CN103796210A - Method and device for performing signal transmission - Google Patents

Method and device for performing signal transmission Download PDF

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Publication number
CN103796210A
CN103796210A CN201210418839.8A CN201210418839A CN103796210A CN 103796210 A CN103796210 A CN 103796210A CN 201210418839 A CN201210418839 A CN 201210418839A CN 103796210 A CN103796210 A CN 103796210A
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China
Prior art keywords
channel
signal
know
state
sensing region
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CN201210418839.8A
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Chinese (zh)
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CN103796210B (en
Inventor
赵伟
盛凌志
王文明
张志敏
石伟
杜建凤
赵新宁
李智伟
姜欣
吴茜
韩志峰
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China Mobile Group Beijing Co Ltd
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China Mobile Group Beijing Co Ltd
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Priority to CN201210418839.8A priority Critical patent/CN103796210B/en
Priority to CN201710562220.7A priority patent/CN107347185B/en
Publication of CN103796210A publication Critical patent/CN103796210A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Abstract

The invention relates to the technical field of wireless communication, and particularly relates to a method and a device for performing signal transmission and aims at solving a problem of relatively high channel interference in the prior art. The method of the embodiment of the invention comprises that: all access points APs in a coverage area of a wireless local area network WLAN are grouped, wherein the APs in the same group after grouping can mutually acquire signal transmitting state, a perception area of each AP completely comprises the effective coverage area of other APs in the same group, and the APs which are arranged in different groups with the same allocated channel cannot mutually acquire the signal transmitting state and the perception areas are not overlapped. With adoption of the method and the device of the embodiment of the invention, the APs in the same group can share capacity of the same channel so that interference is avoided, the APs which are arranged in different groups with the same allocated channel cannot mutually acquire the signal transmitting state and the perception areas are not overlapped, and thus the APs of different groups respectively use the channels independently and generation of high interference is avoided.

Description

A kind of method and apparatus that carries out signal transmission
Technical field
The present invention relates to wireless communication technique field, relate in particular to a kind of method and apparatus that carries out signal transmission.
Background technology
WLAN (Wireless Local Area Networks, WLAN) working frequency range of 2.4GHz is 2.4GHz～2.4835GHz, conventionally this frequency range is divided into 13 channels, be respectively 1 ~ 13, the frequency that these 13 channels comprise has overlapping, only have three channels not have each other overlapping, can use simultaneously, as 1,6,11 conventional channels.Need use multiple access points (Access Point, AP) for some ultra-large WLAN coverage territories time, for reducing to greatest extent signal overlap and the interference of interchannel, should avoid adjacent AP to use identical channel.In prior art scheme, adopting staggers as far as possible distributes these three channels, and AP is used alternatingly the method for different channels, makes the signal of overlapping region not be subject to channel disturbance.As shown in Figure 1, be channel assignment scheme conventional in prior art, to the alternately average planning of 1,6,11 3 channel.But, because the distance between AP in WLAN coverage territory is closer, adopt the alternately mode of average planning of channel, cause on the one hand the effective overlay area between the AP that channel is identical may be overlapping, produce channel disturbance, on the other hand, even if the effective overlay area between the identical AP of channel is not overlapping, AP sensing region is each other also likely overlapping, the sensing region of general AP is 2 times of effective transmission region, as shown in Figure 2, be the overlapping schematic diagram in sensing region between the identical AP of channel.
To sum up, because the distance between AP in WLAN coverage territory is closer, in prior art, the channel mode that alternately signal transmission is carried out in average planning can be produced to strong channel disturbance, affect signal transmission.
Summary of the invention
The embodiment of the present invention provides a kind of method and apparatus that carries out signal transmission, has the more intense problem of channel disturbance in order to solve in prior art.
