CN102300229B

CN102300229B - Self-organized wireless local area network and realization method thereof

Info

Publication number: CN102300229B
Application number: CN201110280653.6A
Authority: CN
Inventors: 段慧真; 崔扎根
Original assignee: BEIJING FUGUOHONGXIN TECHNOLOGY Co Ltd
Current assignee: Jiangxi Smart Iot Research Institute Co ltd
Priority date: 2011-09-20
Filing date: 2011-09-20
Publication date: 2014-01-29
Anticipated expiration: 2031-09-20
Also published as: CN102300229A

Abstract

The invention discloses a self-organized wireless local area network and a realization method thereof. A measuring module, a measuring information reporting module and an adjusting module are arranged on a user side in the network; a receiving module, a measuring module, a measuring information reporting module and a self-organized network adjusting module are arranged at an access point (AP) end; and a data acquisition module, a data mining module, a self-configuration/self-optimization analysis module and a self-organized network feedback module are arranged at a background server end, so that automatic networking and network self-optimization functions of the wireless local area network can be realized. Each user under the coverage of the wireless local area network measures wireless transmission information and feeds the measured information back to a background server through an AP, and the background server is used for acquiring and analyzing the measured information fed back by each user, judging whether a coverage or interference problem exists and automatically finishes optimized configuration of the channel and power, so that automatic configuration of a new AP is facilitated. According to the invention, self-configuration of performance parameters of the new AP and self-optimization of a configured AP are finished intelligently and automatically without manual intervention.

Description

The WLAN (wireless local area network) of self-organizing and its implementation

Technical field

The present invention relates to a kind of WLAN (wireless local area network) implementation method of self-organizing and the structure of network system thereof forms, exactly, a kind of method that configures voluntarily, optimizes and heal that relates to WLAN (wireless local area network) of self-organizing, and the structure of this wireless local area network (WLAN) system composition, belong to wireless communication technology field.

Background technology

WLAN (wireless local area network) WLAN(Wireless Local Area Networks) be a kind of data transmission system that can realize very expediently broadband wireless access based on the propelling of IEEE802.11 standard ,You WiFi forum, WLAN (wireless local area network) is to utilize radio frequency technology to replace the local area network (LAN) that traditional copper twisted pairs forms, utilize simple access architecture, just can allow user realize the more satisfactory communication boundary of " information is changed with oneself, facility walk all over the world ".Because WLAN access rate is high, framework is easy to operate, can support mobile computing, many advantages such as system cost is cheap and extensibility is good, at many hot zones, obtain increasingly extensive laying and application, become a bright spot in the field of global information communication in recent years.

Early stage wlan system structure is a kind of autonomous formula system, and in this architecture, 802.11 all functions, i.e. 802.11 physical layers and media access control MAC function, all at access point AP(Access Point) in realize; This AP is called again fat AP.In this WLAN structure, must carry out single management to access point, and also the control of difficult enforcement load balancing, also can not carry out switching fast etc. according to the real-time application demand of speech class, these factors have determined that this network is unwell to large-scale deployment.

The problems such as the resource management of fat AP is complicated in order to solve, consult to be not easy during large-scale network-estabilishing, had proposed Centralized WLAN network structure afterwards, were also the network configuration of thin AP.In this structure, there is a centralized device, i.e. access controller AC(Access Controller).Utilize one or more centralized AC that AP is managed, controlled and configures, at this moment do not need to hold consultation between AP, and coordinate and manage by AC is unified, make WiFi there is well managerial and autgmentability.

It should be noted that no matter be fat AP or thin AP structure, the AP of wlan system is a kind of electronic equipment of plug and play, use very simply, and conventionally do not carry out the network planning and optimization.Yet this has also caused the defects such as the interference of WLAN is larger, and covering performance is left to be desired.

