CN103796277A - Method, system and device for indicating beacon frame sending and sending beacon frame - Google Patents

Method, system and device for indicating beacon frame sending and sending beacon frame Download PDF

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CN103796277A
CN103796277A CN201210418682.9A CN201210418682A CN103796277A CN 103796277 A CN103796277 A CN 103796277A CN 201210418682 A CN201210418682 A CN 201210418682A CN 103796277 A CN103796277 A CN 103796277A
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beacon frame
time point
frame time
center
section
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CN103796277B (en
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赵伟
盛凌志
王文明
张志敏
石伟
杜建凤
李智伟
姜欣
吴茜
韩志峰
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China Mobile Group Beijing Co Ltd
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China Mobile Group Beijing Co Ltd
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Abstract

本发明涉及无线通信领域，尤其涉及一种指示信标帧发送和发送信标帧的方法、系统和装置，以解决AP发送的信标帧之间，信标帧与数据帧之间易发生冲突和退避，为了避免冲突，可以提高信标帧的发送周期，但会增加终端的网络接入时长的问题。本发明实施例采用确定AP一个发送信标帧周期内的空闲时间段；在确定的空闲时间段内确定部分或全部AP对应的信标帧时间点，不同AP对应的信标帧时间点不同；为部分或全部AP配置对应的信标帧时间点，指示AP在对应的信标帧的时间点到达后发送信标帧的方法。避免了各帧之间发生冲突，或终端的接入时长增加的问题，减少了信标帧之间，信标帧和数据帧之间的干扰，提高了信标帧信号的稳定性和可靠性。

The present invention relates to the field of wireless communication, in particular to a method, system and device for instructing and sending beacon frames, so as to solve the conflict between beacon frames sent by AP and between beacon frames and data frames and backoff, in order to avoid conflicts, the sending period of the beacon frame can be increased, but it will increase the network access time of the terminal. The embodiment of the present invention adopts the method of determining the idle time period within one period of the AP sending a beacon frame; within the determined idle time period, the beacon frame time points corresponding to some or all APs are determined, and the beacon frame time points corresponding to different APs are different; Configure the corresponding beacon frame time point for some or all APs, and instruct the AP to send the beacon frame after the corresponding beacon frame time point arrives. It avoids the conflict between frames or the increase of terminal access time, reduces the interference between beacon frames, beacon frames and data frames, and improves the stability and reliability of beacon frame signals .

Description

A kind of mthods, systems and devices of indicating beacon frame to send and send beacon frame
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of mthods, systems and devices of indicating beacon frame to send and send beacon frame.
Background technology
WLAN (Wireless Local Area Networks; WLAN) the main frame that transmits three types in: Frame, control frame and management frames.Frame is mainly used in transfer of data, and control frame is mainly used in controlling for the access of medium, and management frames (as beacon frame) is used for exchange of management information.Wherein the load mode of Frame and management frames is identical.
Wireless access points (Access Point; AP) each wireless network clients is connected together, then by wireless network access network based on ethernet.AP meeting periodic broadcasting beacon frame, wireless terminal carrys out discovering network by listen for beacons frame.But in residential block, the scenario A P very dense such as Exhibition Centers, stadiums, the expense of the management frames of WLAN is very large.
The cycle of AP is 100ms, within the one-period time, have multiple AP and send beacon frame, if the beacon frame transmitting time between AP differs and is less than beacon frame and sends required duration, will cause conflict, the beacon frame of rear transmission can be kept out of the way the beacon frame of previous AP, be sent completely until work as the beacon frame of previous AP, after channel idle, just can send a rear beacon frame, because the difference of the timestamp between the beacon frame of these two AP is fixed, will cause each cycle that the conflict between fixing beacon frame can occur, easily there is jitter, the problem such as go offline.
In addition, because the load mode of Frame and management frames is identical, but the priority of management frames is higher than normal data frame.Therefore, under the intensive scene of AP, in the AP cycle, the management frames (beacon frame) of all AP can be randomly dispersed in one-period time range, can cause the lasting conflict of Frame and keep out of the way, and increases and disturbs, and affects entire system throughput.
In prior art, the main method that addresses the above problem employing is the transmission cycle of improving beacon frame, but can increase like this access duration of terminal, extends the time of terminal searching network.
Summary of the invention
The embodiment of the present invention provides a kind of mthods, systems and devices of indicating beacon frame to send and send beacon frame, the problem being extended to solve the network insertion duration of terminal in prior art.
The embodiment of the present invention provides a kind of method of indicating beacon frame to send, and the method comprises:
Determine free time section sending in the beacon frame cycle of wireless access points AP; In described free time of determining determining section or whole beacon frame time point corresponding to AP in section, the beacon frame time point difference that wherein different AP are corresponding; For part or all of AP configures corresponding beacon frame time point, indication AP sends beacon frame after the time point of corresponding beacon frame arrives.
