CN105025588A - WLAN channel access method, associated equipment and system - Google Patents
WLAN channel access method, associated equipment and system Download PDFInfo
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- CN105025588A CN105025588A CN201410387153.6A CN201410387153A CN105025588A CN 105025588 A CN105025588 A CN 105025588A CN 201410387153 A CN201410387153 A CN 201410387153A CN 105025588 A CN105025588 A CN 105025588A
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Abstract
The embodiment of the invention discloses a WLAN channel access method, which comprises the steps of: determining number of associated station equipment; generating enhanced distributed channel access parameters, wherein minimum contention windows and maximum contention windows corresponding to access service types in the enhanced distributed channel access parameters are generated according to the number of the associated station equipment; and sending the enhanced distributed channel access parameters to the associated station equipment. The invention further disclosed access point equipment, the station equipment and a wireless communication system. By adopting the WLAN channel access method, the associated equipment and the system, the contention retreat windows generated by the STAs during the channel accessing process are effectively reduced, the technical problems that the waiting time consumption of the retreat windows generated by a random retreat mechanism accessing the network in the prior art is high and large amounts of unnecessary channel resources are wasted are solved, and the utilization efficiency of frequency spectrum is greatly improved.
Description
Technical field
The present invention relates to the communications field, particularly relate to the method for a kind of WLAN access channel, relevant device and system.
Background technology
Along with the progress of ICT (information and communication technology), various wireless communication technology is developed recently.In the middle of these wireless communication technologys, WLAN (wireless local area network) (WLAN) is that one can by the technology using portable terminal (such as intelligent mobile terminal, panel computer, portable media player etc.) wirelessly to surf the Net in family or enterprise or in the region providing special services.
Current, 802.11 protocol groups have set up the seminar of Wi-Fi technology of future generation---efficient WLAN (wireless local area network) (High Efficiency WLAN, HEW), and to improve the utilization ratio of frequency spectrum.In prior art as shown in Fig. 1 and Fig. 2, Wi-Fi accesses the emulation schematic diagram of the random backoff mechanism of channel, in FIG as a Basic Service Set (Basic Service Set, BSS) website (Stations in, STAs) when quantity is increased to 50 from 1, competition window (Contention Window, CW) quantity drops to 3 from 8, and when the quantity of STAs is increased to 200 from 50, the quantity of CW drops to 2.5 from 3; And in fig. 2 when the quantity of STAs is increased to 20 from 1, medium access control (Media Access Control, MAC) decrease in efficiency 9%, when the quantity of STAs is increased to 50 from 20, MAC efficiency reduces 4%.Therefore, the backoff window stand-by period expense utilizing random backoff mechanism access network of the prior art to produce is very large, wastes much unnecessary channel resource.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, method, relevant device and system that a kind of WLAN accesses channel are provided, by the quantity according to the described site apparatus associated, generate and strengthen distributed channel access parameter, decrease the competition backoff window that STAs produces in access channel procedure, improve the utilization ratio of frequency spectrum.
First aspect, embodiments provides the method for a kind of WLAN access channel, comprising:
Determine the quantity of the site apparatus associated;
According to the quantity of the described site apparatus associated, generate and strengthen distributed channel access parameter; The minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Described enhancing distributed channel access parameter is sent to the described site apparatus associated.
In conjunction with first aspect, in the implementation that the first is possible, the quantity of the site apparatus associated described in described basis, generates enhancing distributed channel access parameter and comprises:
According to the quantity of the described site apparatus associated, minimum competition window exponential form and maximum contention window exponential form that in described enhancing distributed channel access parameter, each access service types is corresponding are set;
By minimum competition window exponential form and the maximum contention window exponential form of setting, calculate minimum competition window corresponding to each access service types described and maximum contention window.
In conjunction with the first possible implementation of first aspect, in the implementation that the second is possible, the quantity of the site apparatus associated described in described basis, arranges minimum competition window exponential form that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window exponential form comprises:
Whether the quantity of the site apparatus associated described in judgement reaches the first predetermined threshold value;
When judged result is no, arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When judged result is for being, arranging described minimum competition window exponential form is the 3rd default value, and arranging described maximum contention window exponential form is the 4th default value.
In conjunction with the first possible implementation of first aspect, in the implementation that the third is possible, the quantity of the site apparatus associated described in described basis, arranges minimum competition window exponential form that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window exponential form comprises:
Whether the quantity of the site apparatus associated described in judgement reaches the first predetermined threshold value;
When judged result is no, arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When judged result is for being, whether the quantity of the site apparatus associated described in checking reaches the second predetermined threshold value;
When checking that result is no, arranging described minimum competition window exponential form is the 5th default value, and arranging described maximum contention window exponential form is the 6th default value; When checking result for being, arranging described minimum competition window exponential form is the 7th default value, and arranging described maximum contention window exponential form is the 8th default value.
In conjunction with first aspect, or the first possible implementation of first aspect, or the implementation that the second of first aspect is possible, or the third possible implementation of first aspect, in the 4th kind of possible implementation, described to after the described site apparatus associated sends described enhancing distributed channel access parameter, also comprise:
Described in the process of carrying out random back at website, website clashes again, and when needing to expand current competitive window, whether the quantity of the site apparatus associated described in detection reaches the 3rd predetermined threshold value;
When the test results is yes, current competitive window is expanded 1 times and subtract 1 again to form new Stochastic choice region for described website Stochastic choice;
When testing result is no, expands algorithm by adopting the competition window preset and current competitive window is expanded, to form new Stochastic choice region for described website Stochastic choice; Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
In conjunction with the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation, describedly send described enhancing distributed channel access parameter to the described site apparatus associated and comprise:
Send to the website associated in the process of probing response frame, described in the described website clean culture associated, strengthen distributed channel access parameter; Or
Send to the website associated in the process of beacon frame, broadcast described enhancing distributed channel access parameter to the described website associated.