The embodiment of the present invention is carried out the method for signal transmission, comprising:
Each AP in WLAN WLAN coverage territory is divided into groups, wherein, after grouping on the same group in can mutually know that signal sends state between AP, and the sensing region of each AP comprise on the same group completely in effective overlay area of other AP;
For the AP on the same group distributes same channel, for the AP of adjacent sets distributes different channels, can not mutually know that for not interior on the same group signal sends state and the nonoverlapping AP in sensing region distributes same channel;
By be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
The embodiment of the present invention is carried out the method for signal transmission, comprising:
From edge, WLAN coverage territory, select an AP, for the AP of described selection and and the AP of described selection between can not mutually know that signal sends state and distributes the first channel with nonoverlapping other AP in sensing region of the AP of described selection;
Determine in WLAN coverage territory, and with the immediate AP of AP selecting, for definite AP and and described definite AP between can not mutually know that signal sends state and distributes second channel with nonoverlapping other AP in the sensing region of described definite AP;
For other AP except the AP of described the first channel of distribution or second channel in WLAN coverage territory distributes the 3rd channel;
By be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
The embodiment of the present invention is carried out the equipment of signal transmission, comprising:
Distribution module, for each AP in WLAN coverage territory is divided into groups, wherein, after grouping on the same group in can mutually know that signal sends state between AP, and the sensing region of each AP comprise on the same group completely in effective overlay area of other AP; And for the AP on the same group distributes same channel, for the AP of adjacent sets distributes different channels, can not mutually know that for not interior on the same group signal sends state and the nonoverlapping AP in sensing region distributes same channel;
Notification module, for by distribution module be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
The embodiment of the present invention is carried out the equipment of signal transmission, comprising:
Allocation units, for selecting an AP from edge, WLAN coverage territory, for described AP and and described AP between can not mutually know that signal sends state and distribute the first channel with nonoverlapping other AP in sensing region of described AP; Determine in WLAN coverage territory, and with the immediate AP of AP selecting, for definite AP and and described AP between can not mutually know that signal sends state and distributes second channel with nonoverlapping other AP in the sensing region of described AP; For other AP except the AP of described the first channel of distribution or described second channel in WLAN coverage territory distributes the 3rd channel;
Notification unit, for by be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
The embodiment of the present invention is by dividing into groups the AP in WLAN coverage territory, for the AP on the same group distributes same channel, between AP in guaranteeing on the same group, can mutually know that signal sends state, and the sensing region of each AP comprises effective overlay area of interior other AP on the same group completely, AP in making on the same group shares the capacity of same channel, avoid phase mutual interference, and make to be positioned at not on the same group, and distribute between the AP of same channel and can not mutually know that signal sends state, and sensing region is not overlapping, make not the AP of the same channel of distribution on the same group independently use separately channel, avoid the generation of strong interference.
Accompanying drawing explanation
Fig. 1 is by the alternately structure chart of average planning of channel in background technology;
Fig. 2 be in background technology by channel alternately average planning cause the overlapping schematic diagram in sensing region between AP that channel is identical;
Fig. 3-Fig. 8 is related to schematic diagram between the AP that analyzes of the embodiment of the present invention;
The method flow diagram that carries out signal transmission that Fig. 9 provides for first embodiment of the invention;
The structure chart that each channel that Figure 10 provides for the embodiment of the present invention distributes in flakes;
The method flow diagram that carries out signal transmission that Figure 11 provides for second embodiment of the invention;
The structure chart that the single channel that Figure 12 provides for the embodiment of the present invention distributes in flakes;
Each channel method flow diagram that signal transmission is carried out in distribution in flakes that Figure 13 provides for the embodiment of the present invention;
The single channel method flow diagram that signal transmission is carried out in distribution in flakes that Figure 14 provides for the embodiment of the present invention;
The equipment structure chart that carries out signal transmission that Figure 15 provides for third embodiment of the invention;
A kind of equipment structure chart that carries out signal transmission that Figure 16 provides for fourth embodiment of the invention.
Embodiment
The embodiment of the present invention is by dividing into groups the AP in WLAN coverage territory, for the AP on the same group distributes same channel, between AP in guaranteeing on the same group, can mutually know that signal sends state, and the sensing region of each AP comprises effective overlay area of interior other AP on the same group completely, AP in making on the same group shares the capacity of same channel, can not produce interference, and make to be positioned at not on the same group, and distribute between the AP of same channel and can not mutually know that signal sends state, and sensing region is not overlapping, make not the AP of the same channel of distribution on the same group independently use separately channel, can not produce interference yet.
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail.
Relation between AP can be divided into six kinds, is respectively:
Between AP, can mutually know that signal sends state, and wherein the sensing region of each AP comprises effective overlay area of other AP completely;
Between AP, can not mutually know that signal sends state, and wherein the sensing region of each AP comprises effective overlay area of other AP completely;
Between AP, can mutually know that signal sends state, sensing region partly overlaps, and wherein the sensing region of at least one AP not exclusively comprises effective overlay area of other AP;
Between AP, can not mutually know that signal sends state, sensing region partly overlaps, and wherein the sensing region of at least one AP not exclusively comprises effective overlay area of other AP;
Between two AP, can mutually know that signal sends state, and sensing region is not overlapping;
Between two AP, can not mutually know that signal sends state, and sensing region is not overlapping.
