CN103237355B - The auto-allocation method of radio communication channel and system - Google Patents
The auto-allocation method of radio communication channel and system Download PDFInfo
- Publication number
- CN103237355B CN103237355B CN201310148195.XA CN201310148195A CN103237355B CN 103237355 B CN103237355 B CN 103237355B CN 201310148195 A CN201310148195 A CN 201310148195A CN 103237355 B CN103237355 B CN 103237355B
- Authority
- CN
- China
- Prior art keywords
- channel
- efficient
- quality assessment
- assessment table
- described efficient
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004891 communication Methods 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 68
- 238000001303 quality assessment method Methods 0.000 claims abstract description 65
- 238000012544 monitoring process Methods 0.000 claims abstract description 22
- 230000007704 transition Effects 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 13
- 238000013441 quality evaluation Methods 0.000 claims description 7
- 238000009499 grossing Methods 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 6
- 230000032683 aging Effects 0.000 abstract description 8
- 238000004904 shortening Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005562 fading Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of auto-allocation method and system of radio communication channel, its method comprises step: the channel conditions periodically measuring each efficient channel corresponding to AP obtains the channel measurement sample value of each efficient channel; The channel measurement sample value of multiple measuring period is adopted to upgrade channel quality assessment table corresponding to each described efficient channel; Monitoring triggering signal, described triggering signal comprises periodically adjudicates request, and the channel quality assessment table corresponding according to the working channel that AP is current when monitoring this judgement request judges whether to need to re-start Channel assignment; If so, then corresponding according to each described efficient channel channel quality assessment table select target channel; Working channel current for AP is switched to this destination channel, and the present invention effectively can improve the accuracy that channel quality judges, the time of implementation shortening channel allocation, strengthens ageing.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of auto-allocation method and system of radio communication channel.
Background technology
In current mobile communications system, channel allocation algorithm is mainly divided into three major types: fixed channel assignment, dynamic channel allocation and accidental channel distribute.But with mobile communications network unlike, the efficient channel number of WLAN (WLAN (wireless local area network)) is limited, channel is very rare resource, such as 802.11b/g/n only has three efficient channels to use, and each wireless access point AP (AccessPoint) can only have a working channel, namely be operated on the very band-limited channel of specifying, and ensure as much as possible not overlap with other channels used, and all working station STA (Station) associated with AP and this AP adopt the mode of time-division to share this channel.And current mobile communications network can distribute different channels to user dynamically according to the size of user load, therefore the Channel distribution mode of the Channel distribution mode of wlan network and mobile network is distinct.
The Channel Assignment Problems of WLAN, indeed through effective channel plan with optimize and revise, makes the common-channel interference between AP drop to minimum.According to the system configuration of current wlan network, its network's coverage area is divided into several communities, each AP covers a community, and according to multiplex mode, the AP of each community uses a channel.When laying large-scale wlan network, just there will be the situation that AP number is greater than available efficient channel number.And how effective several communities AP that available limited efficient channel is distributed to, systematic function is effectively improved, and is the core concept of wlan network channel allocation.
Intelligence for AP allocated channel be the key of wireless application.Meanwhile, there is interference source possible in a large number in the frequency range of WLAN (wireless local area network) work, as radar, microwave oven etc., they are by the normal work of interfering AP.By channel adjustment function, can ensure that each AP can be assigned to optimum channel, reduce as much as possible and avoid adjacent-channel interference, and by Real-time Channel Detection, make AP avoid radar in real time, the interference sources such as microwave oven.Dynamic channel adjustment can realize communicate continue carry out, for the transmitting of network is given security, in the normal work of communication system, play vital effect.
For the key step of AP allocated channel in wlan network comprises in current techniques: scan channel, channel judging, channel allocation, by the scanning result of AP to all efficient channels, judge whether its channel condition meets communicating requirement, and show that preferred channels is distributed, this AP is switched on distributed channel.During owing to carrying out scan channel in wlan network, make it scan this channel measurement sample value obtained and reflect this channel quality accurately, timely, therefore what adopt under normal circumstances is event driver sweep, namely need just to scan when re-starting channel allocation, but after now carrying out channel allocation again after measuring, its whole assigning process overlong time, and if be now because when detecting that radar signal needs to redistribute channel, the ageing of switching channels immediately cannot be met.And according to periodic scan, due to the reason such as sudden of channel, making nearest scanning result more accurately can not reflect channel quality, channel quality judges to there is larger contingency.
Summary of the invention
The object of the present invention is to provide a kind of auto-allocation method and system of radio communication channel, effectively can improve the accuracy that channel quality judges, the time of implementation shortening channel allocation, strengthen ageing.
Object of the present invention is achieved through the following technical solutions:
An auto-allocation method for radio communication channel, comprises the steps:
The channel conditions of each efficient channel that periodic measurement AP is corresponding obtains the channel measurement sample value of each efficient channel;
The channel measurement sample value of multiple measuring period is adopted to upgrade channel quality assessment table corresponding to each described efficient channel;
Monitoring triggering signal, described triggering signal comprises periodically adjudicates request, and the channel quality assessment table corresponding according to the working channel that AP is current when monitoring this judgement request judges whether to need to re-start Channel assignment;
If so, then corresponding according to each described efficient channel channel quality assessment table select target channel;
Working channel current for AP is switched to this destination channel.