The embodiment of the present invention provides a kind of method that sends beacon frame, and the method comprises:
Receive part or all of AP and configure corresponding beacon frame time point; Configure corresponding beacon frame time point transmission beacon frame according to receiving part or all of AP.
The embodiment of the present invention provides a kind of access control unit AC that indicates beacon frame to send, and this access control unit comprises:
Determine free time section sending in the beacon frame cycle of wireless access points AP; In described free time of determining determining section or whole beacon frame time point corresponding to AP in section, the beacon frame time point difference that wherein different AP are corresponding; Transmitting portion or all beacon frame time point corresponding to AP.
The embodiment of the present invention provides a kind of wireless access points AP that sends beacon frame, and this AP comprises:
Receive part or all of AP and configure corresponding beacon frame time point; Configure corresponding beacon frame time point transmission beacon frame according to receiving part or all of AP.
The embodiment of the present invention provides a kind of device of indicating beacon frame to send, and this device comprises:
Free time section determination module: for determining that mono-of wireless access points AP sends the free time section in the beacon frame cycle;
Beacon frame time point determination module: in described free time of determining determining section or whole beacon frame time point corresponding to AP in section, the beacon frame time point difference that wherein different AP are corresponding;
Configuration module: be used to part or all of AP to configure corresponding beacon frame time point, indication AP sends beacon frame after the time point of corresponding beacon frame arrives.
The embodiment of the present invention provides a kind of device that sends beacon frame, and this device comprises:
Receiver module: configure corresponding beacon frame time point for receiving part or all of AP;
Sending module: for configuring corresponding beacon frame time point transmission beacon frame according to receiving part or all of AP.
The embodiment of the present invention adopts determines free time section sending in the beacon frame cycle of wireless access points AP; In described free time of determining determining section or whole beacon frame time point corresponding to AP in section, the beacon frame time point difference that wherein different AP are corresponding; For part or all of AP configures corresponding beacon frame time point, indication AP sends the method for beacon frame after the time point of corresponding beacon frame arrives.Avoid because AP quantity is more, between the beacon frame that AP sends, between beacon frame and Frame, easily clash and keep out of the way, can cause signal to disturb, the situation of jitter, and avoid in prior art, in order reducing between beacon frame, conflicting between beacon frame and Frame, to improve beacon frame and send the cycle, cause the access duration of terminal to increase, terminal is found the problem of the time lengthening of network.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of a kind of method of indicating beacon frame transmission in the embodiment of the present invention;
Fig. 2 is the schematic diagram of determining the time point of the beacon frame that whole AP are corresponding in the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of indicating the concrete grammar of beacon frame transmission in the embodiment of the present invention;
Fig. 4 is the schematic flow sheet of a kind of method that sends beacon frame in the embodiment of the present invention;
Fig. 5 is the schematic diagram of a kind of device of indicating beacon frame transmission in the embodiment of the present invention;
Fig. 6 is the schematic diagram of a kind of device that sends beacon frame in the embodiment of the present invention;
Fig. 7 also provides a kind of schematic diagram of system of indicating beacon frame to send and send beacon frame for the embodiment of the present invention.
Embodiment
The embodiment of the present invention adopts determines free time section sending in the beacon frame cycle of wireless access points AP; In described free time of determining determining section or whole beacon frame time point corresponding to AP in section, the beacon frame time point difference that wherein different AP are corresponding; For part or all of AP configures corresponding beacon frame time point, indication AP sends the method for beacon frame after the time point of corresponding beacon frame arrives.Avoid because AP quantity is more, between the beacon frame that AP sends, between beacon frame and Frame, easily clash and keep out of the way, can cause signal to disturb, the situation of jitter, and avoid in prior art, in order to reduce between beacon frame, conflicting between beacon frame and Frame, improve beacon frame and send the cycle, cause the access duration of terminal to increase, terminal is found the problem of the time lengthening of network, reduced between beacon frame, the interference between beacon frame and Frame, has improved stability and the reliability of beacon frame signal.
Whole in an access control unit AC can mutual perception the signal AP of transmitting be called as the own AP of this AC.An access control unit AC can contain multiple frequencies, has several own AP on each frequency, and the embodiment of the present invention, take the whole own AP of a frequency of an AC as example is described, will be had AP by oneself referred to as AP.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
As shown in Figure 1, be a kind of method of indicating beacon frame to send in the embodiment of the present invention, comprising:
Step 101: access control unit AC determines free time section sending in the beacon frame cycle of wireless access points AP;
Step 102:AC is determining section or whole beacon frame time point corresponding to AP in definite free time section, the beacon frame time point difference that wherein different AP are corresponding;
Step 103:AC is that part or all of AP configures corresponding beacon frame time point, and indication AP sends beacon frame after the time point of corresponding beacon frame arrives.