Second aspect, embodiments provides the method for a kind of WLAN access channel, comprising:
Receive the enhancing distributed channel access parameter that access point apparatus sends, the minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
According to described enhancing distributed channel access parameter contention access channel, accessing WLAN network.
In conjunction with second aspect, in the implementation that the first is possible, described according to described enhancing distributed channel access parameter contention access channel, accessing WLAN network comprises:
When again clashing in the process of carrying out random back, when needing to expand current competitive window, expand instruction according to the first control that the described access point apparatus obtained sends, current competitive window is expanded 1 times and subtract 1 again to form new Stochastic choice region to carry out Stochastic choice; Described first to control to expand instruction be, after quantity that described access point detects the site apparatus associated reaches the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website; Or
When again clashing in the process of carrying out random back, when needing to expand current competitive window, instruction is expanded according to the second control that the described access point apparatus obtained sends, adopt the competition window preset to expand algorithm to expand current competitive window, carry out Stochastic choice to form new Stochastic choice region; Described second to control to expand instruction be, after quantity that described access point detects the site apparatus associated does not reach the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website;
Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
The third aspect, embodiments provides a kind of access point apparatus, comprising:
Quantity determination module, for determining the quantity of the site apparatus associated;
Parameter generation module, for the quantity according to the described site apparatus associated, generates and strengthens distributed channel access parameter; The minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Parameter sending module, for sending described enhancing distributed channel access parameter to the described site apparatus associated.
In conjunction with the third aspect, in the implementation that the first is possible, described parameter generation module comprises:
Setting unit, for the quantity according to the described site apparatus associated, arranges minimum competition window exponential form and maximum contention window exponential form that in described enhancing distributed channel access parameter, each access service types is corresponding;
Computing unit, for the minimum competition window exponential form by arranging and maximum contention window exponential form, calculates minimum competition window corresponding to each access service types described and maximum contention window.
In conjunction with the first possible implementation of the third aspect, in the implementation that the second is possible, described setting unit comprises:
First judging unit, whether the quantity for the site apparatus associated described in judging reaches the first predetermined threshold value;
First judges processing unit, and for when the judged result of described first judging unit is no, arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When the judged result of described first judging unit is for being, arranging described minimum competition window exponential form is the 3rd default value, and arranging described maximum contention window exponential form is the 4th default value.
In conjunction with the first possible implementation of the third aspect, in the implementation that the third is possible, described setting unit comprises:
Second judging unit, whether the quantity for the site apparatus associated described in judging reaches the first predetermined threshold value;
Second judges processing unit, and for when the judged result of described second judging unit is no, arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When the judged result of described second judging unit is for being, whether the quantity of the site apparatus associated described in checking reaches the second predetermined threshold value;
Check processing unit, for when checking that result is no, arranging described minimum competition window exponential form is the 5th default value, and arranging described maximum contention window exponential form is the 6th default value; When checking result for being, arranging described minimum competition window exponential form is the 7th default value, and arranging described maximum contention window exponential form is the 8th default value.
In conjunction with the third aspect, or the first possible implementation of the third aspect, or the implementation that the second of the third aspect is possible, or the third possible implementation of the third aspect, in the 4th kind of possible implementation, also comprise:
Detection module, for carry out random back at website process described in website again clash, when needing to expand current competitive window, whether the quantity of the site apparatus associated described in detection reaches the 3rd predetermined threshold value;
Check processing first module, for when the testing result of described detection module is for being, expands 1 times and subtracting 1 again to form new Stochastic choice region for described website Stochastic choice by current competitive window;
Check processing second module, for when the testing result of described detection module is no, expands algorithm by adopting the competition window preset and expands current competitive window, to form new Stochastic choice region for described website Stochastic choice; Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
In conjunction with the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation, described parameter sending module comprises:
Unicast cell, for sending in the process of probing response frame to the website associated, strengthens distributed channel access parameter described in the described website clean culture associated; Or
Radio unit, for sending in the process of beacon frame to the website associated, broadcasts described enhancing distributed channel access parameter to the described website associated.
Fourth aspect, embodiments provides a kind of site apparatus, comprising:
Parameter receiver module, for receiving the enhancing distributed channel access parameter that access point apparatus sends, the minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Channel access module, for according to described enhancing distributed channel access parameter contention access channel, accessing WLAN network.
In conjunction with fourth aspect, in the implementation that the first is possible, described channel access module comprises:
First expanding unit, for when again clashing in the process carrying out random back, when needing to expand current competitive window, expand instruction according to the first control that the described access point apparatus obtained sends, current competitive window is expanded 1 times and subtract 1 again to form new Stochastic choice region to carry out Stochastic choice; Described first to control to expand instruction be, after quantity that described access point detects the site apparatus associated reaches the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website; Or
Second expanding unit, for when again clashing in the process carrying out random back, when needing to expand current competitive window, instruction is expanded according to the second control that the described access point apparatus obtained sends, adopt the competition window preset to expand algorithm to expand current competitive window, carry out Stochastic choice to form new Stochastic choice region; Described second to control to expand instruction be, after quantity that described access point detects the site apparatus associated does not reach the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website;
Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
5th aspect, embodiments provides a kind of wireless communication system, comprises access point apparatus and site apparatus; Wherein
Described access point apparatus is as the third aspect, or the first possible implementation of the third aspect, or the implementation that the second of the third aspect is possible, or the third possible implementation of the third aspect, or the 4th of the third aspect the kind of possible implementation, or the access point apparatus in the 5th of the third aspect the kind of possible implementation;
Described site apparatus is as fourth aspect, or the site apparatus in the first possible implementation of fourth aspect.