An automatic distribution system for radio communication channel, comprising:
Scan channel module, the channel conditions for periodically measuring each efficient channel corresponding to AP obtains the channel measurement sample value of each efficient channel;
Channel quality collection module, upgrades channel quality assessment table corresponding to each described efficient channel for adopting the channel measurement sample value of multiple measuring period;
Channel judging module, for monitoring triggering signal, described triggering signal comprises periodically adjudicates request, the channel quality assessment table corresponding according to the working channel that AP is current when monitoring this judgement request judges whether to need to re-start Channel assignment, if so, then corresponding according to each described efficient channel channel quality assessment table select target channel;
Channel switching module, for being switched to this destination channel by working channel current for AP.
According to the scheme of the invention described above, it is the channel conditions periodically measuring each efficient channel corresponding to AP, the channel measurement sample value in multiple measurement moment is adopted to upgrade channel quality assessment table corresponding to each described efficient channel, the channel quality assessment table corresponding according to the working channel that AP is current when decision instruction being detected judges that this working channel is the need of reselecting, if, then according to the channel quality assessment table select target channel of each described efficient channel, working channel current for AP is switched to this destination channel, owing to reference to the channel measured value of efficient channel in a period of time to determine the channel quality assessment table of this channel, can be comprehensive, show the quality of this each efficient channel of AP of this phases-time accurately, effectively can improve the accuracy that channel quality judges, shorten the time of implementation of channel allocation, strengthen ageing.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the auto-allocation method embodiment of radio communication channel of the present invention;
Fig. 2 is step S104 refinement schematic flow sheet in Fig. 1;
Fig. 3 is the automatic configuration flow schematic diagram of initial channel in specific embodiments of the invention;
Periodic channel automatic configuration flow schematic diagram when Fig. 4 is the service operation in specific embodiments of the invention;
Fig. 5 is the structural representation of the automatic distribution system embodiment of radio communication channel of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is further elaborated, but embodiments of the present invention are not limited thereto.
Shown in Figure 1, be the schematic flow sheet of the auto-allocation method embodiment of radio communication channel of the present invention.As shown in Figure 1, the auto-allocation method of the radio communication channel in this embodiment comprises the steps:
Step S101: the channel conditions periodically measuring each efficient channel corresponding to AP obtains the channel measurement sample value of each efficient channel;
Per interval t1 measures once the channel conditions of each efficient channel, channel conditions measurement obtains channel measurement sample value and comprises Received signal strength instruction intensity RSSI, channel estimating and to hurry the information such as cycle CCA, adjacent AP quantity, packet error rate PER, existing scanning technique, the acquisition of the channel conditions correlation measure to each efficient channel corresponding to AP can be completed, do not repeat them here;
Here efficient channel refers to the channel that this AP can use, during specific implementation, can configure according to actual conditions whole channel or the local channel that AP can use corresponding frequency band, the channel that auto-allocation method generally only can be able to use at this AP performs corresponding channel quality measurement;
Step S102: adopt the channel measurement sample value in multiple measurement moment to upgrade channel quality assessment table corresponding to each described efficient channel;
Such as, experienced by 0 before current time, the channel conditions in six moment of t1,2tl, 3tl, 4tl, 5t1 has been when having measured, then can upgrade channel quality assessment table corresponding to each described efficient channel according to the channel measurement sample value of the channel measurement sample value in these six moment and current time; The frequent triggering that the channel quality assessment table that mode like this is set up can effectively avoid the sudden changes such as channel fast-fading to switch channel, reduce channel and switch the disconnection brought, meanwhile, the channel measurement sample value generally choosing the multiple measurement moment in same automatic configuration cycle upgrades channel quality assessment table corresponding to each described efficient channel;
As one preferably mode, be the smoothing process of channel measurement sample value to multiple measurement moment, specifically can in the following way:
Within an automatic configuration cycle, primary channel measurement sample value is used for direct construction and becomes the channel quality assessment table of this AP, and follow-up each channel measurement sample value adopts following formula to upgrade the channel quality assessment table of this AP:
averageMeasReport(T)＝
(1-measForgettingFactor)*averageMeasReport(T-1)
+measForgettingFactor*measReportLast，
To each smoothing process of channel measurement sample value obtained, be configured to the channel quality assessment table of each AP each efficient channel current, wherein, averageMeasReport represents the treated measured value of each channel measurement sample value channel quality in mid-term of reflection; MeasForgettingFactor is measured value forgetting factor, span is 0 ~ 1, its value is larger, represent the measurement sample value that distance current time T is nearer, on channel quality assessment table build to affect proportion larger, as measForgettingFactor=1, then represent that the measurement sample value only considering the T moment builds channel quality assessment table; MeasReportIast is recent channel measurement sample value, corresponding to the channel measurement sample value of the time T in this example; T represents the measurement sample value at current time, and namely T-1 represents last measurement sample value;
Step S103: monitoring triggering signal, described triggering signal comprises periodically adjudicates request, the channel quality assessment table corresponding according to the working channel that AP is current when monitoring this judgement request judges whether to need to re-start Channel assignment, if, enter step S104, if not, maintain current working channel and carry out work;
Per interval t2 judges whether to need to re-start Channel assignment, can make to have judged to need to re-start Channel assignment so shorter to the time completed between Channel assignment, and General Requirements performs the cycle t1 of channel quality measurement much smaller than automatic configuration cycle t2, namely within the time that trigger channel is selected automatically or perform channel quality measurement, to avoid when arriving the Channel assignment cycle of AP, the situation of the AP channel measured value that current time can only be selected to obtain, at this moment due to the sudden change of channel and the characteristic of rapid fading, channel measured value now can not characterize the quality of channel quality, the quality of this section of time upper signal channel can not be reflected in other words,