Wherein, in step 101, AC determines free time section sending in the beacon frame cycle of AP, comprise: the cycle of a transmission beacon frame of AP, may there is several free time section, each free time, the length of section may be not identical, can select any one free time section as in AC partly or entirely AP send time period of beacon frame, preferably, send maximum in beacon frame cycle free time section using one and send time period of beacon frame as part or all of AP.Wherein, free time section refer to, within this time period, do not send any frame, comprise and do not send beacon frame.
If one free time section cannot send the beacon frame of whole AP, can determine again that one or more free time section sends time period of beacon frame as residue AP, wherein determine again one or more free time section can be before definite free time section, also can be after definite free time section.
In step 102, in definite free time section determining section or all beacon frame time point corresponding to AP comprise: first determine center AP, by definite free time, the start time point of section is configured to the beacon frame time point of center AP, then determine that according to center AP other AP send the time point of beacon frame, concrete grammar is as follows.
Center AP determines: in the AP composition set that need to distribute beacon frame time point, the quantity transmitting that can perceive other AP to each AP sorts, and can perceive AP that the quantity that transmits of other AP is maximum as center AP.
According to center AP, other AP are divided into groups: by center AP, center AP can perceive transmit AP, and the AP transmitting that can perception center AP forms a central. set, and each AP in this group can be perceived to the AP transmitting, and the AP transmitting that can perceive at least one AP in this group in other AP outside this group forms a particular group.If now also have ungrouped AP, all AP in all ungrouped AP and particular group are formed to new set, and particular group is deleted, in new set, determine Yi Ge center AP.To newly gather Zhong center AP, new set Zhong center AP can perceive the AP transmitting, and the AP transmitting that can perceive new set Zhong center AP forms another central. set, and each AP in this group can be perceived to the AP transmitting, and the AP transmitting that can perceive at least one AP in this group in other AP outside this group forms a particular group.If now also have ungrouped AP, repeat all AP in all ungrouped AP and particular group to form new set, delete particular group, and determine and can perceive the maximum center AP of the quantity that transmits of other AP in new set, return center AP, center AP can perceive the AP transmitting, and the AP transmitting that can perceive center AP forms the step of a central. set.
After the AP that all need to distribute beacon frame time point has been divided into groups, whether the idle time period that needs judgement to determine is not less than the required duration that sends the beacon frame that whole AP are corresponding; The idle time period of wherein determining is less than the required duration that sends the beacon frame that whole AP are corresponding, determines that the method for the time point of the beacon frame that whole AP are corresponding has two kinds, is introduced respectively below.
Determine the method one of the time point of the beacon frame that whole AP are corresponding:
Be one take the free time section of determining and send maximum in beacon frame cycle free time section as example, calculate the required duration that sends the beacon frame that whole AP are corresponding.
Send required duration=(the interval frame SIFS of the duration+priority of a beacon frame) n of the beacon frame that whole AP are corresponding, the quantity that wherein n is whole AP; Or
Send required duration=(the interval frame SIFS/2 of the duration+priority of a beacon frame) n of the beacon frame that whole AP are corresponding, the quantity that wherein n is whole AP.
Judge whether the maximum idle time period is not less than the required duration that sends the beacon frame that whole AP are corresponding; If the maximum idle time period is not less than the required duration that sends the beacon frame that whole AP are corresponding, the whole APs of AC in being just every group according to the order of dividing into groups distribute corresponding beacon frame time point; If the maximum idle time period is less than the required duration that sends the beacon frame that whole AP are corresponding, calculate the quantity that maximum idle time can send the beacon frame of AP, just according to the order of grouping, the part or all of AP in being every group distributes corresponding beacon frame time point to AC; AC redefines other free time section again, returns and judges whether the idle time period is not less than the step of the required duration that sends the beacon frame that whole AP are corresponding.Wherein, the beacon frame of the AP of the preferential dispatching centre group of AP, after whole beacon frames of central. set AP are sent completely, then sends the beacon frame of particular group AP.
As shown in Figure 2, after AC divides into groups to whole AP, symbiosis has become three groupings: the first central. set, the second central. set and particular group.AC, by calculating, sends the beacon frame of whole AP to need 25ms.Meanwhile, AC determines that a maximum idle time section sending in the beacon frame cycle is 15ms.Now maximum idle time section is less than the duration of the beacon frame transmission of whole AP, the center AP using the starting point of maximum idle time section as the first central. set sends the starting point of beacon frame, and according to order of packets, determine successively the beacon frame time point corresponding to AP of the first central. set, the second central. set and particular group; After the 3rd beacon frame time point corresponding to AP of the second central. set determined, the duration of the remaining maximum idle time section beacon frame that AP of less than is corresponding, carries out mark by the 4th AP of the second central. set; AC determine again one free time section, using definite free time again section starting point as the time point of the 4th beacon frame that AP is corresponding of the second central. set, and according to order of packets, continue to determine beacon frame time point corresponding to residue AP.
Determine the method two of the time point of the beacon frame that whole AP are corresponding:
Be one take the free time section of determining and send maximum in beacon frame cycle free time section as example, calculate the required duration that sends the beacon frame that whole AP are corresponding.