By implementing the embodiment of the present invention, by the quantity according to the described site apparatus associated, generate and strengthen distributed channel access parameter, achieve the combination strengthening distributed channel access optimum configurations and STAs quantity, and the competition window expansion algorithm preset can be adopted to expand current competitive window when STAs quantity does not reach the 3rd predetermined threshold value, effectively reduce the competition backoff window that STAs produces in access channel procedure, solve the backoff window stand-by period expense that random backoff mechanism access network in prior art produces very large, waste the technical problem of much unnecessary channel resource, substantially increase the utilization ratio of frequency spectrum.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the emulation schematic diagram that in prior art, Wi-Fi accesses the random backoff mechanism of channel;
Fig. 2 is the emulation schematic diagram that in prior art, Wi-Fi accesses the random backoff mechanism of channel;
Fig. 3 is the schematic flow sheet of the method for WLAN provided by the invention access channel;
Fig. 4 is the form schematic diagram of competition window exponential form provided by the invention;
Fig. 5 is the schematic flow sheet of another embodiment of the method for WLAN provided by the invention access channel;
Fig. 6 is the schematic flow sheet of another embodiment of the method for WLAN provided by the invention access channel;
Fig. 7 is the schematic flow sheet of another embodiment of the method for WLAN provided by the invention access channel;
Fig. 8 is the structural representation of access point apparatus provided by the invention;
Fig. 9 is the structural representation of parameter generation module provided by the invention;
Figure 10 is the structural representation of setting unit provided by the invention;
Figure 11 is the structural representation of another embodiment of setting unit provided by the invention;
Figure 12 is the structural representation of another embodiment of access point apparatus provided by the invention;
Figure 13 is the structural representation of parameter sending module provided by the invention;
Figure 14 is the structural representation of site apparatus provided by the invention;
Figure 15 is the structural representation of channel access module provided by the invention;
Figure 16 is the structural representation of wireless communication system provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, the term used in embodiments of the present invention is only for the object describing specific embodiment, and not intended to be limiting the present invention." one ", " described " and " being somebody's turn to do " of the singulative used in the embodiment of the present invention and appended claims is also intended to comprise most form, unless context clearly represents other implications.It is also understood that term "and/or" used herein refer to and comprise one or more project of listing be associated any or all may combine.
See Fig. 3, be the schematic flow sheet of the method for WLAN provided by the invention access channel, be described from access point side, the method comprises:
Step S300: the quantity determining the site apparatus associated;
Particularly, access point apparatus determines the quantity of the site apparatus be associated with local terminal, such as 10,30 etc.
Step S302: according to the quantity of the described site apparatus associated, generates and strengthens distributed channel access parameter; The minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Particularly, after access point apparatus knows the quantity of associated stations point device, can according to quantity number generate strengthen distributed channel access (Enhanced distributed channel access, EDCA) parameter; Will be understood that, access point apparatus has pre-set the strategy generating EDCA according to the quantity of associated stations point device, achieves the combination of EDCA optimum configurations and STAs quantity, can access the competition backoff window produced in channel procedure by control STAs neatly.
Step S304: send described enhancing distributed channel access parameter to the described site apparatus associated.
Further, the minimum competition window CWmin that in EDCA parameter in step S302, each access service types is corresponding and maximum contention window CWmax generates according to the quantity of the described site apparatus associated, and specifically can realize in the following manner:
The quantity of the site apparatus that access point apparatus has associated according to this, arranges the corresponding minimum competition window exponential form ECWmin and maximum contention window exponential form ECWmax of each access service types in EDCA parameter; By ECWmin and ECWmax arranged, calculate CWmin and CWmax that this each access service types is corresponding.
Particularly, the form schematic diagram of competition window exponential form provided by the invention as shown in Figure 4, according to the quantity Number of associated STAs of the site apparatus associated, can be arranged ECWmin and ECWmax, then passes through formula:
CW
min=2
eCW min-1 formula 1; With
CW
max=2
eCW max-1 formula 2
CWmin and CWmax that this each access service types is corresponding can be calculated.
It should be noted that, the EDCA parameter of generation can be as shown in the table:
ACWmin in table can for the CWmin calculated by formula 1; ACWmax can for the CWmax calculated by formula 2; After website receives EDCA parameter, namely can find out according to own situation the competition window finding out correspondence and carry out contention access channel; Will be understood that, the competition window that Final Station point device draws also with the parameter correlations such as Arbitration Inter Frame Space number AIFSN.