Step S104: then choose destination channel according to the channel quality assessment table of each described efficient channel;
Due to the channel quality assessment table not only having AP current operating channel corresponding, and the channel quality assessment table having other each efficient channels corresponding, then when current operating channel deterioration, from other efficient channels, select the efficient channel satisfied condition as destination channel, namely select the most applicable destination channel of carrying out transmitting at current time;
Whether detection current operating channel deterioration occurs can in the following way, but also be not limited to as under type:
When arriving automatic configuration cycle, detect the time span that X factor takies current operating channel, can be shorter for the working channel holding time of proper communication if overlong time is expressed as expression, current operating channel is not enough to the transmission quality providing reliable in quality, channel circumstance is relatively more severe, need carry out reselecting of channel to it;
Packet error rate when asking for packet error rate PER and judge that current operating channel provides normal transmission, if PER is too high, this channel is not enough to provide transmitting quality, need carry out reselecting of channel to it;
If above-mentioned two conditions all do not meet, then think that the channel quality of current operating channel of this AP is better, without the need to carrying out Channel assignment again to it, maintaining current operating channel and carrying out work;
Step S105: working channel current for AP is switched to this destination channel.
Accordingly, according to the scheme in above-mentioned the present embodiment, it is the channel conditions periodically measuring each efficient channel corresponding to AP, and adopt the channel measurement sample value of multiple measuring period to upgrade channel quality assessment table corresponding to each described efficient channel, when monitoring judgement request, the channel quality assessment table corresponding according to the working channel that AP is current judges whether to need to re-start Channel assignment, if desired, then corresponding according to each described efficient channel channel quality assessment table select target channel, working channel current for AP is switched to this destination channel, owing to being built with channel quality assessment table, and adopt the channel measurement sample value of multiple measuring period to upgrade this channel quality assessment table, can be comprehensive, show the quality of this each efficient channel of AP of this period accurately, Channel assignment is re-started at needs, channel allocation can be performed fast, effectively can improve the accuracy that channel quality judges, shorten the time of implementation of channel allocation, strengthen ageing.
In addition, in the frequency range of WLAN (wireless local area network) work, there is a large amount of possible interference sources, needing when monitoring radar signal to re-start Channel assignment timely, for this reason, wherein in an embodiment, the basis of a upper embodiment can also comprise step:
Monitoring triggering signal, described triggering signal comprises radar signal, when monitoring radar signal, according to the respective channels quality evaluation table select target channel of each described efficient channel, working channel current for AP is switched to this destination channel.
Owing to recording the good and bad degree of each efficient channel in each described effective channel quality assessment table, therefore, once radar signal be detected, just can select target channel immediately, working channel current for AP is switched to this destination channel, to meet when detecting that radar signal needs to redistribute signal the ageing of switching channels immediately, avoiding problem radar signal being caused to interference.
In addition, in the art, when trigger channel switches for adjacent many AP simultaneously, also exist when destination channel cannot be avoided identical and still cannot eliminate the problem disturbed between AP.Such as, when on channel, AP number is intensive, will perform channel judging because of mutually disturbing between multiple AP, then the court verdict obtained is also probably similar, and these AP can be transformed into same channel, and still interferes with each other on a new channel simultaneously.Thus cause these AP to bob at interchannel swinging, have impact on the entire throughput of execution efficiency that channel distributes automatically and network, we are referred to as wavy expense.For this reason, based on this problem, wherein in an embodiment, adopt the mode of transition probability, select same channel with adjacent channel after avoiding carrying out channel judging, particularly, shown in Figure 2, step S104 can comprise the steps:
Step S1041: the reference interference value Intf determining each described efficient channel respectively according to the parameter of the channel quality assessment table of each described efficient channel
ref;
Determine the mode with reference to interference value, can be respectively according to the channel disturbance holding time interference in each described channel quality assessment table, Received signal strength instruction intensity RSSI, to face in AP quantity neighborCount, packet error rate PER, AP flow one or more and be weighted combination and determine, such as, in a concrete example
Intf
ref＝M1×interference+M2×neighborCount
Wherein: M1 represents that channel disturbance holding time interference is relative to reference interference value Intf
refcalculating time weight, M2 represents that adjacent cell number neighborCount is relative to reference to interference value Intf
refcalculating time weight;
Step S1042: the transition probability determining each described efficient channel respectively according to the reference interference value of the correspondence of each described efficient channel;
The reference interference value Intf of each efficient channel is obtained in step S1041
refafter, ask for the inverse of each efficient channel with reference to interference value as conversion proportion coefficient:
wherein Switch
coeff.mrepresent the conversion proportion coefficient of m efficient channel, ntf
ref.mrepresent the reference interference value of m efficient channel;
Each conversion proportion value in efficient channel is added, even
Switch
totalcoeff＝Switch
coeff.l+Switch
coeff.2+…+Switch
coeff.x
Wherein x represents total x efficient channel in alternative channel set, Switch
coeff.mrepresent the conversion proportion coefficient of m efficient channel, Switch
totalcoefffor all efficient channel conversion proportion coefficient sums;
Ask for the transition probability of each channel, even
wherein Switch
prob.mthe transition probability that channel m in expression efficient channel is corresponding;
Step S1042: according to the transition probability determination destination channel of each described efficient channel;
Multiple AP performs channel judging simultaneously, the court verdict obtained is also probably similar, therefore these AP may all can initial selected to same channel, and still interfere with each other on a new channel, in order to avoid the generation of this situation, adopting a kind of thought of transition probability, namely when selected target channel, is to determine which bar efficient channel is new destination channel with certain transition probability.