Send required duration=(the interval frame SIFS of the duration+priority of a beacon frame) n of the beacon frame that whole AP are corresponding, the quantity that wherein n is whole AP; Or
Send required duration=(the interval frame SIFS/2 of the duration+priority of a beacon frame) n of the beacon frame that whole AP are corresponding, the quantity that wherein n is whole AP.
Judge whether the maximum idle time period is not less than the required duration that sends the beacon frame that whole AP are corresponding; If the maximum idle time period is not less than the required duration that sends the beacon frame that whole AP are corresponding, the whole APs of AC in being just every group according to the order of dividing into groups distribute corresponding beacon frame time point; If the maximum idle time period is less than the required duration that sends the beacon frame that whole AP are corresponding, part or all of AP in being every group according to the order of grouping distributes corresponding beacon frame time point, wherein, in maximum idle time section, do not obtain the AP of corresponding beacon frame time point, still send beacon frame according to the original pre-configured beacon frame time point of AP, concrete grammar is as follows.
After AC divides into groups to whole AP, symbiosis has become three groupings: the first central. set, the second central. set and particular group.AC, by calculating, sends the beacon frame of whole AP to need 25ms.Meanwhile, AC determines that a maximum idle time section sending in the beacon frame cycle is 15ms.Now maximum idle time section is less than the duration of the beacon frame transmission of whole AP, the center AP using the starting point of maximum idle time section as the first central. set sends the starting point of beacon frame, and according to order of packets, determine successively the beacon frame time point corresponding to AP of the first central. set, the second central. set and particular group, after beacon frame time point corresponding some AP of the second central. set has been determined, the duration of the remaining maximum idle time section beacon frame that AP of less than is corresponding, this AP AP below in the second central. set, and whole AP of particular group still send beacon frame according to original pre-configured beacon frame time point, due to the AP after this AP in the second central. set, and the original pre-configured beacon frame time point of whole AP of particular group can be in definite free time section, therefore, can not distribute corresponding beacon frame time point to produce to remaining AP in whole AP of the first central. set of determining according to the order of grouping in free time section and the second central. set disturbs.
The duration that is spaced apart a beacon frame of the time point of the beacon frame of two AP and the interval SIFS of priority and; Or the interval SIFS of the duration that is spaced apart a beacon frame of the time point of the beacon frame of two AP and 1/2nd priority and.
In step 103, AC is that part or all of AP configures corresponding beacon frame time point and has three kinds of methods, is introduced respectively below.
AC is that part or all of AP configures corresponding beacon frame time point method one, revises the time interval of AP transmission beacon frame:
For an AP that need to configure beacon frame time point, AC determines the pre-configured beacon frame time point of this AP and the difference of beacon frame time point that needs configuration; AC using the duration in the initialization beacon frame cycle of this AP and definite difference and as this AP duration in current transmission beacon frame cycle, and using the duration in initialization beacon frame cycle as after the duration in transmission beacon frame cycle.
Configure corresponding beacon frame time point with whole AP of the first central. set, the duration in the initialization beacon frame cycle of AP is that 100ms is example, supposes to have 5 AP in the first central. set, is respectively W, X, Y, Z and center AP.Wherein W, X, the pre-configured beacon frame time point of Y, Z are respectively 0.5ms, 3ms, 2ms and 1.5ms with the difference of the beacon frame time point that needs configuration.AC calculates respectively the duration in 4 current transmission beacon frame cycles of AP.
Duration=the 100ms+0.5ms in the current transmission beacon frame cycle of W;
Duration=the 100ms+3ms in the current transmission beacon frame cycle of X;
Duration=the 100ms+2ms in the current transmission beacon frame cycle of Y;
Duration=the 100ms+1.5ms in the current transmission beacon frame cycle of Z.
By the W calculating, X, Y, the duration in the current transmission beacon frame cycle of Z is as W, X, Y, the duration in current transmission beacon frame cycle of Z, now current beacon frame sends W in transmission cycle of next beacon frame corresponding to cycle, X, Y, the beacon frame time point of Z can change, by W in the transmission cycle of next beacon frame corresponding current beacon frame transmission cycle, X, Y, the beacon frame time point of Z, as W, X, Y, the corresponding beacon frame time point of Z configuration, and send transmission cycle of next beacon frame corresponding to cycle using the duration in initialization beacon frame cycle (100ms) as current beacon frame, and beacon frame afterwards sends the duration in cycle.
AC is that part or all of AP configures corresponding beacon frame time point method two, directly revises the timestamp of AP transmission beacon frame:
For an AP that need to configure beacon frame time point, AC determines the pre-configured beacon frame time point of this AP and the difference of beacon frame time point that needs configuration; AC using the timestamp of the initialization beacon frame of this AP and definite difference and send the timestamp of beacon frame as this AP.
