CN100539531C - The management method of wireless resource in WLAN and device - Google Patents
The management method of wireless resource in WLAN and device Download PDFInfo
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- CN100539531C CN100539531C CNB2007100799921A CN200710079992A CN100539531C CN 100539531 C CN100539531 C CN 100539531C CN B2007100799921 A CNB2007100799921 A CN B2007100799921A CN 200710079992 A CN200710079992 A CN 200710079992A CN 100539531 C CN100539531 C CN 100539531C
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Abstract
The invention discloses a kind of management method of wireless resource in WLAN, comprising: the network resource information that each radio frequency units radio reports in the receiving management territory; Upgrade the optimization order of radio according to current network resource; According to optimization is the radio allocation radio resource in proper order.The present invention proposes a kind of method for managing resource, determine rational Radio Resource optimization order, guarantee that the crucial AP in the network can preferentially obtain Radio Resource according to the network resource information of dynamic acquisition based on Radio Resource optimization path; The present invention does not need the hardware in the existing wlan system is carried out any modification, and monitor network is dynamically carried out resource optimization in real time; The frame-type that the invention allows for RRM is realized, makes the user can select the specific algorithm of RRM neatly, has good autgmentability.
Description
Technical field
The present invention relates to WLAN (Wireless Local Area Network, WLAN (wireless local area network)) field, relate in particular to the management method of Radio Resource among a kind of WLAN and implement the device of this method.
Background technology
WLAN is the product that computer network combines with wireless communication technology, uses wireless channel with connection of mobile terminal into network.802.11 WLAN provides a kind of wireless connections service of local area network (LAN), by AP (Access Point, access point) as wireless transmitting-receiving equipments, to be converted to wireless signal from the data that cable network receives and be sent to portable terminal, and will convert data forwarding to from the wireless signal that portable terminal receives to cable network.
WLAN has networking flexibility, cost is low, speed is high characteristics, is used widely in fields such as enterprise, education, and these application requirements WLAN can provide reliable signal to cover and high data throughput.Generally, in the practical application of WLAN, the AP of some is set according to the concrete characteristics of its applied environment by the user, it is placed in certain location, realizes that by disposing Radio Resources such as the employed channel of each AP, transmitting power the signal of user area covers and data throughput.
It is main relevant with data message speed with the transmitting power of each AP to one skilled in the art will appreciate that signal covers, and transmitting power is high more, and it is good more that signal covers; Under the transmitting power of certain intensity, reduce data message speed and can improve the signal covering.The data throughput of AP is mainly relevant with interference with data message speed, improves data message speed and can improve data throughput under the essentially identical situation of mistake bag number; And the interference that AP is subjected to is strong more, and the more high meeting of wrong bag number causes data throughput to descend.
The interference of AP may come from equipment such as bluetooth, also may come from the contiguous AP that uses same channel.In principle, AP should use non-overlapped channel and the channel different with adjacent AP as far as possible, but the 802.b/g standard has only been stipulated 3 non-overlapped channels, considers that larger wlan network AP quantity is also more, and adjacent AP uses different channels to be difficult in practice realize.When adjacent AP uses same channel, can reduce interference to each other by reducing transmitting power, cover and descend but reduce signal that transmitting power may cause user area between these two AP again.
As seen, the signal that take into account WLAN simultaneously covers and data throughput, when being each AP distributing radio resource, not only will consider the working region of single AP, and needs consideration to have other AP of neighbouring relations and even the network topology of whole WLAN with it.
In the prior art, can adopt RF Plan (Radio Frequency Plan, radio frequency planning) instrument is the AP allocation radio resource among the WLAN.The user is with information such as the physical message of WLAN applied environment, operable radio frequency resource, AP quantity and putting position input RF Plan instrument, RF Plan calculates parameters such as the channel allocation of each AP and transmitting power, by the user manual with these parameter configuration on each AP.
Adopt this method, the user need draw CAD (Computer Aided Design, the computer-aided design) figure of applied environment, also needs the parameter of each AP of manual configuration, process complicated and time consumption and trivial operations; When wlan network changes, for example increase or reduce an AP after, user's whole process repeated again could obtain parameter with new network topology coupling, makes maintenance cost high.
Summary of the invention
The object of the present invention is to provide a kind of management method and device of wireless resource in WLAN, solve the bookkeeping complicated and time consumption of Radio Resource in the prior art, the problem that maintenance cost is high.
The management method of wireless resource in WLAN of the present invention may further comprise the steps:
The network resource information that each radio frequency units reports in the receiving management territory; When having at least two separated networks in the described management domain, described separated network comprises at least one radio frequency units, and any under it in radio frequency units and any radio frequency units of other separated networks do not have neighborhood;
Upgrade the optimization order of each radio frequency units according to current network resource, be specially: determine the neighbours of each radio frequency units according to network resource information, the radio frequency units that more managing neighbor number is set has the optimization order of elder generation;
According to optimization is each radio frequency units allocation radio resource in proper order.