In the present embodiment, owing to being determine which bar efficient channel is as destination channel using certain transition probability, be not inherently be transformed into this destination channel, also can be
basis on be multiplied by a proportionality coefficient, such as
even
only have the probability of 50% to carry out channel switch, other 50% maintains former working channel, channel switch does not occur, can reduce the probability still occurring channel collision after channel switch like this.
It should be noted that, in the present embodiment, as alternative channel using each efficient channel, but be also not limited thereto mode, also can determine with reference to before interference value first according to certain condition and with or without radar signal as screening conditions, alternative channel is screened from efficient channel, the reference interference value of each described efficient channel is determined again according to the parameter of channel quality assessment table corresponding to each alternative channel, and then the transition probability of each described efficient channel is determined respectively according to the reference interference value of the correspondence of each alternative channel, finally determine destination channel, do not repeat them here.
The auto-allocation method of radio communication channel of the present invention may be used for IEEE802.11nWLAN, equally, also may be used for IEEE802.11aWLAN, IEEE802.11bWLAN or IEEE802.11gWLAN, has good application prospect.IEEE802.11a/b/g/nWLAN defines two kinds of mode of operation: Adhoc (equity) patterns and infrastructure (framework) pattern.In Adhoc pattern, at least need to comprise two STA, being directly connected between every two STA realizes resource-sharing, and do not need AP and distributed system, the WLAN (wireless local area network) formed thus is also referred to as IBSS network.In infrastructure pattern, each wireless site STA is connected with existing backbone network by AP, this configuration composition BSS.In BSS, AP not only provides the bridging functionality communicated between STA, also provides the connection of STA and cable LAN, so that the equipment on radio subscriber to access cable network or service (as file server, printer, internet link etc.).Then the key factor affecting wlan network performance on the channel configuration of AP.
Specific embodiment
The infrastructure pattern of current WLAN is mainly divided into the mode of the networking of AC+ thin AP architecture and fat AP independence networking.Wherein under AC+ thin AP architecture, the channel measurement sample value that AP measures the channel conditions value of each efficient channel reports to AC with measurement report, is carried out the automatic batch operation of channel of each AP, and issue relevant parameter to AP by AC; And under the fat AP network architecture, each AP carries out the automatic batch operation of channel according to the channel measurement sample value of the channel conditions value measuring each efficient channel, in this specific embodiment, main automatically distribution the channel of AP in the wlan network framework under the thin ap mode of AC+ is described, but is not construed as limiting the invention.
AC will obtain an AP and reports measurement report in each measuring period, according to the measurement report of reported channel quality and neighbor AP, forms AP channel quality assessment table, to the channel that scans analyze.The user brought in order to avoid frequently carrying out channel switching experiences variation, and brings unnecessary transmission information load, and it is a channel switching cycle that system can give tacit consent to the time interval of carrying out channel judging.In channel switching cycle, the measurement report reported each AP processes by AC, to obtain the quality of this channel and the situation of adjacent cell in this selection cycle, in write channel quality assessment table.The present invention adopts the mode of forgetting factor to process measurement report, and its function ensures that recurrence average energy smooths out the impact of rapid fading, can embody the channel condition in mid-term, as slow fading simultaneously.
The measurement report that AC reported according to each measuring period, safeguards channel quality assessment table, and the first time measurement report direct construction that wherein AP reports becomes the channel quality assessment table of this AP, and the measurement report that follow-up each measuring period reports adopts formula:
averageMeasReport(T)＝
measForgettingFactor)*averageMeasReport(T-1)
+measForgettingFactor*measReportLast，
To the smoothing process of measured value in each measurement report obtained, be configured to the channel quality assessment table of each AP each frequency current, wherein, averageMeasReport represents the treated measured value of each measured value channel quality in mid-term of reflection; MeasForgettingFactor is measured value forgetting factor, span is 0 ~ 1, its value is larger, represent the measurement sample value that distance current time T is nearer, on channel quality assessment table build to affect proportion larger, as measForgettingFactor=1, then represent the measurement sample value structure channel quality assessment table only considering that the T moment reports; MeasReportLast is the corresponding measured value in the one-shot measurement report reported recently, corresponding to the measurement report that the time T in this example reports; T represents the measurement report reported at current time, and namely T-1 represents the measurement report that the last time reports;
The process of channel judging refers to and judges the most applicable destination channel of carrying out transmitting at current time, and switches in follow-up operation in this destination channel and carry out work.When channel judging comprises current AP also without working channel, the initial channel namely during initial configuration is selected automatically; And when the operation service stage, periodically by upgrading the acquisition of efficient channel quality measured values and the structure of quality evaluation table, and carry out asking for of channel switch probability on this basis.