Configure corresponding beacon frame time point as example take whole AP of the first central. set, suppose to have 5 AP in the first central. set, be respectively W, X, Y, Z and center AP.The timestamp of ACJiang center AP is directly revised as the starting point of definite free time section, and W, X, the pre-configured beacon frame time point of Y, Z are respectively 0.5ms, 3ms, 2ms and 1.5ms with the difference of the beacon frame time point that needs configuration; Corresponding is that timestamp is respectively 1000 μ s, 2000 μ s, 3000 μ s, 4000 μ s.Calculate respectively the timestamp of the transmission beacon frame that W, X, Y, Z need to configure.
Timestamp=1000 μ the s+0.5ms of the transmission beacon frame that W need to configure;
Timestamp=2000 μ the s+3ms of the transmission beacon frame that X need to configure;
Timestamp=3000 μ the s+2ms of the transmission beacon frame that Y need to configure;
Timestamp=4000 μ the s+1.5ms of the transmission beacon frame that Z need to configure.
The timestamp of the transmission beacon frame that needs corresponding to W, X, Y, Z that calculate configure is exactly that AC is respectively W, X, Y, Z configure corresponding beacon frame time point.
AC is that part or all of AP configures corresponding beacon frame time point method three, and modification AP sends the timestamp of beacon frame relatively:
For an AP that need to configure beacon frame time point, AC determines the difference of the beacon frame time point of beacon frame time point that this AP need to configure and center AP; ACJiang center AP sends the timestamp of beacon frame and definite timestamp difference and send beacon frame as this AP.
Configure corresponding beacon frame time point as example take whole AP of the first central. set, suppose to have 5 AP in the first central. set, be respectively W, X, Y, Z and center AP.The timestamp of the initialization beacon frame of the AP of AC computer center and definite free time section the difference of start time point, by the timestamp of the initialization beacon frame of center AP and above-mentioned difference and, the timestamp of the transmission beacon frame configuring as center AP, supposes that the timestamp of the transmission beacon frame of center AP configuration is 1000 μ s.
Calculate respectively the difference of the time point of beacon frame of W, X, Y, Z configuration and the time point of the transmission beacon frame of center AP configuration, suppose difference 2.5ms, 5ms, 7.5ms, 10ms respectively corresponding to W, X, Y, Z calculating.
The timestamp of the transmission beacon frame of W, X, configuration that Y, Z are corresponding equal the timestamp of transmission beacon frame of center AP configuration and corresponding difference and.That is:
Timestamp=1000 μ the s+2.5ms of the transmission beacon frame of the configuration that W is corresponding;
Timestamp=1000 μ the s+5ms of the transmission beacon frame of the configuration that X is corresponding;
Timestamp=1000 μ the s+7.5ms of the transmission beacon frame of the configuration that Y is corresponding;
Timestamp=1000 μ the s+10ms of the transmission beacon frame of the configuration that Z is corresponding
The timestamp of the transmission beacon frame that needs corresponding to W, X, Y, Z that calculate configure is exactly that AC is respectively W, X, Y, Z configure corresponding beacon frame time point.
As shown in Figure 3, for the concrete grammar of indicating beacon frame to send in the embodiment of the present invention, comprise the following steps:
Step 301:AC, in the AP composition set that need to distribute beacon frame time point, determines center AP;
Step 302:AC is by center AP, and center AP can perceive the AP transmitting, and the AP transmitting that can perceive center AP forms a central. set;
Each AP in this group can be perceived the AP transmitting by step 303:AC, and in other AP outside this group, can perceive the AP that transmits signals at least one AP in this group and form a particular group;
Step 304:AC has judged whether ungrouped AP, if having, and execution step 305, if do not have, execution step 306;
The all AP in all ungrouped AP and particular group are formed new set by step 305:AC, and particular group is deleted, execution step 301;
Step 306:AC determines free time section sending in the beacon frame cycle of wireless access points AP;
According to the order of grouping, the whole AP in being every group distribute corresponding beacon frame time point to step 307:AC;
The whole APs of step 308:AC in being every group configure corresponding beacon frame time point, and indication AP sends beacon frame after the time point of corresponding beacon frame arrives.
Shown in Fig. 4, be a kind of method that sends beacon frame in the embodiment of the present invention, comprise:
Step 401: wireless access points AP receives part or all of AP and configures corresponding beacon frame time point;
Step 402:AP configures corresponding beacon frame time point transmission beacon frame according to receiving part or all of AP.
In step 401, the part or all of AP that wireless access points AP may receive two kinds of forms configures corresponding beacon frame time point, is described respectively below.
What the first form AP received is the duration that each AP configures the corresponding transmission beacon frame cycle, and the duration that configures the corresponding transmission beacon frame cycle according to each AP determines that each AP configures corresponding beacon frame time point.
What the second form AP received is the timestamp that each AP configures corresponding transmission beacon frame, determines that according to the timestamp of the transmission beacon frame of the corresponding configuration of each AP each AP configures corresponding beacon frame time point.