How in WLAN due to user and the AP of a large amount of plug and play being set, and there is no power and a frequency of each AP of reasonable disposition, the wireless environment that more cannot arrange according to WLAN carries out the series of problems such as automatic adjustment of relevant parameter, propose a kind ofly can automatically carry out the method for the network planning, network configuration and optimization thereof, and the problem of relevant device is provided, just become scientific and technical personnel's research focus in the industry.

Summary of the invention

In view of this, WLAN (wireless local area network) and its implementation of the object of this invention is to provide a kind of self-organizing, for solving, do not carry out network planning and optimization because of the AP in WLAN (wireless local area network), thereby cause wlan network hydraulic performance decline, the problems such as QoS of customer is not good, the present invention can not need under the prerequisite of manual intervention and operation, intelligently automatically completes the performance parameter self-configuring of new AP and the self-optimizing of the AP that configured.

In order to reach foregoing invention object, the invention provides the implementation method of a kind of WLAN (wireless local area network) WLAN of self-organizing, it is characterized in that: each user in WLAN coverage measures transmitting information wirelessly, and metrical information by the access point AP(Access Point in WLAN) feed back to WLAN background server, the metrical information of each user feedback is collected and analyzed to WLAN background server, whether judgement exists covers or interference problem, and automatically complete distributing rationally of channel and power, also the automatic configuration of convenient new AP simultaneously, to significantly improve WLAN user's transmission performance, the networking performance of network and robustness, described method comprises following two operating procedures:

(1) each new access point AP carries out the operation of intelligentized self-configuring performance parameter; This step comprises following content of operation:

(11), after new AP powers up, first as a user of WLAN, measure this new AP around operating frequency and the received power information of other AP, and to WLAN background server, initiate the authentication request of access security;

(12), successfully by after secure authentication, this new AP sends the access request of the operating frequency of other AP of surrounding that comprise its measurement and received power information, this new AP position reference information to WLAN background server;

(13) WLAN background server receives the access request of this new AP, obtaining on the reference information basis, position of this new AP transmission, adopts location technology, further locates this new AP position;

(14) WLAN background server is according to this new AP position and the resource allocation information of other AP around thereof, for this new AP calculates and arranges channel resource and the transmitting power of optimization, and channel resource and the transmission power information optimized are handed down to this new AP, guarantee the reasonable covering of many AP and reduce the interference between each AP;

(15) this new AP carries out the configuration of resource and power according to receiving from channel resource and the transmission power information of WLAN background server; Complete after its self-configuring performance parameter operation, allow the user in this AP coverage directly to access, and corresponding data service service is provided;

(2) each network element in WLAN (wireless local area network) is carried out network self-organization operation periodically, solve because of user's movement and around AP startup at any time with close, cause the problem of the interfere with dynamic variation between each AP; This step comprises following content of operation:

(21) excited users of access AP is according to the judgement of the measurement result execution cycle property of the service quality of its current business and wireless signal transmission: if its following three measurement data: in received signal strength RSSI or Signal to Interference plus Noise Ratio SINR, have one to be less than it and to set threshold value, or when frame error rate FER is greater than its setting threshold value, this user just triggers to carry out and measures various transmission performance parameters, and metrical information is fed back to the operation for the AP of its service;

(22) user's metrical information that each AP is received is periodically transmitted to WLAN background server, also the transmission power information of himself is reported to the background server to WLAN periodically simultaneously;

(23) metrical information that each AP that WLAN background server receives it forwards is processed: the metrical information of the user from identical or close positions is carried out to average value processing, calculate and comprise the wlan network performance of wireless coverage, wireless transmission quality and wireless Signal to Interference plus Noise Ratio respectively, and in conjunction with electronic chart, these network performances are shown in to WLAN background server; Meanwhile, WLAN background server, also according to the report of AP, can be known receiving and transmitting signal intensity, the channel of use and the configuration information of transmitting power thereof of each AP;

(24) according to the metrical information of each AP collecting, WLAN background server is analyzed the network performance of each AP, once the network performance parameter that judges certain AP, lower than predetermined threshold value, just triggers immediately the self-optimizing analysis process that starts its cycle;