Preferably, to having the radio frequency units of identical optimization order, the radio frequency units that the setting area thresholding is bigger has more first optimization order; The regional value of described radio frequency units is the managing neighbor number sum of its all managing neighbor radio frequency units.
Preferably, to having the radio frequency units of identical optimization order, the less radio frequency units of non-management neighbours number is set is the earlier high priority of order.
Preferably, described method also comprises: the maximum interference value of determining radio frequency units according to network resource information;
To having the radio frequency units of identical optimization order, if need eliminating 802.11, disturbs described management domain, the radio frequency units that low non-802.11 annoyance levels of less maximum interference value then are set has more first optimization order.
Preferably, to having the radio frequency units of identical optimization order, the less or bigger radio frequency units of medium access control system MAC Address is set has more first optimization order.
Preferably:
To having the radio frequency units of identical managing neighbor number, the radio frequency units that the setting area thresholding is bigger has the optimization order of elder generation;
To having the radio frequency units of identical managing neighbor number and same zone thresholding, the less radio frequency units of non-management neighbours number is set has the optimization order of elder generation;
To having the radio frequency units of identical managing neighbor number, same zone thresholding and identical non-management neighbours number, if described management domain need be eliminated 802.11 and disturb, the lower radio frequency units of non-802.11 annoyance levels then is set has the optimization order of elder generation, have the optimization order of elder generation otherwise the less or bigger radio frequency units of MAC Address is set.
Preferably, described network resource information comprises that radio frequency units receives the signal strength signal intensity of other radio frequency units;
The neighbours of described definite radio frequency units are specially: when a radio frequency units received that the signal strength signal intensity of another radio frequency units surpasses certain threshold value, two radio frequency units are neighbours each other.
Alternatively, the described optimization order of upgrading radio frequency units according to current network resource is carried out when receiving the setting incident that radio frequency units reports.
Preferably, described setting incident comprises that radio frequency units starts;
The optimization of described renewal radio frequency units comprises in proper order: the network resource information that reports after starting according to this radio frequency units, the optimization order of each radio frequency units after definite this radio frequency units of increase.
Preferably, described method also comprises:
After connecting for the first time, notify this radio frequency units Initial Trans ratio with the radio frequency units that starts;
Receive the network resource information that this radio frequency units scan channel obtains, this radio frequency units is the transmitting power of scan channel with Initial Trans ratio and the amassing of maximum transmission power.
Alternatively, described optimization order according to current network resource renewal radio frequency units is then carried out at setting cycle.
Preferably, described is that the radio frequency units allocation radio resource then carries out when the optimization of radio frequency units occurs in sequence variation and/or at the setting timer according to current optimization in proper order.
Preferably, described method also comprises: according to the service condition of network resource information statistics radio frequency units;
Describedly carry out when the service condition of radio frequency units satisfies predetermined condition for the radio frequency units allocation radio resource in proper order according to optimization.
The present invention also provides a kind of wireless resource management apparatus of WLAN (wireless local area network), and comprise control unit, optimize unit and memory cell, wherein:
Memory cell is used for preserving the current network resource and the current priority order of each radio frequency units in the management domain, when having at least two separated networks in the described management domain, described separated network comprises at least one radio frequency units, and any under it in radio frequency units and any radio frequency units of other separated networks do not have neighborhood;
Control unit is used for receiving the incident that radio frequency units reports, and exports wherein network resource information to the optimization unit, and the radio-resource-configuration that will optimize unit output is issued to corresponding radio frequency units;
Optimize the unit and be used for the network resource information of radio frequency units in the updated stored unit, determine the neighbours of radio frequency units according to the current network resource in the memory cell, the radio frequency units that more managing neighbor number is set has the optimization order of elder generation, and the optimization order of storage radio frequency units, and the radio-resource-configuration of determining radio frequency units according to current optimization in proper order.
Preferably, described wireless resource management apparatus also comprises monitoring unit, be used for adding up the service condition of radio frequency units according to the network resource information of control unit output, when service condition satisfies optimal conditions, export it to optimization unit, when service condition satisfies report condition, report;
Optimizing the unit is the radio frequency units allocation radio resource according to the service condition that receives from monitoring unit.
Preferably, described optimization unit comprises message processing module, resource distribution module and path management module, wherein:
The resource distribution module is used for according to current optimization order, determines the radio-resource-configuration of radio frequency units according to current network resource and/or service parameter;
Path management module is used for determining and the optimization order of storage radio frequency units according to current network resource;
Message processing module is used for from the network resource information of control unit reception and storage radio frequency units, receive the work state information of monitoring unit, call path management module and determine the optimization order of radio frequency units and call the radio-resource-configuration that the resource distribution module is carried out radio frequency units, and export radio-resource-configuration to control unit.