Again further, the schematic flow sheet of another embodiment of the method for WLAN access channel provided by the invention as shown in Figure 5, the method comprises:
Step S500: the quantity determining the site apparatus associated;
Step S502: whether the quantity of the site apparatus associated described in judgement reaches the first predetermined threshold value;
Particularly, access point apparatus can pre-set the first predetermined threshold value, and this first predetermined threshold value includes but not limited to 15,20 etc.; When judged result is no, the quantity of the site apparatus namely associated does not reach this first predetermined threshold value, then perform step S504; When judged result is for being, the quantity of the site apparatus namely associated reaches this first predetermined threshold value, or exceedes this first predetermined threshold value, then perform step S506;
Step S504: arranging minimum competition window exponential form is the first default value, arranging maximum contention window exponential form is the second default value;
Particularly, it is 3 that access point apparatus can arrange ECWmin (i.e. the first default value), and arranging ECWmax (i.e. the second default value) is random natural number in 3-6.
Step S506: arranging minimum competition window exponential form is the 3rd default value, arranging maximum contention window exponential form is the 4th default value;
Particularly, it is 3 that access point can arrange ECWmin (i.e. the 3rd default value), and arranging ECWmax (i.e. the 4th default value) is random natural number in 3-9.
Step S508: by minimum competition window exponential form and the maximum contention window exponential form of setting, calculate minimum competition window corresponding to this each access service types and maximum contention window;
Particularly, with reference to the embodiment of above-mentioned Fig. 4 and formula, CWmin and CWmax that each access service types is corresponding can be calculated.
Step S510: send described enhancing distributed channel access parameter to the described site apparatus associated.
Again further, the schematic flow sheet of another embodiment of the method for WLAN access channel provided by the invention as shown in Figure 6, the method comprises:
Step S600: the quantity determining the site apparatus associated;
Step S602: whether the quantity of the site apparatus associated described in judgement reaches the first predetermined threshold value;
Particularly, the first predetermined threshold value in the embodiment of the present invention can be 8,10 etc.; When judged result is no, then perform step S604; Otherwise perform step S606;
Step S604: arranging minimum competition window exponential form is the first default value, arranging maximum contention window exponential form is the second default value;
Particularly, step S600 to step S604 with reference to the step S500 in above-mentioned Fig. 5 embodiment to step S504, can repeat no more here.
Step S606: whether the quantity of the site apparatus associated described in checking reaches the second predetermined threshold value;
Particularly, access point apparatus can pre-set the second predetermined threshold value, this second predetermined threshold value is greater than the first predetermined threshold value, namely, when this first predetermined threshold value is 8 or 10, this second predetermined threshold value can be 15,18 or 20 etc., when the quantity of the site apparatus judging to have associated does not reach the first predetermined threshold value, this access point apparatus checks whether the quantity of the site apparatus associated reaches this second predetermined threshold value, when checking that result is no, then perform step S608, otherwise perform step S610;
Step S608: arranging described minimum competition window exponential form is the 5th default value, arranging described maximum contention window exponential form is the 6th default value;
Particularly, it is 3 that access point can arrange ECWmin (i.e. the 5th default value), and arranging ECWmax (i.e. the 6th default value) is random natural number in 3-12.
Step S610: arranging described minimum competition window exponential form is the 7th default value, arranging described maximum contention window exponential form is the 8th default value.
Particularly, it is 3 that access point can arrange ECWmin (i.e. the 7th default value), and arranging ECWmax (i.e. the 8th default value) is random natural number in 3-16.
Step S612: by minimum competition window exponential form and the maximum contention window exponential form of setting, calculate minimum competition window corresponding to this each access service types and maximum contention window;
Particularly, with reference to the embodiment of above-mentioned Fig. 4 and formula, CWmin and CWmax that each access service types is corresponding can be calculated.
Step S614: send described enhancing distributed channel access parameter to the described site apparatus associated.
It should be noted that, Fig. 5 embodiment is by judging that the quantity rank of a STAs arranges EDCA parameter, and Fig. 6 embodiment is by judging that the quantity rank of two STAs arranges EDCA parameter; Will be understood that; the embodiment of the present invention can also by judging that the quantity rank of multiple STAs arranges EDCA parameter; the embodiment of the present invention does not limit and judges that the quantity rank of how many STAs is to arrange EDCA parameter, as long as by judging the protection range that the quantity rank of STAs arranges EDCA parameter and all belongs to the embodiment of the present invention.By realizing the combination strengthening distributed channel access optimum configurations and STAs quantity, the competition backoff window that STAs produces in access channel procedure can be reduced, substantially increase the utilization ratio of frequency spectrum.
Again further, in each embodiment of the present invention, this access point apparatus is to after the described site apparatus associated sends described enhancing distributed channel access parameter, can also comprise:
Carry out this website in the process of random back again to clash at website, when needing to expand current competitive window, whether the quantity detecting the site apparatus that this has associated reaches the 3rd predetermined threshold value; When the test results is yes, current competitive window is expanded 1 times and subtract 1 again to form new Stochastic choice region for this website Stochastic choice; When testing result is no, expands algorithm by adopting the competition window preset and current competitive window is expanded, to form new Stochastic choice region for this website Stochastic choice; Wherein, adopt the competition window preset expand algorithm expand after competition window be less than this current competition window and expand 1 times and subtract 1 again.
Particularly, the 3rd predetermined threshold value can be 10,15 or 20 etc., when detecting that the quantity of associated stations point device reaches the 3rd predetermined threshold value, then can pass through formula CW=2
n-1 expands current competitive window, and wherein the quantity of the value of n from 3 to 16, n all can increase by 1 at every turn after clashing; When detecting that the quantity of associated stations point device does not reach the 3rd predetermined threshold value, then can be expanded algorithm by the competition window preset expand current competitive window, wherein adopt default competition window expand algorithm expand after competition window be less than this current competition window and expand 1 times and subtract 1 again; Such as, it can be CW=m × n-1 that this competition window preset expands algorithm, and wherein m is positive integer, and such as m can be that the quantity of 2, n all can increase by 1 at every turn after clashing.