Based on same inventive concept, a kind of device of indicating beacon frame to send is also provided in the embodiment of the present invention, because the principle that this device is dealt with problems is similar to a kind of method of indicating beacon frame to send of the embodiment of the present invention, therefore the enforcement of this device can be referring to the enforcement of method, repeats part and repeat no more.
As shown in Figure 5, be a kind of device of indicating beacon frame to send in the embodiment of the present invention, comprising:
Free time section determination module 501, for determining free time section sending in the beacon frame cycle of wireless access points AP;
Beacon frame time point determination module 502, for determining section in definite free time section or whole beacon frame time point corresponding to AP, the beacon frame time point difference that wherein different AP are corresponding;
Configuration module 503, is used to part or all of AP to configure corresponding beacon frame time point, and indication AP sends beacon frame after the time point of corresponding beacon frame arrives.
Wherein, free time section determination module 501 specifically for, determine free time section sending in the beacon frame cycle of AP, comprise: the cycle of a transmission beacon frame of AP, may there is several free time section, each free time, the length of section may be not identical, can select any one free time section as in AC partly or entirely AP send time period of beacon frame, preferably, send maximum in beacon frame cycle free time section using one and send time period of beacon frame as part or all of AP.
If one free time section cannot send the beacon frame of whole AP, can determine again that one or more free time section sends time period of beacon frame as residue AP, wherein determine again one or more free time section can be before definite free time section, also can be after definite free time section.
Beacon frame time point determination module 502 specifically for: determine center AP, by definite free time, the start time point of section is configured to the beacon frame time point of center AP, then determines that according to center AP other AP send the time point of beacon frames.
Center AP determines: in the AP composition set that need to distribute beacon frame time point, the quantity transmitting that can perceive other AP to each AP sorts, and can perceive other AP and transmit the maximum AP of quantity as center AP.
According to center AP, other AP are divided into groups: by center AP, center AP can perceive the AP transmitting, and the AP transmitting that can perception center AP forms a central. set, and each AP in this group can be perceived to the AP transmitting, and the AP transmitting that can perceive at least one AP in this group in other AP outside this group forms a particular group.If now also have ungrouped AP, all AP in all ungrouped AP and particular group are formed to new set, and particular group is deleted, in new set, determine Yi Ge center AP.To newly gather Zhong center AP, new set Zhong center AP can perceive the AP transmitting, and the AP transmitting that can perceive new set Zhong center AP forms another central. set, and each AP in this group can be perceived to the AP transmitting, and the AP transmitting that can perceive at least one AP in this group in other AP outside this group forms a particular group.If now also have ungrouped AP, repeat all AP in all ungrouped AP and particular group to form new set, delete particular group, and determine and can perceive the maximum center AP of the quantity that transmits of other AP in new set, return center AP, center AP can perceive the AP transmitting, and the AP transmitting that can perceive center AP forms the step of a central. set.
After the AP that all need to distribute beacon frame time point has been divided into groups, whether the idle time period that needs judgement to determine is not less than the required duration that sends the beacon frame that whole AP are corresponding; The idle time period of wherein determining is less than the required duration that sends the beacon frame that whole AP are corresponding, determines that the method for the time point of the beacon frame that whole AP are corresponding has two kinds, in the step 102 of Fig. 1, introduces in detail, does not repeat them here.
In configuration module 503, AC is that part or all of AP configures corresponding beacon frame time point and has three kinds of methods: revise AP and send the time interval of beacon frame, connect the timestamp of revising AP and send beacon frame, revise AP and relatively send the timestamp of beacon frame; In the step 103 of Fig. 1, respectively three kinds of methods are described in detail, do not repeat them here.
As shown in Figure 6, be a kind of device that sends beacon frame in the embodiment of the present invention, comprising:
Receiver module 601: configure corresponding beacon frame time point for receiving part or all of AP;
Sending module 602: for configuring corresponding beacon frame time point transmission beacon frame according to receiving part or all of AP.
The part or all of AP that may receive two kinds of forms in receiver module 601 configures corresponding beacon frame time point, is described respectively below.
What the first form AP received is the duration that each AP configures the corresponding transmission beacon frame cycle, and the duration that configures the corresponding transmission beacon frame cycle according to each AP determines that each AP configures corresponding beacon frame time point.
What the second form AP received is the timestamp that each AP configures corresponding transmission beacon frame, determines that according to the timestamp of the transmission beacon frame of the corresponding configuration of each AP each AP configures corresponding beacon frame time point.
As shown in Figure 7, the embodiment of the present invention also provides a kind of system of indicating beacon frame to send and send beacon frame, contains access control unit 710 and multiple wireless access points 711 in this system.
Access control unit 710, for determining free time section sending in the beacon frame cycle of wireless access points AP; In described free time of determining determining section or whole beacon frame time point corresponding to AP in section, the beacon frame time point difference that wherein different AP are corresponding; Transmitting portion or all beacon frame time point corresponding to AP.