Here, between AP, can mutually know that signal transmission state refers to, when an AP is during to terminal transmitted signal, other AP that can mutually know signal transmission state with this AP can know that this AP has sent signal to terminal, thereby can avoid, avoid producing interference to this terminal transmitted signal simultaneously; Accordingly, between AP, can not mutually know that signal transmission state refers to, when an AP is during to terminal transmitted signal, and other AP that can mutually know signal transmission state between this AP cannot know that this AP has sent signal to terminal, thereby just likely produces interference to this terminal transmitted signal simultaneously; Effective overlay area of AP refers to effective working region of all terminals under AP covers; Outside effective overlay area of AP, between terminal and AP, can not carry out normal signal transmission, but, only otherwise exceed the sensing region of AP, AP still can perceive the signal that terminal sends outside effective overlay area of AP, generally, the sensing region of AP is the twice of its effective overlay area.
Fig. 3-Fig. 8 is that six kinds between two AP analyzing of the embodiment of the present invention are related to schematic diagram, supposes here to have distributed same channel to AP1 and AP2, and above six kinds of relations are respectively:
Be related to 1, between two AP, can mutually know that signal sends state, and wherein the sensing region of any AP comprises effective overlay area of another AP completely, under this relation, on the one hand, owing to can mutually knowing between two AP that signal sends state, according to the interference Hedging mechanism of WLAN, one of them AP is during to terminal transmitted signal, another AP can avoid, also be that another AP can be simultaneously to this terminal transmitted signal, the channel capacity of two AP will be equivalent to the channel capacity of 1 AP, can not produce interference between two AP, on the other hand, as shown in Figure 3, in two AP, the sensing region of any AP can comprise effective overlay area of another AP completely, in two AP, the sensing region of any AP can comprise effective working region of another AP all terminals under covering completely, when the terminal in AP1 overlay area is during to AP1 transmitted signal, because this overlay area is in the sensing region of AP2, it is occupied that AP2 can perceive channel, thereby can not give AP1 transmitted signal, also there will not be AP1 to receive the situation of the signal of this terminal and AP2 simultaneously, thereby avoid the interference between terminal and AP.
Be related to and between 2, two AP, can not mutually know that signal sends state, and wherein the sensing region of any AP comprises effective overlay area of another AP completely.
In the time that the sensing region of any AP in two AP can comprise effective overlay area of another AP completely, these two AP can know that the probability of signal transmission state is larger mutually, but, owing to existing certain altitude poor between AP face and end activity face, two AP are overlapping in the sensing region of end activity face, be not equal to two certain perception mutually of AP on AP face, under special circumstances, as shown in Figure 4, on AP face, between two AP, there is obstacle, at this moment, between two AP, just likely can not mutually know that signal sends state, because this obstacle is smaller on the overlay area impact of AP, two AP still likely comprise effective overlay area of the other side in the sensing region of end activity face, in this case, owing to can not mutually knowing between two AP that signal sends state, according to the interference Hedging mechanism of WLAN, one of them AP is during to terminal transmitted signal, another AP can not avoid, also just may give this terminal transmitted signal simultaneously, cause this terminal to receive the signal of two AP simultaneously, cause interference.
Be related to and between 3, two AP, can mutually know that signal sends state, sensing region partly overlaps, and wherein the sensing region of at least one AP not exclusively comprises effective overlay area of another AP.
Under this relation, owing to can mutually knowing between two AP that signal sends state, according to the interference Hedging mechanism of WLAN, one of them AP is during to terminal transmitted signal, another AP can avoid, and the channel capacity of two AP becomes the channel capacity of 1 AP, can not produce interference between two AP; But, as shown in Figure 5, because the sensing region of one of them AP can not comprise effective overlay area of another AP completely, be positioned at outside AP2 sensing region, the terminal of AP1 sensing region is during to AP1 transmitted signal, it is occupied that AP2 can not perceive channel, just may be simultaneously to AP1 transmitted signal, like this, AP1 can receive the signal of terminal and AP2 simultaneously, causes the interference between AP and terminal.