So, the competition window by presetting expands algorithm and carries out expansion than adopting formula CW=2 to current competitive window
n-1 to expand the competition window drawn little, and namely adopt default competition window to expand new Stochastic choice regional extent that algorithm formed is than employing CW=2
n-1 new Stochastic choice regional extent formed is little, thus when the quantity of the site apparatus associated does not reach certain numerical value, can reduce the competition backoff window that STAs produces in access channel procedure.
Again further, in each embodiment of the present invention, access point apparatus sends described enhancing distributed channel access parameter to the described site apparatus associated and can specifically comprise:
Send in the process of probing response frame to the website associated, to this enhancing distributed channel access parameter of this website clean culture associated; Or send to the website associated in the process of beacon frame, broadcast this enhancing distributed channel access parameter to this website associated.
It should be noted that, support that the website of HEW by the method for the WLAN access channel of each embodiment of the present invention, can realize the combination strengthening distributed channel access optimum configurations and STAs quantity; And do not support that the old website of HEW can carry out access channel by original random backoff mechanism, the interference in compatibility can not be there is.
The method of the WLAN access channel the embodiment of the present invention is specifically understood above from access point side, below accordingly, slave site side is described, and the schematic flow sheet of another embodiment of the method for WLAN access channel provided by the invention as shown in Figure 7, comprising:
Step S700: receive the enhancing distributed channel access parameter that access point apparatus sends, the minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Step S702: according to described enhancing distributed channel access parameter contention access channel, accessing WLAN network.
Further, step S702 can also comprise:
When again clashing in the process of carrying out random back, when needing to expand current competitive window, expand instruction according to the first control that this access point apparatus obtained sends, current competitive window is expanded 1 times and subtract 1 again to form new Stochastic choice region to carry out Stochastic choice; First to control to expand instruction be, after quantity that this access point detects the site apparatus associated reaches the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website for this; Or
When again clashing in the process of carrying out random back, when needing to expand current competitive window, instruction is expanded according to the second control that this access point apparatus obtained sends, adopt the competition window preset to expand algorithm to expand current competitive window, carry out Stochastic choice to form new Stochastic choice region; Second to control to expand instruction be, after quantity that this access point detects the site apparatus associated does not reach the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website for this;
Wherein, adopt the competition window preset expand algorithm expand after competition window be less than this current competition window and expand 1 times and subtract 1 again.
Particularly, the 3rd predetermined threshold value can be 10,15 or 20 etc., and when detecting that the quantity of associated stations point device reaches the 3rd predetermined threshold value, then access point apparatus sends first to site apparatus and controls to expand instruction, to indicate this site apparatus by formula CW=2
n-1 expands current competitive window, and wherein the quantity of the value of n from 3 to 16, n all can increase by 1 at every turn after clashing; When detecting that the quantity of associated stations point device does not reach the 3rd predetermined threshold value, then access point apparatus sends second to site apparatus and controls expansion instruction, expand algorithm to indicate this site apparatus by the competition window preset to expand current competitive window, wherein adopt default competition window expand algorithm expand after competition window be less than this current competition window and expand 1 times and subtract 1 again; Such as, it can be CW=m × n-1 that this competition window preset expands algorithm, and wherein m is positive integer, and such as m can be that the quantity of 2, n all can increase by 1 at every turn after clashing.
So, the competition window by presetting expands algorithm and carries out expansion than adopting formula CW=2 to current competitive window
n-1 to expand the competition window drawn little, and namely adopt default competition window to expand new Stochastic choice regional extent that algorithm formed is than employing CW=2
n-1 new Stochastic choice regional extent formed is little, thus when the quantity of the site apparatus associated does not reach certain numerical value, can reduce the competition backoff window that STAs produces in access channel procedure.
Particularly, the embodiment of the present invention can the method for the corresponding WLAN access channel carried out with reference to access point side in above-mentioned Fig. 3 to Fig. 6 embodiment, repeats no more here.
By implementing the embodiment of the present invention, by the quantity according to the described site apparatus associated, generate and strengthen distributed channel access parameter, achieve the combination strengthening distributed channel access optimum configurations and STAs quantity, and the competition window expansion algorithm preset can be adopted to expand current competitive window when STAs quantity does not reach the 3rd predetermined threshold value, effectively reduce the competition backoff window that STAs produces in access channel procedure, solve the backoff window stand-by period expense that random backoff mechanism access network in prior art produces very large, waste the technical problem of much unnecessary channel resource, substantially increase the utilization ratio of frequency spectrum.
The above-mentioned method illustrating the embodiment of the present invention, below for the ease of implementing the such scheme of the embodiment of the present invention better, correspondingly, is also provided for coordinating the relevant device implementing such scheme below.
The structural representation of access point apparatus provided by the invention as shown in Figure 8, access point apparatus 80 comprises: quantity determination module 800, parameter generation module 802 and parameter sending module 804, wherein
Quantity determination module 800 is for determining the quantity of the site apparatus associated;
Parameter generation module 802, for the quantity according to the described site apparatus associated, generates and strengthens distributed channel access parameter; The minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Parameter sending module 804 is for sending described enhancing distributed channel access parameter to the described site apparatus associated.
