34us time, process duration in deferperiod mode two is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (hurrying)+9us (spare time), because there be twice 9us to detect channel idle in process, therefore the number of times of channel idle slot increases by 2.

As deferperiod value be 34us time, process duration in deferperiod mode three is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (spare time)+9us (spare time), because there are three 9us to detect channel idle in process, therefore the number of times of channel idle slot increases by 3.

6, at the end of a deferperiod process, the number that the number of times that in this process, the number of ECCAslot (9us) of channel idle and the number sum of 16us are channel idle slot increases.

As deferperiod value be 34us time, process duration in deferperiod mode one is 16us (spare time)+9us (spare time)+9us (hurrying)+16us (hurrying)+16us (spare time)+9us (spare time)+9us (spare time), because there are three 9us and twice 16us to detect channel idle in process, therefore the number of times of channel idle slot increases by 5.

As deferperiod value be 34us time, process duration in deferperiod mode two is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (hurrying)+9us (spare time), because there be a twice 9us and 16us to detect channel idle in process, therefore the number of times of channel idle slot increases by 3.

As deferperiod value be 34us time, process duration in deferperiod mode three is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (spare time)+9us (spare time), because there be three times 9us and time 16us to detect channel idle in process, therefore the number of times of channel idle slot increases by 4.

7, at the end of a deferperiod process, the number that the number of times that in this process, the number of the ECCAslot of channel idle and number × 2 sum of 16us are channel idle slot increases.

As deferperiod value be 34us time, process duration in deferperiod mode one is 16us (spare time)+9us (spare time)+9us (hurrying)+16us (hurrying)+16us (spare time)+9us (spare time)+9us (spare time), because there are three 9us and twice 16us to detect channel idle in process, therefore the number of times of channel idle slot increases 3+2 × 2=7.

As deferperiod value be 34us time, process duration in deferperiod mode two is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (hurrying)+9us (spare time), because there be a twice 9us and 16us to detect channel idle in process, therefore the number of times of channel idle slot increases 2+1 × 2=4.

As deferperiod value be 34us time, process duration in deferperiod mode three is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (spare time)+9us (spare time), because there be three times 9us and time 16us to detect channel idle in process, therefore the number of times of channel idle slot increases 3+1 × 2=5.

(2) if for when there is deferperiod in the observationwindow for contention window value setting or adjustment, in deferperiod process, how channel busy participates in the counting how many times of the channel idle slot of metric (index):

1, at the end of a deferperiod process, the number of times of channel busy slot increases to 0.

2, at the end of a deferperiod process, the number of times of channel busy slot increases to 1.

3, at the end of a deferperiod process, in this process, detect that the number of the ECCAslot of channel busy is the number of times added value of slot channel busy being detected.

As deferperiod value be 34us time, process duration in deferperiod mode one is 16us (spare time)+9us (spare time)+9us (hurrying)+16us (hurrying)+16us (spare time)+9us (spare time)+9us (spare time), because once 9us detects channel busy in process, therefore the number of times of channel busy slot increases by 1.

As deferperiod value be 34us time, process duration in deferperiod mode two is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (hurrying)+9us (spare time), because there be twice 9us to detect channel busy in process, therefore the number of times of channel busy slot increases by 2.

As deferperiod value be 34us time, process duration in deferperiod mode three is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (spare time)+9us (spare time), because once 9us detects channel busy in process, therefore the number of times of channel busy slot increases by 1.

4, at the end of a deferperiod process, the number that the number of times that the number of ECCAslot (9us) of channel busy and the number sum of 16us are channel busy slot increases in this process, is detected.

As deferperiod value be 34us time, process duration in deferperiod mode one is 16us (spare time)+9us (spare time)+9us (hurrying)+16us (hurrying)+16us (spare time)+9us (spare time)+9us (spare time), because once a 9us and 16us detects channel busy in process, therefore the number of times of channel busy slot increases by 2.

As deferperiod value be 34us time, process duration in deferperiod mode two is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (hurrying)+9us (spare time), because there be twice 9us and 0 16us to detect channel busy in process, therefore the number of times of channel busy slot increases by 2.

As deferperiod value be 34us time, process duration in deferperiod mode three is 16us (spare time)+9us (spare time)+9us (hurrying)+9us (spare time)+9us (spare time), because once 9us and 0 16us detects channel busy in process, therefore the number of times of channel busy slot increases by 1.