The key factor of carrying out channel judging comprises: the determination of the detection of radar signal, the setting of interference threshold, tolerance limit value and the AP number of initiation channel judging.Idiographic flow comprises initial channel and automatically configures and serve operation phase periodic trigger channel and automatically configure, the particular flow sheet in two kinds of situations respectively as shown in Figure 3, Figure 4:
Fig. 3 gives initial condition lower channel automatic configuration flow schematic diagram, and it is as follows that initial channel configures concrete steps automatically:
Step S201:AC completes the structure of every bar efficient channel quality evaluation table in this frequency range according to initial measurement report;
Step S202: search channel Radar channel not detected in this AP efficient channel, puts it in alternative channel set;
Step S203: judge whether the number of channel in alternative channel set is greater than or equal to 1, if so, enters step S204, otherwise think without available frequency;
Step S204: in conjunction with the parameter in channel quality assessment table, calculates the reference interference value Intf of each channel in alternative channel
ref, its mode as previously mentioned, does not repeat them here;
Step S205: the reference interference value Intf obtaining each alternative channel
refafter, according to the reference interference value Intf of each alternative channel
refdetermine the transition probability of each alternative channel, its mode as previously mentioned, does not repeat them here;
Step S206: select this AP to carry out the destination channel switched according to transition probability;
Step S207: initial channel is configured to the destination channel using said method to determine, and issues corresponding configuration to AP, to complete the initial configuration process of channel.
The schematic flow sheet that when Fig. 4 gives service operation, periodic channel configures automatically, concrete steps are as follows:
Step S301: monitoring radar signal, if measure radar signal, step S304;
Step S302: this AP arrives the cycle of carrying out automatic channel configuration, namely above-mentioned automatic configuration cycle, triggers automatic channel allocation algorithm to upgrade optimal channel;
Step S303: the channel quality assessment table reading current this channel as working channel use, as previously mentioned, now parameter updating maintenance in channel quality assessment table, and skip to step S310
Step S304: search other channels, puts into alternative channel set by the channel without Radar channel;
Step S305: judge whether the number of channel in alternative channel set is more than or equal to 1, if set up, enters step S306; If be false, enter step S309;
Step S305: method as previously mentioned, calculates the reference interference value Intf of each channel in alternative channel
ref, its mode can as previously mentioned, not repeat them here;
Step S307: at the reference interference value Intf of each alternative channel
refon basis, ask for the transition probability of each alternative channel, its mode can as previously mentioned, not repeat them here;
Step S308: the selection completing the destination channel of this channel, and issue corresponding configuration by AC and carry out channel switching to AP, AP;
Step S309: if the number of channel is 0 in alternative channel set, represents that all efficient channels of current frequency range all can not use, and be judged as stopping the use of this frequency range or carrying out relevant abnormalities process, flow process terminates;
Step S310: judge that whether the channel quality of current operating channel is enough good, judgment mode comprises by parameters such as PER, the interference in this channel quality assessment table, if this channel quality is better, without the need to carrying out Channel assignment again to it, maintain current operating channel and carry out work, noly enter step S311;
Step S311: search other channels, meets the demands channel condition and channel without radar signal puts into alternative channel set;
Step S312: judge whether the number of channel in alternative channel set is more than or equal to 1, if set up, then enters step S313; If be false, think and retain the current channel that can not carry out changing the working channel now used and do not change;
Step S313: method as previously mentioned, calculates the reference interference value Intf of each channel in alternative channel
ref;
Step S314: at the reference interference value Intf of each alternative channel
refon basis, ask for the transition probability of each alternative channel, its mode can as previously mentioned, not repeat them here;
Step S315: the selection completing the destination channel of this channel, and issue corresponding configuration by AC and carry out channel switching to AP, AP.
According to the auto-allocation method of the radio communication channel of the invention described above, the automatic distribution system that a kind of radio communication channel is also provided of the present invention.
As shown in Figure 5, for the structural representation of the automatic distribution system embodiment of radio communication channel of the present invention, the automatic distribution system of the radio communication channel in this embodiment comprises scan channel module 401, channel quality collection module 402, channel judging module 403, channel switching module 404, wherein:
Scan channel module 401, the channel conditions for periodically measuring each efficient channel corresponding to AP obtains the channel measurement sample value of each efficient channel;
Channel quality collection module 402, upgrades channel quality assessment table corresponding to each described efficient channel for adopting the channel measurement sample value of multiple measuring period;
Channel judging module 403, for monitoring triggering signal, described triggering signal comprises periodically adjudicates request, the channel quality assessment table corresponding according to the working channel that AP is current when monitoring this judgement request judges whether to need to re-start Channel assignment, if so, then corresponding according to each described efficient channel channel quality assessment table select target channel;
Channel switching module 404, for being switched to this destination channel by working channel current for AP.