Particularly, the structural representation of parameter generation module provided by the invention as shown in Figure 9, parameter generation module 802 can comprise setting unit 8020 and computing unit 8022, wherein:
Setting unit 8020, for the quantity according to the described site apparatus associated, arranges minimum competition window exponential form and maximum contention window exponential form that in described enhancing distributed channel access parameter, each access service types is corresponding;
Computing unit 8022, for the minimum competition window exponential form by arranging and maximum contention window exponential form, calculates minimum competition window corresponding to each access service types described and maximum contention window.
Further, the structural representation of setting unit provided by the invention as shown in Figure 10, setting unit 8020 can comprise the first judging unit 80200 and first and judge processing unit 80202, wherein:
Whether the first judging unit 80200 reaches the first predetermined threshold value for the quantity of the site apparatus associated described in judging;
First judges that processing unit 80202 is for when the judged result of the first judging unit 80200 is no, and arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When the judged result of the first judging unit 80200 is for being, arranging described minimum competition window exponential form is the 3rd default value, and arranging described maximum contention window exponential form is the 4th default value.
Further, the structural representation of another embodiment of setting unit provided by the invention as shown in Figure 11, setting unit 8020 can comprise the second judging unit 80204, second and judges processing unit 80206 and check processing unit 80208, wherein
Whether the second judging unit 80204 reaches the first predetermined threshold value for the quantity of the site apparatus associated described in judging;
Second judges that processing unit 80206 is for when the judged result of the second judging unit 80204 is no, and arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When the judged result of the second judging unit 80204 is for being, whether the quantity of the site apparatus associated described in checking reaches the second predetermined threshold value;
Check that processing unit 80208 is for when checking that result is no, arranging described minimum competition window exponential form is the 5th default value, and arranging described maximum contention window exponential form is the 6th default value; When checking result for being, arranging described minimum competition window exponential form is the 7th default value, and arranging described maximum contention window exponential form is the 8th default value.
Again further, the structural representation of another embodiment of access point apparatus provided by the invention as shown in Figure 12, access point apparatus 80 comprises outside quantity determination module 800, parameter generation module 802 and parameter sending module 804, detection module 806, check processing first module 808 and check processing second module 8010 can also be comprised, wherein
Detection module 806 for carry out random back at website process described in website again clash, when needing to expand current competitive window, whether the quantity of the site apparatus associated described in detection reaches the 3rd predetermined threshold value;
Current competitive window, for when the testing result of detection module 806 is for being, is expanded 1 times and subtracting 1 again to form new Stochastic choice region for described website Stochastic choice by check processing first module 808;
Check processing second module 8010, for when the testing result of detection module 806 is no, expands algorithm by adopting the competition window preset and expands current competitive window, to form new Stochastic choice region for described website Stochastic choice; Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
Again further, the structural representation of parameter sending module provided by the invention as shown in Figure 13, parameter sending module 804 can comprise unicast cell 8040 or radio unit 8042, parameter sending module 804 also can comprise unicast cell 8040 and radio unit 8042 simultaneously, to comprise unicast cell 8040 and radio unit 8042 is described simultaneously in Figure 13, wherein:
Unicast cell 8020, for sending in the process of probing response frame to the website associated, strengthens distributed channel access parameter described in the described website clean culture associated;
Radio unit 8042, for sending in the process of beacon frame to the website associated, broadcasts described enhancing distributed channel access parameter to the described website associated.
Access point apparatus 80 in the embodiment of the present invention can be such as Network Management Equipment, router, transmission node, intelligent mobile terminal or other network equipment.
Will be understood that, the function of each functional module of the access point apparatus 80 of the present embodiment can according to the method specific implementation in said method embodiment, can the associated description of concrete corresponding reference diagram 3 to Fig. 6 embodiment of the method, repeats no more herein.
The above-mentioned access point apparatus 80 illustrating the embodiment of the present invention, below for the ease of implementing the such scheme of the embodiment of the present invention better, correspondingly, also provides a kind of site apparatus below;
The structural representation of site apparatus provided by the invention as shown in Figure 14, site apparatus 140 can comprise parameter receiver module 1400 and channel access module 1402, wherein
The enhancing distributed channel access parameter that parameter receiver module 1400 sends for receiving access point apparatus, the minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Channel access module 1402 for according to described enhancing distributed channel access parameter contention access channel, accessing WLAN network.
Particularly, the structural representation of channel access module provided by the invention as shown in Figure 15, channel access module 1402 can comprise the first expanding unit 14020 or the second expanding unit 14022, channel access module 1402 also can comprise the first expanding unit 14020 and the second expanding unit 14022 simultaneously, to comprise the first expanding unit 14020 and the second expanding unit 14022 is described simultaneously in Figure 13, wherein
First expanding unit 14020 is for when again clashing in the process carrying out random back, when needing to expand current competitive window, expand instruction according to the first control that the described access point apparatus obtained sends, current competitive window is expanded 1 times and subtract 1 again to form new Stochastic choice region to carry out Stochastic choice; Described first to control to expand instruction be, after quantity that described access point detects the site apparatus associated reaches the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website;
Second expanding unit 14022 is for when again clashing in the process carrying out random back, when needing to expand current competitive window, instruction is expanded according to the second control that the described access point apparatus obtained sends, adopt the competition window preset to expand algorithm to expand current competitive window, carry out Stochastic choice to form new Stochastic choice region; Described second to control to expand instruction be, after quantity that described access point detects the site apparatus associated does not reach the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website;
Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
The site apparatus 140 of the embodiment of the present invention can be such as panel computer, personal digital assistant, intelligent mobile terminal or other network equipment.