7, at the end of a deferperiod process, the number that the number of times that the number of the ECCAslot of channel busy and number × 2 sum of 16us are channel busy slot increases in this process, is detected.

As deferperiod value be 34us time, process duration in deferperiod mode one is 16us (spare time)+9us (spare time)+9us (hurrying)+16us (hurrying)+16us (spare time)+9us (spare time)+9us (spare time), because once a 9us and 16us detects channel busy in process, therefore the number of times of channel busy slot increases 1+1 × 2=3.

For above method of counting, thinking that the denominator of metric is that CCAslot number may be improper, is directly that the time span of observationwindow is more suitable.If observationwindow is just in time multiple ECCAslot, that is in fact the same with CCAslot number meaning.If but inside observationwindow, comprised the various length of ICCA, deferperiod, ECCAslot, then just directly could not embody time span by the words of CCAslot number, at this time use the time span of observationwindow more suitable.

Such scheme of the present invention proposes in deferperiod process, the diminishing method of random number N value.And if have deferperiod process in the observationwindow determined for contention window size value or adjust, how the slot proposing the channel busy in deferperiod process participates in the counting of metric, thus metric is calculated definitely, be conducive to determination or the adjustment of contention window value.

More than be described with reference to the accompanying drawings technical scheme of the present invention, the present invention proposes a kind of Channel Detection scheme being configured with deferperiod newly, specify that the diminishing method of random number N value in the ECCA testing process being configured with deferperiod, when having deferperiod process in observationwindow simultaneously, also specify that the method for counting of channel busy number of times in deferperiod process, so that the adjustment to competition window.

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. be configured with a channel detection method of deferperiod, it is characterized in that, comprising:

When carrying out ECCA testing process, after the ECCA detection granularity of channel busy being detected, configure deferperiod process;

When opening ECCA channel detection process, choose random number, and in follow-up channel detection process, the testing result detecting granularity according to each ECCA CCA detected in the testing result of granularity and described deferperiod process adjusts the value of described random number, until when the value of described random number is 0, determine that described ECCA testing process terminates.

2. the channel detection method being configured with deferperiod according to claim 1, is characterized in that, the step adjusting the value of described random number according to the testing result of described each ECCA detection granularity specifically comprises:

If arbitrary ECCA detects granularity Detection to channel busy, then the value of described random number is constant;

If the ECCA outside arbitrary deferperiod process detects granularity Detection to channel idle, then the value of described random number is subtracted 1.

3. the channel detection method being configured with deferperiod according to claim 1, is characterized in that, the step adjusting the value of described random number according to the testing result of the CCA detection granularity in described deferperiod process specifically comprises:

4. the channel detection method being configured with deferperiod according to claim 1, is characterized in that, before carrying out described ECCA testing process, also comprises:

The watch window detected channel is set, and is detected by the state of described watch window to described channel;

Based on the state of the described channel that described watch window detects, determine the value of competition window;

According to the value of described competition window, choose described random number.

5. the channel detection method being configured with deferperiod according to claim 4, is characterized in that, based on the state of the described channel that described watch window detects, determines that the step of the value of competition window specifically comprises:

According to the state of the described channel that described watch window detects, determine the index indicating described channel status, determine the value of described competition window according to described index;

Wherein, described finger target value is the number based on detection granularity channel idle being detected in described watch window, and/or determine based on the number of detection granularity channel busy being detected in described watch window.

6. the channel detection method being configured with deferperiod according to claim 5, is characterized in that, is configured with deferperiod process, then in described watch window

7. the channel detection method being configured with deferperiod according to claim 5, is characterized in that, is configured with deferperiod process, then in described watch window

8. the channel detection method being configured with deferperiod according to any one of claim 1 to 7, is characterized in that, described deferperiod process specifically comprises:

Perform the channel detection process that first detects granularity;

If the described first channel detection process detecting granularity detects channel idle, then perform the channel detection process that ECCA detects granularity;

When the channel detection process that described ECCA detects granularity detects channel busy, re-execute the channel detection process that described first detects granularity, and when the channel detection process that described ECCA detects granularity detects channel idle, judge whether that the channel detection process of M continuous print ECCA detection granularity all detects channel idle;

When the channel detection process being determined with M continuous print ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continue to perform the channel detection process that described ECCA detects granularity.