In this step, the cycle self-optimizing analysis process that WLAN background server is carried out comprises following content of operation:

(241) assess the wireless coverage performance of each AP, calculate its coverage rate: judge that whether the wireless coverage performance of certain AP is lower than predetermined threshold value TCR, if so, perform step (242); Otherwise, redirect execution step (243);

(242) judgement AP current transmit power increases after setting step-length △ P, whether is not more than its maximum transmitting power that allows, and if so, AP increases step-length △ P on current transmit power basis; Otherwise, the transmitting power of this AP is not adjusted, subsequent step (243) is carried out in redirect;

(243) assess the wireless transmission quality of each AP: judge that whether certain AP subordinate's each user's signal to noise ratio or frame error rate are lower than its corresponding predetermined threshold value, whether user's ratio that judgement meets above-mentioned condition is again over default user's ratio threshold T Q, if so, carry out subsequent step (244); Otherwise, finish this self-optimizing analytic process;

(244) whether the contiguous AP that judges this AP uses the channel identical with it: if the frequency duplex factor as one of this channel is less than 3, by the mode of change frequency, revise after the channel configuration of contiguous AP, self-optimizing flow process exits network; Otherwise, carry out subsequent step (245);

(245) judge that the bad region of signal quality, whether in intersecting overlay area, if so, performs step (246); Otherwise, finish this self-optimizing analytic process;

(246) current transmit power that first judges AP reduces to set after step-length △ P, whether is not less than its minimum transmitting power that allows, and if so, AP reduces step-length △ P on the basis of current transmit power; Otherwise, the transmitting power of this AP is not adjusted, directly execution step (25);

(25) WLAN background server is being transmitted to this AP to the self-optimizing analysis result of this AP, and this AP receives after corresponding Optimizing Suggestions parameter, according to this its transmitted power of Optimizing Suggestions parameter adjustment and/or channel frequency; Then, return to execution step (21), enter next wireless measurement cycle method.

In order to reach foregoing invention object, the present invention also provides a kind of WLAN (wireless local area network) wlan system of self-organizing, it is characterized in that: described system comprises: the subscriber equipment of setting up measurement module, metrical information report module and adjusting module, set up the access point AP of receiver module, measurement module, metrical information report module and MANET adjusting module, and the WLAN background server of setting up data acquisition module, data-mining module, self-configuring/self-optimizing analysis module and MANET feedback module: the modules function of wherein setting up is respectively:

The measurement module of subscriber equipment, for position coordinates, signal strength signal intensity, Signal to Interference plus Noise Ratio and the frame error rate of this subscriber equipment of measurements and calculations, then reports module by the metrical information that metrical information is sent to subscriber equipment;

The metrical information of subscriber equipment is reported module, the metrical information of sending for the measurement module of cycle reception subscriber equipment, and report to the AP receiver module in WLAN by wireless transmission method;

The adjusting module of subscriber equipment, the adjustment order of sending for the MANET adjusting module of cycle reception AP, and according to relevant parameter, this subscriber equipment is adjusted;

The receiver module of AP, sends to the information of AP for receiving the metrical information report module of subscriber equipment, then is sent to the metrical information report module of AP;

The measurement module of AP: for transmitting power and the channel configuration information of this AP of measurements and calculations self, then the metrical information that metrical information is sent to AP is reported to module;

The metrical information of AP is reported module, receives the information from the receiver module of AP and the measurement module of AP for the cycle, then is sent to the data acquisition module of WLAN background server;

The MANET adjusting module of AP, for receiving the suggestion of sending from the MANET feedback module of WLAN background server, adjust parameter, and adjust suggestion to each AP configuration relevant parameter according to this, the order that comprises this relevant parameter is sent to the adjusting module of subscriber equipment simultaneously;

Data acquisition module, the metrical information that is used to WLAN background server to receive AP is reported the metrical information that module sends, then sends data-mining module to;

Data-mining module, all information of measuring and calculate for receiving the measurement module that comprises subscriber equipment of data acquisition module block movement and the measurement module of AP, and the metrical information lower than corresponding predetermined threshold value is wherein excavated, and then send to self-configuring/self-optimizing analysis module;

Self-configuring/self-optimizing analysis module, all information that transmit for receiving data-mining module, then these information are analyzed, provide the suggestion of self-configuring/self-optimizing parameter of each AP, and these suggestions are sent to MANET feedback module;

MANET feedback module, the suggestion issuing for being received from configuration/self-optimizing analysis module, then be transmitted to respectively the MANET adjusting module of corresponding AP, to instruct each AP to carry out optimizing and revising of relevant parameter.