Will be understood that, in site apparatus 140, the function of each functional module according to the method specific implementation in said method embodiment, that is, specifically with reference to the method item embodiment of above-mentioned Fig. 7, can repeat no more here.
For the ease of implementing the such scheme of the embodiment of the present invention better, present invention also offers for coordinating the related system implementing such scheme.Below in conjunction with the structural representation of the wireless communication system provided by the invention shown in Figure 16, be described in detail:
Wireless communication system 160 comprises access point apparatus 1600 and site apparatus 1602; Intelligible, wireless communication system 160 can comprise to comprise 1 site apparatus 1602 in multiple site apparatus 1602, figure, wherein
Access point apparatus 1600 can be the access point apparatus 80 in above-mentioned Fig. 8 to Figure 13 any embodiment, repeats no more here;
Site apparatus 1602 can be the site apparatus 140 in above-mentioned Figure 14 to Figure 15 embodiment, repeats no more here.
In sum, by implementing the embodiment of the present invention, by the quantity according to the described site apparatus associated, generate and strengthen distributed channel access parameter, achieve the combination strengthening distributed channel access optimum configurations and STAs quantity, and the competition window expansion algorithm preset can be adopted to expand current competitive window when STAs quantity does not reach the 3rd predetermined threshold value, effectively reduce the competition backoff window that STAs produces in access channel procedure, solve the backoff window stand-by period expense that random backoff mechanism access network in prior art produces very large, waste the technical problem of much unnecessary channel resource, substantially increase the utilization ratio of frequency spectrum.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosedly be only a kind of preferred embodiment of the present invention, certainly the interest field of the present invention can not be limited with this, one of ordinary skill in the art will appreciate that all or part of flow process realizing above-described embodiment, and according to the equivalent variations that the claims in the present invention are done, still belong to the scope that invention is contained.
Claims (17)
1. a method for WLAN access channel, is characterized in that, comprising:
Determine the quantity of the site apparatus associated;
According to the quantity of the described site apparatus associated, generate and strengthen distributed channel access parameter; The minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Described enhancing distributed channel access parameter is sent to the described site apparatus associated.
2. the method for claim 1, is characterized in that, the quantity of the site apparatus associated described in described basis, generates enhancing distributed channel access parameter and comprises:
According to the quantity of the described site apparatus associated, minimum competition window exponential form and maximum contention window exponential form that in described enhancing distributed channel access parameter, each access service types is corresponding are set;
By minimum competition window exponential form and the maximum contention window exponential form of setting, calculate minimum competition window corresponding to each access service types described and maximum contention window.
3. method as claimed in claim 2, it is characterized in that, the quantity of the site apparatus associated described in described basis, arranges minimum competition window exponential form that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window exponential form comprises:
Whether the quantity of the site apparatus associated described in judgement reaches the first predetermined threshold value;
When judged result is no, arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When judged result is for being, arranging described minimum competition window exponential form is the 3rd default value, and arranging described maximum contention window exponential form is the 4th default value.
4. method as claimed in claim 2, it is characterized in that, the quantity of the site apparatus associated described in described basis, arranges minimum competition window exponential form that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window exponential form comprises:
Whether the quantity of the site apparatus associated described in judgement reaches the first predetermined threshold value;
When judged result is no, arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When judged result is for being, whether the quantity of the site apparatus associated described in checking reaches the second predetermined threshold value;
When checking that result is no, arranging described minimum competition window exponential form is the 5th default value, and arranging described maximum contention window exponential form is the 6th default value; When checking result for being, arranging described minimum competition window exponential form is the 7th default value, and arranging described maximum contention window exponential form is the 8th default value.
5. the method as described in any one of claim 1-4, is characterized in that, described to after the described site apparatus associated sends described enhancing distributed channel access parameter, also comprises:
Described in the process of carrying out random back at website, website clashes again, and when needing to expand current competitive window, whether the quantity of the site apparatus associated described in detection reaches the 3rd predetermined threshold value;
When the test results is yes, current competitive window is expanded 1 times and subtract 1 again to form new Stochastic choice region for described website Stochastic choice;
When testing result is no, expands algorithm by adopting the competition window preset and current competitive window is expanded, to form new Stochastic choice region for described website Stochastic choice; Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
6. method as claimed in claim 5, is characterized in that, describedly sends described enhancing distributed channel access parameter to the described site apparatus associated and comprises:
Send to the website associated in the process of probing response frame, described in the described website clean culture associated, strengthen distributed channel access parameter; Or
Send to the website associated in the process of beacon frame, broadcast described enhancing distributed channel access parameter to the described website associated.
7. a method for WLAN access channel, is characterized in that, comprising:
Receive the enhancing distributed channel access parameter that access point apparatus sends, the minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
According to described enhancing distributed channel access parameter contention access channel, accessing WLAN network.