Be related to and between 4, two AP, can not mutually know that signal sends state, sensing region partly overlaps, and wherein the sensing region of at least one AP not exclusively comprises effective overlay area of another AP;
Under this relation, except causing, meeting is related to the disturbed condition described in 3, also has a kind of disturbed condition, owing to can not mutually knowing between two AP that signal sends state, as shown in Figure 6, when AP2 gives the terminal transmitted signal in AP1 sensing region, AP1 can not avoid, also just likely give this terminal transmitted signal, this terminal is received the signal of two AP simultaneously, causes interference simultaneously.
Be related to that 5, two AP can know that signal sends state mutually, and sensing region is not overlapping.
Two AP sensing regions are not overlapping, illustrate that the overlay area distance of two AP is distant, and in the ordinary course of things, these two AP distances are also distant, and it is larger that two AP can not know that signal sends the possibility of state mutually.But under special circumstances, as shown in Figure 7, on AP face, between two AP, there is no obstacle, at this moment between two AP, may be able to mutually know that signal sends state, but AP has and stops while covering downwards, limited the overlay area of AP, two AP are just likely not overlapping in the sensing region of end activity face.Because sensing region is not overlapping, two AP while transmitted signals can not produce interference, but, owing to can mutually knowing between two AP that signal sends state, according to the interference Hedging mechanism of WLAN, when one of them AP transmitted signal, another AP just likely avoids, make the channel can not be multiplexing, lost capacity.
Be related between 6, two AP and can not mutually know that signal sends state, and sensing region is not overlapping;
Under this relation, as shown in Figure 8, owing to can not mutually knowing between two AP that signal sends state, mutual sensing region is not overlapping yet, can not have any interference between AP and between AP and terminal.
For the analysis of above six kinds of relations, in order not produce interference, can make relation belonging to 1 or be related to that 6 AP continues to use original same channel, and be relation belonging to 2 to being related in 5 that the AP in arbitrary relation adjusts channel, the AP that is about to produce disturbed condition is adjusted into different channels.
Sum up six kinds of relations between above AP, be related to 1 and be related to that 6 is relations preferably between AP, can not produce and disturb or cause channel capacity loss, other four kinds of relations all can produce disturbs or causes capacitance loss.
For above analysis, the embodiment of the present invention has proposed a kind of method and apparatus that carries out signal transmission.
As shown in Figure 9, be the method flow diagram that carries out signal transmission that first embodiment of the invention provides, comprising:
S901: each AP in WLAN coverage territory is divided into groups, wherein, after grouping on the same group in can mutually know that signal sends state between AP, and the sensing region of each AP comprise on the same group completely in effective overlay area of other AP;
S902: for the AP on the same group distributes same channel, for the AP of adjacent sets distributes different channels, can not mutually know that for not interior on the same group signal sends state and the nonoverlapping AP in sensing region distributes same channel;
S903: by be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
In specific implementation process, guarantee between interior AP, mutually to know that on the same group signal sends state, and the sensing region of each AP comprises effective overlay area of interior other AP on the same group completely, on the one hand, owing to can mutually knowing between interior on the same group AP that signal sends state, according to the interference Hedging mechanism of WLAN, one of them AP is during to terminal transmitted signal, on the same group, other AP can avoid, also be that other AP can be simultaneously to this terminal transmitted signal, the channel capacity of interior all AP will be equivalent to the channel capacity of 1 AP on the same group, can not produce phase mutual interference between AP, on the other hand, the sensing region of an interior AP can comprise effective overlay area of interior other AP on the same group completely on the same group, on the same group in the sensing region of each AP can comprise on the same group completely in effective working region of all terminals of other AP under covering, suppose and in one group, have two AP, as AP1 and AP2, when the terminal in AP1 overlay area is during to AP1 transmitted signal, because this overlay area is in the sensing region of AP2, it is occupied that AP2 can perceive channel, thereby can not give AP1 transmitted signal, also there will not be AP1 to receive the situation of the signal of this terminal and AP2 simultaneously, also be, relation character between interior AP closes to state and is related to 1 in analysis on the same group, thereby avoid the interference between terminal and AP.
In the time of grouping, can by can not mutually know signal send state and mutual sensing region also nonoverlapping AP be divided in different groups, and distribute same channel for these AP, making closes to state at the relation character between AP on the same group is not related to 6 in analysis, thereby has avoided not the interference between the AP of the same channel of distribution on the same group.