The WLAN (wireless local area network) of self-organizing of the present invention and its implementation, because of its plug and play for the AP in WLAN, there is no reasonable disposition transmitted power and operating frequency, more cannot be optimized the problems such as adjustment according to the wireless operational environment automatic phasing related parameter of WLAN, a kind of ad-hoc wireless local area networks implementation method of automatically carrying out the intelligentized network planning, network configuration and the network optimization proposing, and provide requirement and the composition of corresponding network equipment.

The invention has the beneficial effects as follows: can reduce to a great extent the interference of WLAN, improve the covering performance of WLAN, strengthen WLAN networking capability and network performance, improve QoS of customer, and made up the blank of current wireless communication system network self-organizing aspect WLAN, therefore, the present invention has good popularizing application prospect.

Accompanying drawing explanation

Fig. 1 is that wlan network topological structure forms schematic diagram.

Fig. 2 is the implementation method operating process block diagram of WLAN self organizing function of the present invention.

Fig. 3 is the operational flowchart that in the implementation method of WLAN self organizing function of the present invention, self-optimizing is analyzed.

Fig. 4 is that the network architecture of the WLAN of self-organizing of the present invention forms schematic diagram.

Embodiment

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with drawings and Examples, the present invention is described in further detail.

Referring to Fig. 1, the topological structure of introducing wlan network forms: comprise Internet network and following network element: WLAN background server, wireless access point AP (Access Point) and user.Wherein, AP is connected WLAN background server and by wireless link, is connected each user by Internet network respectively.

The implementation method of the WLAN (wireless local area network) WLAN of self-organizing of the present invention is: each user in WLAN coverage measures transmitting information wirelessly, and metrical information is fed back to WLAN background server by the access point AP in WLAN, WLAN background server is collected and the metrical information of analyzing each user feedback, whether judgement exists covers or interference problem, and the channel and the power optimization that automatically complete each AP configure, be issued to again corresponding AP, also the automatic configuration of convenient new AP simultaneously, thereby significantly improve WLAN user's transmission performance, the networking performance of network and robustness.

Referring to Fig. 2, introduce self-configuring in the implementation method of self organizing function of WLAN (wireless local area network) WLAN of the present invention and two operating procedures of self-optimizing:

Step 1, each new access point AP carries out intelligentized following self-configuring performance parameter operation;

(15) this new AP carries out the configuration of resource and power according to receiving from channel resource and the transmission power information of WLAN background server; Complete after its self-configuring performance parameter operation, allow the user in this AP coverage directly to access, and corresponding data service service is provided.

By aforesaid operations, just can complete the self-configuring process of new AP in the wlan network of self-organizing.

Step 2, each network element in WLAN (wireless local area network) is carried out the operation of following network self-organization periodically, solve because of user's movement and around AP startup at any time with close, cause the problem of the interfere with dynamic variation between each AP;

(21) excited users of access AP is according to the judgement of the measurement result execution cycle property of the service quality of its current business and wireless signal transmission: if its following three measurement data: received signal strength RSSI(Received Signal Strength Indication) or Signal to Interference plus Noise Ratio SINR(Signal To Interference plus Noise Ratio) in have one to be less than it and to set threshold T SI or TSINR, or while frame error rate FER(Frame Error Rate) being greater than its setting threshold T FER, this user just triggers the real-time parameter of the various transmission performances of execution measurement periodically and (comprising: received signal strength, Signal to Interference plus Noise Ratio, frame error rate, user position, the signal strength signal intensity of user emission power and around AP etc.), and metrical information is fed back to the operation for the AP of its service.