Accordingly, according to the scheme in above-mentioned the present embodiment, because channel quality collection module 402 is built with channel quality assessment table, and adopt the channel measurement sample value of multiple measuring period to upgrade this channel quality assessment table, the quality of this each efficient channel of AP of this period can be showed comprehensively and accurately, re-start Channel assignment at needs, channel allocation can be performed fast, effectively can improve the accuracy that channel quality judges, the time of implementation shortening channel allocation, strengthen ageing.
In addition, in order to radar signal be detected again, just can select target channel immediately, working channel current for AP is switched to this destination channel, to meet when detecting that signal redistributed by radar signal needs the ageing of switching channels immediately, avoiding problem radar signal being caused to interference.Wherein in an embodiment, described triggering signal can also comprise radar signal, channel judging module 403 can also be used for when monitoring radar signal, according to the respective channels quality evaluation table select target channel of each described efficient channel, working channel current for AP is switched to this destination channel.
Wherein in an embodiment, channel quality collection module 402 can upgrade channel quality assessment table corresponding to each described efficient channel to the smoothing process of the channel measurement sample value in multiple measurement moment, with the frequent triggering effectively avoiding the sudden changes such as channel fast-fading to switch channel, reduce channel and switch the disconnection brought.
Wherein in an embodiment, channel judging module 403 determines the reference interference value of each described efficient channel respectively according to the parameter of the channel quality assessment table of each described efficient channel, and the transition probability of each described efficient channel is determined respectively according to the reference interference value of the correspondence of each described efficient channel, and according to the transition probability determination destination channel of each described efficient channel, select same channel with adjacent channel after avoiding carrying out channel judging.
Wherein, can respectively according to the channel disturbance holding time in each described channel quality assessment table, Received signal strength instruction intensity, to face in AP quantity, packet error rate, AP flow one or more and be weighted the reference interference value that each described efficient channel is determined in combination.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (9)
1. an auto-allocation method for radio communication channel, is characterized in that, comprises the steps:
The channel conditions of each efficient channel that periodic measurement AP is corresponding obtains the channel measurement sample value of each efficient channel;
The channel measurement sample value of multiple measuring period is adopted to upgrade channel quality assessment table corresponding to each described efficient channel;
Monitoring triggering signal, described triggering signal comprises periodically adjudicates request, and the channel quality assessment table corresponding according to the working channel that AP is current when monitoring this judgement request judges whether to need to re-start Channel assignment;
If so, then corresponding according to each described efficient channel channel quality assessment table select target channel;
The switching of the current working channel of AP to this destination channel is carried out according to the proportionality coefficient preset;
Wherein, the described respective channels quality evaluation table select target channel according to each described efficient channel comprises step:
The reference interference value of each described efficient channel is determined respectively according to the parameter of the channel quality assessment table of each described efficient channel;
The transition probability of each described efficient channel is determined respectively according to the reference interference value of the correspondence of each described efficient channel;
According to the transition probability determination destination channel of each described efficient channel.
2. the auto-allocation method of radio communication channel according to claim 1, is characterized in that, also comprises step:
Described triggering signal also comprises radar signal, when monitoring radar signal, according to the respective channels quality evaluation table select target channel of each described efficient channel, working channel current for AP is switched to this destination channel.
3. the auto-allocation method of radio communication channel according to claim 1, it is characterized in that, respectively according to the channel disturbance holding time in each described channel quality assessment table, Received signal strength instruction intensity, to face in AP quantity, packet error rate, AP flow one or more and be weighted the reference interference value that each described efficient channel is determined in combination.
4. the auto-allocation method of radio communication channel according to claim 1 and 2, is characterized in that, upgrades channel quality assessment table corresponding to each described efficient channel to the smoothing process of the channel measurement sample value in multiple measurement moment.
5. the auto-allocation method of radio communication channel according to claim 1 and 2, it is characterized in that, the auto-allocation method of this radio communication channel is used for IEEE802.11nWLAN, IEEE802.11aWLAN, IEEE802.11bWLAN or IEEE802.11gWLAN.
6. an automatic distribution system for radio communication channel, is characterized in that, comprising:
Scan channel module, for periodically measuring the channel measurement sample value of each efficient channel of acquisition of each efficient channel corresponding to AP;
Channel quality collection module, upgrades channel quality assessment table corresponding to each described efficient channel for adopting the channel measurement sample value of multiple measuring period;
Channel judging module, for monitoring triggering signal, described triggering signal comprises periodically adjudicates request, the channel quality assessment table corresponding according to the working channel that AP is current when monitoring this judgement request judges whether to need to re-start Channel assignment, if, the reference interference value of each described efficient channel is then determined according to the parameter of the channel quality assessment table of each described efficient channel, and the transition probability of each described efficient channel is determined respectively according to the reference interference value of the correspondence of each described efficient channel, and according to the transition probability determination destination channel of each described efficient channel,
Channel switching module, for carrying out the switching of the current working channel of AP to destination channel according to the proportionality coefficient preset.