Preferably, before step S901, can also comprise:
For each AP in WLAN coverage territory, obtain this AP by scanning and can know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of this AP;
Each AP in WLAN coverage territory is divided into groups to comprise:
This AP obtaining according to scanning can know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of this AP, and each AP in WLAN coverage territory is divided into groups.
In specific implementation process, other AP that AP and this AP can scan can know that signal sends state mutually, generally, the AP that other signal that AP perceives is stronger is nearer with this AP space length, between stronger other AP of this AP and the signal scanning, to comprise the probability of mutual effective overlay area completely also larger in mutual sensing region, can adopt the mode of the perception of this AP of test and other AP to do further checking, particularly, when in the effective overlay area that terminal is placed in to other AP that each signal scanning is stronger, test this AP and whether can perceive terminal other AP transmitted signal to association, adopt the perception of testing in the same way other AP, if tube terminal is not placed in the overlay area of which AP of other AP that this AP and the signal that scans are stronger, other AP that this AP is stronger with the signal scanning can perceive terminal to associated AP transmitted signal, illustrate that sensing region mutual between other AP that this AP and the signal scanning are stronger comprises mutual effective overlay area completely, just other stronger to this AP and the signal scanning AP can be divided into one group, if have the sensing region of certain AP can not comprise effective overlay area of other AP completely in stronger other AP of this AP and the signal scanning, and the relation between other AP all meets and is related to 1 in above-mentioned analysis on the same group, the AP that this sensing region can not be comprised completely to effective overlay area of other AP rejects from this group.
This AP obtaining according to scanning can know that the AP number of signal transmission state can obtain can not mutually knowing between this AP that signal sends the AP number at the required interval of state mutually, the quantity that can distribute the AP of every group according to the AP number that can not mutually know the signal transmission required interval of state between AP.Such as, in linear space, obtain can mutually knowing that signal sends state between 4 AP and this AP, between the AP that other is distant and this AP, can not mutually know that signal sends state, and between this AP, can not mutually know that it is 4 that signal transmission state needs the AP number at interval; Adopt the method for above-mentioned test AP perception, test AP and and this AP between whether can not mutually know that signal sends the sensing region of other AP of state overlapping, if it is not overlapping, can for this AP and and this AP between can not mutually know that signal sends other AP of state and distributes same channel, otherwise, need to distribute different channels to the AP overlapping with other AP sensing region.
Preferably, in step S901, distribute same channel not on the same group between at least two, interval group;
As shown in figure 10, the structure chart distributing in flakes for each channel;
In specific implementation process, suppose that the channel distributing has 1,6 and 11 these three channels, distribute between two groups at AP place of same channel can two channels in interval AP group, such as, can interval between two groups of allocated channel 1 two groups of allocated channel 6 and 11 respectively, equally, can interval between two groups of allocated channel 6 two groups of allocated channel 1 and 11 respectively, interval two groups of allocated channel 1 and 6 respectively between two groups of allocated channel 11, so, form the general layout that each channel distributes in flakes;
Here, the group at channel 6 and 11 places can respectively be shared the half of the AP number at required interval between two groups of distributing same channel 1, equally, the group at channel 1 and 6 places can respectively be shared the half of the AP number at required interval between two groups at same channel 11 places, the group at channel 1 and 11 places can respectively be shared the half of the AP number at required interval between two groups at channel 6 places, namely, can form the form of each group of mean allocation AP, so, form the in flakes even interval of each channel distribution pattern; Due in actual conditions, the sum of AP is exactly not necessarily 3 multiple, namely not necessarily just can make the AP number of each group identical, can adjust according to actual conditions, makes the AP number of each group approach as far as possible.
Due to specific environment complexity, complete after channel allocation according to planning, still likely there is disturbed condition; Can pass through scanning inspection channel allocation result, as occurred can mutually knowing that signal sends the situation of state between the AP of the same channel of distribution on the same group not, the AP number at interval between the AP of the same channel of distribution on the same group not can be increased, until can not mutually not know that signal sends state between the AP of the same channel of distribution on the same group.