Preferably, described message processing module receives the network resource information of control module and the service condition of monitoring module with unified interface.
Alternatively, described message processing module when receiving network resource information and/or setting cycle then call path management module.
Alternatively, described message processing module is after calling the priority that path management module upgrades radio, when receiving service parameter and/or set timer and then call the resource distribution module.
The present invention is by the radio in the management domain (radio frequency units) report network resource information, determine the radio-resource-configuration order of each radio according to current network resource information, can finish the management of Radio Resource automatically, when network resource information changes, can change the configuration of resource simultaneously; The present invention not only can greatly simplify the bookkeeping of Radio Resource, reduces the maintenance cost of WLAN, and radio-resource-configuration is changed with the current user mode of WLAN, has realized the dynamic optimization of resource;
Further, call the resource distribution module by message processing module in the wireless resource management apparatus of the present invention and path management module carries out resource management, realized tower structure, make the user can freely select the optimization sequential algorithm of various resource distribution algorithms and radio, have good autgmentability.
Description of drawings
The wlan network topology example figure that Fig. 1 uses for the present invention;
Fig. 2 is the flow chart of a kind of method of definite radio optimization order among the present invention;
Fig. 3 is neighborhood and the optimization order exemplary plot of WLAN among the present invention;
Fig. 4 is for carrying out the flow chart of radio-resource-configuration for radio among the present invention;
Fig. 5 starts and carries out the flow chart of radio-resource-configuration for AP among the present invention;
Fig. 6 is the structural representation of radio-resource-configuration device of the present invention.
Embodiment
The present invention is applied to have the WLAN of center management module, be to comprise a center management module in the system architecture of WLAN, its function comprises the information of collecting each AP in its management domain, as scan channel information and Radio Resource operating position, specify Radio Resource that each AP uses etc.
For example, in the integral WLAN shown in Figure 1, each AP provides the wireless access service as the access point of wireless service to user terminal; Each AP carries out the mutual of data and control information by specific communication protocol and AC (AccessController, access controller); AC couples together wireless network and core network by routing device, and AC can also insert catv terminal in addition.AC is responsible for the data forwarding and the control of whole wireless network as the center management module of wlan network.
To distributed wlan network, can finish information gathering and the resource distribution function of each AP among the WLAN with an AP as center management module.
In addition, the management domain of WLAN can comprise the AC group that is made of a plurality of AC, and promptly a plurality of AC control connected AP respectively, and AC carries out unified information gathering and resource allocation as the center management module of management domain to the AP that is inserted by a plurality of AC.
Need to prove that AC or AP as center management module among the present invention can be an equipment, also can be management equipments in logic that is made of a plurality of equipment.For the purpose of convenient, below be that the situation of management domain center management module is that example describes with AC in the integral WLAN.
In existing WLAN, according to setting or the instruction of AC to AP, AP in the management domain can report variety of event to AC at running, for example scan channel result, radio link layer incident etc., and AC can obtain network resource information on current each AP by reported event.
Among the present invention,, can draw network topology structure and the Radio Resource user mode of AP in the management domain by analyzing these network resource informations.As previously mentioned, the signal that the Radio Resource of an AP use may influence its neighbor AP covers and data throughput, therefore to make finite wireless resources, as reasonable disposition on a plurality of AP such as wireless channel, just need determine the priority of resource allocation order of each AP according to the information such as network topology structure of AP, preferentially obtain Radio Resource to guarantee the crucial AP in the network.When network resource information changes, can dynamically adjust the resource allocation order of AP, and carry out resource allocation again.
Can comprise a radio on the AP, also can comprise a plurality of radio, radio is a radio frequency chip physically normally, can use wireless channel independently to finish the access of Station.In essence, RRM and configuration to as if the radio of AP, among the present invention with radio as management unit.To having only the AP of a radio, radio and AP have same implication.Among the present invention on AC the current network resource of each radio and current optimization order in the domain maintenance management, and be followed successively by radio in proper order according to this optimization and carry out resource allocation.
Radio resource management method of the present invention mainly comprises following 3 steps:
Steps A: receive the incident that radio reports, comprise the network resource information of this radio in the reporting information.Can be on AC the current network resource of each radio in the storage administration territory, when the network resource information that receives changes, upgrade corresponding stored information.
The network resource information that radio reports may be different with the difference of reported event, can comprise the information relevant with network topology, as find new non-management radio (not in management domain); Can also comprise the work state information relevant, too much message retransmission events etc. take place as Station with the Radio Resource operating position.To reflecting the reported event of network topology change, need to adjust the optimization order of radio in the management domain according to the network resource information that reports.