9. the channel detection method being configured with deferperiod according to any one of claim 1 to 7, is characterized in that, described deferperiod process specifically comprises:

Perform the channel detection process that first detects granularity;

Judge whether that the channel detection process of M ECCA detection granularity all detects channel idle;

When the channel detection process being determined with M ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continue to perform the channel detection process that described ECCA detects granularity.

10. the channel detection method being configured with deferperiod according to any one of claim 1 to 7, is characterized in that, described deferperiod process specifically comprises:

Perform the channel detection process that first detects granularity;

Judge whether that the channel detection process of M continuous print ECCA detection granularity all detects channel idle;

11. 1 kinds of Channel Detection devices being configured with deferperiod, is characterized in that, comprising:

Dispensing unit, for when carrying out ECCA testing process, configures deferperiod process after the ECCA detection granularity of channel busy being detected;

Processing unit, for when opening ECCA channel detection process, choose random number, and in follow-up channel detection process, the testing result detecting granularity according to each ECCA CCA detected in the testing result of granularity and described deferperiod process adjusts the value of described random number, until when the value of described random number is 0, determine that described ECCA testing process terminates.

The 12. Channel Detection devices being configured with deferperiod according to claim 11, is characterized in that, the operation that described processing unit execution adjusts the value of described random number according to the testing result that described each ECCA detects granularity specifically comprises:

The 13. Channel Detection devices being configured with deferperiod according to claim 11, it is characterized in that, the operation that described processing unit execution adjusts the value of described random number according to the testing result of the CCA detection granularity in described deferperiod process specifically comprises:

The 14. Channel Detection devices being configured with deferperiod according to claim 11, is characterized in that, also comprise:

Setting unit, for before carrying out described ECCA testing process, arranges the watch window detected channel, and is detected by the state of described watch window to described channel;

Determining unit, for the state of described channel detected based on described watch window, determines the value of competition window;

Described processing unit specifically for, according to the value of described competition window, choose described random number.

The 15. Channel Detection devices being configured with deferperiod according to claim 14, is characterized in that, described determining unit specifically for:

The 16. Channel Detection devices being configured with deferperiod according to claim 15, is characterized in that, be configured with deferperiod process, then in described watch window

The 17. Channel Detection devices being configured with deferperiod according to claim 15, is characterized in that, be configured with deferperiod process, then in described watch window

18., according to claim 11 to the Channel Detection device being configured with deferperiod according to any one of 17, is characterized in that, described processing unit also for performing described deferperiod process, specifically comprises:

First performance element, for performing the channel detection process of the first detection granularity, and when the channel detection process that described first detects granularity detects channel idle, perform the channel detection process that ECCA detects granularity, and for when the channel detection process that described ECCA detects granularity detects channel busy, re-execute the channel detection process that described first detects granularity;

First judging unit, for when the channel detection process that described ECCA detects granularity detects channel idle, judge whether that the channel detection process of M continuous print ECCA detection granularity all detects channel idle, when the channel detection process being determined with M continuous print ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continued to perform the channel detection process that described ECCA detects granularity by described first performance element.

19., according to claim 11 to the Channel Detection device being configured with deferperiod according to any one of 17, is characterized in that, described processing unit also for performing described deferperiod process, specifically comprises:

Second performance element, for performing the channel detection process of the first detection granularity, and when the channel detection process that described first detects granularity detects channel idle, performs the channel detection process that ECCA detects granularity;

Second judging unit, for judging whether that the channel detection process of M ECCA detection granularity all detects channel idle, when the channel detection process being determined with M ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continued to perform the channel detection process that described ECCA detects granularity by described second performance element.

20., according to claim 11 to the Channel Detection device being configured with deferperiod according to any one of 17, is characterized in that, described processing unit also for performing described deferperiod process, specifically comprises:

3rd performance element, for performing the channel detection process of the first detection granularity, and for when the channel detection process that described first detects granularity detects channel idle, performs the channel detection process that ECCA detects granularity;

3rd judging unit, for judging whether that the channel detection process of M continuous print ECCA detection granularity all detects channel idle, when the channel detection process being determined with M continuous print ECCA detection granularity all detects channel idle, determine that described deferperiod process terminates, otherwise, continued to perform the channel detection process that described ECCA detects granularity by described 3rd performance element.