(22) user's metrical information that each AP is received is periodically transmitted to WLAN background server, also the transmission power information of himself is reported to the background server to WLAN periodically simultaneously.

(23) metrical information that each AP that WLAN background server receives it forwards is processed: the metrical information of the user from identical or close positions is carried out to average value processing, calculate and comprise the wlan network performance of wireless coverage, wireless transmission quality and wireless Signal to Interference plus Noise Ratio respectively, and in conjunction with electronic chart, these network performances are shown in to WLAN background server; Meanwhile, WLAN background server, also according to the report of AP, can be known receiving and transmitting signal intensity, the channel of use and the configuration information of transmitting power thereof of each AP.

(24) according to the metrical information of each AP collecting, WLAN background server is analyzed the network performance of each AP, once the network performance parameter that judges certain AP, lower than predetermined threshold value, just triggers immediately the self-optimizing analysis process that starts its cycle.

(25) WLAN background server is being transmitted to this AP to the self-optimizing analysis result of this AP, and this AP receives after corresponding Optimizing Suggestions parameter, according to this its transmitted power of Optimizing Suggestions parameter adjustment and/or channel frequency; Then, return to execution step (21), enter the next wireless measurement cycle.

Referring to Fig. 3, introduce the concrete operation step of the AP self-optimizing in self-organizing WLAN of the present invention:

(A) trigger self-optimizing analysis process.

(B) WLAN background server is assessed the wireless coverage performance of AP, calculates the coverage rate of AP.

(C) whether the coverage rate that judges AP, lower than threshold T CR, if so, performs step (D), otherwise, jump to step (F).

(D) judgement AP current transmit power increases after step-length △ P, whether is not more than its maximum transmitting power that allows, if so, perform step (E), otherwise, jump to step (F).

(E) AP increases after step-length △ P on the basis of current transmit power, jumps to step (L), finishes this self-optimizing analytic process.

It should be noted that: step (F) is carried out in step (C) or (D), the performance issue that shows system can't not be aspect covering, and prioritization scheme can not be started with from improving coverage rate, therefore, should consider the wireless transmission quality of AP, and carry out following corresponding operating:

(F) calculate Signal to Interference plus Noise Ratio or frame error rate lower than user's ratio of predetermined threshold value, then judge whether user's ratio surpasses default user's ratio threshold T Q, if, perform step (G), otherwise, jump to step (L), finish this self-optimizing analytic process.

(G) judge whether the multiplexing factor of channel frequency between adjacent AP is less than 3, if so, perform step (H), otherwise jump to step (I).

(H), by the mode of change frequency, revise the channel configuration of contiguous AP.

(I) judge that whether the bad region of signal quality is in intersecting overlay area, this step is used for judging whether system problem belonged to the interference problem that covering causes, if, execution step (J), otherwise, jump to step (L), finish this self-optimizing analytic process.

(J) judgement AP current transmit power reduces after step-length △ P, whether is not less than its minimum transmitting power that allows, if so, perform step (K), otherwise, jump to step (L), finish this self-optimizing analytic process.

(K) AP reduces step-length △ P on the basis of current transmit power.

(L) the self-optimizing analysis result of AP finishes.

Referring to Fig. 4, the structure of introducing each network equipment in the wlan network system of self-organizing of the present invention forms: wherein ustomer premises access equipment will be set up following three modules: measurement module, metrical information are reported module and adjusting module, access point AP will set up following four modules: receiver module, measurement module, metrical information are reported module and MANET adjusting module, and WLAN background server will be set up following four modules: data acquisition module, data-mining module, self-configuring/self-optimizing analysis module and MANET feedback module.

Below, the corresponding module that heterogeneous networks equipment is set up is elaborated:

The modules function that user side is set up is:

Subscriber equipment measurement module, for position coordinates, signal strength signal intensity, Signal to Interference plus Noise Ratio and the frame error rate of this subscriber equipment of measurements and calculations, then is sent to metrical information to measure report module.