The user can handle which network resource information according to applied environment and the network construction characteristic decision of WLAN, and carries out which kind of processing.For example, which reported event the user can determine to receive, upgrade the optimization order of radio according to which network resource information of these incidents, whether adjust resource distribution, adjust resource distribution etc. when which type of condition is operating state satisfy according to work state information.
Step B: the optimization order of upgrading radio according to current network resource.In other words, safeguarding the sequence list of current online radio in the management domain on AC, can be its Resources allocation according to the ordering of radio in step C one by one.
The user can determine to upgrade the condition of radio optimization order.For example, can when receiving the setting incidents such as non-management AP that AP starts, discovery is new, upgrade the optimization order of radio; A timer can be set, upgrade the optimization order of radio with the setting cycle of timer; To adopting transmitting power to optimize the WLAN of timer, channel selection optimization timer or other timers, can also utilize certain existing timer, carry out the optimization sequential update of radio according to its cycle; Can also adopt the combination of aforesaid way.
The user can select diverse ways to determine radio optimization order at the network construction characteristic of different WLAN.In the following method that the present invention recommends,, can learn the neighborhood of radio in the management domain, the channel information of each radio based on the scan channel result of AP.
Each radio is responsible for collecting the signal strength signal intensity that receives other radio scan channel messages, and with this reporting signal strength; Surpass certain threshold value if radio receives the signal strength signal intensity of another radio, then think these two radio neighbours each other.The neighbours of radio can comprise non-management radio and illegal radio, and non-management radio refers to be positioned at this radio the legal radio of different management domains, as the radio of other enterprises.Illegal radio refers to not belong to this management domain and does not belong to known other management domains, may cause signal to disturb and/or the radio of security threat to this management domain.
When finding the neighborhood of radio, definite networking mode that needs to adapt to WLAN of its signal strength threshold.Zones of different has different networking demands, such as in the zones such as meeting room of enterprise, often disposes by highdensity radio and obtains high data throughput, and the signal strength threshold between these radio can be provided with higherly; And for zones such as rest areas, the distance between general radio is bigger, more stresses signal and covers rather than data throughput, and what the signal strength threshold between these radio was then passable is provided with lowlyer.
After receiving the scan channel result of AP, can adopt the optimization order of flow process decision radio shown in Figure 2.
Step S201: neighbours radio and the channel information of determining current online management radio in the management domain.
Step S202: whether the managing neighbor number of judging radio is identical, if change step S204; If not, then execution in step S203 is provided with the more radio of managing neighbor and is first optimization order.
Step S204: to having the radio of identical managing neighbor number, judge whether the regional value of each radio is identical, if change step S206; If not, execution in step S205, the radio that the setting area thresholding is bigger are the optimization order of elder generation.
With the managing neighbor number addition of all managing neighbor radio of a radio, the value of gained is the regional value of this radio.The regional value of radio has reflected the network area size that radio influenced.Radio can directly influence the resource distribution of its neighbours radio, thereby the neighbours radio of its neighbours radio is produced remote-effects.The regional value of a radio is big more, is subjected to the radio of these radio remote-effects many more in the management domain, represents that the resource distribution of this radio affects bigger network area, can be its preferential resource allocation.
Step S206: to having the radio of identical managing neighbor number and same zone thresholding, judge whether the non-management neighbours number of each radio is identical, if change step S208; If not, execution in step S207 is provided with the less radio of non-management neighbours number and is first optimization order.
Step S208: to having the radio of identical managing neighbor number, same zone thresholding and identical non-management neighbours number, judge whether that this management domain need eliminate 802.11 and disturb, if, execution in step S209; If not, change step S211.
Whether this management domain needs to eliminate 802.11 is disturbed and can be preset on AC by the user.
Step S209: whether non-802.11 annoyance levels of judging each radio with identical managing neighbor number, same zone thresholding and identical non-management neighbours number are identical, if change step S211; If not, execution in step S210 is provided with the lower radio of non-802.11 annoyance levels and is first optimization order.
Non-802.11 annoyance levels can obtain from the information of scan channel.
Step S211: it is the optimization order of elder generation that MAC (Media Access Control, medium access control system) the bigger or less radio in address is set.