As shown in figure 11, be the method flow diagram that carries out signal transmission that second embodiment of the invention provides, comprising:
S1101: from edge, WLAN coverage territory, select an AP, for the AP that selects and and this AP between can not mutually know that signal sends state and distribute the first channel with nonoverlapping other AP in sensing region of this AP; Determine in WLAN coverage territory, and with the immediate AP of AP selecting, for definite AP and and definite AP between can not mutually know that signal sends state and distributes second channel with nonoverlapping other AP in sensing region of definite AP; For other AP except the AP of distribution the first channel or second channel in WLAN coverage territory distributes the 3rd channel;
S1102: by be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
Preferably, before step S1101, can also comprise:
For each AP in WLAN coverage territory, obtain this AP by scanning and can know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of this AP.
From above-mentioned by different each channel mode that all in flakes interval is distributed, here selecting any one channel is interval channel, i.e. the 3rd channel, selecting any one channel except the 3rd channel is the first channel again, distribute the channel capacity of the AP of the 3rd channel by sacrifice, increase the frequency reuse distance between other AP, make to distribute between the AP of same channel except the 3rd channel and can not mutually know that signal sends state; As, selective channel 1 is the 3rd channel, by spaced apart the AP of the first identical each distribution channel 6 or second channel 11, can not mutually know that signal sends state between the AP that makes to be spaced apart.
As shown in figure 12, the structure chart distributing in flakes for single channel;
From edge, WLAN coverage territory, select an AP, for this AP and and this AP between can not mutually know that signal sends state and distribute the first channel 6 with nonoverlapping other AP in sensing region of this AP, determine in WLAN coverage territory, and with the immediate AP of AP selecting, for definite AP and and this AP between can not mutually know signal send state, and distribute second channel 11 with nonoverlapping other AP in sensing region of this AP, for other AP except the AP of distribution the first channel 6 or second channel 11 distributes the 3rd channel 1, the group at the AP place of allocated channel 1 is as interval group, play and sacrifice self channel capacity, increase the effect of the multiplex distance between the AP that distributes identical channel 6 or 11, make to distribute between the AP of identical channel 6 or 11 and can not mutually know that signal sends state, and unaware mutually, thereby do not produce interference, so, form the general layout that single channel distributes in flakes.
Below two preferred embodiments in the embodiment of the present invention are described in further detail.
As shown in figure 13, each channel providing for the embodiment of the present invention distributes the method flow diagram that carries out signal transmission in flakes, comprising:
S1301: for each AP in WLAN coverage territory, obtain this AP by scanning and can mutually know that signal sends other AP of state, and the signal strength signal intensity of other AP.
S1302: access controller (Access Controler, AC) obtains AP and scans this AP obtaining and can mutually know that signal sends the AP number of state, obtains can not mutually knowing between this AP that signal sends the AP number at the required interval of state;
Such as, in linear space, obtain can mutually knowing that signal sends state between 4 AP and this AP, between the AP that other is distant and this AP, can not mutually know that signal sends state, obtains can not mutually knowing between this AP that it is 4 that signal transmission state needs the AP number at interval.
S1303:AC is according to can not mutually knowing between AP that signal sends the AP number at the required interval of state and the signal strength signal intensity of other AP that scanning obtains, all AP in WLAN coverage territory are divided into groups, wherein, after grouping on the same group in can mutually know that signal sends state between AP, and the sensing region of each AP comprise on the same group completely in effective overlay area of other AP.
Generally, the AP that other signal that AP perceives is stronger is nearer with this AP space length, between stronger other AP of this AP and the signal scanning, to comprise the probability of mutual effective overlay area completely also larger in mutual sensing region, can adopt the mode of the perception of this AP of test and other AP to do further checking, particularly, when in the effective overlay area that terminal is placed in to other AP that each signal scanning is stronger, test this AP and whether can perceive terminal other AP transmitted signal to correspondence, adopt the perception of testing in the same way other AP, if tube terminal is not placed in the overlay area of which AP of other AP that this AP and the signal that scans are stronger, other AP that this AP is stronger with the signal scanning can perceive terminal to associated AP transmitted signal, illustrate that sensing region mutual between other AP that this AP and the signal scanning are stronger comprises mutual effective overlay area completely, just other stronger to this AP and the signal scanning AP can be divided into one group, if in stronger other AP of this AP and the signal scanning, have the sensing region of certain AP can not comprise on the same group completely in effective overlay area of other AP, and the relation character between other AP closes to state and is related to 1 in analysis on the same group, the relation between this and other AP is not met and is related to that 1 AP rejects from this group.