Wireless access points 711, for receiving corresponding AP configuration beacon frame time point; Send beacon frame according to receiving corresponding AP configuration beacon frame time point.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the modification of the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (20)

1. a method of indicating beacon frame to send, is characterized in that, the method comprises:
Determine free time section sending in the beacon frame cycle of wireless access points AP;
In described free time of determining determining section or whole beacon frame time point corresponding to AP in section, the beacon frame time point difference that wherein different AP are corresponding;
For part or all of AP configures corresponding beacon frame time point, indication AP sends beacon frame after the time point of corresponding beacon frame arrives.
2. the method for claim 1, is characterized in that, described described free time determining before determining section or beacon frame time point that all AP is corresponding, comprising in section:
Can perceive AP that the quantity that transmits of other AP is maximum as center AP;
By definite free time, the start time point of section is configured to the beacon frame time point of center AP.
3. method as claimed in claim 2, is characterized in that, describedly configures corresponding beacon frame time point for part or all of AP, comprising:
For an AP that need to configure beacon frame time point, determine the pre-configured beacon frame time point of this AP and the difference of beacon frame time point that needs configuration;
Using the duration in the initialization beacon frame cycle of this AP and definite difference and as this AP duration in current transmission beacon frame cycle, and using the duration in initialization beacon frame cycle as after the duration in transmission beacon frame cycle.
4. method as claimed in claim 2, is characterized in that, describedly configures corresponding beacon frame time point for part or all of AP, comprising:
For an AP that need to configure beacon frame time point, determine the pre-configured beacon frame time point of this AP and the difference of beacon frame time point that needs configuration;
Using the timestamp of the initialization beacon frame of this AP and definite difference and send the timestamp of beacon frame as this AP.
5. method as claimed in claim 2, is characterized in that, describedly configures corresponding beacon frame time point for part or all of AP, comprising:
For an AP that need to configure beacon frame time point, determine the difference of the beacon frame time point of beacon frame time point that this AP need to configure and center AP configuration;
Using the timestamp of the transmission beacon frame of center AP configuration and definite difference and send the timestamp of beacon frame as this AP.
6. method as described in as arbitrary in claim 2 ~ 5, is characterized in that, described described free time determining is determining section or whole beacon frame time point corresponding to AP in section, comprising:
In the AP composition set that need to distribute beacon frame time point, determine the maximum center AP of the quantity that transmits that can perceive other AP;
By center AP, center AP can perceive the AP transmitting, and the AP transmitting that can perceive center AP forms a central. set, and each AP in this group can be perceived to the AP transmitting, and the AP transmitting that can perceive at least one AP in this group in other AP outside this group forms a particular group;
Judge whether to also have ungrouped AP, if have, the all AP in all ungrouped AP and particular group are formed to new set, delete particular group, and determine and can perceive the maximum center AP of the quantity that transmits of other AP in new set, return center AP, center AP can perceive the AP transmitting, and the AP transmitting that can perceive center AP forms the step of a central. set;
Otherwise just according to the order of grouping, the whole AP in being every group distribute corresponding beacon frame time point.
7. the method for claim 1, is characterized in that, before determining the beacon frame time point that one group of AP is corresponding in section, comprising in described free time of determining:
Judge whether definite free time section is not less than the required duration that sends the beacon frame that whole AP are corresponding;
If so, configure corresponding beacon frame time point for whole AP; Otherwise, for part AP configures corresponding beacon frame time point.
8. method as claimed in claim 7, is characterized in that, described for after part AP configures corresponding beacon frame time point, also comprises:
Determine other section sending in the beacon frame cycle free time, determine beacon frame time point corresponding to remaining AP in other of determining in section free time, and configure corresponding beacon frame time point for remaining AP.
9. a method that sends beacon frame, is characterized in that, the method comprises:
Receive part or all of AP and configure corresponding beacon frame time point;
Configure corresponding beacon frame time point transmission beacon frame according to receiving part or all of AP.
10. an access control unit AC who indicates beacon frame to send, is characterized in that, this access control unit comprises:
Determine free time section sending in the beacon frame cycle of wireless access points AP;
In described free time of determining determining section or whole beacon frame time point corresponding to AP in section, the beacon frame time point difference that wherein different AP are corresponding;
Transmitting portion or all beacon frame time point corresponding to AP.
11. 1 kinds send the wireless access points AP of beacon frame, it is characterized in that, this AP comprises:
Receive corresponding AP configuration beacon frame time point;
Send beacon frame according to receiving corresponding AP configuration beacon frame time point.
12. 1 kinds of devices of indicating beacon frame to send, is characterized in that, this device comprises:
Free time section determination module: for determining that mono-of wireless access points AP sends the free time section in the beacon frame cycle;
Beacon frame time point determination module: in described free time of determining determining section or whole beacon frame time point corresponding to AP in section, the beacon frame time point difference that wherein different AP are corresponding;
Configuration module: be used to part or all of AP to configure corresponding beacon frame time point, indication AP sends beacon frame after the time point of corresponding beacon frame arrives.