Below illustrate the concrete application of the method for above-mentioned definite optimization order.Suppose that in the integral WLAN, AC receives the scan channel result of AP1, AP2, AP3, AP4, AP5 and AP6, AP7 wherein and AP8 are the non-management neighbours.The individual radio that includes only of above-mentioned 6 AP homogeneous.As shown in the table based on the related data that scan channel obtained:
| AP | The neighbor AP tabulation | The managing neighbor number | Regional value | Non-management neighbours number | |
| AP1 | AP2，AP3，AP4， |
4 | 7 | 0 | |
| | AP1 | 1 | 4 | 0 | |
| AP3 | AP1，AP4， |
2 | 6 | 1 | |
| AP4 | AP1， |
2 | 6 | 0 | |
| AP5 | AP1，AP6， |
2 | 5 | 1 | |
| | AP5 | 1 | 2 | 0 |
In the last table, the regional value of each AP is got by the managing neighbor number addition of its managing neighbor.As AP1, its managing neighbor is AP2, AP3, AP4 and AP5, because AP7 and AP8 are not managing neighbors, AP2, AP3, AP4 and AP5 managing neighbor number separately is respectively 1,2,2,2, and the regional value that addition can get AP1 is 7.Be example again with AP3, the neighbor AP of AP3 is AP1, AP4 and AP7, and wherein managing neighbor is AP1 and AP4, and AP1 and AP4 managing neighbor number separately is respectively 4 and 2, so the regional value of AP3 is 6.
According to flow process shown in Figure 2, according to the managing neighbor number, determine that AP1 is the first order node, AP3, AP4 and AP5 are the second order node, and AP2 and AP6 are the 5th order node; Consider the regional value of AP3, AP4 and AP5, can determine that AP5 is the 4th order node; Relatively the non-management neighbours number of AP3 and AP4 can determine that AP3 is the 3rd order node, and AP4 is the second order node; Relatively the regional value of AP2 and AP6 can determine that AP2 is the 5th order node, and AP6 is the 6th order node.Need to prove that the relevant parameter of listing all AP in this example is intended to be convenient to describe, and is not that actual algorithm is realized required.In concrete algorithm is realized, can only calculate moving flow process necessary parameter shown in Figure 2, for example, can not calculate regional value and the non-management neighbours number of AP1, the non-management neighbours number that equally also can not add up AP2 and AP6.
The neighborhood of above-mentioned 6 AP and resource allocation path see also Fig. 3, in the drawings the AP that connects with dotted line neighborhood each other.When resource allocation, carry out one by one successively according to the order of AP1, AP4, AP3, AP5, AP2, AP6; Promptly after the resource allocation of finishing AP1, (1) arrival AP4 is its Resources allocation along the path, and resource optimization is carried out to AP3, AP5, AP2 and AP6 successively in (2), path (3), path (4) and path (5) along the path again.
Need to prove, above-mentioned definite optimization flow process in proper order to the present invention's recommendation, whether consider regional value, non-management neighbours number, non-802.11 annoyance levels of radio, and pay the utmost attention to wherein which and can determine by the user according to concrete network application environment.MAC Address size judgement sequencing by radio then can be used as last Consideration usually.For example, the non-management neighbours number that the user can only consider radio is consideration of regional value and non-802.11 annoyance levels not, also can pay the utmost attention to non-management neighbours number, consideration of regional value again when the managing neighbor number is identical.
Can be on AC the current optimization order of each radio in the storage administration territory, when changing the optimization order of radio according to the network resource information that receives, upgrade corresponding stored information.
Step C: the radio-resource-configuration of carrying out radio according to current optimization in proper order.Radio-resource-configuration mainly comprises transmitting power and the working channel of determining radio.
The user can determine to dispose the condition of radio Radio Resource.For example, can occur in sequence the variation back in the optimization of radio and carry out resource distribution again according to new optimization order; Transmitting power can be set optimize timer, channel selection optimization timer, carry out the resource distribution of correspondence with the setting cycle of timer.If comprise the work state information relevant in the network resource information that receives with the Radio Resource operating position, then can obtain the service condition of current radio according to these Information Statistics, as detected external disturbance change, the user terminal message is too much etc.The user can start the resource distribution process when the service condition that counts satisfies predetermined condition, to realize the real-time optimization of Radio Resource.The user can also adopt the combination of aforesaid way to carry out radio-resource-configuration.
Can adopt figure
4Shown flow process is carried out the radio-resource-configuration of radio.At step S410, one that selects not carry out to have among the radio of this resource distribution the optimized first order as current radio.
Step S420: current radio is carried out resource distribution.Resource distribution can comprise the setting of transmitting power and working channel.
Step S430: judge whether that all radio have finished this resource distribution, if then this resource distribution finishes; If not, change step S410, continuing by optimization is next radio allocation radio resource in proper order.
The user can independently select the algorithm of resource allocation.The existing various channels of prior art select and power control algorithm all can adopt, and repeat no more herein.
Need to prove that optimization sequential update condition and radio-resource-configuration condition according to the user selects may have ordinal relation between the steps A in the above-mentioned wireless resource allocation method, step B, the step C, also may not have ordinal relation.If the user all is set to regularly trigger and adopt different timers with the condition of execution in step B and execution in step C, then steps A, B and C can press time sort run separately respectively.