Subscriber equipment is measured and is reported module, for periodically receiving the measurement data of measurement module, and reports to the AP receiver module in WLAN by wireless transmission method.

Subscriber equipment adjusting module, the adjustment order of sending for periodically receiving AP MANET adjusting module, and according to relevant parameter, this subscriber equipment is adjusted.

The modules function that AP end is set up is:

AP receiver module, sends to the information of AP for receiving subscriber equipment measurement report module, then is sent to AP measurement report module.

AP measurement module: for transmitting power and the channel configuration information of this AP of measurements and calculations self, then metrical information is sent to AP measurement report module.

AP measures and reports module, for periodically receiving the information of AP receiver module and AP measurement module, then is sent to the data acquisition module of WLAN background server.

AP MANET adjusting module, for receiving the suggestion of sending from the MANET feedback module of WLAN background server, adjust parameter, and adjust suggestion to each AP configuration correlated performance parameter according to this, the order that comprises this correlated performance parameter is sent to subscriber equipment adjusting module simultaneously.

The modules function that WLAN background server end is set up is:

Data acquisition module, is used to WLAN background server to receive AP and measures the information of reporting module transmission, then send data-mining module to.

Data-mining module, for receiving all information that user's measurement module and AP measurement module are measured and calculated that comprise of data acquisition module block movement, and the metrical information lower than corresponding predetermined threshold value is wherein excavated, and then send to self-configuring/self-optimizing analysis module.

MANET feedback module, the suggestion issuing for being received from configuration/self-optimizing analysis module, then be transmitted to respectively the MANET adjusting module of corresponding AP, to instruct it to carry out optimizing and revising of relevant parameter.

It should be noted that, the method for automatically carrying out network configuration and the network optimization that the present invention proposes not only can be applicable to, in WLAN (wireless local area network), also can be applicable to the radio honeycomb communication systems such as 3G, B3G, 4G.

The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.

Claims

1. the implementation method of the WLAN (wireless local area network) WLAN of a self-organizing, it is characterized in that: each user in WLAN coverage measures transmitting information wirelessly, and metrical information is fed back to WLAN background server by the access point AP in WLAN, the metrical information of each user feedback is collected and analyzed to WLAN background server, whether judgement exists covers or interference problem, and automatically complete distributing rationally of channel and power, also the automatic configuration of convenient new AP simultaneously, to significantly improve WLAN user's transmission performance, the networking performance of network and robustness; Described method comprises following two operating procedures:

(1), according to radio configuration information and the Cover Characteristics of existing AP in background server, for new, install or the new new AP starting carries out the operation of intelligentized self-configuring performance parameter; This step comprises following content of operation:

(242) judgement AP current transmit power increases after setting step-length △ P, whether is not more than its maximum transmitting power that allows, and if so, AP increases step-length △ P on current transmit power basis, finishes this self-optimizing analytic process; Otherwise, the transmitting power of this AP is not adjusted, subsequent step (243) is carried out in redirect;

2. method according to claim 1, it is characterized in that: in described step (21), the real time information of the transmission performance of described user's period measurement comprises: received signal strength, Signal to Interference plus Noise Ratio, frame error rate, user position, user emission power and the around signal strength signal intensity of AP and the channel of use.

3. the WLAN (wireless local area network) wlan system of a self-organizing, it is characterized in that: described system comprises: the subscriber equipment of setting up measurement module, metrical information report module and adjusting module, set up the access point AP of receiver module, measurement module, metrical information report module and MANET adjusting module, and the WLAN background server of setting up data acquisition module, data-mining module, self-configuring/self-optimizing analysis module and MANET feedback module: the modules function of wherein setting up is respectively:

The metrical information of subscriber equipment is reported module, the metrical information of sending for the measurement module of cycle reception subscriber equipment, and report the receiver module to the AP in WLAN by wireless transmission method;