8. method as claimed in claim 7, it is characterized in that, described according to described enhancing distributed channel access parameter contention access channel, accessing WLAN network comprises:
When again clashing in the process of carrying out random back, when needing to expand current competitive window, expand instruction according to the first control that the described access point apparatus obtained sends, current competitive window is expanded 1 times and subtract 1 again to form new Stochastic choice region to carry out Stochastic choice; Described first to control to expand instruction be, after quantity that described access point detects the site apparatus associated reaches the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website; Or
When again clashing in the process of carrying out random back, when needing to expand current competitive window, instruction is expanded according to the second control that the described access point apparatus obtained sends, adopt the competition window preset to expand algorithm to expand current competitive window, carry out Stochastic choice to form new Stochastic choice region; Described second to control to expand instruction be, after quantity that described access point detects the site apparatus associated does not reach the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website;
Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
9. an access point apparatus, is characterized in that, comprising:
Quantity determination module, for determining the quantity of the site apparatus associated;
Parameter generation module, for the quantity according to the described site apparatus associated, generates and strengthens distributed channel access parameter; The minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Parameter sending module, for sending described enhancing distributed channel access parameter to the described site apparatus associated.
10. equipment as claimed in claim 9, it is characterized in that, described parameter generation module comprises:
Setting unit, for the quantity according to the described site apparatus associated, arranges minimum competition window exponential form and maximum contention window exponential form that in described enhancing distributed channel access parameter, each access service types is corresponding;
Computing unit, for the minimum competition window exponential form by arranging and maximum contention window exponential form, calculates minimum competition window corresponding to each access service types described and maximum contention window.
11. equipment as claimed in claim 10, it is characterized in that, described setting unit comprises:
First judging unit, whether the quantity for the site apparatus associated described in judging reaches the first predetermined threshold value;
First judges processing unit, and for when the judged result of described first judging unit is no, arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When the judged result of described first judging unit is for being, arranging described minimum competition window exponential form is the 3rd default value, and arranging described maximum contention window exponential form is the 4th default value.
12. equipment as claimed in claim 10, it is characterized in that, described setting unit comprises:
Second judging unit, whether the quantity for the site apparatus associated described in judging reaches the first predetermined threshold value;
Second judges processing unit, and for when the judged result of described second judging unit is no, arranging described minimum competition window exponential form is the first default value, and arranging described maximum contention window exponential form is the second default value; When the judged result of described second judging unit is for being, whether the quantity of the site apparatus associated described in checking reaches the second predetermined threshold value;
Check processing unit, for when checking that result is no, arranging described minimum competition window exponential form is the 5th default value, and arranging described maximum contention window exponential form is the 6th default value; When checking result for being, arranging described minimum competition window exponential form is the 7th default value, and arranging described maximum contention window exponential form is the 8th default value.
13. equipment as described in any one of claim 9-12, is characterized in that, also comprise:
Detection module, for carry out random back at website process described in website again clash, when needing to expand current competitive window, whether the quantity of the site apparatus associated described in detection reaches the 3rd predetermined threshold value;
Check processing first module, for when the testing result of described detection module is for being, expands 1 times and subtracting 1 again to form new Stochastic choice region for described website Stochastic choice by current competitive window;
Check processing second module, for when the testing result of described detection module is no, expands algorithm by adopting the competition window preset and expands current competitive window, to form new Stochastic choice region for described website Stochastic choice; Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
14. equipment as claimed in claim 13, it is characterized in that, described parameter sending module comprises:
Unicast cell, for sending in the process of probing response frame to the website associated, strengthens distributed channel access parameter described in the described website clean culture associated; Or
Radio unit, for sending in the process of beacon frame to the website associated, broadcasts described enhancing distributed channel access parameter to the described website associated.
15. 1 kinds of site apparatus, is characterized in that, comprising:
Parameter receiver module, for receiving the enhancing distributed channel access parameter that access point apparatus sends, the minimum competition window that in described enhancing distributed channel access parameter, each access service types is corresponding and maximum contention window generate according to the quantity of the described site apparatus associated;
Channel access module, for according to described enhancing distributed channel access parameter contention access channel, accessing WLAN network.
16. equipment as claimed in claim 15, it is characterized in that, described channel access module comprises:
First expanding unit, for when again clashing in the process carrying out random back, when needing to expand current competitive window, expand instruction according to the first control that the described access point apparatus obtained sends, current competitive window is expanded 1 times and subtract 1 again to form new Stochastic choice region to carry out Stochastic choice; Described first to control to expand instruction be, after quantity that described access point detects the site apparatus associated reaches the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website; Or
Second expanding unit, for when again clashing in the process carrying out random back, when needing to expand current competitive window, instruction is expanded according to the second control that the described access point apparatus obtained sends, adopt the competition window preset to expand algorithm to expand current competitive window, carry out Stochastic choice to form new Stochastic choice region; Described second to control to expand instruction be, after quantity that described access point detects the site apparatus associated does not reach the 3rd predetermined threshold value, send the instruction being used to indicate expansion current competitive window to website;
Wherein, adopt the competition window preset expand algorithm expand after competition window be less than described current competitive window and expand 1 times and subtract 1 again.
17. 1 kinds of wireless communication systems, is characterized in that, comprise access point apparatus and site apparatus, wherein
Described access point apparatus is the access point apparatus as described in claim 9-14;
Described site apparatus is the site apparatus as described in claim 15 or 16.
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| CN107438289B (en) * | 2016-05-26 | 2020-12-22 | 华为技术有限公司 | Method and device for setting competition window |
| CN107580368A (en) * | 2016-07-05 | 2018-01-12 | 珠海市魅族科技有限公司 | Communication means, communicator, access point and the website of WLAN |
| CN109151958A (en) * | 2017-06-28 | 2019-01-04 | 珠海市魅族科技有限公司 | Communication means and communication device, the communication equipment of WLAN |
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| CN105025588B (en) | 2018-09-14 |
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