The user can also be arranged on when receiving some incident execution in step A, B and C successively.If the user is arranged on that AP starts and upgrade optimization order and distributing radio resource again with the AC back that connects, then can finish the AP start-up course according to flow process shown in Figure 5.Be without loss of generality, suppose that this AP includes only a radio.
Step S510:AP startup also is connected to AC.
Step S520:AC selects an interim channel, and notice AP is operated on this interim channel.
Step S530:AC notice AP scans all channels with Initial Trans or by the channel of customization.
AC can be provided with the Initial Trans of AP by the method for notice AP initial power transmitting power ratio InitTxRate, and AP will use the scan channel transmitting power of the product of its maximum transmission power and InitTxRate as AP.The user can adopt following two kinds of methods that the InitTxRate parameter is set:
One is for all radio in the management domain are provided with identical InitTxRate.According to network construction characteristic, the keeper can select suitable InitTxRate, stresses to cover as wlan network, and distance is far away between AP, can select bigger InitTxRate value; Stress to handle up as network, AP density is higher, then can select less InitTxRate value.
Its two, at specific radio different InitTxRate values is set.May there be special demand the specific region of wlan network to AP, at this moment can dispose the InitTxRate value one by one for the AP in these zones.
Step S540: the scan channel result who receives this AP.Generally include other radio tabulations of hearing on the channel id (sign), the signal strength signal intensity on the channel, the interference value on the channel, channel of each channel that is scanned etc. in the scanning result.
The current network resource that step S550:AC preserves this AP according to the scanning result that receives.Which network resource information AC can determine to preserve according to the optimization sequential algorithm of its selection.
Step S560:AC adds this AP in the radio tabulation that need carry out allocation of radio resources, upgrades the optimization order of radio in the tabulation according to the network resource information of current each AP.In other words, AC is inserted into appropriate location in original radio resource allocation formation according to current network resource with this AP.
Step S570:AC carries out resource allocation in proper order according to new optimization.
In addition, may comprise one or more separated network in a management domain.When among any one and another among one group of radio group radio any one do not have neighborhood, in fact there is the white space in the radio communication between these two groups of radio, two groups of radio are in non-interfering state to each other, and this moment, every group of radio formed a separated network.Among the present invention, the radio that all can be had neighborhood is divided into a separated network, if occur at least two separated networks in the management domain, then respectively the radio under it is optimized sequential update and radio-resource-configuration in each separated network.Be equivalent to the subdomain of each separated network as a management domain moved a RRM example respectively in each subdomain.
Wireless resource management apparatus of the present invention can have structure shown in Figure 6, optimizes unit 630 and is connected with control unit 620, monitoring unit 610 and memory cell 640 respectively.
The current network resource of each radio and current optimization order in the in store management domain in the memory cell 640.Control unit 620 is responsible for reception and the preliminary treatment variety of event from radio as the interface of wireless resource management apparatus and each radio.
Resource distribution trigger condition according to user's setting, when satisfying condition, optimize radio optimization order and the network resource information preserved in unit 630 reading cells 640, according to the optimization order is the radio distributing radio resource one by one, and allocation result is sent to control unit 620.After control unit 620 receives the resource allocation result of optimizing unit 630, be converted into the resource distribution instruction of radio and export corresponding AP to.
Wireless resource management apparatus can also be monitored the operating state of each radio, and upgrades the radio-resource-configuration of radio when meeting some requirements in working order and/or report webmaster.At this moment, the network resource information relevant with the radio operating state is sent to monitoring unit 610 in control unit 620 the incident that radio is reported.These information generally include radio link layer incident and physical layer information, for example the message of station retransmits, the station message is handled up, station message mistake etc., and change and/or resource that these information often do not need to trigger the optimization order immediately reconfigure.
The user can select different algorithms to determine optimization order and/or allocation radio resource at the network construction characteristic of different WLAN.Select and change employed algorithm for the ease of the user, optimize unit 630 and can comprise message processing module 631, resource distribution module 632 and path management module 633, message processing module 631 connects control unit 620, monitoring unit 610, memory cell 640, resource distribution module 632 and path management module 633 respectively, and resource distribution module 632 is connected with memory cell 640 respectively with path management module 633.
The network resource informations that 631 pairs of message processing modules receive from control unit 620, the work state information that receives from monitoring unit 610 are handled.When receiving the input of control unit 620 or monitoring unit 610, according to the information that is received, the corresponding informance in message processing module 631 or the updated stored unit 640; Perhaps call resource distribution module 632; Perhaps call path management module 633; Perhaps after the content of updated stored unit 640, call resource distribution module 632; Perhaps after the content of updated stored unit 640, call path management module 633; Perhaps after the content of updated stored unit 640, call path management module 633, after calling path management module 633, call resource distribution module 632 again.Resource allocation result to resource distribution module 632 is returned exports it to control unit 620 by message processing module 631.