S1304:AC determines the channel of distributing to each AP; Wherein, for the AP on the same group distributes same channel, for the AP of adjacent sets distributes different channels, can not mutually know that for not interior on the same group signal sends state and the nonoverlapping AP in sensing region distributes same channel;
Adopt the method for above-mentioned test AP perception, test each AP and and this AP between whether can not mutually know that signal sends the sensing region of other AP of state overlapping, if it is not overlapping, can for this AP and and this AP between can not mutually know that signal sends other AP of state and distributes same channel, otherwise, need to distribute different channels to the AP overlapping with other AP sensing region.
Here,, due to AP that can two different channels in interval between the identical AP of channel, the quantity that can set every group of AP is the half of the AP number at requisite space interval between the AP that channel is on the same group not identical.
The channel notification that S1305:AC distributes each AP is given corresponding AP, and indication AP carries out signal transmission according to the channel distributing.
Due to specific environment complexity, complete after channel allocation according to planning, still likely there is disturbed condition; Can pass through scanning inspection channel allocation result, as occurred can mutually knowing that signal sends the situation of state between the AP of the same channel of distribution on the same group not, the AP number at interval between the AP of the same channel of distribution on the same group not can be increased, until can not mutually not know that signal sends state between the AP of the same channel of distribution on the same group.
As shown in figure 14, the single channel providing for the embodiment of the present invention distributes the method flow diagram that carries out signal transmission in flakes, comprising:
S1401: for each AP in WLAN coverage territory, obtain this AP by scanning and can mutually know that signal sends other AP of state, and the signal strength signal intensity of other AP.
S1402:AC obtains AP and scans this AP obtaining and can mutually know that signal sends the AP number of state, obtains can not mutually knowing between this AP that signal sends the AP number at the required interval of state.
S1403:AC is according to can not mutually knowing between AP that signal sends the AP number at the required interval of state and the signal strength signal intensity of other AP that scanning obtains, determines the channel of distributing to each AP; Particularly,
From edge, WLAN coverage territory, select an AP, for this AP and and this AP between can not mutually know that signal sends state and distribute the first channel with nonoverlapping other AP in sensing region of this AP;
Determine in WLAN coverage territory, and with the immediate AP of AP selecting, for definite AP and and this AP between can not mutually know that signal sends state and distributes second channel with nonoverlapping other AP in the sensing region of this AP;
For other AP except the AP of distribution the first channel or second channel distributes the 3rd channel;
Here, need to guarantee to distribute between the AP of the 3rd channel, can mutually know signal send state and wherein the sensing region of each AP can cover effective overlay area of other AP completely, these AP play the effect that increases the frequency reuse distance between other AP that distributes identical channel.
The channel notification that S1404:AC distributes each AP is given corresponding AP, and indication AP carries out signal transmission according to the channel distributing.
Based on same inventive concept, the embodiment of the present invention also provides the equipment that carries out signal transmission corresponding with aforementioned method of carrying out signal transmission, because the principle that this equipment is dealt with problems is similar to aforementioned method for transmitting signals, therefore the enforcement of this equipment can be referring to the enforcement of preceding method, repeats part and repeat no more.
As shown in figure 15, be the equipment structure chart that carries out signal transmission that third embodiment of the invention provides, comprising:
Distribution module 151, for each AP in WLAN coverage territory is divided into groups, wherein, after grouping on the same group in can mutually know that signal sends state between AP, and the sensing region of each AP comprises effective overlay area of interior other AP on the same group completely, and for the AP on the same group distributes same channel, for the AP of adjacent sets distributes different channels, can not mutually know that for not interior on the same group signal sends state and the nonoverlapping AP in sensing region distributes same channel;
Notification module 152, for by distribution module be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
Preferably, distribution module 151 specifically for:
Distribute same channel not on the same group between at least two, interval group.
Preferably, this equipment also comprises:
Scan module 153, be used for for each AP in WLAN coverage territory, obtain this AP by scanning and can mutually know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of this AP, this AP obtaining according to scanning can know that signal sends the AP number of state mutually, obtains can not mutually knowing between this AP that signal sends the AP number at the required interval of state.