7. the automatic distribution system of radio communication channel according to claim 6, is characterized in that:
Described triggering signal also comprises radar signal, and working channel current for AP, also for when monitoring radar signal, according to the respective channels quality evaluation table select target channel of each described efficient channel, is switched to this destination channel by described channel judging module.
8. the automatic distribution system of the radio communication channel according to claim 6 or 7, is characterized in that:
The smoothing process of the channel measurement sample value of channel quality collection module to multiple measurement moment upgrades channel quality assessment table corresponding to each described efficient channel.
9. the automatic distribution system of radio communication channel according to claim 8, it is characterized in that, respectively according to the channel disturbance holding time in each described channel quality assessment table, Received signal strength instruction intensity, to face in AP quantity, packet error rate, AP flow one or more and be weighted the reference interference value that each described efficient channel is determined in combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310148195.XA CN103237355B (en) | 2013-04-25 | 2013-04-25 | The auto-allocation method of radio communication channel and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310148195.XA CN103237355B (en) | 2013-04-25 | 2013-04-25 | The auto-allocation method of radio communication channel and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103237355A CN103237355A (en) | 2013-08-07 |
| CN103237355B true CN103237355B (en) | 2016-02-03 |
Family
ID=48885361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310148195.XA Expired - Fee Related CN103237355B (en) | 2013-04-25 | 2013-04-25 | The auto-allocation method of radio communication channel and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103237355B (en) |
Families Citing this family (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103442445B (en) * | 2013-08-23 | 2016-08-17 | 京信通信系统（中国）有限公司 | Method for channel allocation and system |
| CN104469959B (en) * | 2013-09-12 | 2018-10-09 | 华为技术有限公司 | A kind of channel arrangement method and system, access controller |
| CN103596228B (en) * | 2013-11-19 | 2016-12-07 | 福建星网锐捷网络有限公司 | A kind of wireless channel switching method and device |
| US9839040B2 (en) * | 2013-11-26 | 2017-12-05 | Echostar Technologies L.L.C. | Mitigating wireless interference |
| CN104703281B (en) * | 2013-12-06 | 2018-09-07 | 华为技术有限公司 | Method for channel allocation, channel dividing arrangement and wireless local area network (WLAN) system |
| CN103686974B (en) * | 2013-12-13 | 2017-03-08 | 京信通信系统（中国）有限公司 | Anti-disturbance method and device in WLAN |
| CN103686813B (en) * | 2013-12-20 | 2020-02-21 | 上海斐讯数据通信技术有限公司 | Device and method for testing automatic switching stability of wireless AP (access point) channel |
| CN103686796B (en) * | 2013-12-24 | 2017-02-22 | 深圳市双赢伟业科技股份有限公司 | Wireless channel selection method with uninterruptible communication |
| CN103826275B (en) * | 2014-03-14 | 2017-12-22 | 中国人民解放军第三军医大学第二附属医院 | The method that communication channel automatically switches |
| CN104507113A (en) * | 2015-01-04 | 2015-04-08 | 北京极科极客科技有限公司 | Method for detecting wifi signal quality of all information channels |
| CN105824013B (en) * | 2015-01-06 | 2019-03-01 | 中兴通讯股份有限公司 | A kind of method and apparatus reducing radar chaff |
| CN104853380B (en) * | 2015-05-11 | 2018-05-22 | 西南交通大学 | A kind of link-quality-evaluating method of multi-channel wireless network |
| CN105357712B (en) * | 2015-05-11 | 2018-11-20 | 西南交通大学 | Multinode scan channel and distribution method in a kind of wireless network |
| CN104967692B (en) * | 2015-07-09 | 2017-02-15 | 焦点科技股份有限公司 | Host mapping automatic switching method and system |
| CN105263173A (en) * | 2015-09-17 | 2016-01-20 | 小米科技有限责任公司 | Channel switching method and device |
| CN105491669B (en) * | 2016-02-02 | 2020-03-06 | 深圳市蜂联科技有限公司 | Method and device for automatically evaluating interference degree of wireless channel |
| CN106878960B (en) * | 2017-03-30 | 2019-11-12 | 深圳市磊科实业有限公司 | The method that single access device carries out channel optimization in a kind of pair of AP cluster networking environment |
| WO2018232579A1 (en) * | 2017-06-20 | 2018-12-27 | 深圳市大疆创新科技有限公司 | Method and device for setting transmission power of communication system |
| CN107483234B (en) * | 2017-08-01 | 2021-06-22 | 深圳市盛路物联通讯技术有限公司 | Method and device for split backup of access point of Internet of things |
| CN109587703B (en) * | 2017-09-28 | 2022-05-24 | 阿里巴巴集团控股有限公司 | Channel optimization method and device |
| CN107995686B (en) * | 2017-12-07 | 2020-09-25 | 锐捷网络股份有限公司 | Wireless local area network channel allocation method, device and system |
| CN108174406B (en) * | 2017-12-25 | 2021-02-05 | 新华三技术有限公司 | Equipment control method and device |
| CN109756982B (en) * | 2019-02-02 | 2020-07-31 | 西安电子科技大学 | Method and device for allocating spectrum resources and computer storage medium |
| CN110012472B (en) * | 2019-03-15 | 2023-09-15 | 北京星网锐捷网络技术有限公司 | Centralized allocation method and device for channels and bandwidths |
| CN110519858B (en) * | 2019-08-16 | 2021-06-08 | 浙江大华技术股份有限公司 | Channel access method, device, computer equipment and storage medium |