In order to realize facility, message processing module 631 can provide unified interface for control unit 620 and monitoring unit 610, handles accordingly according to the information that is received, and needn't be concerned about the source of information.
As previously mentioned, message processing module 631 can be when receiving network resource information and/or setting cycle then call path management module 633, can and/or set timer and then call resource distribution module 632 after call the priority that path management module 633 upgrades radio, when receiving service parameter.
Like this, message processing module 631 provides a framework for receiving information processing, and concerns for loose coupling between the path management module 633, resource distribution module 632.When the user need change the information processing mode, only need to revise message processing module 631; And the user need change when optimizing sequential algorithm or resource distribution algorithm, can replace path management module 633 or resource distribution module 632 respectively, and not need to change message processing module 631.
In existing wireless resource management, collect the incident that AP reports among the WLAN by RRM (Radio ResourceManagement, RRM) subsystem responsible usually, also send the resource distribution instruction to AP simultaneously by the RRM subsystem responsible.Therefore, the wireless resource management apparatus among the present invention can realize in the RRM subsystem easily.The RRM subsystem can be positioned on the AC, also can be positioned on the AP with wireless network management function.
It will be appreciated by those skilled in the art that the present invention can realize in conjunction with known hardware platform by computer program, based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of computer program (or claiming software product), this computer program is stored in the storage medium, comprises that some instructions are used so that a management equipment (hardware platform that possesses enough this computer programs of operation) is carried out the described method of each embodiment of the present invention.
The present invention proposes a kind of method for managing resource and device, determine rational Radio Resource optimization order, guarantee that the crucial AP in the network can preferentially obtain Radio Resource according to the network resource information of dynamic acquisition based on Radio Resource optimization path; The present invention does not rely on RF plan instrument, and monitor network is dynamically carried out resource optimization in real time; The present invention does not need the hardware in the existing wlan system is carried out any modification, only has influence on software section, is convenient to the user and implements.In addition, the frame-type that the invention allows for RRM is realized, makes the user can select the specific algorithm of RRM neatly, has good autgmentability.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (19)
1. the management method of a wireless resource in WLAN is characterized in that, may further comprise the steps:
The network resource information that each radio frequency units reports in the receiving management territory, when having at least two separated networks in the described management domain, described separated network comprises at least one radio frequency units, and any under it in radio frequency units and any radio frequency units of other separated networks do not have neighborhood;
Upgrade the optimization order of each radio frequency units according to current network resource, be specially: determine the neighbours of each radio frequency units according to network resource information, the radio frequency units that more managing neighbor number is set has the optimization order of elder generation;
According to optimization is each radio frequency units allocation radio resource in proper order.
2. the management method of wireless resource in WLAN according to claim 1, it is characterized in that: to having the radio frequency units of identical optimization order, the radio frequency units that the setting area thresholding is bigger has the optimization order of elder generation; The regional value of described radio frequency units is the managing neighbor number sum of its all managing neighbor radio frequency units.
3. the management method of wireless resource in WLAN according to claim 1 is characterized in that, to having the radio frequency units of identical optimization order, the less radio frequency units of non-management neighbours number is set has more first optimization order.
4. the management method of wireless resource in WLAN according to claim 1, it is characterized in that: described method also comprises: the maximum interference value of determining radio frequency units according to network resource information;
To having the radio frequency units of identical optimization order, if need eliminating 802.11, disturbs described management domain, the radio frequency units that low non-802.11 annoyance levels of less maximum interference value then are set has more first optimization order.
5. as the management method of wireless resource in WLAN as described in any one of the claim 1 to 4, it is characterized in that:, the less or bigger radio frequency units of medium access control system MAC Address is set has more first optimization order having the radio frequency units of identical optimization order.
6. as the management method of wireless resource in WLAN as described in the claim 4, it is characterized in that:
To having the radio frequency units of identical managing neighbor number, the radio frequency units that the setting area thresholding is bigger has the optimization order of elder generation;
To having the radio frequency units of identical managing neighbor number and same zone thresholding, the less radio frequency units of non-management neighbours number is set has the optimization order of elder generation;
To having the radio frequency units of identical managing neighbor number, same zone thresholding and identical non-management neighbours number, if described management domain need be eliminated 802.11 and disturb, the lower radio frequency units of non-802.11 annoyance levels then is set has the optimization order of elder generation, have the optimization order of elder generation otherwise the less or bigger radio frequency units of MAC Address is set.