As shown in figure 16, be a kind of equipment that carries out signal transmission that fourth embodiment of the invention provides, comprising:
Allocation units 161, for selecting an AP from edge, WLAN coverage territory, for this AP and and this AP between can not mutually know that signal sends state and distribute the first channel with nonoverlapping other AP in sensing region of this AP; Determine in WLAN coverage territory, and with the immediate AP of AP selecting, for definite AP and and this AP between can not mutually know that signal sends state and distributes second channel with nonoverlapping other AP in the sensing region of this AP; For other AP except the AP of distribution the first channel or second channel distributes the 3rd channel;
Notification unit 162, for by be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
Preferably, this equipment also comprises:
Scanning element 163, for each AP in WLAN coverage territory, obtains this AP by scanning and can mutually know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of this AP.
Those skilled in the art should understand, embodiments of the invention can be provided as method, device or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (device) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing unit to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing unit produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing unit with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded on computer or other programmable data processing unit, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the modification of the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (10)

1. a method of carrying out signal transmission, is characterized in that, the method comprises:
Each access point AP in WLAN WLAN coverage territory is divided into groups, wherein, after grouping on the same group in can mutually know that signal sends state between AP, and the sensing region of each AP comprise on the same group completely in effective overlay area of other AP;
For the AP on the same group distributes same channel, for the AP of adjacent sets distributes different channels, can not mutually know that for not interior on the same group signal sends state and the nonoverlapping AP in sensing region distributes same channel;
By be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
2. the method for claim 1, is characterized in that, distribute same channel not on the same group between at least two, interval group.
3. the method for claim 1, is characterized in that, described each AP in WLAN coverage territory is divided into groups before, also comprise:
For each AP in WLAN coverage territory, obtain described AP by scanning and can know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of described AP;
Described each AP in WLAN coverage territory is divided into groups to comprise:
The described AP obtaining according to scanning can know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of described AP, and each AP in WLAN coverage territory is divided into groups.
4. a method of carrying out signal transmission, is characterized in that, comprising:
From edge, WLAN coverage territory, select an AP, for the AP of described selection and and the AP of described selection between can not mutually know that signal sends state and distributes the first channel with nonoverlapping other AP in sensing region of the AP of described selection;
Determine in WLAN coverage territory, and with the immediate AP of AP selecting, for definite AP and and described definite AP between can not mutually know that signal sends state and distributes second channel with nonoverlapping other AP in the sensing region of described definite AP;
For other AP except the AP of described the first channel of distribution or second channel in WLAN coverage territory distributes the 3rd channel;
By be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
5. method as claimed in claim 4, is characterized in that, described from edge, WLAN coverage territory, select an AP before, also comprise:
For each AP in WLAN coverage territory, obtain described AP by scanning and can know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of described AP.
6. an equipment that carries out signal transmission, is characterized in that, comprising:
Distribution module, for each AP in WLAN coverage territory is divided into groups, wherein, after grouping on the same group in can mutually know that signal sends state between AP, and the sensing region of each AP comprise on the same group completely in effective overlay area of other AP; And for the AP on the same group distributes same channel, for the AP of adjacent sets distributes different channels, can not mutually know that for not interior on the same group signal sends state and the nonoverlapping AP in sensing region distributes same channel;
Notification module, for by distribution module be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
7. equipment as claimed in claim 6, is characterized in that, described distribution module specifically for:
Distribute same channel not on the same group between at least two, interval group.
8. equipment as claimed in claim 6, is characterized in that, described equipment also comprises:
Scan module, for each AP in WLAN coverage territory, obtains described AP by scanning and can know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of described AP;
Described grouping module specifically for,
The described AP obtaining according to scanning can know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of described AP, and each AP in WLAN coverage territory is divided into groups.
9. an equipment that carries out signal transmission, is characterized in that, comprising:
Allocation units, for selecting an AP from edge, WLAN coverage territory, for described AP and and described AP between can not mutually know that signal sends state and distribute the first channel with nonoverlapping other AP in sensing region of described AP; Determine in WLAN coverage territory, and with the immediate AP of AP selecting, for definite AP and and described AP between can not mutually know that signal sends state and distributes second channel with nonoverlapping other AP in the sensing region of described AP; For other AP except the AP of described the first channel of distribution or described second channel in WLAN coverage territory distributes the 3rd channel;
Notification unit, for by be the each AP channel notification of distributing to corresponding AP, indication AP carries out signal transmission according to the channel distributing.
10. equipment as claimed in claim 9, is characterized in that, described equipment also comprises:
Scanning element, for each AP in WLAN coverage territory, obtains described AP by scanning and can know that signal sends other AP of state, and the signal strength signal intensity of other AP of perceiving of described AP.
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