13. devices as claimed in claim 12, is characterized in that, described free time section determination module, also for:
Can perceive AP that the quantity that transmits of other AP is maximum as center AP; By definite free time, the start time point of section is configured to the beacon frame time point of center AP.
14. devices as claimed in claim 13, is characterized in that, described configuration module specifically for:
For an AP that need to configure beacon frame time point, determine the pre-configured beacon frame time point of this AP and the difference of beacon frame time point that needs configuration; By the duration in the initialization beacon frame cycle of this AP, the interval frame of definite difference and priority be SIFS's and as this AP duration in current transmission beacon frame cycle, and using the duration in initialization beacon frame cycle as after the duration in transmission beacon frame cycle.
15. devices as claimed in claim 13, is characterized in that, described configuration module specifically for:
For an AP that need to configure beacon frame time point, determine the pre-configured beacon frame time point of this AP and the difference of beacon frame time point that needs configuration; By the timestamp of the initialization beacon frame of this AP, the timestamp interval frame of definite difference and priority and send beacon frame as this AP.
16. devices as claimed in claim 13, is characterized in that, described configuration module specifically for:
For an AP that need to configure beacon frame time point, determine the difference of the beacon frame time point of beacon frame time point that this AP need to configure and center AP; Center AP is sent to the timestamp of beacon frame, the timestamp interval frame of definite difference and priority and send beacon frame as this AP.
17. devices as described in as arbitrary in claim 13 ~ 16, is characterized in that, described beacon frame time point confirm module specifically for:
In the AP composition set that need to distribute beacon frame time point, determine the maximum center AP of the quantity that transmits that can perceive other AP; By center AP, center AP can perceive the AP transmitting, and the AP transmitting that can perception center AP forms a central. set, and each AP in this group can be perceived to the AP transmitting, and the AP transmitting that can perceive at least one AP in this group in other AP outside this group forms a particular group; Judge whether to also have ungrouped AP, if have, the all AP in all ungrouped AP and particular group are formed to new set, delete particular group, and determine and can perceive the maximum center AP of the quantity that transmits of other AP in new set, return center AP, the AP transmitting that center AP can perceive the AP transmitting and can perceive center AP forms the step of a central. set; Otherwise the whole AP according to the order of grouping in being every group distribute corresponding beacon frame time point.
18. devices as claimed in claim 12, is characterized in that, described free time section determination module also for:
Judge whether definite free time section is not less than the required duration that sends the beacon frame that whole AP are corresponding;
If so, beacon frame time point determination module is that whole AP configure corresponding beacon frame time point; Otherwise beacon frame time point determination module is that part AP configures corresponding beacon frame time point.
19. devices as claimed in claim 18, is characterized in that, described free time section determination module also for: determine other section sending in the beacon frame cycle free time;
Beacon frame time point determination module: also for determining beacon frame time point corresponding to remaining AP in other of determining in section, and configure corresponding beacon frame time point for remaining AP free time.
20. 1 kinds send the device of beacon frame, it is characterized in that, this device comprises:
Receiver module: configure corresponding beacon frame time point for receiving part or all of AP;
Sending module: for configuring corresponding beacon frame time point transmission beacon frame according to receiving part or all of AP.
CN201210418682.9A 2012-10-26 2012-10-26 Method, system and device for indicating beacon frame sending and sending beacon frame Active CN103796277B (en)

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CN104853375A (en) * 2015-05-14 2015-08-19 江苏中兴微通信息科技有限公司 Sending method for avoiding beacon frame collision in enhanced wireless local area network
CN110612748A (en) * 2017-03-15 2019-12-24 开利公司 Method and wireless communication system for managing idle time of an access point
WO2020019905A1 (en) * 2018-07-25 2020-01-30 华为技术有限公司 Method for controlling transmission of beacon frame, and related apparatus
CN111031525A (en) * 2019-12-17 2020-04-17 杭州迪普科技股份有限公司 Beacon frame sending method and device

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CN104853375A (en) * 2015-05-14 2015-08-19 江苏中兴微通信息科技有限公司 Sending method for avoiding beacon frame collision in enhanced wireless local area network
CN104853375B (en) * 2015-05-14 2018-03-09 江苏中兴微通信息科技有限公司 The sending method of beacon frame collision is avoided in a kind of enhanced wireless LAN
CN110612748A (en) * 2017-03-15 2019-12-24 开利公司 Method and wireless communication system for managing idle time of an access point
CN110612748B (en) * 2017-03-15 2023-03-28 开利公司 Method for managing idle time of access point and wireless communication system
WO2020019905A1 (en) * 2018-07-25 2020-01-30 华为技术有限公司 Method for controlling transmission of beacon frame, and related apparatus
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CN111031525A (en) * 2019-12-17 2020-04-17 杭州迪普科技股份有限公司 Beacon frame sending method and device
CN111031525B (en) * 2019-12-17 2023-05-26 杭州迪普科技股份有限公司 Beacon frame sending method and device

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