7. the management method of wireless resource in WLAN according to claim 1 is characterized in that:
Described network resource information comprises that radio frequency units receives the signal strength signal intensity of other radio frequency units;
The neighbours of described definite radio frequency units are specially: when a radio frequency units received that the signal strength signal intensity of another radio frequency units surpasses certain threshold value, two radio frequency units are neighbours each other.
8. the management method of wireless resource in WLAN according to claim 1 is characterized in that: the described optimization order of upgrading radio frequency units according to current network resource is carried out when receiving the setting incident that radio frequency units reports.
9. as the management method of wireless resource in WLAN as described in the claim 8, it is characterized in that: described setting incident comprises that radio frequency units starts;
The optimization of described renewal radio frequency units comprises in proper order: the network resource information that reports after starting according to this radio frequency units, the optimization order of each radio frequency units after definite this radio frequency units of increase.
10. as the management method of wireless resource in WLAN as described in the claim 9, it is characterized in that described method also comprises:
After connecting for the first time, notify this radio frequency units Initial Trans ratio with the radio frequency units that starts;
Receive the network resource information that this radio frequency units scan channel obtains, this radio frequency units is the transmitting power of scan channel with Initial Trans ratio and the amassing of maximum transmission power.
11. the management method as wireless resource in WLAN as described in claim 1 or 8 is characterized in that: the described optimization order of upgrading radio frequency units according to current network resource is then carried out at setting cycle.
12. the management method of wireless resource in WLAN according to claim 1 is characterized in that: describedly occur in sequence when changing and/or then carry out setting timer in the optimization of radio frequency units for the radio frequency units allocation radio resource in proper order according to current optimization.
13. the management method as wireless resource in WLAN as described in claim 1 or 12 is characterized in that described method also comprises: according to the service condition of network resource information statistics radio frequency units;
Describedly carry out when the service condition of radio frequency units satisfies predetermined condition for the radio frequency units allocation radio resource in proper order according to optimization.
14. the wireless resource management apparatus of a WLAN (wireless local area network) is characterized in that, comprises control unit, optimizes unit and memory cell, wherein:
Memory cell is used for preserving the current network resource and the current optimization order of each radio frequency units in the management domain, when having at least two separated networks in the described management domain, described separated network comprises at least one radio frequency units, and any under it in radio frequency units and any radio frequency units of other separated networks do not have neighborhood;
Control unit is used for receiving the incident that radio frequency units reports, and exports wherein network resource information to the optimization unit, and the radio-resource-configuration that will optimize unit output is issued to corresponding radio frequency units;
Optimize the unit and be used for the network resource information of radio frequency units in the updated stored unit, determine the neighbours of radio frequency units according to the current network resource in the memory cell, the radio frequency units that more managing neighbor number is set has the optimization order of elder generation, and the optimization order of storage radio frequency units, and the radio-resource-configuration of determining radio frequency units according to current optimization in proper order.
15. wireless resource management apparatus as WLAN (wireless local area network) as described in the claim 14, it is characterized in that: described wireless resource management apparatus also comprises monitoring unit, be used for adding up the service condition of radio frequency units according to the network resource information of control unit output, when service condition satisfies optimal conditions, export it to optimization unit, when service condition satisfies report condition, report;
Optimizing the unit is the radio frequency units allocation radio resource according to the service condition that receives from monitoring unit.
16. the wireless resource management apparatus as WLAN (wireless local area network) as described in the claim 15 is characterized in that described optimization unit comprises message processing module, resource distribution module and path management module, wherein:
The resource distribution module is used for according to current optimization order, determines the radio-resource-configuration of radio frequency units according to current network resource and/or service parameter;
Path management module is used for determining and the optimization order of storage radio frequency units according to current network resource;
Message processing module is used for from the network resource information of control unit reception and storage radio frequency units, receive the work state information of monitoring unit, call path management module and determine the optimization order of radio frequency units and call the radio-resource-configuration that the resource distribution module is carried out radio frequency units, and export radio-resource-configuration to control unit.
17. the wireless resource management apparatus as WLAN (wireless local area network) as described in the claim 16 is characterized in that: described message processing module receives the network resource information of control module and the service condition of monitoring module with unified interface.
18. the wireless resource management apparatus as WLAN (wireless local area network) as described in the claim 16 is characterized in that: described message processing module when receiving network resource information and/or setting cycle then call path management module.
19. the wireless resource management apparatus as WLAN (wireless local area network) as described in the claim 16 is characterized in that: described message processing module call path management module upgrade the optimization order back of radio frequency units, when receiving service parameter and/or set timer and then call the resource distribution module.
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| US20150003434A1 (en) * | 2013-06-28 | 2015-01-01 | Qualcomm Incorporated | Systems and methods for wireless scanning |
| CN107896373A (en) * | 2017-12-30 | 2018-04-10 | 长沙中天电子设计开发有限公司 | More base station communication methods, system, storage medium and its computer equipment |
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