| CN112449252B (en) * | 2019-09-04 | 2022-11-04 | 杭州海康威视数字技术股份有限公司 | Method and device for maintaining video streaming system, wireless network bridge equipment and storage medium |
| CN110620625A (en) * | 2019-09-20 | 2019-12-27 | 深圳小鱼儿科技有限公司 | Arrangement method of high-density WIFI system |
| CN112839362B (en) * | 2019-11-22 | 2023-05-02 | 武汉神州数码云科网络技术有限公司 | Self-adaptive channel allocation method and device for wireless local area network |
| CN110958063A (en) * | 2019-11-26 | 2020-04-03 | 天津大学 | Maritime communication channel quality assessment method based on multi-index fusion |
| CN111432453B (en) * | 2020-02-27 | 2022-06-17 | 深圳市镭神智能系统有限公司 | Communication channel determination method, device and equipment |
| CN112636791B (en) * | 2020-12-14 | 2023-06-27 | 努比亚技术有限公司 | Electronic price tag communication method, electronic price tag communication device and computer readable storage medium |
| CN113923699A (en) * | 2021-11-29 | 2022-01-11 | 得力集团有限公司 | WIFI hotspot control method |
| CN114302466B (en) * | 2021-12-30 | 2023-10-27 | 深圳市友华通信技术有限公司 | Channel selection method for wireless router |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1860739A (en) * | 2003-09-25 | 2006-11-08 | 联想（新加坡）私人有限公司 | Apparatus, system, and method for mitigating access point data rate degradation |
| CN1878410A (en) * | 2005-06-08 | 2006-12-13 | 索尼株式会社 | Base apparatus, wireless communication channel changeover method, and wireless communication channel changeover program |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8983467B2 (en) * | 2003-12-09 | 2015-03-17 | Lsi Corporation | Method and apparatus for access point selection using channel correlation in a wireless communication system |
-
2013
- 2013-04-25 CN CN201310148195.XA patent/CN103237355B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1860739A (en) * | 2003-09-25 | 2006-11-08 | 联想（新加坡）私人有限公司 | Apparatus, system, and method for mitigating access point data rate degradation |
| CN1878410A (en) * | 2005-06-08 | 2006-12-13 | 索尼株式会社 | Base apparatus, wireless communication channel changeover method, and wireless communication channel changeover program |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103237355A (en) | 2013-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103237355B (en) | The auto-allocation method of radio communication channel and system | |
| CN103179625B (en) | Cell optimization method in mobile communication system, device and system | |
| US10701574B2 (en) | Downlink interference detection using transmission matrices | |
| US9438393B2 (en) | Radio parameter control apparatus, radio base station, radio parameter control method, and non-transitory computer readable medium | |
| JP4910018B2 (en) | Network interference evaluation method, dynamic channel allocation method and apparatus used in a wireless network | |
| FI108696B (en) | Method and system for mobile communication | |
| EP2509353B1 (en) | Method and system for managing neighboring cell information | |
| EP3082359B1 (en) | Wireless parameter control device, wireless parameter control method, wireless base station and wireless parameter control program | |
| CN102202330A (en) | Coverage self-optimization method of cellular mobile communication system | |
| EP1493293A1 (en) | Method and system for optimizing cell-neighbor lists | |
| CN103650571A (en) | Performing measurements in a digital cellular wireless telecommunication network | |
| CN104053222A (en) | Base station transmitting power adjusting method and apparatus | |
| WO2007034650A1 (en) | Wireless access system, network management apparatus, program, and quality management method | |
| JP6070957B2 (en) | Radio parameter control system, radio parameter control apparatus, radio base station, radio parameter control method, and program | |
| CN100399857C (en) | Adjacent zone terminal monitoring method in mobile communicating system from network control | |
| Oh et al. | Joint radio resource management of channel-assignment and user-association for load balancing in dense WLAN environment | |
| CN104754602A (en) | Wireless quality monitoring method and device | |
| CN100508655C (en) | Method for increasing mobile station switching measurement accuracy and handoff control method | |
| WO2014103434A1 (en) | Wireless parameter control device, wireless parameter control device system, wireless parameter control method, and program thereof | |
| WO2007106644A2 (en) | Apparatus and method for determining a downlink transmit power characteristic in a cellular communication system | |
| CN105050106A (en) | Measurement control method and base station employing measurement control method | |
| JP5928687B2 (en) | Radio parameter control system, radio parameter control apparatus, radio base station, radio parameter control method, and program | |
| KR101616759B1 (en) | Method and apparatus for selecting frequency allocation in wireless communication system | |
| CN102256319B (en) | Communication device and method for selecting communication cell in communication system | |
| KR20130065285A (en) | Carrier assigning method of assigning carrier to station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 No. 10 Shenzhou Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 No. 10 Shenzhou Road, Science City, Luogang District, Guangzhou City, Guangdong Province Patentee before: COMBA TELECOM SYSTEMS (CHINA) Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160203 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |